JPH04122257A - Disposable habiliments - Google Patents

Abstract

PURPOSE:To cause a change in the lengthwise disposition intervals of elastic members comprising a plurality of components at each enclosure of both legs by making the intervals maximum at the lengthwise center portions of the elastic members, and gradually reducing the intervals from the center portions toward either end portions. CONSTITUTION:The disposition intervals of a plurality of continuous elastic members 4 passed and supported through the guide holes of each insertion and support section of the first and second traverses, are so determined as to keep the same intervals as the guide holes, when each insertion and support section is located at a start position P1. In this state a part of each continuous elastic member 4 is bonded to adhesive's areas 14. According to the shift of each insertion and support section from the start position P1 to a return position P2, the disposition intervals of the members 4 gradually become smaller. In this state, a part of each bonded continuous elastic member 14 is bonded to the adhesive's areas 14. Also, the elongation rate of each continuous elastic member 4 slightly increases, according to the shift thereof from the start position P1 to the return position P2. As a result, the elongation rate of each continuous elastic member 4 becomes smallest at a portion 4a, and gradually increases in a direction from the portion 4a to another portion 4b.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to disposable wearing articles, and more particularly, to
Concerning disposable wear items such as diapers, incontinence pants, and training pants.

[Conventional technology and its issues]

Conventionally, this type of wearing article has an elastic member attached to its leg area. Generally, the elastic member is a stretched elastic member fixed to at least one of a towel and a hack sheet using an adhesive.

Depending on the product, for example, in the case of disposable diapers, regardless of whether the wearer is male or female, generally the lower part of the diaper's leg area, i.e. , Excretory fluid tends to leak from both sides of the crotch area.

Therefore, it is preferable that the diaper is configured such that the compression area by the bony member in the lower part of the leg circumference is wider than in other parts of the leg circumference.

However, in diapers that have been proposed and put into practical use, no consideration has been given to changing the arrangement interval in the longitudinal direction of the plurality of elastic members.

The present invention aims to adjust the spacing between the plurality of elastic members in each of the leg surroundings in the length direction in order to maintain the good wearing condition of the article and prevent the leakage of excrement fluid. The challenge is to provide products that have been changed.

(Means for Solving the Problems) The present invention for solving the above-mentioned problems provides a plurality of leg surrounds formed in an arc shape on both sides of the crotch area located between the front and rear areas of the top sheet and the back sheet. The object is a disposable wearing article in which an elastic member consisting of a book is attached respectively.

In the present invention related to the above-mentioned object, the arrangement interval of the plurality of elastic members in each of the leg rotation parts is made widest at a central portion in the length direction of the elastic member, and gradually narrows from the central portion to both end portions thereof. It is characterized by what it did.

[Action and effect]

In the article according to the present invention having the above configuration, the arrangement interval of the plurality of elastic members in each of the leg surroundings is set at the longitudinal center of the elastic member, that is, at the center of both sides of the crotch area of the article. Since it is the widest part of the wearer's skin, it applies pressure to the wearer's skin in the widest area at the center of both sides of the crotch area. For this reason, the compressive force is widely dispersed in the central region on both sides of the crotch area, which does not cause pain to the wearer, and also makes it difficult for excretory fluid to leak from the edges on both sides of the crotch area of the article.

〔Example〕

Embodiments of the wearing article according to the present invention will be described below with reference to the drawings.

FIG. 1 shows a perspective view of a wearing article 1. FIG. The article 1 has a leg surrounding section 2 and a waist surrounding section 3, each having elastic members 4 and 5.
It is installed.

FIG. 2 shows an exploded perspective view of article l. Article 1 includes a vertically and horizontally stretchable, water-permeable top sheet 6, a vertically and horizontally stretchable, water-impermeable hack sheet 7, and a mat or sheet-like water absorbent core 8.
and elastic members 4 and 5 for the leg surroundings and waist surroundings. Arc-shaped recessed edges 13, which are the leg surroundings 2, are formed on both side edges of the crotch area 12 located between the front and rear areas 10.11 of the top and back sheets 6.7. The elastic member 4 for the leg surrounding area is composed of a plurality of thread-like elastic materials, and is applied to the inner surface of the back sheet along the shape of the concave notch edge 13 of the hack sheet 7 while being stretched at a given magnification. It is fixed to the hot melt adhesive area 14. The elastic member 5 for the waist surrounding area is made of a tape-like elastic material, and is made of hot melt applied to the inner surface of the back sheet along each edge of the front and rear regions 10 and 11 of the hack sheet 7, which is the waist surrounding area 3. They are secured along each of their edges with a hot melt adhesive (not shown) applied to a mold adhesive area (not shown) or to the elastic member 5 itself.

FIG. 3 is a plan view showing an example of attaching each elastic member 4 to the continuous hack sheet 7. As shown in FIG. While moving the continuous hack sheet 7 in its length direction at a given speed, on the opposite side along the length direction of the upper surface (inner surface) of the continuous back sheet 7, at a predetermined interval in the length direction, and, The adhesive area 14 is provided on the upper surface of the continuous backsheet 7 that curves inward, leaving an adhesive-unapplied portion 15 at the side edge of the continuous backsheet 7.

Meanwhile, while moving and extending the plurality of continuous elastic members 4 in the same direction as the continuous backsheet 7, the elastic member insertion support portions provided near the tips of the first and second traverses (not shown) are It is inserted and supported through a plurality of parallel guide holes, respectively.

The W arrangement interval of a plurality of (three in the embodiment) guide holes in each of the insertion support portions of the first and second traverses is determined by the lengthwise central portion of the elastic member 4 ( The arrangement spacing is the same as the arrangement interval (see the part indicated by reference numeral 4a in FIG. 3). In addition, the first and second traverses include a traverse W from the starting position PI to the turning position P2 and from the turning position P2 to the starting position HP1 on the continuous hack sheet 7, respectively.
It is designed to reciprocate at right angles to the opposite side areas of the continuous backsheet 7.

The arrangement interval of the plurality of continuous elastic members 4 inserted and supported in the guide holes of each of the insertion support parts of the first and second traverses is such that when each of the insertion support parts is located at the starting position P1,
The arrangement spacing of the guide holes is kept the same, and in that state, a part of each continuous elastic member 4 (see the part indicated by reference numeral 4a in FIG. 3) is glued to the adhesive area 14, or As the insertion support portion moves from the starting position P1 to the turning position P2, it becomes gradually narrower, and in this state, each of the bonded parts is continued.

Further, as each of the continuous elastic members 4 moves from the starting position P1 to the folding position P2, the elongation rate of each continuous elastic member 4 increases slightly, and as a result, the elongation rate of each continuous elastic member 4 increases as shown in FIG. It is lowest at the part 4a shown in , and this part 4
The height gradually increases from point a to point 4b. This means that each continuous elastic member 4, which is stretched at a given stretching ratio and running linearly along the length of the continuous backsheet 7, is forced to change direction to the side of the packsheet 7 through the traverse. This is because, due to the resistance at that time, the continuous elastic members 4 are expanded as they move from the starting position P1 to the turning position P2. However, this depends on the longitudinal running speed 3 of each continuous elastic member 4 and the lateral movement speed of said traverse. When the starting position and the folding position of each of the insertion supports are reversed, that is, when the folding position P2 is set as the starting position and the starting position P1 is set as the folding position, each elastic member 4 moves from position P2 to position P. , the elongation rate becomes slightly higher as the continuous elastic member 4 moves to , and as a result, the elongation rate of each continuous elastic member 4 is highest at the region 4a and gradually decreases from this region 4a to the region 4b.

Depending on the position of the traverse, the unbonded portions 4C of each continuous elastic member 4 either momentarily draw a curved locus as shown in the third figure, or contract immediately after passing the traverse to form the continuous backsheet 7. It is parallel to the side edge along the length of.

In order to make the continuous elastic member 4 supported by the traverse follow the curved shape of the adhesive area 14 on the continuous hack sheet 7, the traverse may be controlled by a cam mechanism.

As shown in FIG. 3, each elastic member 5 consists of one piece, and after or before adhering the continuous elastic member 4 to the upper surface of the continuous hack sheet 7, the length of the upper surface of the continuous hack sheet 7 is A hot melt adhesive area (not shown) applied to the top surface of the continuous backsheet 7 or a hot melt adhesive applied to the elastic member 5 itself under extension to be located at a given position in the direction and across it. Fix with mold adhesive (not shown). Of course, each elastic member 5 can be made up of a plurality of pieces like each elastic member 4.

The core 8 (not shown) is located on the upper surface of the continuous hack sheet 7, between the continuous elastic members 4 facing each other in the lateral direction of the continuous hack sheet 7, and in the longitudinal direction of the continuous hack sheet 7. The elastic members 5 are arranged between opposing elastic members 5 with or without a hot melt adhesive.

A continuous top sheet 6 is used in the manufacturing process of the article shown in FIG. 3, and the upper surface of the continuous back sheet 7 on which the cores 8 are intermittently arranged is hot-melt glued to the lower surface (inner surface). The continuous top sheet, coated with an intermittently coated agent, is coated and bonded to form a continuous laminate.

In FIG. 3, the continuous laminate can be made into unit laminates that are to be made into individual articles by cutting the elastic member 5 along a width direction imaginary line 16 that extends along the length of the continuous laminate. Configure. This cutting causes the unbonded portions 4C of each continuous elastic member 4 to contract.

The unit laminate is constructed by folding the unit laminate in half in the longitudinal direction at the center and joining the two side edges together by heat sealing or sonic sealing means to form the article 1 shown in FIG. However, the present invention is not limited to forming the article in the shape of pants or briefs, but as described above, the unit laminate is folded in half in the longitudinal direction at the center thereof and then formed into a shape. Instead of joining both side edges by heat-sealing means, fastening pieces such as pressure-sensitive tape fasteners are attached to both sides of the rear region 11 (see FIG. 2) of the unit laminate as in a conventional open-type diaper. The waist circumference of the unit laminate (article) may be fastened using the fastening pieces.

Further, depending on the article, the core 8 may not be provided.

The top sheet 6 is made of a stretchable nonwoven fabric in the vertical and horizontal directions, the hack sheet 7 is made of an impermeable elastomer sheet or a laminate of this and a nonwoven fabric that is stretchable in the vertical and horizontal directions, and the core 8 is a mixture of fluff pulp, superabsorbent polymer particles, and synthetic JikM. Natural rubber, synthetic rubber, or the like may be used for the elastic members 4 and 5, respectively.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an article according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the article. FIG. 3 is a plan view showing an example of arrangement of elastic members. Articles worn on 4: Elastic member 6: Top sheet 7: Hack sheet Representative Patent Attorney Haruichi Shirahama figure

Claims (1)

[Scope of Claims] A disposable wearing article in which a plurality of elastic members are respectively attached along arc-shaped leg surroundings on both sides of the crotch area located between the front and rear areas of a top sheet and a back sheet, In the article, the spacing between the plurality of elastic members in each of the leg surroundings is widest at a central portion in the longitudinal direction of the elastic member, and gradually narrows from the central portion to both end portions.