JP4364238B2 - Absorption pad - Google Patents

Description

  The present invention relates to an absorbent pad that is used in conjunction with a diaper having a front body and a back body and having an opening around a waist and an opening around a leg.

  Conventionally, when urine and feces are mixed, ammonia is generated as a cause of diaper rash when wearing diapers. This ammonia makes the environment alkaline, and the enzymes in the stool are strongly activated in an alkaline atmosphere. It has been considered that the weakened part of the skin becomes inflamed and causes diaper rash.

  For this reason, it can be said that the most reliable method for preventing diaper rash is to change the diaper every time urination or defecation and wash the dirty skin.

  On the other hand, in order to prevent the stool and urine from mixing or preventing the stool from adhering to the buttocks and suppressing the occurrence of diaper rash, for example, Patent Document 1, Patent Document 2, and Patent Document 3 Diapers that can be separated have been proposed.

  The diaper disclosed in Patent Literature 1 is provided with a long opening in the center of the top sheet in the longitudinal direction, and by attaching an elastic member along the peripheral edge of the opening, the top sheet has a so-called stiffness. This is so that the opening is not blocked. Moreover, the diaper disclosed in Patent Document 2 is provided with a recess extending under the opening provided in the surface sheet and a valve portion formed by extending the surface sheet from the periphery of the opening to the center. The stool separated by the opening is designed so as not to reverse. Furthermore, the diaper disclosed in Patent Document 3 overlaps two sets of flaps extending in the length direction and the width direction and forms an opening at the center thereof, thereby widening the area of the opening for storing the stool. It can be set.

JP-A-61-41304 Japanese Utility Model Publication No. 6-5614 Japanese Utility Model Publication No. 6-21623

  The method of preventing diaper rash by changing the diaper at each urination or defecation and washing the skin that is soiled with urine or stool results in the disposal of the entire diaper, regardless of the presence or absence of defecation. The amount of waste generated is unnecessarily increased, which is not preferable from the viewpoint of environmental protection.

  From the viewpoint that the amount of garbage is small, a combination of a traditional diaper cover that can be washed and used repeatedly and a disposable absorbent pad is also possible, but this can separate urine and stool It wasn't.

  On the other hand, in the case of the diapers disclosed in Patent Document 1 and Patent Document 2, when observing how the diapers are actually worn, the crotch region of the diaper is brought closer to the center by the thighs of the wearer's legs, and is closely attached to the skin. It turned out that it was in the state where it hung down downward without. That is, in these diapers, the crotch region of the top sheet or the top sheet (hereinafter collectively referred to as the top sheet) is not in close contact with the wearer's crotch, so the opening provided in the top sheet does not make sense. This causes a problem that the stool spreads on the top sheet. Even if the position of the opening of the top sheet matches the position of the wearer's anus, since the top sheet is not in close contact with the wearer's crotch, the opening is closed, and the opening is closed. It is expected that the stool cannot be guided between the top sheet and the back sheet. Moreover, in the case of the diaper disclosed in Patent Document 3, by taking a large area of the opening formed in the second topsheet, the position of the opening is almost surely matched with the position of the wearer's anus. However, since the opening area of the opening is too large, the stool guided between the second surface sheet and the first surface sheet through the opening is again from the opening to the second surface. The possibility of returning to the top sheet and soiling the wearer's buttocks was high.

  Moreover, even if such a special function is given to the diaper, it is often necessary to change the diaper only by urination, so the diaper is expensive due to an infrequently used function. The current situation is that it is not accepted by the public.

(Object of invention)
An object of the present invention is to provide an absorbent pad that is replaceably attached to a diaper and can reliably absorb urine.

The absorbent pad according to the present invention is an absorbent pad used for a diaper having a front body and a rear body, having an opening around a waist and an opening around a leg, and having an absorbent pad attachment / detachment opening in the front body. , a liquid-permeable sheet, a liquid impermeable sheet, and an absorbent material held between these liquid-permeable sheet and the liquid impermeable sheet, for inserting an absorbent pad from the absorbent pad access opening It is characterized by comprising an applicator .

  According to the present invention, when urination occurs, urine is absorbed by the absorbent material of the absorbent pad, and only the absorbent pad is exchanged from the absorbent pad attachment / detachment opening as needed without changing the diaper.

In the absorbent pad according to the present invention, the applicator may be removable or may be composed of a part of the absorbent material. Further, the absorbent material has pulp fibers and a polymer absorbent member, or the absorbent material has a mixture of microfibril cellulose and a polymer absorbent member and a hydrophilic sheet to which the mixture is applied. It may be.

  At least one of the liquid-permeable sheet, the liquid-impermeable sheet, and the hydrophilic sheet may be formed of a material having water decomposability.

  At least one of the liquid-permeable sheet and the liquid-impermeable sheet may have an extension means that can be extended as the absorbent material swells.

  It is also possible to further provide a liquid-impermeable pocket sheet that is joined to the peripheral edge of the liquid-permeable sheet to form a weir.

  The absorbent material may have a folded structure or a laminated structure.

According to the absorbent pad of the present invention, a liquid-permeable sheet, a liquid-impermeable sheet, an absorbent material held between the liquid-permeable sheet and the liquid-impermeable sheet, and an applicator are provided. Since it provided, a new absorption pad can be easily attached to a diaper while wearing a diaper, and urine can be reliably absorbed by the absorption pad. In addition, it is possible to replace only the absorbent pad from the absorbent pad attachment / detachment opening without replacing the diaper when the stool is not defecation, and it is possible to suppress the generation of the total amount of garbage by eliminating the unnecessary replacement of the diaper.

  When the absorbent material has pulp fibers and a polymer absorbent member, or when it has a mixture of microfibril cellulose and a polymer absorbent member and a hydrophilic sheet to which this mixture is applied, it absorbs urine. A good absorbent pad can be obtained.

  When at least one of the liquid-permeable sheet, the liquid-impermeable sheet and the hydrophilic sheet is formed of a water-decomposable material, at least a part of the diaper and the absorbent pad discarded after use is water. Since it is decomposed | disassembled, the process of a garbage becomes easy and the quantity can be reduced.

  When at least one of the liquid-permeable sheet and the liquid-impermeable sheet is provided with an extension means that can be extended along with the swelling of the absorbent material, the function of the absorbent material can be sufficiently exhibited, Even if there is urination, it can be absorbed reliably.

  When a liquid-impermeable pocket sheet that is joined to the peripheral edge of the liquid-permeable sheet to form a weir is provided, even if there is a large amount of urination temporarily, the absorbent member absorbs this Urine leakage can be prevented by the weir of the absorbent pad.

If A Puriketa is removable, by removing the applicator after you have mounted the absorbent pad to the diaper from the absorbent pad, there is no problem, such as impairing the wearing comfort of the diaper. In addition, when the applicator is composed of a part of the absorbent material, a part of the absorbent material can function as an applicator, so that it is not necessary to provide a separate applicator, and the cost for that is reduced. be able to.

  When the absorbent material has a folded structure, a large amount of absorbing function can be confined within a small volume, which is convenient when the absorbent pad is compact and can be carried and stored.

  When the absorbent material has a laminated structure, the absorption capacity of the absorbent pad can be easily adjusted by changing the number of laminated absorbent materials during production, and the production cost can be reduced.

  An embodiment in which the absorbent pad according to the present invention is applied, that is, an embodiment applied to a pants-type diaper will be described in detail with reference to FIGS. 1 to 20, but the present invention is not limited to such an embodiment, Further, they can be combined and applied to other techniques that should be included in the concept of the present invention described in the claims of this specification. For example, the present invention is applied to a development type, that is, a tape-type diaper in which both sides in the width direction of the back sheet are extended to the side to form side flaps and the side edges of the side flaps are overlapped and bonded to the front body. Of course, it is also possible to apply an absorbent pad. It can also be applied to washable cloth diapers, in which case only the absorbent pad is made disposable, and other parts such as backsheets and topsheets are generally used for underwear such as In addition to cotton, it can be composed of polyester, nylon, rayon, silk, or a blended material of these and cotton.

  The external appearance of the diaper in this embodiment is shown in FIG. 1, the inner shape is shown in FIG. 2 in an unfolded state, and the structure in which the central portion is cut from the front body to the back body is shown in FIG. That is, the diaper 10 in the present embodiment has a liquid-impermeable back sheet 13 that forms a pant-like shape as a whole and forms a waist opening 11 and a pair of leg openings 12, and the back sheet 13. The absorbent body 14 is sandwiched between the sheet 14 and the back sheet 13 in the region of the front body 10F of the diaper 10 that is disposed and extends from the front body 10F of the diaper 10 to the rear body 10R. As described above, the hydrophilic liquid-permeable cover sheet 15 bonded to the back sheet 13 and the front body 10F to the rear body 10R of the diaper 10 disposed on the cover sheet 15 and the back sheet 13 Extending and having a laminated structure in which both ends 16E in the longitudinal direction and both side edges 16W in the width direction are joined to the cover sheet 15 and the back sheet 13. And the stool separation port 17 formed in the crotch region of the diaper 10 at the center of the top sheet 16, and the longitudinal extension of the top sheet 16 so as to surround the stool separation port 17, respectively. The stretchable elastic members 18a, 18b, 18c, and 18d, which are joined in a state of four, and the side edges 16W in the width direction of the top sheet 16, that is, along the leg-hole openings 12, A pair of elastic members 19a and 19b that can be stretched and joined to the top sheet 16 and a substantially V-shaped or U-shaped shape formed at the center in the width direction of the front body 10F region of the diaper 10 of the top sheet 16. A cutout portion 20 formed, an absorbent pad 21 disposed so as to face the cutout portion 20 between the absorbent body 14 and the top sheet 16, and a front body 10F formed on the front body 10F of the diaper 10. A slit-like absorbent pad attachment / detachment opening 22 for extending / retracting the absorbent pad 21 and extending along the absorption pad attachment / detachment opening 22 in the vicinity of the absorption pad attachment / detachment opening 22. A plurality of elastic members 23 that can be stretched and held between the back sheet 13 and the top sheet 16 or the cover sheet 15, and the back sheet 13 and the top sheet in a stretched state along the waist opening 11 of the diaper 10. 16 or a plurality of elastic members 24 around the waist that can be stretched and held between the cover sheet 15 and the cover sheet 15.

  The back sheet 13 of this embodiment functioning as a so-called diaper cover may be a liquid-impermeable sheet alone or may be laminated with a plurality of nonwoven fabrics. Examples of the liquid-impermeable sheet include a liquid-impermeable polyethylene sheet, preferably a polyethylene sheet having micropores for ventilation, and a sheet having a moisture permeability such as a sheet stretched by adding a filler to a thermoplastic resin. By using a permeable sheet and imparting moisture permeability, it is possible to suppress pealing, so that the diaper can be made more comfortable. A non-woven fabric may be attached to the outside of the back sheet 13 in order to improve the touch. As this nonwoven fabric, synthetic fibers made from thermoplastic resins such as polyethylene, polypropylene and polyester can be used. This nonwoven fabric may be liquid impermeable or liquid permeable. Moreover, you may use a textile fabric as a liquid-impermeable sheet | seat mentioned above. As the material of the woven fabric, polyester, nylon, rayon, silk, and a blended material of these with cotton can be used in addition to general materials used in underwear, such as cotton. In order to make this woven fabric wash-resistant, Gore-Tex (trade name: manufactured by WL Gore & Associates), Texlon (trade name: manufactured by DuPont), Microtex ( It is preferable to use a material having both waterproofness and air permeability such as a product name (manufactured by Nitto Denko Corporation).

  The top sheet 16 in the present embodiment is composed of an upper sheet 16U and a liner sheet 16L that are superposed on each other, and the above-described two sets of elastic members 18a, 18b, 18c, 18d and 19a, 19b are connected to the upper sheet 16U. It is sandwiched between the liner sheet 16L. One set of elastic members 18a, 18b extends from one end in the width direction of the front body 10F region to the crotch region so as to sandwich the stool separation port 17, and extends to the other end in the width direction of the rear body 10R region, The other pair of elastic members 18c, 18d extends from the other end in the width direction of the front body 10F region through the crotch region so as to sandwich the stool separation port 17, and extends to one end in the width direction of the rear body 10R region. Yes. That is, the two sets of elastic members 18 a, 18 b, 18 c, and 18 d are arranged so as to lean against the top sheet 16 so as to cross each other with the stool separation port 17 interposed therebetween. The periphery is surrounded by these two sets of elastic members 18a, 18b, 18c, and 18d.

  The top sheet 16 is suspended from the back sheet 13 by the elastic members 18a, 18b, 18c, and 18d. For this reason, the top sheet 16 is in close contact with the skin of the wearer, and a gap 25 is formed between the back sheet 13 and the stool. Instead of the elastic members 18a, 18b, 18c, and 18d described above, the top sheet 16 may be formed of an elastic sheet so that the top sheet 16 itself can extend.

  As the top sheet 16, a non-woven fabric such as synthetic fiber, a mesh sheet or a film using polyethylene, polypropylene, polyester and other thermoplastic resins as raw materials is used, but a woven fabric can also be used. As this woven fabric, polyester, nylon, rayon, silk, and a blended material of these with cotton can be used in addition to general materials used in underwear as described above, such as cotton. When the woven fabric is used as the top sheet 16, it is preferable to use a knit material such as a knitted fabric or a stretchable sheet subjected to needle punching in order to bring the fabric into close contact with the wearer's skin. In addition, it is preferable to use a material having both waterproofness and air permeability, such as GORE-TEX and MICRO-Tex obtained by applying teflon processing to the woven fabric. When a woven fabric is used for the top sheet 16, an elastic body may be disposed around the stool separation port 17, or the periphery of the stool separation port 17 may be bordered with a bias so that it is not easily deformed.

  As the elastic members 18a, 18b, 18c, 18d, 23, and 24, a flat rubber formed by forming natural rubber into a ribbon shape, a urethane thread, a thread rubber, a stretchable net, and a stretchable film can be used as they are. Any width or diameter can be incorporated by using a joining means such as hot melt, heat sealing or ultrasonic fusion at an arbitrary expansion ratio.

  Another arrangement example of the absorbent pad attachment / detachment opening 22 provided in the back sheet 13 is shown in FIG. That is, the absorbent pad attachment / detachment opening 22 in this embodiment is formed obliquely from the center waist circumference opening 11 side of the diaper front body 21F to one side of the leg circumference opening 12. An elastic member 23 is disposed along the extending direction of the absorbent pad attaching / detaching port 22 on the crotch side of the absorbent pad attaching / detaching port 22 to facilitate opening and closing thereof.

  Thus, when the absorption pad attachment / detachment opening 22 is formed obliquely, workability when the caregiver turns the hand from the back of the wearer and puts the absorption pad 21 in and out becomes easy.

  As the absorbent pad attachment / detachment opening 22, it is also possible to form the absorption pad attachment / detachment opening 22 by forming a perforation in advance and breaking it. The external appearance of such another embodiment is shown in FIG. 5, but like the embodiment shown in FIG. 4, elements having the same functions as those of the previous embodiment are designated by the same reference numerals, and redundant explanations are given. Shall be omitted. That is, a perforation 22a is formed in the front body 21F of the diaper 10, and a finger hooking hole 22b for facilitating breakage of the perforation 22a is provided at the center of the perforation 22a. Further, a pair of end holes 22c for defining the width of the absorbent pad attaching / detaching port 22 formed when the perforation 22a is broken is formed on both ends of the perforation 22a. The hole 22c is a slit-like opening extending in a direction orthogonal to the extending direction of the perforation 22a, but may be a round hole or the like.

  In this embodiment, unless the perforation 22a is broken, the absorbent pad attachment / detachment opening 22 is not formed. That is, the absorption pad attachment / detachment opening 22 does not exist. Therefore, when the diaper 10 is worn, the absorption pad attachment / detachment opening 22 is provided. Does not cause a problem that makes it difficult to open the crotch region upward. Therefore, after wearing the diaper 10, by inserting a finger into the finger hooking hole 22b and pulling the back sheet 13, the perforation 22a is broken to form the absorbent pad attachment / detachment opening 22 where both ends reach the end hole 22c.

  In view of the above, it is also possible to open and close the absorbent pad attachment / detachment opening 22 by opening / closing means using a hook-and-loop fastener, an adhesive tape, or the like. For example, FIG. 6 shows the appearance of another embodiment of a diaper. As shown, the pair of surface fasteners 22d and 22e are joined to the back sheet 13 with the absorbent pad attachment / detachment opening 22 of the front body 21F of the diaper 10 interposed therebetween, and one surface fastener 22d is peeled off from the other surface fastener 22e. The absorbent pad attachment / detachment port 22 can be opened. On the contrary, the absorbent pad attaching / detaching port 22 can be closed by overlapping one surface fastener 22d with the other surface fastener 22e and meshing with each other. As the opening / closing means, a snap, a button, a zipper, or the like can be employed in addition to the above-described hook and loop fasteners 22d and 22e and the adhesive tape.

  FIG. 7 shows a cross-sectional structure of another embodiment of the diaper. Like the embodiment shown in FIG. 6, the same reference numerals are given to elements having the same functions as those of the previous embodiment, and the description is repeated. Shall be omitted. That is, as a back sheet 13 of the diaper 10, using a woven fabric such as cotton having a moisture-proof finish on the inner surface, or a waterproof moisture-permeable material such as Gore-Tex, the absorber 14 as in the embodiment shown in FIG. 3 is not provided, Urine may be absorbed only by the absorbent pad 21. In the present embodiment, a net-like filament woven fabric is used as the top sheet 16 so that the top sheet 16 does not hinder urine permeation. Both ends in the longitudinal direction of the top sheet 16 are fixed to the opening 11 around the waist by a back sheet 13. An elastic member 24 around the waist is disposed in the waist opening 11, an absorption pad attachment / detachment opening 22 is provided in the front body 10 </ b> F of the diaper 10, and the elastic member 23 is disposed along the absorption pad attachment / detachment opening 22. The point is the same as that of the embodiment shown in FIG.

  When stool is excreted in the diaper 10 of the present embodiment, the stool is held on the back sheet 13 through the stool separation port 17 of the top sheet 16, and therefore, after removing the diaper 10 from the wearer and throwing away only the stool The diaper 10 can be reused by washing.

  The external appearance of the absorption pad 21 for absorbing urine is shown in FIG. 8, its developed shape is shown in FIG. 9, its XX arrow sectional structure is shown in FIG. 10, and its planar shape is shown in FIG. That is, the absorbent pad 21 in this embodiment includes a liquid-impermeable sheet 26 facing the cover sheet 15 side, a liquid-permeable sheet 27 facing the top sheet 16 side, and the liquid-impermeable sheet 26 and the liquid-permeable sheet. And a receiving portion 29 that protrudes downward to temporarily receive urine when a large amount of urine is discharged. In the present embodiment, the receiving portion 29 is joined in a state in which a joint portion 27C (shown by cross hatching in FIG. 9) on one side of the liquid-permeable sheet 27 that is rectangular in the unfolded state is folded in two and overlapped. Is formed.

  The absorbent body 28 in the present embodiment has a structure in which a mixed mat 28M formed by mixing a polymer absorbent material with a main material of fluff pulp made of wood pulp or non-wood pulp in a cotton form is wrapped with tissue 28T. The tissue 28T prevents the polymer absorbent material from jumping out of the mixing mat 28M. Instead of the above-described mixing mat 28M, a polymer absorbent material alone, or a mixture or laminate such as a heat-sealing fiber can be employed. Further, a coating liquid in which a polymer absorbing material and microfibril cellulose are dispersed in a solution of propylene glycol or methanol and water is directly applied to the liquid-impermeable sheet 26 or the liquid-permeable sheet 27, or polyethylene, polypropylene, The absorbent body 28 may be formed by coating a nonwoven fabric made of synthetic fiber made of polyester or other thermoplastic resin, and the absorbent body 28 may be applied to the liquid-impermeable sheet 26 or the liquid-permeable sheet 27. .

  In this embodiment, in order to allow the volume expansion of the mixing mat 28M accompanying the absorption of urine, the drape portion 30 is formed on the liquid-impermeable sheet 26 to function as the extending means of the present invention. The permeable sheet 26 may be formed to be stretchable by a spunlace method.

  As the liquid-impermeable sheet 26 used for the absorbent pad 21, a film or a nonwoven fabric made of a general-purpose thermoplastic resin such as polyethylene or polypropylene is used. However, since the outside is double protected, the strength is considered. There is little need to do this, and a thin and inexpensive one is sufficient.

  As the liquid permeable sheet 27 used for the absorbent pad 21, a liquid permeable nonwoven fabric made of synthetic fibers made of polyethylene, polypropylene, polyester, or other thermoplastic resin as a raw material is used. In particular, when a wet nonwoven fabric composed of pulp or rayon and the synthetic fiber is employed, it can be poured into sewage as it is because it has water decomposability.

  The microfibril cellulose described above is an ultrafine fiber having an average fiber length of 0.1 mm or less obtained by opening wood pulp under a high share. In addition, as the above-described high molecular weight absorbing material, starch-based, cellulose-based and synthetic polymer-based materials can be employed. Specifically, starch-acrylic acid (salt) graft copolymer, saponified starch-ethyl acrylate graft copolymer, saponified starch-acrylonitrile graft copolymer, saponified starch-acrylamide graft copolymer And a cross-linked product of acrylic acid (salt) polymer, polyethylene oxide cross-linked with acrylic acid, sodium carboxymethyl cellulose, and polyvinyl alcohol-maleic anhydride reaction product. In particular, a sodium polyacrylate-based one is suitable and can absorb liquid such as urine 20 times or more of its own weight.

Further, after pulled out the used absorbent pad 21 from the absorbent pad mounting port 22 of the diaper during wear, when inserting a new absorbent pad 21, the applicator 31 is used to facilitate the mounting operation, which Accordingly, the insertion portion 32 into which the tip of the applicator 31 is inserted is joined to the receiving portion 29 of the liquid-impermeable sheet 26.

  The applicator 31 is intended to assist the insertion of the absorbent pad 21 through the absorbent pad attachment / detachment opening 22 while wearing the diaper 10. In the present embodiment, the applicator 31 is separate from the absorbent pad 21, so It does not matter whether or not it is absorbable. On the other hand, since the absorption pad 21 itself needs to absorb urine intensively, it is required to have diffusibility. From such a viewpoint, it is also possible to use an applicator 31 having an absorption performance that helps diffusion, and in this case, the applicator 31 can be provided integrally with the absorption pad 21. If the applicator 31 does not have such an absorption function, the applicator 31 can be detached from the absorption pad 21 as in this embodiment.

  The applicator 31 can be provided with a urine indicator function. For example, the tip of the applicator 31 is always visible from the outside, and when the urine is absorbed up to the tip of the applicator 31, a mark is formed on the applicator 31 to change the color of this portion. It can be used as an indicator.

  Although there is no need to dispose the absorbent body 14 on the backsheet 13, the backsheet 13 as in this embodiment is used as a countermeasure when water contained in the stool is removed or urine leaks from the absorbent pad 21. It is preferable to arrange the absorber 14 on top. The absorber 14 can be made of the same material as the absorber 28 of the absorbent pad 21, but it is not necessary to absorb a large amount of moisture and can be formed thinner than that. As shown in FIG. 12 showing the mounting state of the absorbent pad 21 using the applicator 31 shown in FIG. 11, the thickness of the absorber 14 from the crotch region to the back body 10R is set to be thicker than the front body 10F side, It is also effective to suppress the movement of loose stool or the like by bonding the net layer 33 thereon.

  As described above, since at least four elastic members 18a, 18b, 18c, and 18d joined to the top sheet 16 extend from the front body 10F to the rear body 10R of the diaper 10, the top sheet 16 is the back sheet 13. The elastic members 18a, 18b, 18c, and 18d are stretched when worn, and the top sheet 16 comes into close contact with the wearer's skin while the back sheet 13 and the top sheet 16 are in contact with each other. A space 25 is formed between the stool and the stool, through which the stool is guided. For this reason, it is necessary to prevent the stool separation port 17 of the top sheet 16 from being blocked by the elastic force of the elastic members 18a, 18b, 18c, and 18d.

  In this embodiment, the top sheet 16 in a state of being contracted by the elastic members 18a, 18b, 18c, and 18d when worn is pulled in an unfolded state as shown in FIG. The four elastic members 18a, 18b, 18c, and 18d that are surrounded and pulled in a straight line are deformed into a rhombus. This deformation works almost evenly around the stool separation port 17, and the stool separation port 17 is formed in the rhombus portion. Retained without blocking. In addition, since the elastic members 18a, 18b, 18c, and 18d are disposed on the outer edge of the top sheet 16 in the width direction, the top sheet 16 can contact the wearer's skin and prevent the displacement thereof. Even when the stool is not guided from the stool separation port 17 of the top sheet 16 onto the back sheet 13 and remains between the top sheet 16 and the buttocks of the wearer, leakage from the outer edge in the width direction of the top sheet 16 is prevented. Can function as a gather. Further, the wearer's urine is quickly absorbed by the absorbent pad 21 without the top sheet 16 being interposed by the notch 20 of the top sheet 16.

  As described above, since the replaceable absorbent pad 21 mainly absorbs urine, the absorbent body 28 is folded to have a structure such as a bellows or a laminated structure so that the amount of liquid absorbed per unit area or unit volume can be increased. It is preferable to be able to do more. Further, it is desirable to combine a temporary reservoir layer such as a receiving portion 29 that temporarily holds urine until it is absorbed by the absorber 28, a diffusion sheet that quickly diffuses urine, and the like. As a material constituting the temporary storage layer, a bulky nonwoven fabric made of synthetic fibers made from thermoplastic resins such as polyethylene, polypropylene and polyester is suitable. This temporary storage layer serves to retain the urine on the absorbent pad 21 until urine diffuses into the absorber 28 or is absorbed by the polymer absorbent material. As a result, urine can be quickly absorbed by the absorber 28 from the liquid-permeable sheet. Further, as the diffusion sheet, a pulp sheet made of wood pulp or non-wood pulp as a raw material and manufactured by wet papermaking or a dry production method is preferable. This diffusion sheet functions to diffuse urine absorbed in the surface direction by utilizing the capillary force of pulp fibers.

  In the above-described embodiment, the drape portion 30 is formed in the liquid-impermeable sheet 26 to allow the volume expansion of the mixing mat 28M accompanying the absorption of urine, but the extending means is formed in the liquid-permeable sheet 27. It is also possible. FIG. 13 shows a cross-sectional structure of another embodiment of the absorbent pad 21 according to the present invention. Elements having the same functions as those of the previous embodiment are designated by the same reference numerals, and redundant description is omitted. Shall. That is, in the vicinity of the joint portion of the liquid-permeable sheet 27 with respect to the liquid-impermeable sheet 26, a pair of folding portions 27D that can be widened are formed as the extending means of the present invention. As the volume expands, the folded portion 27D expands.

  FIG. 14 shows the planar shape of another embodiment of the absorbent pad 21 according to the present invention, and FIG. 15 shows the XV-XV arrow cross-sectional structure of the absorbent pad 21 according to the present invention. The same reference numerals are given. That is, the absorbent pad 21 in the present embodiment joins the liquid-impermeable pocket sheet 34 to the side edge portion and the lower edge portion of the liquid-permeable sheet 27, and the weir 35 rising from the surface of the liquid-permeable sheet 27 It is formed in a letter shape. By forming such a weir 35, urine overflows from the absorption pad 21 to the back sheet 13 side and mixes with feces until urine passes through the liquid-permeable sheet 27 and is absorbed by the absorber 28. You can make it not fit.

  The appearance of still another embodiment of the absorbent pad 21 according to the present invention is shown in FIG. 16, its developed shape is shown in FIG. 17, and its XVIII-XVIII arrow sectional structure is shown in FIG. The same reference numerals are used for functional elements, and duplicate descriptions are omitted. That is, the absorbent pad 21 in the present embodiment has an unfolded structure as shown in FIG. 17, has a front body part 21F, a crotch part 21C, and a pair of left and right side piece parts 21S. By joining the region, that is, the terminal portion of the side piece portion 21S to the crotch portion 21C, a three-dimensional structure that protrudes downward can be formed, and the side piece portion 21S can function as the weir described above. In addition, a temporary storage layer 36 is formed on the mixing mat 28M, and it is possible to prevent urine from leaking from the absorption pad 12 in combination with the presence of the side piece 21S described above during urination.

  In addition to the above-described embodiment, for example, a structure as shown in FIG. 19 or FIG. 20 can be appropriately adopted as the configuration of the absorbent body 28 constituting the main part of the absorbent pad 21. That is, the absorbent body 28 shown in FIG. 19 has a streak of a diffusion sheet 37 between the liquid-impermeable sheet 26 and the liquid-permeable sheet 27, and a microfibril and a polymer absorbent material on the hydrophilic sheet 38H. The SAP sheet 38 on which the coating layer 38P formed by the mixed coating is formed and the temporary storage layer 36 are sequentially laminated. In this embodiment, two SAP sheets 38 are formed. In the structure shown in FIG. 20, a plurality of the above-described SAP sheets 38 are assembled in a bellows-like manner between the liquid-impermeable sheet 26 and the liquid-permeable sheet 27, and a temporary storage layer is provided thereon. 36, and the SAP sheet 38 and the temporary storage layer 36 constitute the absorber 28.

It is a perspective view showing the appearance of one embodiment of the underpants type diaper which can apply the absorption pad by the present invention. It is an expanded view of the diaper shown in FIG. 1, and shows the inner side of a diaper. It is a longitudinal cross-sectional view from the front body of the diaper shown in FIG. 1 through the crotch region to the back body. It is a perspective view showing the external appearance of other embodiment of the diaper which can apply the absorption pad by this invention. It is a perspective view showing the external appearance of another embodiment of the diaper which can apply the absorption pad by this invention. It is a perspective view showing the external appearance of other embodiment of the diaper which can apply the absorption pad by this invention. It is a longitudinal cross-sectional view from the front body to the back body through the crotch region in yet another embodiment of the diaper to which the absorbent pad according to the present invention can be applied. It is a perspective view showing the external appearance of one Embodiment of the absorption pad by this invention integrated in the diaper shown in FIG. It is an expanded view of the absorption pad shown in FIG. It is XX arrow sectional drawing in FIG. It is a front view of the absorption pad shown in FIG. 8 equipped with an applicator. In other embodiment of the diaper which can apply the absorption pad by this invention, it is a longitudinal cross-sectional view showing the mounting state of an absorption pad using the applicator shown in FIG. It is sectional drawing showing other embodiment of the absorption pad by this invention. It is a front view of another embodiment of the absorption pad by this invention. It is XV-XV arrow sectional drawing in FIG. It is a perspective view showing the external appearance of other embodiment of the absorption pad by this invention. It is an expanded view of the absorption pad shown in FIG. It is XVIII-XVIII arrow directional cross-sectional view in FIG. 17 in the absorption pad shown in FIG. It is sectional drawing in other embodiment of the absorption pad by this invention. It is sectional drawing in another embodiment of the absorption pad by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Diaper 10F Front body 10R Back body 11 Waist opening part 12 Leg opening part 13 Back sheet 14 Absorber 15 Cover sheet 16 Top sheet 16E Both ends of the longitudinal direction of the top sheet 16W Both side edges 16U of the top sheet in the width direction 16L Liner Sheet 17 Stool Separation Port 18a-18d, 19a, 19b Elastic Member 20 Notch 21 Absorption Pad 21F Front Body 21C Crotch 21S Side Piece 22 Absorption Pad Detachment Port 22a Perforation 22b Finger Hook 22c End Hole 22d, 22e Surface fastener 23 Elastic member 24 Elastic member around waist 25 Air gap 26 Liquid impermeable sheet 27 Liquid permeable sheet 27C Joint portion 27D Folded portion 28 Absorber 28M Mixing mat 28T Tissue 29 Receiving portion 30 Drape portion 3 Applicator 32 spigot 33 net layer 34 a pocket sheet 35 weir 36 one o'clock reservoir layer 37 diffusing sheet 38H hydrophilic sheet 38P coating layer 38 SAP sheet

Claims (9)

An absorbent pad used for a diaper having a front body and a back body, a waist opening and a leg opening are formed, and an absorption pad attaching / detaching opening is provided in the front body,
A liquid permeable sheet;
A liquid-impermeable sheet;
An absorbent material held between the liquid-permeable sheet and the liquid-impermeable sheet ;
An absorbent pad comprising an applicator for inserting the absorbent pad from the absorbent pad attaching / detaching port . The absorbent pad according to claim 1 , wherein the applicator is removable. The absorbent pad according to claim 1 , wherein the applicator is constituted by a part of the absorbent material. The absorbent pad according to any one of claims 1 to 3, wherein the absorbent material includes pulp fibers and a polymer absorbent member. The said absorptive material has a mixture of a microfibril cellulose and a polymeric absorption member, and the hydrophilic sheet | seat with which this mixture is coated, The absorption in any one of Claims 1-3 characterized by the above-mentioned. pad. The liquid permeable sheet, according to any one of claims 1 to 5, wherein the liquid at least one of the impermeable sheet and the hydrophilic sheet is characterized in that it is formed of a material having a water-decomposable Absorption pad. The at least one of the said liquid-permeable sheet and the said liquid-impermeable sheet | seat has the expansion | extension means which becomes extensible as the said absorbent material swells, The any one of Claim 1-6 characterized by the above-mentioned. Absorption pad. The absorbent pad according to any one of claims 1 to 7 , further comprising a liquid-impermeable pocket sheet that is joined to a peripheral portion of the liquid-permeable sheet to form a weir. The absorbent pad according to any one of claims 1 to 8 , wherein the absorbent material has a folded structure or a laminated structure.

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