JPH07231904A - Absorbing product - Google Patents

Abstract

PURPOSE:To obtain an absorbing product such as a sanitary napkin or an incontinence treatment pad hard to leak, small in size, high in absorbing capacity and excellent in fitting easiness, fittness and fitting mobility. CONSTITUTION:In an absorbing product wherein an absorbing material 5 is put on the bottom part of a tray-shaped outer skin material 1 having definite depth composed of a liquid impermeable elastic foamed material sheet, the surface of the absorbing material 5 is covered with a liquid permeable porous surface sheet 6 and the rear surface thereof is covered with a flexible rear surface sheet 7. The surface sheet 6 and the rear surface sheet 7 are hermetically sealed to the outer peripheral edge of the absorbing material 5 and the absorbing material 5 is fixed to the bottom part of the tray-shaped outer skin material 1 and the position of the porous surface sheet 6 covering the surface inner peripheral edge end 13 of the absorbing material 5 is made less than the height of the side wall of the peripheral edge part of the tray-shaped outer skin material 1 and the elastic foamed material sheet is composed of a crosslinked polyethylene foam sheet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorbent product, more specifically, a small-sized sanitary napkin having a large absorption capacity, excellent fitability, fitability, and wearability, and incontinence treatment. Regarding absorbent products such as pads.

[0002]

2. Description of the Related Art As is well known, absorbent products such as sanitary napkins and incontinence treatment pads are used to alleviate discomfort such as menstruation and incontinence and prevent leakage of excrement.

Absorbent products such as sanitary napkins and incontinence pads are absorbed by interposing an absorbent material between a liquid-permeable porous sheet such as a nonwoven fabric and a liquid-impermeable skin material such as polyethylene film. It was constructed by joining and sealing a liquid-permeable porous surface sheet and a liquid-impermeable outer skin material at the outer peripheral edge of the material.

Since the constituent materials of the conventional absorbent products are all made of materials that are easily plastically deformed, the absorbent products are apt to be displaced, twisted, or bent due to the wearer's exercise. As a result, leakage easily occurs, and since there is no barrier on the surface sheet for blocking the flow of excrement, the leakage easily occurs.

Therefore, in order to prevent leakage due to deformation when the absorbent product is mounted, as an absorbent product that is difficult to deform,
The applicant of the present invention has previously disclosed the Japanese Utility Model Laid-Open No. 62-90622 and the Japanese Laid-Open Patent Publication No.
No. 221325 and JP-A-62-221326, the absorbent material 22 is held by the outer skin material 21 formed by forming a liquid impermeable elastic foam material sheet into a dish shape, and the liquid permeable surface sheet 23 is used. We came to propose a covered incontinence treatment pad (Fig. 3).

Since the outer skin material 21 which is formed of a liquid impermeable elastic foam material sheet forming the above-mentioned incontinence treatment pad into a dish shape has flexibility and elasticity, it is incontinence treated by exercise or the like. Even if the pad is deformed, the shape is restored so that it does not twist or remain twisted, and it has the advantage of preventing leakage of excrement due to loss of fit and collapse of the absorbent body. It was

On the other hand, in the sanitary napkin, in order to prevent the excrement from sliding down on the surface sheet, the same method as the three-dimensional gather used in the disposable diaper is used.
The one in which a barrier for blocking the flow of excrement is formed on the surface sheet has been proposed and put into practical use.

[0008]

According to the above-mentioned conventional technique, the outer skin material 21 formed of the liquid impermeable elastic foam material sheet forming the incontinence treatment pad into a dish shape has flexibility and elasticity. Therefore, even if the incontinence treatment pad is deformed due to exercise or the like, the shape of the incontinence pad is restored so that it does not remain twisted or twisted, preventing leakage of excrement due to loss of fit and collapse of the absorber. Although it is possible, a surface sheet 23 covering the absorbent material 22 held by the outer skin material 21 formed in a dish shape is planarly joined to the end portion of the side wall 24 at the peripheral edge portion of the outer skin material 21. Therefore (FIG. 4), there is a problem that the excrement does not permeate the surface sheet 23 and slips on the surface thereof.

When a barrier such as a three-dimensional gather is formed on the top sheet of the sanitary napkin, the three-dimensional gather formed on the top sheet serves as a barrier for blocking excrement. Although the flow of excrement above is prevented to some extent, the height of the three-dimensional gathers that are formed is limited because the sanitary napkin itself is small, and the leakage of excrement is reliably prevented. This is not possible, and moreover, it takes time and effort to form the above-mentioned three-dimensional gathers, resulting in high cost.

[0010]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the problems of the prior art as described above, and it is small in size and has a large absorption capacity. In addition to being an absorbent product such as a sanitary napkin and an incontinence treatment pad that is excellent in leak resistance and does not easily leak, it is possible to prevent leakage due to gliding of excrement on the surface sheet without using three-dimensional gathers. It is an object of the present invention to provide an absorbent product that can reduce the manufacturing cost.

[0011]

In order to achieve the above object, the present invention has the following technical means. That is, to explain with reference to the reference numerals used in the accompanying drawings corresponding to the embodiments, the absorbent material 5 is accommodated in the bottom portion 2 of the dish-shaped outer skin material 1 made of a liquid-impermeable elastic foam material sheet and having a certain depth. In the absorbed product
The surface of the absorbent material 5 is covered with a liquid-permeable porous surface sheet 6 and the back surface thereof is covered with a flexible back surface sheet 7. The surface sheet 6 and the back surface sheet 7 are hermetically sealed at the outer peripheral edge 12 of the absorbent material 5. 8, the absorbent material 5 is fixed to the bottom portion 2 of the dish-shaped skin material 1, and the position of the porous surface sheet 11 that covers the surface inner peripheral edge 13 of the absorbent material 5 is the dish-shaped skin material. 1 is lower than the height of the side wall 3 forming the peripheral portion of the absorbent article 1.

A groove 9 is provided between the porous surface sheet 11 that covers the peripheral edge 13 of the absorbent material 5 and the inner surface of the side wall 3 that forms the peripheral edge of the dish-shaped skin material 1. An absorbent product characterized by the fact that a flange 4 is formed at the free end of a side wall 3 forming the peripheral portion of the dish-shaped outer skin material 1 and extends outward of the dish-shaped outer skin material. It is a product.

[0013]

The present invention comprises the above technical means, and since the dish-shaped skin material 1 constituting the absorbent product is made of the elastic foam material sheet, it has flexibility and elasticity, and has shape retention. Even if the incontinence treatment pad is deformed due to exercise, it immediately recovers its shape, so it does not remain twisted or twisted, preventing the loss of fit and the leakage of excrement due to the collapse of the absorber. Moreover, the porous topsheet 6 and the flexible backsheet 7 fixed to the bottom portion 2 of the dish-shaped outer cover material 1
Since the surface peripheral edge 13 of the absorbent material 5 covered by is located at a position lower than the height of the side wall 3 forming the peripheral portion of the dish-shaped outer skin material 1, even if the porous material covering the surface of the absorbent material 5 is porous. Even if the excrement slips on the surface of the topsheet 6, the excrement does not exceed the side wall 3 forming the peripheral edge of the dish-shaped outer cover material 1, so that the excrement can be surely prevented from leaking. Is.

Then, the porous topsheet 6 of the absorbent 5 covered with the porous topsheet 6 and the flexible backsheet 7 and the side wall 3 forming the peripheral portion of the dish-shaped outer cover material 1.
By forming the groove 9 between the inner surface and the inner surface, the excrement gliding on the porous surface sheet 6 covering the surface of the absorbent material 5 is guided into the groove 9, and the periphery of the absorbent material 5 is guided along the groove 9. As a result, the excrement is prevented from leaking, and its absorbability is improved.

Further, the free end of the side wall 3 forming the peripheral portion of the dish-shaped outer cover material 1 is provided with a flange 4 directed outward.
By forming the plate-shaped outer skin material 1, the shape-retaining property of the dish-shaped skin material 1 becomes good, and the fitting property of the absorbent product to the mounting portion becomes good, and moreover, the peripheral portion of the dish-shaped skin material 1 is formed. Even if the side wall 3 does not easily fall inward and the side wall 3 falls inward, the flange 4 functions as a substitute for the side wall 3, so that leakage of excrement can be more reliably prevented.

Since the dish-shaped outer cover material 1 can be easily integrally formed by a method such as vacuum forming, it has excellent workability as compared with the case where a three-dimensional gather or the like is formed, and its manufacturing cost is reduced. The reduction can be easily realized.

[0017]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. As shown in FIGS. 1 and 2, the absorbent product of the present invention has an absorbent material 5 housed in a bottom portion 2 of a dish-shaped outer skin material 1 made of a liquid-impermeable elastic foam sheet and having a certain depth. It consists of The front surface and the back surface of the absorbent material 5 are covered with a liquid-permeable porous top sheet 6 and a flexible back sheet 7, respectively. Moreover, the top sheet 6 and the back sheet 7 are the outer peripheral edge 1 of the absorbent material 5.
2 is hermetically sealed 8, and the absorbent material 5 is fixed to the bottom portion 2 of the dish-shaped outer skin material 1 and is a porous material that covers the surface inner peripheral edge 13 of the absorbent material 5. The position of the topsheet 11 is lower than the height of the side wall 3 forming the peripheral edge of the dish-shaped outer cover material 1.

The shape of the dish-shaped outer cover material 1 is not particularly limited, and various ones can be considered.
Usually, it has a projection plane of rectangle, oval, ellipse, hourglass, gourd, violin, saddle, etc., and its size depends on the type of sanitary napkin, incontinence treatment pad, etc. and its application. Although different, it is generally about 150 to 500 mm in length and about 40 to 180 mm in width, and the depth of the dish-shaped outer cover material 1 is usually
The thickness is preferably 3 to 40 mm, and if it is less than 3 mm, the effect as a barrier is small, and if it exceeds 40 mm, it is bulky and impairs the fitting property.

As the elastic foam material sheet forming the dish-shaped outer cover material 1, polyethylene, polypropylene, polybutylene, vinyl chloride, ethylene vinyl acetate,
Foam sheets with closed cells such as ethylene-methyl acrylate copolymers, polyesters, polyurethanes, silicone elastomers are considered, among which a thickness of 1.5
~ 5 mm, expansion ratio 15-35 times, about 110-200 ° C
A radiation-crosslinked polyethylene foam sheet that can be heat-molded with is preferable, and an absorbent product excellent in moldability and shape retention can be manufactured at low cost.

As the absorbent material 5, cotton-like pulp, water absorbent paper, polymer water absorbent material, etc. are usually considered.
It is also possible to use other known absorbent materials, and the planar shape and dimensions thereof may be any as long as they can be accommodated in the bottom portion 2 of the dish-shaped outer skin material 1, but within the surface of the absorbent material 5. The position of the topsheet 11 covering the peripheral edge 13 must be lower than the height of the side wall 3 forming the peripheral portion of the dish-shaped skin material 1, and in addition, the outer peripheral edge 12 thereof is the dish-shaped skin material 1. It is preferable that the groove 9 is formed between the topsheet 6 and the side wall 3 without contacting the side wall 3 forming the peripheral edge portion of the side wall 3. The surface sheet covering the central portion of the absorbent 5 may be higher than the height of the side wall 3.

Further, a flange 4 is formed at the free end of the side wall 3 forming the peripheral portion of the dish-shaped outer cover material 1 so as to extend toward the outside of the dish-shaped outer cover material 1. 1 has a good shape retention property and at the same time has a good fit property with respect to the mounting portion of the absorbent product, and moreover, the side wall 3 forming the peripheral portion of the dish-shaped outer skin material 1 is hard to fall inward, and even if the side wall 3 Even if the incline falls inward, since the flange 4 functions as a substitute for the side wall 3, leakage of excrement can be more reliably prevented.

The porous surface sheet 6 may be a known porous sheet used for sanitary napkins, incontinence treatment pads, etc., such as polyolefin-based or polyester-based dry non-woven fabric, perforated polyethylene film, etc. The flexible back sheet 7 may be made of the same material as that of the surface sheet 6, but may be the bottom 2 itself of the dish-shaped skin material 1 made of an elastic foam sheet. Furthermore, a wet non-woven fabric or a polyethylene sheet may be used.

Then, the top sheet 6 and the back sheet 7
As the method for hermetically sealing the outer peripheral edge 12 of the above, a hot melt adhesive method, a heat welding seal, an ultrasonic seal, or the like can be used, and the absorber 5 is fixed to the bottom 2 of the dish-shaped skin material 1. As a method of doing so, it is preferable to bond and fix the back sheet 7 by a hot melt bonding method.

Next, a specific example of the absorbent product having the above structure will be described. As the absorbent product, an incontinence treated pad is manufactured, and its dimensions are 26 cm in length, 7.5 cm in width in narrow portion, 13 cm in wide portion, 15 mm in depth, 10 mm in flange width, and dish-shaped. The peripheral side wall of the skin material stands upright at an angle of 105 degrees with respect to the bottom surface, and when the absorbent material 5 is fixed to the bottom portion 2 of the dish-shaped skin material 1, the dish-shaped skin material 1
5 m between the side wall 3 and the surface inner peripheral edge 13 of the absorbent 5.
A gap of m is formed, and a groove 9 having a gap of about 5 mm is formed between the outer peripheral edge 12 and the inner surface of the side wall 3 of the dish-shaped skin material 1.

The material of each part constituting the absorbent product will be described in detail. The elastic foam sheet forming the dish-shaped outer cover material 1 is a radiation-crosslinked polyethylene foam sheet having a thickness of 3 mm. It was formed into a dish shape by vacuum forming at a foaming ratio of 20 times and at about 140 ° C., and for the topsheet 6, a nonwoven fabric of a composite fiber composed of a polyethylene sheath and a polypropylene core having a basis weight of 16 g / m 2 was used.

Further, the absorbent material 5 was obtained by coating a mixture of 10 g of Southern pine type cotton-like pulp and 10 g of crosslinked polyacrylic acid type polymer absorbent material with water absorbent paper (basis weight of 20 g / m 2) and heat embossing. And the thickness is 10
mm, and the back sheet 7 is a heat-adhesive wet rayon-based non-woven fabric used for tea bags (basis weight: 15 g / m2).
Was used.

Then, the top sheet 6 and the back sheet 7
The hermetic seal 8 at the outer peripheral edge 12 is formed by thermal bonding at 140 ° C., and the dish-shaped outer skin material 1 of the absorbent material 5 is formed.
The bottom portion 2 is fixed to the bottom portion 2 by applying hot melt 10 to the bottom portion 2 by a spiral method, and the absorbent material 5 covered with the back sheet 7 is pressed and adhered thereto.

The absorbent product manufactured as described above is excellent in moldability and shape retention because the dish-shaped outer cover material 1 is made of a polyethylene foam sheet cross-linked by radiation. Can be manufactured at low cost, and the fitting property at the time of mounting can be improved, and moreover, since the flange 4 is formed on the side wall 3 of the peripheral portion of the dish-shaped outer cover material 1, a better mounting can be achieved. It is a feeling.

Further, since a gap and a groove 9 are formed between the side wall 3 at the peripheral portion of the dish-shaped outer skin material 1 and the absorbent material 5, the surface sheet 6 covering the surface of the absorbent material 5 is formed. The excrement that has slid through the wall flows along the groove 9, and the side wall 3 at the peripheral portion of the dish-shaped outer cover material 1 serves as a barrier to prevent the excrement from leaking. Even if the side wall 3 is collapsed, the flange 4 formed at the end of the side wall 3 functions as a barrier instead of the side wall 3, so that the leakage of excrement is surely prevented. .

The water absorbing material 5 obtained by coating the mixture of the Southern pine type cotton-like pulp and the crosslinked polyacrylic acid type polymer absorbent with water absorbing paper and subjecting to hot embossing is very good. Since it has water absorption, it is possible to manufacture an absorbent product having sufficient water absorption.

[0031]

As described above in detail, according to the present invention, the following effects can be obtained. That is, according to the first aspect, since the dish-shaped skin material constituting the absorbent product is made of the elastic foam material sheet, it has flexibility and elasticity, excellent shape retention, and incontinence due to exercise or the like. Even if the processing pad is deformed, the shape of the processing pad is restored so that it does not twist or remain twisted, and it is possible to prevent leakage of excrement due to loss of fit and collapse of the absorbent body. Since the top of the absorbent, which is fixed to the bottom of the plate and is covered by the porous surface sheet and the flexible back sheet, is located lower than the height of the peripheral side wall of the dish-shaped skin material, Even if excrement slips on the surface of the porous surface sheet that covers the surface of
Since the excrement does not cross the peripheral side wall of the dish-shaped skin material, leakage of the excrement can be reliably prevented. In addition, the dish-shaped skin material can be easily integrated by a method such as vacuum forming. It is possible to provide an absorbent product which is excellent in workability and can be easily reduced in manufacturing cost as compared with the case where a three-dimensional gather or the like is formed, since the absorbent product can be molded in a desired manner.

According to the second aspect, by using the cross-linked polyethylene foam sheet as the elastic foam sheet forming the dish-shaped outer skin material, an absorbent product excellent in moldability and shape retention can be manufactured at low cost. It is a thing.

According to a third aspect of the present invention, between the porous topsheet of the absorbent material covered with the porous topsheet and the flexible backsheet and the inner surface of the side wall forming the peripheral portion of the dish-shaped outer cover material. By forming the groove, the excrement that slid on the porous surface sheet that covers the surface of the absorbent body is guided into the groove and flows around the absorbent body along the groove, preventing the leakage of the excrement. As a result, the absorbability is also improved.

Further, according to a fourth aspect of the present invention, the shape-preserving property of the dish-shaped skin material is improved by forming a flange toward the outside at the free end of the side wall forming the peripheral portion of the dish-shaped skin material. In addition to being good, the fitting property of the absorbent product to the mounting portion is good, and moreover, even if the side wall forming the peripheral portion of the dish-shaped skin material does not easily fall inward, even if the side wall falls inward. Also, since the flange functions as a side wall, leakage of excrement can be more reliably prevented.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a configuration of an absorbent product of the present invention.

FIG. 2 is a sectional view showing a sectional shape of an absorbent product of the present invention.

FIG. 3 is a configuration diagram showing a configuration of a conventional absorbent product.

FIG. 4 is a sectional view showing a sectional shape of a conventional absorbent product.

[Explanation of symbols]

 1 Dish-shaped outer cover material 2 Bottom part 3 Side wall 4 Flange 5 Absorbent material 6 Surface sheet 7 Back surface sheet 8 Sealing seal 9 Groove 11 Surface peripheral edge part of surface sheet 12 Outer peripheral edge 13 Absorbent surface inner peripheral edge

Claims (4)

[Claims] 1. An absorbent product in which an absorbent material 5 is accommodated in a bottom portion 2 of a dish-shaped outer skin material 1 made of a liquid impermeable elastic foam material sheet and having a constant depth, wherein the surface of the absorbent material 5 is The back surface of the liquid-permeable porous topsheet 6 is covered with a flexible backsheet 7, and the topsheet 6 and the backsheet 7 are hermetically sealed at the outer peripheral edge 12 of the absorbent material 5. Is fixed to the bottom portion 2 of the dish-shaped skin material 1, and the position of the porous surface sheet 11 that covers the surface inner peripheral edge 13 of the absorbent material 5 forms the peripheral edge portion of the dish-shaped skin material 1. Absorbent product characterized by being lower than the height of the side wall 3. 2. The absorbent product according to claim 1, wherein the elastic foam sheet forming the dish-shaped outer cover material 1 comprises a crosslinked polyethylene foam sheet. 3. A groove 9 is provided between the porous surface sheet 11 covering the peripheral edge 13 of the absorbent material 5 and the inner surface of the side wall 3 forming the peripheral edge portion of the dish-shaped outer cover material 1. The absorbent product according to claim 1. 4. A flange 4 is formed at a free end of a side wall 3 forming a peripheral portion of the dish-shaped skin material 1 so as to extend toward the outside of the dish-shaped skin material 1. Absorbed product as described.