WO2001003529A1

WO2001003529A1 - Disposable wearing article

Info

Publication number: WO2001003529A1
Application number: PCT/JP2000/004662
Authority: WO
Inventors: Akiko Saito; Michiyo Matsushita
Original assignee: Uni-Charm Co., Ltd.
Priority date: 1999-07-12
Filing date: 2000-07-12
Publication date: 2001-01-18
Also published as: JP2001020118A; AU6013900A

Abstract

Fusion-bonding is effected at joint portions (6) at which edge portions (7A, 7B) of respective sheet-form fiber aggregates (7, 8) used for a disposable wearing article overlap each other, which are arrayed intermittently in the extending directions of edge portions (7A, 8A), and which include the edges (15, 16) of the edge portions (7A, 8A).

Description

Details Disposable wearable articles Technical field

The present invention relates to a disposable wearing article using a nonwoven fabric. Background art

2. Description of the Related Art Conventionally, in a wearing article made of a thermoplastic synthetic fiber nonwoven fabric, the edges of the nonwoven fabrics are overlapped with each other in a palm shape, and the overlapped portions are welded to join the nonwoven fabrics. The welding may be performed by forming a welding line extending continuously along the edge of the nonwoven fabric, or by forming a dot-shaped welding portion intermittently along the edge.

Among the above-mentioned conventional techniques, in the technique of joining non-woven fabrics by a continuous welding wire, the non-woven fabric is formed into a film at the welding wire portion, the rigidity is increased, and the soft touch inherent to the non-woven fabric is lost. Sometimes. In the technology of joining non-woven fabrics with intermittent welds, although the touch of the non-woven fabric is hardly impaired, the liquid permeates from outside to inside of the article to be worn between the welds. Sometimes it is easy. If the disposable wearable item is a surgical gown, blood and other bodily fluids can penetrate inside the gown.

Accordingly, the present invention provides a disposable wearing article in which sheet-like fiber aggregates such as non-woven fabrics are welded and used, so that the welding does not impair the feel and air permeability of the fiber aggregates. And the penetration of bodily fluids etc. between the welded parts The challenge is to have no. Disclosure of the invention

In order to solve the above-mentioned problems, an object of the present invention is to combine the edges of sheet-like fiber aggregates in a palm-shape manner and weld the overlapped portions to each other to join the non-woven fabrics together. The present invention is characterized in that, in the wearing article, the overlapped portion is intermittently arranged in a direction in which the edge extends. Welding at the joint including the edge of the edge.

The invention has the following embodiments.

(1) The overlapped portions are intermittently joined also in a direction orthogonal to the direction in which the edge extends.

(2) Each of the fiber aggregates has a three-layer structure composed of upper and lower layers and an intermediate layer, and at least the upper and lower layers of the three layers are formed of a nonwoven fabric. BRIEF DESCRIPTION OF THE FIGURES

Fig. 1 is a front view of a worn article (gown).

FIG. 2 is a diagram showing a section taken along a line II-II of FIG.

FIG. 3 is an enlarged view of part I II of FIG.

FIG. 4 is a view taken along the line IV-IV in FIG. BEST MODE FOR CARRYING OUT THE INVENTION

The details of the disposable wearing article according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a front view of a disposable surgical gown 1 as an example of a worn article. The gown 1 has a front body 2, a back body 3, and a pair of sleeves 4, and the back body 3 is divided into a first back body 3A and a second back body 3B so that the back body 3 can be opened and closed. . The front and rear bodies 2 and 3 and the sleeve 4 are formed of a sheet, which is a fiber aggregate such as a nonwoven fabric made of thermoplastic synthetic fiber, and the sheets are joined to each other at joint positions indicated by a large number of dots. Welding at No. 6.

FIG. 2 is a view showing a cut surface of the sleeve 4 taken along a line II-II in FIG. The sheets forming the sleeve 4 are a first composite nonwoven fabric 7 and a second composite nonwoven fabric 8, and these two composite nonwoven fabrics 7 and 8 have edges 7A and 8A, 7B and 8B. And weld together at the joint 6 to form an annular cross section. The first and second composite nonwoven fabrics 7 and 8 have the same configuration, and include an inner layer 11, an outer layer 13 and an intermediate layer 12, and the inner layer 11 and the outer layer 13 are made of polypropylene. The core is made of a spunbonded nonwoven fabric composed of polyethylene-sheathed composite fibers, and the middle layer 12 is formed of a polypropylene meltblown nonwoven fabric, and each nonwoven fabric has a thickness of 13 to 25 g. / m ² basis weight. The inner and outer layers 11 and 13 and the intermediate layer 12 are welded and integrated to form first and second composite nonwoven fabrics 7 and 8 having a three-layer structure. At the joint 6, the polyethylene of the composite fibers in the inner layers 11 of each other is welded to each other.

FIG. 3 is an enlarged view of a part III indicated by a virtual line in FIG. The joining portion 6 where the first and second composite nonwoven fabrics 7 and 8 are welded is circular and has a diameter of 0.5 to 3 mm, and the edges 7 A and 8 A of the first and second composite nonwoven fabrics 7 and 8. Are formed intermittently in the direction in which they extend (horizontal direction in the figure) and in the direction perpendicular to that direction and inward from the edges 7A and 8A (vertical direction in the figure). In addition, at 6 A of the joint 6, The edges 15A and 16A of the edges 7A and 8A are welded to each other, and at the portion Y between the adjacent joining portions 6A and 6A, the edges 15 and 16 are alternated. It only overlaps and is not welded, so the feel when the skin touches the site Y is as soft as when the first and second composite nonwoven fabrics 7 and 8 are touched. The distance d between adjacent joints 6 is in the range of 0.2 to 5 mm, more preferably 0.2 to 2 mm, and even more preferably 0.3 to 0.7 mm. Therefore, it is desirable that the width W at which the joints 6 are distributed from the edges 15 and 16 toward the inside thereof is in the range of 2 to 10 mm.

FIG. 4 is a view taken along the line IV-IV in FIG. The first and second composite nonwoven fabrics 7, 8 are compressed in the thickness direction at the joint 6 and are welded. At site 6 in the figure, the layers of the first and second composite nonwoven fabrics 7 and 8 are shown so that they can be identified, but it is generally difficult to identify them with an actual composite sheet. At the site Y, the first and second composite nonwoven fabrics 7 and 8 overlap, and the inner layers 11 are in close contact with each other. The inner layer 11 in the illustrated example is formed of hydrophobic fibers, and the fibers adhere to each other to prevent liquid such as blood from permeating into the sleeve 4 from the site Y, and to prevent the sleeve 4 from leaking. The air permeability between the inside and outside of 4 can be secured.

The wearing article of the present invention obtained by joining the first and second composite nonwoven fabrics 7 and 8 as shown in the figure shows that the joining portions 6 are formed intermittently so that the edges 7A, 7B and 8 are formed. Not only is the softness of A, 8 mm soft, but also the edges 15, 16 of the first and second composite nonwoven fabrics 8, 8 are soft. Joining the non-woven fabrics in such a manner that they overlap each other in a palm-shape manner does not hinder obtaining comfortable wearing articles. It is possible to increase the production speed of goods. Such a bonding mode can be applied to a portion other than the sleeve 4 of the gown 1. In addition, it is also useful to apply this bonding mode not only to the gown 1 in the illustrated example but also to work clothes on the site where sewage and oil droplets are scattered.o

The wearing article 1 according to the present invention can be made of a two-layer or one-layer nonwoven fabric in addition to the three-layer first and second composite nonwoven fabrics 7 and 8. The fibers forming the nonwoven fabric are preferably thermoplastics, but other fibers can be mixed up to 20% of the weight of the nonwoven fabric. The wearing article according to the present invention using a sheet-like fiber aggregate such as a non-woven fabric is capable of intermittently welding the edges of the fiber aggregates that overlap in a palm-shape manner, and the edge of the edge. Is also intermittently welded, so that the edges and the vicinity thereof are soft to the touch and have air permeability, and can prevent the penetration of liquid.

Claims

The scope of the claims

1. The disposable wearing article including the structure in which the nonwoven fabrics are joined together by overlapping the edges of the sheet-like fiber aggregates in a palm-shape manner and welding the overlapped portions. In,

The worn article, wherein the overlapped portions are intermittently arranged in a direction in which the edge extends, and are welded at a joint portion including an edge of the edge.

2. The wearing article σ according to claim 1, wherein the overlapped portion is intermittently joined also in a direction orthogonal to a direction in which the edge extends.

DD ο

3. The fiber assembly according to claim 1 or 2, wherein each of the fiber aggregates has a three-layer structure including upper and lower layers and an intermediate layer, and at least the upper and lower layers of the three layers are formed of a nonwoven fabric. Wear articles.