JP6917240B2 - Absorbent article - Google Patents

Description

The present invention relates to an absorbent article comprising a surface sheet on which a skin care agent is arranged and leak-proof cuffs arranged on both sides of the surface sheet.

For absorbent articles such as disposable diapers, those equipped with a leak-proof cuff that stands up toward the wearer's skin at the inseam when worn as a leak-proof wall to prevent lateral leakage of excrement such as urine from the inseam. It is known (for example, Patent Documents 1 and 2). In a typical leak-proof cuff, one end side of the hydrophobic leak-proof cuff forming sheet in the lateral direction is joined to another member such as a back surface sheet to form a fixing portion, and the other end side is folded back inside the folded portion. The elastic member has a structure in which it is fixed in an extended state. In the leak-proof cuff having such a configuration, the folded portion of the leak-proof cuff forming sheet is joined to other members such as a surface sheet at the ventral and dorsal portions extending in front of and behind the inseam, and at the inseam. It is a free end that is not joined to other members. As a result, when the absorbent article is worn, the contraction force of the elastic member acts in the vertical direction orthogonal to the horizontal direction, that is, in the direction corresponding to the front-back direction of the wearer, and the leak-proof cuff at the lower crotch starts from the fixed portion. Stand up with the free end side facing the wearer's skin. A pocket is formed between the standing leak-proof cuff and the surface sheet to prevent lateral leakage of body fluid from the inseam.

In addition, when an absorbent article is worn, a rash may occur on the skin due to stuffiness or the like. Therefore, in order to prevent such skin troubles, for example, as described in Patent Document 3, it is possible to arrange an emollient agent having a skin care effect on a portion of the absorbent article that can come into contact with the wearer's skin. Conventionally. Further, Patent Document 4 describes that an emollient agent is arranged on a surface sheet of a disposable diaper provided with a leak-proof cuff.

Japanese Unexamined Patent Publication No. 2000-288012 Japanese Unexamined Patent Publication No. 2005-218876 Japanese Unexamined Patent Publication No. 2012-125292 Japanese Unexamined Patent Publication No. 2012-143543

Some useful skin care agents applied to absorbent articles can hydrophilize the adhered portion of the skin care agent, that is, reduce the hydrophobicity of the adhered portion, and skin care having such a hydrophilic action. When the agent is placed on the surface sheet of an absorbent article provided with a hydrophobic leak-proof cuff, the skin care agent leaks from the surface sheet when the leak-proof cuff falls down to the surface sheet side and comes into contact with it. There is a risk that excrement such as urine and feces may leak from the hydrophilic portion of the leak-proof cuff.

Therefore, an object of the present invention is to provide an absorbent article having an excellent skin care effect by suppressing the leakage of excrement caused by the skin care agent arranged on the surface sheet adhering to the leak-proof cuff.

The present invention has a vertical direction corresponding to the front-back direction of the wearer and a lateral direction orthogonal to the vertical direction, and the crotch portion arranged in the crotch part of the wearer, and the ventral and dorsal sides extending in the front-rear direction thereof. An absorber having a portion and including a liquid-retaining absorbent core, and a pair of protective devices that stand up toward the wearer's skin starting from a fixed portion located laterally outward of the absorber. An absorbent article comprising a leak cuff and a surface sheet arranged between the pair of leak-proof cuffs and overlapping the absorber at a position closer to the wearer's skin than the absorbent core, wherein the surface sheet comprises. A skin care agent is arranged at a portion that does not overlap with the leak-proof cuff when the leak-proof cuff is laid down laterally inward, and the surface sheet is placed in the longitudinal direction of the absorber at the lower crotch. It extends laterally outward from both side edges along the line, and the extending portion of the surface sheet is folded laterally outward of the absorber along a fold curve extending in the vertical direction toward the skin-facing surface side of the surface sheet. It is an absorbent article in which the overlapping surface sheets are joined to each other to form a folded joint portion, and the leak-proof cuff is joined to the folded joint portion.

According to the present invention, a skin care agent arranged on a surface sheet, more specifically, a skin care agent capable of exhibiting a hydrophilic action on a leak-proof cuff, causes leakage of excrement caused by adhering to the leak-proof cuff. Is suppressed, and an absorbent article having an excellent skin care effect is provided.

FIG. 1 is a plan view schematically showing the skin-facing surface, that is, the surface sheet side of the deployable disposable diaper according to the embodiment of the absorbent article of the present invention, and the elastic members of each part are extended and expanded in a plane shape. It is a plan view in the unfolded state. FIG. 2 is a cross-sectional view schematically showing a cross section taken along line I-I of FIG. 1, showing a state in which the leak-proof cuff is laid down inward in the lateral direction of the diaper. FIG. 3 is a cross-sectional view schematically showing an enlarged leak-proof cuff on one side of FIG. 2 and its vicinity. 4 (a) to 4 (g) are schematic plan views of an embodiment of the folded joint portion according to the present invention, respectively, and show the relationship between the folded joint portion and the overlapping portion of the surface sheet. It is a figure which shows. FIG. 5 is a plan view schematically showing a main part of another embodiment of the absorbent article of the present invention, specifically, a lateral central portion of the absorbent article in which an absorber and a folded joint are present. It is a plan view in a developed state in which the elastic members of each part are extended and expanded in a plane.

Hereinafter, the absorbent article of the present invention will be described with reference to the drawings based on the deployable disposable diaper which is a preferred embodiment thereof. The deployable disposable diaper 1 shown in FIGS. 1 and 2 has a vertical direction X corresponding to the front-back direction of the wearer, that is, a direction extending from the ventral side to the dorsal side via the crotch portion, and a lateral direction Y orthogonal to the vertical direction X. It also has a crotch part B arranged in the crotch part of the wearer, and a ventral side part A and a dorsal side part C extending in front of and behind the crotch part B. The ventral side A, the inseam B, and the dorsal side C correspond to each region when the diaper 1 is divided into three equal parts in the vertical direction X. The inseam B has an excretion portion facing portion that is arranged to face the excretion portion of the wearer's penis, anus, etc. when the diaper 1 is worn, and the excretion portion facing portion is usually in the vertical direction X of the diaper 1. It is located in or near the center.

As shown in FIGS. 1 and 2, the diaper 1 has a liquid-retaining absorber 4 and a fixing portion located on the outer side of the absorbent body 4 on both side edges 4S and 4S along the vertical direction X in the horizontal direction Y. It is arranged between a pair of leak-proof cuffs 5 and 5 that stand up from 5S toward the wearer's skin and a pair of leak-proof cuffs 5 and 5, and absorbs at a position closer to the wearer's skin than the absorber 4. A front surface sheet 2 that overlaps with the body 4 and a back surface sheet 3 that is arranged on the non-skin facing surface side of the absorber 4 and overlaps with the absorber 4 at a position farther from the wearer's skin than the absorber 4 are provided. In a plan view as shown in the above, the central portion of the vertical direction X located at the lower crotch B is constricted inward and has a vertically long hourglass shape that is long in one direction, that is, the vertical direction X. The front surface sheet 2 and the back surface sheet 3 each have a size larger than that of the absorber 4 interposed between the two sheets 2 and 3, and form the outer shape of the diaper 1 in the expanded and extended state as shown in FIG. ing. As the front surface sheet 2 and the back surface sheet 3, those usually used in this kind of absorbent article can be used without particular limitation. As the surface sheet 2, for example, a liquid-permeable hydrophilic non-woven fabric or perforated film can be used, and these non-woven fabrics and films are generally thermoplastic resins such as polyethylene and polypropylene and other polyolefin resins and polyethylene terephthalate. It is composed of polyester resin and the like. As the back sheet 3, for example, a liquid-impermeable film or a liquid-impermeable non-woven fabric can be used, and the liquid-impermeable film may have moisture permeability.

In the present specification, the "skin facing surface" is a surface of the absorbent article or its constituent member (for example, the surface sheet 2) that is directed toward the skin side of the wearer when the absorbent article is worn, that is, relatively worn. The side close to the skin of a person, and the "non-skin facing surface" is the surface of the absorbent article or its constituent members that is directed to the side opposite to the skin side (clothing side) when the absorbent article is worn, that is, relative to the skin. On the side far from the wearer's skin. In addition, "when worn" here means a state in which a normal proper wearing position is maintained.

The absorber 4 has a long shape in the vertical direction X in a plan view as shown in FIG. 1, and extends from the ventral side A to the dorsal side C. The absorber 4 includes a liquid-retaining absorbent core 40 containing an absorbent material, and a core wrap sheet 41 that covers the skin-facing surface and the non-skin-facing surface of the absorbent core 40. The absorbent core 40 and the core wrap sheet 41 are joined by a known joining means such as a hot melt type adhesive.

The absorbent core 40 is the main body of the absorber 4, and in a plan view as shown in FIG. 1, the central portion in the vertical direction X, more specifically, the portion located in the inseam B is constricted inward. It has an hourglass shape. The absorbent core 40 is formed by stacking core-forming materials including an absorbent material. As the absorbent material, those usually used as a material for forming this kind of absorbent core can be used without particular limitation. For example, hydrophilic fibers such as wood pulp and synthetic fibers treated with a hydrophilizing agent and water absorption can be used. Examples include sex polymer particles. The absorbent core 40 may be a laminated fiber of hydrophilic fibers, or a laminated fiber in which water-absorbing polymer particles are supported.

As the core wrap sheet 41, a water-permeable sheet material can be used, and for example, paper, non-woven fabric, or the like can be used. In the diaper 1, the core wrap sheet 41 is one continuous sheet having a width of 2 times or more and 3 times or less the length of the lateral Y of the absorbent core 40, and this one core wrap sheet 41. Covers the entire skin-facing surface of the absorbent core 40 and extends outward in the horizontal direction Y from both side edges along the vertical direction X of the absorbent core 40, as shown in FIG. The portion is wound below the absorbent core 40 to cover the entire non-skin facing surface of the absorbent core 40. The form of the core wrap sheet 41 is not limited to this, and for example, the skin-side core wrap sheet that covers the skin-facing surface of the absorbent core 40 and the non-skin-side that covers the non-skin-facing surface of the absorbent core 40. A core wrap sheet may be included, and both sheets may be separate sheets.

As shown in FIG. 1, a thread-like elastic member 11 is extended in the lateral direction Y between the front surface sheet 2 and the back surface sheet 3 in the waist circumference corresponding to the wearer's waist circumference in the dorsal side C. A plurality of the diapers are fixed, so that when the diaper 1 is worn, gathers around the waist are formed by contraction of the elastic member 12. Further, a thread-like elastic member 12 is fixed in an extended state along the vertical direction X between the leakage-proof cuff forming sheet 50 and the back surface sheet 3 at the left and right leg portions arranged around the wearer's legs. As a result, a pair of leg gathers are formed on the leg portion when the diaper 1 is worn due to the contraction of the elastic member 12. The front surface sheet 2, the back surface sheet 3, the absorber 4, the sheet 50, and the elastic members 11 and 12 are joined to each other by a known joining means such as a hot melt type adhesive.

As shown in FIG. 1, a pair of fastening tapes 6 and 6 are provided on both side edges of the dorsal portion C of the diaper 1 along the vertical direction X. A fastening portion 61 made of a male member of a mechanical hook-and-loop fastener is attached to the fastening tape 6. Further, a landing region 7 made of a female member of a mechanical hook-and-loop fastener is formed on the non-skin facing surface of the ventral side A of the diaper 1. In the landing region 7, a female member of a mechanical hook-and-loop fastener is attached to the non-skin facing surface of the back sheet 3 forming the non-skin facing surface of the ventral side A by a known joining means such as an adhesive or a heat seal. It is formed by joining and fixing, and the fastening portion 61 of the fastening tape 6 can be detachably fastened.

As shown in FIG. 2, the pair of leak-proof cuffs 5 and 5 are a single leak-proof cuff forming sheet 50 continuous over the entire length of the diaper 1 in the vertical direction X, and the sheets 50 in the vertical direction X, respectively. It is configured to include one or a plurality of (two in the illustrated form) thread-like elastic members 51 for forming a leak-proof cuff, which are fixed in an extended state.

As shown in FIGS. 2 and 3, the leakage-proof cuff forming sheet 50 is arranged so as to straddle the side edge 4S along the vertical direction X of the absorber 4 in the horizontal direction Y, and the inner edge portion along the vertical direction X. In the plan view of the diaper 1 in the expanded and extended state as shown in FIG. 1, it has 5A and an outer edge portion 5B located outside the inner edge portion 5A in the lateral direction Y and along the vertical direction X. The inner edge portion 5A overlaps with the absorber 4, and the outer edge portion 5B is located outside the side edge 4S of the absorber 4 in the lateral direction Y. The inner edge portion 5A is at least in the inseam B, specifically, for example, in the inseam B and the portion of the ventral side A and the dorsal side C near the crotch B, the surface sheet 2 and the diaper 1 It is a free end portion that is not joined to other constituent members, and is joined to the surface sheet 2 at the front and rear ends of the ventral side portion A and the dorsal side portion C in the vertical direction X (not shown). The outer edge portion 5B is joined to another member (the back surface sheet 3 in the illustrated form) constituting the diaper 1 over the entire length in the vertical direction X. The leak-proof cuff forming elastic member 51 is fixed to the inner edge portion 5A (free end portion) of the sheet 50 in a state of being extended in the vertical direction X. With the above configuration, when the diaper 1 is worn, the contraction force of the elastic member 51 acts in the vertical direction X, and the leakage-proof cuff 5 is provided at least in the inseam B, which is a region where the inner edge 5A is a free end. As shown in FIGS. 2 and 3, starting from the fixing portion 5S with another member (back surface sheet 3) of the sheet 50, the inner edge portion 5A side stands up toward the skin of the wearer (not shown).

As the leak-proof cuff forming sheet 50, a hydrophobic sheet material is used from the viewpoint of surely fulfilling the role of preventing the leakage of body fluid such as urine to the outside. As the hydrophobic sheet material, for example, as the hydrophobic non-woven fabric, air-through non-woven fabric, spunbonded non-woven fabric, SMS non-woven fabric, SMMS non-woven fabric, SSMS non-woven fabric and the like can be used. In addition, a hydrophobic resin film and the resin thereof can be used. A laminate of the film and the non-woven fabric or the like can be used. Here, "S" means a spunbonded non-woven fabric, and "M" means a melt-blown non-woven fabric.

As described above, the fixing portion 5S with the other member of the leak-proof cuff forming sheet 50 (the back surface sheet 3 in the illustrated form) serves as a starting point when the leak-proof cuff 5 (sheet 50) stands up. It has a predetermined length in the horizontal direction Y and extends in the vertical direction X. The fixed portion 5S in the diaper 1 has a continuous linear shape extending in the vertical direction X in the plan view as shown in FIG. 1, but the plan view shape of the fixed portion 5S is not limited to this, for example, a wavy line or a bay. It may be a curved line, a zigzag line, etc., or it may not be a single continuous line, or it may be a breaking line having a structure in which small fixed parts and non-fixed parts having a relatively short length are alternately arranged in the vertical direction X. good. Further, the means for fixing the leak-proof cuff 5 (sheet 50) and the other member (back surface sheet 3) in the fixing portion 5S is not particularly limited, and a known method may be appropriately adopted for this type of absorbent article. For example, fixing with an adhesive, fusion by heat sealing, ultrasonic processing, or the like can be exemplified.

In the diaper 1, as shown in FIGS. 1 and 2, the skin care agent 10 is arranged on the surface sheet 2. In this way, by arranging the skin care agent 10 on the surface sheet 2 which is a part of the diaper 1 that can come into direct contact with the wearer's skin, skin troubles such as skin irritation of the wearer while wearing the diaper 1 can be caused. Can be effectively suppressed.

However, when the skin care agent 10 is arranged on the surface sheet 2, depending on the type of the skin care agent 10, the skin care agent 10 leaks from the surface sheet 2 when the leak-proof cuff 5 falls down on the surface sheet 2 side and comes into contact with the skin care agent 10. As a result, the leak-proof cuff 5, which is considered to be hydrophobic from the viewpoint of leak-proof property, becomes hydrophilic, and body fluids such as urine and loose stool are diapered from the hydrophilic portion of the leak-proof cuff. There is a concern that it may leak to the outside of 1. Therefore, in diaper 1, in order to eliminate such concerns, the arrangement of the skin care agent 10 is devised.

Specifically, as shown in FIG. 1, in the diaper 1, the leak-proof cuff 5 does not overlap with the leak-proof cuff 5 when the leak-proof cuff 5 is laid down in the lateral direction Y in the surface sheet 2. A skin care agent 10 capable of exhibiting a hydrophilizing effect on the cuff 5 is arranged. When the skin care agent 10 adheres to the leak-proof cuff 5, it can make it hydrophilic. The skin care agent 10 is arranged in the central portion of the diaper 1 in the horizontal direction Y, and the arrangement portion of the skin care agent 10 has a strip shape extending in the vertical direction X in a plan view as shown in FIG. It extends continuously over the entire length of direction X.

The method of arranging the skin care agent 10 on the surface sheet 2 is not particularly limited, and a known method can be appropriately selected depending on the type of the skin care agent 10 and the like. Typically, the skin of the surface sheet 2 is coated with a fluid skin care agent 10 prepared by dissolving it in a suitable solvent or heating it as needed, by applying, spraying, dipping or the like. Adhere to the facing surface. Examples of the means for adhering the skin care agent 10 include a die coater method, a slot spray method, a curtain spray method, a melt blown method, a spiral spray method, a gravure method, and a bead method.

The amount of the skin care agent 10 adhered to the surface sheet 2 may be appropriately selected within a range in which a sufficient skin care effect is exhibited according to the type of the skin care agent 10, and is not particularly limited, but the basis weight is preferably 0.05 g /. It is m ² or more, more preferably 0.10 g / m ² or more, and preferably 5.0 g / m ² or less, still more preferably 3.0 g / m ² or less.

As described above, in the diaper 1, the arrangement of the skin care agent 10 is devised in order to prevent the inconvenience caused by the skin care agent 10 arranged on the surface sheet 2 adhering to the leak-proof cuff 5. It may not be possible to sufficiently prevent inconveniences with just a diaper. That is, the portion where the skin care agent 10 is arranged on the surface sheet 2 is a portion that does not overlap with the leak-proof cuff 5 in the state of being laid down in the lateral direction Y. The inner edge portion 5A of the above may enter the inside of the lateral direction Y further than the assumed position when setting the placement portion of the skin care agent 10. In that case, the inner edge portion 5A of the leak-proof cuff 5 may be located. The skin care agent 10 may adhere and become hydrophilic.

The diaper 1 may have creases that are used to fold the unused diaper 1, for example, when storing the unused diaper 1. This crease is typically formed along a line that traverses the inseam B in the lateral direction, such as the line indicated by reference numeral FL in FIGS. 1 and 3. The folds of the diaper 1 formed along the lines indicated by the symbols FL in FIGS. 1 and 3 form a straight line that divides the diaper 1 into two in the vertical direction X and extends in the horizontal direction Y in a plan view. The fold FL is folded in half with the skin-facing surface side (surface sheet 2 side) inside. Such a case where the diaper 1 is folded at the crease of the inseam B is an example of the above-mentioned case where the leak-proof cuff 5 enters the inside of the lateral direction Y more than expected. At this time, the surface sheet 2 The portion of the leak-proof cuff 5 located at the inseam B is in contact with the placement portion of the skin care agent 10 of the above, and the skin care agent 10 is transferred to the inner edge portion 5A of the leak-proof cuff 5 and is hydrophilic. There is a risk of being transformed. Further, since the inseam B is arranged in a state of being sandwiched between both thighs of the wearer when the diaper 1 is worn, an external force that compresses the inseam B in the lateral direction acts on the inseam B. It is easy, and due to the action of such an external force, the portion of the leak-proof cuff 5 located at the inseam B may excessively enter the inside of the lateral direction Y, and even in such a case, the skin care agent from the surface sheet 2 Hydrophilization of the leak-proof cuff 5 can occur due to the transfer of 10.

Therefore, in the diaper 1, in order to more reliably prevent the inconvenience caused by the skin care agent arranged on the surface sheet adhering to the leak-proof cuff, in addition to the above-mentioned ingenuity in the arrangement of the skin care agent 10, further prevention A configuration is adopted in which the portion of the leak cuff 5 located at the lower crotch B does not easily enter the inside of the lateral direction Y. Specifically, as shown in FIGS. 2 and 3, in the crotch portion B, the surface sheet 2 is outward from both side edges 4S and 4S along the vertical direction of the absorber 4 in the horizontal direction Y. The extending portion 2E of the surface sheet is folded on the skin-facing surface side of the surface sheet 2 along a folding curve 21 extending in the vertical direction X outside the lateral direction Y of the absorber 4. The overlapping surface sheets 2 and 2 are joined to form a fold-proof joint portion 20, and a leak-proof cuff 5 (leak-proof cuff forming sheet 50) is joined to the fold-proof joint portion 20. be.

Due to the configuration including the folded joint portion 20 in the crotch portion B, the portion of the pair of leak-proof cuffs 5 and 5 located at the crotch portion B is compared with the state in which the folded joint portion 20 is not formed. Since the structure protrudes to the outside of the lateral direction Y, it is easy to be pulled to the outside of the lateral direction Y, but it is difficult to enter the inside of the lateral direction Y. Therefore, in the diaper 1, the separation width W of the pair of leakage-proof cuffs 5 and 5 (see FIG. 1), that is, the inner edge portion of one of the leakage-proof cuffs 5, while maintaining the standing property inherent in the leakage-proof cuff 5. It is prevented that the length between 5A and that of the other (the width of the exposed portion of the surface sheet 2 that is not covered with the leak-proof cuff 5) is excessively narrowed, and as a result, skin care from the surface sheet 2 The hydrophilization of the leak-proof cuff 5 due to the transfer of the agent 10 can be effectively prevented. The separation width W of the pair of leak-proof cuffs 5 and 5 in the inseam B is preferably 60 mm or more from the viewpoint of the balance between the effect of preventing the leak-proof cuff 5 from becoming hydrophilic and the effect of the skin care agent 10. It is preferably 70 mm or more, preferably 90 mm or less, and more preferably 100 mm or less.

In particular, in the diaper 1, the absorbent core 40, which is the main body of the absorber 4, is constricted at the portion located in the inseam B in the plan view as shown in FIG. 1, that is, the absorbent core 40 in the inseam B is constricted. Since the length (width) of the lateral direction Y is shorter than the width in the front-rear direction (ventral side A and dorsal side C), the erectability of the leak-proof cuff 5 in the inseam B is enhanced. Therefore, the decrease in the uprightness of the leak-proof cuff 5 due to the adoption of the configuration including the folded joint portion 20 is effectively suppressed.

In the diaper 1, as shown in FIG. 1, the folded joint portion 20 is formed only in the portion of the extension portion 2E of the surface sheet 2 located at the crotch portion B, and the fold joint portion 20 is formed over the entire length of the extension portion 2E in the vertical direction X. Not formed. From the viewpoint of preventing the leakage-proof cuff 5 from excessively entering the inside of the lateral direction Y, that is, narrowing the separation width W of the pair of leakage-proof cuffs 5 and 5, the entire length of the extension portion 2E in the vertical direction X It may be effective to form the fold joint portion 20, but since the fold joint portion 20 itself is relatively hard, when this is formed over the entire length of the extension portion 2E in the vertical direction X, the diaper 1 becomes the whole. It may become hard and cause inconvenience such as a decrease in wearing feeling. Therefore, in the diaper 1, a fold joint portion 20 is selectively formed in the inseam B, which is a portion where the leakage-proof cuff 5 is likely to enter the inside in the lateral direction Y.

In the diaper 1, the creases used when folding the diaper 1 are formed along the straight lines indicated by the symbols FL in FIGS. 1 and 3, that is, so as to cross the inseam B in the lateral direction Y. Where it is formed, the fold-over joint portion 20 extends in the vertical direction X across the crease FL. Since the relatively hard fold-over joint 20 is arranged in this way in relation to the crease when the diaper 1 is folded, the rigidity of the crease in the crotch portion B and its vicinity is improved. The structure of the leak-proof cuff 5 overhanging outward in the lateral direction Y due to the formation of the lap joint portion 20 is easily maintained, and the above-mentioned action and effect can be more reliably achieved.

In the diaper 1, a pair of folded joint portions 20 are formed on both side portions of the surface sheet 2 (extending portion 2E) along the vertical direction X in the crotch portion B. Then, as shown in FIGS. 1 and 3, the pair of folded joints 20 and 20 have a rectangular shape in a plan view, the longitudinal direction thereof coincides with the vertical direction X, and the front and rear folds FL are sandwiched between them. It is formed symmetrically. Further, as shown in FIGS. 2 and 3, the joint between the folded joint portion 20 and the leak-proof cuff 5 (leak-proof cuff forming sheet 50) is a surface sheet 2 (rolled) extending from the folded joint portion 20. The side edge of the protruding portion 2E along the vertical direction X) is joined to the sheet 50, and the surface sheet 2 and the sheet 50 are joined by fixing with an adhesive, heat sealing, ultrasonic processing, etc. It is made by fusion with.

Further, in the diaper 1, as shown in FIGS. 1 to 3, the folded joint portion 20 and the fixing portion 5S which is the starting point of the standing of the leak-proof cuff 5 overlap each other. That is, in the plan view of the diaper 1 as shown in FIG. 1, the folded joint portion 20 and the fixed portion 5S overlap each other, and the folded joint portion 20 is located on the non-skin facing surface side of the fixed portion 5S. With such a configuration, the above-mentioned overhanging structure of the leak-proof cuff 5 in the lateral direction Y due to the formation of the folded joint portion 20 can be easily maintained, and the above-mentioned action and effect can be more reliably achieved. Become.

The surface sheets 2 that overlap each other in the folded joint portion 20 can be joined by known joining means, and examples thereof include joining with an adhesive, heat sealing, and fusion by ultrasonic processing. In general, joining with an adhesive has a lower degree of hardening of the member to be joined (surface sheet 2) than joining by fusion, and the flexibility inherent in the member to be joined is likely to be maintained. Therefore, when the overlapping surface sheets 2 in the fold joint portion 20 are joined to each other via an adhesive, the flexibility of the fold joint portion 20 and its vicinity is relatively easy to be maintained, and the diaper 1 feels comfortable to wear. It is advantageous in that. On the other hand, when the surface sheets 2 that overlap each other in the fold joint portion 20 are joined by fusion, the fold joint portion 20 described above is inferior in terms of flexibility as compared with the joint by the adhesive. The shape-retaining property of the structure overhanging the leakage-proof cuff 5 in the lateral direction Y due to the formation is improved, and the above-mentioned action and effect can be more reliably achieved. It should be noted that the overlapping surface sheets 2 at the folded joint portion 20 can be joined by combining fixing with an adhesive and fusion.

As shown in FIG. 3, the folded joint portion 20 is preferably formed at least on the side opposite to the folded curve 21 in the overlapping portion 2D of the surface sheet 2. In the diaper 1, as shown in FIG. 3, the length, that is, the width in the lateral direction Y of the folded joint portion 20 having a rectangular shape in a plan view is smaller than the width of the overlapping portion 2D, and is from the folding curve 21 in the overlapping portion 2D. It is formed at the farthest position, that is, along the side edge 22 closer to the absorber on the side opposite to the folding curve 21 of the side edges along the vertical direction of the overlapping portion 2D. In this way, by partially forming the fold joint portion 20 in the overlapping portion 2D, the fold joint portion 20 is formed in the entire area of the overlapping portion 2D (see FIG. 4C), as compared with the case where the fold joint portion 20 is formed. The flexibility of the folded joint portion 20 and its vicinity is relatively easy to be maintained, and the diaper 1 has a good wearing feeling. Further, even if the folded joint portion 20 is partially formed in the overlapping portion 2D, as shown in FIG. 3, the folded joint portion is formed as far as possible from the folding curve 21 which is a relatively hard portion. Maintaining flexibility in and around 20 can be even easier.

The form of the fold-over joint portion 20, particularly the plan-view shape of the fold-over joint portion 20, the position of the fold-over joint portion 20 in the overlapping portion 2D, and the like are not limited to the form shown in FIG. can do. 4 (a) to 4 (g) show the form of the folded joint portion 20 included in the present invention. The modes shown in FIGS. 4 (a) to 4 (g) are 1) a point where the fold joint portion 20 extends in the vertical direction X across the fold FL of the diaper 1, and 2) the fold joint portion 20. However, in the overlapping portion 2D of the surface sheet 2, it is common in that it is formed at least on the side opposite to the folding curve 21 (22 side of the overlapping portion 2D).

In the form shown in FIGS. 4 (a) and 4 (b), the length (width) of the fold joint portion 20 in the lateral direction Y is shorter than that of the overlapping portion 2D, and the folds are relatively narrow. It is common in that the joint portion 20 is intermittently arranged in the lateral direction Y. The difference between the two forms is the number of folded joints 20, and the form shown in FIG. 4 (a) is two and the form shown in FIG. 4 (b) is three.
In the form shown in FIG. 4C, the folded joint portion 20 is arranged over the entire area of the overlapping portion 2D.
In the form shown in FIGS. 4 (d) to 4 (f), the length of the folded joint portion 20 in the vertical direction X is shorter than that of the overlapping portion 2D, and the folded joint portion 20 has a relatively short vertical length. It is common in that the joint portion 20 is intermittently arranged in the vertical direction X. In the form shown in FIG. 4 (d), a plurality of (three) folded joint portions 20 each cross the overlapping portion 2D in the lateral direction Y, whereas in the form shown in FIG. 4 (e). , A plurality of (three) folded joint portions 20 are arranged only on the side edge 22 side (opposite side of the folding curve 21 side) of the overlapping portion 2D toward the absorber. Further, in the form shown in FIG. 4 (f), a plurality (3) fold joint portions 20 are arranged on each of the side edge 22 side of the overlapping portion 2D near the absorber and the side of the folding curve 21 on the opposite side. The folded joint portion 20 is not arranged at the central portion of the overlapping portion 2D in the lateral direction Y.
In the form shown in FIG. 4 (g), the folded joint portion 20 has a closed annular shape in a plan view, and the central portion of the overlapping portion 2D surrounded by the folded joint portion 20 in the plan view annular shape is formed. , The folded joint portion 20 is not arranged.

The length of the folded joint portion 20 in the vertical direction X is preferably 20 mm or more, more preferably 30 mm or more, and preferably 100 mm or less, further preferably 80 mm or less.
The length (width) of the folded joint portion 20 in the lateral direction is preferably 1 mm or more, more preferably 2 mm or more, and preferably 10 mm or less, further preferably 8 mm or less.
The length (width) of the overlapping portion 2D of the surface sheet 2 in the lateral direction is preferably 2 mm or more, more preferably 4 mm or more, and preferably 10 mm or less, further preferably 8 mm or less.

FIG. 5 shows the main parts of other embodiments of the absorbent article of the present invention. Regarding other embodiments described later, components different from the diaper 1 of the above-described embodiment will be mainly described, and similar components will be designated by the same reference numerals and description thereof will be omitted. The description of the diaper 1 is appropriately applied to the components not particularly described.

FIG. 5 shows a portion corresponding to the central portion of the diaper 1 shown in FIG. 1 in the lateral direction Y in another embodiment of the absorbent article of the present invention, more specifically, the absorber 4 in the diaper 1 and the folding. It is a figure which showed typically the part corresponding to the part where the joint part 20 exists. Another embodiment of the absorbent article of the present invention shown in FIG. 5 is a flat surface of the absorbent core 40 in that the plan view shape of the absorbent core 40 constituting the absorber 4A is a rectangular shape long in the vertical direction X. It is different from diaper 1, which has a vertically long hourglass shape. That is, the absorbent core 40 constituting the absorber 4A is not constricted in the inseam B, but instead, the core forming material of the absorbent core 40 is placed in the inseam B more than other parts of the absorbent core 40. A core forming material adjusting portion 40E, which is few or absent at all, is formed. The core forming material adjusting portion 40E in which the core forming material does not exist at all is a so-called through hole. In the absorber 4A, the core forming material adjusting portion 40E has a long shape in one direction in a plan view, and its longitudinal direction coincides with the vertical direction X. Three core forming material adjusting portions 40E are intermittently arranged in the lateral direction Y in the portion of the absorber 4A located at the crotch portion B. By forming the core forming material adjusting portion 40E on the absorbent core 40, the liquid diffusibility and fit of the absorbent core 40 can be improved.

As described above, in the portion of the absorbent core 40 located at the lower part of the crotch B, the core forming material is adjusted so that the amount of fiber of the core forming material is smaller than that of other parts of the absorbent core 40 or the core forming material is not laminated at all. When the portion 40E is formed, the rigidity of the portion is reduced, so that the portion of the leak-proof cuff 5 located at the lower part of the crotch B tends to excessively enter the inside of the lateral direction Y. This is the same as that in the napkin 1 shown in FIG. 1, the constricted portion of the hourglass-shaped absorbent core 40 in a plan view, that is, the portion where the core forming material is not stacked at all is located in the inseam B. .. Therefore, also in the form shown in FIG. 5, a partially folded joint portion 20 is formed in the crotch portion B in which the amount of fibers of the core forming material is relatively small, as in the napkin of FIG.

The skin care agent used in the present invention will be described. The skin care agent used in this kind of absorbent article includes a hydrophilic one and a hydrophobic one, but the skin care agent used in the present invention is preferably hydrophilic. Since the skin care agent is hydrophilic, it has the effect of increasing the affinity for the skin. As described above, some hydrophilic skin care agents can exhibit a hydrophilic action on the leak-proof cuff in the absorbent article.

As the skin care agent used in the present invention, those which are preferably hydrophilic and have effects such as protection and healing on the wearer's skin can be used without particular limitation. For example, a preferred skin care agent includes a diamide derivative represented by the following formula (I). The diamide derivative represented by the following formula (I) is the diamide derivative of the invention described in International Publication No. 00/061097, and has a medicinal effect of improving the water retention capacity and barrier function of the stratum corneum. ing. When the diamide derivative is transferred to the wearer's skin while wearing the diaper 1, it functions as an oil-based skin care agent and can suppress / improve skin irritation.

When the diamide derivative is used as a skin care agent, only one diamide derivative may be used, or two or more diamide derivatives may be used in combination.

As another hydrophilic skin care agent that can be used in the present invention, for example, a skin care agent used as an emollient agent in the field of cosmetics can be used. Specific examples of other hydrophilic skin care agents include liquid paraffin, silicone oil, animal and vegetable oils (olive oil, hooba oil, benibana oil, squalane and squalane, etc.), monoglyceride, diglyceride, triglyceride, aliphatic ethers (myristyl-1, myristyl-1,). 3-Dimethylbutyl ether, palmitol-1,3-dimethylbutyl ether, stearyl-1,3-dimethylbutyl ether, palmityl-1,3-methylpropyl ether, stearyl-1,3-methylpropyl ether, etc.), isostearyl-cholesterol ester , Paraffin wax, C _12- C ₂₂ fatty acids, C _12- C ₄₄ fatty acid ethers, C _12- C ₂₂ fatty alcohols, vaseline, fatty acid sorbitan esters (any of monoesters, diesters, and triesters), polyoxy Ethylene fatty acid sorbitan ester (any of monoester, diester, and triester), metal stone test (magnesium stearate, etc.), sucrose fatty acid ester, cyclodextrin fatty acid ester, silicone, silicone resin, JP-A-2004- Examples thereof include an emollient agent used in the invention described in Japanese Patent Application Laid-Open No. 298643 or Japanese Patent Application Laid-Open No. 2008-522772, and a lotion composition containing an emollient agent and an fixing agent. The various hydrophilic skin care agents may be used alone or in combination of two or more.

Among the various hydrophilic skin care agent, a mixture of diamide derivatives of C ₁₂ -C ₂₂ fatty alcohols (preferably stearyl alcohol) and the formula (I), top sheet when placed in the topsheet It is preferable because it does not interfere with the permeability of the body fluid. From the viewpoint of transferability of the skin care agent to the skin, skin care effect, feel during use, and body fluid permeability of the surface sheet, the mixed mass ratio of stearyl alcohol and the diamide derivative of the above formula (I) is stearyl alcohol / diamide. The derivative is preferably in the range of 90/10 to 50/50. It is preferable that the mixture is heated to increase its fluidity and then applied and adhered on the surface sheet. Further, after adhering the mixture to the surface sheet 2, it is preferable to leave the mixture at room temperature to reduce the fluidity of the mixture so that it can be easily held on the surface sheet.

When arranging the skin care agent on the surface sheet, various coating methods can be used without particular limitation. For example, a die coater method, a slot spray method, a curtain spray method, a melt blown method, a spiral spray method, and a gravure method can be used. , Bead method and the like.

Although the present invention has been described above based on the embodiment, the present invention can be appropriately modified without being limited to the embodiment. For example, from the viewpoint of improving absorbency and leakage resistance, a liquid permeable sheet made of paper or various non-woven fabrics, which is also called a sublayer, is formed between the surface sheet 2 and the absorber 4 (core wrap sheet 41). It may be intervened. From the same viewpoint, a groove formed by integrally compacting the surface sheet 2 and the absorber 4 may be formed on the skin-facing surface of the diaper 1.
The present invention is not limited to the deployable disposable diapers as in the above embodiment, and broadly includes articles used for absorbing body fluids (urine, loose stools, menstrual blood, sweat, etc.) discharged from the human body, and is of a pants type. Disposable diapers, sanitary napkins, sanitary shorts and the like are also included.
All the parts of only one embodiment described above can be mutually used as appropriate.

1 Deployable disposable diaper (absorbent article)
2 Surface sheet 2D Overlapping part of surface sheet 2E Extended part of surface sheet 20 Folded joint 21 Folded curve 3 Back sheet 4 Absorber 4S Side edge of absorber
40 Absorbent core 40E Core forming material adjustment part 41 Core wrap sheet 5 Leak-proof cuff 5S Fixing part (standing point of leak-proof cuff)
5A Inner edge 5B Outer edge 50 Leak-proof cuff forming sheet 51 Leak-proof cuff forming elastic member 10 Skin care agent A Ventral side B Inseam C Dorsal side X Vertical direction Y Horizontal direction FL Absorbent article crease

Claims (6)

It has a vertical direction corresponding to the front-back direction of the wearer and a lateral direction orthogonal to the vertical direction, and also has an inseam arranged in the crotch part of the wearer and a ventral and dorsal parts extending in the front-rear direction thereof. ,
An absorber composed of a liquid-retaining absorbent core, a pair of leak-proof cuffs that stand up toward the wearer's skin starting from a fixed portion located laterally outward of the absorber, and the like. An absorbent article that is disposed between a pair of leak-proof cuffs and includes a surface sheet that overlaps the absorber at a position closer to the wearer's skin than the absorbent core.
A skin care agent is arranged on a portion of the surface sheet that does not overlap with the leak-proof cuff when the leak-proof cuff is laid down laterally inward.
At the inseam, the surface sheet extends laterally outward from both side edges along the longitudinal direction of the absorber, and the extending portion of the surface sheet extends in the longitudinal direction laterally outward of the absorber. The surface sheets are folded on the skin-facing surface side of the surface sheet and the overlapping surface sheets are joined to form a folded joint portion, and the leak-proof cuff is attached to the folded joint portion. It is joined and
An absorbent article in which the folded joint portion and the fixed portion serving as a starting point for standing of the leak-proof cuff overlap. The absorbent article according to claim 1, wherein the absorbent core is a portion of the crotch portion located in a plan view. The absorbent article according to claim 1 or 2 , wherein the surface sheets overlapping at the folded joint portion are joined to each other via an adhesive. The absorbent article according to any one of claims 1 to 3 , wherein the surface sheets overlapping at the folded joint portion are joined by fusion. The absorbent article according to any one of claims 1 to 4 , wherein the folded joint portion is formed at least on the side opposite to the folded curve in the overlapping portion of the surface sheet. Claim that the crease used to fold the absorbent article is formed so as to traverse the inseam in the lateral direction, and the fold joint extends vertically across the fold. The absorbent article according to any one of 1 to 5.

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