JP4951590B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article including an absorbent body, a top sheet, and a back sheet. More specifically, the present invention relates to an absorbent article provided with an exhaust mechanism that discharges moisture remaining between the absorbent article and the skin of the wearer to the outside.

  In general, absorbent articles such as disposable diapers and urine pads are composed of an absorbent body, a top sheet at least partially made of a liquid-permeable material, and arranged to cover the surface of the absorbent body, and a liquid-impermeable material. And a back sheet disposed so as to cover the back surface of the absorber.

  Such an absorbent article is used so that the top sheet comes into contact with the wearer's skin, and excrement passes through the liquid-permeable portion of the top sheet and is absorbed and held by the absorbent body. And the excrement is prevented from leaking outside by the liquid-impermeable back sheet disposed on the back side of the absorber.

  By the way, when the absorbent article is worn, moisture generated from urine, sweat, body fluid or the like tends to stay between the absorbent article and the wearer's skin. This moisture is not preferable because it causes skin troubles such as rash and causes discomfort such as stuffiness and stickiness.

  In view of this, various proposals have been made in order to discharge moisture that remains in the space between the absorbent article and the skin of the wearer to the outside and to reduce the humidity inside the absorbent article. For example, a back sheet material, a leak-proof sheet, and the like using a film in which a large number of fine holes are formed have been proposed (see Patent Documents 1 and 2). In addition, an absorbent article in which a hygroscopic material sealed with a hygroscopic agent is disposed between the top sheet and the absorbent body has also been proposed (see Patent Document 3).

Japanese Patent Laid-Open No. 11-348163 JP 2007-020664 A JP 2003-116912 A

  The back sheet material described in Patent Document 1 and the leak-proof sheet described in Patent Document 2 can improve moisture permeability while preventing leakage by a large number of fine holes formed in the film. Moisture between the article and the wearer's skin can be discharged to some extent. However, these inventions are limited to those that improve the moisture permeability while securing the leak-proof property, which is the inherent performance of the backsheet material and the like. Therefore, there is a limit to the improvement of moisture permeability, and the current situation is that the moisture staying between the absorbent article and the wearer's skin cannot be efficiently discharged.

  Moreover, the absorbent article described in Patent Document 3 can be expected to reduce the humidity between the absorbent article and the wearer's skin by absorbing moisture using a hygroscopic agent. However, the method of absorbing moisture with a hygroscopic agent leaves a problem to be solved in that moisture cannot be removed promptly.

  The present invention provides an absorbent article that can efficiently and promptly discharge moisture remaining between the absorbent article and the wearer's skin and that can be worn comfortably.

  As a result of diligent studies to solve the problems of the prior art as described above, the present inventor forms a hollow tubular exhaust path by a partition made of a sheet material, and uses deformation of the exhaust path in accordance with the wearer's operation. With the exhaust mechanism similar to that of the pump, the above problem was solved by positively discharging the moisture remaining between the absorbent article and the skin of the wearer to the outside of the absorbent article. Completed the invention. Specifically, the following absorbent articles are provided by the present invention.

[1] An absorber, a top sheet that is at least partially made of a liquid-permeable material and arranged to cover the surface of the absorber, and a liquid-impermeable material that covers the back surface of the absorber A back sheet arranged so as to form and a partition wall formed of a sheet material and forming a hollow tubular exhaust path partitioned from the outside, and the partition wall absorbs toward the front and rear ends of the absorber. Rutotomoni is left-right pair located on opposite sides of the body, the front and rear ends are end stop so as to crush the exhaust path in a plane, the top side of the partition wall, towards the front and rear ends of the absorbent body The stretchable standing stretchable material is fixed, and the partition wall has a first hole formed in an inward surface of a central portion in the front-rear direction, and a second hole formed in at least one end portion of the front-rear end portion, In the first hole, the upright stretchable material shrinks, The central part in the front-rear direction of the partition wall stands up three-dimensionally to open toward the space sandwiched between the pair of partition walls, and the second hole is located on the downward surface formed by the end stopper, An absorbent article that opens toward the top sheet .

[2] The absorbent article according to [1], wherein the partition wall has a plurality of the first holes formed in a central portion in the front-rear direction.

[3] The absorbent article according to [1] or [2], wherein the partition wall has the first hole formed by a slit having a convex shape or a plurality of intersecting slits.

[ 4 ] The absorbent article according to any one of [1] to [ 3 ], wherein at least the outward surface of the partition wall is formed of a water-repellent material or a liquid-impermeable material.

[ 5 ] The partition wall is composed of a plurality of sheet materials, and the plurality of sheet materials are stacked on each other at least at the top of the partition wall to form a stacked portion, and the stretchable stretch for standing between the layers of the stacked portion The absorbent article according to any one of [1] to [ 4 ], wherein the material is fixed in an extended state.

[ 6 ] The partition wall is made of a single sheet material, an edge portion of the single sheet is folded back to form a folded portion, and the standing stretchable material is fixed in an expanded state inside the folded portion. The absorbent article according to any one of [1] to [ 4 ].

  The absorbent article of the present invention can efficiently and quickly discharge moisture remaining between the absorbent article and the wearer's skin, and can be comfortably worn.

  Hereinafter, the best mode for carrying out the absorbent article of the present invention will be specifically described with reference to an example of a tape-type disposable diaper. However, the present invention broadly encompasses absorbent articles (for example, pants-type disposable diapers, urine pads, etc.) having the invention-specific matters, and are not limited to the following embodiments.

  For the convenience of drawing, in FIG. 1A and FIG. 3A, the drawing was performed in a form in which the stretchable material for standing was discarded.

[1] Definitions etc .:
The “tape-type disposable diaper” includes an absorbent body 22, a top sheet 18, and a back sheet 20 as in the absorbent article 1 </ b> A shown in FIGS. 1A and 1B, and left and right side edges of the back body 6. The disposable diaper further provided with the fastening tape 11 which fixes the front body 2 and the back body 6 arrange | positioned so that it may extend from 6a, 6b shall be meant.

  The “front body” is a portion that covers the abdomen (front of the body) of the wearer when the absorbent article is attached to the wearer, such as the absorbent article 1A shown in FIG. 1A (reference numeral 2 in the figure). , "Crotch" is the part that covers the crotch of the wearer when the absorbent article is worn on the wearer (reference numeral 4 in the figure), and the "back body" is the wearer wearing the absorbent article When it does, it shall mean the part which covers a wearer's back side (back of the body) (symbol 6 in a figure).

[2] Configuration of the absorbent article of the present invention:
The absorbent article of the present invention includes a partition wall 62 formed of sheet materials 70 and 76 and forming a hollow tubular exhaust passage 60 partitioned from the outside, like the absorbent article 1A shown in FIGS. 1A to 1C. The partition wall 62 is arranged in a pair on both sides of the absorber 22 toward the front and rear end portions of the absorber 22, and the standing stretchable material stretched toward the front and rear end portions of the absorber 22 on the top side of the partition wall 62. 64 is fixed, and the partition wall 62 is formed with a first hole 66 that opens toward the space sandwiched between the pair of partition walls 62a and 62b on the inward surface thereof, and at the end of at least one of the front and rear ends. The hole 68 is formed.

  In such a configuration, moisture generated from urine and body fluid and staying between the absorbent article (mainly the top sheet 18) and the wearer's skin is sucked from the first hole 66 and passes through the exhaust path 60. Then, it is discharged from the second hole 68. Moreover, since the partition wall 62 formed by the sheet materials 70 and 76 is easily deformed by the wearer's operation, the moisture can be positively exhausted to the outside of the absorbent article 1A by an exhaust mechanism similar to a pump. That is, when the partition wall 62 crushed by the wearer's movement returns to its original shape, moisture staying between the top sheet 18 and the like and the wearer's skin is sucked into the exhaust path 60 from the first hole 66, Again, it is discharged from the second hole 68 when it is crushed by the wearer's action.

  By using such an exhaust mechanism, it is possible to increase the amount of moisture exhausted compared to the case of using a microporous back sheet, and efficiently remove the moisture remaining between the absorbent article and the wearer's skin. It becomes possible to discharge quickly. Therefore, skin troubles such as rashes and uncomfortable feelings such as stuffiness and stickiness are less likely to occur, and it can be worn comfortably.

  As shown in FIGS. 1A and 1B, the partition wall 62 is a member made of sheet materials 70 and 76 and forming a hollow tubular exhaust passage 60 partitioned from the outside.

  The “sheet material” is preferably a sheet material that is easily deformable in order for the exhaust mechanism to function. Moreover, if it is comprised with the sheet material which consists of a water repellent material and a liquid-impermeable material, it is also possible to provide the same effect as a three-dimensional gather. Examples of such a sheet material include a nonwoven fabric produced by a method such as card embossing and spunbond, a nonwoven sheet with high waterproofness such as SMS and SMMS, and a liquid-impermeable film made of a resin such as polyethylene. Can do. Moreover, a perforated nonwoven fabric can also be used partially.

  The partition wall only needs to form a hollow tubular exhaust path partitioned from the outside. For example, the absorbent article 1A shown in FIG. 1B has a spindle-shaped cross section that is partitioned from the outside by a sheet material 70 in which the partition wall 62 is integrally formed with the side sheet 19 and a sheet material 76 that is separate from the sheet material. An exhaust path 60 is formed. The exhaust path need not be formed only by the partition walls. For example, the absorbent article 1B shown in FIG. 3B has an exhaust passage 60 having a triangular cross section that is partitioned from the outside by a partition wall 62 and a top sheet 18.

  As shown in FIG. 1A, a pair of left and right partition walls 62 are arranged on both sides of the absorber 22 toward the front and rear ends of the absorber 22 (reference numerals 62 a and 62 b in the figure). In order to make the exhaust mechanism function, it is preferable to deform the partition wall (and thus the exhaust path) by the wearer's action. Therefore, the exhaust mechanism can be made to function satisfactorily by being disposed on the portion around the leg where the wearer's movement is large, specifically on both sides of the absorber. Moreover, it becomes possible to provide a three-dimensional gather function to the partition walls by arranging a pair of left and right sides on both sides of the absorber.

  As shown in FIGS. 1A and 1B, a standing stretchable material 64 that is stretched toward the front and rear ends of the absorber 22 is fixed to the top side of the partition wall 62. The partition wall stands up three-dimensionally due to the contraction force of the standing stretchable material, and the hollow tubular structure of the exhaust path is maintained. Further, the exhaust path formed by the easily deformable sheet material and the extending elastic member is freely deformed when a force is applied, and returns to the original shape when no force is applied. Therefore, an exhaust mechanism similar to a pump can function well. The type of the stretchable material for standing up, the arrangement method, and the like may be configured according to the leg-around stretchable material described later.

  As shown in FIG. 1B, the partition wall 62 is formed with a first hole 66 that opens toward the space between the pair of partition walls 62a and 62b on the inward surface. Moisture is taken in from the first hole 66, and moisture is discharged from the front and rear end portions of the absorbent article 1 </ b> A via the exhaust path 60 and the second hole 68.

  The “inward surface” means a surface that forms a partition wall and faces another partition wall. “Opening toward the space between the pair of partition walls” means opening toward the center in the width direction of the absorbent article. “Opening” includes not only the case where the first hole is always open, but also the case where the first hole is formed by a slit as will be described later and opens only during intake.

  As shown in FIGS. 1A and 1B, the partition wall 62 preferably has a plurality of first holes 66 formed at the center in the front-rear direction. Usually, an absorbent article is used so that the center part in the front-rear direction contacts the inseam of the wearer. In addition, urine and body fluid are excreted in the crotch portion, and the height position is lower than the front and rear end portions, so that moisture tends to stay. Therefore, by forming a plurality of first holes in the central portion in the front-rear direction, the moisture can be easily discharged out of the absorbent article.

The “front-rear direction central portion” means a portion of the center side 40% length excluding the 30% length portion on each of the front end side and the rear end side with respect to the entire length of the partition wall. The specific number of “plurality” is not limited. Although depending on the opening area of the first hole, if the opening area per hole is 0.5 to 10 mm ² , it is preferable to form 5 to 200, and more preferably 10 to 100. By setting it to 5 or more, the exhaust function can be secured. On the other hand, by setting it to 200 or less, it is possible to effectively prevent urine and body fluid from flowing into the exhaust path.

  As shown in FIGS. 2A and 2B, the partition wall 62 is preferably formed with a first hole 66 by slits 74A and 74B having convex shapes or a plurality of slits 74C and 74D intersecting each other. By forming the first hole not simply as an opening but by the slits 74A to 74D, tongue pieces 72A to 72D that function as a valve can be attached to the first hole 66 very easily. . The tongue piece allows moisture to pass through while preventing urine and body fluid from entering the exhaust path.

  Although the form of the slit is not particularly limited, examples of the “slit having a convex locus” include a) a slit 74A having a curved portion and b) a slit 74B having a bent portion, as shown in FIG. 2A. . As shown in FIG. 2A, c) a cross-shaped slit 74C where two slits intersect, d) a star-shaped slit 74D where three slits intersect, etc. Can be mentioned.

  As shown in FIGS. 2A and 2B, a spindle-like tongue piece 72A and a spindle-like first hole 66A can be formed by the slit 74A, and the triangle-like tongue piece 72B and the triangular-like piece can be formed by the slit 74B. The first hole 66B can be formed. In addition, the triangular tongue piece 72C and the rectangular first hole 66C can be formed by the slit 74C, and the triangular tongue piece 72D and the hexagonal first hole 66D are formed by the slit 74D. be able to.

  In the absorbent article of the present invention, as shown in FIGS. 1A and 1C, a second hole 68 is formed in at least one of the front and rear ends of the partition wall 62. By forming the second hole in the partition wall, and thus at least one end portion before and after the absorbent article, moisture sent via the exhaust path can be removed from one or both end portions before and after the absorbent article. It can be discharged.

  As shown in FIGS. 1A and 1C, the partition wall 62 preferably has a plurality of second holes 68 formed at the front and rear end portions thereof. By carrying out like this, it becomes easy to discharge moisture from the waist circumference of an absorptive article.

“End portion in the front-rear direction” means a portion of 30% length on each of the front end side and the rear end side excluding a portion having a length of 40% on the center side with respect to the entire length of the partition wall. The specific number of “plurality” is not limited. Although depending on the opening area of the second hole, if the opening area per hole is 0.5 to 10 mm ² , it is preferable to form 5 to 150, more preferably 10 to 100. By setting it to 5 or more, the exhaust function can be secured. On the other hand, when the number is 150 or less, it is possible to effectively prevent urine and body fluid from leaking from around the waist.

  Further, in the absorbent article of the present invention, as shown in FIG. 1C, the second hole 68 of the partition wall 62 is formed so as to open toward the top sheet 18 on the downward surface of at least one of the front and rear ends. It is preferred that By forming the second hole downward, even if urine or body fluid flows into the exhaust path, they can be discharged onto the top sheet and absorbed by the absorber. Accordingly, leakage from the front and rear end portions of the absorbent article can be effectively prevented. The front and rear end portions of the partition walls are end-stopped by an adhesive or the like in such a manner as to flatly crush the exhaust path, so that a downward surface is formed on a part of the partition walls.

  Furthermore, in the absorbent article of the present invention, it is preferable that at least the outward surface of the partition wall is formed of a water-repellent material or a liquid-impermeable material. By configuring at least the outward surface with a water-repellent material, etc., even if urine or body fluid flows into the exhaust path, urine or body fluid is blocked on the outward surface of the partition wall, preventing leakage outside the absorbent article Can do.

  Furthermore, in the absorbent article of the present invention, as shown in FIG. 1B, the partition wall 62 includes a plurality of sheet materials 70 and 76, and the plurality of sheet materials 70 and 76 are at least the tops of the partition walls 62. It is preferable that the stacked portions are formed by being stacked on each other, and the standing stretchable material 64 is fixed in an extended state between the layers of the stacked portions. By setting it as such a structure, a partition can be made to fully fit a wearer's skin and the operation | movement of a wearer's leg part can be utilized for a deformation | transformation of a partition (as a result, exhaust path) without loss. Therefore, the compression and restoration of the exhaust path can be performed actively, and the moisture exhaust performance can be improved.

  The partition wall 62 as shown in FIG. 1B can be manufactured by a method as shown in FIG. 1D, for example. First, as shown in FIG. 4A, the sheet material 70 and the sheet material 76 are bonded so as to partially overlap each other. At this time, the stretchable upright stretchable material 64 is sandwiched and fixed between the sheet materials 70 and 76. Moreover, in order to prevent peeling, the joining part 82 is formed in the laminated part of the sheet materials 70 and 76 by heat sealing. Thereafter, the first hole 66 is formed and shown in the portion consisting only of the sheet material 70 and is folded at the portion between the arrangement portion of the standing stretchable material 64 and the joint portion 82.

  Next, as shown in FIG. 5B, the adhesive 84 is applied to the edge of the sheet material 70, and the sheet material 70 is folded at the portion between the arrangement portion of the standing stretchable material 64 and the first hole 66. Further, as shown in FIG. 3C, the sheet material 70 is bonded to each other by the adhesive 84 to form the partition wall 62 and the exhaust path 60. By bonding this member to the absorbent article main body with an adhesive or the like, an absorbent article such as the absorbent article 1A shown in FIG. 1B can be obtained.

  At this time, it is preferable that the adhesive 84 and the adhesive for bonding the top sheet 18 and the sheet material 70 are applied narrowly as long as the partition wall 62 is not peeled off. By extending the adhesive portion between the sheet material 70 and the top sheet 18 and the adhesive portion between the sheet materials 70 formed by the adhesive 84, the stretchable material for standing up without the partition wall 62 being restrained by the adhesive portion. 64 sufficiently raises the exhaust effect of the partition wall 62.

  Further, in the absorbent article of the present invention, the partition wall is made of a single sheet material, the edge of the single sheet is folded back to form a folded portion, and the stretchable material for standing is inside the folded portion. Those fixed in an extended state are also preferable.

  That is, in the absorbent article 1A shown in FIG. 1B, the partition wall 62 is formed by the two sheet materials 70 and 76, but the partition wall 62 is formed by the single sheet material 70 without using the sheet material 76. You can also. Specifically, the sheet material 70 may be folded back at a portion corresponding to the bottom of the partition wall 62 to form a folded portion, and the standing stretchable material may be fixed in an expanded state inside the folded portion. By carrying out like this, the partition which show | plays the effect similar to 1 A of absorbent articles shown to FIG. 1B can be formed only with one sheet | seat material.

[3] Components of the absorbent article:
The absorbent article of the present invention is arranged such that the absorbent body 22 and at least a part thereof are made of a liquid-permeable material and cover the surface of the absorbent body 22 as in the absorbent article 1A shown in FIGS. 1A to 1C. The top sheet 18 is made of a liquid-impermeable material, and the back sheet 20 is disposed so as to cover the back surface of the absorber 22.

[3-1] Absorber:
The “absorber” is a member for absorbing and holding the wearer's urine and the like, and is made of an absorbent material.

  Examples of the “absorbent material” include fluff pulp, super absorbent polymer (hereinafter referred to as “SAP”), a hydrophilic sheet, and the like. “Fluff pulp” is made by pulverizing wood pulp or non-wood pulp into cotton, “SAP” is sodium polyacrylate, “Hydrophilic sheet” is tissue, absorbent paper, hydrophilized It is preferable to use a non-woven fabric that has been treated.

  As the absorber, it is preferable to use one or two or more absorbent materials formed into a single-layer or multi-layer mat. Especially, what combined 10-500 mass parts SAP with respect to 100 mass parts of fluff pulp is preferable. At this time, the SAP may be mixed in the fluff pulp mat or used in a layered manner between the fluff pulp mats.

  The absorber can be used after being molded into a desired shape such as a rectangular shape, an hourglass shape, a gourd shape, or a T-shape. The absorber is preferably encapsulated with a hydrophilic sheet for the purpose of preventing SAP from falling off and imparting shape stability. Usually, the absorber is sandwiched between a top sheet and a back sheet, and used in a state of being integrated with both sheets.

[3-2] Top sheet:
Since the top sheet needs to allow the wearer's urine or the like to pass therethrough, at least a part (all or a part) of the top sheet is made of a liquid-permeable material.

  Examples of the “liquid permeable material” include woven fabric, non-woven fabric, and porous film. Among these, it is preferable to use a nonwoven fabric made of a thermoplastic resin such as polypropylene, polyethylene, polyester, aliphatic polyamide, etc., which has been subjected to a hydrophilic treatment.

  As the “nonwoven fabric”, a nonwoven fabric produced by a manufacturing method such as air-through (card hot air) or card embossing can be suitably used. The “hydrophilic treatment” can be performed by applying, spraying, impregnating, etc. a surfactant.

  The top sheet is preferably “at least partly”, more specifically, when the top sheet is viewed in plan, at least the vicinity of the surface of the absorber is made of a liquid-permeable material.

  In addition, the sheet | seat located in the wearer's skin side of an absorbent article does not need to be comprised with all the top sheets. That is, the sheet in contact with the wearer's skin may be constituted by a plurality of sheets including the top sheet, and the top sheet and other sheets may be joined together in the surface direction of the sheet.

  For example, an absorbent article 1A shown in FIGS. 1A to 1C is a tape-type disposable diaper, and a top sheet 18 made of a liquid-permeable material is disposed at the center in the width direction of the diaper, and the side flap portion of the diaper is disposed on the side flap portion. This is an example in which a side sheet 19 made of a breathable water-repellent material showing resistance to liquid permeation is disposed. The ventilated water-repellent sheet may be a non-woven fabric produced by a method such as card embossing or spunbond, but a non-woven fabric sheet such as SMS or SMMS having a high waterproof property is more preferable.

[3-3] Backsheet:
A backsheet is a sheet | seat arrange | positioned so that the back surface (surface located in the side far from a wearer's skin at the time of mounting | wearing of a diaper) may be coat | covered. The back sheet is made of a liquid-impermeable material because it is necessary to prevent the wearer's urine from leaking outside the diaper.

  There is no restriction | limiting in particular about the arrangement position of a back seat | sheet. From the viewpoint of preventing leakage of urine absorbed by the absorber, it is preferable that a back sheet is disposed at least in a portion where the absorber exists.

  Examples of the liquid-impermeable material constituting the backsheet include a liquid-impermeable film made of a resin such as polyethylene. Among these, a microporous polyethylene film is preferably used. This microporous polyethylene film has a large number of fine pores of 0.1 to several μm, and is liquid impervious but has moisture permeability, so that the inside of the diaper can be prevented from being steamed There is.

  Note that, as shown in FIG. 1B, a cover sheet 24 may be bonded to the outer surface side of the back sheet 20. This cover sheet is used to reinforce the back sheet and improve the feel (tactile feeling) of the back sheet.

  Examples of the material constituting the cover sheet include woven fabric and non-woven fabric. Especially, it is preferable to use the dry nonwoven fabric and wet nonwoven fabric which consist of thermoplastic resins, such as polyethylene, a polypropylene, and polyester.

[3-4] Solid gathering:
The absorbent article of the present invention is preferably made of a water-repellent sheet and includes at least a pair of three-dimensional gathers arranged on both sides of the absorbent body. As already described, in the present invention, a three-dimensional gather function can be imparted to the partition walls by forming the partition walls with a water-repellent material or a liquid-impermeable material. However, it is preferable to provide a three-dimensional gather made of a water-repellent sheet separately from the partition walls. It is preferable that the three-dimensional gathers be arranged on the left and right sides of the absorbent body, more specifically on the outside of the pair of partition walls. By doing so, it is possible to prevent urine and body fluid that have entered the exhaust passage of the partition wall from leaking outside the absorbent article even if the partition wall is not formed of a water-repellent material or a liquid-impermeable material.

  The structure of a three-dimensional gather can employ | adopt the structure used for the conventional disposable diaper and other absorbent articles. For example, a material in which a stretchable material is sandwiched and fixed between layers of a water-repellent sheet, and a gather is formed by the contraction force of the stretchable material can be suitably used.

  The three-dimensional gather may be separately provided with a water-repellent sheet for three-dimensional gather as described above, or may be formed by a part of a sheet material (for example, a water-repellent side sheet) constituting a diaper. Good. The water-repellent sheet may be a nonwoven fabric produced by a production method such as card embossing or spunbonding, but a nonwoven fabric sheet such as SMS or SMMS having a high waterproof property is more preferable.

[3-5] Fastening tape:
As shown in FIG. 1A, the absorbent article of the present invention is for fixing the front body 2 and the back body 6 arranged so as to extend from the left and right side edges 6a, 6b of the back body 6. A fastening tape 11 may be provided. That is, the absorbent article of the present invention includes so-called tape-type disposable diapers.

  The fastening member of the fastening tape may be an adhesive fastener that is fixed by an adhesive, but a mechanical fastener (planar fastener) that is fixed by mechanical coupling is preferably used. In addition to high fastening force, the mechanical fastener has an advantage that the fastening force does not decrease even when the detachment is performed a plurality of times.

  For example, an absorbent article 1A shown in FIG. 1A is an example in which a mechanical fastener 46 is used as a fastening member. A hook material 46 a is attached near the tip of the fastening tape 11, while a front patch 13 made of a loop material 46 b is attached to the front body 2, and the fastening tape 11 is attached to the front patch 13. It is comprised so that it can stop.

  The number of fastening tapes is not particularly limited, and an appropriate number of fastening tapes may be attached according to the dimensions of the wearer's body shape (specifically, around the waist, around the legs, etc.). In general, a pair of disposable diapers for infants (one each on the left and right) is attached, and a pair of disposable diapers for adults (two on the left and two on the left) are attached.

[3-6] Various elastic materials:
When the absorbent article of the present invention is a disposable diaper, it is preferable to dispose a leg elastic member and a waist elastic material.

  The leg circumference elastic material is an elastic material arranged along the leg circumference opening. By arranging the leg-stretchable material, a gather (leg gather) rich in stretchability can be formed in the leg-surrounding opening. Therefore, it is difficult to form a gap around the leg, and urine leakage from the opening around the leg can be effectively prevented.

  The leg elastic material is made of thread rubber, flat rubber or the like. And it is preferable that the leg periphery elastic material is arrange | positioned in the part outside the standing line of a three-dimensional gather. With such a configuration, it is possible to improve the wearing feeling and wearing feeling of the crotch part while ensuring a sufficient leakage preventing effect of the three-dimensional gather.

  The waist elastic material is an elastic material arranged along the waist opening. By arranging the elastic material around the waist, a gather (waist gather) rich in elasticity can be formed in the waist opening. This waist gather makes it difficult for gaps to be formed around the waist, preventing urine leakage from around the waist, and improving the fit of the diaper to the wearer, thereby preventing the diaper from falling down.

  Absorbent article 1A shown in FIG. 1A is an example in which a belt-like waist elastic member 42 is disposed along the edge of the back body 6 of the diaper. The belt-like waist elastic member 42 is made of an elastic foam such as urethane foam. In the illustrated example, the waist elastic member 42 is disposed only on the back body (back side), but the waist elastic material may be disposed on the front body (abdominal side).

  For these stretchable materials, after considering the degree of shrinkage of gathers, etc., the constituent material, the elongation rate of the material, the stretched state at the time of fixing, etc. may be determined.

  As an elastic material, the elastic material which has been used with the conventional disposable diaper can be used conveniently. Specific examples include elastic rubber, elastic film, elastic foam (urethane foam, etc.), etc. in addition to natural rubber flat rubber and synthetic rubber (urethane rubber, etc.) elastic thread. it can.

  The stretchable material is preferably fixed in the stretched state in order to exert a sufficient stretch force. For example, when the elastic material is a flat rubber made of natural rubber or a thread rubber made of an elastic thread of synthetic rubber, it is preferably fixed in an extended state of 120 to 400%, and fixed in an extended state of 200 to 300%. More preferably. By fixing in the extended state in such a range, it is possible to apply a sufficient expansion / contraction force without applying an excessive tightening force to the wearer.

  The stretchable material as described above is fixed to other constituent members of the diaper by an adhesive or other means. The fixing method may be, for example, adhesion using a hot melt adhesive or other highly fluid adhesive, or may be welding by heat such as heat sealing or ultrasonic waves.

[3-7] Application target:
The absorbent article of the present invention can be applied to absorbent articles such as pants-type disposable diapers and urine pads in addition to the tape-type disposable diapers as described above.

  The “pants-type disposable diaper” is a pants-type configuration in which one waist opening and a pair of leg openings are formed by joining corresponding side edges of the front and back bodies together. It is a disposable diaper. In particular, a form in which the absorbent main body in which the absorbent body is encapsulated is fixed to the inside of a pants-type exterior sheet having one waist opening and a pair of leg openings (“2” is often used. Called "Piece type").

  The “urine pad” is also referred to as an inner pad or an auxiliary pad, and is an absorption pad exclusively for urine absorption. This urine pad is used in a state of being placed on the inner surface of the underwear or the surface of the top sheet of the disposable diaper. Like a disposable diaper, the urine pad includes an absorbent body, a top sheet disposed so as to cover the surface of the absorbent body, and a back sheet disposed so as to cover the back surface of the absorbent body. Generally, it is configured in a small pad shape that does not have a portion that encloses a person's waist.

  The absorbent article of the present invention will be described more specifically with reference to the drawings. However, the absorbent article of the present invention encompasses all absorbent articles having the invention-specific matters, and is not limited to the following examples.

[Example 1]
As the absorbent article of Example 1, a tape-type disposable diaper was produced. The specific structure was the structure of the absorbent article 1A shown in FIGS. 1A to 1C. This absorbent article 1A is of L size for babies, and the length in the front-rear direction is 485 mm, and the width of the back body 6 (the length between the side edges 6a and 6b) is 325 mm.

  1 A of absorbent articles were comprised with the sheet material 70 which makes a part of side sheet 19 made from SMS nonwoven fabric, and the sheet material 76 made from SMS nonwoven fabric different from this. The partition wall 62 was formed by the method shown in FIG. 1D. The sheet materials 70 and 76 were laminated to each other at portions corresponding to the top portion and the outward surface of the partition wall 62 to form a laminated portion.

  In the absorbent article 1 </ b> A, six stretchable materials as stretchable materials 64 for standing up the partition wall 62 are arranged in an expanded state between the layers of the laminated portion. The fixed length of the three-dimensional gather stretchable material 36 was 380 mm, and the stretch rate (length when stretched / length when not stretched × 100) was 300%.

On the inward surface (sheet material 76) of the partition wall 62, a pattern of 13 × 3 rows is formed in a 40% length portion on the central side excluding a 30% length portion on the front end side and the rear end side in the front-rear direction. Forty-nine first holes 66 were formed. Each of the first holes 66 has an elliptical shape with a major axis of 3 mm and a minor axis of 2 mm, and an opening area of 4.7 cm ² .

A second hole 68 was formed in a portion 30 to 80 mm from the front and rear ends of the partition wall 62. The second hole 68 was formed on the downward surface at the front and rear end portions so as to open toward the top sheet 18. Each of the second holes 68 has an elliptical shape with a major axis of 6 mm and a minor axis of 4 mm, and an opening area of 18.8 cm ² .

A pair of left and right partition walls 62 are arranged on both sides of the absorber 22 toward the front and rear ends of the absorber 22. Thereby, the exhaust path 60 partitioned from the outside by the sheet materials 70 and 76 was formed. The maximum cross-sectional area of the exhaust path 60 was 1.5 cm ² .

  The absorbent article of the present invention can be used for absorbent articles such as disposable diapers and urine pads for infants or adults such as the elderly and persons with disabilities who need care.

It is a figure showing one embodiment of an absorptive article of the present invention, and is a schematic top view showing a state where an absorptive article was developed and seen from the top sheet side. It is a schematic sectional drawing which shows the X-X 'cross section of the absorbent article shown to FIG. 1A. It is a schematic sectional drawing which shows the Y-Y 'cross section of the absorbent article shown to FIG. 1A. It is process drawing which shows the method of forming the partition of the absorbent article shown to FIG. 1A. It is a schematic plan view which shows embodiment of the 1st hole formed in the partition of the absorbent article of this invention. It is a schematic plan view which shows the state which the 1st hole shown to FIG. 2A opened .

Explanation of symbols

1A : Absorbent article, 2: Front body, 4: Crotch, 6: Back body, 6a, 6b: Side edges, 11: Fastening tape, 13: Front patch, 18: Top sheet, 19: Side sheet, 20 : Back sheet, 22: Absorber, 24: Cover sheet, 40: Elastic material around leg, 42: Elastic material around waist, 44: Elastic material around waist, 46: Mechanical fastener, 46a: Hook material, 46b: Loop material, 60: exhaust path, 62: partition wall, 64: stretchable material for standing, 66, 66A, 66B, 66C, 66D: first hole, 68: second hole, 70, 76 : sheet material, 72A, 72B, 72C , 72D: tongue, 74A, 74B, 74C, 74D: slit, 76: sheet material, 82: joint, 84: adhesive.

Claims (6)

An absorber, at least partly made of a liquid-permeable material, a top sheet arranged to cover the surface of the absorber, and a liquid-impermeable material so as to cover the back surface of the absorber A back sheet disposed; and a partition wall formed of a sheet material and forming a hollow tubular exhaust path partitioned from the outside,
The partition is left-right pair located on opposite sides of the absorbent body towards the front and rear ends of the absorbent body Rutotomoni, its front and rear ends are end stop so as to crush the exhaust path in a plane,
On the top side of the partition wall, a stretchable material for standing upright is fixed toward the front and rear ends of the absorber,
The partition wall is formed with a first hole on the inward surface of the central part in the front-rear direction, and a second hole is formed at at least one end part of the front-rear end part,
The first hole opens toward a space sandwiched between the pair of partition walls by shrinking the stretchable material for standing and standing up in a three-dimensional manner in the central part in the front-rear direction of the partition walls.
The second hole is an absorbent article that is located on a downward surface formed by the end stopper and opens toward the top sheet .   The absorbent article according to claim 1, wherein the partition wall has a plurality of the first holes formed at a central portion in the front-rear direction.   The absorbent article according to claim 1 or 2, wherein the partition wall has the first hole formed by a slit having a convex locus or a plurality of intersecting slits. The absorbent article according to any one of claims 1 to 3 , wherein at least an outward surface of the partition wall is formed of a water-repellent material or a liquid-impermeable material. The partition wall is composed of a plurality of sheet materials,
The plurality of sheets of sheet material, at least laminated portion is laminated to one another at the top of the partition wall is formed, between the layers of the laminated portion of claim 1-4, wherein the standing for elastics are secured in a stretched state The absorbent article as described in any one. The partition wall is made of a single sheet material,
Its edge of one sheet is folded portion is formed folded, said standing for elastics inside of the folded portion according to any one of claims 1 to 4 which is secured in a stretched state Absorbent article.

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