JP4952907B2 - Superabsorbent composite sheet and absorbent article - Google Patents

Description

  The present invention relates to a superabsorbent composite sheet and an absorbent article having the superabsorbent composite sheet. More specifically, the superabsorbent composite sheet having a water-resistant surface, and an absorbent having the superabsorbent composite sheet. It relates to body articles.

  In absorbent articles such as disposable diapers, napkins, and adult incontinence products, measures to prevent stuffiness and fogging are indispensable, and how to perform post-use treatment simply and hygienically is an important product design point. It has become to.

  As a means for that, a diaper having a function of separating urine and feces has been proposed (see Patent Documents 1 to 6). Examples of these methods include a method of separately providing urine and feces by providing a urine opening at the front of the surface of the absorbent article and a stool opening at the rear, and a partition member near the center. Examples include a method of providing a (urine / feces separator) and separating urine / feces before and after.

  However, in reality, since the number of urine discharges is large, it can be said that diapers are originally designed mainly for absorption of urine. For this reason, if the absorbent body is simply divided in the front and rear, and the front part is dedicated to urine and the rear part is dedicated to feces, the urine absorption function is greatly reduced. Then, for the purpose of ensuring the absorption function of urine, patent document 5 provides the 2nd leak-proof body in the rear part of the absorber, and made the urine absorption layer in the lower part of the 2nd leak-proof body, and the 2nd leak-proof body An absorbent article having a so-called two-story structure in which the upper part of the bag is used as a storage space for stool is disclosed. Thereby, it becomes possible to separate and process urine and feces without reducing the amount of urine absorbed and contained. However, with such a configuration, the second leak preventer and the absorbent layer are required separately, which is a bulky configuration in the absorbent article, and there is a problem in terms of downsizing the absorbent article. In addition, such a configuration has a problem in that it is complicated in terms of manufacturing.

In addition, as a method for absorbing urine into the absorber, conventionally, a structure in which a liquid-permeable surface sheet, an acquisition layer having a function of distributing liquid, and an absorber are provided in order from the surface of the absorbent article. By doing so, a method of moving urine from the upper side to the lower side of the article has been adopted. On the other hand, Patent Document 6 discloses an absorbent product that employs a configuration in which the surface of the front portion of the absorber is covered with a liquid-impermeable surface sheet and a liquid passage is provided on both sides. By adopting such a configuration, liquid such as urine is absorbed from the backsheet side to the surface side of the absorbent product after moving from the surface of the absorbent product to the backsheet side through the passages on both sides. Will be. However, such a configuration has a practical problem in terms of fluidity of liquid such as urine from the surface of the absorbent product to the absorber side.
JP-A-6-327715 Japanese National Patent Publication No. 9-510384 JP 9-510385 gazette Japanese Patent Laid-Open No. 11-113958 JP 2006-055308 A International Publication No. 2004/052257 Pamphlet International Publication No. 02/065965 Pamphlet JP 2006-116157 A Japanese Patent Application No. 2006-11855 JP 2002-20957 A Japanese Patent Application Laid-Open No. 2003-103677 JP 2003-103740 A

  The present invention has been made in view of the above-mentioned problems, and can be manufactured by a simple process, has no practical problem, and maintains a sufficient liquid absorption function, while maintaining a liquid component and a solid component. It is an object of the present invention to provide a highly water-absorbent composite sheet that can be efficiently processed, and an absorbent article having the highly water-absorbent composite sheet.

The superabsorbent composite sheet according to the present invention comprises an SAP carrying layer having the ability to absorb liquid components, an absorbent diffusion layer having hydrophilicity laminated on the SAP carrying layer, and laminated on the absorption diffusion layer. And a water-absorbing hydrophobic surface layer having liquid impermeability , wherein the SAP-supporting layer, the absorption-diffusion layer, and the hydrophobic surface layer are integrated. It is characterized by. As a result, movement and diffusion of liquid components such as urine in the superabsorbent composite sheet are stably performed, and solid components such as feces are received on the surface of the superabsorbent composite sheet, and the liquid component and the solid component are separated. The liquid component can be efficiently absorbed by the SAP support layer while being stored separately.

In the highly water-absorbent composite sheet according to the present invention, the water pressure resistance of the hydrophobic surface layer is 50 mmH ₂ O or more. Thereby, while the stool is stably received on the surface, the movement / diffusion of the liquid component in the XY direction on the surface of the superabsorbent composite sheet is promoted.

The water-absorbing composite sheet according to the present invention is characterized in that a water pressure resistance of the hydrophobic surface layer is 100 mmH ₂ O or more. Thereby, the acceptance of stool is further stabilized, and the movement / diffusion of the liquid component in the XY direction on the surface of the superabsorbent composite sheet is further promoted.

  The superabsorbent composite sheet according to the present invention is characterized in that a surface diffusion layer having hydrophilicity and liquid permeability is further provided on the surface of the hydrophobic surface layer. Thereby, in addition to the above, the movement / diffusion of the liquid component on the surface of the highly water-absorbent composite sheet is made more uniform.

  In the superabsorbent composite sheet according to the present invention, the hydrophobic surface layer has a liquid permeation zone. Thereby, the Z direction of the superabsorbent composite sheet, that is, the passage of the liquid component from the surface of the superabsorbent composite sheet to the SAP support layer is secured, and as a result, the liquid component is removed from the surface of the superabsorbent composite sheet. It is possible to easily lead to the SAP support layer.

  In the highly water-absorbent composite sheet according to the present invention, the liquid permeation zone may have an opening shape, the liquid permeation zone may have a slit shape, and the liquid permeation zone depends on a surfactant. It may have been hydrophilized.

  Further, the absorbent article according to the present invention is disposed away from the wearer's body, and has a liquid-impermeable bottom leak preventer, and is disposed on the wearer's body side from the bottom leak preventer, An absorbent article having the above-described superabsorbent composite sheet, wherein the superabsorbent composite sheet is disposed such that the surface of the hydrophobic surface layer faces the wearer's body. And As a result, liquid components such as urine move and diffuse in the X-Y direction in the superabsorbent composite sheet, so that solid components such as feces are received on the surface of the superabsorbent composite sheet, It is possible to efficiently cause the liquid component to be absorbed by the SAP support layer while being separated and stored.

  The absorbent article according to the present invention is characterized in that the absorbent article further has an absorbent having an ability to absorb a liquid component between the superabsorbent composite sheet and the bottom leak preventer. Thereby, in addition to the above, the absorption capability of the liquid component is enhanced.

  In the absorbent article according to the present invention, the superabsorbent composite sheet is disposed only from a rear body portion corresponding to the back side of the wearer's body to a central portion corresponding to the crotch portion of the wearer's body. It is characterized by being. Thereby, it can be set as the structure according to the wearer's anatomical characteristic, obtaining the above-mentioned effect.

  The absorbent article according to the present invention further includes a guide sheet having liquid permeability so as to come into contact with the surface of the superabsorbent composite sheet. Thereby, in addition to the above, the diffusion / movement of the liquid component in the XY direction on the surface of the superabsorbent composite sheet is further promoted.

  The absorbent article according to the present invention is characterized in that the guide sheet is disposed only in a front body portion of the absorbent article. Thereby, in addition to the above, the movement / diffusion of the liquid component in the XY direction on the surface of the highly water-absorbent composite sheet is further promoted at the location where the discharge of the liquid component such as urine is concentrated.

  The absorbent article according to the present invention is characterized by further having a stool treatment sheet so as to be disposed above the superabsorbent composite sheet. Thereby, in addition to the above-mentioned, the moisture content is high, and the fluid soft stool can be stably treated.

  The absorbent article according to the present invention is characterized in that a urine / feces separation unit is further provided in a central portion corresponding to the crotch portion of the wearer's body. Thereby, in addition to the above, the effect of preventing the mixing of the liquid component and the solid component is further promoted.

  According to the superabsorbent composite sheet according to the present invention, absorption of the liquid component is avoided while avoiding remaining of the liquid component on the surface of the superabsorbent composite sheet and preventing mixing of the liquid component and solid components such as feces. It becomes possible to make the most of the ability.

  Moreover, according to the absorbent article according to the present invention, while the liquid component remains on the surface of the absorbent article in contact with the wearer that leads to stuffiness or blurring, the mixing of the liquid component and solid components such as stool is prevented. It is possible to maximize the absorption capability of the liquid component. As a result, a wearer's wearing feeling improves.

  Hereinafter, the superabsorbent composite sheet and absorbent article according to the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.

  The present invention provides a highly water-absorbing composite sheet composed of a surface layer and an SAP support layer, and a multifunctional highly water-absorbing composite sheet in which the surface layer is composed of a hydrophobic sheet having high water resistance. Is incorporated into the absorbent article as an absorbent, so that it is possible to efficiently absorb urine from the front by the advantage of the liquid-impermeable surface sheet, and the rear is the first mentioned in the prior art. According to the advantages of the two leak preventers, the absorbent article is proposed so that it has a feces accommodation function as it is.

  Such a structure is clearly different from a conventionally known absorbent article configured to have a top sheet, an absorbent body and a back sheet from the side close to the wearer, both structurally and functionally. Is.

  That is, in this conventionally known absorbent article, liquid components such as urine discharged from the wearer are absorbed in the absorbent body via the top sheet by moving in the vertical direction of the absorbent article. .

  On the other hand, in the present invention, liquid components such as urine discharged from the wearer move and diffuse in the X-Y direction on the surface of the superabsorbent composite sheet, and then move to the lowermost SAP support layer. Absorption of liquid components occurs from the bottom of the water-absorbent composite sheet upward. Moreover, solid components such as stool discharged from the wearer are received on the surface of the superabsorbent composite sheet. Such movement / diffusion / absorption / acceptance eliminates the need to use a conventionally used top sheet or even an absorbent covering sheet.

  Further, according to the present invention, mixing of the liquid component absorbed in the SAP support layer disposed in the lowermost layer of the superabsorbent composite sheet and the solid component received on the surface of the superabsorbent composite sheet is prevented. The For this reason, it is not necessary to adopt a two-story structure using the second leak preventer, which has been conventionally employed.

  In the present invention, when the absorbent article according to the present invention is actually worn, the side closer to the wearer's skin is also referred to as “upper”, and the side far from the wearer's skin is also referred to as “lower”. Further, when the absorbent article according to the present invention is actually worn, the side corresponding to the abdomen side of the wearer's body is also referred to as “front”, and the side corresponding to the back side is also referred to as “rear”. Moreover, in order to make an understanding easy in each figure, the member which is actually contacting may be shown spaced apart.

(Superabsorbent composite sheet according to the present invention)
FIG. 1 is a diagram showing an example of a superabsorbent composite sheet according to the present invention, and is a diagram showing a cross section of a superabsorbent composite sheet in which a hydrophobic surface layer, an SAP support layer, and an absorption diffusion layer are arranged. A highly water-absorbent composite sheet 10 according to the present invention is formed by integrally forming a hydrophobic surface layer 12 having water resistance, an absorption / diffusion layer 14 having hydrophilicity, and an SAP support layer 16 having liquid component absorption ability. It has a structure.

  First, the role played by each layer in the superabsorbent composite sheet will be described.

  The role of the hydrophobic surface layer 12 is to make the surface of the hydrophobic surface layer function as a surface diffusing / moving surface for liquid components such as urine. Another role of the hydrophobic surface layer is to efficiently use the surface of the hydrophobic surface layer as a receiving surface for solid components such as feces.

  The role of the absorption diffusion layer 14 is to diffuse liquid components such as body fluids in the X-Y direction of the superabsorbent composite sheet in the absorption diffusion layer so as to efficiently exhibit the absorption capability of the SAP support layer. is there. Thus, as a liquid component which exists in an absorption diffusion layer, liquid components, such as a body fluid which overflows and permeate | transmits from the SAP support layer of the lower part of a highly water-absorbing composite sheet, are mentioned, for example. Further, as an additional effect of the absorption diffusion layer 14, there is also an effect as a filter that prevents SAP fine particles similar to dust contained in the SAP support layer from physically permeating and moving to the hydrophobic surface layer. is there. This can be said to be a remarkable effect not only when using the superabsorbent composite sheet according to the present invention but also when producing the superabsorbent composite sheet.

  The role of the SAP carrying layer 16 is to fully absorb and immobilize body fluids by fully utilizing the absorption and swelling phenomenon of SAP carried on this layer.

  In the present invention, in principle, it is possible to form a superabsorbent composite sheet only with a two-layer structure of a hydrophobic surface layer and an SAP support layer. The effect of these two layers, particularly the SAP support layer, is also possible. In order to improve the utilization efficiency of the absorption capacity of the three-layer structure, a three-layer structure including an absorption diffusion layer is a more desirable structure.

  Hydrophobic surface layer materials include PE, PP, EVA, PET-based resins and elastomer films and nets, or PE fibers, PP fibers, PET fibers, PE / PET composite fibers, acetate fibers, etc. Nonwoven fabrics and open tows made of synthetic fibers can be used. Of these, synthetic nonwoven fabrics are preferred from the viewpoint of water resistance, and spun-melt nonwoven fabrics such as PE or PP-based spunbond, meltblown, or SMS, which are composites thereof, are more preferred.

The water resistance of the hydrophobic surface layer preferably has a 50 mm H ₂ O or more water pressure resistance, and more preferably 100 mm H ₂ O or more. The upper limit of the water pressure resistance may have a high degree of water resistance such as a composite sheet of a waterproof sheet and a woven fabric, such as an elastomer, a polyethylene film, a laminate of a polypropylene film and a woven fabric, For example, it may be 500 mmH ₂ O or less. The basis weight is 8 to 50 g / m ² , and 12 to 20 g / m ² is selected in consideration of cost and flexibility.

The material of the absorption diffusion layer is not particularly limited as long as it has hydrophilicity. Among these, hydrophilic sheets and nonwoven fabrics that are easily wetted and have a large capillary moving effect are preferable. Typical examples include dry and wet nonwoven fabrics mixed with tissue paper, rayon, lyocell, cotton, and the like, and cellulose-based spunbonds such as TCF (Nikamura Chemical) and Benlyse (Asahi Kasei). The basis weight of the absorption diffusion layer is not particularly limited, but is preferably 50 g / m ² or less in consideration of cost and the like.

  The SAP support layer is not particularly limited as long as it has a layer structure having particles having absorptivity with respect to a liquid component such as SAP (superabsorbent polymer). For example, the SAP particles are included in the nonwoven fabric, the SAP is fixed by hot melt, etc., the SAP sheet is polymerized after impregnating or spraying the acrylic acid monomer on the nonwoven fabric, or the pulp layer is mixed with SAP to form a sheet Airlaid mats, etc. are used, but SAP slurry is coated on the card web side of the laminated web with the structure of SMS / tissue / card web, desolvated and dried to carry hydrophobic surface layer / absorbing diffusion layer / SAP The layers may be manufactured in one piece.

  In the SAP support layer constituting the superabsorbent composite sheet according to the present invention, the presence form of the SAP particles is not particularly limited as long as the absorption characteristics of the SAP support layer can be exhibited. For example, as shown in FIG. 1 (A), SAP may be partially supported on a fiber web made of polyethylene terephthalate. Further, as shown in FIG. 1 (B), an SAP may be supported on the entire surface of a fiber web made of polyethylene / polyethylene terephthalate composite fiber. Further, as shown in FIG. 1 (C), SAP may be supported on a fiber web made of polyester by fixing it with a hot melt method. Further, as shown in FIG. 1 (D), the wood fluff pulp may be mixed with SAP, press-fixed and supported.

  In the SAP support layer constituting the superabsorbent composite sheet according to the present invention, “supporting” is a general term for a state in which SAP is included and immobilized in components other than SAP of the SAP support layer. Fixing by hot melt method, fixing by press method, fixing by coating, fixing by airlaid method, fixing by wood pulp layer, and the like.

  The method for forming the superabsorbent composite sheet according to the present invention is not particularly limited as long as it is a method capable of integrating the hydrophobic surface layer, the absorption diffusion layer, and the SAP support layer. For example, a method of integrating the three layers by whole surface fusion or partial heat fusion as used in the manufacturing process of the nonwoven fabric, or a method of integrating the three layers by hydroentanglement method or the like can be mentioned. In addition, a method in which a two-layer composite of SAP / pulp mixture / tissue is made by the Airrid method, and a hydrophobic surface layer such as SMS is joined to it in a separate process to form a three-layer structure, etc. The

  Thus, by integrating the hydrophobic surface layer, the absorption / diffusion layer, and the SAP support layer, the respective roles of the three layers as described above can be organically exhibited. As a result, It is possible to maximize the absorption characteristics of the SAP support layer. That is, liquid components such as urine supplied to the surface of the hydrophobic surface layer diffuse and move in the XY direction on the surface of the superabsorbent composite sheet, and most of them move to the lower surface of the superabsorbent composite sheet. The lower surface comes into contact with the SAP support layer side and is absorbed by the SAP support layer. On the other hand, a part of the liquid component moved to the SAP support layer side is moved to the SAP support layer by a moving force such as capillary action. The region formed by the hydrophobic surface layer and the absorption diffusion layer and / or the region formed by the absorption diffusion layer and the SAP support layer is reached beyond the support layer. The liquid components that have reached these regions are further diffused in the XY direction through these regions until they are absorbed by the SAP support layer, since these layers are integrated, and in this region, Will be stored. Therefore, absorption of the liquid component by the SAP support layer occurs not only from the lower surface side of the superabsorbent composite sheet, but also from the absorption diffusion layer side of the SAP support layer. For these reasons, the superabsorbent composite sheet according to the present invention can exhibit a sufficient absorption capacity by being integrated.

In addition, as shown in FIG. 1A, the superabsorbent composite sheet according to the present invention is made of SMS having a water pressure resistance of 150 mmH ₂ O as a hydrophobic surface layer (weight per unit: 13 g / m ² ) and tissue as an absorption diffusion layer. (basis weight: 15g / ^{m 2)} and, PET (7d × 51 mm) web as SAP carrying layer (basis weight: 30g / ^{m 2)} in the that the SAP was partially supported so as to be 200 g / ^{m 2} 3 The layers may be integrated.

In addition, as shown in FIG. 1B, the superabsorbent composite sheet according to the present invention is made of SMS having a water pressure resistance of 120 mmH ₂ O as a hydrophobic surface layer (weight per unit: 11 g / m ² ) and tissue as an absorption diffusion layer. (15 g / ^{m 2)} and, PE / PET composite fiber as SAP carrying layer (3d × 51 mm) web (basis weight: 30g / ^{m 2)} to the those supported on an amount to be 150 g / ^{m 2} of SAP on the entire surface Three layers may be integrated.

Moreover, as shown in FIG. 1C, the superabsorbent composite sheet according to the present invention has SMS (13 g / m ² ) as a hydrophobic surface layer, tissue (15 g / m ² ) as an absorption diffusion layer, The SAP support layer may have a structure in which granular SAP is fixed to the entire polyester web by hot melt and three layers of those supporting 150 g / m ² are integrated.

Further, as shown in FIG. 1 (D), the superabsorbent composite sheet according to the present invention is composed of SB (15 g / m ² ) having a water pressure resistance of 50 mmH ₂ O as a hydrophobic surface layer and rayon spunlace as an absorption diffusion layer. (20 g / m ² ) is mixed as a SAP carrying layer so that wood pulp and SAP are 50/50, press-fixed, and three layers of mats carrying SAP so as to be 300 g / m ² are integrated. It may be what you did.

  In the highly water-absorbent composite sheet according to the present invention, a surface diffusion layer may be disposed on the surface of the hydrophobic surface layer in addition to the above configuration. This embodiment is shown in FIG. FIG. 2 is a diagram showing an example of the superabsorbent composite sheet according to the present invention, in which the surface diffusion layer is combined with the structure of the hydrophobic surface layer, the SAP support layer and the absorption diffusion layer, and further on the surface of the hydrophobic surface layer. It is a figure which shows the cross section of the highly water-absorbing composite sheet. In this configuration, in the above-described superabsorbent composite sheet, a surface diffusion layer is further arranged on the surface of the superabsorbent composite sheet having a three-layer structure.

  The surface diffusion layer is not particularly limited as long as it has liquid permeability, and examples thereof include a nonwoven fabric made of synthetic fiber and an opening film. Above all, spun laces and dry nonwoven fabrics containing hydrophilic fibers such as diapers and napkins such as top sheets and skin contact sheets for absorbent articles, polyethylene, surface treated with surfactants, and polyethylene. A liquid-permeable synthetic fiber nonwoven fabric such as made of polyester, polyester, or polypropylene, or a liquid-permeable opening film is used.

  The arrangement method of the surface diffusion layer on the hydrophobic surface layer is not particularly limited as long as it is a method in which the surface diffusion layer is partially or wholly fixed to the surface of the hydrophobic surface layer.

  By providing the surface diffusion layer, the movement / diffusion of liquid components such as urine in the XY direction on the surface of the superabsorbent composite sheet is further promoted. This movement / diffusion will be described later.

The superabsorbent composite sheet according to the present invention having a surface diffusion layer has a rayon spunlace (weight per unit area: 20 g / m ² ) as the surface diffusion layer and a hydrophobic surface layer as shown in FIG. the SMS (13g / ^{m 2),} tissue (basis weight: 15g / ^{m 2)} as the absorbing diffusion layer, those the SAP polyester web was partially coated by supporting 150 g / ^{m 2} corresponds as SAP carrier layer It may have a structure in which four layers are integrated.

Moreover, as shown in FIG. 2 (B), the superabsorbent composite sheet according to the present invention having a surface diffusion layer comprises a thermal bond nonwoven fabric (15 g / m ² ) made of polyester fibers having a surface hydrophilic as a surface diffusion layer. , the water pressure resistance 120mmH ₂ O as a hydrophobic surface layer SMS (basis weight: 11g / ^{m 2)} and the tissue (15g / ^{m 2)} as the absorbing diffusion layer, PE / PET composite fiber (3d × 51 mm) as an SAP supporting layer A web (weight per unit area: 30 g / m ² ), in which four layers of SAP supported on the entire surface in an amount of 150 g / m ² may be integrated.

Moreover, as shown in FIG. 2C, the superabsorbent composite sheet according to the present invention having a surface diffusion layer is made of TCF (manufactured by Futura Chemical) (weight per unit: 20 g / m ² ) as a surface diffusion layer. SMS (13 g / m ² ) is used as the surface layer, tissue (15 g / m ² ) is used as the absorption diffusion layer, and granular SAP is fixed to the entire polyester web as the SAP support layer using hot melt, and 150 g / m ² equivalent is supported. This is a structure in which four layers are integrated.

(D) of FIG. 2 absorbs and diffuses 17 g / m ² of PE aperture film (Toledogar) used for sanitary napkins as a surface diffusion layer and LLDPE film (20 g / m ² ) as a hydrophobic surface layer. As a layer, tissue (15 g / m ² ) was blended with pulp / SAP = 50/50 as an SAP-supporting layer, and then four layers of SAP sheets by an 280 g / m ² airlaid method bonded with an acrylic binder were integrated. It has a structure.

  In the superabsorbent composite sheet according to the present invention, a liquid permeation zone capable of permeating liquid components such as urine in the Z direction of the superabsorbent composite sheet may be provided on the surface of the hydrophobic surface layer. This mode is shown in FIGS. 3A to 3D, FIGS. 4A to 4D, and FIG. These drawings are plan views showing an example having a liquid permeation zone in the superabsorbent composite sheet according to the present invention.

  Since the superabsorbent composite sheet according to the present invention has a hydrophobic hydrophobic surface layer as described above, the movement of liquid components such as urine and liquid components contained in feces etc. is mainly in the hydrophobic surface layer. Although it occurs in the plane direction of the surface, that is, the X direction and the Y direction, this liquid permeation zone may be provided when the movement of the liquid component is caused in the Z direction of the superabsorbent composite sheet. Thereby, the movement of the liquid component can be further stabilized.

  As the liquid permeation zone, an opening is provided in a part of the hydrophobic surface layer, or a part of the hydrophobic surface layer is made of a nonionic, cationic, anionic or betaine surfactant. Examples of the hydrophilic treatment are exemplified.

  The shape of the liquid permeation zone is not particularly limited, and is slit-shaped (FIGS. 3A and 4A, and FIGS. 3C and 4C), strip-shaped (FIGS. 3B and 4B), and circular (FIGS. 3D and 4D). And a linear shape (FIG. 5). Further, the liquid permeation zone may be provided at a single location (3A and FIG. 4A, and FIGS. 3B and 4B), or provided at a plurality of locations (FIGS. 3C and 4C, FIG. 3D, FIG. 4D, and FIG. 5). Also good. Further, the distribution state of the liquid permeation zone is not particularly limited, but it may be arranged uniformly / at regular intervals as shown in FIGS. 3D and 4D and FIG. In addition, the liquid permeation zone may be disposed on one end side of the superabsorbent composite sheet (FIGS. 3A to 3D and FIGS. 4A to 4D), and is disposed throughout the superabsorbent composite sheet. (FIG. 5).

  Specifically, as shown in FIG. 3A, the liquid permeation zone is formed from the front part of the front body part of the absorbent article to the center part of the absorbent article when the superabsorbent composite sheet is provided on the absorbent article. 3B may be provided in the form of a vertically long band, as shown in FIG. 3B, it may be provided in the form of a horizontally long band at the front part of the front body, and as shown in FIG. 3C, the band is short in two places on the front body. 3D, or as shown in FIG. 3D, the front body may be provided uniformly in the form of spots.

  Further, the liquid permeation zone may be provided at the rear portion of the absorbent article, that is, at the position corresponding to the back body when the superabsorbent composite sheet is provided in the absorbent article. This aspect is effective when liquid components contained in feces or the like can be transmitted in the Z direction.

  Specifically, as shown in FIG. 4A, it may be provided in a longitudinal band shape at a location from the rear part to the center part of the back body part, and as shown in FIG. 4B, it is provided in a lateral band form at the rear part of the back body. Alternatively, as shown in FIG. 4C, it may be provided in a short strip shape at two places on the back body, or as shown in FIG. 4D, it may be provided in a spot shape uniformly throughout the back body.

  Moreover, as shown in FIG. 5, the liquid permeation zone may be provided in a line shape over the longitudinal direction of the entire length of the superabsorbent composite sheet. In this aspect, when the superabsorbent composite sheet is provided on the absorbent article, the absorbent article is disposed at a position corresponding to the front body to the back body of the absorbent article.

  The liquid permeation zone may be provided by appropriately combining each of the above embodiments.

(Absorbent article according to the present invention)
6A and 6B are schematic views showing an example of an absorbent article according to the present invention, where (a) shows a plan view thereof and (b) shows a cross-sectional view taken along line YY ′. Show. The absorbent article according to the present invention includes a bottom leak-proof body 112 having liquid impermeability such as a so-called back sheet, and the highly water-absorbent composite sheet 10 according to the present invention. The surface layer 12 is arranged so as to face the wearer's body. Therefore, in each of FIG. 6A and FIG. 6B (a), the superabsorbent composite sheet 10 shows the hydrophobic surface layer 12 of the superabsorbent composite sheet.

  The bottom leak preventer 112 is not particularly limited as long as it has liquid impermeability. Examples thereof include a resin film such as PE, PP, PET, EVA, and a body fluid impermeable sheet such as a foamed sheet. In addition, a multilayer sheet having these materials may be used, and the multilayer sheet is a combination of a relatively low basis weight non-woven fabric such as SB, SMS, thermal bond, etc. and the above film or sheet. May be.

  As the superabsorbent composite sheet 10, all forms of the superabsorbent composite sheet according to the present invention described above can be adopted. In the absorbent article according to the present invention, the superabsorbent composite sheet 10 may be arranged in any manner as long as it is arranged on the side close to the wearer's body, for example, as shown in FIG. 6A. The absorbent article may be disposed so as to cover substantially the entire length of the absorbent article. As shown in FIG. 6B, from the rear body portion corresponding to the rear side of the wearer, that is, the back side, Although it may be arranged only up to the central part corresponding to the crotch part and not shown, it may be arranged only from the front body part corresponding to the abdomen side of the wearer's body to the central part.

  By adopting such a configuration, on the surface of the superabsorbent composite sheet constituting the absorbent article, liquid components contained in urine or feces etc. move and diffuse in the plane direction of the superabsorbent composite sheet. It is absorbed by the SAP support layer provided on the bottom leak preventer side of the superabsorbent composite sheet. The movement / diffusion of the liquid component on the surface of the superabsorbent composite sheet will be described later.

  6A and 6B, the highly water-absorbent composite sheet 10 is shown to be composed of a hydrophobic surface layer 12, an absorption diffusion layer 14, and an SAP support layer 16, but other configurations, for example, A superabsorbent composite sheet provided with the surface diffusion layer 22 may also be employed.

  In the absorbent article according to the present invention, an absorbent body 114 may be further provided between the superabsorbent composite sheet 10 and the bottom leak preventer 112 for the purpose of improving the liquid component absorption capacity. The arrangement form of the absorbent body 114 is not particularly limited as long as it is the above-mentioned purpose, and may be arranged over the entire length of the absorbent article as shown in FIGS. 6A and 6B. You may arrange | position only in the location which desires an improvement.

  The absorber is not particularly limited as long as it can absorb a liquid component. For example, a configuration in which powdered wood pulp, processed / unprocessed SAP is contained in a base material such as a nonwoven fabric, synthetic fiber, etc., can be mentioned, and the configuration of the SAP support layer in the superabsorbent composite sheet according to the present invention described above can be mentioned. It may be used. Among these, a non-woven fabric / SAP mixture obtained by mixing SAP particles with a synthetic fiber non-woven fabric and a sheet-like absorbent body may be used in view of avoiding form stability and falling off.

  In the absorbent article according to the present invention, a skin contact sheet 116 having liquid permeability may be provided so as to come into contact with the wearer for the purpose of improving the surface feel when worn. In particular, as shown in FIG. 6B, the skin contact sheet 116 has one end of the skin contact sheet disposed between the superabsorbent composite sheet 10 and the bottom leak preventer 112, and the other end of the skin contact sheet is the absorbent body. 114 may be arranged.

  The skin contact sheet is not particularly limited as long as it is made of a material having liquid component permeability. For example, a conventionally known top sheet can be used. Examples of the material for the skin contact sheet include synthetic fibers such as polypropylene, polyethylene terephthalate, polyethylene, and acetate, and hydrophilic fibers such as rayon and cotton. Moreover, as a form of a skin contact sheet, the nonwoven fabric obtained by combining these materials suitably, a dry / wet nonwoven fabric, etc. are mentioned.

  In the absorbent article according to the present invention, for the purpose of improving the wearer's feeling of wearing, etc., the elastic inner gather 122 and outer gather 124, the waistband 126 for ensuring the wearing of the absorbent article to the wearer, etc. You may provide suitably.

  In the absorbent article according to the present invention, for the purpose of promoting the movement / diffusion of the liquid component on the surface of the superabsorbent composite sheet on the hydrophobic surface layer side of the superabsorbent composite sheet, that is, the wearer side, the guide sheet 132. May be provided. In the absorbent article according to the present invention, when the superabsorbent composite sheet does not have the surface diffusion layer, the guide sheet is disposed on the hydrophobic surface layer, and the superabsorbent composite sheet has the surface diffusion layer. When it has, a guide sheet will be arrange | positioned on a surface diffusion layer. These modes are shown in FIG. FIG. 7 is a partial schematic view for explaining the movement / diffusion of the liquid component on the surface of the superabsorbent composite sheet in the absorbent article according to the present invention, wherein the left side of the figure shows a plan view and the right side shows the left side. Sectional drawing along the double arrow xx of the figure of this is shown. In FIG. 7, (A) is a view showing a case where a hydrophobic surface layer is provided on the surface of the superabsorbent composite sheet, and (B) is a guide sheet on the surface of the hydrophobic surface layer of (A). It is a figure which shows the case where it provided, (C) is a figure which shows the case where a surface diffusion layer is provided in the surface of a highly water-absorbent composite sheet, (D) is the surface of the surface diffusion layer of (C). It is a figure which shows the case where a guide sheet is provided.

  In the absorbent article according to the present invention, the movement / diffusion phenomenon of the liquid component in the vicinity of the surface of the superabsorbent composite sheet will be described. For convenience of explanation, a plane perpendicular to the thickness of the member, absorber or product, that is, a direction along the plane of the superabsorbent composite sheet is referred to as an XY direction. The direction corresponding to the width and length of the high water-absorbing composite sheet is referred to as the X direction and the Y direction, respectively. Of the directions substantially perpendicular to the width and length of the water absorbent composite sheet, the direction from the hydrophobic surface layer side to the SAP support layer side of the highly water absorbent composite sheet is referred to as the Z direction.

  Referring to FIG. 7A, in the absorbent article according to the present invention, when the liquid component L such as urine discharged from the wearer reaches the surface of the hydrophobic surface layer 12 of the superabsorbent composite sheet 10, Due to the water resistance of the surface of the hydrophobic surface layer 12, movement / diffusion occurs in the XY direction without shifting in the Z direction.

  The moved / diffused liquid component moves mainly in the side end portion of the superabsorbent composite sheet 10 and then moves in the Z direction, and is absorbed by the SAP support layer over time. Such an aspect of absorption of the liquid component in the present invention cannot be realized by a conventional absorbent product having a structure in which a permeable surface sheet and an absorbent body are combined. That is, in such a conventional absorbent product, when a liquid component is supplied, the component first passes through the top sheet in the Z direction, moves to the absorber, and then diffuses in the XY direction. However, in the absorbent article according to the present invention, movement / diffusion in the XY direction occurs first, followed by absorption by the SAP support layer. In the embodiment shown in FIGS. 7B to 7D, the liquid component moved and diffused in this way is similarly absorbed by the SAP support layer over time, and the description is omitted. To do.

  In the absorbent article according to the present invention, when the guide sheet 132 is provided on the surface of the hydrophobic surface layer 12 having the configuration (A), as shown in FIG. When it reaches the surface, it is moved and diffused in the XY direction by the characteristics that can promote the movement and diffusion of the liquid component of the guide sheet. Further, the moved / diffused liquid component also reaches the hydrophobic surface layer 12 of the superabsorbent composite sheet 10, and the surface of the hydrophobic surface layer also moves / diffuses in the manner described above. Therefore, by providing the guide sheet, the movement and diffusion of the liquid component in the XY direction is greatly promoted as compared with the mode (A), but the surface shape of the hydrophobic surface layer has an uneven state. In such a case, it is preferable to use a surface diffusion layer having a function of diffusing a liquid component on the surface as described later together with the guide sheet.

  Next, referring to FIG. 7C, in the absorbent article according to the present invention, the liquid component L such as urine discharged from the wearer reaches the surface of the surface diffusion layer 22 of the superabsorbent composite sheet 10. Then, due to the property of moving and diffusing the liquid component of the surface diffusion layer 22, it is moved and diffused more uniformly over the entire circumference in the XY direction of the surface of the surface diffusion layer. Further, the liquid component L reaches the surface of the hydrophobic surface layer 12 while being moved and diffused by the surface diffusion layer 22, and here, the movement and diffusion along the surface of the hydrophobic surface layer occurs. Therefore, by using the superabsorbent composite sheet in which the absorption diffusion layer is arranged, the movement / diffusion of the liquid component in the XY direction is promoted over the entire circumference as compared with the embodiment of FIG. And uniform.

  In the absorbent article according to the present invention, when the guide sheet 132 is provided on the surface of the surface diffusion layer 22 having the configuration shown in FIG. 7C, the liquid component L is, as shown in FIG. When the surface of the guide sheet is reached, it is moved and diffused in the XY directions by the characteristics that can promote the movement and diffusion of the liquid component of the guide sheet. At this time, due to the presence of the surface diffusion layer, the movement of the liquid component in the XY direction is made uniform over the entire circumference. Thus, by using the guide sheet and the surface diffusion layer in combination, movement / diffusion in the XY direction is greatly promoted as compared to the mode of FIG. Compared to the embodiment, it becomes more uniform.

  In summary, in the absorbent article according to the present invention, the superabsorbent composite sheet constituting the absorbent article promotes the movement and diffusion of the liquid component in the XY direction on the surface of the superabsorbent composite sheet. In view of the above, it is preferable to provide a guide sheet so as to be in contact with the hydrophobic surface (hydrophobic surface layer) of the superabsorbent composite sheet. Further, when the superabsorbent composite sheet according to the present invention has a surface diffusion layer on the hydrophobic surface layer, a guide sheet is provided so as to be in contact with the surface diffusion layer, and the surface diffusion layer and the guide sheet are used in combination. Thus, the uniform movement / diffusion of the liquid component is further improved.

The guide sheet 132 is not particularly limited as long as it is a material / configuration that can promote movement and diffusion of the liquid component. The material of the guide sheet is not limited as long as it has liquid permeability. For example, fibers made of polyethylene, polypropylene, polyethylene terephthalate may be mentioned, and may be a composite fiber using a plurality of these materials. Specifically, PE / PET composite fiber, PET / PET composite fiber, etc. Is mentioned. The fineness of these fibers may be 3d or more, and is preferably 5d or more. The apparent ratio of the fibers is preferably 0.1 g / cm ³ or less. The thickness of the fiber is preferably 1 to 5 mm when no load is applied. The form of the guide sheet is preferably bulky and highly porous. Among these, those having the following configuration are preferably used.

1) Liquid-permeable aperture film having a liquid distribution effect For example, a polyolefin system proposed by the present inventor and having a relatively large aperture of 0.5 mmφ or more and an introduction pipe as described in Patent Document 7 The film preferably has a thickness of 1 mm or more. In order to improve the familiarity and wettability of the liquid, it is desirable to perform surface hydrophilization with an activator or the like.

2) Bulky and highly porous liquid-permeable non-woven fabric The surface of the absorbent product is a non-woven fabric produced by a bulky dry method obtained by the air-through method or spot bond method as a sub-layer in contact with the top sheet. It has been. These can be used as the guide sheet of the present invention.

  In the absorbent article according to the present invention, the guide sheet may be appropriately disposed according to the application of the absorbent article. For example, the guide sheet may be disposed so as to cover the entire surface of the superabsorbent composite sheet, or may be disposed in the front body portion corresponding to the abdomen side of the wearer's body. It may be arranged in the back body part corresponding to, and may be arranged in the central part between the front body part and the back body part corresponding to the crotch part of the wearer's body. In particular, the guide sheet is preferably disposed in a portion where the introduction of the liquid component is concentrated (for example, the front body portion) and in the vicinity thereof in order to maximize the movement and diffusion of the liquid component.

  Next, regarding the relationship between storage of solid components such as stool and absorption of liquid components such as urine in the absorbent article according to the present invention, both storage of solid components such as stool and absorption of liquid components such as urine are A model of the structure of the related back body part will be described. FIG. 8 is an enlarged schematic diagram for explaining the relationship between the acceptance of the solid component on the surface of the superabsorbent composite sheet and the absorption of the liquid component in the absorbent article according to the present invention, and FIG. The case where it does not have a surface diffusion layer as a composite sheet is shown, and (B) shows the case where it has a surface diffusion layer as a superabsorbent composite sheet.

  Of the liquid component L such as urine discharged from the wearer and the solid component S such as stool, the liquid component L is supplied on the superabsorbent composite sheet in the front body part according to the manner described in FIG. The liquid component such as urine moves to the lower surface of the superabsorbent composite sheet and is moved to the back body part while being absorbed by the SAP support layer 16 of the superabsorbent composite sheet 10 constituting the absorbent article. In the rear body part, the solid component S such as feces has a lower fluidity than the liquid component L, and therefore the surface of the hydrophobic surface layer 12 constituting the superabsorbent composite sheet 10 (see FIG. 8A). Or it is received by the surface (refer FIG. 8 (B)) of the surface diffusion layer 22 which comprises the highly water-absorbing composite sheet 10. FIG. Therefore, the liquid component L and the solid component S discharged from the wearer are disposed separately with at least the hydrophobic surface layer 12 constituting the superabsorbent composite sheet 10 interposed therebetween. The liquid component L and the solid component S are disposed without being mixed with each other across the hydrophobic surface layer 12 due to the water resistance of the hydrophobic surface layer 12 and thus the property of not allowing the solid matter to permeate. . Thus, in the absorbent article according to the present invention, an effect of preventing mixing of the liquid component and the solid component can be obtained by using the highly water-absorbent composite sheet.

  Further, when excrement having fluidity such as loose stool is discharged from the wearer, the liquid component L and the solid component S are included in such discharge. Even in such a case, as described above, the liquid component L contained in the discharged material is supported by the SAP of the superabsorbent composite sheet 10 constituting the absorbent article according to the manner described in FIG. Absorbed by layer 16. On the other hand, the solid component S contained in such an effluent is received on the surface of the superabsorbent composite sheet 10 in accordance with the manner described in FIG. 8, and as a result, the liquid contained in such an effluent. The component L and the solid component S are disposed separately with the hydrophobic surface layer 12 constituting the superabsorbent composite sheet 10 interposed therebetween. Therefore, even when excrement having fluidity is discharged from the wearer, the mixing of the liquid component and the solid component is prevented by using the superabsorbent composite sheet in the absorbent article according to the present invention. Effect is obtained.

  In addition, when the liquid component L and the solid component S are contained in the discharge, when the liquid component such as moisture is relatively small, it is partially concentrated in the surface diffusion layer of FIG. In the case of many watery stools, such a stool concentration may be performed by providing a liquid permeation zone in the Z direction as described in FIGS. 4A to 4B.

Another aspect of the arrangement of the guide sheet of the absorbent article according to the present invention will be described with reference to FIG. FIG. 9 is a schematic view showing an example of an absorbent article according to the present invention, in which (a) shows a developed plan view thereof, and (b) and (c) show lines X ₁ -X ₁ ′ and It shows a cross-sectional view taken along the line _{X 2} -X 2 '. FIG. 9 is an example in which a guide sheet is particularly provided in the front body part, and is a schematic diagram showing an application example to an absorbent body for a diaper for children in particular.

  Referring to FIG. 9, in the absorbent article according to the present invention, the guide sheet 132 is disposed so as to be in contact with the superabsorbent composite sheet 10, and both ends in the X direction of the guide sheet 132 are superabsorbent composite sheet 10. And the bottom leak preventer 112 may be arranged so as to be inserted. That is, the guide sheet 132 may be disposed so that both end portions in the X direction of the guide sheet 132 reach the SAP carrying layer constituting the superabsorbent composite sheet 10.

  By adopting such an aspect, the liquid component discharged to the surface of the guide sheet 132 is separated from the surface of the guide sheet and the surface of the superabsorbent composite sheet by the characteristics of movement / diffusion of the liquid component of the guide sheet. After moving and diffusing in the above-described manner, the SAP carrying layer constituting the superabsorbent composite sheet 10 disposed facing the bottom surface leak preventer 112 is further formed by the characteristics of movement and diffusion of the liquid component of the guide sheet. Will be reached.

  On the other hand, when the guide sheet is disposed only in the front body portion of the absorbent article, the solid component S discharged from the wearer is stored on the surface of the superabsorbent composite sheet 10 according to the above-described manner of FIG. On the other hand, in the back body part where the guide sheet is not disposed, the surface of the superabsorbent composite sheet will be exposed, and the solid component S discharged from the wearer is high in the back body part. It is stored on the surface of the water-absorbent composite sheet 10. Therefore, the solid component S discharged from the wearer is stored separately from the liquid component L discharged from the wearer described above in accordance with the style of FIG.

In the absorbent article according to the present invention, the central portion corresponding to the crotch portion of the wearer's body for the purpose of separating the liquid component such as urine and the solid component such as feces back and forth in the plane of the superabsorbent composite sheet A urine / feces separation unit may be further provided. This mode is shown in FIG. FIG. 10 is a schematic view showing an example of an absorbent article according to the present invention, in which (a) shows a developed plan view thereof, and (b), (c) and (d) are lines X ₁ − X ₁ ', the line _X 2 -X _2' shows a cross-sectional view along the and line _{X 3} -X 3 '. FIG. 10 is an example in which the above-described guide sheet and urine / feces separation unit are provided, and is a schematic diagram showing an application example particularly to an absorbent body for children's diapers.

  In the absorbent article according to the present invention, the urine / feces separation unit 134 is limited in the arrangement method as long as the liquid component L and the solid component S discharged from the wearer can be separated in the plane of the superabsorbent composite sheet. There is no. In particular, as illustrated in FIG. 10, the guide sheet 132 is disposed on the front body portion of the absorbent article so as to contact the stomach side of the wearer's body, and the superabsorbent composite sheet is disposed on the back side of the wearer's body. When arrange | positioning in the back body part of an absorbent article so that it may contact, the urine / feces separation unit 134 may be arrange | positioned in the center part corresponding to a crotch part of a wearer's body.

  An aspect of the urine / feces separation unit 134 will be described with reference to FIG. FIG. 11 is a schematic diagram illustrating an embodiment of a urine / feces separation unit in the absorbent article according to the present invention.

  The urine / feces separation unit is a collective term for mechanisms related to urine / feces separation such as a urine / feces separator, a urine introduction port, and a stool introduction port that exhibit a urine / feces separation effect. As described above, the mode of the urine / feces separation unit is not limited as long as the purpose is to separate a liquid component such as urine and a solid component such as stool in the plane of the superabsorbent composite sheet. Accordingly, examples of the urine / feces separation unit include those manufactured using a known material having water resistance, such as a PE film, a laminate sheet of a PE film and a non-woven fabric, a foam sheet such as a urethane foam and a polypropylene foam. Or a spun-melt nonwoven sheet having water resistance such as SMS and SB. Moreover, you may have the material which comprises the hydrophobic surface layer of the above-mentioned high water absorption composite sheet.

  As a structure of the urine / feces separation unit 134, the mode illustrated in FIG. For example, as shown in FIG. 11A, the urine / feces separation unit 134 is configured to lift the end of the superabsorbent composite sheet 10 above the absorbent article in the vicinity of the central portion of the absorbent article. May be provided. Further, as shown in FIG. 11 (b), the urine / feces separation unit 134 inserts one end of a water-resistant urine / feces separation unit below the superabsorbent composite sheet 10, It may be provided so as to form a slide shape from the front to the rear so that the end is lifted above the absorbent article. Further, as shown in FIG. 11 (c), one end of the urine / feces separation unit is disposed on the surface of the superabsorbent composite sheet 10, and the other end of the urine / feces separation unit 134 is lifted above the absorbent article. Alternatively, it may be provided as a slide from the front to the rear. Further, as shown in FIG. 11 (d), the urine / feces separation unit 134 has an end of the superabsorbent composite sheet 10 near the center of the absorbent article, above the absorbent article, and at the back body part. It may be configured to be lifted so as to face. That is, the urine / feces separation unit 134 may be provided so that the end of the superabsorbent composite sheet 10 is bent in a key shape behind the absorbent article so that a pocket is formed in the front part. Further, as shown in FIG. 11E, the urine / feces separation unit 134 inserts one end of the water / water resistance urine / feces separation unit below the superabsorbent composite sheet 10, It may be provided so that a pocket is formed in the front part with the end directed toward the rear body part of the absorbent article, as in FIG.

  In addition, as an aspect of the urine / feces separation unit, a urine / feces separation unit as described in Patent Documents 8 and 9 that disclose a detailed description of the urine / feces separation unit such as a urine / feces separator may be used.

  Thus, in the absorbent article according to the present invention, by providing the urine / feces separation unit, liquid components such as urine and solid components such as stool are prevented from being mixed on the surface of the superabsorbent composite sheet. obtain. In particular, liquid components such as urine are easy to move on the surface of the superabsorbent composite sheet because they have fluidity, but are discharged to the front part of the absorbent article due to the water resistance of the urine / feces separation unit. It is possible to prevent the liquid component from being mixed with the solid component discharged in the back body portion of the absorbent article by guiding the liquid component in the direction in which the SAP carrying layer of the superabsorbent composite sheet is disposed.

  In addition, although demonstrated in FIG. 11 using the structure which has the high water absorption composite sheet 10 and the absorber 114 which were demonstrated in the above-mentioned FIG. 6A for the purpose of clarifying the front-back vertical relationship of the absorbent article by this invention. In the embodiment in which the urine / feces separation unit is provided in the absorbent article according to the present invention, other configurations described in the present invention may be employed. Further, in the absorbent article shown in FIG. 11, the superabsorbent composite sheet 10 is shown as being disposed only from the back body part to the central part of the absorbent article, The manner of arrangement of the sheet 10 is not limited to this, and the above-described configuration may be adopted.

In the absorbent article according to the present invention, the purpose is to reduce the water content in solid components such as relatively fluid stool such as soft stool and watery stool, and to maintain the solid component in a certain region. A feces treatment sheet may be further provided so as to be disposed above the water-absorbent composite sheet. This aspect is shown in FIG. FIG. 12 is a schematic view showing an example of an absorbent article according to the present invention, in which (a) shows a developed plan view thereof, and (b), (c) and (d) are lines X ₁ -X, respectively. Sectional views along ₁ ′, line X ₂ -X ₂ ′ and line X ₃ -X ₃ ′ are shown. FIG. 12 is an example in which the above-described guide sheet, urine / feces separation unit, and stool processing sheet are provided, and is a schematic diagram showing an application example to a child diaper absorber.

  The stool treatment sheet may be disposed in a region where the solid component can be held in a certain region. For example, as shown in FIG. You may arrange | position so that a water absorptive composite sheet may be contact | connected.

  The nature of stool or other effluent containing solid components received above the superabsorbent composite sheet varies depending on the wearer's dietary content, health status, and in the case of infants the age of the month. That is, the excrement of the wearer varies in the flow state from solid to watery, and also varies in weight and volume. In particular, if the effluent is soft stool or watery stool with a high fluidity and a moisture content of 80% or higher, various measures are necessary to properly handle such effluent. is there. Soft stools and watery stools are referred to as fluid stools. The following is a list of methods for processing fluid stool.

1) Absorb liquid components such as water contained in feces and other excrement to concentrate solid components.
2) A solid component such as fluid feces is divided and confined in a bulky porous structure so as not to move.
3) The liquid component contained in the excrement such as feces is filtered, and the solid component and the liquid component contained in the excrement are separated to concentrate the solid component.
4) A passage and space where fluid excrement such as fluid stool can be moved is secured and guided to the site to prevent leakage.

  In the present invention, the role of the stool treatment sheet is, in particular, discharged by absorbing liquid components such as water from excrement such as fluid stool and concentrating solid components such as stool as shown in 1) above. The role of either reducing the fluidity of the goods or keeping the fluidity stool itself closed so that it does not move as shown in 2) above, or at the same time exerting both the roles of 1) and 2) It may be.

  In the present invention, the material for the stool processing sheet is not particularly limited as long as it is intended to hold the solid component in a certain region as described above. In particular, as a material for a stool treatment sheet, when emphasizing the purpose of absorbing liquid components by absorbing liquid components as described in 1) above, for example, a rayon span with strong hydrophilicity and high liquid retention Examples include bulky hydrophilic nonwoven fabrics that are also used as laces, TCFs, and acquisition layers. In addition, when the purpose is to divide the solid component having fluidity and prevent it from moving up as described in 2) above, a foam having a net-like structure subjected to surface hydrophilization treatment (manufactured by INOAC) Malt filter) and flocked / raised sheets. When the purpose is to absorb liquid components such as moisture and contain fractions containing solid components such as fluid stool so that they do not move as in the combination of 1) and 2) above. May be a bulky nonwoven fabric having a multilayer structure such as Patent Documents 10 to 12 proposed by the present inventors.

  In the absorbent article according to the present invention, a solid component having a wide range of properties with different fluidity is received in the manner described with reference to FIG. The effect of preventing mixing with the liquid component is improved.

  Hereinafter, the absorbent article according to the present invention in which the above-described configurations are combined will be described.

  13 and 14 show an absorbent article employing the above-described configuration, particularly various configurations of the urine / feces separation unit. FIG. 13 is a schematic view showing an example of an absorbent article according to the present invention, where (a) shows a plan view thereof and (b) shows a cross-sectional view taken along line Y-Y ′. FIG. 14 is a schematic view showing an example of an absorbent article according to the present invention, in which (a) shows a plan view thereof, (b) shows a perspective view thereof, and (c) shows (a) ) Shows a cross-sectional view along the line YY ′ shown in FIG.

  According to FIG. 13, the absorbent article according to the present invention is disposed from the back body part corresponding to the wearer's back side to the center part corresponding to the wearer's crotch part. The end of the superabsorbent composite sheet disposed at the center of the absorbent article of the superabsorbent composite sheet is lifted above the absorbent article, and this end forms the urine / feces separation unit 134. . Further, an absorbent body 114 is disposed over the entire length of the absorbent article between the superabsorbent composite sheet 10 and the bottom leak preventer 112, and the skin contact sheet 116 is disposed between the wearer and the absorbent body 114. Has been placed.

  Moreover, according to FIG. 14, while the absorbent article by this invention is arrange | positioned from the back body part corresponding to a wearer's back side to the center part corresponding to a wearer's crotch part, the superabsorbent composite sheet 10 is located. The end of the superabsorbent composite sheet disposed in the central part of the absorbent article of the superabsorbent composite sheet is bent into the back body part of the absorbent article in a key shape, and the lower surface of the inner gather 122 and the absorbent article Combined in the width direction, this end forms a urine / feces separation unit 134. Further, a bottom leak preventer 112 and an absorber 114 are disposed below the superabsorbent composite sheet 10, and a skin contact sheet 116 is disposed between the wearer and the absorber 114. In the inner gather 122 and the outer gather 124, three 600 dtex polyurethane filaments were arranged at intervals of 5 mm.

  As a result, liquid components such as urine discharged from the wearer are absorbed by the absorbent body 114 via the skin contact sheet 116, and the SAP carrying of the superabsorbent composite sheet 10 according to the discharge amount of the liquid components. Absorption of the liquid component also occurs in the layer 16. During this series of liquid component absorption, the liquid component discharged to the front body part of the absorbent article is prevented from moving to the back body part of the absorbent article by the urine / feces separation unit 134. At the same time, solid components such as feces discharged from the wearer are received on the surface of the superabsorbent composite sheet 10 in the manner described with reference to FIG. In the absorbent article shown in FIG. 13 and FIG. 14, since the inner gather 122 is attached, there is a certain space between the wearer and the highly water absorbent composite sheet 10. The solid component received on the surface of the water-absorbent composite sheet 10 is disposed between the certain spaces. Further, the liquid component and the solid component are prevented from being mixed in the XY direction on the surface of the superabsorbent composite sheet 10 by the urine / feces separation unit 134. Therefore, the liquid component and the solid component discharged from the wearer are separated from the solid component by the absorbent article according to the present invention and absorbed into the SAP support layer, and the solid component is the high water absorption composite sheet. Receiving in the surface and tip recesses, mixing of the separated liquid component and the received solid component is prevented.

The absorbent article according to the present invention may have a plurality of superabsorbent composite sheets. FIG. 15 is a schematic view showing an example of an absorbent article according to the present invention, in which (a) shows a plan view thereof, and (b), (c) and (d) show lines X ₁ -X, respectively. ₁ ', the line X ₂ -X _2' shows a cross-sectional view along the and line Y-Y ', (e) shows a schematic plan view of a first absorber constituting the absorbent article. The absorbent article shown in FIG. 15 is particularly suitable as a urine separation diaper for children.

  According to FIG. 15, the absorbent article according to the present invention includes a bottom leak preventer 112 disposed over the entire length of the absorbent article, a second absorbent body 30 disposed thereon, and a first absorbent disposed thereon. One absorbent body 20 and a urine / feces separation unit 134 arranged so as to be folded in a central portion of the absorbent article corresponding to the wearer's crotch portion. In this absorbent article, a guide sheet 132 is disposed on the front body portion of the absorbent article corresponding to the wearer's stomach side so as to be in contact with the second absorbent body 30. As described with reference to FIG. 9, the guide sheet is disposed in contact with the highly water-absorbent composite sheet 10 in the upper part of the absorbent article, and both ends in the X direction of the guide sheet 132 are highly water-absorbent. It arrange | positions so that it may insert between the composite sheet 10 and the bottom face leak preventer 112. That is, it arrange | positions so that the 1st absorber 20 may be wrapped. Further, the skin contact sheet 116 is disposed so as to be in contact with the guide sheet in the front body part of the absorbent article and in contact with the first absorbent body in the other part of the absorbent article.

  In this absorbent article, each of the first absorbent body 20 and the second absorbent body 30 is the above-described superabsorbent composite sheet 10, and the SAP support layer constituting the superabsorbent composite sheet is composed of the absorbent body. It arrange | positions so that it may face downward of articles | goods. Therefore, the SAP carrying layer of the second absorbent body 30 is disposed so as to face the bottom leak preventer 112, and the SAP carrying layer of the first absorbent body 20 is the surface of the first absorbent body 20 on the hydrophobic surface layer side. Are arranged to face each other.

  In this absorbent article, as shown in FIG. 15 (e), the first absorbent body 20 has cuts (slits) at both ends in the width direction of the first absorbent body 20 (corresponding to the X direction of the absorbent article). Put the end of the first absorbent body inside the first absorbent body along the direction from the cut to the longitudinal end of the first absorbent body 20 (corresponding to the front body portion of the absorbent article). It has a folded structure. Therefore, at the end in the width direction of the first absorbent body 20 arranged in the front body part of the absorbent article, a two-layer structure is formed so that the SAP support layers constituting the first absorbent body face each other (see FIG. 15 (b)). With such a configuration, movement, diffusion, and absorption of liquid components such as urine are facilitated in the front body portion of the absorbent article. The use of the superabsorbent composite sheet in this manner will be described later.

  Thus, in the absorbent article according to the present invention, by arranging a plurality of superabsorbent composite sheets, the liquid component is moved, diffused, and absorbed as described with reference to FIGS. In addition, a solid component is received. Further, by disposing a plurality of superabsorbent composite sheets, the liquid component is absorbed in the SAP carrying layer of the first absorbent body through movement / diffusion on the surface of the superabsorbent composite sheet, and the absorption amount in this layer The liquid component in excess of is further absorbed and absorbed in the SAP-supporting layer of the second absorber through movement and diffusion on the surface of the second absorber. Further, in the two-layer structure formed by the SAP support layer at the end in the width direction of the first absorbent body 20, the liquid component is held in the gap between the two SAP support layers arranged so as to face each other vertically. The liquid component is absorbed in the two SAP support layers. Therefore, in addition to the proportional increase in absorption amount due to the provision of a plurality of superabsorbent composite sheets, the absorbent capacity of the superabsorbent composite sheet is synergistically increased.

  Next, an example of use of the highly water-absorbent composite sheet in the absorbent article according to the present invention will be described with reference to FIG. FIG. 16 is a schematic view showing an example of use of the superabsorbent composite sheet. In this figure, the right side of the figure corresponds to the front body part of the absorbent article, and the left side corresponds to the back body part.

  In the absorbent article according to the present invention, the superabsorbent composite sheet may be used in the same width in both the front body part and the back body part as shown in FIG. For the purpose of controlling / promoting movement / diffusion / absorption, it may be used in a modified form.

  For example, as shown in FIG. 16B, in the superabsorbent composite sheet, two slits (slits) are formed from one end portion in the length direction of the superabsorbent composite sheet along the length direction of the superabsorbent composite sheet. A band-shaped portion may be formed along the length direction from one end of the superabsorbent composite sheet by cutting. This makes it possible to change / control the movement / diffusion direction of liquid components such as urine.

  Further, as shown in FIGS. 16 (c) and (d), the superabsorbent composite sheet is cut from both ends in the width direction of the superabsorbent composite sheet toward the center of the superabsorbent composite sheet. The respective lines extending from the respective leading ends of the slits to one end portion in the length direction of the superabsorbent composite sheet along the length direction of the superabsorbent composite sheet ((c) and ( (corresponding to the dotted line d)), the end portion in the width direction of the superabsorbent composite sheet may be folded back so as to face the center portion. As shown in FIGS. 16C and 16D, the cut direction formed toward the center of the superabsorbent composite sheet is formed toward the direction corresponding to the back body portion of the absorbent article. It may be formed (corresponding to FIG. 16C) or may be formed toward the direction corresponding to the front body part of the absorbent article (corresponding to FIG. 16D). With this configuration, the SAP carrying layers face each other at both ends in the width direction of the folded superabsorbent composite sheet, and a gap is formed between the opposed SAP carrying layers.

  Moreover, as shown in FIG.16 (e), in a highly water-absorbent composite sheet, one notch | incision (slit) along the length direction of a highly water-absorbent composite sheet from the one end part of the length direction of a highly water-absorbent composite sheet And forming two slits in the direction from the leading edge of the slit toward the end in the width direction of the superabsorbent composite sheet, and the superabsorbent composite from each leading edge of the slit formed in the width direction. The superabsorbent composite sheet may be folded at each line (corresponding to (e) of FIG. 16) reaching the end in the length direction of the sheet. Also in this case, as described with reference to FIGS. 16 (c) and (d) above, the SAP carrying layers are formed at both ends in the width direction of the superabsorbent composite sheet corresponding to the front body portion of the absorbent article. Facing each other, a gap is formed between the opposing SAP carrying layers.

  By using the superabsorbent composite sheet having such a configuration, it is possible to control / promote the movement / diffusion / absorption of the liquid component in the manner described with reference to FIG.

  In FIG. 16, all are folded so that the hydrophobic surface layer is on top, but may be folded so that the SAP support layer is on top.

FIG. 17 is a schematic view showing an example of an absorbent article according to the present invention, in which (a) shows a plan view thereof, and (b), (c) and (d) show lines X ₁ -X, respectively. ₁ ', the line X ₂ -X _2' shows a cross-sectional view along the and line Y-Y ', (e) shows a schematic plan view of a first absorber constituting the absorbent article.

  According to FIG. 17, the absorbent article according to the present invention includes a bottom leak preventer 112 disposed over the entire length of the absorbent article, a second absorber 30 disposed thereon, and a second absorbent disposed thereon. One absorbent body 20 and a urine / feces separation unit 134 disposed in the central portion of the absorbent article corresponding to the wearer's crotch portion. In this absorbent article, a guide sheet 132 is disposed on the front body portion of the absorbent article corresponding to the wearer's stomach side so as to be in contact with the second absorbent body 30. In this absorbent article, the first absorbent body 20 is disposed from the back body part of the absorbent article corresponding to the wearer's back side to the central part of the absorbent article corresponding to the crotch part of the wearer. Further, the skin contact sheet 116 is disposed so as to be in contact with the guide sheet in the front body portion of the absorbent article and in contact with the first absorbent body 20 in the central portion of the absorbent article.

  With such a configuration, movement and diffusion of the liquid component occurs in the front body portion of the absorbent article according to the present invention by the guide sheet 132 and the second absorbent body 30, and the first absorbent body 20 in the rear body portion. The solid component S is received on the surface of Further, the liquid component L that has moved and diffused through the second absorbent body 30 and / or the guide sheet 132 is absorbed by the SAP support layer of the second absorbent body 30 and is disposed in the back body portion of the absorbent article. It is also absorbed by the SAP support layer of the first absorbent body 20. Thus, according to the absorbent article according to the present invention, even when a large amount of liquid component is discharged from the wearer, it is possible to suitably separate, absorb, and accept the solid component.

(Production Example 1)
A superabsorbent composite sheet was produced at a width of 1.5 m and an operating speed of 40 m / min using the materials shown in Table 1 and the apparatus shown in FIG. 20 according to the production process shown in FIG. An outline of the production will be described below.

  The configuration of the apparatus shown in FIG. 20 is as follows.

1. SMS Unlealer (SMS Unreeler (manufactured by Daisho Iron Works))
1) Model: Unwinding system with turret type automatic frame changing mechanism 2) Original fabric width: Maximum 2500mm
3) Speed: Max 100m / min 4) Winding diameter: Max φ1,200mm

2. Tissue Unlealer (Tissue Unreeler (manufactured by Daisho Iron Works))
1) Model: 2 units arranged in series, alternating single unwinding method 2) Original fabric width: Maximum 2500mm
3) Speed: Max 100m / min 4) Winding diameter: Max φ1,500mm

3. Card (Card (manufactured by Torigoe))
1) Model: 3 high-speed compact cards in series 2) Working width: 2,497mm max.
3) Weight per unit area: 20 g / m ^{2 for} regular use
4) Speed: Up to 100m / min

4). Water Jet (Water Jet)
1) Nozzle hole diameter, pitch: 0.15 mmφ × 8 mm pitch 2) Working water pressure: 6 MPa

5. Coater (Coater (made by Hirano Tech Seed))
1) Model: Two-roll type (Coating roll φ300mm)
2) Coating width: 2,400mm
3) Head control level: 100-180mm
4) Coating amount: 80 to 300 g / m ²
5) Speed: Up to 100m / min

6). Dryer (Dryer (Daichang Iron Works))
1) Ethanol drying zone (EtOH Drying Zone)
(1) Model: Steam heating cylinder dryer system (2) Atmosphere: N ₂ zone (3) Cylinder: φ3,050mm × 1 (4) Surface treatment: Teflon (registered trademark) coat 2) Moisture drying zone (Water Drying Zone) )
(1) Model: Steam heating cylinder dryer system (2) Atmosphere: Air zone (3) Cylinder: φ3,050mm × 1 (4) Surface treatment: Chrome plating 3) Cooling zone
(1) Model: Cooling water cylinder flow system (2) Atmosphere: Air zone (3) Roll: φ500mm x 3

7). Winder (Winder (made by Daisho Iron Works))
1) Model: Drum drive type surface reel 2) Original fabric width: Maximum 2500mm
3) Speed: Max 100m / min 4) Winding diameter: Max 2,000mm

First, SMS and tissue were supplied from an SMS unreeler and tissue unreeler, respectively. Next, a 20 g / m ² web made of PET fibers was created with three cards, and the laminate composed of the three layers of web / tissue / SMS was layered on top of the supplied SMS and tissue from the top. Formed. This three-layer laminate was guided onto a conveyor, a water flow was ejected at a pressure of 5 MPa, and the three-layer web was entangled up and down to be integrated. The integrated web was precoated with a mixed solvent of ethanol / water = 60/40, and then led to a roll coater type coating apparatus. A line pattern forming machine shown in FIG. 21 was inserted and used in the coating apparatus. A slurry composed of the following components is supplied to the head of the coating apparatus, and the dryness is equivalent to 150 g / m ^{2 with} a 10/5 line pattern (10 mm coated portion, 5 mm uncoated portion) as shown in FIG. The weighed slurry was coated.

MFC 0.7 part SAP 20 parts Ethanol 51.3 parts Water 28.0 parts

  Next, after dehydrating the three-layer laminate subjected to the slurry coating, the superabsorbent composite sheet having a structure as shown in FIG. 18 is obtained by removing ethanol and water and drying and winding up to a moisture content of about 10%. Got.

(Comparative Production Example 1)
In Production Example 1, a comparative sheet 1 was obtained in the same manner as in Production Example 1 except that each material shown in Table 2 was used instead of each material shown in Table 1.

(Comparative Production Example 2)
In Production Example 1, a comparative sheet 2 was obtained in the same manner as in Production Example 1 except that each material shown in Table 3 was used instead of each material shown in Table 1.

Example 1
<Water absorption / diffusion behavior test of high water absorption composite sheet>
[Measurement of absorption capacity]
The superabsorbent composite sheets obtained in Production Example 1 and Comparative Production Examples 1 and 2 and Comparative Sheets 1 and 2 were cut into a size of 10 cm × 15 cm = 150 cm ² and then washed with physiological saline (0.9% NaCl aqueous solution). The water retention amount and the water absorption amount were measured based on the tea bag method of JIS K-7223. All of these three types of sheets had an SAP loading of 150 g / m ² , and almost the same results were obtained as shown in Table 4 below.

  When these results were converted into the SAP support layer, the water retention amount was 30 mL per 1 g of SAP, and the water absorption amount was 50 mL per 1 g of SAP.

[Body fluid permeability test]
The superabsorbent composite sheets obtained in Production Example 1 and Comparative Production Examples 1 and 2 and Comparative Sheets 1 and 2 were cut into a size of 10 cm × 15 cm = 150 cm ² . Next, the SAP support layer and this acrylic plate are in contact with each other on a transparent acrylic plate arranged in a 17 cm (horizontal) × 21 cm (vertical) × 4 cm (depth) stainless steel bat as shown in FIG. As such, a superabsorbent composite sheet and each sheet were placed. From the upper surface of these sheets, 10 cc of physiological saline was dropped from the burette in about 2 seconds, and the state until the dropped liquid disappeared was visually observed. The results are shown in Table 5.

  The superabsorbent composite sheet of the present invention having both the SMS surface and the tissue surface was in a state in which saline remained on the upper surface even after 30 minutes or more had elapsed. The comparative sheet 1 having only the SMS surface had a slight permeability because a part of the fine-grained portion of the SAP component had moved to the lower surface of the SMS, and the entire amount permeated and absorbed after 5 minutes. The tissue sheet-only comparative sheet 2 immediately started to penetrate and absorb in response to dripping, and the entire amount was absorbed within 10 seconds.

[Water absorption test]
As shown in FIG. 23, 100 mL of physiological saline was added into three sets of stainless steel bats placed almost horizontally on the experimental table. With this as a stationary state, the superabsorbent composite sheet obtained in Production Example 1 and Comparative Production Examples 1 and 2 and Comparative Sheets 1 and 2 were cut into a size of 10 cm × 15 cm = 150 cm ² , and these were respectively supported by SAP. The layer was left so that it floated on the saline solution, and the time until almost 100 mL of saline solution was absorbed by the sheet was measured. The results are shown in Table 5.

  In the superabsorbent composite sheet of Production Example 1, the residual liquid in the vat almost disappeared after about 15 minutes. In Comparative Sheet 2, as in the superabsorbent composite sheet of Production Example 1, the residual liquid in the vat almost disappeared after about 15 minutes. However, in Comparative Sheet 1, some of the liquid remained in the vat after 30 minutes. Liquid remained.

  As for the state after absorption of these sheets, the superabsorbent composite sheet of Production Example 1 and the comparative sheet 2 had a uniform overall thickness, but the comparative sheet 1 had a large degree of unevenness and was not uniform. It was. In addition, in the superabsorbent composite sheet of Production Example 1 after absorption, as shown in FIG. 24, the thickness of the superabsorbent composite sheet expands to about 6 times, and a deep tunnel-like channel is formed at a site without SAP. It had been. Due to this channel formation effect, a liquid movement path can be secured even after the SAP swells, which is an extremely effective form.

[Exudability test]
When the upper surface of each sample obtained in the above [Water Absorption Test] is gently touched with a finger, the superabsorbent composite sheet of Production Example 1 is in a completely dry state, and Comparative Sheet 1 is in a dry state. The comparative sheet 2 was wet. Therefore, as shown in FIG. 25, a filter paper having a diameter of 7 cm is placed on each sample after absorption, pressed with a transparent acrylic plate, and a 200-g ring-shaped weight is placed on it, so that the liquid surface bleeds under load. Tested sex. The results are shown in Table 5.

  In the superabsorbent composite sheet of Production Example 1, no portion wetted with the filter paper was observed even after 30 minutes. In Comparative Sheet 1, many partial blots were observed after 5 minutes, but the blots did not spread even after being allowed to stand. In Comparative Sheet 2, the liquid permeated the entire filter paper after 10 seconds, and liquid oozing was observed over the entire sheet surface.

(Production Example 2)
In Production Example 1, a material for the hydrophobic surface layer shown in Table 6 was used instead of SMS, and the same SAP as in Production Example 1 was used except that the SAP had a basis weight of 200 g / m ^2. Water-absorbing composite sheets A, B and C were obtained.

(Example 2)
[Body fluid permeability test]
[Body fluid permeability test] was performed on the three types of samples of the superabsorbent composite sheets A, B and C. The results are shown in Table 7. As shown in the table, even after 30 minutes, the lower layer did not penetrate at all and no difference was observed.

[Exudability test]
As shown in FIG. 23, 100 mL of physiological saline was added into three sets of stainless steel bats placed almost horizontally on the experimental table. With this as a stationary state, the superabsorbent composite sheets A, B and C obtained in Production Example 2 were cut into a size of 10 cm × 15 cm = 150 cm ² , and these were respectively placed with the SAP support layer on the bottom. And left for 30 minutes to float on the saline solution. The surface of each sample after absorption was in a state where the touch with the finger was dry, and no difference was observed between the samples.

  For each of the superabsorbent composite sheets A, B, and C thus obtained, the above [exudability test] was performed. The results are shown in Table 8.

  As shown in this table, a difference was observed between the superabsorbent composite sheets A, B and C in the liquid absorption state of the filter paper.

This result, although it is also available in 50 mm H ₂ 0 mm, at a water pressure resistance behavior of thinking the hydrophobic surface layer under load, it is preferably 100 mm H ₂ O or more, it is 200 mm ₂ O or Further preferred.

(Production Example 3)
In the highly water-absorbent composite sheet obtained in Production Example 1, as shown in FIG. 26, the non-hydrophilic hydrophilic sheet having a width of 20 mm with an interval of 30 mm on the SMS surface, which is the hydrophobic surface layer of the highly water-absorbent composite sheet. A superabsorbent composite sheet 3 was obtained by forming a zebra pattern (striped horse) -shaped hydrophilization zone with an agent (ASA2007 manufactured by Matsumoto Yushi Seiyaku). The amount of the hydrophilizing agent used was 0.4 g / m ² . FIG. 26 shows an external view of the superabsorbent composite sheet 3.

[Body fluid permeability test]
With respect to this highly water-absorbent composite sheet 3, according to the [Body fluid permeability test], 100 cc of physiological saline was dropped on the “body fluid addition site” shown in FIG. 26 in 15 seconds.

  As a result, a part of this saline solution (about 30 mL) dropped into the stainless steel bat, but the majority (about 70 mL) moved from the hydrophilization zone to the SAP support layer, and the region other than the hydrophilization zone (in the figure) In the shaded portion, the physiological saline was present in a number of small polka dots, but in the hydrophilization zone, a uniform wet state was exhibited, and a large amount of liquid as a whole remained on the surface of the superabsorbent composite sheet 3 as it was. I didn't stay.

(Production Example 4)
Manufacture of Absorbent Article (Diaper for Children) Having Superabsorbent Composite Sheet in Rear Body Part The absorbent article shown in FIG. 6B having a superabsorbent composite sheet in the rear body part was manufactured as follows.

  As a superabsorbent composite sheet (corresponding to reference numeral 10 in FIG. 6B), a superabsorbent composite sheet having the following specifications was produced according to the method shown in Production Example 1. The superabsorbent composite sheet has the coating pattern illustrated in FIGS. 18A and 18B as described in Production Example 1.

・ Width x length: 120mm x 160mm
・ Area: 192cm ²
・ Water retention: 77 mL
・ Water absorption: 147 mL

  Next, in FIG. 6B, as an absorbent body corresponding to the reference numeral 114, SAP and wood pulp (manufactured by Rayonier) are mixed, and the upper and lower sides thereof are covered with tissue (manufactured by Oji Napier) and have the following specifications. A shaped absorber was prepared.

・ Width x length: 140mm x 380mm
・ SAP content: 5g
Pulp content: 15g
・ Water retention: 173 mL
・ Water absorption: 400mL

  Next, as a skin contact sheet corresponding to reference numeral 116 in FIG. 6B, a thermal bond nonwoven fabric (manufactured by Rengo) having the following specifications made of PE / PET (3d × 51 mm) fibers was prepared.

・ Width x length: 150mm x 200mm
・ Weight: 20g / m ²

  Next, as shown in FIG. 6B, the skin contact sheet (reference numeral 116) was superposed on the portion corresponding to the front body part of the absorber (reference numeral 114) and joined by hot melt spraying. In addition, the superabsorbent composite sheet (reference numeral 10) is superimposed on the portion corresponding to the back body part of the absorbent body so that the hydrophobic surface layer of the superabsorbent composite sheet faces the wearer's body, An absorbent main body (corresponding to reference numerals 10, 114 and 116 in FIG. 6B) of the absorbent article according to the present invention was produced. In addition, the characteristics of this absorption main body were as follows.

・ Water retention: 250mL
・ Water absorption: 547 mL

  Next, in FIG. 6B, a bottom leak preventer corresponding to reference numeral 112 was prepared by attaching a breathable film to the central portion of the SMS having the following specifications.

・ SMS (manufactured by Toray Saehan)
Basis weight: 13 g / m ²
Width x length: 330mm x 450mm
-Breathable film (polyethylene, Tokuyama)
Weight per unit area: 20 g / m ²
Width x length: 230mm x 450mm

  Next, in FIG. 6B, four 600 tex polyurethane filament yarns (manufactured by Toray DuPont) were prepared as inner gathers and outer gathers corresponding to reference numerals 122 and 124, respectively.

  Next, in FIG. 6B, as a waistband corresponding to reference numeral 126, a hook-and-loop fastener / male part provided with an elastic part, and a tape-shaped mesh nonwoven fabric / female part provided on the front surface of the front body part of the absorbent article (both are both And manufactured by Sumitomo 3M).

  Further, the absorbent main body is joined to the bottom leak preventer by hot melt, and extends in the longitudinal direction of the absorbent article at a position 3 mm from each lateral end of the bottom leak preventer. Two of the above-mentioned polyurethane filaments were arranged as described above. Further, two urethane filaments were arranged from the two polyurethane filaments at a distance of 3 mm at a position of 20 mm so as to extend in the longitudinal direction of the absorbent article. Then, these polyurethane filaments were joined by hot melt under 200% elongation, and these were folded back inside the absorbent article to form and install an inner gather and an outer gather, respectively. According to the same technique as that of a normal diaper, a female part of a hook-and-loop fastener was joined to the front of the front body, and a male with an elastic material was joined to the waist part to produce 24 absorbent articles shown in FIG. 6B.

(Example 3)
The absorbent article (four sheets) manufactured in Manufacturing Example 4 was attached to the outlet of a model doll (including an inlet for introducing a liquid and an outlet for discharging the liquid). The absorption test when this model doll was placed in the prone position and the supine position was performed as follows. The results are shown in Table 9.

-Liquid introduction method The physiological saline was supplied 3 times from the entrance by 100 mL at intervals of 10 minutes.
Observation Item After introducing 300 mL of physiological saline, the absorbent article was removed from the model doll and the absorbent article was disassembled. The following observation items were examined for the decomposed absorbent article.

-Generation | occurrence | production of leakage It was observed visually whether the physiological saline was leaking from the bottom face leak preventer of the absorbent article.
-Leakage to hydrophobic surface layer It was visually observed whether or not the introduced physiological saline remained on the surface of the hydrophobic surface layer of the superabsorbent composite sheet placed in the back body part of the absorbent article.
-Utilization state in the front body part of an absorber The area in the front body part of the absorber utilized for absorption of physiological saline was calculated by visual observation among the absorbers arranged on the entire surface of the absorbent article.
-Utilization state of the SAP carrying layer of the back body part of the absorbent article Of the superabsorbent composite sheet arranged in the back body part of the absorbent article, the area of the SAP carrying layer utilized for the absorption of physiological saline, Each of the front side, center, and rear side of the absorbent article was calculated visually.
-Change in thickness of superabsorbent composite sheet The thickness of each superabsorbent composite sheet before and after the introduction of physiological saline was measured. Moreover, the ratio of these thickness was computed.

  As a result, in the supine position, urine penetrated to the end of the back body part of the absorbent article. In particular, both the absorbent body corresponding to the reference numeral 114 and the SAP carrying layer of the superabsorbent composite sheet corresponding to the reference numeral 10 were sufficiently swollen and expanded, and the thickness increased about three times. In particular, the SAP support layer swelled until a tunnel-like channel was observed as shown in FIG.

(Example 4) <Wearing test>
The absorbent article manufactured in Production Example 3 was attached to each of four boys, two boys and two girls. After using for each name in the following manner, the following items were examined for the absorbent article after use. In addition, 5 pieces of each name were mounted / used. The results are shown in Table 10.

-Number of urine used In the absorbent article after use, the number of absorbent articles in which urine was found in any part of the absorbent article was counted.
・ Average absorption of urine For the absorbent article after use where urine was found, measure the weight of the absorbent article before use and the weight of the absorbent article after use, and the amount of urine absorbed in the absorption body The amount was measured.
-Number of occurrences of urine leakage The wearer who was using the absorbent article was visually observed, and the number of absorbent articles in which leakage was observed from the absorbent article was counted.
-Number of feces used In the absorbent article after use, the number of absorbent articles in which feces were found in any part of the absorbent article was counted.
-Number of stool leak occurrences In the absorbent article after use, the number of absorbent articles in which stool was found on the outside of the absorbent article (for example, equivalent to a bottom leak preventer) as viewed from the wearer's body was counted. .
・ Urine and stool separation state Whether or not urine and stool are separated between the front body part and the back body part of the absorbent article in the absorbent article after use in which both urine and stool are found ( Urine and feces are separated on the hydrophobic surface layer side of the superabsorbent composite sheet disposed in the back body part of the absorbent article and the SAP carrying layer side of the superabsorbent composite sheet. Whether (upper and lower separation) was observed visually.

  Analysis of the above results reveals the following.

1) Absorption and separation state of urine When the amount of urine absorption exceeds 200 mL, urine moves to the back body part of the absorbent article and forms a part of the SAP carrying layer of the superabsorbent composite sheet. It was absorbed.

  If the amount of urine absorbed exceeds 300 mL and the body is repeatedly used in a supine or recumbent position, the urine spreads over the entire SAP-supporting layer of the superabsorbent composite sheet and swells and expands. Was.

  In one absorbent article in which leakage of urine has occurred and one absorbent article in which the amount of absorption reaches 360 mL, urine is hydrophobic in the superabsorbent composite sheet disposed in the back body part of the absorbent article. It reached the surface layer and remained in the form of water droplets on the surface of the hydrophobic surface layer. In the other 18 absorbent articles, urine was disposed on the SAP carrying layer side of the superabsorbent composite sheet (10) disposed on the back body part of the absorbent article and on the front body part of the absorbent article. It remained in the absorber (114), and leaching to the surface of the back body was not recognized.

2) Stool collection and separation state Of the 20 absorbent articles after use, 13 sheets found only urine, 6 sheets both urine and stool, and 1 sheet contained only stool. It was found.

  About the absorbent article (7 sheets) after use in which both urine and feces were found, the separation state of urine and feces (front and rear separation, upper and lower separation) was observed.

  Regarding front / rear separation, in 3 out of 7 stools, the stool remained on the surface of the hydrophobic surface layer of the superabsorbent composite sheet disposed in the back body part of the absorbent article. On the other hand, in the remaining four sheets, the stool soaked up to the absorber arranged in the front body part of the absorbent article, and urine and feces were mixed in the front part of the absorbent article. Therefore, in this example, the function of separating urine and stool from front to back was partially achieved but not sufficient.

  On the other hand, regarding the upper and lower separations, all of the used absorbent articles (7 sheets) in which both urine and feces were found were used in the lower part of the superabsorbent composite sheet (SAP) arranged in the back body part of the absorbent article. No movement of feces to the carrier layer side) was observed. Therefore, the effect of separating the urine and feces from the upper and lower sides by the highly water-absorbent composite sheet was sufficiently exhibited.

(Example 5)
In the absorbent article manufactured in Production Example 3, the front end portion of the highly water-absorbent composite sheet (10) is bent toward the wearer, and both lateral ends of the front end portion are directly below the head of the inner gather (122). The stool separation unit as shown by reference numeral 134 in FIG. 13 was formed by hot melt bonding. About this absorber article | item, according to <use test> of Example 4, mounting | wearing / use was performed. The results are shown in Table 11. When the wearer defecates, the absorbent article was collected immediately after that and the above examination was performed.

  Compared with the results obtained in Example 3 for the effect of front / rear separation of urine / stool, in Example 3, front / rear separation was achieved in 3 out of 7 absorbent articles (43%), In this example, front / rear separation was achieved in 10 (83%) of the 12 absorbent articles. Therefore, it has been found that the urine / feces separation effect is greatly improved by providing the absorbent article with the urine / feces separation unit. It should be noted that the effect of separating urine and feces from the upper and lower sides was remarkable with no difference between Example 3 and this example.

(Production Example 5)
An absorbent article having a superabsorbent composite sheet having the configuration shown in FIG. 17 was produced.

[Configuration of absorbent article]
In this production example, the outline of the configuration of the absorbent article is as follows. That is, in this absorbent article, a urine / feces separation unit (134) for separating a liquid component such as urine and a solid component such as stool is disposed between the front body portion and the back body portion to absorb the liquid component. As a member to do, it has the 1st absorber (20) and the 2nd absorber (30) using the above-mentioned super absorbent composite sheet. In addition, a guide sheet (132) was disposed on the upper surface of the second absorbent body (30), and a stool processing sheet (136) was disposed on the upper surface of the first absorbent body (20).

  The absorbent article in this production example was configured such that the following members were arranged at locations corresponding to the front body part, the center part, and the back body part, respectively.

-Front body part As shown in FIG. 17 (b), the skin contact sheet (116), the guide sheet (132), and the second absorbent body (30) are arranged in this order from the wearer's body side, and on the outermost side. A bottom leak preventer (112) was placed.
-Central part As shown in Drawing 17 (d), a urine / feces separation unit (134), a skin contact sheet (116), a 1st absorber (20), and a 2nd absorber (30) in order from a wearer's body side. ) And a bottom leak preventer (112) on the outermost side. In addition, this urine / feces separation unit was disposed so as to be connected to the front end of the first absorbent body disposed in the back body part.
-Rear body part As shown in FIG. 17 (c), the feces treatment sheet (136), the first absorbent body (20), and the second absorbent body (30) are arranged in order from the wearer's body side, and A bottom leak preventer (112) was placed outside.

  Next, a method for producing each member will be described.

-1st absorber (20) and 2nd absorber (30)
The superabsorbent composite sheet produced in Production Example 1 was used as the first absorbent body and the second absorbent body.

  Specifically, as shown by reference numeral 20 in FIG. 17, the first absorbent has a hydrophobic surface such that the surface of the hydrophobic surface layer of the first absorbent is a receiving part for solid components such as feces. The layer was placed only on the back body part of the absorbent article with the body facing. In addition, as for the dimension of a 1st absorber, length is 160 mm and width is 60 mm, and a shape is a rectangle. Further, the absorption characteristics of the first absorbent body were a water absorption amount of 120 g and a water retention amount of 72 g.

  Moreover, as shown by the code | symbol 30 of FIG. 17, the 2nd absorber was arrange | positioned over the back body part from the front body part of the absorbent article with the hydrophobic surface layer of the 2nd absorber facing the body side. . Therefore, in the front body part of the absorbent article, the second absorbent body is mainly responsible for absorption of liquid components such as urine, and in the rear body part of the absorbent article, the second absorbent body is the above-mentioned first absorption. It arrange | positioned so that the SAP support layer of a body might be contact | connected. In addition, the dimension of a 2nd absorber is 360 mm in length, 80 mm in width, and a shape is a rectangle. Further, the absorption characteristics of the second absorbent body were a water absorption amount of 360 g and a water retention amount of 216 g.

  In addition, the SAP carrying layers of these first absorbent body and second absorbent body are distributed in a line shape with a dimension of about 10 mm as shown in FIG. 18 and the SAP coat layers are spaced at intervals of about 5 mm. Arranged. Therefore, the portion where the SAP coat layer does not exist is configured to expose the PET web layer web layer. Further, the lines of the SAP carrying layers of the first absorbent body and the second absorbent body were arranged so as to be substantially parallel to the direction from the front body portion to the back body portion of the absorbent article.

・ Guide sheet (132)
As a guide sheet, an aperture film made of PE (manufactured by Tredegar) subjected to surface hydrophilization treatment was used. The shape is a horizontally long rectangle of 50 mm in length and 80 mm in width.

  As indicated by reference numeral 132 in FIG. 17, this guide sheet was disposed so as to be in contact with the surface of the hydrophobic surface layer of the second absorbent body. Therefore, the guide sheet is disposed in the front body portion of the absorbent article and plays a role of mainly absorbing liquid components such as urine.

・ Urine / feces separation unit (134)
As a material for the urine / feces separation unit, a laminate of SMS (manufactured by Toray Saehan, weight per unit of 13 g / m ² ) and PE film (LLDPE) (manufactured by Mitsui Chemicals) was used. The shape of the urine / feces separation unit was 20 mm in length and 80 mm in width, and the length of the folded portion of the Z-folded portion was 20 mm.

  This urine / feces separation unit was joined to the hydrophobic surface layer at the front end portion of the first absorbent body by hot melt as shown in FIG. 11 (c). Moreover, the both ends of the horizontal direction of the urine / feces separation unit were joined to the side edge band by hot melt. Thereby, the contact state to a wearer's perineum part is always maintained.

With this configuration, the urine / feces separation unit is disposed so as to contact the center of the wearer's crotch, between the urine outlet and the anus, and the perineum. Moreover, since this urine / feces separation unit has a Z-shaped folding structure in the front / rear direction of the absorbent article, the upper surface portion of the urine / feces separation unit is brought into contact with the wearer's perineum at the time of wearing or after defecation. A three-dimensional structure capable of securing the depth of the receiving portion of the solid component S such as feces composed of the hydrophobic surface layer of the first absorbent body while maintaining the state is formed. In addition, when the receivable volume of the solid component receiving portion composed of the hydrophobic surface layer and the side edge bands on both sides is measured, a volume of about 200 mL is applied under pressure without being loaded with the solid component. Even (0.6 kg / cm ² ) has a volume of about 80 mL.

・ Stool processing sheet (136)
As a material for the stool treatment sheet, a bulky air-through nonwoven fabric (made by Kuraray Co., Ltd., PE / PET, basis weight 30 g / m ² ) having a thickness of 1.5 mm under no load was used. The stool processing sheet has a rectangular shape with a length of 160 mm and a width of 50 mm.

  This stool treatment sheet was superposed on the surface of the hydrophobic surface layer of the first absorbent body and joined in a line by hot melt.

  By comprising in this way, a stool processing sheet | seat is arrange | positioned in the back body part of an absorber article | item, and functions as a receiving part of solid components, such as stool here.

-Side edge band As a material of the side edge band, a spun bond (manufactured by Toray Saehan) was used. A urethane filament (620 tex, manufactured by Toray DuPont) was used for the stretchable portion of the side edge band.

  This side edge band was connected along the front-rear direction of the absorbent article to a bottom leak preventer disposed at the lateral end of the absorbent article. Thereby, in the both ends of the horizontal direction of an absorber article, a belt-like elastic part will be constituted. In addition, the expansion / contraction rate of the side edge band is 200% in the front-rear direction of the absorbent article, and the dimensions of the side edge band are 360 mm in length (when contracted) and 20 mm in width.

・ Other members For the purpose of attaching the absorbent article to the wearer, an existing elastic band (diaper (trade name: Mooneyman Big size, made by Unicharm)) is used as the waist part. The product was cut out and attached to the bottom leak preventer of the absorbent article.

  The above members were assembled so as to have the configuration shown in FIG. 17, and an absorbent article in this production example was produced.

(Example 6)
With respect to the absorbent article produced in Production Example 5, the amount of water absorption and the amount of water retained were measured in accordance with the provisions of “Test method for absorption amount of superabsorbent resin” in JIS K7223-1996.

  Specifically, with respect to the amount of water absorption, after absorbing the absorbent article in a bat for 20 minutes by immersing it in physiological saline, and then allowing it to stand on a stainless steel wire net for 5 minutes, removing the dripping physiological saline, The weight was measured.

  Further, the water retention amount was measured by measuring the water absorption amount and then dehydrating the absorbed absorbent article by centrifuging at 1,000 G for 10 minutes.

  As a result, the water absorption amount was 480 g, and the water retention amount was 288 g.

  Furthermore, the thickness in the center part of the front body part and the center part of the back body part of the absorbent article was measured before and after the physiological saline was absorbed as described above. Specifically, in the vicinity of the center of the front body portion of the absorbent article having the second absorbent body, the guide sheet, and the skin contact sheet, and the absorbent article having the second absorbent body, the first absorbent body, and the stool treatment sheet 136 The thickness was measured near the center of the back body part. The results are shown in Table 12. The thickness of one superabsorbent composite sheet used as the first absorber and the second absorbent was 1.1 mm, and the thickness of the two superabsorbent composite sheets was 2.3 mm. .

  As a result, the thickness of the central part of the front body part increased 4.5 times before absorption (2.9 mm) and after absorption (13.0 mm). Moreover, the thickness of the center part of the back body part increased 6.2 times before absorption (3.9 mm) and after absorption (24.0 mm). Thus, the thickness increased dramatically before and after the absorption because the SAP carrying layer of the superabsorbent composite sheet placed in the front body part and the back body part of the absorbent article used in this example swelled. This is due to Moreover, the value of swelling of the absorbent article observed in this way was close to twice the value obtained when the SAP support layer configured in combination with the pulp layer observed in Example 3 was used. .

(Example 7) <Wearing test>
The following items were examined by attaching the absorbent article produced in Production Example 5 to healthy infants (2 boys, 3 girls, 5 in total) having normal urination and defecation functions.

-Number of sheets used Among the mounted absorbent articles, the number of absorbent articles in which urine and feces were observed in any member of the absorbent article was counted. As a result, urine was observed in all (15) of the attached absorbent articles. In addition, stool was observed in five of the attached absorbent articles.
-Average wearing time The average value of the time when the infant wears the absorbent article was calculated.
-Average absorption amount The average value of the values obtained by subtracting the weight of the absorbent article before wearing was calculated from the weight of the absorbent article after wearing. Therefore, the value shown here corresponds to the total mass of effluent from the wearer observed in the absorbent article.
-Number of leaked urine The wearer in use was visually observed, and the number of absorbent articles in which leakage was observed from the absorbent article was counted.

  In addition, as described above, the main positions of the wearer wearing the absorbent article during wearing (standing position, sitting position, prone position, supine position and lying position) were examined. Further, the absorbent article after being mounted as described above was disassembled, and the urine absorption state of the first absorbent body and the second absorbent body after the mounting was observed. In particular, the second absorbent body after wearing was equally divided into parts corresponding to the front body part, the central part and the back body part of the absorbent article, and the urine absorption state was observed for each part. As an index for observation, 100% is urine diffused on the entire surface, 50% is diffused about half, and 20% is hardly diffused. Each part of the absorber was sensorially evaluated. The results of the examination / evaluation in this way are classified according to the main posture of the wearer who is wearing them, and the results are shown in Table 14.

Summarizing the above results, the following became clear.
(1) Urine did not leak outside the absorbent article in any posture.
(2) It was found that the urine was distributed over a wide range, and the absorber was used more efficiently, regardless of the position of the body during wearing. This is considered to be due to the result that liquid components such as urine were widely distributed by the second absorbent body combined with the guide sheet.
(3) The flow of liquid components from the wearer's crotch part corresponding to the center part of the absorbent article to the back body part occurs not only in the supine position, which is relatively easy to move to the back body, but also in the standing position, sitting position, etc. It was found that the absorption was sufficiently performed.
(4) The surface of the guide sheet after mounting was not moist, and all the excreted liquid was absorbed and immobilized on the second absorbent body and / or the first absorbent body composed of the superabsorbent composite sheet.
(5) The liquid distributed at the guide sheet portion and flowing to the back body portion was absorbed not only by the second absorbent body but also by the first absorbent body. Moreover, thickness changed in the 1st absorber after absorption and the 2nd absorber. These phenomena are caused by the absorption of the liquid component, whereby the SAP support layer constituting the first absorber and the second absorber swells and expands, and a line-like void is formed at a site where these layers are adjacent to each other. This is considered to be due to the fact that the gap became a flow path for the liquid component. As a result, by forming this flow path, liquid components such as urine discharged to the front body part of the absorbent article are not only the SAP support layer disposed in the front body part but also the back of the absorbent article. It is considered that the second absorbent disposed in the body part and the SAP support layer of the first absorbent were also absorbed.
(6) The skin near the urination opening was always kept dry.

  In addition, among the absorbent articles after wearing, the five absorbent articles in which stool was observed were examined for each item shown in Table 13 in addition to the following “stool type” items. The results are shown in Table 15.

-Types of stool The stool found in the absorbent article after being mounted was observed as a normal stool or a soft stool by visual observation during use and visual observation after use, and the number of sheets was counted.

  Further, the five absorbent articles in which stool was found in the mounted absorbent article were disassembled, and the places where the stool was received were observed. For each wearer, the following items were examined together with the locations where this stool was received. The results are shown in Table 16.

-Main body posture Each wearer wearing the absorbent article observed the different body postures taken during wearing, standing, sitting, prone, supine and lying.
-Stool type It was visually observed whether the stool found in the absorbent article was normal or soft.
-Stool acceptance location It was visually observed which stool was found in the absorbent article.
-Stool amount The amount of stool found in the absorbent article after wearing was sensoryly evaluated.
・ Body dirt The part of the wearer after wearing was visually observed to see which part of the wearer was dirty with stool.

  As a result, it was found that all the stool receiving places were received on the stool processing sheet disposed in the back body part of the absorbent article, regardless of the state of stool such as normal stool or soft stool. Moreover, the wearer's body stains after wearing were found throughout the anus and buttocks, and no stool stains were found around the testicles and penis. This means that dirt was found behind the perineum, and the urine / feces separation unit placed in the absorbent article separated the urine and feces, especially the feces moved to the front body part. Indicates that is blocked. Furthermore, in Example 5, stool leakage was observed, but in this example, it was not observed at all, and in the absorbent article in which soft stool was found, the flow of stool received in the stool treatment sheet Sex was almost lost. These are considered to be because the liquid component contained in the stool was absorbed by the stool processing sheet, and the stool that lost its fluidity was accepted by the stool processing sheet, and the stool leakage was suppressed. . Moreover, in all the absorbent articles in which stool was found, the stool was received by the stool processing sheet of the absorbent article. This is considered to be because the volume constituting the stool receiving portion is increased by adopting the urine / feces separation unit having a Z-fold structure.

  On the other hand, in the absorbent article in which urine was observed, no urine was found on the surface of the hydrophobic surface layer of the first absorbent body arranged in the back body part of the absorbent article. Moreover, in the absorbent article in which stool was observed, no stool was observed on the surface of the skin contact sheet, the guide sheet, and the second absorbent body arranged in the front body part of the absorbent article. These results are considered to be due to the fact that the urine / feces separation unit provided in the absorbent article used in this example prevented the movement of urine in the front-rear direction.

(Production Example 6)
In Production Example 5, an absorbent article was produced in the same manner as in Production Example 5 except that no guide sheet was used.

(Example 8)
About healthy infants (2 boys, 3 girls, 5 people in total) with normal urination function and defecation function, the absorbent article produced in Production Example 6 was attached, and for each item shown in Table 13, The examination was performed in the same manner as in Example 7. The results are shown in Table 17.

  As a result, urine was observed in all (15) of the attached absorbent articles. In addition, stool was observed in four of the attached absorbent articles.

  In addition, for each item shown in Table 14, for each item shown in Table 14 for eight absorbent articles in which the main body position of the wearer who is wearing is clear among the mounted absorbent articles. In the same manner as in Example 7, examination was made. The results are shown in Table 18.

  These results are summarized as follows.

(1) The number of urine leaks was 2 out of 15 absorbent articles in which urine was found.
(2) The use state of the absorbent body was generally distributed over the entire region as compared with a normal diaper. However, when compared with the results obtained with the absorbent article of Example 5 provided with the guide sheet, the use state of each absorbent body of the first absorbent body and the second absorbent body is biased as a whole, and the first absorbent body The situation of use also got worse.
(3) It was found that the use state of each absorber was poor particularly when mounted in the lying position.
(4) On the surface of the front body part of the second absorbent body, the remaining liquid was accumulated in some polka dots.

  From these facts, the absorbent article used in this example is practically not at a particularly problematic level, but compared to the absorbent article used in Example 5, in terms of the state of use of each absorber. Differences were noted. This difference is probably due to the presence or absence of the guide sheet.

(Comparative Example 1)
For the purpose of confirming the effect of the hydrophobic surface layer of the superabsorbent composite sheet according to the present invention, in Production Example 5, the first absorbent body (20) is prepared such that the SAP carrying layer is disposed on the wearer's body side. Except that, it was produced in the same manner as in Production Example 5 to obtain 5 comparative absorbent articles. The feces treatment sheet (136), the first absorbent body (20), and the second absorbent body (30) are arranged in this order from the wearer's body side on the back body part of the comparative absorbent article thus produced. A bottom leak preventer (112) was disposed on the outermost side. Therefore, the SAP carrying layer of the first absorbent body (20) comes into contact with the stool processing sheet.

  This comparative absorbent article is worn and used by a healthy infant (one boy) with normal urination and defecation functions. About the comparative absorbent article after use, urine absorption amount and occurrence of urine leakage Presence / absence and location of occurrence, stool acceptance state on the hydrophobic surface layer of the second absorbent body and wet state on the surface of the hydrophobic surface layer, and presence / absence and degree of SAP adhesion to the stool treatment sheet and the wearer were observed. The results are shown in Table 19.

  As a result, among the five comparative absorbent articles, four were used only for urine, and one was used for urine and stool. In order of increasing urine absorption, No. 1 to No. It was set to 5. No. used for stool In 2, the stool was received in the hydrophobic surface layer of the second absorber.

  From this result, the following became clear.

(1) Urine leakage occurred in three of the five comparative absorbent articles after use. This is presumed that the liquid absorption of the SAP support layer of the first absorber is small.
(2) In the three comparative absorbent articles in which urine leakage occurred, the liquid leached to the surface of the second absorbent body.
(3) In particular, no. 4 and no. In No. 5, the overflowing urine was absorbed by the SAP carrying layer of the second absorber.
(4) When the SAP of the SAP carrying layer swells, SAP particles adhere to the skin and cannot be used.

  From these results, it is considered that when the SAP support layer is disposed on the wearer's body side, the product function cannot be exhibited.

It is a figure which shows an example of the high water absorption composite sheet by this invention. It is a figure which shows an example of the high water absorption composite sheet by this invention. In the superabsorbent composite sheet according to the present invention, it is a plan view showing an example having a liquid permeation zone. In the superabsorbent composite sheet according to the present invention, it is a plan view showing an example having a liquid permeation zone. In the superabsorbent composite sheet according to the present invention, it is a plan view showing an example having a liquid permeation zone. In the superabsorbent composite sheet according to the present invention, it is a plan view showing an example having a liquid permeation zone. In the superabsorbent composite sheet according to the present invention, it is a plan view showing an example having a liquid permeation zone. In the superabsorbent composite sheet according to the present invention, it is a plan view showing an example having a liquid permeation zone. In the superabsorbent composite sheet according to the present invention, it is a plan view showing an example having a liquid permeation zone. In the superabsorbent composite sheet according to the present invention, it is a plan view showing an example having a liquid permeation zone. In the superabsorbent composite sheet according to the present invention, it is a plan view showing an example having a liquid permeation zone. It is the schematic which shows an example of the absorbent article by this invention, Comprising: (a) shows the top view, (b) shows sectional drawing along line Y-Y '. It is the schematic which shows an example of the absorbent article by this invention, Comprising: (a) shows the top view, (b) shows sectional drawing along line Y-Y '. In the absorbent article according to the present invention, it is a partial schematic diagram for explaining the movement and diffusion of the liquid component on the surface of the superabsorbent composite sheet, the left side of the figure shows the plan view, the right side of the left figure Sectional drawing along the double-headed arrow xx is shown. In the absorbent article by this invention, it is an enlarged schematic diagram explaining the relationship between reception of the solid component in the surface of a highly water-absorbent composite sheet, and absorption of a liquid component. A schematic diagram showing an example of the absorbent article according to the present invention, (a) shows the planar development view, (b) and (c), respectively lines X ₁ -X 1 _'and line X ₂ - It shows a cross-sectional view along the X 2 _'. A schematic diagram showing an example of the absorbent article according to the present invention, (a) shows the planar development view, (b), (c) and (d) are respectively lines _X 1 -X ₁ ', It shows a cross-sectional view taken along the line _X 2 -X ₂ 'and the line _{X 3} -X 3'. In the absorbent article by this invention, it is the schematic explaining the aspect of a urine / feces separation unit. A schematic diagram showing an example of the absorbent article according to the present invention, (a) shows the planar development view, (b), (c) and (d) are respectively lines _X 1 -X ₁ ', It shows a cross-sectional view taken along the line _X 2 -X ₂ 'and the line _{X 3} -X 3'. It is the schematic which shows an example of the absorbent article by this invention, Comprising: (a) shows the top view, (b) shows sectional drawing along line Y-Y '. It is the schematic which shows an example of the absorber article | item by this invention, Comprising: (a) shows the top view, (b) shows the perspective view, (c) shows the line Y shown to (a). Sectional drawing along -Y 'is shown. A schematic diagram showing an example of the absorbent article according to the present invention, (a) shows a plan view thereof, (b), (c) and (d) are respectively lines _X 1 -X ₁ ', the line X 2 _-X 2 _'and the line Y-Y' shows a cross-sectional view along the, (e) shows a schematic plan view of a first absorber constituting the absorbent article. It is the schematic which shows the usage example of a super absorbent composite sheet. A schematic diagram showing an example of the absorbent article according to the present invention, (a) shows a plan view thereof, (b), (c) and (d) are respectively lines _X 1 -X ₁ ', the line X 2 _-X 2 _'and the line Y-Y' shows a cross-sectional view along the, (e) shows a schematic plan view of a first absorber constituting the absorbent article. It is the schematic of the highly water-absorbing composite sheet obtained in Production Example 1, wherein (a) shows a plan view thereof, and (b) shows a cross-sectional view along line X-X ′. It is a block diagram which shows the outline of the manufacturing process of a highly water-absorbent composite sheet. It is the schematic of the apparatus used for manufacture of a highly water-absorbing composite sheet. It is the schematic which shows the line pattern molding machine with which the coater of the apparatus shown in FIG. 20 was mounted | worn, Comprising: (a) shows the front sectional view and top view of a root part, (b) is the front sectional view of a front-end | tip part. (C) shows a top view of the tip, (d) shows a cross-sectional view of the root, (e) shows a cross-sectional view of the tip, and (f) shows a completed assembly drawing. Show. It is the schematic which shows the structure of the apparatus used for the bodily fluid permeability test. It is the schematic which shows the aspect of a water absorption test. It is the schematic which shows the change before and behind water absorption in a highly water-absorbing composite sheet, (a) shows the thing before absorption, (b) shows the thing after absorption. It is the schematic which shows the structure of the apparatus used for the oozing property test. The schematic diagram of the superabsorbent composite sheet used in Production Example 3 is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Super absorbent composite sheet 12 Hydrophobic surface layer 14 Absorption diffusion layer 16 SAP carrying | support layer 20 1st absorber 22 Surface diffusion layer 24 Liquid permeation zone 30 2nd absorber 100 Absorbent article 112 Bottom surface leak preventer 114 Absorber 116 Skin contact sheet 122 Inner gather 124 Outer gather 126 West band 128 Bundling part 132 Guide sheet 134 Urine / feces separation unit 136 Stool processing sheet L Liquid component S Solid component

Claims (15)

An SAP support layer having the ability to absorb liquid components;
An absorbent diffusion layer having hydrophilicity, laminated on the SAP support layer;
A water-resistant hydrophobic surface layer having liquid impermeability , laminated on the absorption diffusion layer;
A superabsorbent composite sheet having
The superabsorbent composite sheet, wherein the SAP support layer, the absorption / diffusion layer, and the hydrophobic surface layer are integrated. _{2. The} superabsorbent composite sheet according to claim 1, wherein a water pressure resistance of the hydrophobic surface layer is 50 mmH ₂ O or more. 3. The superabsorbent composite sheet according to claim 1, wherein a water pressure resistance of the hydrophobic surface layer is 100 mmH ₂ O or more.   The superabsorbent composite sheet according to any one of claims 1 to 3, further comprising a hydrophilic and liquid-permeable surface diffusion layer on the surface of the hydrophobic surface layer.   The superabsorbent composite sheet according to any one of claims 1 to 4, wherein the hydrophobic surface layer has a liquid permeation zone.   6. The superabsorbent composite sheet according to claim 5, wherein the liquid permeation zone has an opening shape.   The superabsorbent composite sheet according to claim 5, wherein the liquid permeable zone has a slit shape.   The superabsorbent composite sheet according to claim 5, wherein the liquid permeation zone has been subjected to a hydrophilic treatment with a surfactant. A bottom leak preventer having liquid impermeability disposed away from the wearer's body;
An absorbent article comprising the superabsorbent composite sheet according to any one of claims 1 to 8, which is disposed on the body side of the wearer from the bottom leak preventer,
The absorbent article, wherein the superabsorbent composite sheet is disposed such that the surface of the hydrophobic surface layer faces the wearer's body.   The absorbent article according to claim 9, further comprising an absorbent body capable of absorbing a liquid component between the superabsorbent composite sheet and the bottom leak preventer.   The high water-absorbing composite sheet is disposed only from a back body portion corresponding to the back side of the wearer's body to a central portion corresponding to the crotch portion of the wearer's body. The absorbent article according to 9 or 10.   The absorbent article according to any one of claims 9 to 11, further comprising a guide sheet having liquid permeability so as to be in contact with the surface of the superabsorbent composite sheet.   The absorbent article according to claim 12, wherein the guide sheet is disposed only in a front body portion of the absorbent article.   The absorbent article according to any one of claims 9 to 13, further comprising a urine / feces separation unit at a central portion corresponding to a crotch portion of the wearer's body.   The absorbent article according to any one of claims 9 to 14, further comprising a stool treatment sheet so as to be disposed above the superabsorbent composite sheet.

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