JPH11290377A - Pants-shaped disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pants-shaped disposable diaper which applies the extremely satisfactory feeling of wearing, prevents slip-down and has a leak preventing function for excretion. SOLUTION: Concerning the disposable diaper pants-shaped in advance, first and second elastic extension/contraction members 8 and 9 composed of plural elastic extension/contraction materials are respectively arranged from inside leg parts on one side of a back sheet to the side edge parts of front and back bodies 5 and 6 and at the same time, the plural elastic extension/contraction materials are arranged so as to widen the interval gradually from the areas of the inside leg parts to both the side edge parts.

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 is formed in a pants-type in advance.

[0002]

2. Description of the Related Art Conventionally, as a disposable diaper, for example, in a side flap of a flat type diaper as disclosed in Japanese Patent Application Laid-Open No. 57-77304, the portions corresponding to the right and left abdomen parts when worn are joined in advance. A so-called pants-type diaper that is fixed and provided with an opening around the waist and an opening around the leg has been proposed. In such a pants-type disposable diaper, for example,
JP-A-16920, JP-A-4-289201, JP-A-4-166150 and JP-A-4-28920
As described in No. 1, the openings around both feet,
Stretch elasticity is applied to the opening around the waist and further to both sides around the waist in order to enhance the diaper's ability to follow and fit the wearer. Such pants-type disposable diapers can be detached and worn by a wearer, and their demand is increasing even when the diapers are separated from infants or for adults such as incontinent persons.

[0003]

SUMMARY OF THE INVENTION
In a pants-type disposable diaper as described in Japanese Patent Publication No. 20, a stretchable elastic member that can be stretched and squeezed at the opening around the waist and the opening around both legs and fits the absorber to the wearer. Although the diaper has a function to prevent leakage from the opening, the waist circumference does not have elasticity, so the fit is incomplete and the diaper absorbs urine etc. during wearing. When the weight increases, the diaper slips down, a gap is formed in the opening around the leg, and leakage occurs.

Further, in the case of a pants-type disposable diaper as disclosed in Japanese Patent Application Laid-Open Nos. 4-166150 and 4-289201, it is possible to expand and contract around the entire circumference of the waist or the side of the waist. Since the diaper is constituted by disposing the elastic member, the effect of suppressing the sliding down is somewhat seen. However, since the bulging part of the wearer's belly is clamped by the elastic elastic body, traces of the elastic member are attached to the belly part, and the feeling of wearing is significantly inferior. Also, when excrement is absorbed and the weight of the absorber increases, the tightening of the swollen abdomen is very unstable, the diaper slips down to the waist below the belly, and the elastic elastic members around the legs are pulled, A gap is created between the leg opening and the periphery of the wearer's leg, causing leakage.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the conventional pants-type disposable diaper, to have a very good wearing feeling, to prevent slip-off and to prevent excrement leakage. To provide diapers for use.

[0006]

SUMMARY OF THE INVENTION The present invention provides a liquid-permeable top sheet, a liquid-impermeable back sheet, an absorber disposed between these two sheets, and an outer side from both side edges of the absorber. Side flaps extending to the front flap side and the back body side of the side flap are joined to form opposite waist openings and a pair of leg openings to form a waist opening and a pair of leg openings. A pants-type disposable diaper in which elastic members are arranged along the back sheet,
A first elastic member is arranged from a crotch region on one side of the diaper to a side edge of the front and rear body, and a second elastic member is arranged from a crotch region on the other side of the diaper to a side edge of the front and rear body. The first and second stretchable elastic members are made of a plurality of stretchable elastic materials, and are arranged such that the distance between the first and second stretchable elastic members increases from the crotch region toward the side edges of the front body and the back body. The present invention relates to a pants-type disposable diaper characterized by being made.

Further, in the present invention, the back sheet comprises a laminate of a liquid impermeable film and a nonwoven fabric,
And a pants-type disposable diaper, wherein the second elastic member is disposed between the liquid impermeable film and the nonwoven fabric.

Further, according to the present invention, the back sheet has a thickness of 2
A pants-type disposable diaper comprising a layer of nonwoven fabric and a liquid-impermeable film laminated thereon, wherein the first and second elastic members are disposed between the two layers of nonwoven fabric. About.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A pants-type disposable diaper according to the present invention comprises a back sheet, which is provided separately from a stretchable elastic member arranged along a waist opening and a leg opening.
A first elastic member is arranged from a crotch region on one side of the diaper to a side edge of the front and rear body, and a second elastic member is arranged from a crotch region on the other side of the diaper to a side edge of the front and rear body. Further, the first and second stretchable elastic members are made of a plurality of stretchable elastic materials, and the distance between the first and second stretchable elastic members is increased from the crotch region toward the side edges of the front body and the back body. Are located. With such a configuration, the pants-type disposable diaper of the present invention has an extremely good wearing feeling, prevents slippage of the diaper during wearing, and has an excellent effect of preventing excrement leakage. Things.

That is, since the first elastic member and the second elastic member are both arranged in an extended state, it is possible to impart elasticity around the waist of the pants-type diaper, and to expand and contract the opening around the waist. It is possible to prevent the diaper from falling down together with the elastic member. At this time, the first elastic member and the second elastic member are not arranged on the lower abdomen of the wearer, that is, the portion where the belly is swollen most, but are arranged from the crotch region to the waist side. Therefore, the wearer can be effectively tightened with the diaper, and a tremendous effect can be obtained in preventing slippage. In addition, by preventing slipping, the gathers around the legs are pulled downward by the weight of the diaper, which is effective in preventing a gap from being generated between the wearer's leg circumference and the diaper, thereby preventing leakage. is there. Similarly, since the first elastic member and the second elastic member are not arranged in the belly portion, the wearer does not feel a feeling of squeezing, and the trace of the elastic member is hardly attached to the belly, so that it is very comfortable. A comfortable wearing feeling is obtained.

The first elastic member and the second elastic member are preferably bundled and arranged at the crotch, respectively, so that the first elastic member and the second elastic member are arranged. Thus, sufficient elasticity is provided continuously in the waist direction.

The top sheet used in the present invention is a liquid-permeable nonwoven fabric or woven fabric made of synthetic fibers using polyester, polypropylene, polyethylene, other thermoplastic resin or the like as a raw material. Natural fibers may be used, and the fibers can be manufactured from a wide range of materials such as a combination of synthetic fibers and natural fibers. In any case, since the top sheet is a part that comes into direct contact with the skin, the top sheet may be soft and comfortable, and may be breathable. Since the central region of the top sheet is disposed on the absorber, it is preferable that the central region be made of hydrophilic fibers so that the liquid can be transmitted quickly. Further, both end regions in the vertical direction of the top sheet are preferably water-repellent so as not to seep out from the absorber that has absorbed the liquid. Also,
The top sheet does not need to be constituted by a single sheet, and may be constituted by a plurality of sheets such as a center top sheet and a side top sheet. When the top sheet is composed of a plurality of sheets, each sheet may be made of a different material, or may be made of the same material.

The back sheet used in the present invention is a liquid impermeable film such as polyethylene, a material in which a nonwoven fabric or a woven fabric is bonded to the liquid impermeable film,
Further, it is made of a nonwoven fabric or a woven fabric having a leakproof property, and is not particularly limited as long as the moisture in the absorbent does not seep out to the outside of the diaper. Further, it may be embossed in a pattern to give a cloth-like appearance, or may be further matte-finished. When a film is used, a known moisture-permeable film that is permeable to water vapor only while being impermeable may be used, and is preferable because it prevents stuffiness. Further, the material may be elastic so as to fit the wearer. Polyurethane film,
Use of a natural rubber sheet, a foamed sheet, or the like is conceivable, and a material in which an elastic nonwoven fabric or the like is bonded may be used.

The absorbent used in the present invention is formed of cotton-like pulp, a superabsorbent polymer, a hydrophilic sheet or the like, and is not particularly limited as long as it has a water absorbing property. The absorbent used in the present invention is made from known absorbent materials commonly used in conventional disposable diapers and other absorbent articles. That is, it is formed from a single-layer or multi-layer mat made of absorbent fibers such as cotton-like pulp and rayon, wrapped by a hydrophilic sheet, and a highly water-absorbing polymer is uniformly mixed in each mat. Alternatively, they are arranged in layers between the mats. In addition, the absorbent in which the superabsorbent polymer is uniformly mixed may be heat-compressed after mixing 3 to 60% by weight of the heat-fusible substance with respect to the cotton-like pulp. Only the water-absorbing polymer substance may be wrapped by the hydrophilic sheet.

As the cotton-like pulp, chemical pulp sheet,
Waste paper pulp sheet or mechanical pulp sheet is obtained by fibrillating with a crusher and has a fiber size of 5 mm or less.
Pulp materials are not limited to conifers, but include hardwoods, straws,
Bamboo and kenaf also apply. The amount of the pulp, the absorbent body of interest, for example, whether used alone, or used by stacking a plurality, varying the like or in combination with other absorbent material, typically, 50 to 400 g / m ² To be.

Examples of the superabsorbent polymer include starch, cellulose, and synthetic polymer. That is, a starch-acrylic acid (salt) graft polymer, a saponified starch-ethyl acrylate graft copolymer, a saponified starch-methyl methacrylate graft copolymer, a saponified starch-acrylonitrile graft copolymer, Saponified starch-acrylamide graft copolymer, saponified starch-acrylonitrile-2-acrylamido-2-methylpropanesulfonic acid graft copolymer, acrylic acid (salt) polymer, polyethylene oxide cross-linked with acrylic acid, A crosslinked product of sodium carboxymethylcellulose; a crosslinked product of a polyvinyl alcohol-maleic anhydride reactant;

Of these, those which absorb urine, body fluid and water at least 20 times their own weight, and those of the sodium polyacrylate type are most suitable in terms of absorption performance. The distribution amount of the superabsorbent polymer is 10 to 500 parts by weight, preferably 15 to 30 parts by weight, based on 100 parts by weight of the dried cotton-like pulp.
0 parts by weight, and such an amount of the superabsorbent polymer is substantially uniformly distributed in the cotton-like pulp. When the superabsorbent polymer absorbs water and swells, the particles have minimal interference with each other and come into continuous contact with a small permeation barrier,
It absorbs and absorbs urine and bodily fluids in three dimensions.

The shape of the absorber may be an hourglass, a rectangle, a T
There is no particular limitation on the character shape, etc., as long as the shape fits the inseam. In general, in order to improve the feeling of wearing, it is particularly preferable to have a shape in which the crotch portion is narrowed, such as an hourglass shape or a T shape.

As the elastic material forming the first and second elastic members, urethane film, urethane thread, urethane foam, thread rubber and the like are used. The number of the elastic materials used in the first elastic member and the second elastic member depends on the materials themselves, but it is preferable to use 2 to 15 each. Further, the number of stretchable elastic materials used in the first stretchable elastic member and the second stretchable elastic member may be different. Further, the first elastic member and the second elastic member can be configured by using a plurality of elastic materials having different extension stresses, and it is possible to set necessary extension stress in each part. In addition, the intervals at which the first elastic members and the second elastic members are arranged may all be the same, or all may be different, and there is no particular limitation.

The distance between the most distant elastic materials at the side edges of the front body and the back body is two minutes of the length of the side edge parts. Is preferably one or more. By arranging in this manner, the circumference of the leg is tightened and the waist side is also tightened, and the direction of tightening of the stretchable elastic material intersects both the length direction of the diaper and the width direction of the diaper, and tightens both directions. In addition, a force for lifting the diaper works when worn, and especially in the back body, the diaper is arranged so as to wrap around the buttocks. When the distance between the most distant elastic materials is less than one half of the length of the side edge, the elastic material is arranged near the opening around the leg or near the opening around the waist. As a result, only the effect of tightening only one of the leg circumference and the waist side is obtained.

As the elastic members disposed at the leg opening and the waist opening, urethane films, urethane yarns, urethane foams, thread rubbers and the like are used.

[0022]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a pants-type disposable diaper according to the present invention; however, the present invention is not limited thereto. FIG. 1 is a perspective view showing a pants-type disposable diaper according to the present invention. In FIG. 1, the pants-type disposable diaper has a front body 5 and a back body 6 having opposite side edges joined by side seams 7 to form a waist opening 1 and a pair of leg openings 2. A stretchable elastic member is arranged along each opening. further,
The front body 5 and the back body 6 include a first elastic member 8 and a second elastic member 9 made of a plurality of elastic materials from the crotch region to both side edges, respectively. It is arranged so that the interval becomes wider toward.

FIG. 2 is a developed view showing a state in which the side seam 7 of the pants-type disposable diaper of FIG. 1 is released and deployed. In FIG. 2, the pants-type disposable diaper has an absorber 10 disposed in a central region along a longitudinal direction thereof, and portions extending from both side edges of the absorber 10 are side flaps 16.
The first elastic member 8 and the second elastic member 9 are arranged from the front body to the rear body of the side flap 16. A waist opening elastic member 3 and a leg opening elastic member 4 are disposed in the waist opening 1 and the leg opening 2 of the diaper, respectively.

FIG. 3 is a sectional view showing a state in which the pants-type disposable diaper of FIG. 2 is cut along the line xx ′.
In FIG. 3, a pants-type disposable diaper includes a liquid-permeable top sheet 11 and a liquid-impermeable back sheet 12.
And an absorber 10 placed between the top sheet 11 and the back sheet 12 and side flaps 16 extending outward from side edges of the absorber 10. In this case, the back sheet 12 is composed of the liquid impermeable film 13 and the nonwoven fabric 14.
The side flaps 16 are formed by a top sheet 11 and a back sheet 12 extending outward from side edges of the absorber 10.
Further, a second stretchable elastic member 9 is disposed between the liquid impermeable film 13 forming the back sheet 12 and the nonwoven fabric 14. On the side flaps 16 at the side edges of the absorber 10, the top sheet 11 is folded to form three-dimensional gathers 17. The first and second elastic members disposed on the back sheet can be disposed on the liquid-impermeable film. However, as shown in FIG. It is preferable to dispose it in a region where good stretch elasticity can be obtained even in the region where the absorber is arranged.

FIG. 4 shows another example different from FIG. It is sectional drawing which shows the state which cut | disconnected the pants type disposable diaper of FIG. 2 along the xx 'line. In FIG. 4, the pants-type disposable diaper includes a liquid-impermeable top sheet 11, a liquid-impermeable back sheet 12, an absorber 10 disposed between the top sheet 11 and the back sheet 12, Absorber 10
And side flaps 16 extending outward from the side edges of the side flaps. In this case, the back sheet 12 is formed by laminating the liquid impermeable film 13 and the nonwoven fabric 14, but the liquid impermeable film 13 exists only in the portion where the absorber 10 is arranged, The flap 16 is formed of a nonwoven fabric 14 forming a topsheet 11 and a backsheet 12 extending outward from a side edge of the absorber 10, and the second stretchable elastic member 9 is disposed on the nonwoven fabric 14.

FIG. 5 shows another example different from FIGS. 3 and 4.
It is sectional drawing which shows the state which cut | disconnected the pants type disposable diaper of FIG. 2 along the xx 'line. In FIG. 5, the pants-type disposable diaper has a liquid-permeable top sheet 11 and
A liquid-impermeable backsheet 12, an absorber 10 disposed between the topsheet 11 and the backsheet 12, and a side flap 16 extending outward from a side edge of the absorber 10.
Consists of In this case, the back sheet 12 is formed of the two nonwoven fabrics 14 and 15 and the liquid-impermeable film 13 disposed thereon, and the backsheet 12 is formed from the side edges of the absorber 10 of the liquid-impermeable film 13. The extending portion is bonded to the top sheet 11 to form a three-dimensional gather 17, and the side flaps 16 form two nonwoven fabrics 14 forming a back sheet 12 extending outward from the side edge of the absorber 10, 15, the nonwoven fabric 14,
The second telescopic elastic member 9 is disposed between the reference numerals 15.

FIG. 6 is a plan view showing a state in which the first elastic member 8 and the second elastic member 9 are disposed on the back sheet 12 of the pants-type disposable diaper of the present invention.
In FIG. 6, a first elastic member 8 is disposed from the crotch region on one side of the back sheet 12 to the side edges of the front body 5 and the back body 6.
The second elastic member 9 is arranged from the crotch region on the other side to the side edges of the front body 5 and the back body 6. Each of the first and second elastic members 8 and 9 is formed of a plurality of thread-like elastic members, is disposed inside the diaper in a curved manner, and extends from the crotch region to the front body 5 and the rear. The body 6 is arranged so that the distance between the two sides increases toward the side edges.

FIG. 7 shows another example different from FIG. 6, in which the first elastic member 8 and the second elastic member 9 are arranged on the back sheet of the pants-type disposable diaper of the present invention. FIG. In FIG. 7, the first telescopic elastic member 8
The second elastic member 9 is cut in the crotch region, and the first elastic member 9 and the second elastic member 9 are arranged discontinuously in this region. In this way, by disposing the first and second elastic members in a discontinuous state that does not exist in the crotch portion, elasticity is not provided in the longitudinal direction of the diaper, so that a more excellent wearing feeling can be obtained. become able to.

[0029]

According to the pants-type disposable diaper of the present invention, apart from the elastic members arranged along the waist opening and the leg opening, the first elastic member made of a plurality of elastic materials is used. The stretchable elastic member and the second stretchable elastic member are respectively arranged from the crotch region on one side of the diaper to the side edges of the front and rear bodies, and are arranged so that the respective portions expand from the crotch to the side edges. Have been. By having such a configuration, the first stretchable elastic member and the second stretchable elastic member are not arranged on the lower abdomen of the wearer, that is, the portion where the belly is swollen most, and from the crotch region to the waist circumference side portion. Since they are arranged, a great effect can be obtained in preventing slip-down. At the same time, leakage caused by slippage, that is, leakage caused by a gap between the circumference of the wearer's leg and the diaper is prevented by pulling the leg-opening elastic member downward by the weight of the diaper, thereby preventing the leakage. It is also effective. Similarly, since the first elastic member and the second elastic member are not arranged in the belly portion, the elastic member is hardly traced, and the wearing feeling is good.

[0030]

[Brief description of the drawings]

FIG. 1 is a perspective view showing a pants-type disposable diaper according to the present invention.

FIG. 2 is a perspective view showing a state in which a side seam of the pants-type disposable diaper of the present invention shown in FIG. 1 is released and deployed.

FIG. 3 is a cross-sectional view showing a state in which the pants-type disposable diaper of the present invention shown in FIG. 2 is cut in a direction XX ′ perpendicular to a longitudinal direction.

4 shows an embodiment different from that of FIG. 3, and shows the pants-type disposable diaper of the present invention shown in FIG.
FIG. 4 is a cross-sectional view showing a state cut in the ´ direction.

FIG. 5 is a cross-sectional view showing another embodiment different from FIGS. 3 and 4, showing a state in which the pants-type disposable diaper of the present invention shown in FIG. 2 is cut in a direction xx ′ perpendicular to the longitudinal direction. Area view.

FIG. 6 is a plan view showing a state in which a stretchable elastic member is arranged on a back sheet of the pants-type disposable diaper of the present invention.

FIG. 7 is a plan view showing another embodiment different from FIG. 6, showing a state in which a stretchable elastic member is disposed on a back sheet of the pants-type disposable diaper of the present invention.

[Explanation of symbols]

 1. Opening around waist 2. Opening around leg 3. Elastic elastic member around waist 4. Elastic elastic member around leg 5. Front body 6. Back body 7. Side seam 8. First elastic member 9 .2nd elastic member 10. Absorber 11. Liquid permeable top sheet 12. Liquid impermeable back sheet 13. Liquid impermeable film 14. Nonwoven fabric 15. Nonwoven fabric 16. Side flap 17. Solid gather

Claims (1)

[Claims] 1. A liquid-permeable topsheet, a liquid-impermeable backsheet, an absorber disposed between the two sheets, and side flaps extending outward from both side edges of the absorber. The front flap side and the back body side of the side flaps are joined at opposite side edges to form a waist opening and a pair of leg openings, and a stretchable elastic member is arranged along the opening. A pants-type disposable diaper, wherein the back sheet is provided with a first elastic member extending from a crotch region on one side of the diaper to a side edge of the front and rear body, and a diaper on the other side. A second elastic member is disposed from the crotch region to a side edge of the front and rear body, the first and second elastic members are made of a plurality of elastic materials, and the front body and the back are formed from the crotch region. On each side edge of the body Pant disposable diaper, characterized in that it is arranged so that the spacing widens accordance buy.