JP2002153509A - Throwaway short pants - Google Patents

Abstract

PROBLEM TO BE SOLVED: To give a twist to the joining structure of both side edges so that any one of the appearance, touch, hand and feeling of wearing may be improved. SOLUTION: When joining both side edges 16a of a twofold sheet laminate 16, both side edges 16a are inwardly folded, the outsides of the folded bases are jointed (a), the folded portions are anteriorly and posteriorly folded, and insides of the leading ends of the folded portions 16c are joined (b) to the insides of the sheet laminate 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to disposable pants with a devised joint structure at both side edges.

[0002]

2. Description of the Related Art As shown in FIG. 7 (a), in a general disposable pants 1, a sheet laminate 3 including an absorber 2 is folded back and forth, and both side edges 3a are joined to each other. A waist opening 4 and a pair of leg openings 5 are formed, and rubber elastic elastic yarns 6a and 6b are provided around these openings 4 and 5 to provide waist gathers and legs. Gathers are formed respectively.

[0003]

In the disposable pants 1 as described above, as shown in FIGS. 7 (a) and 7 (b),
There is a sheet laminate 3 in which both side edges 3a are projected outwardly and joined by heat sealing or the like. However, since the both side edges 3a are projected outward, the appearance is impaired. There is a problem that the touch is bad.

As shown in FIG. 7 (c), there is a sheet laminate 3 in which both side edges 3a are projected inward and joined by heat sealing or the like. Because of the one-sided protruding state, the side edges 3a have a rough feeling. When such disposable pants 1 are worn for a long time, the inwardly protruding side edges 3a hit the skin and hurt, causing discomfort. And there is a problem that the texture and the feeling of wearing are poor.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and has a structure for joining both side edges so as to improve the appearance, the touch, the texture, and the feeling of wearing. It is an object of the invention to provide a disposable disposable pants.

[0006]

In order to solve the above-mentioned problems, the present invention is directed to a sheet laminate including an absorber, which is folded back and forth, and both side edges thereof are respectively joined to form a waist opening and a pair of sheets. The disposable pants in which the leg openings are formed, the side edges are each folded inward, and the outer surfaces of the folded bases are joined to each other, and the folded portions are arranged in the front-rear direction. The present invention provides disposable pants in which each of the folded portions is folded, and the inner surface on the tip side of each folded portion is joined to the inner surface of the sheet laminate.

According to the present invention, when joining the both side edges of the sheet laminate folded in half back and forth, each side edge is folded inward, and the outer surfaces of the folded bases are joined to each other. In addition to securing the peeling resistance in the lateral direction of the pants, each folded portion is folded back and forth, and the inner surface on the leading end side of each folded portion is joined to the inner surface of the sheet laminate, so that each folded portion has the inner surface of the pants. It follows the flat.

According to a second aspect of the present invention, the sheet laminate is
It consists of a skin side sheet and an outer side sheet having air permeability,
The absorbent body has a thin sheet-shaped absorbent core interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet and fixed on a nonwoven fabric substrate mainly composed of a highly absorbent polymer. It is preferable that the back sheet is bonded and fixed to the upper surface of the skin-side sheet.

Preferably, the joining is joining by a hot melt adhesive or / and joining by heat sealing.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1A is a perspective view of disposable pants, FIG. 1B is an enlarged sectional view taken along the line AA of FIG. 1A, FIG.
(A), (b) is a partially enlarged sectional view of the joint structure, FIG.
(A) to (c) are exploded cross-sectional views of a joining procedure, FIG. 4 is a front view in an expanded state, and FIG. 5 is an exploded perspective view.

As shown in FIGS. 4 and 5, the disposable pants 11 are basically constituted by a sheet laminate 16 composed of an outer sheet 12 and a skin sheet 13 and an absorber 14.

The outer sheet 12 is liquid-permeable or liquid-impermeable due to water repellency, the skin sheet 13 is liquid-permeable, and both sheets 12, 13 have at least air permeability. It is formed in a pants-type shape with a synthetic fiber nonwoven fabric. The outer sheet 12 and the skin sheet may both be air-permeable synthetic resin films.

Leg openings S are formed on both sides of the crotch portion R between the front abdomen (front body) P and the back back (rear body) Q, respectively. A waist opening T (see FIG. 1) is formed at an upper portion between the abdomen P and the back portion Q.

A plurality of waist elastic yarns 15a are attached to the upper surface of the front abdomen P and the back back Q of the outer side sheet 12 in a state of being extended in the width direction, and a peripheral edge of each leg opening S is provided. A plurality of leg elastic yarns 15b are respectively attached in a state of being extended in the length direction along. The waist elastic yarn 15a is attached to the front abdomen P and the back back Q, and the leg elastic yarn 15b is attached to the leg opening S.
A plurality of elastic yarns are arranged side by side in a stretched state, and in a stretched state, a long stretchable material (ribbon-like elastic band) sandwiched and fixed between upper and lower surfaces with a cloth such as a non-woven fabric is fixed to each of the above-described portions to expand and contract. It can be a gathered shape. Also, unlike the case where the ribbon-shaped elastic band is used, a means for guiding the leg elastic yarns 15b in a sine curve shape on the outer surface side sheet 12 and connecting and fixing them to form elastic gathers in the leg openings S is, of course, also available. Can be adopted. In the case of this method, the leg elastic yarn 15b is attached so as to cross the crotch portion R in a state of being extended in the width direction, and after this attachment, only the leg elastic yarn 15b of the crotch portion R is cut by a cutter. Thus, it is preferable that the contraction force does not act on the crotch part R. Each of the elastic yarns 15a and 15b is formed of a band-like or thread-like natural rubber or a synthetic rubber. Note that a plurality of bodyfit elastic yarns may be attached to the upper surface of the front abdomen P and the rear back Q of the outer sheet 12 in a state of being extended in the width direction.

The skin-side sheet 13 has the same outer shape as the outer-side sheet 12 but has a shorter length than the outer-side sheet 12, and the leg-side elastic thread 15b is interposed therebetween. To the outer sheet 12.

The waist elastic thread 15a is adhered in a state of being sandwiched between the folded portions 12a at the front and rear ends of the outer sheet 12.

The absorbent core 14a of the absorbent body 14 has a thin sheet shape mainly composed of a highly absorbent polymer and fixed on a nonwoven fabric substrate. The upper surface of the absorbent core 14a is covered with a liquid-permeable top sheet 14b. The lower surface is covered with a liquid-impervious back sheet 14c, and the periphery thereof is sealed (see Japanese Patent Application No. 2000-175563). In the absorber 14, the back sheet 14c is fixed to the upper surface of the skin-side sheet 13. The absorbent core 14a may be formed by mixing or laminating a natural pulp fiber, a synthetic resin fiber, a highly absorbent resin material, or the like, into a flat hourglass shape, and wrapping the outer periphery with thin paper.
Note that the absorber 14 may be fixed between the outer sheet 12 and the skin sheet 13 (diaper type).

The folded portion 12a at the front and rear ends of the outer sheet 12 is adhered to the upper surface of the top sheet 14b of the absorber 14 at the absorber 14 and is attached to the skin at the skin 13 at the skin side. The adhesive is attached to the upper surface of the sheet 13.

Then, the sheet laminate 1 including the absorber 14
6 is folded back and forth with the crotch R as a boundary, and the front side abdomen P and the side edges 16a of the back part Q are joined to each other as described below, so that it can be assembled in the use state of FIG. become.

Both side edges 16a of the front abdomen P and the back Q
2A, as shown in FIG. 2A, both side edges 16a of the front abdomen P and the back back Q are respectively folded inward, and the outer sheets 12 which are the outer surfaces of the respective folded bases 16b are mutually joined. Join in the vertical direction with a hot melt adhesive (or heat seal) a. Thereby, the horizontal peeling resistance of the disposable pants 11 is ensured.

Next, each folded portion is folded back and forth (see arrow c), and each folded portion 16c is folded.
The skin-side sheet 13 which is the inner surface on the front end side is vertically joined to the skin-side sheet 13 which is the inner surface of the sheet laminate 16 with a hot melt adhesive (or heat seal) b (FIG. 1B). And FIG. 2B). As a result, each folded portion 16c becomes flat along the inner surface of the pants. The lateral peeling resistance of the disposable pants 11 is 0.2 to
About 0.8 kg / cm is appropriate.

The disposable pants 11 configured as described above
In, since both side edges 16a do not protrude outward,
Appearance and feel are improved, and since both side edges 16a do not protrude inward, the feeling of stiffness disappears, the discomfort does not occur even when worn for a long time, and the feeling and feeling of wearing are also improved. .

Both side edges 16a of the front abdomen P and the back Q
Is practically performed as shown in FIG. That is, when the sheet laminate 16 is folded back and forth at the crotch R as a boundary, as shown in FIG. 3A, the skin side sheet 13 is on the outside and the outer side sheet 12 is on the inside. The outer sheets 12 which are folded in two and become the folding bases 16b of both side edges 16a of the sheet laminate 16 are mutually joined in the longitudinal direction with a hot melt adhesive a, and then FIG.
As shown in (b), the both side edges 16a are folded outward (see arrow c), and the folded skin side sheets 13 of the both side edges 16a are respectively attached to the skin side sheets 13 with the hot melt adhesive b. After joining in the vertical direction, FIG.
As in the above, the skin side sheet 13 may be turned inside out and the outer side sheet 12 may be turned outside.

In the above embodiment, the front side abdomen P and the back side Q are joined by the hot melt adhesives a and b. However, in the case of joining by heat sealing, the front abdomen P and the back back are joined. The joining of the side edges 16a of Q is shown in FIG.
As shown in FIG. 5, both side edges 16a of the front abdomen P and the back back Q are respectively folded inward, and the outer side sheets 12, which are the outer surfaces of the respective folded bases 16b, are vertically joined to each other by heat sealing a. . In this case, disposable pants 11
In order to ensure a lateral peeling resistance of about 0.2 to 0.8 kg / cm, the bonding width W is preferably about 2 to 10 mm.
If it exceeds, the hardness of the joined portion increases and the feel becomes poor.

Then, the heat seal a is folded back in the direction of the back portion Q together with the folded portion on the back portion Q side (see arrow c), and as shown in FIG. The skin-side sheet 13 as the inner surface on the tip side of 16c is vertically joined to the skin-side sheet 13 as the inner surface of the sheet laminate 16 with the hot melt adhesive b, and the folded portion 16c on the front abdomen P side is formed. The skin-side sheet 13 that is the inner surface on the front end side is vertically joined to the skin-side sheet 13 that is the inner surface of the sheet laminate 16 with the hot melt adhesive b. As a result, each folded portion 16c becomes flat along the inner surface of the pants. The heat seal a may be folded back in the direction of the front abdomen P.

Each of the above-mentioned junctions does not need to be a continuous linear shape, but may be an intermittent linear shape, or a combination of longitudinal dots, horizontal lines and oblique lines.

[0028]

As is clear from the above description, according to the present invention, since both side edges are flat along the inner surface of the pants, both side edges do not protrude outward, so that the appearance and touch are improved. Also, since both side edges do not protrude inward, the feeling of stiffness disappears, the discomfort does not occur even when worn for a long time, and the feeling and the feeling of wearing are also improved.

[Brief description of the drawings]

FIG. 1 is a disposable pants according to the present invention,
(A) is a perspective view, (b) is a sectional view corresponding to the line AA of (a).

FIGS. 2A and 2B are partially enlarged cross-sectional views of a joint structure at both side edges.

FIGS. 3A to 3C are exploded cross-sectional views illustrating a procedure for joining both side edges with a hot melt adhesive.

FIG. 4 is a front view of the disposable pants in an unfolded state.

FIG. 5 is an exploded perspective view of the disposable pants.

FIGS. 6A and 6B are partially enlarged cross-sectional views of a joining structure of both side edges by heat sealing.

FIG. 7 is a conventional disposable pants, in which (a) is a perspective view, and (b) and (c) are cross-sectional views corresponding to line BB of (a).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Disposable pants 12 Outer side sheet 13 Skin side sheet 14 Absorber 16 Sheet laminated body 16a Both side edges 16b Folding base 16c Folding part P Front abdomen Q Rear back S Leg opening T Waist opening a, b Joining

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masaru Fujioka 89-1 Oyamakita, Ota, Sadamitsu-cho, Mima-gun, Tokushima Prefecture Inside the Toyoshima Saeki Co., Ltd.'s Tokushima Sadamitsu Plant (72) Inventor Satoshi Maeda Sadamitsu-cho, Mima-gun, Tokushima 89-1 Ota-Kita Oyamakita Toyo Eiki Co., Ltd. Tokushima Sadamitsu Plant (72) Inventor Sachiko Tateiwa 89-1 Ota Kita Oyamakita Sadamitsu-cho, Mima-gun, Tokushima Prefecture Toyo Eiki Co., Ltd. Tokushima Sadamitsu Plant F-term (reference) 3B029 BD02 BD11 BD14 BD17 4C098 AA09 CC12 CC14 CC27 CE05 DD10 DD12

Claims (3)

[Claims] 1. A disposable pants in which a sheet laminate including an absorber is folded back and forth, and both side edges thereof are respectively joined to form a waist opening and a pair of leg openings. Both side edges are folded inward, and the outer surfaces of the folded bases are joined to each other, and the folded portions are folded back and forth, respectively. Disposable pants characterized by being bonded to the inner surface of the laminate. 2. The sheet laminate comprises a skin-side sheet having air permeability and an outer-side sheet, and the absorber is provided between a liquid-permeable top sheet and a liquid-impermeable back sheet. An absorbent core in the form of a thin sheet fixed on a non-woven fabric base mainly with a super absorbent polymer is interposed,
The disposable pants according to claim 1, wherein the back sheet is fixedly joined to an upper surface of the skin side sheet. 3. The bonding according to claim 1, wherein the bonding is bonding by a hot melt adhesive and / or bonding by heat sealing.
Or the disposable pants according to claim 2.