JPH07184947A - Disposable diaper - Google Patents

Abstract

PURPOSE:To surely prevent the front and back leakage in the disposable diaper. CONSTITUTION:An elastic stretching member 8 is arranged at an end flap part EF of the disposable diaper while being interposed between a liquid permeable sheet 2 and a liquid impermeable sheet 1, waist barrier sheets Bw are arranged at the front and back ends of the diaper over the end flap part EF and an absorbent 3 and over a gap between barrier cuffs Bs on both the sides, and a pocket space opened inside is formed by this waist part barrier sheet Bw. Further, concerning the waist part barrier sheet Bw, the contact face with the end flap part EF is fixed, a distant end part 10 at the top end of barrier cuffs is not fixed at least, and both the end parts beyond the distant end 10 of the barrier cuffs B is fixed to the sheet surface forming the barrier cuffs Bs.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable diaper which effectively prevents leakage from the front-back direction of the diaper.

[0002]

2. Description of the Related Art As is well known, the disposable diapers that have been provided on the market have an absorbent body between a liquid-permeable sheet and a liquid-impermeable sheet, and the absorbent body is interposed at the waist. Not only the end flap part is formed, but also the elastic flap member is interposed in this end flap part to form a gather, and the paper diaper is fitted around the waist of the wearer to prevent leakage from the waist (so-called front-back leakage). In addition, it prevents slippage.

[0003]

However, the waist gather formed by the elastic stretchable member arranged in the waist portion can make the waist portion of the diaper adhere to the skin, but at the same time, the waist portion is stretched by the stretching force. Since small wrinkles are formed in the wavy shape, if there is a large amount of excrement while lying down, the excrement circulated to the waist or abdomen may leak outside from the passage formed by the wrinkles. there were.

On the other hand, in order to prevent stuffiness of the diaper when the diaper is worn, Japanese Patent Laid-Open Publication No. 49-144601.
In JP-A-60-17101, the elastic band and the front and back sheets are intermittently fixed to each other, the front and back sheets are positively ruffled, an air passage is formed between the elastic band and the elastic sheet, and when attached,
A technique has been proposed in which stuffiness from the inside is allowed to escape through this ventilation path. In this case, although an effect can be expected in terms of suppressing stuffiness, it results in promoting leakage from the ventilation path.

Therefore, an object of the present invention is to provide a disposable diaper which surely prevents not only lateral leakage of urine or loose stool but also front and rear leakage and has a comfortable wearing feeling.

[0006]

Means for Solving the Problems The above-mentioned problem is that an absorbent body is interposed between a liquid-permeable sheet and a liquid-impermeable sheet, and the distal end portion of the tip is provided on both sides of the paper diaper over substantially the entire length of the diaper. Disposable diapers that have barrier cuffs projecting to the front side formed by elastic elastic members attached to the lengthwise end of the disposable diaper, and end flaps that extend outward of the edges of the absorbent body and do not have an absorbent body at the front and rear ends of the paper diaper. In the end flap portion of the disposable diaper, an elastic elastic member is provided between the liquid-permeable sheet and the liquid-impermeable sheet, and at least one end side of the front and rear ends of the disposable diaper, A waist barrier sheet for straddling the end flap portion and the absorber and straddling the barrier cuffs on both sides to form an inwardly opening pocket is disposed, and Part of the barrier sheet has the contact surface with the end flaps fixed, and at least the distal end of the barrier cuff tip is not fixed, and both ends beyond the distal end of the barrier cuff form the barrier cuff. The problem can be solved by being fixed to the sheet surface to be used.

[0007] Here, the waist barrier sheet itself is breathable to prevent stuffiness, and has elastic elasticity so that it can be adhered to the skin.

Further, by extending both side edges of the waist barrier sheet to a position corresponding to or higher than the rising point of the barrier cuffs, the waist barrier sheet overlaps the rising surface sheet of the cuffs at the front and rear end portions of the barrier cuffs, Since it can be double or more, front and rear leakage can be effectively prevented.

[0009]

According to the present invention, a waist barrier sheet is provided so as to straddle the end flap portion and the absorbent body and straddle the barrier cuffs on both sides, and a pocket that is opened inward by the waist barrier sheet. A space is formed.
When the waist barrier sheet is arranged so as to straddle between the barrier cuffs, the waist barrier sheet stands up by receiving the standing force of the barrier cuffs, and can properly receive urine and loose stool in the pocket space.

In the lumbar barrier sheet, the contact surface with the end flap portion is fixed, and the distal end portion of the tip of the barrier cuff is not fixed, and both end portions beyond the distal end of the barrier cuff are set as the barrier cuff surface. Stick to it. An elastic elastic member such as a rubber thread is usually fixed to the distal end of the barrier cuff, and the elastic force causes the barrier cuff to stand up. When the diaper is observed before wearing, the tip of the barrier cuff is as shown in FIG. The part line gradually expands in a V shape from the elastic elastic member fixing points at the front and rear ends of the diaper to the central part. If the lumbar barrier sheet and the distal end of the barrier cuffs are fixed, the lumbar barrier sheet receives the component forces F, F in opposite directions in the left and right directions due to the stretching force of the rubber elastic elastic member. The force will prevent the waist barrier sheet from standing up. Therefore, in the present invention, by fixing the waist barrier sheet in a state where it is not fixed to the distal end portion of the tip of the barrier cuff, it is possible to avoid being restrained by the elastic stretchable member arranged at the distal end of the barrier cuff. , The waist barrier sheet can be effectively erected.

Further, the waist barrier sheet has hydrophilicity on the surface side and water repellency on the back surface side facing the liquid permeable sheet, so that it is soft to the touch and the wearing feeling can be improved. A water-repellent film on the back side can block drainage and the like to prevent leakage. Further, if leakage prevention is important, both the front and back surfaces of the barrier sheet facing the liquid-permeable sheet may be made water-repellent, and if importance is attached to the feel of the skin, the surface of the barrier sheet Both the liquid-permeable sheet facing surfaces on the side and the back surface can be made hydrophilic.

[0012]

EXAMPLES The present invention will be described in detail below based on examples.
In FIG. 1, a disposable diaper includes a liquid-impermeable sheet 1 made of polyethylene or the like and a liquid-permeable sheet 2 made of nonwoven fabric or the like.
And an absorbent body 3 made of cotton-like pulp or the like and interposed between the liquid-impermeable sheet 1 and the liquid-permeable sheet 2 and having a certain degree of rigidity such as a rectangular or hourglass shape. . Further, the liquid-permeable sheet 1 and the liquid-permeable sheet 2 extend on the ventral side and the dorsal side, and end flaps EF in which the absorbent body 3 does not exist are formed. Between the elastic sheet 1 and the liquid-permeable sheet 2, elastic stretchable members 8 made of urethane foam or the like and having air permeability are interposed to form waist gathers. Fastening tapes 6, 6 are fixed to both sides on the back side.

The liquid-impervious sheet 1 extends outwardly from the periphery of the absorbent body 3 to form an hourglass shape, and its laterally extending portion has a side barrier sheet 4 and a transparent sheet which will be described later. The side flap portion SF is configured together with the side portion of the liquid sheet 2. The liquid-permeable sheet 2 has a rectangular shape, and extends slightly outward from the side edge of the absorber 3 in the leg part, and is fixed to the liquid-impermeable sheet 1 with a hot melt adhesive or the like.
As a material for forming the side barrier sheet 4, a plastic sheet can be used, but a nonwoven fabric treated with water or the like with silicone or the like is preferably used from the viewpoint of the feel to the skin.

The side barrier sheets 4 and 4 provide barrier cuffs B _S and B _{S on} both sides of the paper diaper so as to face both sides along the longitudinal direction of the diaper so as to project to the use surface side (front surface side). Has been formed. As shown in detail in FIG. 2, the barrier cuffs B _S , B _S have a side barrier sheet 4 extending substantially corresponding to the width direction corresponding to the liquid impermeable sheet 1, and a side flap. In addition to being fixed at the portion SF, it has a standing end slightly inside the absorber 3 and its tip is double-folded, and one elastic stretchable rubber 5 is provided inside this folded-back part, or if necessary. By arranging a plurality of elastic stretchable rubbers, the stretchable force is used to raise the barrier cuffs B _S.
Further, for example, four elastic elastic members 7 for gasket cuffs are fixed to the liquid-impervious sheet 1 by a hot melt adhesive or the like on the side flaps SF outside the barrier cuffs B _S , B _S. The fold-like gasket cuff G is formed by the stretching force. The barrier cuffs B _S , B _S come into contact with the wearer's legs when they are worn, and are surrounded by the barrier cuffs B _S , B _S and the liquid-permeable sheet 2 to allow the urine or soft stools to have a substantially trapezoidal opening. When a urine is excreted in this space, the urine passes through the liquid permeable sheet 2 and is absorbed in the absorbent body 3, and the solid stool solids are separated by the barrier cuff B. _S and B _S become barriers to prevent them from getting over. Even if urine leaks laterally after getting over the barrier cuffs B _S , the lateral leakage is prevented by the gasket cuffs G formed by the elastic expansion / contraction members 7, 7.

On the other hand, in the disposable diaper according to the present invention,
Lumbar barrier sheets B _W and B _W are provided so as to straddle the end flap portion EF and the absorber 3 and also between the barrier cuffs B _S and B _S on both sides. The waist barrier sheet B _W, as shown the area with hatching in FIG. 2, the contact surface between the end flap portion EF is fixed, and both end portions to which the survived tip of Bariyakafusu B _S is the Bariyakafusu B _S It is fixed to the side barrier sheet 4 that is being formed, and the distal end 10 portion of the barrier cuff B _S is not fixed. With this configuration, it is possible to effectively stand up on the use surface side for the reason described in detail in the section of action.

The waist barrier sheet B _W is preferably provided at both ends on the back side and the abdomen side, but since front-back leakage is likely to occur mainly on the back side, it may be provided only on the back side.

The waist barrier sheet B _W is a sheet satisfying a predetermined hydrophilicity, for example, ES fibers (polypropylene fibers coated with polyethylene) which are heat-melting fibers, ET fibers (polyester fibers). Synthetic fibers such as those coated with polyethylene), polyester fibers, polyethylene fibers and polypropylene fibers can be preferably used. Also, a small amount (1 to 10% by weight) of hydrophilic fiber such as rayon fiber may be mixed with the synthetic fiber. In addition, when using elastic stretchable materials, in addition to urethane rubber, natural rubber, rigid rubber, 84
"Spandex" of about 0d, "KER-2207" manufactured by 3M
Foam of polyethylene, polyurethane, styrene butadiene, silicon, polyester, vinyl chloride, neoprene rubber, made from Bridgestone, "Everlite SG"
WS "," Moltoprene RS "manufactured by Inoue MTB
Can be mentioned.

Further, since the synthetic fiber material is generally poor in moisture absorption and water absorption, it is possible to impart moisture absorption and water absorption by a hydrophilic treatment. As the hydrophilic treatment, a compound having a hydrophilic group, such as a polyethylene glycol oxidation product, is allowed to coexist and polymerize during the synthetic fiber production process, or a treatment with a metal salt such as stannic chloride is performed.
The surface can be partially dissolved to make it porous and the metal hydroxide can be deposited by a method such as swelling or making the synthetic fiber porous so as to impart hydrophilicity by applying capillary reduction.

Further, when the liquid content of urine or loose stools is absorbed by the waist barrier sheet B _W , it may give a feeling of dampness to the skin and cause discomfort to the wearer. Therefore, the above material is used as the barrier sheet. On the other hand, the back surface side (opposite surface of the liquid-permeable sheet 2) of the waist barrier sheet B _W is coated with a silicone-based, paraffin metal soap-based, or alkylchromic chloride-based water repellent agent, or is made of a hydrophobic sheet such as a polyethylene sheet. By using a sheet laminated with a sheet and a hydrophilic non-woven fabric, the surface that comes into contact with the skin is hygroscopic, absorbs sweat, and feels good on the skin, while urination is blocked by the water-repellent coating film, making the skin moist. No more giving.

These hydrophilic treatments or water repellent treatments are appropriately applied.
Various combinations can be applied to each surface of the waist barrier sheet B _W. Also, the waist barrier sheet B
The length L of _{W in} the diaper width direction is at least not less than the dimension that extends over both barrier cuffs B _S , B _S , and it is preferable that both end edges of the W are at positions corresponding to the rising points of the barrier cuffs B _S (see FIG. 2).
The position of the line K in FIG. Further, it may be arranged so as to extend to the vicinity of the fixing tape 6 on both ends of the diaper.

The length S in the longitudinal direction of the diaper extends at least 10 mm inward from the edge of the absorbent body 3, preferably 20 mm or more on the back side, and the ventral side. If this is the case, the length should be about 10 to 20 mm.

[0022]

As described above in detail, according to the present invention, not only lateral leakage of urine or loose feces but also front and rear leakage can be reliably prevented. Also, the feeling of wearing becomes good.

[Brief description of drawings]

FIG. 1 is a partially cutaway exploded view of a disposable diaper according to the present invention.

FIG. 2 is an enlarged development view of essential parts of the disposable diaper according to the present invention.

FIG. 3 is a perspective view of the disposable diaper according to the present invention.

[Explanation of symbols]

1 ... Liquid-impermeable sheet, 2 ... Liquid-permeable sheet, 3 ... Absorber,
4 ... Leg barrier sheet, 5 ... Lumbar barrier sheet, 6 ... Fixing tape, 7 ... Thread elastic rubber, 8 ... Elastic elastic member, 10
… Distal end, B _S … Barrier cuffs, B _W … Lumbar barrier sheet, G… Gasket cuffs, SF… Side flaps, E
F ... End flap

Claims (6)

[Claims] 1. An elastic body, in which an absorbent body is interposed between a liquid-permeable sheet and a liquid-impermeable sheet, and which is attached to both sides of a disposable diaper over the entire length of the diaper in a longitudinal manner at the distal end of the tip. In the disposable diaper having barrier cuffs protruding to the front surface side formed by the elastic member, and having end flap portions extending outward of the absorbent body edge and having no absorbent body at the front and rear ends of the paper diaper, the end flaps of the disposable diaper. The elastic stretchable member is provided between the liquid-permeable sheet and the liquid-impermeable sheet with respect to the portion, at least one end side of the front and rear ends of the disposable diaper, the end flap portion and the absorbent body. A waist barrier sheet is provided for straddling and straddling between the barrier cuffs on both sides to form an inwardly opening pocket, and the waist barrier sheet is provided with an end flap. The contact surface with the wrap is fixed, and both ends beyond the distal end of the barrier cuff with at least the distal end of the barrier cuff are not fixed to the seat surface that forms the barrier cuff. A disposable diaper characterized by being fixed. 2. The disposable diaper according to claim 1, wherein a material having breathability and elasticity is used as the waist barrier sheet. 3. The disposable diaper according to claim 1, wherein both side edges of the waist barrier sheet extend to the outside of the position corresponding to the rising point of the barrier cuffs. 4. The disposable diaper according to any one of claims 1 to 3, wherein the front surface side of the waist barrier sheet is made hydrophilic, and the rear surface side thereof facing the liquid permeable sheet is made water repellent. 5. The surface-facing and back-side surfaces of the waist barrier sheet facing the liquid permeable sheet are both water repellent.
The disposable diaper described in 3. 6. The front surface side and the back surface side of the waist barrier sheet, both surfaces of which face the liquid permeable sheet, are made hydrophilic.
The disposable diaper described in 3.