JPH08209403A - Disposable underpants - Google Patents

Abstract

PURPOSE: To prepare disposable underpants having a constitution not leaking urine and soft excreta out of underpants even in urination of a wearer in a lying state sideways. CONSTITUTION: In disposable underpants comprising an inner absorbing member having an absorbing material laid between a liquid permeable top sheet and a liquid impermeable back sheet and an outer sheet which is arranged at the outside of the inner absorbing member and is formed into a shape of underpants, both right and left side parts in the width direction of the back sheet are folded back to the top of the absorbing material and the folded back part is bonded to the under surface or the top of both the sides in the width direction of the top sheet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to disposable pants for children or adults which can be worn by the wearer in a standing posture, and more specifically, disposable disposable pants capable of reducing side leakage such as urine or loose stool. It's about pants.

[0002]

2. Description of the Related Art There are various structures of disposable pants, but a typical structure of the commercially available pants is shown in FIG. 4 (transverse cross sectional explanatory view). The disposable pants P shown in FIG. 4 is composed of an outer sheet 10 having a laminated structure and an inner absorbent member 9 that absorbs and holds urine, loose feces and the like inside thereof. The outer sheet 10 is a sheet 11 of non-woven fabric,
An elastic body for stacking two sheets 12 and elastically adjusting the legs and the body portion therebetween (only the leg elastic body 4c is shown in the drawing, but the waist elastic body 4a and the body portion 4a are shown. The elastic body 4b may be interposed, and the material is a thread-shaped or band-shaped synthetic rubber or natural rubber) attached in an extended state.

The inner absorbent member 9 is a liquid-permeable top sheet 3
It is configured by loading the absorbent body 1 in which crushed pulp, super absorbent resin, heat-fusible fiber, etc. are mixed between the (non-woven fabric) and the liquid-impermeable back sheet 2 (made of synthetic resin film). As shown in the drawing, both side edges of the top sheet 3 and the back sheet 2 are joined together by further superimposing the root portions of the rising gathers 5 and 5 that have been subjected to the water repellent treatment. An elastic body 51 in a stretched state is additionally provided in the folded bag on one side edge of the rising gather 5, and the rising root portion of the other end side edge is bonded to the upper surface of the top sheet 3. The backsheet 2 of the inner absorbent member 9 is overlaid and adhered to the inner side of the outer sheet 10 (on the side of the sheet 12), and these are integrated to form disposable pants.

However, the side edges of the top sheet 3 and the back sheet 2 are joined together by a hot melt adhesive (as in the example shown in the figure, a riser gather 5 is placed on the top or both sheets 2 and 3 are adhered together. There is, but
If a large amount of adhesive is applied to this joint portion, it solidifies and becomes stiff, so that the touch becomes poor. Therefore,
It is necessary to reduce the amount of adhesive applied as much as possible, but this time, on the contrary,
Uneven application of the adhesive and unapplied parts occur, and the two members are not completely sealed. This tendency increases especially in the case of high-speed production.

When such a defect occurs in the step of applying the hot melt adhesive or the like, side leakage of urine is caused from the unbonded portion of the back sheet 2 and the top sheet 3 as shown by an arrow F. This leakage of urine, loose stools, etc. is likely to occur when the wearer is lying sideways, and the clothes and bedding are soiled by the leakage of urine, which is an important problem.

[0006]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide disposable pants that are produced at high speed and have a structure in which urine or the like does not leak sideways even if uneven application of adhesive occurs. To provide.

[0007]

Means for Solving the Problems The present invention, which has achieved the above object, provides an internal absorbent member having an absorbent body interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet, and the internal absorbent member. In the disposable pants consisting of an outer sheet which is arranged on the outer side of the back sheet and is formed in a pant-type, both left and right side portions in the width direction of the back sheet are folded back to the upper part of the absorber, and the folded back portions are bonded to the lower surfaces of both side portions in the top sheet width direction. Alternatively, the gist is that the folded-back portion is adhered to the upper surfaces of both side portions in the width direction of the top sheet.

When the folded-back portion is adhered to the lower surface of the topsheet, the root portion of the rising gather, in which an elastic body in a stretched state is attached to one side edge, is located above the backsheet folded-back portion. It is possible to adopt a configuration in which the upper surface is adhered, and when the folded portion is adhered to the top sheet upper surface, it is possible to adopt a configuration in which the root portion of the rising gather is adhered to the folded portion upper surface of the back sheet, Further, it is a more preferable embodiment for preventing lateral leakage that a side edge portion extending outward from the root portion of the rising gather is adhered to the outer sheet. Further, both the longitudinal ends of the rising gather are adhered to the top sheet top surface, and the longitudinal ends of the back sheet are also folded back to cover the front and rear side surfaces of the absorbent body. It is effective in preventing urine leakage from the edges. Further, the outer sheet has a laminated structure of two-layer sheets, and the waist elastic body, the leg elastic body, and the waist elastic body parallel to the waist elastic body are freely stretchable between the two-layer sheets. When attached to, the disposable pants can be brought into close contact with the wearer's body.

[0009]

The greatest feature of the present invention is that the left and right side portions of the backsheet are folded back to the upper surface of the absorber, and the folded portions are adhered to the upper surface or the lower surface of the topsheet. It is in the place of coating so as to form a groove of a shape. By adopting this configuration, part of urine or loose stool that has passed through the top sheet is diffused to the front side and the back side of the pants through the groove formed by the folded-back portion, and is quickly and efficiently absorbed by the absorber. To be done.

The folded-back portion of the backsheet is formed by the folded-back portion of the backsheet because it is adhered to either the upper surface or the lower surface of the topsheet and is shaped so as to completely envelop the entire absorber. The shape of the groove is not crushed, and even if uneven application of adhesive occurs during production, urine and loose stools will not leak sideways to the outside of the pants, and it will be completely captured and absorbed by the absorber. . Therefore, side leakage of urine does not occur even when the wearer is lying sideways.

In the case where the back sheet has a side portion bent upward in an L-shape, it is difficult to adhere the back sheet to the top sheet in terms of manufacturing, and the bent portion is subjected to an external force caused by a change in posture of the wearer. The effect of preventing leakage of urine cannot be said to be perfect, because the material is easily deformed due to the shape restoring property of the material.

On the other hand, urine flowing on the upper surface of the top sheet is prevented from flowing in the lateral direction by the water-repellent rising gathers adhered along the longitudinal direction on the right and left side portions of the top sheet, and gradually passes through the top sheet. Since it is absorbed by the absorber, side leakage is more reliably prevented. Note that the structure in which the rising gathers are directly adhered to the folded-back portion of the back sheet can prevent lateral movement of urine or the like passing between the fibers of the top sheet. It is preferable that the longitudinal ends of the rising gathers are bonded to the top sheet to form a pocket structure, and both longitudinal end portions of the back sheet are folded back to the upper surface of the absorbent body, and urine leaks from the front and rear portions of the absorbent body. It is effective for prevention.

Further, the outer sheet has a two-layer structure, and a waist elastic body, a leg elastic body, or a waist elastic body parallel to the waist elastic body is attached in a stretched state to form a pants type The outer sheet can be elastically and closely attached to the body of the wearer. As a result, the disposable pants can be worn and removed smoothly, and even when they are worn, they can be prevented from shifting and side leakage of urine or the like can be prevented more reliably.

[0014]

Embodiments of the present invention will be described with reference to FIGS. FIG. 1 is an explanatory view of disassembling the disposable pants P, FIG. 2 is a plan view of the absorbent body 1, and FIG. 3 is a cross-sectional explanatory view of the disposable pants of FIG.

The disposable pants P comprises an outer sheet 10 and an inner absorbent member 9, and the outer sheet 10 has a laminated structure of two non-woven sheets 11 and 12. These sheets 1
A waist elastic body 4a, a body elastic body 4b, and a leg elastic body 4c are attached in an extended state between the first and the second areas. In addition, left and right ears are formed at the front and rear ends of the outer sheet 10, and joint margins 6a and 6b are formed at the edges of the ears. By doing so, a waist opening is formed and a pair of leg openings is formed to form a pants-type.

The outermost sheet 11 is preferably extended and folded back and forth (11a portion in FIG. 1) and is laminated and adhered on the upper surface of the inner absorbing member 9 described later, so that the product is formed beautifully. .

On the other hand, the inner absorbent member 9 includes a liquid-impermeable back sheet 2 formed of a synthetic resin film, a liquid-permeable top sheet 3 formed of a synthetic fiber non-woven fabric, and crushed pulp or highly water-absorbing material. The absorbent body 1 (which may be wrapped with a thin paper if necessary) in which a heat-fusible fiber and a heat-fusible fiber are mixed. The length of the back sheet 2 in the width direction is formed to be wider than the width of the absorbent body 1, and the extending portions of the left and right side portions thereof are folded back to the upper surface of the absorbent body 1 to form the folded portion 2
a. The top sheet 3 is superposed on the folded back portion 2a, and both are bonded at the folded back portion to wrap the absorbent body 1. An X mark in FIG. 3 indicates a preferable application portion of the adhesive, and at this portion, the adhesive is applied at least over the entire length direction of the absorber 1.

With the above structure, the urine that has passed through the top sheet 3 is absorbed by the absorber 1, and the urine is temporarily stored inside the folded-back portion 2a of the back sheet 2 in the front-rear direction of the rear inner absorbent member. It is diffused and absorbed by the absorber 1. For this reason, it has been recognized that side leakage does not occur and the entire surface of the absorber can be effectively used, so that the absorption efficiency is remarkably improved as compared with the conventional case. It has become possible to reliably eliminate lateral leakage of urine that occurs due to poor adhesion between the top sheet and the back sheet as in conventional products.

It is preferable that a pair of rising gathers 5 and 5 are attached to the upper surface of the top sheet 3 along the left and right sides thereof. The rising gathers 5 are free from one side edge and are folded back at the front end side to form a bag shape, and an elastic body 51 in an extended state is additionally provided, and the rising root portion at the other end side is lengthwise on the upper surface of the top sheet 3. Glue along. A water-repellent non-woven fabric is used for the rising gathers 5 so that urine or the like does not pass through. Rising gather 5
It is preferable that the front and rear ends of the are joined to the top sheet 3 to form a pocket shape. With the rising gathers 5, urine that cannot pass through the topsheet 3 is captured without lateral leakage, and this urine is quickly diffused with time to pass through the topsheet 3 to absorb the urine. Can be absorbed into.

As shown by a dotted line 3A in FIG. 3, the top sheet 3 may be disposed on the lower surface side of the folded back portion 2a of the back sheet. In this case, the rising root of the rising gather 5 is It is directly adhered to the upper surface of the folded-back portion 2a so that urine or the like can be moved laterally.
It is surely blocked by a and the rising gather 5.

The width W of the folded portion 2a of the back sheet 2 is preferably 5 to 20 mm. If the length is shorter than 5 mm, it becomes difficult to bond the folded-back portion 2a and the top sheet 3, and if the length is longer than 20 mm, it is not preferable because the passage of urine on the top sheet 3 is hindered.

As shown in FIG. 2, when the planar shape of the absorbent body 1 is an hourglass shape which is constricted in the central portion, a part of the folded portion 2a (hatched portion 21) in this constricted portion.
May be laminated and adhered to the back sheet 2, or the folded-back portion 2a may be adhered only to the top sheet 3 to form a groove-shaped space in the constricted portion. .

Further, as shown in FIG. 2, the folded portion of the backsheet 2 is not limited to the left and right side portions (2a), and it is recommended that the folded portions 2b be formed at the front and rear ends as well. It is possible to prevent leakage of urine from the front and rear ends of the absorbent body which may be compressed due to exercise of a person.

(Experimental Example) After the disposable pants of the present invention product and the conventional product were worn on the doll model and brought to a recumbent posture,
Existence of lateral leak was examined by discharging 7 cc of artificial urine per second for 7 seconds. As a result, in the model using the conventional product, the lateral leakage occurred twice in the five experiments, whereas in the model of the present invention, the lateral leakage occurred once in the five experiments. There wasn't.

[0025]

Since the present invention is constructed as described above, the side portions of the absorbent body are completely covered by the folded portions of the back sheet, and urine, loose stools, etc. leak sideways from the disposable pants. Is gone. In addition, the groove formed by the folded portion has a function of diffusing urine in the front-back direction of the absorbent body and can absorb urine over the entire surface of the absorbent body, so that the absorption efficiency is remarkably increased as compared with the conventional disposable pants. did. Further, even if some non-bonding failure occurs between the top sheet and the back sheet, the presence of the folded-back portion can prevent lateral leakage of urine and the like, so that the yield in high-speed production can be improved.

[Brief description of drawings]

FIG. 1 is a disassembly explanatory diagram showing an embodiment of disposable pants of the present invention.

2 is a plan view of the absorber shown in FIG. 1. FIG.

3 is a cross-sectional explanatory view of the disposable pants shown in FIG.

FIG. 4 is a cross-sectional explanatory view of conventional disposable pants.

[Explanation of symbols]

 1 Absorber 2 Backsheet 3 Topsheet 5 Rising gathers 9 Inner absorbent member 10 Outer sheet

Claims (7)

[Claims] 1. An internal absorbent member having an absorbent body interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet, and an outer sheet disposed outside the internal absorbent member and formed into a pant shape. Disposable pants comprising the backsheet, the left and right sides in the width direction of the backsheet are folded back to the upper part of the absorber, and the folded portions are bonded to the lower surfaces of both sides of the topsheet in the width direction. 2. An internal absorbent member having an absorbent body interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet, and an outer sheet which is arranged outside the internal absorbent member and is formed into a pant type. Disposable pants comprising the backsheet, the left and right sides in the width direction of the backsheet are folded back to the upper part of the absorber, and the folded portions are adhered to the upper surfaces of both sides in the width direction of the topsheet. 3. A root portion of a rising gather having an elastic body in a stretched state attached to one side edge thereof is adhered to an upper surface of a top sheet located above a back sheet folding portion, and further from the root portion of the rising gather. The disposable pants according to claim 1, wherein a side edge portion extending outward is adhered to the outer sheet. 4. A side portion of a rising gather having a stretched elastic body attached to one side edge thereof is adhered to an upper surface of a folded-back portion of a back sheet, and further extends outward from the root portion of the rising gather. The disposable pants according to claim 2, wherein the edge portion is adhered to the outer sheet. 5. The disposable pants according to claim 3, wherein both end portions in the longitudinal direction of the rising gather are adhered to the upper surface of the top sheet. 6. The disposable pants according to claim 1, wherein both longitudinal ends of the backsheet are also folded back to cover the front and rear side surfaces of the absorbent body. 7. The outer sheet has a laminated structure of two-layer sheets, and between the two-layer sheets, a waist elastic body, leg elastic bodies, and waist elastic parallel to the waist elastic body. The disposable pants according to any one of claims 1 to 6, wherein the body is attached so as to be stretchable.