JPH1136103A - Pants type diaper - Google Patents

Abstract

(57) [Problem] To provide a pants-type disposable diaper having an extremely good wearing feeling and a function of preventing excrement leakage without lowering absorption capacity. SOLUTION: A first stretchable elastic member and a second stretchable elastic member each composed of a plurality of stretchable elastic materials are arranged on a front body and a back body of the exterior member, respectively. The elastic members each extend from one side edge of the front and rear body to the other side edge via the crotch, at least a part of which is arranged along a pair of leg openings, and further in the crotch. Pants-type disposable diapers arranged at regular intervals.

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 Laid-Open Publication No. Sho 57-77304, portions corresponding to left and right side abdominal 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. Although the diaper is configured by disposing the elastic member, the effect of suppressing slippage is somewhat seen, but the absorber with increased weight hangs down and the elastic member around the leg is pulled down, and the leg around A gap is created between the opening and around the wearer's leg, causing leakage.

[0005] An object of the present invention is to solve the above-mentioned problems and to arrange a plurality of elastic elastic members at intervals in the crotch, so that an extremely good feeling of wearing and excrement can be obtained without lowering the absorption capacity. Another object of the present invention is to provide a pants-type disposable diaper having a leakage preventing function.

[0006]

The present invention includes the following inventions to solve the above-mentioned problems. (1) A liquid-permeable top sheet, a liquid-impermeable back sheet, an absorbent body composed of an absorber disposed between these two sheets, and the absorbent body are joined, and the absorbent body is absorbed by the wearer. An exterior member that holds and holds the main body. The opposite side edges of the front body and the rear body of the exterior member are joined to form a waist opening and a pair of leg openings, and along the opening. In the pants-type disposable diaper in which the elastic members are arranged, on the front body side of the exterior member, a plurality of elastic materials extending from one side edge to the other side edge via the crotch portion. A first stretchable elastic member is disposed, at least a part of which is disposed along the opening around the leg, and a rear body side of the exterior member is formed from one side edge through the crotch to the other side. It is made of multiple stretchable elastic materials that reach the side edges. Is disposed second stretchable elastic members, pant disposable diaper, wherein at least a portion of which is disposed along the leg opening.

(2) The exterior member is formed of an outer layer sheet located outside the diaper and an inner layer sheet located inside the diaper, and the first elastic member and the second elastic member are formed of an outer sheet. The pants-type disposable diaper according to the above (1), which is disposed between the inner layer sheets.

(3) The first telescopic elastic member and the second telescopic elastic member are arranged so that their intervals gradually widen from the respective side edges of the front and rear bodies toward the crotch part. The pants-type disposable diaper according to (1) or (2) above.

(4) The first elastic member and the second elastic member are arranged so that the distance between them becomes narrower from the side edges of the front and rear bodies toward the crotch portion and then spread again at the crotch portion. The pants-type disposable diaper according to the above (1) or (2), wherein

(5) The first telescopic elastic member and the second telescopic elastic member are arranged such that the distance between the most distant elastic materials at the side edges of the front body and / or the rear body is equal to the length of the side edge part. (4) characterized in that it is at least one half.
Pants-type diapers.

(6) The first stretchable elastic member and the second stretchable elastic member are arranged at an interval of 3 to 30 mm in a crotch part, in any one of the above (1) to (5). The pants-type disposable diaper described.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION A pants-type disposable diaper according to the present invention comprises an absorbent body for absorbing excrement, and an exterior member for holding the absorbent body against a wearer. A first elastic member and a second elastic member made of a plurality of elastic materials extending from one side edge to the other side edge via the crotch portion are arranged on the front side and the back body side, respectively. , At least a part of which is arranged along the leg opening. By adopting such a configuration, the pants-type disposable diaper of the present invention has a good feeling of wearing without reducing the absorption capacity, and prevents excrement from leaking from the leg opening. It is.

In this case, the first and second elastic members are
The gap may be arranged so as to increase from the side edge toward the crotch, or may be arranged so as to decrease the gap.
Preferably, they are arranged at intervals of m. By arranging at such intervals, it is possible to prevent the absorbent body that has absorbed the excrement from swelling in the crotch portion, thereby preventing the fitting property from being deteriorated. Excrement can be prevented from leaking out from the gap created between the legs.

As the surface sheet used in the present invention, a liquid-permeable nonwoven fabric or woven fabric composed of synthetic fibers using polyethylene, polypropylene, polyester, other thermoplastic resin or the like as a raw material is used. 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 topsheet is a portion that comes into direct contact with the skin, it is only necessary that the topsheet is soft and comfortable, and it is sufficient that the topsheet is breathable. Since the central region of the topsheet 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 longitudinal direction of the topsheet are preferably water-repellent so that they do not seep out from the absorber that has absorbed the liquid. Further, the topsheet does not need to be composed of a single sheet, but may be composed of a plurality of sheets such as a central topsheet and a side topsheet. 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 comprises:
Liquid impermeable film such as polyethylene, a material in which a nonwoven fabric or a woven fabric is bonded to a liquid impermeable film,
It is made of a non-woven fabric, woven fabric or the like having a leak-proof property, and is not particularly limited as long as the moisture in the absorbent does not exude 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 allows only water vapor to pass therethrough while being liquid-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,
A natural rubber sheet, a foamed sheet, or the like can be used, and further, a material in which an elastic nonwoven fabric or the like is attached 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,
It has a fiber length of 5 mm or less obtained by defibrating a waste paper pulp sheet or a mechanical pulp sheet with a crusher.
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 product of a starch-ethyl acrylate graft copolymer, a saponified product of a starch-methyl methacrylate graft copolymer, a saponified product of a 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;

Among these superabsorbent polymer substances, those which absorb urine, body fluid and water at least 20 times their own weight, and sodium polyacrylate are most suitable from the viewpoint of absorption performance. The amount of the superabsorbent polymer used is 10 to 500 parts by weight with respect to 100 parts by weight of the dried cotton-like pulp.
It is preferably 15 to 300 parts by weight, and such an amount of the superabsorbent polymer is substantially uniformly distributed in the cotton-like pulp. When the superabsorbent polymer material absorbs water and swells, the particles have minimal interference with each other, continuously contact and have a small permeation barrier, and permeate and absorb urine and body fluid in three-dimensional directions.

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.

The stretchable elastic member is arranged in an extended state around the opening around the leg, the opening around the waist, and the like, and is adhered and fixed with a hot melt adhesive. As the stretchable elastic member, a urethane film, urethane, urethane foam, thread rubber, or the like is used.

In the present invention, as the outer layer sheet and the inner layer sheet forming the exterior member, a non-woven fabric, a woven fabric, or a film of polyethylene, polyurethane or the like made of a thermoplastic resin such as polyethylene, polypropylene or polyester can be used. It is preferable to use a nonwoven fabric from the viewpoints of touch to the wearer, air permeability, and the like.

[0023]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a disposable diaper according to the present invention, but the present invention is not limited thereto. FIG. 1 is a perspective view of a pants-type disposable diaper according to the present invention. FIG. 2 is a perspective view of the pants-type disposable diaper of the present invention shown in FIG. FIG. 3 shows FIG.
1 is a cross-sectional view of the pants-type disposable diaper of the present invention shown in FIG. FIG. 4 is a plan view showing a state in which a stretchable elastic member is arranged on an exterior member of the pants-type disposable diaper of the present invention. FIG. 5 is a plan view showing another example different from FIG. 4 and showing a state in which a stretchable elastic member is arranged on an exterior member of the pants-type disposable diaper of the present invention.

Reference numeral 1 denotes an opening around the waist, 2 denotes an opening around the leg, 3 denotes a front body, 4 denotes a back body, 5 denotes a side seam, 6 denotes a first elastic member, and 7 denotes a second elastic member. ,
8 is an elastic member around the waist opening, 9 is an elastic member around the waist, 10 is an absorber, 11 is a liquid-permeable topsheet, 12 is a liquid-impermeable backsheet, 13 is an absorbent body, and 14 is an exterior member. , 15 indicate an outer layer sheet, and 16 indicates an inner layer sheet.

As shown in FIG. 1, the disposable diaper according to the present invention has an opening 1 around the waist and an opening 2 around the leg. A first elastic member 6 and a second elastic member 7 are arranged in the leg opening 2 so that the leg opening has elasticity. A waist elastic member 9 is also arranged around the waist. Further, both side edges of the front body 3 and the back body 4 extending from the left and right leg openings 2 are adhesively closed by side seams 5.

The side seam 5 is adhered and closed by overlapping the front body 3 and the back body 4 via the crotch portion so that the absorber 10 is on the inside, and protruding both side edges outward, or both side edges inside. In the state of protruding, or one side edge is outside, the other side edge is protruding inward, hot melt adhesive, pressure melting, ultrasonic melting etc. alone or along the outermost of both sides It is joined by combining.

FIG. 2 is a perspective view showing an extended state in which the side seam 5 of the pants-type disposable diaper of the present invention shown in FIG. 1 is released and expanded. The first stretchable elastic member 6 made of a plurality of stretchable elastic materials provided on the front body 3 of 14 and the second stretchable elastic member 7 made of the plurality of stretchable elastic materials provided on the backbody 4 provide stretchable elasticity. Has been granted. In the vicinity of the waist opening 1, elasticity is provided by a waist opening elastic member 8. Furthermore, a waist elastic member 9 may be arranged around the waist of the front body 3 and the back body 4 as needed. It is preferable to dispose the elastic members not only around the waist but also around the waist, since a great effect can be obtained in preventing the diaper from slipping down.

FIG. 3 is a cross-sectional view showing the pants-type disposable diaper of the present invention cut along the line XX ′ in FIG. 2. The absorbent body 10 includes a liquid-permeable top sheet 11 and a liquid-permeable top sheet. It is arranged between the transparent back sheet 12 and forms the absorbent main body 13. Further, the exterior member 14 is formed from an outer layer sheet 15 and an inner layer sheet 16 laminated on the inner surface thereof, and the second elastic member 7 is disposed between the outer layer sheet 15 and the inner layer sheet 16.

In the present invention, the first and second elastic members can be arranged on the outer surface or the inner surface of the exterior member made of a single-layer sheet. However, as shown in FIG. By arranging between the sheets, good stretch elasticity can be maintained irrespective of the bonding state between the absorbent main body and the exterior member, and good fit can be imparted when a diaper is worn, which is preferable. .

FIG. 4 is a plan view showing a state in which a stretchable elastic member is arranged on an exterior member of the pants-type disposable diaper of the present invention. In FIG. 4, the first elastic member 6, the second elastic member 7, the waist opening elastic member 8 and the waist elastic member 9 are each composed of a plurality of thread-like elastic materials. Absorbent body 1 due to elasticity
3 has the function of constantly adhering to the wearer.

The first elastic member 6 is located on the front body 3 and is extended from one side edge through the crotch to the other side edge, at least a part of which is a pair of first and second elastic members. Arranged along the leg opening 2, the gathers are formed in the leg opening 2 of the front body 3. Also,
The second stretchable elastic member 7 is located on the back body 4 side, is arranged in an extended state from one side edge to the other side edge via the crotch, and at least a part of the second stretchable elastic member 7 is provided around the pair of legs. Gathering is formed along the opening 2 and is formed in the leg opening 2 on the side of the back body 4. Thus, the first
The stretchable elastic member 6 and the second stretchable elastic member 7 dispose the stretchable elastic member over the entire circumference of the leg opening, and gathers are formed around the entire circumference of the leg opening to improve the fit around the leg. It is effective in preventing leakage from around the wearer's leg and the diaper.

In FIG. 4, the first elastic member 6 and the second elastic member 7 are spaced from each other by a front body 3 and a rear body 4.
Are arranged so as to gradually spread from both side edges to the crotch. At this time, the contraction force of the first telescopic elastic member 6 and the second telescopic elastic member 7 arranged along the leg peripheral opening from the side edge part is necessary to the extent that the leg gathers fit around the leg. . Further, the first elastic member 6 and the second elastic member 7 arranged at the crotch part
The contraction force of the suffices only to be enough to prevent the absorbent body 13 after absorbing the excrement from slipping down. Therefore, the first elastic member 6 and the second elastic member 7 are made of elastic materials having different elongation stresses, so that the first elongation elastic member 6 and the second elongation elastic member 7 mainly have the elongation stress depending on the purpose and effect of the tightening or the arrangement location. It is also possible to arrange different elastic materials.

In the crotch portion, the first elastic member 6 and the second elastic member 7 are arranged in parallel in the lateral direction at an interval. Further, the first elastic member 6 and the second elastic member 7 may be arranged so as to cross each other, but may be arranged without crossing each other. With this arrangement, unlike the case of arranging a plurality of bundles or the case of arranging only one elastic body, the absorbent main body 13 in the crotch part is strongly tightened at a part to reduce the absorption capacity. Therefore, it is possible to hold the absorbent article in a wide area with an appropriate contraction force. That is, by arranging the first elastic member 6 and the second elastic member 7 in the crotch part, the absorbent body 13 can be arranged without reducing the absorption capacity.
In addition to suppressing the swelling, the fit is improved, and the weight around the leg 13 is pulled downward by the weight of the absorbent main body 13 to create a gap between the wearer's leg circumference and the diaper, thereby preventing leakage from occurring. .

First elastic member 6 and second elastic member 7
Although the number of stretchable elastic materials used in the above method depends on the material itself, it is preferable to use a plurality of them, for example, up to about 15 in each case. Further, the number of stretchable elastic materials used in the first stretchable elastic member 6 and the second stretchable elastic member 7 may be different.

The first elastic member 6 and the second elastic member 7 are preferably arranged at intervals of 3 to 30 mm in the crotch part. When the interval is less than 3 mm,
Since the arrangement of the first elastic member 6 and the second elastic member 7 becomes dense and the expansion and contraction becomes extremely strong, the diaper shrinks after use and the wearing feeling is significantly reduced. Conversely, if it exceeds 30 mm, the number of pieces that can be arranged on the crotch is limited, and the arrangement of the elastic members is coarse, so that not only the elasticity required for wearing is not obtained, but also the absorbent main body 13 of the crotch is insufficient. It cannot prevent swelling and slipping. All of the above intervals may be equal intervals, or all may be different intervals, and there is no particular limitation.

In the pants-type diaper in which the elastic members are arranged as described above, the gathers around the leg are formed in the opening 2 around the leg, which is effective in improving the fit and preventing leakage from between the wearer's leg and the diaper. It is a target. In addition, since a plurality of the absorbent bodies 13 are arranged at regular intervals in the crotch part, the absorbent body 13 that has absorbed the excrement is suppressed from expanding and the fit is improved. Is pulled downward, which is effective in preventing a leak from occurring due to a gap between the wearer's leg circumference and the diaper.

As shown in FIG. 5, the distance between the first elastic member 6 and the second elastic member 7 is gradually increased from the side edges of the front body 3 and the rear body 4 toward the crotch. It may be arranged so as to become narrower and spread again at the crotch. By arranging in this way,
The elasticity of the elastic material disposed on the side edge exerts a force for tightening the waist side, so that it is effective in preventing the diaper from falling down and improving the fit. Also,
In particular, in the back body 4, since it is arranged so as to wrap around the buttocks, a pants-type disposable diaper with less slippage can be obtained.

At this time, the stretchable elastic material forming the first stretchable elastic member 6 and the second stretchable elastic member 7 is the distance between the most distant stretchable elastic materials at the side edges of the front body 3 and the back body 4, that is, It is preferable that the distance between the elastic material disposed closest to the opening around the leg and the elastic material disposed closest to the opening around the waist is at least half the length of the side edge. . With this arrangement, the leg circumference is tightened and the waist side is also tightened.The direction of tightening of the elastic member crosses both the length direction of the diaper and the width direction of the diaper, and is in the direction of tightening both. Working, a force to lift the diaper works when worn, and especially in the back body 4, since it is arranged so as to wrap around the buttocks, a pants-type disposable diaper with less slippage can be obtained.

[0039]

According to the pants-type disposable diaper of the present invention, the first elastic member and the second elastic member are made of a plurality of elastic materials, and each of the front and rear bodies has one side edge from the crotch part. Through the other side edge, at least a part of which is arranged along the pair of leg openings, and furthermore, is arranged at regular intervals in the crotch, so that the first elastic member and the second Gathering around the leg is formed by the elastic member to prevent leakage and improve fit. In addition, it prevents the absorbent body that has absorbed excrement from swelling and the fit
This prevents the diaper from slipping down due to the weight of the absorbent main body to form a gap between the wearer's legs and the periphery of the wearer, thereby preventing leakage from occurring. In addition, the space between the first elastic member and the second elastic member is narrowed once from the side edges of the front and rear bodies toward the crotch portion, and is again arranged so as to expand at the crotch portion. In addition to the tightening of the part, the force to tighten the waist side also occurs, so the diaper slips down, creating a gap between the wearer's leg circumference and the diaper and preventing leakage more effectively. is there.

[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 an expanded state in which the 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 along line XX ′.

FIG. 4 is a plan view showing a state in which a stretchable elastic member is arranged on an exterior member of the pants-type disposable diaper of the present invention.

FIG. 5 is a plan view showing an example different from FIG. 4, showing a state in which a stretchable elastic member is arranged on an outer member of the pants-type disposable diaper of the present invention.

[Explanation of symbols]

 1. Opening around waist 2. Opening around the leg 3. Front body 4. Back body 5. Side seam 6. First elastic member 7. Second elastic member 8. 8. Elastic elastic member around waist opening 9. Elastic elastic member around waist Absorber 11. Liquid permeable topsheet 12. Liquid-impermeable back sheet 13. Absorbent body 14. Exterior member 15. Outer layer sheet 16. Inner layer sheet

Claims (6)

[Claims] 1. A liquid-permeable top sheet, a liquid-impermeable back sheet, an absorbent body comprising an absorber disposed between these two sheets, and the absorbent body are joined, and An exterior member for holding the absorbent body against the body, joining opposite side edges of a front body and a rear body of the exterior member to form a waist opening and a pair of leg openings, In the pants-type disposable diaper in which the elastic member is disposed along, a plurality of elastic members extending from one side edge to the other side edge through the crotch portion on the front body side of the exterior member. A first elastic member made of a material is arranged, at least a part of which is arranged along the leg-surrounding opening, and a rear body side of the exterior member passes through a crotch from one side edge. Multiple stretch elastics to the other side edge Second stretchable elastic members made of is arranged pant disposable diaper, wherein at least a portion of which is disposed along the leg opening. 2. The exterior member is formed of an outer layer sheet located outside the diaper and an inner layer sheet located inside the diaper, wherein the first elastic member and the second elastic member are an outer layer and an inner layer. The pants-type disposable diaper according to claim 1, wherein the pants-type disposable diaper is disposed between the sheets. 3. The first stretchable elastic member and the second stretchable elastic member are arranged so that the distance between the first stretchable elastic member and the second stretchable elastic member gradually increases from each side edge of the front and rear body toward the crotch. The pants-type disposable diaper according to claim 1 or 2. 4. The first telescopic elastic member and the second telescopic elastic member are arranged so that the distance between them becomes narrower from the side edge of the front and rear body toward the crotch part and then spread again at the crotch part. The pants-type disposable diaper according to claim 1 or 2, wherein: 5. The first stretchable elastic member and the second stretchable elastic member, wherein a distance between the most distant stretchable elastic materials at a side edge of a front body and / or a back body is two times the length of the side edge. The pants-type disposable diaper according to claim 4, wherein the diaper is at least one-half. 6. The underpants type according to claim 1, wherein the first elastic member and the second elastic member are arranged at an interval of 3 to 30 mm in a crotch part. Use diapers.