JPH06146144A - Bulky knitted fabric - Google Patents

Abstract

PURPOSE:To provide a lightweight bulky knitted fabric excellent in compressional characteristics, capable of making part or the whole of connecting yarns making up a knitted fabric into molten resin. CONSTITUTION:This bulky knitted fabric is a knitted fabric with a multilayer structure made up of a two-sided polyester base fabric and (connecting yarns jointing the two surfaces. In this case, 10 wt.% or more of the connecting yarns are combined filament yarns produced by interlacing high-melting filament yarns such as of polyester and low-melting filament yarns such as of nylon.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention has a multilayer three-dimensional structure,
It is lightweight and bulky, and it can be used as general clothing or sports clothing, and by heating it to a certain temperature, some or all of the connecting yarns that make up the woven or knitted material can be made into a molten resin. The present invention relates to a suitable bulky woven knitted fabric.

[0002]

2. Description of the Related Art In recent years, many three-dimensional woven and knitted fabrics have been proposed for general clothing, sports clothing, and fiber reinforced composite materials. However, even if such a three-dimensional woven or knitted fabric maintains a uniform three-dimensional shape at the time of weaving or weaving, pressure or pressure is applied during higher-order processing such as resin impregnation processing or when used in the final product.
Since it receives a mechanical external force such as tension and bending, its three-dimensional shape becomes asymmetrical, and the three-dimensional effect disappears, which makes it difficult to obtain satisfactory clothing and composite materials.

[0003]

SUMMARY OF THE INVENTION Therefore, the present invention provides a bulky woven or knitted fabric capable of preventing a change in shape due to a complicated external force and maintaining an extremely uniform three-dimensionality.

[0004]

The present invention is intended to solve the above problems and has the following structure. That is, the present invention is a multilayer structure woven or knitted fabric in which a front surface fabric and a back surface fabric are connected by connecting yarns, and 10% by weight or more of the connecting yarns are composite yarns composed of high melting point yarns and low melting point yarns. The gist is a bulky woven or knitted fabric characterized by being present.

In the present invention, the high melting point yarn and the low melting point yarn used for the connecting yarn are distinguished by the relative melting point difference between the two yarns. For example, when nylon 6 is used as the low melting point yarn. Polyester yarn can be applied as a high melting point yarn. As another example, when glass fiber, aramid fiber or the like is used as a high melting point yarn, a polyester or nylon yarn becomes a low melting point yarn. Other yarns may be mixed in the combination of these high melting point yarns and low melting point yarns.

Typical examples of the form of the composite yarn composed of the high melting point yarn and the low melting point yarn are a twisted form of the two yarns, a mixed and entangled form, or a spun yarn mixed and spun. is there.

Further, the bulky woven or knitted fabric of the present invention comprises 10 of the above-mentioned composite yarns among the connecting yarns for connecting the front surface fabric and the back surface fabric.
If it is not contained in an amount of more than 1% by weight, the morphological stability of the woven or knitted fabric will be reduced and the three-dimensional effect will be impaired.

The bulky woven or knitted fabric of the present invention is not particularly limited in terms of the yarns constituting the above-mentioned front base fabric and back base fabric, and may be appropriately selected according to the application. For example, when a composite yarn used for connecting yarn is used, the entire woven or knitted fabric can be a resin-impregnated composite material.

The present invention will be described below with reference to the drawings.
FIG. 1 is a schematic perspective view of a bulky knitted fabric according to an example of the present invention,
FIG. 2 is a schematic cross-sectional view of the bulky knit shown in FIG.

1 and 2, the bulky knitted fabric (1)
Has a surface backing (2) consisting of a surface loop (4) formed from the surface thread (A) and a back side backing (3) consisting of a back loop (5) formed from the back thread (B) The front and back base fabrics (2) and (3) are connected by a connecting yarn (C) at a constant interval.

The connecting yarn (C) contains 10% by weight or more of a composite yarn of high melting point yarn and low melting point yarn in any part. In the higher-order processing of such a bulky knit, for example, by heat-treating at a temperature above the melting point of the low melting point yarn and below the melting point of the high melting point yarn, only the low melting point yarn is melted, and the high melting point yarns in the periphery are melted. Will be integrated with the article. As a result, a part of the connecting yarn (C) is resinified, and high tensile strength due to the high melting point yarn which is not melted and rigidity due to molten resin are added, so that the morphological stability of the entire knitted fabric becomes extremely excellent. In addition, various knitting performance can be obtained by appropriately changing the composition ratio of the low melting point yarn contained in the composite yarn, the weight ratio of the composite yarn in the knitted fabric, the heat treatment temperature, etc. Can handle.

Next, a production example of the bulky woven or knitted fabric according to the present invention will be described. FIG. 3 is a knitting action diagram for producing the bulky knitted fabric of FIG. 1 using a normal double circular knitting machine. In FIG. 3, at the first yarn feeder (F1), the back side base fabric is knitted by the dial long hand (DL) and the dial short hand (DS). At the second yarn feeder (F2), the surface base cloth is knitted by the cylinder long needle (CL) and the cylinder short needle (CS). Therefore, these back and front base fabrics are
They do not have direct contact with each other and are in a separated state. At the third yarn feeder (F3), tuck knitting is performed by the dial long needle (DL) and the cylinder long needle (CL) to connect the front and back base fabrics. Therefore, it is necessary that a part of the yarn supplied to the third yarn feeder (F3) is a composite yarn composed of a high melting point yarn and a low melting point yarn. Subsequently, the fourth yarn feeder (F4) and the fifth yarn feeder (F5) have the same knitting action as the first yarn feeder (F1) and the second yarn feeder (F2) respectively, and the sixth yarn feeder (F4) In F6), the yarn including the above composite yarn is tuck-knitted by the dial short needle (DS) and the cylinder short needle (CS) of the knitting needles different from the knitting needles knitted at the third yarn feeder (F3), and become a connecting yarn. . Also,
The first, second, fourth and fifth yarn feeders (F1, F2,
The yarns to be fed to F4 and F5) may be of any type and may be selected according to the application.

Next, among the bulky woven and knitted fabrics of the present invention, production examples of bulky fabrics will be described. FIG. 4 is a schematic longitudinal sectional view of a bulky fabric according to an example of the present invention, and FIG. 5 shows a weaving action diagram of the bulky fabric of FIG. That is, the surface backing fabric (11) has a plain weave design with the front warp (6) and the front weft (9), and the back backing fabric (12) has a plain weave design with the back warp (7) and the back weft (10). It is composed of. Further, the connecting yarn (8) is alternately woven with the front weft yarn (9) of the front face fabric (11) and the back weft yarn (10) of the back face fabric (12), and between the both base fabrics (11) and (12). It is connected.

An example of the weaving method of such a woven fabric will be explained. The front warp yarn (6) drawn from the front yarn beam (13) makes an opening movement by a heddle (not shown), and together with the front weft yarn (9). A surface base fabric (11) is formed. Similarly,
The back warp (7) drawn from the back yarn beam (14) is
The back weft (10) is crossed to form a backside backing fabric (12). The connecting yarn (8) including the above-mentioned composite yarn drawn out from the connecting yarn beam (15) passes through the middle of the warp yarns (6) and (7) on the front and back, and has a special opening of a heald (not shown) for the connecting yarn. The front base cloth (11) and the back base cloth (12) are alternately woven by movement, and the two base cloths are connected to each other. The bulky woven fabric of the present invention can be manufactured in this manner, and a velvet loom or the like which is generally commercially available may be used for such weaving.

[0015]

[Working] As in the present invention, in a multi-layer structure woven or knitted fabric in which a front surface fabric and a back surface fabric are connected by yarns, at least 10% by weight or more of the yarns connecting the front and back double-sided fabrics are high melting point yarns. When a composite yarn composed of low melting point yarns is used, the high melting point yarns are melted by heat treatment at a temperature higher than the melting point of the low melting point yarns and lower than the melting point of the high melting point yarns in the higher-order processing. It becomes a composite resin yarn. As a result,
It can exhibit strong rigidity, and the three-dimensional shape becomes extremely stable even when external force such as pressure or distortion is applied to the woven or knitted fabric.
Excellent compression elasticity is obtained.

[0016]

EXAMPLES Next, the present invention will be described in detail with reference to Examples. Example 1 Polyester multifilament 10 having a melting point of 255 ° C.
0d / 48f and 70d / 24f nylon multifilament having a melting point of 218 ° C are combined and the composite yarn obtained by entanglement treatment with a high-pressure air flow is used as the connecting yarn, and polyester multifilament yarn 150d / 30f is used as the surface fabric. Knitting machine gauge 20 needle / inch, yarn feed number 48 feed, cylinder diameter 30 inch, dial / cylinder gap 12 mm, knitting machine shown in FIG. The knitted fabric was knitted according to the action diagram, the obtained knitted fabric was dyed at a temperature of 120 ° C., and then heat-treated at 235 ° C. for 1 minute.

Cut the knitted fabric into 30 cm × 30 cm,
A load of 1 kg / 10 cm ² was placed on it for 30 minutes and left to stand. When the load was removed after 30 minutes, it immediately returned to its original shape.

[0018]

As described above, the bulky woven or knitted fabric according to the present invention has at least one of the yarns connecting the front and back base fabrics.
Since 0% by weight or more is composed of a composite yarn composed of high-melting-point yarn and low-melting-point yarn, for example, by heat-treating only the low-melting-point yarn to form the fusion-bonded resin portion,
An excellent highly elastic three-dimensional structure that can quickly return to its original shape can be obtained by removing these external forces even when subjected to compressive stress or complicated strain.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a bulky knitted fabric according to an example of the present invention.

FIG. 2 is a schematic cross-sectional view of a bulky knitted fabric according to an example of the present invention.

FIG. 3 is a knitting action diagram for producing a bulky knitted fabric according to an example of the present invention.

FIG. 4 is a schematic vertical sectional view of a bulky fabric according to an example of the present invention.

FIG. 5 is a weaving operation diagram for producing a bulky fabric according to an example of the present invention.

[Explanation of symbols]

 1 Bulky Knit 2 Front Base Fabric 3 Back Base Fabric 4 Front Loop 5 Back Loop 6 Front Warp 7 Back Warp 8 Connecting Thread 9 Front Weft 10 Back Weft 11 Front Back Fabric 12 Back Back Fabric 13 Front Thread Beam 14 Back Thread Beam 15 Connection Thread beam DL Dial long needle DS Dial short needle CL Cylinder long needle CS Cylinder short needle F1 to F6 Yarn feeder number A Front yarn B Back yarn C Connecting yarn

Claims (1)

[Claims] 1. A multi-layer structure woven or knitted fabric in which a front surface fabric and a back surface fabric are connected by connecting yarns, and 10% by weight or more of the connecting yarns are composite yarns composed of high melting point yarns and low melting point yarns. A bulky woven knitted fabric characterized by the above.