JPH07184955A - Disposable diaper - Google Patents

Abstract

PURPOSE:To surrely prevent the leakage in the front and back parts of the disposable diaper and to reduce the number of assembly processes of a waist part. CONSTITUTION:An elastic waist barrier sheet BW is spread over the end flap part EF and an absorbent 3 in before and back ends of the disposable diaper and is spread over the barrier cuffs BS on both sides. The waist band W is formed at the fixed part of the waist barrier sheet BW and the end flap part EF by the expansion and contraction power of the waist barrier sheet BW. A pocket opening inside is formed at the unfixed part at the inner edge side.

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.

On the other hand, it has been proposed to form a pocket on the waist portion by using a hydrophobic sheet or the like, but in that case, the assembly is carried out by the step of disposing an elastic stretchable member on the end flap portion, and the hydrophobic sheet on the waist portion. You have to go through the steps such as mounting.

Therefore, an object of the present invention is to provide a disposable diaper which can prevent not only side leakage of urine or loose stool but also front and rear leakage, and also has a good feeling of wearing and simplification of assembling steps. Is.

[0007]

[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 a side barrier sheet is provided on both sides of a disposable diaper over substantially the entire length of the diaper. At least one end of the front and rear ends of the disposable diaper in which a barrier cuff that protrudes to the side is formed, and at the front and rear ends of the disposable diaper having end flaps that extend outward of the absorbent body edge and do not have an absorber On the side, while straddling the end flap portion and the absorber, straddling between the barrier cuffs on both sides, an elastic stretchable waist barrier sheet is provided, and the waist barrier sheet and the end flap portion are fixed to each other. The problem can be solved by forming a waist band by the elastic force of the waist barrier sheet in that portion and forming a pocket that opens inward at the non-fixed portion on the inner edge side.

[0008]

According to the present invention, an elastic elastic waist barrier sheet is provided so as to straddle the end flap portion and the absorber and between the barrier cuffs on both sides. The waist barrier sheet and the end flap are disposed. A waist band is formed by the elastic force of the waist barrier sheet at the portion fixed to the section, and a pocket opening inward is formed at the non-fixed portion on the inner edge side.

Therefore, in the past, the elastic stretchable member was disposed in the waist portion in order to form the waist gather, but according to the present invention, the waist gather is simultaneously formed by the elastic stretchable waist barrier sheet. ,
The assembly process can be simplified accordingly.

Further, since the waist barrier sheet is arranged so as to straddle between the barrier cuffs, it becomes able to stand up by receiving the standing force of the barrier cuffs, and it is possible to firmly receive urine and loose stool in the pocket space. it can.

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, on the ventral side and the dorsal side, an end flap portion EF in which the liquid impermeable sheet 1 and the liquid permeable sheet 2 extend and the absorber 3 does not exist is formed. In addition, fastening tapes 6 and 6
6 is fixed.

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,
Elastic stretchable lumbar barrier sheets B _W and B _W are provided so as to straddle the end flap portion EF and the absorber 3 and straddle the barrier cuffs B _S and B _S on both sides.
The waist barrier sheet B _W has its contact surface fixed to the end flap portion EF as shown by the hatched area in FIG. 2, and the waist band W is formed by the stretching force at this fixed portion. The waist barrier sheet B _W and the end flap portion EF may be fixed to each other continuously or intermittently.

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.

As the waist barrier sheet B _W , in addition to urethane rubber, natural rubber, and rigid rubber, a heat-shrinkable material such as "Spandex" of about 840d, "KER-2207" manufactured by 3M Company, and a soft touch. From the point of having air permeability and polyethylene, polyurethane, styrene butadiene, silicon, polyester, vinyl chloride, foam of neoprene rubber, "Everlite SGWS" manufactured by Bridgestone Co., Ltd. and "Moltoprene RS" manufactured by Inoue MTB Co., Ltd. may be mentioned. it can.

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, hydrophilicity can be imparted by a method in which 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.

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 the sheet laminated with the sheet, the surface that comes into contact with the skin is hygroscopic, absorbs sweat, and feels good on the skin, and urination is blocked by the water-repellent coating film, so that the skin does not feel wet. These hydrophilic treatments or water repellent treatments can be appropriately applied to each surface of the waist barrier sheet B _W in various combinations.

Further, in the present invention, even if the stretchable sheet-shaped members 4 and 5 themselves do not have elastic stretchability as a material, they are configured to have substantially such a function. May be. For example, as shown in FIGS. 4 and 5, a non-woven fabric may be folded or wound in several layers, and a plurality of thread-shaped elastic rubbers 9, 9 ...

Further, the length L of the waist barrier sheet B _{W in} the width direction of the diaper is at least both barrier cuffs B _S , B.
And the _S astride size or more, the length S of the diaper longitudinal direction is intended to extend at least from the edges of the absorbent body 3 inwardly than 10 mm, if preferably the dorsal 20
It is preferable that the length is not less than mm and the length is about 10 to 20 mm on the ventral side.

[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. Further, the number of man-hours for assembling the waist portion can be reduced to improve the manufacturing efficiency, and the wearing feeling can be improved.

[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.

FIG. 4 is a main part perspective view showing another example of the waist barrier sheet.

FIG. 5 is a perspective view of a main part showing another example of a waist barrier sheet.

[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 expansion / contraction member, B _S
… Barrier cuffs, B _W … Waist barrier sheet, W… Waist band, G… Gasket cuffs, SF… Side flaps, E
F ... End flap

Claims (5)

[Claims] 1. An absorber is interposed between a liquid-permeable sheet and a liquid-impermeable sheet, and barrier cuffs are formed on both sides of a paper diaper by side barrier sheets so as to project to the front side over substantially the entire length of the diaper. With a disposable diaper having an end flap portion that does not have an absorber extending outward of the absorbent body edge at the front and rear ends of a paper diaper, at least one end side of the front and rear ends of the disposable diaper,
While straddling the end flap portion and the absorber, straddling between the barrier cuffs on both sides, an elastic stretchable waist barrier sheet is disposed, and the waist portion is fixed to the waist barrier sheet and the end flap portion. A disposable diaper characterized in that a waist band is formed by the elastic force of a barrier sheet and a pocket that opens inward is formed at a non-fixed portion on the inner edge side. 2. The disposable diaper according to claim 1, wherein a material having air permeability is used as the waist barrier sheet. 3. The disposable diaper according to claim 1, wherein the front surface side of the waist barrier sheet is made hydrophilic and the surface of the back surface facing the liquid permeable sheet is made water repellent. 4. The water-repellent surfaces of both the front surface side and the back surface side of the waist barrier sheet facing the liquid-permeable sheet.
2. The disposable diaper described in 2. 5. 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.
2. The disposable diaper described in 2.