JPH08182703A - Briefs type disposable diaper - Google Patents

Abstract

PURPOSE: To obtain a diaper with a limited sagging by arranging a stretchable elastic material to expand gradually to side rim parts from final end parts of the belly and rear sides of a back sheet so that the distance separated the most in the side rim part is more than half the length of the side rim part. CONSTITUTION: Elasticity is imparted to first stretching elastic members 9 and 10 attached on a back sheet having both central side parts in the longitudinal direction of an absorbing body 8 positioned near openings 2 for left and right legs, second elastic members 11 and 12 comprising a plurality of stretchable elastic materials attached on a front panel and third stretchable elastic members 13 and 14 comprising a plurality of stretchable elastic materials attached on a rear panel and stretchable elastic members 15 and 16 surrounding a waist. The second and third stretchable elastic members 11-14 are so arranged to expand in breadth to the side rim parts from final end parts of the belly side and rear side of the back sheet so that the distance separated the most at the side rim part is more than half the length of the side rim part.

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 preliminarily formed in a pants type.

[0002]

2. Description of the Related Art Conventionally, as a diaper to be used, for example, in a side flap of a flat type diaper disclosed in Japanese Patent Laid-Open No. 57-77304, a part which comes into contact with the left and right flanks in advance is worn in advance. A so-called pants-type diaper has been proposed in which the waist-opening and the leg-opening are provided by joining and fixing. Further, in such a pants-type disposable diaper, expansion and contraction elasticity is given to the openings around both legs, the openings around the waist, and both sides around the waist in order to enhance the followability and fit of the diaper to the wearer. This is described in Japanese Utility Model Laid-Open No. 3-16920, Japanese Patent Application Laid-Open No. 4-28363, Japanese Patent Application Laid-Open No. 4-166150, Japanese Patent Application Laid-Open No. 4-289201, and the like. Such a pants-type diaper can be attached and detached by a wearer, and its demand has been increasing even when the infant is leaving the diaper or for adults such as incontinence.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In a pants-type disposable diaper as described in Japanese Patent Laid-Open No. 20 and Japanese Patent Application Laid-Open No. 4-28363, a stretchable elastic member is arranged in the openings around the waist and the openings around both legs. , These elastic elastic members squeeze the opening to fit the absorber to the wearer and to prevent the diaper from leaking through the opening, but the waist side does not have elastic elasticity. Therefore, the fit is incomplete,
There is a problem that the diaper may slip off if the weight of the diaper increases by absorbing urine or the like during wearing.

Further, in the case of a pants-type diaper as described in JP-A-4-166150 and JP-A-4-289201, expansion / contraction is performed around the waist or around the waist. The elastic member is placed to improve the fit, but by placing the stretchable elastic member around the waist, the number of elements that make up the diaper increases, and the number of steps increases, so the cost required for all used articles is reduced. It may be an obstacle to achieving the purpose of mass production, and the elastic elastic member arranged in this way essentially has a function of laterally tightening around the waist of the wearer. Since the diaper is perpendicular to the direction in which the diaper is about to slip, the tightening force must be increased to obtain the effect of suppressing the slip, and therefore the wearer is not required to do so. There is a problem that there is possible to give a sense of Sako.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and has elastic elasticity in the leg openings, and at the same time, improves the fitability to the waist side portion, and at the same time, the diaper falls off while wearing. The present invention relates to a pants-type disposable diaper in which an elastic elastic member that constitutes a part of the elastic elastic member of the leg opening is arranged so that a tightening force acts in a direction that prevents

That is, the present invention comprises a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body arranged between these sheets, and both sides extending from the abdominal side and the dorsal side. A pants-type disposable diaper, which is formed by joining edges, has an opening around a waist and a pair of legs, and an elastic elastic member is arranged along the opening, the pair of legs A first stretchable elastic member provided on the back sheet, in which the longitudinal center both sides of the absorber located at the crotch portion of the pants-type diaper are located in the peripheral opening, and the first stretchable elastic member. The second sheet arranged from the vicinity of the ventral end portion of the back sheet to the respective side edge portions of the back sheet.
The stretchable elastic member and the third stretchable elastic member arranged from the vicinity of the back end portion of the first stretchable elastic member to the respective side edge portions of the backsheet are arranged, whereby the openings around both legs are formed. Stretching elasticity is given over the entire circumference,
The second stretchable elastic member and the third stretchable elastic member are each formed of at least two stretchable elastic materials, and the stretchable elastic materials are spaced at intervals between the ventral side end portion and the back side end portion of the backsheet. To the respective side edge portions, the distance between the stretchable elastic materials that are arranged so as to gradually widen and are most distant from each other at the side edge portion is ½ or more of the length of the side edge portion. The present invention relates to a pants-type disposable diaper, which is characterized by that.

The present invention also relates to a pants-type disposable diaper in which the second elastic member and / or the third elastic member are composed of a plurality of elastic materials having different tensile stresses. Further, the present invention provides that the second stretchable elastic member and / or the third stretchable elastic member has a stretchable elasticity arranged closer to the leg opening than the stretchable elastic modulus of a stretchable elastic material arranged closer to the waist opening. The present invention relates to a pants-type disposable diaper in which the elongation stress of the material is larger.

[0008]

According to the pants-type disposable diaper of the present invention, the openings around the pair of legs of the diaper, the openings around the waist,
Elastic elasticity is given to a part around the waist, giving an excellent wearing feeling. And, especially on the side part around the waist, a plurality of elastic members arranged in a part around the leg are gradually spread as they reach the side edge part of the diaper along the opening part around the leg part. It is arranged in the direction of tightening around the legs as well as around the waist, and the direction of tightening of this elastic elastic member intersects both the length direction of the diaper and the width direction of the diaper and tightens both directions. The diaper has a small amount of slippage because it is working and the force to lift the diaper is exerted when it is worn.

Further, the underpants type disposable diaper of the present invention is arranged in a part of the circumference of the leg so as to gradually widen toward the side edge of the diaper along the opening around the leg. Since the stretchable elastic material consisting of multiple pieces is composed of stretchable elastic materials with different stretching stresses, it is possible to arrange stretchable elastic members with different stretching stresses depending on the location, mainly depending on the purpose and effect of tightening. It is possible.

Further, in the pants-type disposable diaper of the present invention, the distance between the stretchable elastic materials which are most distant from each other at the side edges of the front and rear bodies is not less than half the length of the side edges. It is necessary for arranging the stretchable elastic materials so that one set of stretchable elastic members has a function of tightening around the legs and also tightening the waist side portion, and the distance between the stretchable elastic materials that is most separated is the length of the side edge portion. If the elastic elastic member is placed closer to the leg opening or closer to the waist opening, if the elastic elastic member is less than ½ of the length, only one of the leg and the waist side is placed. Only tightening effect can be obtained. In addition, whether the elastic material is placed near the leg opening or at the waist opening on the side edges of the front and rear body of the diaper, whether it is the leg opening or the waist opening, It is possible to tighten both of the parts, and a part of the elastic elastic material may intersect the elastic elastic member arranged around the waist at the side edge portion of the diaper.

Further, the pants-type disposable diaper of the present invention is arranged in a part around the legs so that the distance between the legs gradually increases toward the side edges of the diaper along the leg openings. The plurality of stretchable elastic materials, since the stretchable elastic material arranged on the leg opening side is larger in stretching stress than the stretchable elastic material arranged on the waist opening side,
The stretchable elastic material placed on the opening side around the leg and having a large extension stress mainly has an action of tightening a part around the leg, and the stretchable elastic material placed on the opening side around the waist is mainly around the waist side. It is possible to act with a proper tightening force in the direction to prevent the diaper from slipping off.

Further, in the pants-type disposable diaper of the present invention, the tightening force on the entire circumference around the legs is the tightening force of the elastic elastic members arranged on both sides in the longitudinal center of the absorber located at the crotch of the diaper. And the tightening force of the elastic elastic member that also functions as the tightening effect of the waist circumference side part arranged in the rest of the leg area works without interruption, so it has good fit around the leg and does not leak. It is possible to prevent

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings showing the embodiments of the present invention. FIG. 1 is a perspective view of a pants-type disposable diaper according to an embodiment of the present invention. The underpants type disposable diaper 1 of the present invention shown in FIG. 1 has leg openings 2 and waist openings 3, and a front body 4 extending between the left and right leg openings 4 is formed. The rear body 5 is adhesively closed by side seams 6. The side seam 6 is adhesively closed by overlapping the front body 4 and the back body 5 and protruding both side edges outward, or both side edges protruding inward, or one side edge outside and the other side edge out. In a state of protruding inward, hot melt adhesive, pressure melting, ultrasonic wave melting, etc. are used alone or in combination along the outermost portions of both side edges for joining.

FIG. 2 is a perspective view showing a stretched state in which the side seam 6 of the pants-type diaper 1 of the present invention shown in FIG. 1 is opened and expanded. When the side seam 6 is worn in the state shown in FIG. The joined side portions are respectively shown as side flaps 7 by being opened and deployed, and are provided on the back seat where the longitudinal center portions on both sides of the absorber 8 are located in the vicinity of the left and right leg opening portions 2. First elastic members 9 and 10 provided therein, second elastic members 11 and 12 made of a plurality of elastic materials provided on the front body 4, and a plurality of elastic materials provided on the rear body 5. Stretching elasticity is imparted by the third stretching elastic members 13, 14 made of, and stretching elasticity is imparted by the waist stretching elastic members 15, 16 in the vicinity of the waist opening.

3 to 5 are plan views of the underpants type disposable diaper of the present invention as viewed from the liquid permeable top sheet side. The first elastic members 9, 10 and the second elastic member in FIG.
Elastic elastic members 11, 12 and third elastic elastic members 13, 1
4 shows an example of the arrangement of No. 4. In each
Each of the second elastic members 11 and 12 is composed of a plurality of thread-shaped elastic elastic materials, and mainly includes the second elastic elastic materials 21 and 22 that act to tighten the openings around the legs of the front body and the waist of the front body. 2B elastic material 2 that acts to tighten the side
3, 24, and the third elastic members 13, 14
3A elastic elastic materials 25 and 26, which mainly consist of a plurality of thread-like elastic elastic materials, which mainly act to tighten the leg openings of the rear body, and a third elastic elastic material which mainly act to tighten the waist side parts of the rear body. It is composed of 3B elastic materials 27 and 28.

In the pants-type disposable diaper of the present invention, the second elastic member and / or the third elastic member can be composed of a plurality of elastic materials having different tensile stresses. 2A stretchable elastic material 21, 22 and second
The B stretchable elastic materials 23 and 24 can be set to have stretchable elastic materials having different stretching stresses at required stretch stresses in a part around the leg and the waist side portion respectively. The same applies to Nos. 25 and 26 and the third B elastic material 27, 28. Therefore, in the pants-type disposable diaper of the present invention, the extension stress of the second A elastic elastic materials 21, 22 is reduced to the second B elastic elastic materials 23, 2.
It is possible to make it larger than the extension stress of No. 4, and the second A elastic material 21, 22 mainly tightens a part around the leg to give a fit property of the leg opening and prevents leakage from the opening. In addition, the second elastic B elastic material can act mainly on the waist side in a direction to prevent the diaper from slipping off with an appropriate tightening force without giving the wearer an excessive feeling of pressure. The same applies to the 3A stretchable elastic materials 25 and 26 and the 3B stretchable elastic materials 27 and 28.

As the liquid-permeable surface sheet used for the pants-type diaper of the present invention, a liquid-permeable nonwoven fabric made of synthetic fibers made of polyethylene, polypropylene, polyester or other thermoplastic resin is used as a back sheet. Is a liquid-impermeable polyethylene sheet, preferably a polyethylene sheet having micropores, a moisture-permeable liquid-impermeable sheet obtained by adding a filler to a thermoplastic resin, and stretching. More comfortable to run out.

Further, the elastic elastic member forming the waist opening, leg opening and / or waist side is the elastic elastic body such as urethane thread, rubber thread, etc. used for normal diapers. These stretchable elastic members are arranged in the leg openings, waist openings, front body upper part, and the like in an expanded state, and are bonded and fixed to a predetermined area by a hot melt adhesive.

The absorbent is preferably made of fluff pulp as a main material in combination with a superabsorbent polymer, and other absorbent paper may be used alone, or a mixture or laminate of heat-sealing fibers.
Further, it is preferable to have a laminated structure in which the whole is wrapped with tissue, and the shape of the absorber may be an hourglass type or a rectangular type, but the hourglass type can obtain a better fit property.

[0020]

EFFECTS OF THE INVENTION According to the pants-type disposable diaper of the present invention, the elastic elasticity is imparted to the openings around both legs of the diaper, the openings around the waist, and a part around the waist to provide an excellent wearing feeling. In particular, on the side part around the waist, there are elastic elastic members made of a plurality of elastic materials arranged in a part around the leg, and the side edges of the diaper along the opening around the leg. The stretchable elastic materials are arranged such that the distance between the stretchable elastic materials gradually increases as they reach the portion, and the distance between the stretchable elastic materials that are most distant from each other at the side edges is at least half the length of the side edges. Therefore, as well as tightening around the legs as well as around the waist, the direction of tightening of this elastic elastic member intersects both the length direction of the diaper and the width direction of the diaper and acts in the direction to tighten both directions. , The force to lift the diaper when worn The diaper is less slip down to work.

Further, the pants-type disposable diaper of the present invention is arranged in a part of the circumference of the leg so as to gradually widen toward the side edge of the diaper along the opening around the leg. Stretch elastic members made of multiple stretch elastic materials are made of stretch elastic materials with different stretching stresses. Therefore, stretch elastic members with different stretching stresses are mainly arranged depending on the placement location depending on the purpose and effect of tightening. It is possible to

Further, the pants type disposable diaper according to the present invention is arranged in a part around the legs so that the distance between the legs gradually extends toward the side edges of the diaper along the leg openings. A stretchable elastic member composed of a plurality of stretchable elastic materials has a stretching stress larger than that of the stretchable elastic material arranged on the side of the opening around the leg and larger than that of the stretchable elastic material arranged on the side of the opening around the waist. The stretchable elastic material placed on the side of the peripheral opening and having a large elongation stress mainly has the effect of tightening a part around the leg, and the stretchable elastic material placed on the side of the waist opening around the waist mainly supports the waist. It is possible to act in a direction to prevent the diaper from slipping off with an appropriate tightening force.

Further, in the pants-type disposable diaper of the present invention, the tightening force on the entire circumference around the legs is such that the elastic elastic members arranged on the back sheet on both sides in the longitudinal center of the absorber located at the crotch portion of the diaper. Since the tightening force of the elastic elastic member that also combines the tightening force of and the tightening effect of the waist side part located in the remaining part around the leg works seamlessly, a good fit around the leg is achieved. It is possible to prevent leakage.

[Brief description of drawings]

FIG. 1 is a perspective view of a pants-type disposable diaper of the present invention.

FIG. 2 is a perspective view showing a state in which side seams of the pants-type diaper shown in FIG. 1 are opened.

FIG. 3 is a plan view of the diaper showing an example of the arrangement of elastic members around the legs of the pants-type diaper of the present invention, as viewed from the liquid-permeable topsheet side.

FIG. 4 is a plan view of a diaper as seen from the liquid-permeable topsheet side, showing another example of the arrangement of the elastic members around the legs of the pants-type disposable diaper of the present invention.

FIG. 5 is a plan view of the diaper showing another example of the arrangement of the elastic members around the legs of the pants-type disposable diaper of the present invention, as viewed from the liquid-permeable topsheet side.

[Explanation of symbols] 1: Pants-type disposable diaper 2: Opening around leg 3: Opening around waist 4: Front body 5: Back body 6: Side seams 7: Side flaps 8: Absorbers 9, 10: No. 1 Stretchable elastic member 11, 12: 2nd stretchable elastic member 13, 14: 3rd stretchable elastic member 15, 16: Waist circumference stretchable elastic member 21, 22: 2A stretchable elastic material 23, 24: 2B stretchable elastic material 25 , 26: 3A stretchable elastic material 27, 28: 3B stretchable elastic material

Claims (3)

[Claims] 1. A liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between these sheets, and both side edges extending from the abdominal side and the dorsal side. A pants-type disposable diaper that is formed by joining and has an opening around a waist and a pair of legs, and an elastic elastic member is arranged along the opening, wherein the pair of legs around the opening Include a first elastic member provided on the back sheet on both sides in the center in the longitudinal direction of the absorber located in the crotch part of the pants-type diaper, and a ventral end portion of the first elastic member. A second stretchable elastic member arranged from the vicinity to each side edge portion of the backsheet, and a second stretchable elastic member arranged from the vicinity of the back end portion of the first stretchable elastic member to each side edge portion of the backsheet. And a third elastic member that has been stretched Stretching elasticity is imparted over the entire circumference of the openings around both legs, and the second stretchable elastic member and the third stretchable elastic member are each formed of at least two stretchable elastic materials. , The stretchable elastic material which is arranged so that its interval gradually widens from the abdominal end portion and the back end portion of the back sheet to the respective side edge portions, and is separated most at the side edge portions. A pants-type disposable diaper characterized in that the distance between them is at least half the length of the side edges. 2. The pants-type use according to claim 1, wherein the second elastic elastic member and / or the third elastic elastic member is configured by using a plurality of elastic elastic materials having different tensile stresses. Diaper. 3. The second elastic member and / or the third elastic member has a stretch elasticity arranged closer to the leg opening than a stretch elastic modulus of a stretch elastic material arranged closer to the waist opening. The pants-type disposable diaper according to claim 1 or 2, wherein the material has a larger tensile stress.