JPH0734349A - Union fabric - Google Patents

Abstract

PURPOSE:To obtain an inexpensive union fabric high in breaking tensile strength, comprising high-strength, low-elongation yarns and low-strength, high-elongation yarns. CONSTITUTION:This union fabric is composed of (A) (1) high-strength, low- elongation yarns A and/or (2) twisted and/or wrapped union yarns composed of yarns A and low-strength, high-elongation yarns C and (B) low-strength, high-elongation yarns B. The yarns A have such a margin, compared to the yarn B, as to be expressed by the relationship: -1<=EB-EA-EC=Y<=2 EA is the tensile elongation of yarn A (%); EB is the tensile elongation of yarn B (%); EC is the proportion of the length of the recurring unit texture of this fabric to the tensile elongation of yarn B (%).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interwoven high-strength woven fabric which requires high tenacity such as industrial materials.

[0002]

2. Description of the Related Art As a method for obtaining high-strength yarn, for example, JP-A-3-205070 discloses a method for producing a gut. In this method, an aramid fiber and a low melting point nylon are wound around a core, an aramid fiber and a nylon are wound around the core material, and the outside is coated with a nylon resin. The feature of this method is to maximize the strength of the aramid fiber.

In this method, however, the strength of aramid fiber having a high strength yarn is fully utilized, but the strength of nylon having a low strength yarn is not fully utilized. That is, when the gut is cut, the aramid fiber having a low elongation is cut, and then the nylon is cut with a low strength and is not cut at the same time.
Therefore, the maximum strength is when the aramid fiber is cut.

Similarly, in the case of a woven fabric, when the low elongation high tenacity yarn and the high elongation low tenacity yarn are interwoven, the cutting elongations are different. Therefore, after the low elongation high tenacity yarn is cut, the high elongation low tenacity yarn is cut. Cuts out. In this case, they are not cut at the same time, so they cannot exert sufficient strength.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a woven fabric having a low elongation and high tenacity yarn and a high elongation and low tenacity yarn and having a high cutting tensile strength at a low cost.

[0006]

Means for Solving the Problems The present inventors have completed the present invention as a result of researching a method of simultaneously cutting a low-elongation, high-strength yarn and a high-elongation, low-strength yarn of a mixed woven fabric.

That is, the present invention is (a) low elongation and high tenacity yarn A and / or (b) low elongation and high tenacity yarn A and high elongation and low tenacity yarn C.
Mixed twisted yarn and / or wound yarn, and (c) high elongation and low strength yarn B
Is a woven fabric in which the low elongation and high tenacity yarn A is expressed by the following formula −1 ≦ EB-EA-EC = Y ≦ 2 (EA is the tensile elongation of the low elongation and high tenacity yarn A). Degree, unit (%), E
B is the tensile elongation of high elongation low tenacity yarn, unit (%), EC is the repeat unit of the fabric of low elongation high tenacity yarn A and high elongation low tenacity yarn B High elongation low tenacity of the length of the structure The ratio to yarn B and the unit (%) are shown. ) Is a woven fabric characterized by being woven in a state having a clear Y.

The low elongation and high tenacity yarns used in the present invention are generally used yarns having a tensile strength of 15 g / denier or more and a tensile elongation of 4% or less. The yarn may be filament or spun yarn. For example, there is para aromatic aramid. It is already commercially available under trademarks such as "Kevlar", "Twaron", and "Technora". There is also high-strength polyethylene,
It is already on the market under a trademark such as "Dyneema". Other examples include, but are not limited to, carbon fiber, glass fiber, metal fiber, polyarylate fiber, and the like.

The high-elongation, low-strength yarn used in the present invention may be a commonly used yarn, and has a minimum tensile elongation of 8% or more, generally 10% or more. The yarn may be filament or spun yarn. Further, natural fibers, synthetic fibers, regenerated fibers, or mixed spun yarns, mixed yarns, and twisted yarns thereof may be used.

In order to obtain the maximum tensile breaking strength by interlacing the low elongation high tenacity yarn A and the high elongation low tenacity yarn B used in the present invention, the low elongation high tenacity yarn A and the high elongation low tenacity yarn are used. It is necessary that B be cut at about the same time. Usually, when the low elongation and high tenacity yarn and the high elongation and low tenacity yarn are interwoven, the cutting elongation differs, so that the high elongation and low tenacity yarn is cut after the low elongation and tenacity yarn is cut. Since it is not cut at the same time, the fabric cannot exert sufficient strength.

In the present invention, a low elongation and high tenacity yarn A is used when weaving.
By interwoven in a state in which there is some space, the elongation at the time of cutting can be made uniform and the maximum strength of the interwoven fabric can be obtained.

The method of allowing the low elongation and high tenacity yarn A of the mixed woven fabric of the present invention to have a space is required for the low elongation and high tenacity yarn A which is separately warped during the interweaving with respect to the high elongation and low tenacity yarn B. Only obtained by overfeeding. However, although the warp yarns can be woven by this method, it is difficult to woven the weft yarns. Further, when the overfeed is large, the low elongation and high strength yarn A may float from the woven fabric.

In the production of the mixed woven fabric of the present invention, a method of allowing the low elongation / high strength yarn A itself to have a room is, for example, to wind the high elongation / low strength yarn C around the low elongation / high strength yarn A. There is a method (a method for producing a covering yarn), and a method in which a high elongation / low strength yarn C is twisted while overfeeding a low elongation / high strength yarn A. The twisting and winding are not limited to two yarns.

These yarns may be fabric yarns or dyed yarns. Further, if necessary, various finishing processes may be performed within a range not impairing the features of the present invention. Also,
The mixed woven fabric of the present invention may be subjected to dyeing and various finishing processes within a range not impairing the features of the present invention. These methods can be used in combination.

The structure of the interwoven fabric of the present invention is not particularly limited. The weave structure may be plain weave or twill weave. The number of low-elongation, high-strength yarns to be interwoven, denier (hereinafter abbreviated as "D"), the number of filaments (hereinafter abbreviated as "F"), and the like may be appropriately selected. As the number of low elongation and high tenacity yarns increases, the tenacity of the interwoven fabric increases. Also,
The larger the basis weight of the mixed woven fabric, the greater the tenacity.

The mixed woven fabric of the present invention comprises (a) a low-elongation, high-strength yarn A and / or (b) a low-elongation, high-strength yarn A and a high-elongation, low-strength yarn C, and / or a wound yarn. The yarn is woven from the (c) high-elongation, low-strength yarn B in such a state that it has a clearance as represented by the following formula.

-1≤EB-EA-EC≤2 (where EA is the tensile elongation of the low elongation high tenacity yarn A, unit (%), EB is the tensile elongation of the high elongation low tenacity yarn, unit) (%), EC represents the ratio, unit (%), of the length of the fabric unit structure of the low elongation high tenacity yarn A and the high elongation low tenacity yarn B based on the high elongation low tenacity yarn B.)

If this clearance exceeds 2%, or -1
If the percentage is less than%, the cutting time of the low elongation high tenacity yarn A and the high elongation low tenacity yarn B differ greatly, and sufficient maximum tenacity cannot be obtained for the woven fabric.

[0019]

EFFECTS OF THE INVENTION The mixed woven fabric of the present invention can provide a high-strength woven fabric at low cost by weaving an inexpensive high-elongation / low-strength yarn and a low-elongation / high-strength yarn.

[0020]

The present invention will be described in more detail with reference to the following examples. The tensile strength of the woven fabric was measured according to JISL 1096.

Example 1 40D / 24F polyester filament as a high elongation low strength yarn B and 375D / 2 as a low elongation high strength yarn A
A high elongation, low strength yarn B19 is obtained by a conventional method using a 50F para-aromatic aramid filament “Twaron” and a high elongation, low strength yarn C, a 70D / 24F polyester filament intertwisted yarn, and an upper twist number of 150 times / m. 1 warp yarn of low elongation and high tenacity yarn is warped to the book, 120 warps / 25mm,
70D / 24F polyester filament 15 in weft
0/25 mm was woven into a flat fabric that had been punched. As a contrast product, 430D / of high elongation and low strength yarn is used instead of the twisted yarn.
A 48F polyester filament was used. Table 1 shows the maximum tensile strength of the mixed twisted yarn in which the clearance Y of the mixed twisted yarn is changed by the overfeed amount of the low elongation and high strength yarn A, and Table 2 shows the tensile test results of the mixed woven plain weave manufactured using this mixed twisted yarn. It was shown to.

The tensile strength of the high elongation low strength yarn B is 5.5 g /
D, the tensile elongation was 33%. The high-elongation, low-strength yarn C had a tensile strength of 5.3 g / D and a tensile elongation of 36%. The low elongation and high tenacity yarn A had a tensile strength of 21 g / D and a tensile elongation of 3.5%.

[0023]

[Table 1]

[0024]

[Table 2]

Example 2 40D / 24F polyester filament as high elongation low strength yarn B and 375D / 25 as low elongation high strength yarn A
0F para-aromatic aramid filament "Twaron"
Using a covering yarn wound around a polyester filament of 70D / 24F as the high-elongation low-strength yarn C, a high-strength low-strength yarn B 19 yarns and a low-extension high-strength yarn covering yarn 1 are warped by a conventional method. 120 warp yarns / 25mm and weft yarns 70D / 24F polyester filament 150
Book / 25 mm, weaved into a plain weave. As a reference, instead of covering yarn, 430 of high elongation and low strength yarn is used.
D / 48F polyester filament was used.

The covering yarn has a low clearance and a high tenacity yarn A.
The tensile test result of the interwoven plain weave fabric of the present invention produced by using the covering yarn adjusted to 1% by the number of windings is 58.3 kg /
cm was excellent.

Example 3 Intertwisted yarn Nos. Produced in Examples 1 and 2 The tensile test result of the interwoven plain weave fabric of the invention in which 2 and the covering yarn were alternately driven instead of the interlaced yarn of Example 1 was excellent at 59.9 kg / cm.

Claims (1)

[Claims] 1. (a) Low elongation and high tenacity yarn A and / or
(B) A woven fabric in which a twisted yarn and / or a wound yarn of a low elongation / high strength yarn A and a high elongation / low strength yarn C and (c) a high elongation / low strength yarn B are woven, The high-strength yarn A has a higher elongation and a lower tenacity yarn B than the following formula: −1 ≦ EB-EA-EC = Y ≦ 2 (EA is the tensile elongation of the low-elongation high-strength yarn A, the unit (%), E
B is the tensile elongation of high elongation low tenacity yarn, unit (%), EC is the repeat unit of the fabric of low elongation high tenacity yarn A and high elongation low tenacity yarn B High elongation low tenacity of the length of the structure The ratio to yarn B and the unit (%) are shown. ) A woven fabric characterized by being interwoven in a state having a clear Y as represented by).