JPH0541523U - Disposable pants-type wearing article - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To melt and join the laterally opposite sides of the worn article so as not to irritate the wearer's skin. [Structure] The laterally opposite side portions (10A, 11A) are intermittently fusion-bonded to each other, and the respective joint portions (14A) are closed with a melted material without breaks.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 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 side portions of the disposable pants-type wearing article are joined intermittently.

[0002]

[Prior Art]

 Conventionally, disposable pants-type wearing articles, such as training pants and pants-type disposable diapers, generally consist of a soft fiber material or a thermoplastic synthetic resin film, etc., and constitute a top sheet and a back sheet, which are required. Accordingly, an absorbent body is interposed between the two sheets, and the front body and the back body made of these sheets are joined laterally opposite to each other to form a pants-like shape. In such a case, the joining means includes ultrasonic fusion, embossing, bonding, and suturing.

[0003]

[Problems to be solved by the device]

 When at least one of the top sheet and the back sheet contains a heat-fusible material, among the joining means, a means for melting and pressing the material such as ultrasonic welding or hot embossing can be used. However, if the melted material is over-pressurized or the viscosity during melting is lowered too much, it will break and shrink, and after cooling it solidifies into lumps, the material cuts off, or becomes stingy. Sometimes. Therefore, there is a problem that the cuts made of the material as described above may strongly irritate the skin of a wearer such as an infant.

Therefore, the present invention intermittently melt-bonds the laterally opposite side portions of the disposable wearing article, and seals this bonding site with a continuous thin film made of a molten material to achieve the above-mentioned conventional technique. The problem is to solve the problem.

[0005]

Means for Solving the Problems The gist of the present invention to solve the above-mentioned problems is that a liquid-permeable top sheet and a liquid-impermeable back sheet are used, and at least one of these sheets is used. In the disposable pants-type wearing article in which the laterally opposed side portions of the front body and the back body made of both sheets are melt-bonded, the intermittently bonded side surfaces are laterally opposed to each other. In addition, the joint portion is closed by a continuous thin film in which the top sheet and the back sheet are integrated.

[0006]

[Action]

 In this wearing article, the material melted at the joining site is a thin film without breaks, and there is no irritation to the wearer's skin due to cracks or pricks. Intermittent bonding keeps each junction area relatively small and surrounds it with a flexible, non-bonded area, so solidified junctions have less chance of direct skin contact. Become

[0007]

【Example】

 Next, the details of the worn article according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view of a disposable pants-type diaper according to the present invention, a part of which is cut away. The diaper 1 is composed of a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, an absorber 4 interposed between these sheets, a waist elastic member 5, a leg elastic member 6 and the like. . The elastic members 5 and 6 contract at the peripheral edges of the body opening 7 and the leg openings 8 to form a gather. The laterally opposed side portions 10A, 11A of the front body 10 and the back body 11 are joined by intermittent joining lines 14. As the top sheet 2, a flexible and stretchable non-woven 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 crushed pulp shaped product containing 5 to 15% by weight of a highly absorbent polymer is used. The back sheet 3 has a two-layer structure, and is a flexible and stretchable liquid-impervious film 16 made of a thermoplastic elastomer, and a stretch sheet similar to the top sheet 2 but having a smaller basis weight. The non-woven fabric 17 is intermittently joined with a hot melt adhesive. The liquid-impervious film 16 faces the top sheet 2 via the absorber 4, and the nonwoven fabric 17 is used as the outer surface of the diaper 1. The top sheet 2 and the back sheet 3 have substantially the same outer shape, spread outward from the peripheral edge of the absorbent body 4, and are intermittently bonded by a hot melt adhesive in the expanded portion.

FIG. 2 is a part of a cross section taken along line XX in FIG. The joining line 14 is formed by alternately repeating a portion 14A where the materials of the front body 10 and the rear body 11 are melt-bonded by ultrasonic fusion and a non-bonding portion 14B. The joint portion 14A is about 7 × 2 mm (width × height), and the joint portion 14A is a non-joint portion 14B and has a height of about 2. With 5 mm. At the upper end and / or the lower end of the joining line 14, non-joining portions 14E and 14E 'which are larger than the non-joining portion 14B are provided (see FIG. 1), and if they are grasped, the front body 10 and the back body 11 And can be easily torn along the joining line 14. At the joining portion 14A, the top sheet 2 and the back sheet 3 are melted and integrated to form a smooth and continuous thin film that closes the entire joining portion 14A. In addition to the accurate operation of the ultrasonic transmitter, such a thin film must set the clearance between the horn and the anvil of the ultrasonic fusing device and the pressing time of the top sheet 2 and back sheet 3 by the horn, etc. Can be formed with.

In such a diaper 1, although the top sheet 2 and the back sheet 3 are melted by heat, the thin film formed by integrating them has no breaks, and thus the sack and sack There are no thorns. Moreover, the joint portion 14A is surrounded by the relatively thick and flexible non-joint portion 14B even if the thin film is hardened, and it is difficult to directly touch the wearer's skin. It is preferable that the joint portions 14A are generally set within a range of 1 to 100 mm ² , and the joint portions 14A are spaced by 0.5 mm or more.

[0011]

[Effect of the device]

 Each joint is smooth by melting the melted top sheet and back sheet to form an unbroken thin film.In addition, each joint is surrounded by non-joint areas and touches the wearer's skin. Since it is difficult, it is possible to obtain a worn article that does not irritate the skin and has a good feeling of wearing.

[Brief description of 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 Disposable pants-type wearing article 2 Top sheet 3 Back sheet 10 Front body 10A Lateral-opposing side part 11 Rear body 11A Lateral-opposing side part 14A Joint site

Claims (1)

[Scope of utility model registration request] 1. A liquid-permeable top sheet and a liquid-impermeable back sheet.
Disposable pants-type wearing article in which at least one of these sheets contains a heat-fusible material, and the laterally opposed side portions of the front body and the back body made of these sheets are fusion-bonded, The laterally opposed side portions of the front and rear bodies are joined intermittently, and the joined portions are located at the top sheet and the back sheet.
The wearable article is characterized in that it is covered with an unbroken thin film that is integrated with the toe.