JP7078433B2 - Pants type disposable wear items - Google Patents

Description

The present invention relates to a pants-type disposable wear article.

Pants-type disposable items such as pants-type disposable diapers are an integral exterior body extending from the front body to the back body, or an exterior body separately provided on the front body and the back body, and an intermediate portion in the width direction of the exterior body. A side seal part where both sides of the exterior body in the front body and both sides of the exterior body in the back body are joined, a waist opening and a pair of left and right legs. It is generally provided with an opening.

In general pants-type disposable wear items, the exterior body elastically expands and contracts in the width direction to the waist circumference area corresponding to the side seal portion in the front-rear direction and the intermediate region located between the front-back waist circumference areas. It has an elastic structure. A typical example of this elastic structure is provided with an elongated elastic member provided between a plurality of laminated nonwoven fabric layers along the expansion / contraction direction and at intervals from each other. The non-woven fabric layer forms a planar stretchable region and also plays a role of covering and hiding the elastic member, and the elastic member incorporated between the non-woven fabric layers plays a role of generating a force for elastic stretch. In the stretched state of the elastic member, at least the portions located at both ends of the stretchable region are fixed to the nonwoven fabric layers adjacent to both the front and back sides of the elastic member. By this fixing, the elastic member and the non-woven fabric layer are integrated, and the non-woven fabric layer contracts due to the contraction force of the elastic member and folds (including wrinkled ones. Not only in the natural length state but also in the stretched state of the elastic member. It is formed. Hereinafter, it is also simply referred to as a fold), and when it is extended from this contracted state against the contraction force of the elastic member, the fold is developed. Normally, the non-woven fabric layer is in a developed state without folds at the elastic elongation limit, and the folds are displaced as the elastic member contracts, and the folds are most densely displaced in the natural length state.

In such a stretchable structure, if a plurality of laminated non-woven fabric layers are free from each other, one non-woven fabric layer may partially or wholly float with respect to the other non-woven fabric layer, resulting in unnecessary folds and bulges. Therefore, the non-woven fabric layer needs to be directly or indirectly joined over almost the entire surface. Further, since the elastic member creates elasticity, the elastic member extends over the entire stretchable region in the stretchable direction, and at least the portions located at both ends of the stretchable region in the stretchable direction are fixed to the non-woven fabric layer. In the natural length state, the non-woven fabric layer needs to be shrunk as the elastic member shrinks. That is, it is necessary to join the layers of the nonwoven fabric and fix the elastic member to the nonwoven fabric layer.

At present, a hot melt adhesive is selected as a means for fixing the elastic member to the non-woven fabric layer in most cases. On the other hand, in order to reduce the amount of hot melt adhesive used, the bonding form between the layers of the non-woven fabric is often performed by welding such as ultrasonic welding, but the form performed by hot melt adhesive is also strongly used. ing. For example, by joining the non-woven fabric layers adjacent to both the front and back sides of the elastic member via a hot melt adhesive at the passing position of the elastic member, the non-woven fabric layer can be joined and the elastic member can be fixed to the non-woven fabric layer. In addition, adjacent non-woven fabric layers are joined via a hot melt adhesive that is intermittently arranged in the expansion and contraction direction, and is intermittently arranged in the direction orthogonal to the expansion and contraction direction. Further, a form of joining adjacent nonwoven fabric layers via a hot melt adhesive which is substantially continuous in the expansion and contraction direction is known. (See Patent Documents 1 to 6)

On the other hand, in the pants-type disposable wear item, the waist side edge of the interior body is separated from the waist portion of the exterior body to the crotch side to some extent, and the separation region between the waist portion and the waist opening side edge of the interior body. Is formed. This separation area is often the part that the fingertips hit, among the parts that are grasped by hand when wearing the pants-type disposable wear item. That is, when wearing a pants-type disposable wear item, the portion including the waist portion is grasped by hand, the leg is passed through the leg opening, and then the leg is pulled up to the waist.

However, in the above-mentioned separation region, a large number of holes may be formed in at least one non-woven fabric layer. For example, in a pants-type disposable wear article, it is known that at least one layer of the non-woven fabric layer is provided with a hole penetrating in the thickness direction mainly for improving air permeability (see, for example, Patent Documents 7 to 9).

Further, the waist circumference region and the intermediate region overlap with the front-rear direction range having the absorber, and there are internal and external fixing portions for fixing the interior body to the exterior body in the range. Therefore, even if the elastic member is provided so as to cross the range in the front-rear direction having the absorber, its expansion / contraction function is limited by the rigidity of the absorber. In addition, the absorber may shrink in the width direction to deteriorate the wearing feeling and appearance, or the absorber may be twisted or cracked to deteriorate the absorption performance. For this reason, conventionally, elastic members are continuously attached along the width direction, and almost the entire portion overlapping the absorber is cut into small pieces (see, for example, Patent Documents 1, 4, and 5). ). When cutting such an elastic member, holes may be formed in at least one layer of the non-woven fabric layer in the above-mentioned separated region by cutting or melting.

In this way, when a large number of holes are formed in the non-woven fabric layer in the separated area where the fingertips easily hit, the portion including the waist portion is grasped by hand, the leg is passed through the leg opening, and then the waist is pulled up. In some cases, the non-woven fabric layer in the separated region was torn (including the case where only a part of the layers were torn and the case where all the layers were torn). This is because the presence of the pores reduces the strength of the nonwoven fabric layer having the pores, and thus the strength of the separated region.

Japanese Unexamined Patent Publication No. 2004-229857 Japanese Unexamined Patent Publication No. 2013-132331 Japanese Unexamined Patent Publication No. 2014-207973 Japanese Unexamined Patent Publication No. 2017-064126 Japanese Unexamined Patent Publication No. 2017-064133 Japanese Unexamined Patent Publication No. 2017-164034 Japanese Unexamined Patent Publication No. 2015-107223 Japanese Unexamined Patent Publication No. 2015-128573 JP-A-2015-192862

Therefore, a main object of the present invention is to make it difficult for the nonwoven fabric layer in the waist circumference region of the exterior body to be torn.

The pants-type disposable wear items that have solved the above problems are as follows.
<First aspect>
An integrated exterior body from the front body to the back body, or an exterior body separately provided on the front body and the back body,
The interior body that extends to both the front and back of the crotch part attached to the middle part in the width direction of this exterior body,
Side seals where both sides of the exterior body on the front body and both sides of the exterior body on the back body are joined, respectively.
With a waist opening and a pair of left and right leg openings,
The exterior body has a waist circumference region that is a range in the front-rear direction corresponding to the side seal portion.
The waist circumference region has a plurality of laminated nonwoven fabric layers and an elongated elastic member provided between the nonwoven fabric layers.
The waist circumference region is located at the edge of the waist opening, the waist portion having the elastic member, the lower waist portion located on the crotch side of the waist portion, and the waist portion and the edge of the interior body on the waist opening side. Has a separation region formed between and
In pants-type disposable wear items
At least one layer of the nonwoven fabric layer in the separated region is provided with holes penetrating in the thickness direction at intervals in the width direction.
The exterior body in the region where the exterior body and the interior body overlap at least one of the front body and the back body is provided with a display sheet having a display visible from the outer surface.
The display sheet at least one of the front body and the back body extends from the region overlapping with the interior body to the waist opening side from the center in the front-rear direction of the separation region.
Pants-type disposable wear items that are characterized by that.

(Action effect)
The feature of this pants-type disposable wear item is that the display sheet provided on the outside of the interior body is used to reinforce the part that the fingertips touch when worn. That is, since the display sheet of this article extends from the center in the front-rear direction to the waist opening side of the separation region, the portion where the fingertips touch is reinforced at the time of mounting or the like, and the non-woven fabric layer in the separation region is less likely to be torn.

<Second aspect>
The hole has a width direction dimension of 1.2 mm or less, and a front-back direction dimension is 1 to 2 times a width direction dimension.
The pants-type disposable wear item of the first aspect.

(Action effect)
Most of the tears in the non-woven fabric layer in the waist circumference area due to grasping the exterior body by hand are lateral tears (tears along the width direction). Therefore, by shortening the dimension in the width direction of the hole as in this embodiment, it is possible to prevent such lateral tearing from occurring. On the other hand, by making the dimension in the front-rear direction of the hole sufficiently longer than the dimension in the width direction of the hole (that is, making it vertically long), the significance of forming the hole can be made sufficient.

<Third aspect>
The width dimension of the hole is 0.3 to 5.0 mm, and the width direction dimension is 1.2 to 2.5 times the front-back dimension.
The pants-type disposable wear item of the first aspect.

(Action effect)
As described above, most of the tears in the non-woven fabric layer in the waist circumference area due to grasping the exterior body by hand are lateral tears (tears along the width direction). If the shape of the hole is a horizontally long shape as in this embodiment, lateral tearing is particularly likely to occur. Therefore, the extension of the display sheet to the waist opening side is particularly significant in the case of this embodiment.

<Fourth aspect>
The holes are arranged in a matrix in which rows of holes linearly arranged at intervals in the front-rear direction are repeated at intervals in the width direction.
The widthwise spacing of the rows of holes is narrower than the anteroposterior spacing of the holes.
Pants-type disposable wearable article according to any one of the first to third aspects.

(Action effect)
As described above, most of the tears in the non-woven fabric layer in the waist circumference area due to grasping the exterior body by hand are lateral tears (tears along the width direction). Here, if the arrangement of the holes is a matrix arrangement as in this embodiment and the spacing in the width direction of the rows of holes is narrower than the spacing in the anteroposterior direction of the holes, lateral tearing is particularly likely to occur. Therefore, the extension of the display sheet to the waist opening side is particularly significant in the case of this embodiment.

<Fifth aspect>
An area of 80% or more of the display sheet is adhered to at least one layer of the nonwoven fabric layer via a hot melt adhesive.
Pants-type disposable wearable article according to any one of the first to fourth aspects.

(Action effect)
Even if the display sheet is provided, the strength can be improved by increasing the number of laminated fabrics, so that it is basically difficult to tear. However, in order to further improve the strength, it is sufficiently large as in this embodiment. It is preferable to bond the display sheet and at least one layer of the non-woven fabric layer by the bonding area.

<Sixth aspect>
The width of the display sheet is 50 to 100% of the width of the interior body.
Pants-type disposable wearable article according to any one of the first to fifth aspects.

(Action effect)
The width of the display sheet is not particularly limited, but if it is too narrow, the tear suppressing effect will be poor, and therefore it is preferably within the range of this embodiment.

<Seventh aspect>
The display sheet is a crepe paper having a tensile strength of 19 to 30 N / 25 mm in the width direction and a tensile strength of 4 to 10 N / 25 mm in the front-rear direction.
Pants-type disposable wearable article according to any one of the first to sixth aspects.

(Action effect)
The material and strength of the display sheet are not particularly limited, but those within the range of this embodiment are preferable because they are excellent in printability, strength and cost of the display content.
<Eighth aspect>
The nonwoven fabric layer constituting the skin-side surface in the separated region is a nonwoven fabric layer having the pores.
Pants-type disposable wearable article according to any one of the first to seventh aspects.

(Action effect)
When grasping the exterior body by hand, the thumb often contacts the outer surface of the waist area, and the other fingers often contact the skin surface of the waist area, and when pulling up the disposable wear item, the skin surface is wider. In many cases, a stronger force is applied. Therefore, in the case of this embodiment, the non-woven fabric layer in the waist circumference region is likely to be torn. Therefore, the extension of the display sheet to the waist opening side is particularly significant in the case of this embodiment.
<Ninth aspect>
The non-woven fabric layer having the holes is a perforated non-woven fabric in which holes penetrating in the thickness direction are arranged at least over the entire waist circumference region.
Pants-type disposable wearable article according to any one of the first to eighth aspects.

(Action effect)
As described above, holes may be formed in the non-woven fabric layer in the waist circumference region to penetrate in the thickness direction, mainly for improving air permeability. In such a case, it is preferable in terms of manufacturing that the holes are uniformly provided, but in that case, if the number of holes is reduced in order to prevent the decrease in strength due to the holes, the improvement in air permeability is impaired. On the other hand, if reinforcement is performed by extending the display sheet toward the waist opening side as described above, the necessary portion can be selectively reinforced.

<10th aspect>
The waist circumference region of the exterior body has a non-stretchable region provided in the middle in the width direction and a stretchable region provided on both sides of the non-stretchable region in the front-rear direction range having the interior body. And
The stretchable region is a region having the elastic member, and is a region having the elastic member.
The non-stretchable region includes an unnecessary elastic member consisting of a cutting residue continuous from the elastic member of the stretchable region and at least one of both elastic members of the stretchable region and cut pieces of the elastic member not continuous, and cutting of the elastic member. A large number of cutting holes of the non-woven fabric layer formed by the above are formed at intervals.
The cut hole is formed into the separation region.
Pants-type disposable wearable article according to any one of the first to ninth aspects.

(Action effect)
When forming a non-stretchable region by cutting an elastic member in the waist circumference region of the exterior body as in this embodiment, it is desirable to provide a non-woven fabric region in a certain wide range in order to ensure the cutting. In this case, the elastic member It is desirable that the cut holes of the nonwoven fabric layer formed by the cutting of the above are formed not only in the range overlapping with the interior body but also in the separated region. However, in this case, since the nonwoven fabric layer in the separated region is easily torn, it is preferable to reinforce the nonwoven fabric layer in the separated region by extending the display sheet toward the waist opening side as described above.

According to the present invention, there are advantages such as being able to prevent the non-woven fabric layer in the waist circumference region of the exterior body from being torn.

It is a top view which shows the inner surface of the pants type disposable diaper in the unfolded state. It is a top view which shows the outer surface of the pants type disposable diaper in the unfolded state. It is a 2-2 sectional view of FIG. FIG. 3 is a sectional view taken along the line 3-3 of FIG. (A) is a 4-4 cross-sectional view of FIG. 1, and (b) is a 5-5 cross-sectional view of FIG. It is a perspective view (hole omitted) of a pants type disposable diaper. It is a top view which shows the main part of the developed state. It is a top view which shows the outer surface of the pants type disposable diaper in the unfolded state. (A) is a 4-4 cross-sectional view of FIG. 8 and (b) is a 5-5 cross-sectional view of FIG. It is a top view which shows the arrangement example of a hole. It is a top view which shows the main part of the exterior body in an expanded state in an enlarged manner. It is (a) 6-6 cross-sectional view of FIG. 11, (b) 7-7 cross-sectional view of FIG. It is a top view which shows the main part of the exterior body in an expanded state in an enlarged manner. It is (a) 6-6 cross-sectional view of FIG. 13, (b) 7-7 cross-sectional view of FIG. 13, and (c) a sectional view of a contracted state showing a main part. It is (a) orthogonal direction sectional view of the expanded state, (b) expansion and contraction direction sectional view of the expanded state, and (c) widthwise sectional view of the contracted state which show the main part. It is an enlarged sectional view of the perforated nonwoven fabric. (A) is a front view showing the outer surface of a main part of an exterior body in a natural length state, and (b) is a front view showing the outer surface of a main part of an exterior body in a state of being extended to some extent. It is a top view which shows the main part of the back of the pants type disposable diaper in the unfolded state. It is a top view which shows the arrangement example of a cut hole. It is an enlarged view of the main part of a cross section.

Hereinafter, an example of a pants-type disposable diaper will be described in detail with reference to the attached drawings. The dotted pattern portion in the cross-sectional view shows an adhesive as a joining means for joining the constituent members located on the front side and the back side thereof. The hot melt adhesive can be applied by a known method such as slot coating, continuous linear or dotted bead coating, spiral or Z-shaped spray coating, or pattern coating (transfer of hot melt adhesive by letterpress method). Can be applied. Instead of or in conjunction with this, at the fixed portion of the elastic member, a hot melt adhesive can be applied to the outer peripheral surface of the elastic member to fix the elastic member to the adjacent member. Examples of the hot melt adhesive include EVA type, adhesive rubber type (elastomer type), olefin type, polyester / polyamide type and the like, but they can be used without particular limitation. As a joining means for joining each component, a means by welding a material such as a heat seal or an ultrasonic seal can also be used.

The pants-type disposable diapers shown in FIGS. 1 to 6 include a front exterior body 12F constituting the front body F, a rear exterior body 12B constituting the rear body B, and a rear exterior from the front exterior body 12F via the crotch portion. It includes an interior body 200 provided inside the exterior bodies 12F and 12B so as to extend to the body 12B. Both side portions of the front exterior body 12F and both side portions of the rear exterior body 12B are joined to form the side seal portion 12A. As a result, the openings formed by the front and rear ends of the exterior bodies 12F and 12B become waist openings WO through which the wearer's torso passes, and the lower edges of the exterior bodies 12F and 12B and the interior body 200 on both sides in the width direction of the interior body 200. The portions surrounded by the side edges form the leg opening LO through which the legs pass. The interior body 200 is a part that absorbs and holds excrement such as urine, and the exterior bodies 12F and 12B are parts for supporting the interior body 200 with respect to the wearer's body. In the figure, the reference numeral Y indicates the total length of the diaper in the unfolded state (the length in the anteroposterior direction from the edge of the waist opening WO of the front body F to the edge of the waist opening WO of the rear body B), and the reference numeral X indicates the total length in the unfolded state. It shows the full width of the diaper.

Further, the outer bodies 12F and 12B of this pants type disposable diaper have a waist circumference region T defined as a front-back direction range (a front-back direction range from the waist opening WO to the upper end of the leg opening LO) having a side seal portion 12A, and a leg opening. It has an intermediate region L defined as a front-rear direction range of a portion forming LO (between a front-rear direction region having a side seal portion 12A of the front body F and a front-rear direction region having a side seal portion 12A of the back body B). The waist circumference region T can be divided into a "waist portion" W conceptually forming an edge portion of the waist opening and a "waist lower portion" U which is a portion below the waist portion. Normally, when the waist circumference region T has a boundary where the stretching stress in the width direction changes (for example, the thickness and the elongation rate of the elastic member change), the waist opening WO side is the waist rather than the boundary on the waist opening WO side. If there is no such boundary, the waist portion W is located on the waist opening WO side of the absorber 56 or the interior body 200. These lengths in the front-rear direction vary depending on the size of the product and can be appropriately determined. For example, the waist portion W may be 15 to 40 mm and the waist lower portion U may be 65 to 120 mm. On the other hand, both side edges of the intermediate region L are constricted in a U-shape or a curved shape along the circumference of the wearer's leg, and this is a portion for inserting the wearer's leg. As a result, the pants-type disposable diaper in the unfolded state has a substantially hourglass shape as a whole.

(Inner and outer joints)
The fixing of the interior body 200 to the exterior bodies 12F and 12B is not particularly limited, and can be performed by, for example, a hot melt adhesive. In the illustrated example, the back surface of the interior body 200, that is, in this case, the back surface of the liquid impermeable sheet 11 and the inner surface of the exterior bodies 12F and 12B via the hot melt adhesive applied to the root portion 65 of the rising gather 60. Is fixed. The internal / external joints 201 for fixing the interior body 200 and the exterior bodies 12F and 12B can be provided in almost the entire region where the interior bodies 200 overlap, and may be provided, for example, in a portion of the interior body 200 excluding both ends in the width direction. can.

(Interior body)
The interior body 200 can take any shape, but is rectangular in the illustrated form. As shown in FIGS. 3 to 5, the interior body 200 includes a top sheet 30 on the body side, a liquid impermeable sheet 11, and an absorbing element 50 interposed between them. Yes, it is the main body that has an absorption function. Reference numeral 40 indicates an intermediate sheet (second sheet) provided between the top sheet 30 and the absorption element 50 in order to quickly transfer the liquid that has passed through the top sheet 30 to the absorption element 50. Shows rising gathers 60 extending from both sides of the interior body 200 so as to be in contact with the wearer's legs in order to prevent excrement from leaking to both sides of the interior body 200.

(Top sheet)
The top sheet 30 has a property of allowing liquid to permeate, and examples thereof include a perforated or non-perforated non-woven fabric and a porous plastic sheet. Further, among these, the non-woven fabric is not particularly limited as to what the raw material fiber is. For example, olefin-based fibers such as polyethylene and polypropylene, synthetic fibers such as polyester-based and polyamide-based, recycled fibers such as rayon and cupra, natural fibers such as cotton, mixed fibers and composite fibers in which two or more of these are used. Etc. can be exemplified. Further, the nonwoven fabric may be produced by any processing. As the processing method, known methods such as a span lace method, a span bond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, a point bond method and the like can be exemplified. For example, if flexibility and drapeability are required, the spunbond method and spunlace method are preferable, and if bulkiness and softness are required, the air-through method, point bond method, and thermal bond method are preferable processing methods. ..

Further, the top sheet 30 may be one made of one sheet or one made of a laminated sheet obtained by laminating two or more sheets. Similarly, the top sheet 30 may be composed of one sheet or two or more sheets in the plane direction.

Both sides of the top sheet 30 may be folded back on the side edge of the absorbing element 50, or may be projected laterally from the side edge of the absorbing element 50 without being folded.

The top sheet 30 may be fixed to a member adjacent to the back side by a joining means by material welding such as a heat seal or an ultrasonic seal, or by a hot melt adhesive for the purpose of preventing misalignment with respect to the member on the back side. desirable. In the illustrated example, the top sheet 30 is fixed to the surface of the intermediate sheet 40 and the surface of the packaging sheet 58 on the front side of the absorber 56 by a hot melt adhesive applied to the back surface thereof.

(Intermediate sheet)
In order to quickly transfer the liquid that has permeated the top sheet 30 to the absorber, an intermediate sheet (also referred to as a "second sheet") 40 having a faster liquid permeation speed than the top sheet 30 can be provided. The intermediate sheet 40 not only rapidly transfers the liquid to the absorber to improve the absorption performance by the absorber, but also prevents the phenomenon of "return" of the absorbed liquid from the absorber and constantly dries the top sheet 30. It can be in the state of being. The intermediate sheet 40 may be omitted.

Examples of the intermediate sheet 40 include the same materials as the top sheet 30, spunlaced non-woven fabric, spunbonded non-woven fabric, SMS non-woven fabric, pulp non-woven fabric, mixed sheet of pulp and rayon, point-bonded non-woven fabric or crepe paper. In particular, the air-through non-woven fabric is preferable because it is bulky. It is preferable to use a composite fiber having a core-sheath structure for the air-through nonwoven fabric. In this case, the resin used for the core may be polypropylene (PP), but polyester (PET) having high rigidity is preferable. The basis weight is preferably 20 to 80 g / m ² , more preferably 25 to 60 g / m ² . The thickness of the raw material fiber of the non-woven fabric is preferably 2.0 to 10 dtex. In order to make the nonwoven fabric bulky, it is also preferable to use eccentric fibers having no core in the center, hollow fibers, and eccentric and hollow fibers as mixed fibers of all or a part of the raw material fibers.

Although the intermediate sheet 40 of the illustrated form is arranged in the center shorter than the width of the absorber 56, it may be provided over the entire width. The length in the longitudinal direction of the intermediate sheet 40 may be the same as the total length of the diaper, may be the same as the length of the absorbing element 50, or may be within a short length range centered on the region for receiving the liquid.

The intermediate sheet 40 may be fixed to a member adjacent to the back side by a joining means by material welding such as a heat seal or an ultrasonic seal, or by a hot melt adhesive for the purpose of preventing misalignment with respect to the member on the back side. desirable. In the illustrated example, the intermediate sheet 40 is fixed to the surface of the portion of the packaging sheet 58 located on the front side of the absorber 56 by the hot melt adhesive applied to the back surface thereof.

(Liquid impermeable sheet)
The material of the liquid-impermeable sheet 11 is not particularly limited, but is, for example, a plastic film made of an olefin resin such as polyethylene or polypropylene, a laminated nonwoven fabric in which a plastic film is provided on the surface of the nonwoven fabric, or a plastic film. An example is a laminated sheet in which a non-woven fabric or the like is laminated and bonded to the above. For the liquid-impermeable sheet 11, it is preferable to use a liquid-impermeable and moisture-permeable material that is preferably used from the viewpoint of preventing stuffiness. As a moisture-permeable plastic film, a microporous plastic film obtained by kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet and then stretching it in a uniaxial or biaxial direction. Is widely used. In addition to this, non-woven fabrics using microdenyl fibers, leakage-proof enhancement by reducing the voids of the fibers by applying heat or pressure, and coating of highly water-absorbent resin or hydrophobic resin or water-repellent agent. Therefore, a liquid-impermeable sheet without using a plastic film can also be used as the liquid-impermeable sheet 11.

As shown in the figure, the liquid impermeable sheet 11 has a width that fits on the back side of the absorbing element 50, and in order to improve leakage resistance, the liquid impermeable sheet 11 is wrapped around both sides of the absorbing element 50 to form a side surface of the top sheet 30 of the absorbing element 50. It can also be extended to both sides. The width of this extending portion is appropriately about 5 to 20 mm on each of the left and right sides.

(Get up gather)
The rising gather 60 is for preventing lateral leakage, extends along both side portions of the interior body 200 over the entire front-rear direction LD, and stands up from the side portion of the interior body 200 to the front side. In the raised gather 60 of the illustrated example, the base side portion stands up diagonally toward the center side in the width direction, and the tip end side portion stands up diagonally toward the outside in the width direction from the middle portion, but the present invention is limited to this. It is not a thing, and it is possible to make appropriate changes such as a form that stands on the center side in the width direction as a whole.

More specifically, in the raised gather 60 of the illustrated example, the strip-shaped gathered nonwoven fabric 62 having a length equal to the length in the front-rear direction of the interior body 200 is folded back in the width direction WD at the tip portion and folded in two. Along with stacking, a plurality of elongated gather elastic members 63 are fixed in a stretched state along the longitudinal direction between the folded portion and the sheets in the vicinity thereof at intervals in the width direction WD. The base end portion (the end portion opposite to the sheet folded portion in the width direction WD) located on the side opposite to the tip portion of the rising gather 60 is fixed to the side portion on the back side of the liquid permeable sheet 11 in the interior body 200. The root portion 65 is formed, and the portion other than the root portion 65 is the main body portion 66 (the portion on the folded-back portion side) extending from the root portion 65. Further, the main body portion 66 has a root side portion extending toward the center in the width direction and a tip side portion folded back at the tip of the root side portion and extending outward in the width direction. This form is a surface contact type rising gather 60, but a line contact type rising gather 60 that is not folded outward in the width direction can also be adopted. The both ends of the main body portion 66 in the front-rear direction are in an inverted state and are fixed to the side surface of the top sheet 30, while the intermediate portion in the front-rear direction located between them is not fixed. A gather elastic member 63 along the front-rear direction LD is fixed to at least the tip of the free portion 68 in an extended state.

In the rising gather 60 configured as described above, the contraction force of the gather elastic member 63 acts to bring both ends in the front-rear direction closer to each other, but both ends in the front-rear direction of the main body portion 66 are fixed so as not to stand up. On the other hand, since there is a non-fixed free portion 68 between them, only the free portion 68 stands up so as to abut on the body side as shown by an arrow in FIG. In particular, when the root portion 65 is located on the back side of the interior body 200, the free portion 68 stands up so as to open outward in the width direction in the crotch portion and its vicinity, so that the rising gather 60 abuts on the surface around the legs. And the fit will be improved.

(Absorption element)
The absorbing element 50 is not particularly limited, but in this example, it has an absorber 56 and a packaging sheet 58 that encloses the entire absorber 56. The packaging sheet 58 may be omitted.

(Absorber)
The absorber 56 can be formed by an aggregate of fibers. The fiber aggregate is a filament aggregate obtained by stacking short fibers such as cotton-like pulp and synthetic fibers, and opening tow (fiber bundle) of synthetic fibers such as cellulose acetate as needed. Can also be used. It is preferable to disperse and hold the highly absorbent polymer particles in the absorber 56.

The absorber 56 may have a rectangular shape, but as shown in FIG. 7, it has a front end portion, a rear end portion, and a constricted portion 56N located between them and narrower than the front end portion and the rear end portion. The hourglass shape is preferable because the fit of the absorber 56 itself and the rising gather 60 around the legs is improved.

Further, the dimensions of the absorber 56 can be appropriately determined as long as it extends to the front, back, left and right of the urination port position, but it is preferable that the dimensions extend to the peripheral portion of the interior body 200 or its vicinity in the front-back direction LD and the width direction WD. .. Reference numeral 56X indicates the width of the absorber 56.

(Highly absorbent polymer particles)
The absorber 56 may contain high-absorbent polymer particles in part or all of the absorber 56. The highly absorbent polymer particles include "powder" as well as "particles". As the highly absorbent polymer particles 54, those used for this type of disposable diaper can be used as they are.

The material of the highly absorbent polymer particles can be used without particular limitation, but those having a water absorption of 40 g / g or more are preferable. Highly absorbent polymer particles include starch-based, cellulose-based and synthetic polymer-based ones, which are starch-acrylic acid (salt) graft copolymers, starch-acrylonitrile copolymer kendies, and cross-linking of sodium carboxymethyl cellulose. A substance, an acrylic acid (salt) polymer, or the like can be used. As the shape of the highly absorbent polymer particles, the commonly used powder or granular material is preferable, but other shapes can also be used.

As the highly absorbent polymer particles, those having a water absorption rate of 70 seconds or less, particularly 40 seconds or less, are preferably used. If the water absorption rate is too slow, so-called reversion, in which the liquid supplied into the absorber 56 returns to the outside of the absorber 56, is likely to occur.

Further, as the highly absorbent polymer particles, those having a gel strength of 1000 Pa or more are preferably used. As a result, even when the bulky absorber 56 is used, the sticky feeling after liquid absorption can be effectively suppressed.

The basis weight of the highly absorbent polymer particles can be appropriately determined according to the absorption amount required for the use of the absorber 56. Therefore, although it cannot be said unconditionally, it can be set to 50 to 350 g / m ² .

(Packaging sheet)
When the packaging sheet 58 is used, as the material thereof, tissue paper, particularly crepe paper, non-woven fabric, non-woven fabric of polylami, a sheet having small holes, or the like can be used. However, it is desirable that the sheet does not allow the highly absorbent polymer particles to escape. When a non-woven fabric is used instead of the crepe paper, a hydrophilic SMS non-woven fabric (SMS, SMSMS, etc.) is particularly suitable, and the material thereof may be polypropylene, polyethylene / polypropylene composite material, or the like. The basis weight is preferably 5 to 40 g / m ² , especially 10 to 30 g / m ² .

The packaging form of the packaging sheet 58 can be appropriately determined, but from the viewpoint of ease of manufacture and prevention of leakage of highly absorbent polymer particles from the front and rear edge edges, a cylinder is provided so as to surround the front and back surfaces and both side surfaces of the absorber 56. It is preferable that the parts are wound in a shape, the front and rear edges thereof are protruded from the front and back of the absorber 56, and the overlapped portion and the overlapped portion of the front and rear protruding portions are joined by a joining means such as hot melt adhesive or material welding.

(Exterior body)
The exterior bodies 12F and 12B are composed of a front exterior body 12F which is a part constituting the front body F and a rear exterior body 12B which is a part constituting the rear body B, and the front exterior body 12F and the rear exterior body 12B. Is not continuous on the crotch side and is separated in the front-back direction LD (exterior two-piece type). The separation distance 12d can be, for example, about 40 to 60% of the total length Y. Further, as shown in FIGS. 8 and 9, the exterior body 12 can be integrated from the front body F to the rear body B through the crotch and continuously (exterior body integrated type).

In the exterior two-piece type pants-type disposable diaper, the interior body 200 is exposed between the front exterior body 12F and the rear exterior body 12B, so that the liquid-impermeable sheet 11 is not exposed on the back surface of the interior body 200. It is preferable to provide a cover non-woven fabric 20 that covers the back surface of the interior body 200 from between the front exterior body 12F and the interior body 200 to between the rear exterior body 12B and the interior body 200. The material of the cover nonwoven fabric 20 is not particularly limited, and may be, for example, the same material as the outer nonwoven fabric layer 12S or the inner nonwoven fabric layer 12H of the exterior body 12 (either a perforated nonwoven fabric layer or a non-perforated nonwoven fabric layer described later). .. The range in the front-rear direction of the cover non-woven fabric 20 is not particularly limited as long as it has a portion overlapping the front exterior body 12F and the rear exterior body 12B, and extends to the front-rear direction LD over the entire interior body 200 from the front end to the rear end. It may be present, and as shown in FIG. 7, from the front-rear intermediate position of the region where the front exterior body 12F and the interior body 200 overlap, the front-rear intermediate position of the region where the rear exterior body 12B and the interior body 200 overlap. It may extend to the anterior-posterior LD.

The exterior bodies 12F and 12B have a waist circumference region T. Further, in the present embodiment, the front exterior body 12F does not have an intermediate region L, but the rear exterior body 12B has a buttock cover region C extending from the waist circumference region T to the intermediate region L side. Although not shown, the front exterior body 12F may also be provided with an inguinal cover portion extending from the waist circumference region T to the intermediate region L side, or the front exterior body 12F and the front exterior body 12F may be provided with an inguinal cover portion but no buttock cover region. It is not necessary to provide the intermediate region L on both of the rear exterior bodies 12B. Further, in the illustrated example, the lower edge of the buttock cover area C is formed in a straight line along the WD in the width direction like the lower edge of the front exterior body 12F, but is located on the waist opening side toward the outside in the width direction. It can also be a curve that makes it possible.

As shown in FIGS. 3 to 5, the exterior bodies 12F and 12B are formed by laminating the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H. The non-woven fabric forming the outer non-woven fabric layer 12S and the non-woven fabric forming the inner non-woven fabric layer 12H may be individual non-woven fabrics as shown in the illustrated example, or may be a common non-woven fabric. That is, in the latter case, the inner nonwoven fabric layer 12H and the outer nonwoven fabric layer 12S are formed by the inner portion and the outer portion of one piece of nonwoven fabric folded back at the waist opening side edge or the crotch side edge, respectively.

If the edges of the nonwoven fabric forming the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H and the front and rear ends of the interior body 200 are exposed to the waist opening WO, the corners of the nonwoven fabric may hit the skin and the touch may be deteriorated. The elastic stretchable member and the hot melt adhesive for fixing the elastic stretchable member may be exposed. Therefore, as shown in the illustrated example, the nonwoven fabric forming the outer nonwoven fabric layer 12S is folded back most inward at the edge of the waist opening of the nonwoven fabric forming the inner nonwoven fabric layer 12H to form the skin nonwoven fabric layer 12r. It is preferable to extend the layer 12r over the waist side end of the interior body 200. Although not shown, both the nonwoven fabric forming the outer nonwoven fabric layer 12S and the nonwoven fabric forming the inner nonwoven fabric layer 12H are folded inward at the waist side edge, and this folded portion is folded up to the waist side end portion of the interior body 200. It may be postponed.

As the constituent fibers of the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H, for example, olefin-based fibers such as polyethylene or polypropylene, polyester-based synthetic fibers, polyamide-based synthetic fibers (including composite fibers such as core sheaths as well as single component fibers). In addition, recycled fibers such as rayon and cupra, natural fibers such as cotton, and the like can be selected without particular limitation, and these can be mixed and used. In order to increase the flexibility of the non-woven fabric layers 12S and 12H, it is preferable that the constituent fibers are crimped fibers. Further, even if the constituent fibers of the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H are hydrophilic fibers (including those made hydrophilic by a hydrophilic agent), they are hydrophobic fibers or water-repellent fibers (depending on the water-repellent agent). It may be (including water-repellent fibers that have become water-repellent). In addition, the non-woven fabric generally has a short fiber non-woven fabric, a long fiber non-woven fabric, a spunbond non-woven fabric, a melt blown non-woven fabric, a spunlace non-woven fabric, a thermal bond (air-through) non-woven fabric, and a needle punch depending on the fiber length, the sheet forming method, the fiber bonding method, and the laminated structure. It is classified into non-woven fabric, point-bonded non-woven fabric, laminated non-woven fabric (SMS non-woven fabric having a melt blown layer sandwiched between spunbond layers, SMMS non-woven fabric, etc.), and any of these non-woven fabrics should be used as the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H. Can be done.

The fineness and basis weight of the constituent fibers of the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H can be appropriately determined, but usually, they are preferably about 1.8 to 6.0 dtex and about 10 to 30 g / m ² , respectively.

(About perforated non-woven fabric)
As shown in FIGS. 2, 8, 11 and 12, when at least one of the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H is a perforated nonwoven fabric in which holes 14 penetrating in the thickness direction are scattered, the permeability is increased. Although it is preferable because it improves, it is also possible to use a non-woven fabric having no holes formed by drilling. As shown in FIGS. 11 and 12, when the inner nonwoven fabric layer 12H on the skin side of the wearer is a non-woven fabric and the outer nonwoven fabric layer 12S is a perforated nonwoven fabric, the influence on the touch of the pores 14 is eliminated. Can be done. Further, since only one of the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H has a hole 14, the skin is not exposed at the time of wearing, and leakage through the hole 14 can be prevented. Although not shown, the inner nonwoven fabric layer 12H on the skin side of the wearer may be a perforated nonwoven fabric, and the outer nonwoven fabric layer 12S may be a non-woven fabric. As shown in FIGS. 13 and 14, both the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H are perforated nonwoven fabrics, and the holes 14 of one perforated nonwoven fabric and the holes 14 of the other perforated nonwoven fabric do not overlap. It is also preferable to have a structure. In this case, by using both the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H as perforated nonwoven fabrics, higher breathability can be obtained. Further, since the holes 14 of the one-perforated non-woven fabric and the holes 14 of the other perforated non-woven fabric do not overlap with each other, the skin is not exposed at the time of wearing, and leakage through the holes 14 can be prevented. As shown in FIG. 15, both the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H are perforated nonwoven fabrics, and the holes 14 of one perforated nonwoven fabric and the holes 14 of the other perforated nonwoven fabric are completely or partially. It may overlap with. Further, although not shown, when both the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H are porous nonwoven fabrics, in most cases (for example, an area of 50% or more), the pores 14 of one nonwoven fabric and the other are present. Although the holes 14 of the perforated nonwoven fabric do not overlap, in some cases, the holes 14 of one perforated nonwoven fabric and the holes 14 of the other perforated nonwoven fabric may overlap.

The planar shape (opening shape) of each hole 14 can be appropriately determined. The hole 14 has a long hole shape as shown in FIG. 10 (b), a perfect circle as shown in FIG. 10 (e), an ellipse as shown in FIGS. 10 (a) and 10 (d), a triangle, and a rectangle. , A polygon such as a rhombus, a star shape, a cloud shape, or any other shape can be used. As shown in FIG. 10 (c), holes having different shapes may be mixed, but in that case, it is preferable that the dimensions in the expansion / contraction direction are almost the same, and it is more preferable that all the holes have a single shape. preferable. The dimensions of the individual holes 14 are not particularly limited, but the dimensions of the orthogonal direction XD (dimensions of the longest portion) 14L are preferably 0.3 to 3.0 mm, particularly 0.4 to 1.5 mm, and the expansion and contraction direction. The dimension of the ED (dimension of the longest portion) 14W is preferably 0.3 to 5.0 mm, particularly preferably 0.6 to 2.0 mm. When the shape of the hole 14 is long in one direction (the total length in one direction is longer than the total length in the direction orthogonal to it) such as a long hole, an ellipse, a rectangle, a diamond, etc., the dimension in the longitudinal direction. (Dimension of the longest part) is preferably 1.2 to 2.5 times the dimension in the direction orthogonal to this (dimension of the longest part). When the shape of the hole 14 is long in one direction, it is desirable that the longitudinal direction of the hole 14 is the front-rear direction LD, but the width direction WD or the diagonal direction may be used.

The area and area ratio of each hole 14 may be appropriately determined, but the area is preferably about 0.1 to 2.7 mm ² (particularly 0.1 to 1.0 mm ² ), and the area ratio is 1. It is preferably about 0 to 15.0% (particularly 5.0 to 10.0%).

The planar arrangement of the holes 14 can be appropriately determined as long as the rows of the holes 14 arranged at intervals in the direction orthogonal to the expansion / contraction direction ED are arranged at intervals in the expansion / contraction direction ED. For example, as shown in FIGS. 10A, 10C, and 10D, in the arrangement of the holes 14, rows of holes 14 linearly arranged at predetermined intervals in the orthogonal direction XD are spaced apart from each other in the expansion / contraction direction ED. It is preferable that the matrix is repeated. In this case, as shown in FIG. 10A, the arrangement is such that the distance 14x in the expansion / contraction direction ED is shorter than the distance 14y in the orthogonal direction XD, and as shown in FIG. 10C, the distance 14x in the expansion / contraction direction ED is 14x. An arrangement in which the distance 14y between the orthogonal direction XD and the orthogonal direction XD is substantially equal, or, as shown in FIG. 10D, an arrangement in which the distance 14x in the expansion / contraction direction ED is longer than the distance 14y in the orthogonal direction XD can be used. Further, as shown in FIGS. 10 (b) and 10 (e), the rows of holes 14 linearly arranged in the orthogonal direction XD at predetermined intervals are spaced apart in the expansion / contraction direction ED and the positions of the orthogonal directions XD are displaced. It can be arranged in line with. The example shown in FIG. 10B is a so-called staggered (hexagonal grid) arrangement in which the arrangement of the holes 14 is staggered in a row of adjacent holes 14.

The orthogonal spacing 14y and the expansion / contraction spacing 14x of the holes 14 may be constant or variable. The orthogonal direction spacing 14y and the expansion / contraction direction spacing 14x of the holes 14 can be appropriately determined, but in consideration of air permeability, 14y is 2.5 to 10.0 mm, 14x is 1.0 to 5.0 mm, and particularly 14y is. It is desirable that 3.0 to 5.0 mm and 14x are within the range of 1.0 to 2.0 mm.

The cross-sectional shape of the hole 14 is not particularly limited. For example, even if the hole 14 is a punched-type hole whose peripheral edge is formed by a cut end of a fiber as shown in FIG. 16 (d), the hole 14 is a hole as shown in FIGS. 16 (a) to 16 (c). It may be a non-punched type hole 14 (high fiber density at the edge) formed by inserting and expanding a pin between the fibers with almost no cut end of the fiber on the peripheral edge of the 14. As shown in FIG. 16D, the punched-type hole may be one in which the diameter of the hole 14 becomes smaller toward the middle in the thickness direction, or may be smaller toward one side in the thickness direction. .. The diameter of the hole 14 means a dimension that passes through the center of gravity of the hole and is orthogonal to the expansion / contraction direction (hence, in the case of a circle, it is the diameter, and in the case of an ellipse, it is the major axis). Further, when the diameter of the hole 14 decreases in the thickness direction, the diameter of the hole 14 continues to decrease over the entire thickness direction of the nonwoven fabric layer, and the decrease in the diameter of the hole 14 almost disappears in the middle of the thickness direction. Is also included.

In the non-punched type hole 14, the diameter of the hole 14 becomes smaller from the pin insertion side to the opposite side. In such a non-punched type hole, as shown in FIGS. 16A and 16C, fibers are extruded from the edge of the hole 14 on the side opposite to the pin insertion side to the side opposite to the pin insertion side. A portion (burr) 14e is formed and a protruding portion 14e is not formed on the pin insertion side, and as shown in FIG. 16B, a fiber is inserted into the edge of the hole 14 on the side opposite to the pin insertion side. A protrusion 14e formed by extruding the fiber to the side opposite to the side is formed, and a protrusion 14e formed by extruding the fiber to the pin insertion side is formed on the pin insertion side. Further, in the holes 14 of the former type, the protrusions 14e have a substantially uniform protrusion height 14h as shown in FIG. 16A, and the protrusions 14e are provided as shown in FIG. 16C. A facing portion having the highest protruding height 14i and a facing portion facing in a direction orthogonal to the facing portion having the lowest protruding height 14j are included. It is desirable that the protruding portion 14e has a continuous tubular shape in the circumferential direction of the hole, but the protruding portion 14e of a part or all of the holes 14 is formed only in a part of the circumferential direction of the hole 14. May be good. The protrusion heights 14h, 14i, 14j (apparent height measured using an optical microscope without applying pressure) are preferably about 0.2 to 1.2 mm. Further, the highest protrusion height 14i in the protrusion 14e is preferably about 1.1 to 1.4 times the lowest protrusion height 14j. The protrusion height of the protrusion 14e may change in the circumferential direction of the hole 14.

For example, when a hole 14 having a long shape in one direction is formed by inserting a pin as in the example shown in FIGS. 10 (a), (b), and 10 (d), the fibers at the edge of the hole 14 are rejected outward or in the vertical direction. A protruding portion (burr) 14e is formed in which the protruding height 14i of the facing portion in the longitudinal direction of the hole 14 is higher than the protruding height 14j of the facing portion in the direction orthogonal to the longitudinal direction. The protruding portion 14e of the hole 14 may have a lower fiber density than the surrounding portion thereof, but preferably has the same or higher fiber density.

The fineness, basis weight and thickness of the constituent fibers of the perforated non-woven fabric can be appropriately determined, but usually, they are about 1.8 to 6.0 dtex, about 15 to 25 g / m ² , and about 0.1 to 1.3 mm, respectively. Is preferable. The rigidity of the perforated nonwoven fabric in the MD direction (width direction) is preferably 35 to 100 mm, particularly 40 to 70 mm in the non-perforated state before the perforation process, and 10 to 50 mm in the post-perforation process. In particular, it is preferably 15 to 40 mm.

(Expandable area)
The exterior bodies 12F and 12B are provided with an elongated elastic member 19 between the nonwoven fabric layers 12S, 12H and 12r, and an elastic region A2 that elastically expands and contracts in the width direction WD as the elastic member 19 expands and contracts is formed. .. That is, in the expansion / contraction region A2, the width direction WD is the expansion / contraction direction ED, and the front-rear direction is the orthogonal direction orthogonal to the expansion / contraction direction. Further, in the stretchable region A2, in the state of natural length, the nonwoven fabric layers 12S, 12H, 12r shrink with the shrinkage of the elastic member 19, and have a large number of folds 80. Further, when the stretchable region A2 is stretched in the width direction WD, the nonwoven fabric layers 12S, 12H, and 12r are stretched to a predetermined stretch rate that is fully stretched without folds 80. As the elastic member 19, any elongated member can be used regardless of whether it has a thread shape, a string shape, or a band shape. Further, as the elastic member 19, synthetic rubber or natural rubber may be used.

The exterior body 12 having the stretchable region A2 requires joining between the nonwoven fabric layers 12S, 12H and 12r and fixing the elastic member 19 to the nonwoven fabric layers 12S, 12H and 12r, but the structure and the like are particularly limited. Any known structure can be adopted, not one. The illustrated example is an example. That is, in the elastic member 19 sandwiched between the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H in the illustrated example, both ends of the expansion / contraction direction ED in the expansion / contraction region A2 are fixed to the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H. The fixing means of the elastic member 19 is not particularly limited, but it is preferable to use the hot melt adhesive 19H. For example, as shown in FIGS. 11 and 12, after intermittently applying the hot melt adhesive 19H to the outer peripheral surfaces of both ends of the elastic member 19 in the expansion / contraction direction ED by a coating means such as a comb gun or a sure wrap nozzle. The elastic member 19 can be sandwiched between the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H. In this case, the elastic member 19 is fixed to the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H via the hot melt adhesive 19H at both ends of the expansion / contraction direction ED in the expansion / contraction region A2 at the arrangement portion. As shown in FIGS. 13 and 14, after applying the hot melt adhesive 19H to the arrangement positions of both ends of the elastic member 19 in the expansion / contraction direction ED on at least one facing surface of the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H. The elastic member 19 can also be sandwiched between the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H. In this case, the hot melt adhesive 19H may be continuous in the orthogonal direction XD as shown in the illustrated example, or may be intermittently arranged in the orthogonal direction XD. Further, in these cases, the continuous portion of the hot melt adhesive 19H may extend over a plurality of elastic members. Further, as in the elastic member 19 sandwiched between the skin surface nonwoven fabric 12r and the inner nonwoven fabric layer 12H in the example shown in FIG. 5, the skin surface nonwoven fabric 12r and the inner nonwoven fabric 12r and the inner nonwoven fabric are interposed through the hot melt adhesive over the entire width direction WD. It may be fixed to the layer 12H.

In the case of a pants-type disposable diaper as shown in the illustrated example, it is desirable that the elastic member 19, that is, the elastic region A2 is provided in the following portion. That is, a plurality of waist elastic members 17 are attached to the waist portions W of the exterior bodies 12F and 12B at intervals in the front-rear direction so as to be continuous over the entire width direction WD. Further, among the waist elastic members 17, one or a plurality of the elastic members 17 arranged in the region adjacent to the lower waist portion U may overlap with the interior body 200, or may overlap with the interior body 200 in the width direction. Except for the portion, it may be provided on both sides in the width direction. The waist elastic member 17 has a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber, a cross-sectional area of 0.05 to 1.5 mm ² in the case of natural rubber, particularly 0.1 to 1. It is preferable to provide about 3 to 22 thread rubbers (about 0 mm ² ) at intervals of 4 to 12 mm, and the elongation rate of the WD in the width direction of the waist portion W by this is about 150 to 400%, particularly about 220 to 320%. It is preferable to have it. Further, the waist portion W does not need to use the waist portion elastic member 17 having the same thickness for all of the front-rear direction LDs or to have the same elongation rate. The thickness and the elongation rate may be different. The waist elastic member 17 is provided between the skin surface nonwoven fabric 12r and the inner nonwoven fabric layer 12H in the example shown in FIG. 5, but as in the example shown in FIG. 9, the waist elastic member 17 is provided between the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H. It may be provided.

Further, between the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H in the waist lower portion U of the exterior bodies 12F and 12B, a plurality of waist lower elastic members 15 made of elongated elastic members are attached at intervals in the front-rear direction. Has been done.

The elastic member 15 at the lower part of the waist has a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber, a cross-sectional area of 0.05 to 1.5 mm ² in the case of natural rubber, particularly 0.1 to 1. It is preferable to provide about 5 to 30 thread rubbers (about 0 mm ² ) at intervals of 1 to 15 mm, particularly 3 to 8 mm, and the elongation rate of the WD in the width direction of the lower waist portion U by this is 200 to 350%, particularly. It is preferably about 240 to 300%.

Further, a plurality of cover elastic members 16 made of elongated elastic members are attached between the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H in the buttocks cover region C of the rear exterior body 12B at intervals in the front-rear direction. ing.

The cover elastic member 16 has a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , especially 0.1 to 1.0 mm. It is preferable to provide about 2 to 10 rubber threads of about ² ) at intervals of 5 to 40 mm, particularly 5 to 20 mm, and the elongation rate of the WD in the width direction of the cover portion by this is 150 to 300%, particularly 180 to 260. % Is preferable.

When the inguinal cover portion is provided on the front exterior body 12F, the cover portion elastic member can be provided in the same manner.

(Non-stretchable area)
When the elastic members 15 and 16 are provided in the anteroposterior direction range having the absorber 56 as in the lower waist portion U and the buttock cover region C in the illustrated example, the width direction WD of the absorber 56 is partially or wholly provided. In order to prevent shrinkage, the middle width direction (preferably including the entire inner / outer joint portion 201) including a part or all of the portion overlapping the absorber 56 and the width direction WD is defined as the non-stretchable region A1 and the width direction thereof. It is preferable that both sides have elastic regions A2. The waist portion W is preferably the stretchable region A2 over the entire width direction WD, but the non-stretchable region A1 may be provided in the middle in the width direction as in the waist lower portion U.

The stretchable region A2 and the non-stretchable region A1 supply elastic members 15 and 16 between the inner non-stretchable layer 12H and the outer non-stretchable layer 12S, and the elastic members 15 and 16 are provided at least at both ends of the stretchable direction ED in the stretchable region A2. The elastic members 15 and 16 are pressed and pressed at one place in the middle in the width direction in the region that becomes the non-stretchable region A1 and is not fixed in the region that becomes the non-stretchable region A1. It can be constructed by cutting by heating, or by cutting almost the entire elastic members 15 and 16 into small pieces by pressurization and heating, and killing the elasticity in the non-stretchable region A1 while leaving the elasticity in the elastic region A2. .. In the former case, as shown in FIG. 4, the non-stretchable region A1 is a non-woven fabric in a state in which the uncut rest continuous from the elastic members 15 and 16 of the stretchable region A2 is independently shrunk to the natural length as the unnecessary elastic member 18. It will remain between the layer 12S and the inner non-woven fabric layer 12H, and in the latter case, as shown in FIG. 18, the cut residue continuous from the elastic members 15 and 16 of the elastic region A2, and the elastic member 15 of both elastic regions A2, The cut pieces of the elastic member that are not continuous with 16 remain between the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H in a state of being independently shrunk to the natural length as the unnecessary elastic member 18.

As the cutting method of the elastic member 19, any known method can be adopted, such as a method using heating and pressurization, a method using a cutting blade, and the like. In this case, as shown in FIG. 18, the cutting holes 13 may or may not be formed in at least one layer of the nonwoven fabric layers 12S, 12H, 12r at the cutting position. When the cutting hole 13 is formed, as shown in FIG. 18A, even if the cutting hole 13 has almost no gap like a slit, as shown in FIG. 18B, it is punched or melted. It may be a cutting hole 13 having a certain degree of opening, such as that of the above.

When the elastic member 19 is finely cut by pressurization and heating in almost the entire non-stretchable region A1, the arrangement of the positions (that is, the cutting positions) of the cutting holes 13 formed by the elastic member 19 is not particularly limited, and any known arrangement can be used. Can be adopted. For example, an arrangement in which the center points of the cutting holes 13 are in an oblique grid pattern as shown in FIG. 19 (a), or an array in which the center points are in a hexagonal grid pattern as shown in FIG. 19 (b) (these are staggered). Also called), an arrangement in which the center points of the cutting holes 13 are in a square grid pattern as shown in FIG. 19 (c), and an arrangement in which the center points of the cutting holes 13 are in a rectangular grid pattern as shown in FIG. 19 (d). , As shown in FIG. 19 (e), the center point of the cutting hole 13 is in the form of a parallel body grid (as shown in the figure, two groups are provided so that a large number of parallel diagonal rows intersect with each other). , Or sequences that are regularly repeated, such as those tilted at an angle of less than 90 degrees with respect to the anteroposterior direction, are, but are not limited to, one preferred form.

The shape of the cutting hole 13 is not particularly limited, and may be a polygon such as a perfect circle, an ellipse, a triangle, a rectangle, or a diamond, or an arbitrary shape such as a convex lens shape, a concave lens shape, a star shape, or a cloud shape. It is preferably a shape that extends long in one direction, such as a linear shape (slit), a rectangular shape, an elongated hole shape, and an elliptical shape. The orientation of the cutting hole 13 in this case can also be appropriately determined, but in order to ensure the cutting of the elastic member 19, it extends in the front-rear direction as in the example shown in FIGS. 19A, 19B, and 19E. As in the example shown in FIGS. 19 (c) and 19 (d), it is preferable to arrange them so as to extend in a direction inclined at an angle of less than ± 45 degrees with respect to the front-back direction.

The size of each cutting hole 13 is not particularly limited, but the size 13L of the front-rear direction LD is preferably 2 to 7 mm, particularly 2.5 to 3.5 mm, and the size 13W of the width direction WD is 0 mm (in the case of a slit). ) Is preferable. Further, the arrangement of the cutting holes 13 is preferably an arrangement in which rows of holes arranged at intervals in the width direction are repeated in the front-rear direction while being staggered or displaced in the width direction. In this case, it is preferable that the holes in the rows adjacent to each other in the front-rear direction have the same end (see the example of FIG. 19), are close to each other, or overlap each other (see the example of FIG. 18). The distance 13x in the width direction of the cutting holes 13 can be appropriately determined, but is preferably 6 to 15 mm, particularly preferably 8 to 12 mm.

(Joint structure of outer non-woven fabric layer and inner non-woven fabric layer)
As described above, the bonding structure between the nonwoven fabric layers 12S, 12H, and 12r in the stretchable region A2 is not particularly limited, and any known structure can be adopted. For example, in the stretchable region A2 of the example shown in FIGS. 11 and 12, the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H have a sheet bonding portion 70 bonded via a hot melt adhesive 14H, and the hot melt adhesive is formed. The agent 14H is applied in a striped pattern that is spaced in the expansion / contraction direction ED and continuous in the orthogonal direction XD. As described above, when the sheet joints 70 made of the hot melt adhesive 14H are formed at intervals in the expansion / contraction direction ED, breathability and flexibility can be ensured. Further, when the sheet joint portion 70 is formed by applying the hot melt adhesive 14H at intervals in the expansion / contraction direction ED and in a continuous striped pattern in the orthogonal direction XD as described above, the natural length is formed. In the state of contraction to some extent including the state, as shown in FIG. 17, the sheet joint portion 70 becomes a continuous groove in the direction orthogonal to the expansion / contraction direction ED, and the outer non-bonding layer 12S and the inner side in the non-bonded portion between the grooves. The non-woven layer 12H bulges to the same extent in opposite directions (both front and back sides) to form folds 80. In the non-stretchable region A1, the folds 80 are not formed because the contractile force does not act on the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H and the elastic regions A2 on both sides in the width direction pull the fabrics on both sides in the width direction.

The hot melt adhesive 14H may be continuous over the entire orthogonal direction XD of the expansion / contraction region A2, but may be continuous only in a part of the range intersecting the plurality of elastic members 19. The bonding between the skin surface nonwoven fabric layer 12r and the inner nonwoven fabric layer 12H may have the same structure as the bonding between the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H, but may have a different bonding structure. For example, as in the example shown in FIG. 5, the skin surface nonwoven fabric layer 12r and the inner nonwoven fabric layer 12H are a hot melt adhesive applied over the entire width direction at the arrangement position of the waist elastic member 17 and a wide range of facing surfaces. Even if it is bonded via a hot melt adhesive 14H (see FIG. 5) applied in a spiral shape over (for example, up to a range overlapping the crotch side part of the waist elastic member as shown in the illustrated example). good.

On the other hand, when this stretchable structure is manufactured using a ready-made perforated non-woven fabric, the coating line of a part of the hot melt adhesive 14H and the row of the holes 14 overlap each other, so that the outer non-woven fabric is located at the portion to be the sheet joint. There is a possibility that a missing portion is formed in which the layer 12S and the inner non-woven fabric layer 12H are not bonded. Here, if the distance 14y of the orthogonal direction XD of the holes 14 in the row of the holes 14 is narrower than the dimension 14L of the orthogonal direction XD of the holes 14, the sheet joint 70 may have a dotted line shape intermittently through a long missing portion. A large number of long concave missing portions may be formed on the edge of the sheet joint portion 70. When the loss of the sheet joint 70 becomes large in this way, in the stretchable region A2, large irregularities are formed on the side edges of the folds 80, and it becomes easy to partially combine with the adjacent folds 80. It is difficult to get a neat appearance.

On the other hand, as shown in the illustrated example, when the distance 14y of the orthogonal direction XD of the holes 14 in the row of the holes 14 is wider than the dimension 14L of the orthogonal direction XD of the holes 14, some sheet joints 70 have a missing portion. Even if it is formed, the ratio of the missing portion to the orthogonal direction XD of the sheet joint portion 70 is less than half, so that the influence of the missing portion on the shape of the fold 80 can be smaller. Therefore, as shown in FIG. 17, even if unevenness is formed on the side edge of the fold 80 or is partially combined with the adjacent fold 80, the degree can be suppressed.

The distance 14y of the orthogonal direction XD of the holes 14 in the row of the holes 14 can be appropriately determined as long as it is wider than the dimension 14L of the orthogonal direction XD of the holes 14, but it is three times or more the dimension 14L of the orthogonal direction XD of the holes 14. And, even if unevenness is formed on the side edge of the fold 80 in the expansion / contraction region A2 due to the missing portion (the portion overlapping the hole 14) of the sheet joint 70, or even if it is partially combined with the adjacent fold 80. It will be almost inconspicuous. Further, when the distance 14y of the orthogonal direction XD of the holes 14 in the row of the holes 14 exceeds 20 times the dimension 14L of the orthogonal direction XD of the holes 14, the number of the holes 14 per unit area is reduced, and the perforated nonwoven fabric is adopted. It will be poor in profit. A more preferable range is 3 to 10 times.

It is also preferable that the interval 14y of the orthogonal direction XD of the holes 14 in the row of the holes 14 is equal to or larger than the interval 19y of the orthogonal direction XD of the elastic member 19. As a result, in the expansion / contraction region A2, since there is only one or less holes 14 in each row in all the regions between the adjacent elastic members 19, the change in bendability due to the presence or absence of the holes 14 is small. The more organized folds 80 are more likely to be formed.

Further, in the illustrated example, all of the expansion / contraction regions A2 satisfy the magnitude relationship of the interval 14y and the dimension 14L, but all of the expansion / contraction regions A2 do not have to satisfy the magnitude relationship of the interval 14y and the dimension 14L. For example, although not shown, the waist portion W does not satisfy the magnitude relationship of the interval 14y and the dimension 14L, but the waist portion W may satisfy the magnitude relationship of the interval 14y and the dimension 14L other than the waist portion W. The same applies to the relationship between the intervals 14y and 19y, and the stretchable region A2 may or may not be filled with all of the stretchable region A2.

The distance 14x between the expansion and contraction direction EDs of the rows of the holes 14 can be appropriately determined, but if the distance between the expansion and contraction direction EDs of the sheet joint 70 is smaller than 70y, one or more holes in each fold 80 as shown in the illustrated example. 14 is present, which is preferable because the space between the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H in each fold 80 and the air permeability between the outside and the outside are improved. If the distance between the expansion and contraction direction EDs of the rows of the holes 14 is narrowed in this way, the probability that the application line of the hot melt adhesive 14H overlaps with the rows of the holes 14 increases, but even in that case, as described above. Since the distance 14y of the orthogonal direction XD of the holes 14 in the row of the holes 14 is wider than the dimension 14L of the orthogonal direction XD of the holes 14, the collapse of the shape of the folds 80 can be suppressed.

As described above, the cross-sectional structure of the hole 14 is not particularly limited, but if the protruding portion 14e is formed at the edge of the hole 14 on the opposite non-woven layer side, the hot melt adhesive 14H is applied. When the wire and the hole 14 overlap, the portion including the protruding portion 14e at the edge of the hole 14 is adhered by the hot melt adhesive 14H, so that the hot melt adhesive 14H bites well and the protruding portion 14e The adhesive strength is higher than that in the case of not having. Further, since the perforated non-woven fabric is separated from the facing non-woven fabric by the amount of the protruding portion 14e, the hot melt adhesive 14H exposed from the holes 14 when the surface opposite to the facing non-woven fabric side is touched by hand is obtained. It also has the advantage of being difficult to touch.

In particular, when both the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H are perforated nonwoven fabrics and there is a possibility that the holes 14 and the holes 14 overlap, the hot melt adhesive 14H is applied to the portion where the holes 14 and the holes 14 overlap. When the coating lines overlap, the hot melt adhesive 14H may squeeze out into the holes 14 and cause problems such as a feeling of wearing. Therefore, as shown in FIGS. 11 and 12, the structure in which the inner nonwoven fabric layer 12H on the skin side of the wearer is a non-woven fabric and the outer nonwoven fabric layer 12S is a perforated nonwoven fabric, and FIGS. 13 and 14 show. As described above, it is desirable that both the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H are perforated nonwoven fabrics, and the pores 14 of one perforated nonwoven fabric and the holes 14 of the other perforated nonwoven fabric do not overlap.

As described above, the arrangement of the holes 14 is not limited, but the perforated nonwoven fabric is easily bent at the portion having the holes 14, and thus affects the shape of the folds 80. Therefore, when the arrangement of the holes 14 is a matrix in which rows of holes 14 linearly arranged in the orthogonal direction XD at predetermined intervals are repeated at predetermined intervals in the expansion / contraction direction ED, the folds 80 are particularly arranged in the orthogonal direction XD. It is preferable because it extends linearly along the line and tends to be neatly arranged.

Further, the specific dimensions and arrangement of the holes 14 and the sheet joint 70 can be appropriately determined, but it is particularly preferable that the dimensions and arrangement are within the following ranges. That is, when the sheet joint 70 has a missing portion, the bonded portion is more likely to be peeled off than the area of the sheet joint 70 is simply reduced because stress is likely to be concentrated. When such peeling of the adhesive portion occurs, the appearance of the folds 80 may be further deteriorated due to the collapse of a part or the whole of the folds 80. On the other hand, if the arrangement of the holes 14 and the sheet joint 70 is within this range, even if the sheet joint 70 has a missing portion, it is difficult to peel off.
Dimensions of ED in the expansion / contraction direction of the hole 14 14W: 0.3 to 5.0 mm (especially 1.0 to 2.0 mm)
Dimension 14L of the hole 14 in the orthogonal direction XD: 0.3 to 3.0 mm (particularly 1.0 to 1.5 mm)
Orthogonal XD spacing of holes 14 in rows 14y: 2.5 to 10.0 mm (particularly 3.0 to 5.0 mm)
Row expansion / contraction direction ED spacing 14x: 1.0 to 5.0 mm (especially 1.0 to 2.0 mm)
Dimensions of sheet joint in expansion and contraction direction: 0.5 to 4 mm (especially 1.0 to 2.0 mm)
Spacing between sheet joints in the expansion and contraction direction: 4 to 8 mm (especially 6 to 8 mm)

The holes 14 and the sheet joint 70 can be provided only in the stretchable region A2, but can be provided over a wider area including the non-stretchable region A1 as in the examples shown in FIGS. 8 and 9.

The sheet bonding portion 70 of the above example is a portion where the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H are bonded via a hot melt adhesive 14H, but is a portion where the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H are welded. There may be. That is, when forming the sheet joint 70, the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H may be welded in a striped pattern that is spaced in the expansion / contraction direction ED and continuous in the orthogonal direction XD. In this case, the elastic member 19, the outer nonwoven fabric layer 12S, and the inner nonwoven fabric layer 12H may or may not be welded at the passing position of the elastic member 19. In any case, in order to weld the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H with the elastic member 19 interposed therebetween, the melted portions of the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H are the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer. At least one of 12H will be continuous in the orthogonal direction XD.

(Separation area)
As shown in FIGS. 1, 2, 5, 7, 9, 18, and 20, the waist circumference region T of the exterior body 12 is the edge between the waist portion W and the waist opening WO side of the interior body 200. It has a separation region E formed between and. This separation region E is a portion that is particularly easily hit by a fingertip among the portions that are grasped by hand when wearing a pants-type disposable wear item. The size of the front-rear direction LD of the separation region E can be appropriately determined, but as shown in FIG. 7, the distance 12E of the front-rear direction LD between the edge of the waist opening WO and the edge of the interior body 200 on the waist opening WO side is 100. When it is%, it can be about 0 to 30%. The specific dimension of the LD in the front-rear direction of the separation region E can be, for example, about 0 to 13 mm.

As shown in FIG. 7, holes H penetrating in the thickness direction are provided at least one layer of the nonwoven fabric layers 12S, 12H, 12r in the separation region E at intervals in the width direction WD. For example, in the case of the illustrated example, the outer nonwoven fabric layer 12S is formed by the perforated nonwoven fabric in which the holes 14 are preceded almost entirely, and the perforated nonwoven fabric is placed on the skin side of the inner nonwoven fabric layer 12H at the edge of the waist opening WO. It is folded back to form a non-woven fabric layer 12r on the skin that extends to the end of the interior body 200 on the WO side of the waist opening. That is, in this case, the nonwoven fabric layer in the separated region E has a three-layer structure, and the holes 14 are formed in the two layers of the outermost surface and the innermost surface. Of course, the nonwoven fabric layer having holes H is not limited to this as long as it is a nonwoven fabric layer forming the separation region E, and even if the pores H are formed only in one layer such as the outer nonwoven fabric layer 12S or the inner nonwoven fabric layer 12H only. Alternatively, the pores H may be formed only in the two layers of the inner nonwoven fabric layer 12H and the outer nonwoven fabric layer 12S, or only in the two layers of the inner nonwoven fabric layer 12H and the skin surface nonwoven fabric layer. Further, in the exterior body 12 of the illustrated example, the nonwoven fabric layer in the separated region E has a three-layer structure, but it may have a two-layer structure or a single-layer structure.

The hole H in the separation region E is not limited by the purpose or the forming method. Therefore, the hole H may be provided only in the separation region E, or the hole H may be provided over the separation region E and its periphery (for example, at least over the entire waist circumference region T). As an example, as shown in the illustrated example, as a result of using an effective nonwoven fabric having holes 14 formed by perforation as a constituent material in order to improve the air permeability of the exterior body 12, the nonwoven fabric layer in the separation region E is used. It is conceivable to have a hole 14 in the. As another example, it is conceivable that as a result of the range for cutting the elastic member 19 for forming the above-mentioned non-stretchable region A1 reaches within the separation region E, the cutting hole 13 is formed in the nonwoven fabric layer of the separation region E. Be done.

The size and arrangement of the holes H in the separation region E are not particularly limited as long as they are provided at intervals in the width direction WD, but are 3 to 10 times the size of the width direction WD of the holes H. It is preferable that the interior body 200 is provided at least over the entire range of the widthwise WD at intervals of a certain degree. Further, in the separation region E, a plurality of rows of holes H arranged in the width direction WD may be provided at intervals in the front-rear direction LD, or only one row may be provided. When the hole H in the separation region E is the hole 14 of the above-mentioned perforated non-woven fabric, the dimensions and arrangement of the hole 14 are the same, and when it is the cut hole 13 of the above-mentioned non-stretchable region A1, the hole H is the same. Needless to say, the dimensions and arrangement of the cutting holes 13 are the same. However, even in other cases, the dimensions and arrangement of the holes 14 of the perforated nonwoven fabric described above and the dimensions and arrangement of the cut holes 13 of the non-stretchable region A1 described above can be determined in the same manner.

(Display sheet)
As shown in FIGS. 2, 4, 5 to 9, 18 and 20, a display sheet 25 having a display 27 such as a character is interposed in an area of the exterior bodies 12F and 12B that overlaps with the interior body 200. The display of the display sheet 25 can be seen through the one-layer or a plurality of layers of the non-woven fabric layers 12S and 12H located on the outside.

Characteristically, the display sheet 25 extends from the region overlapping the interior body 200 to the waist opening WO side from the center of the front-rear direction LD of the separation region E. When a large number of holes H (see FIG. 7) are formed in at least one layer of the nonwoven fabric layers 12S, 12H, and 12r in the separated region E, as shown in FIG. 18, the portion including the waist portion W is grasped by hand. If the leg is passed through the leg opening LO and then pulled up to the waist, the non-woven fabric layers 12S, 12H, 12r in the separation region E may be torn because the fingertips easily hit the separation region E. This is because the presence of the holes H reduces the strength of the nonwoven fabric layer having the holes H, and thus the strength of the separated region E. On the other hand, as shown in the figure, if the display sheet 25 extends from the region overlapping with the interior body 200 to the waist opening WO side from the center of the front-rear direction LD of the separation region E, when the display sheet 25 is attached, etc. The portion where the fingertip touches is reinforced by the display sheet 25, and the separation region E is less likely to be torn.

The display sheet 25 may extend to the vicinity of the boundary with the waist portion W or may extend into the waist portion W as long as it extends from the center of the front-rear direction LD of the separation region E to the waist opening WO side. However, if the display sheet 25 extends to the waist portion W, the rigidity of the waist portion W becomes high, and the elasticity may be hindered. Therefore, it is preferable that the display sheet 25 is separated from the waist elastic member 17 located on the crotch side by 3 mm or more on the crotch side. On the other hand, the dimension of the front-rear direction LD of the region overlapping the interior body 200 of the display sheet 25 may be appropriately determined, but usually, the dimension of the front-rear direction LD of the portion located in the separation region E of the display sheet 25 is larger than the dimension of the front-rear direction LD. It is preferable to have. Further, since the appearance is different between the portion located in the separation region E of the display sheet 25 and the portion of the display sheet 25 that overlaps with the interior body 200, the display 27 of the display sheet 25 is not provided in the separation region, and the interior body 200 is not provided. It is desirable to provide it only in the part that overlaps with.

The display sheet 25 of the illustrated example extends from the center of the LD in the front-rear direction of the separation region E to the waist opening WO side in both the front body F and the back body B, but only one of them may be used.

Although the display sheet 25 is provided between the inner nonwoven fabric layer 12H and the interior body 200 in the illustrated example, it may be provided between the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H. In the latter case, it may be provided between the outer nonwoven fabric layer 12S and the unnecessary elastic member 18, or may be provided between the inner nonwoven fabric layer 12H and the unnecessary elastic member 18. From the viewpoint of reinforcement, it is desirable that it is adhered to the non-woven fabric layers 12S and 12r having holes, but from the viewpoint of improving visibility from the outer surface of the product, it is provided adjacent to the inner surface of the outermost non-woven fabric layer. It is desirable to be there.

The display sheet 25 is adhered to at least one layer of the nonwoven fabric layers 12S, 12H, 12r of the exterior body 12 via the hot melt adhesive 25H. Even if the display sheet 25 is provided, the strength can be improved by increasing the number of laminated fabrics, so that it is basically difficult to tear. However, in order to further improve the strength, the display has a sufficiently large adhesive area. It is preferable to bond the sheet 25 to at least one layer of the non-woven fabric layer. Therefore, the application pattern of the hot melt adhesive 25H is not particularly limited, but a dense pattern is preferable. As such a dense coating pattern, in addition to a pattern that is continuous without gaps (spray coat, curtain coat, slot coat as the coating method), a spiral pattern with narrow gaps, a Z-shaped pattern, or the like can be adopted. .. Specifically, it is preferable that an area of 80% or more of the display sheet 25 is adhered to at least one layer of the nonwoven fabric layers 12S, 12H, 12r via the hot melt adhesive 25H.

The material of the display sheet 25 is not particularly limited as long as it is suitable for printing, and for example, paper such as crepe paper, resin film, or the like can be used. When crepe paper is used, its thickness is preferably 100 to 150 μm, and its density is preferably 100 to 200 kg / m ³ . A crepe paper having such a thickness and density can be produced by setting a basis weight of 10 g / m ² or more and a crepe ratio of about 10%. The density can be calculated from the basis weight and the thickness. The crepe ratio is a value calculated by ((peripheral speed of Yankee dryer)-(peripheral speed of take-up reel)) / (peripheral speed of Yankee dryer) × 100 (%).

The strength of the display sheet 25 is not particularly limited, but the tensile strength specified in JIS-P-8113 is preferably 19 to 30 N / 25 mm in the width direction, particularly preferably 21 to 25 N / 25 mm, and is preferably 21 to 25 N / 25 mm in the front-rear direction. It is preferably 4 to 10 N / 25 mm, particularly preferably 5 to 8 N / 25 mm.

The display 27 added to the display sheet 25 is not particularly limited, and is a pattern for decoration (including a picture or a one-point character), a function display such as usage method, usage assistance, size, etc., or a manufacturer, product name, or feature. It is possible to add a display such as a mark display such as a target function by printing or the like.

The dimensions of the display sheet 25 may be appropriately determined, but in normal cases, the display sheet 25 is preferably provided within the width direction range overlapping the interior body 200, and is preferably provided within the width of the interior body 200. Is preferably 50 to 100% of the width of the interior body 200 in order to suppress tearing of the nonwoven fabric layer.

Most of the tears of the nonwoven fabric layers 12S, 12H, 12r in the separated region E of the waist circumference region T by grasping the exterior body 12 are lateral tears (tears along the width direction WD). Therefore, by shortening the dimension of the WD in the width direction of the hole H, it is possible to prevent such lateral tearing from occurring. On the other hand, by making the dimension of the LD in the anteroposterior direction of the hole H sufficiently longer than the dimension of the WD in the width direction of the hole (that is, making it vertically long), the significance of forming the hole H can be made sufficient. Specifically, it is preferable that the hole H has a dimension of WD in the width direction of 1.2 mm or less, and the dimension of LD in the front-rear direction is 1 to 2 times the dimension of WD in the width direction.

Further, the shape of the hole H is a horizontally long shape in which the dimension of the WD in the width direction is 0.3 to 5.0 mm and the dimension of the WD in the width direction is about 1.2 to 2.5 times the dimension of the LD in the front-rear direction. If there is, lateral tearing is especially likely to occur. Therefore, the extension of the display sheet 25 to the waist opening WO side is particularly significant when such a horizontally long hole is provided in the separation region E.

Further, the arrangement of the holes H is a matrix arrangement in which the rows of holes H linearly arranged at intervals in the anteroposterior direction LD are repeated at intervals in the width direction WD, and the rows of holes H are arranged in the width direction WD. When the distance between the holes H is narrower than the distance between the LDs in the anteroposterior direction of the hole H, lateral tearing is particularly likely to occur. Therefore, the extension of the display sheet 25 to the waist opening WO side is particularly significant when such an arrangement of holes H is adopted.

Further, in particular, the nonwoven fabric layers 12S, 12H, 12r of the separated region E of the exterior body 12 are effective nonwoven fabrics having holes 14 formed by perforation processing, and are cut holes by forming the above-mentioned non-stretchable region A1. When 13 is provided in the separation region E, the nonwoven fabric layers 12S, 12H, 12r in the separation region E are easily torn. Therefore, the extension of the display sheet 25 to the waist opening WO side is particularly significant in such a case.

On the other hand, when the exterior body 12 is grasped by hand, as shown in FIG. 18, the thumb often contacts the outer surface of the waist circumference region T, and the other fingers often contact the skin-side surface of the waist circumference region T, so that they are worn disposable. When pulling up an article, a stronger force is often applied over a wider area to the surface on the skin side. Therefore, when the skin surface nonwoven fabric layer 12r constituting the surface on the skin side in the separated region E has holes H, the nonwoven fabric layer in the waist circumference region T is likely to be torn. Therefore, the extension of the display sheet 25 to the waist opening WO side is particularly significant in such a case.

<Explanation of terms in the specification>
The following terms in the specification have the following meanings unless otherwise specified in the specification.

-The "front-back direction" means the direction (vertical direction) indicated by the symbol LD in the figure, and the "width direction" means the direction (horizontal direction) indicated by WD in the figure, and the front-back direction and the width direction. Are orthogonal.

-The "MD direction" and "CD direction" mean the flow direction (MD direction) in the manufacturing equipment and the lateral direction (CD direction) orthogonal to the flow direction, one of which is the front-rear direction and the other. Is in the width direction. The MD direction of the nonwoven fabric is the direction of the fiber orientation of the nonwoven fabric. The fiber orientation is the direction along which the fibers of the non-woven fabric are aligned. It can be discriminated by a simple measurement method for determining the orientation direction.

・ "Front side" means the person closer to the wearer's skin when wearing a pants-type disposable diaper, and "back side" means the person farther from the wearer's skin when wearing a pants-type disposable diaper. ..

・ "Front side" means the side of the member that is closer to the wearer's skin when wearing a pants-type disposable diaper, and "back side" means the side of the member that is closer to the wearer's skin when wearing a pants-type disposable diaper. It means the far side.

-Regarding the closed plane shape, "center" means the center of gravity in the case of a figure that does not have a center.

-"Area ratio" means the ratio of the target part to the unit area, and is expressed as a percentage by dividing the total area of the target part (for example, holes) in the target area (for example, non-woven fabric) by the area of the target area. be. In a form in which a large number of target portions are provided at intervals, it is desirable to set the target area to a size that includes 10 or more target portions and obtain the area ratio. For example, the area ratio of the holes can be measured by the following procedure using, for example, VHX-1000, which is a trade name of KEYENCE, and the measurement conditions are set to 20 times.
(1) Set it on a 20x lens and adjust the focus. Adjust the position of the non-woven fabric so that the holes are 4x6.
(2) Specify the brightness of the hole area and measure the hole area.
(3) Click the color extraction of "Area measurement" in "Measurement / Comment". Click on the hole.
(4) Click "Batch measurement", check "Display measurement result window", and save as CSV data.

-"Elongation rate" means a value when the natural length is 100%. For example, an elongation rate of 200% is synonymous with an elongation ratio of 2 times.

-"Gel strength" is measured as follows. Artificial urine (urea: 2 wt%, sodium chloride: 0.8 wt%, calcium chloride dihydrate: 0.03 wt%, magnesium sulfate heptahydrate: 0.08 wt%, and ion-exchanged water: 97.09 wt% Add 1.0 g of highly absorbent polymer to 49.0 g of the mixture and stir with a stirrer. The produced gel is left in a constant temperature and humidity chamber at 40 ° C. × 60% RH for 3 hours, then returned to room temperature, and the gel strength is measured with a card meter (Curdmeter-MAX ME-500 manufactured by I.techno Engineering).

・ "Metsuke" is measured as follows. After the sample or test piece is pre-dried, it is left in a test room or device in a standard state (the test place is a temperature of 23 ± 1 ° C. and a relative humidity of 50 ± 2%) to bring it into a constant weight state. Pre-drying refers to constant weight of a sample or test piece in an environment with a temperature of 100 ° C. For fibers with an official moisture content of 0.0%, pre-drying does not have to be performed. From the test piece in a constant weight state, a sample having a size of 100 mm × 100 mm is cut out using a sample collecting template (100 mm × 100 mm). The weight of the sample is measured and multiplied by 100 to calculate the weight per square meter, which is used as a basis weight.

-The "thickness" is automatically measured using an automatic thickness measuring device (KES-G5 handy compression measuring program) under the conditions of a load of 0.098 N / cm ² and a pressurized area of 2 cm ² .

-"Rigidity and softness" means "8.21.1 A method (45 ° cantilever method)" of JIS L 1096: 2010 "Fabric test method for woven fabrics and knitted fabrics". If the non-woven fabric before perforation is not available, the value of the perforated non-woven fabric before perforation is the same except for the presence or absence of holes (fiber composition, fineness, basis weight, thickness, etc.). It shall be prepared and measured.

-The water absorption amount is measured by JIS K7223-1996 "Water absorption amount test method for highly water-absorbent resin".

-The water absorption rate shall be the "time to the end point" when JIS K7224-1996 "Water absorption rate test method for highly water-absorbent resin" was performed using 2 g of highly absorbent polymer and 50 g of physiological saline. ..

-"Unfolded state" means a state in which the unfolded state is flat without shrinkage or slack.

-Unless otherwise specified, the dimensions of each part mean the dimensions in the unfolded state, not in the natural length state.

-If there is no description of the environmental conditions in the test or measurement, the test or measurement shall be performed in a test room or device under standard conditions (test location: temperature 23 ± 1 ° C, relative humidity 50 ± 2%). do.

INDUSTRIAL APPLICABILITY The present invention can be used without particular limitation as long as it is a pants-type disposable wearing article, such as a pants-type disposable diaper or a diaper cover as in the above example.

A1 ... non-stretchable area, A2 ... stretchable area, B ... back body, C ... buttock cover area, E ... separation area, ED ... stretch direction, F ... front body, H ... hole, L ... intermediate area, LD ... front-back direction , LO ... Leg opening, T ... Waist circumference area, U ... Waist lower part, W ... Waist part, WD ... Width direction, WO ... Waist opening, XD ... Orthogonal direction, 11 ... Liquid permeable sheet, 12 ... Exterior body , 12A ... Side seal part, 12B ... Rear exterior body, 12F ... Front exterior body, 12H ... Inner non-woven fabric layer, 12S ... Outer non-woven fabric layer, 12r ... Skin surface non-woven fabric layer, 13 ... Cutting holes, 14 ... Holes, 14e ... Protruding part, 14H ... Hot melt adhesive, 18 ... Unnecessary elastic member, 19 ... Elastic member, 20 ... Cover non-woven fabric, 25 ... Display sheet, 30 ... Top sheet, 40 ... Intermediate sheet, 50 ... Absorbent element, 56 ... Absorber , 58 ... packaging sheet, 60 ... rising gather, 62 ... gathered non-woven fabric, 70 ... sheet joint, 80 ... folds, 200 ... interior body, 201 ... inside / outside joint.

Claims (9)

An integrated exterior body from the front body to the back body, or an exterior body separately provided on the front body and the back body,
The interior body that extends to both the front and back of the crotch part attached to the middle part in the width direction of this exterior body,
Side seals where both sides of the exterior body on the front body and both sides of the exterior body on the back body are joined, respectively.
With a waist opening and a pair of left and right leg openings,
The interior body has a top sheet having a property of permeating liquid, a liquid impermeable sheet, and an absorbing element interposed between them.
The exterior body has a waist circumference region that is a range in the front-rear direction corresponding to the side seal portion.
The waist circumference region has a plurality of laminated nonwoven fabric layers and an elongated elastic member provided between the nonwoven fabric layers.
The waist circumference region is located at the edge of the waist opening, has the waist portion having the elastic member, is located on the crotch side of the waist portion, has the lower waist portion having the elastic member, and has the waist portion and the interior. It has a separation region formed between the waist opening side edge of the body, and a non-stretchable region provided in the middle in the width direction in the anteroposterior direction range having the interior body, and this non-stretchable region . It has an elastic region provided on both sides in the width direction of the region, and has an elastic region.
The stretchable region is a region having the elastic member, and is a region having the elastic member.
The non-stretchable region includes an unnecessary elastic member consisting of a cutting residue continuous from the elastic member of the stretchable region and at least one of both elastic members of the stretchable region and cut pieces of the elastic member not continuous, and cutting of the elastic member. It has a cut hole that penetrates the non-woven fabric layer formed by the above in the thickness direction.
In pants-type disposable wear items
In at least one layer of the nonwoven fabric layer in the separation region, the cutting holes are arranged at intervals of 6 to 15 mm in the width direction.
The exterior body in the region where the exterior body and the interior body overlap at least one of the front body and the back body is provided with a display sheet having a display visible from the outer surface.
The display sheet at least one of the front body and the back body extends from the region overlapping with the interior body to the waist opening side from the cutting hole in the separation region .
The width of the display sheet is 50 to 100% of the width of the interior body.
An area of 80% or more of the display sheet is adhered to the nonwoven fabric layer having the cutting holes via a hot melt adhesive .
Pants-type disposable wear items that are characterized by that. The non-woven fabric layer having the cut holes is a perforated non-woven fabric in which non-punched type holes formed so as to penetrate in the thickness direction by inserting a pin between fibers are arranged at least over the entire waist circumference region. can be,
In the perforated nonwoven fabric in the separation region, the non-punched type holes are arranged at intervals of 1.0 to 5.0 mm in the width direction.
The pants-type disposable wear item according to claim 1. The non-punched type hole has a width direction dimension of 0.3 to 5.0 mm, and a width direction dimension of 1.2 to 2.5 times the front-rear direction dimension.
The pants-type disposable wear item according to claim 2 . In the non -punched type holes, rows of the non-punched type holes that are linearly arranged at intervals in the front-rear direction are arranged in a matrix that repeats at intervals in the width direction.
The widthwise spacing of the rows of non -punched holes is narrower than the anteroposterior spacing of the non-punched holes.
The pants-type disposable wear article according to claim 2 or 3 . The nonwoven fabric layer includes an outer nonwoven fabric layer made of the perforated nonwoven fabric, an inner nonwoven fabric layer, and the outer nonwoven fabric layer folded back toward the skin side of the inner nonwoven fabric layer at the edge of the waist opening, and the waist opening of the interior body. Including a non-woven fabric layer on the skin formed extending to the side edge,
The separated region has only the outer nonwoven fabric layer, the inner nonwoven fabric layer, and the skin surface nonwoven fabric layer as the nonwoven fabric layer.
Each of the outer nonwoven fabric layer and the skin surface nonwoven fabric layer has the non-punched type hole in the separated region.
The outer non-woven fabric layer has the cut hole in the separated region and has the cut hole.
The display sheet is sandwiched between the inner nonwoven fabric layer and the skin surface nonwoven fabric layer in the separated region.
The pants-type disposable wear item according to any one of claims 2 to 4. The nonwoven fabric layer has a fineness of 1.8 to 6.0 dtex and a basis weight of 10 to 30 g / m ² .
The pants-type disposable wear item according to any one of claims 1 to 5. The display sheet is a crepe paper having a tensile strength of 19 to 30 N / 25 mm in the width direction and a tensile strength of 4 to 10 N / 25 mm in the front-rear direction.
The pants-type disposable wear item according to any one of claims 1 to 6. The display sheet does not have the display in the separation region, and has the display only in the portion overlapping the interior body.
The pants-type disposable wear item according to any one of claims 1 to 7. The display sheet is separated from the elastic member located most on the crotch side in the waist portion by 3 mm or more on the crotch side.
The pants-type disposable wearable article according to any one of claims 1 to 8.

Images