JP2589957Y2 - Disposable pants-type wearing article - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable pants-type wearing article, and more particularly to a disposable pants-type wearing article in which laterally opposed sides of the disposable pants-type wearing article are intermittently joined.

[0002]

2. Description of the Related Art Conventionally, disposable pants-type wearing articles such as training pants and pants-type disposable diapers generally comprise a top sheet and a back sheet made of a flexible fiber material or a thermoplastic synthetic resin film. After the absorber is interposed between the two sheets, the front body and the back body are joined to each other at laterally opposed sides to form a pants type. The joining means in such a case includes ultrasonic fusion, embossing, bonding, and suturing.

[0003]

When at least one of the top sheet and the back sheet contains a heat-fusible material, a material such as ultrasonic fusing or hot embossing is melted and pressurized in the joining means and joined. Means are available.
However, there is a problem that if the fusion bonding portion is located on the same surface as the sheets or is melted, the skin of a wearer such as an infant may be strongly stimulated.

An object of the present invention is to provide a disposable pants-type wearing article having a fusion joint that does not cause the above-mentioned problem.

[0005]

This invention comprises a liquid-permeable top sheet and a liquid-impervious back sheet, at least one of which contains a heat-fusible material, and a front body made of these two sheets. The present invention relates to an improvement in a disposable pants-type wearing article in which a laterally opposed side portion of a back body is joined by a fusion joining portion applied thereto.

The feature of the present invention is that the top sheet is made of a thermoplastic fiber non-woven fabric, and the back sheet is made of a thermoplastic fiber non-woven fabric and a thermoplastic elastomer film overlapping the inner surface thereof. The back sheet overlaps with the thermoplastic elastomer film via the thermoplastic elastomer film to form three layers,
In the state where the three layers of the front and rear bodies overlap each other so that the top sheet is located inside on the laterally facing side portion, the fusion bonding portion is in the vertical direction of the diaper.
A thin layer that extends linearly in the intersecting direction and is arranged so as to be intermittently arranged in the longitudinal direction thereof, and that the joining portion forms a thin layer that is recessed from the surface of the back sheet located on the outer surface of the diaper and is not melted. And the joint is 1 to 10
0 mm ² , and the arrangement interval of the joints is larger than 0.5 mm.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The wearing article according to the present invention will be described below with reference to the illustrated embodiment.

FIG. 1 is a perspective view of a disposable pants-type diaper according to the present invention, which is partially cut away. The diaper 1 includes a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, an absorber 4 interposed between these two sheets,
It comprises a waist elastic member 5 and a leg elastic member 6. The elastic members 5 and 6 are caused to contract by their contraction,
Gathers are formed on the periphery of each of the leg openings 8.
Laterally opposed sides 10 of the front body 10 and the back body 11
A, 11A are joined along a joining zone 14 extending in the longitudinal direction of the diaper. As the top sheet 2, a flexible and stretchable nonwoven fabric is used in which thermoplastic synthetic fibers are entangled under the action of a high-pressure water stream and then crimped by heat treatment. As the absorbent body 4, a pulverized pulp mixed with 5 to 15% by weight of a highly absorbent polymer and shaped into a panel is used. The backsheet 3 has a two-layer structure, a flexible and stretchable liquid-impervious film 16 made of a thermoplastic elastomer, and a stretchable material similar to the topsheet 2 but having a smaller basis weight. A non-woven fabric 17 intermittently joined with a hot melt adhesive is used with the non-woven fabric 17 positioned on the outer surface of the diaper.
The top sheet 2 and the back sheet 3 have substantially the same dimensions and outer shape, and extend outward from the peripheral edge of the absorber 4, and have a three-layer structure in the extended peripheral portion, that is, in a region where the absorber 4 is not located. In an overlapping state. The two sheets 2 and 3 are joined to each other by the hot melt adhesive in the area.

FIG. 2 is a part of a cross section taken along line XX in FIG. Three layers of the front and rear bodies 10, 11, that is, the top sheet 2 of the thermoplastic fiber non-woven fabric, the three layers of the thermoplastic elastomer fimul 16 and the thermoplastic fiber non-woven fabric 17 constituting the back sheet are the top sheet in the laterally opposed side portion 10A. 2 are superimposed on each other so as to be located inside, and in the superimposed state, the non-joined portion 1 is formed by ultrasonic fusion along the joining zone 14 by ultrasonic fusion.
4B. At the upper end and the lower end of the joining zone 14, non-joining portions 14E and 14E 'larger than the non-joining portion 14B are arranged (see FIG. 1), and the front body 10 and the rear body 11 are gripped. Are easily torn along the junction zone 14. The joining portion 14A is in a direction intersecting the vertical direction of the diaper.
The topsheet 2 and the backsheet 3 are melted and united so as to extend linearly and intermittently in the longitudinal direction, and the thermoplastic fiber nonwoven fabric 17 positioned on the outer surface of the backsheet 3
And formed a thin layer that is not recessed from the outer surface and is not melted.
The processing of the joint 14A can be easily performed by a known ultrasonic welding or embossing means. It is preferable that the joining portion 14A is in the range of 1 to 100 mm ² and the arrangement interval is larger than 0.5 mm in order to achieve the desired effect of the present invention.

[0010]

According to the present invention, the fusion joints on the laterally opposite sides of the front and rear bodies are intermittently arranged in the vertical direction of the diaper, and the joints are recessed from the surface of the back sheet. The joint does not directly contact the wearer's skin and strongly stimulate it.

[0011] is in the range wherein the junction of 1 to 100 mm ^2, and, since the arrangement interval of the joint is greater than 0.5 mm, it is possible to obtain the above effects more reliably.

The joints are arranged intermittently in the vertical direction of the diaper, that is, in the direction along the laterally opposite side portions of the front and rear bodies, and have the above-mentioned dimensions. At the joint, one layer of the top sheet and three layers of the two layers of the back sheet overlap each other to make a total of six layers, and the longitudinal direction of the diaper
Extend linearly in the direction that intersects with and intermittently in the longitudinal direction
They are arranged and extend in the vertical direction of the diaper.
Lines of the same width and intermittently arranged in the same direction ( sewing machine
Tearing in the longitudinal direction of the diaper compared to when it is eye-shaped)
Due to high resistance to tearing while wearing
He, as a result, there is no risk, such as fall shift diapers.

[Brief description of the drawings]

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

FIG. 2 is a sectional view taken along line XX of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wearing article 2 Top sheet 3 Back sheet 10 Front body 10A Lateral facing side 11 Rear body 11A Lateral facing side 14A Joining part

Claims (1)

(57) [Scope of request for utility model registration] 1. A liquid-permeable top sheet and a liquid-impervious back sheet, both of which contain a heat-fusible material. In the disposable pants-type wearing article joined by the applied fusion joint, the top sheet is made of a thermoplastic fiber non-woven fabric, and the back sheet is made of a thermoplastic fiber non-woven fabric and a thermoplastic elastomer film overlapping the inner surface thereof, The top sheet and the back sheet in the front and rear bodies overlap with each other via the thermoplastic elastomer film to form three layers, and each of the three layers of the front and rear bodies has the top sheet inward at the laterally facing side portion. In a state where they overlap each other so as to be located, the fusion-bonded portion is aligned with the vertical direction of the diaper.
A thin layer that extends linearly in the intersecting direction and is arranged so as to be intermittently arranged in the longitudinal direction thereof, and that the joining portion forms a thin layer that is recessed from the surface of the back sheet located on the outer surface of the diaper and is not melted. And the joint is 1 to 10
The wearing article is in the range of 0 mm ^2, and the arrangement interval of the joint being greater than 0.5 mm.