JP2022187281A - Multiplex woven fabric - Google Patents

Abstract

To provide a heat insulating multiplex woven fabric that can maintain a heat insulating property even if external force is added in a thickness direction.SOLUTION: A multiplex woven fabric 10 has at least a pair of external front and back woven fabrics 1 and 1 and an intermediate woven fabric 2 disposed between the pair of external woven fabrics 1 and 1. At least either one of warp 21 and weft 22 that constitute the intermediate woven fabric 2 is formed of bulky textured multifilament. Woven texture of the intermediate woven fabric 2 has a high flexible texture area A with higher flexibility and a low flexible texture area B with lower flexibility than the high flexible texture area A.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a multi-ply fabric, and more particularly to a multi-ply fabric having excellent heat retention.

BACKGROUND ART Quilting fabrics have been known as fabrics with excellent heat retention properties, and are used, for example, in down jackets, other winter clothing, bedding, and the like.

However, in order to produce this quilting fabric, it is necessary to insert the batting between a pair of front and back outer fabrics and to sew the outer fabrics together, which has the disadvantage that the production is time-consuming. In addition, there is a problem that the filling of the quilting fabric is unevenly distributed during use or washing, and that the filling leaks out from the seams of the outer cloth, generating dust.

Thus, until now, multi-layered fabrics described in Patent Documents 1 to 3 below, for example, have been proposed as fabrics with excellent heat retention properties to replace such quilting fabrics. These multi-ply fabrics are made by forming a heat insulating layer containing air by providing a bulky yarn or inner fabric between a pair of outer woven fabrics on the front and back. For example, it is possible to produce in a single work process using a loom, and since the outer woven fabric has no seams, the generation of dust can be greatly suppressed.

However, when some kind of external force is applied in the thickness direction of these conventional heat-retaining multi-layered fabrics, the heat-insulating layer formed by bulky yarns and inner woven fabrics is easily crushed, and the heat-retaining property is significantly reduced. I had the problem of going down.

JP-A-54-88359 JP-A-61-75841 JP 2010-270406 A

The present invention was devised in view of the above-mentioned drawbacks of conventional heat-retaining multi-ply fabrics. An object of the present invention is to provide a multi-layered woven fabric that can be

The present invention relates to a multi-layered woven fabric comprising at least a pair of outer woven fabrics on the front and back sides and an inner woven fabric provided between the pair of outer woven fabrics, wherein at least warp and weft yarns constituting the inner woven fabric are One of them is made of bulky multifilament, and the woven structure of the middle woven fabric is a high flexibility tissue region with high flexibility and a low flexibility tissue region with lower flexibility than the high flexibility tissue region. It is characterized by having

Further, in the present invention, the number of intersecting points of warp and weft per unit area of the high flexibility tissue region is zero or the number of intersecting points of warp and weft per unit area of the low flexibility tissue region is higher than the number of intersecting points of warp and weft per unit area. is characterized by less

Further, the present invention is characterized in that a plurality of inner woven fabrics are provided between the pair of outer woven fabrics.

The multi-ply fabric according to the present invention is composed of multifilaments in which at least one of the warp yarns and the weft yarns constituting the inner woven fabric provided between the pair of outer woven fabrics on the front and back sides is bulked, and the inner woven fabric is made of Since the woven structure has a high flexibility tissue region with high flexibility and a low flexibility tissue region with lower flexibility than this high flexibility tissue region, even if an external force is applied in the thickness direction, the The low-softness tissue region of the woven fabric serves as a support against external force, and can retain the heat insulating layer formed in the high-softness tissue region, effectively maintaining the heat retention of the multi-ply fabric.

FIG. 4 is a partial cross-sectional view of the multi-ply fabric of the present embodiment; FIG. 4 is a partial plan view of the inner woven fabric of the multi-ply woven fabric of the present embodiment; FIG. 3 is a partial cross-sectional view taken along line EE in FIG. 2; FIG. 4 is an enlarged partial cross-sectional view of the multi-ply fabric of the present embodiment; FIG. 4 is an enlarged partial cross-sectional view of the multi-layered fabric of the present embodiment in a state where an external force is applied in the thickness direction; FIG. 4 is an enlarged partial cross-sectional view of another embodiment of a multi-ply fabric according to the present invention;

As shown in FIG. 1, the multi-layered fabric 10 of this embodiment comprises a pair of outer woven fabrics 1, 1 on the front and back sides, and an inner woven fabric 2 provided between the pair of outer woven fabrics 1, 1. It is

The outer woven fabric 1 is constructed by plain-weaving warp yarns 11 and weft yarns 12 . A pair of front and back outer woven fabrics 1, 1 are joined together at a plurality of joining portions 3 spaced apart by a predetermined interval in the weft direction, and an internal space 4 is formed between the joining portions 3.

In this embodiment, as the warp yarns 11 and the weft yarns 12, a 75-denier multifilament in which a total of 48 polyester long fibers are aligned is used. Crimps are developed by heat treatment after false twisting and weaving. Further, in this embodiment, the pair of outer woven fabrics 1, 1 are joined together by alternating the front and back positions of the pair of outer woven fabrics 1, 1 at each joining portion 3. As shown in FIG.

In addition, the front and back positions of the pair of outer woven fabrics 1 do not necessarily have to be alternated at each joint 3. The pair of outer woven fabrics 1, 1 may be joined together by knotting the warp yarns 11 of the two. Further, instead of the weft direction joining portion 3, or together with the weft direction joining portion 3, the pair of outer woven fabrics 1 may be joined at a plurality of joining portions spaced apart by a predetermined distance in the warp direction. Also, the planar shape of the internal space formed between these joints does not necessarily have to be a quadrangular shape along the latitude and longitude directions. It can be formed into various shapes depending on the requirements.

The inner woven fabric 2 is woven with warp yarns 21 and weft yarns 22 and is provided in the internal space 4 . In this embodiment, as the warp 21 and weft 22, a 150-denier multifilament in which a total of 48 polyester long fibers are aligned is used. Crimps are developed by heat treatment after false twisting and weaving.

As shown in FIGS. 2 and 3, the weaving structure of the middle woven cloth 2 consists of a high flexibility tissue region A having high flexibility and a low flexibility tissue region B having lower flexibility than the high flexibility tissue region A. and

In the highly flexible tissue region A of this embodiment, the weft yarns 22 float above all the warp yarns 21 in the region A, and the warp yarns 21 and the weft yarns 22 do not cross each other. That is, in the highly flexible tissue region A of the present embodiment, the warp yarns 21 and the weft yarns 22 respectively float from the front side of the inner woven cloth 2 to the front side via the back side and then to the front side again, or from the back side to the front side via the back side and again to the back side. There is no crossing point that sinks in, bends and rises and sinks with each other, and the number of crossing points is zero. Therefore, the warp yarns 21 and the weft yarns 22 in the highly flexible tissue region A are not constrained by each other, and their bulkiness is maximized, and the highly flexible tissue region A is relatively thick. becomes larger and exhibits a higher degree of flexibility.

On the other hand, as shown in FIG. 2, the low-flexibility tissue region B of the present embodiment is configured by plain weaving the warp yarns 21 and the weft yarns 22, and the warp yarns 21 and the weft yarns 22 are respectively There are many intersecting points C that float from the front side through the back side to the front side again, or sink from the back side to the back side via the front side and sink back to the back side again while bending. Therefore, the warp yarns 21 and the weft yarns 22 in the low-flexibility tissue region B are tightly bound to each other at these many crossing points C, and their bulkiness is restricted. As it becomes thinner than the soft tissue region A, the tissue becomes tighter and exhibits less flexibility.

Thus, in the multi-ply fabric 10 of the present embodiment, the warp yarns 21 and weft yarns 22 constituting the middle woven cloth 2 are made of bulky multifilaments, and the weaving structure of the middle woven cloth 2 does not have crossing points. Since it has a high flexibility tissue region A and a low flexibility tissue region B having a large number of crossing points C, as shown in FIG. The bulkiness of the warp yarns 21 and the weft yarns 22 is maximized to form a relatively thick heat insulating layer S1 that swells to a large extent. A heat insulating layer S2 is formed in the space between 1 and 1, so that the entire multi-layer fabric can exhibit excellent heat retention.

Then, as shown in FIG. 5, when an external force (see white arrows in FIG. 5) is applied to the front and back surfaces of the multi-layered fabric 10 of the present embodiment in the thickness direction as a whole, the external force reduces flexibility. Although the heat insulating layer S1 of the high flexibility tissue region A is slightly compressed, the low flexibility tissue region B with low flexibility serves as a support against the external force, and the heat insulation layer S1 of the high flexibility tissue region A can be prevented from being further crushed. As a result, the heat insulating layer S1 of the high flexibility tissue region A can be maintained according to the thickness of the low flexibility tissue region B, and the heat retention of the multi-layered fabric 10 can be effectively maintained.

Although the multi-ply fabric 10 of this embodiment has been described above, the present invention can also be implemented in other embodiments.

For example, in the above embodiment, the number of intersecting points between the warp yarns 21 and the weft yarns 22 in the highly flexible tissue region A is zero, but the present invention is not necessarily limited to this. may have intersecting points, and may be composed of, for example, satin weave, twill weave, their variation organization, union organization, or other organization. Also, the low-softness tissue region B does not necessarily have to be a plain weave, and may be composed of, for example, a satin weave, a twill weave, a variation of these, a union, or other organization. In short, the number of intersecting points C between the warp yarns 21 and the weft yarns 22 per unit area in the high flexibility tissue region A is zero, or the number of the warp yarns 21 and the weft yarns 22 per unit area in the low flexibility tissue region B is zero. should be smaller than the number of crossing points C of . The warp yarns 21 and the weft yarns 22 are bent to each other to limit the bulkiness of the crossing points. It is sufficient if a difference in flexibility is provided.

Further, in the above-described embodiment, the high flexibility tissue region A and the low flexibility tissue region B are directly adjacent to each other and arranged in a lattice pattern in the longitudinal direction, but the present invention is not limited to this. , another tissue region may be interposed between the high flexibility tissue region A and the low flexibility tissue region B, and the high flexibility tissue region A and the low flexibility tissue region B may simply be separated in the latitudinal direction or They may be arranged in parallel only in the longitudinal direction. In addition, the area of each region of the high flexibility tissue region A and the low flexibility tissue region B and the number of warp and weft yarns constituting each region do not necessarily have to be the same as in the above embodiment, and each region can be different.

Further, as in the multiple woven fabric 20 shown in FIG. 6, a plurality of inner woven fabrics may be provided between the pair of outer woven fabrics 1.1. This multi-layer fabric 20 is provided between the outer woven fabrics 1 and 1 with a first inner woven fabric 2a and a second inner woven fabric 2b each having a high softness tissue region A and a low softness tissue region B. The first inner woven fabric 2a and the second inner woven fabric 2b are joined to each other at a plurality of joining portions (not shown) spaced apart by a predetermined interval in the warp direction, with their front and back positions alternated. there is By providing a plurality of inner woven fabrics between a pair of outer woven fabrics in this way, it is possible to provide a multi-ply fabric that is more flexible and has excellent heat retention. The plurality of inner woven fabrics may not be connected to each other, and the positional relationship between the high flexibility tissue region A and the low flexibility tissue region B between the plurality of inner woven fabrics may be changed in various ways. It is possible. Also, a plurality of outer woven fabrics may be provided on each of the front and back sides of the multiple woven fabric.

Although the multi-ply fabric of the present embodiment has been described above, the present invention can be implemented with various improvements, modifications, and variations based on the knowledge of those skilled in the art without departing from the spirit of the present invention. be. In addition, any of the matters specifying the invention may be replaced with other techniques within the scope of producing the same action or effect, and the integrally configured matters specifying the invention may be constructed from a plurality of members. Alternatively, the matters specifying the invention, which are composed of a plurality of members, may be implemented in a form integrally configured.

10, 20 Multiple fabric 1 Outer fabric 11 Warp 12 Weft 2, 2a, 2b Inner fabric 21 Warp 22 Weft A High flexibility tissue region B Low flexibility tissue region C Intersection point

Claims (3)

A multi-layer woven fabric comprising at least a pair of outer woven fabrics on the front and back and an inner woven fabric provided between the pair of outer woven fabrics,
At least one of the warps and wefts constituting the inner woven fabric is made of multifilament processed to be bulky,
A multi-ply fabric, wherein the woven structure of the intermediate woven fabric has a high flexibility structure region with high flexibility and a low flexibility structure region with lower flexibility than the high flexibility structure region. The number of intersecting points of warp and weft per unit area of the high flexibility tissue region is zero or less than the number of intersecting points of warp and weft per unit area of the low flexibility tissue region. A multi-layered fabric according to claim 1. 3. The multi-ply fabric according to claim 1, wherein a plurality of said inner woven fabrics are provided between said pair of said outer woven fabrics.

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