JPH058337A - Durable composite fabric - Google Patents

Abstract

PURPOSE:To obtain a composite fabric being lightweight and high tenacity and having high tear tenacity and durability by making the height of a high tenacity and low elongation fiber (a fiber A) on the surface of a fabric lower than the height of a regular tenacity and high elongation fiber (a Fiber B) and making the tenacity of a yarn of the fiber A larger than the tenacity of a yarn of the fiber B. CONSTITUTION:A fiber A has a fiber strength of at least 10g/d, pref. at least 20g/d and a fiber B has a fiber strength of 3-10g/d, pref. 5-7g/d. When the height of the fiber A 1 is lower than the height of the fiber B 2 and a fabric is made a composite with a resin, the resin 4 is sufficiently compounded to a part wherein the height of the fiber A 1 is lower than the height of the fiber B 2 and weatherability and wear resistance are improved as the whole composite fabric and crease-flex resistance and durability of tear tenacity are made higher and the surface of the composite fabric becomes smooth.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high tear strength durable composite fabric used as an air film material for air-veters, rubber boats, canoe, hovercraft, tents, balloons and the like. .

In particular, a durable composite for air-veta, which is an airtight body formed in a bellows shape, a part of which is joined to a compressed gas injecting / discharging device and can move up and down by injecting and discharging compressed gas. It is suitable for use as a cloth.

[0003]

2. Description of the Related Art Generally, a composite cloth made of a resin and a fiber cloth is used for various purposes such as tents, containers, balloons, etc., but it is a lightweight, high-strength, and high tear-strength durable composite cloth. Has not been obtained. For example, a so-called ripstop type, in which a thick polyester filament yarn is arranged on a base fabric made of polyester filament, is known. However, when the yarn of the lip part is compounded with blistering resin, head breakage easily occurs and waterproofing is performed. Durability and airtightness are insufficient, and if the amount of resin is increased to improve waterproofness and airtightness durability, lightness is lost.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems. That is, it is an object of the present invention to provide a composite fabric that is lightweight, has high strength, and has high tear strength and durability.

[0005]

That is, the present invention provides a composite fabric in which a resin is mixed with a woven fabric composed of high-strength and low-elongation fibers (A fibers) and ordinary high-strength and high-strength fibers (B fibers). It is a durable composite fabric characterized in that the height of the fibers is lower than the height of the B fibers, and the strength of the A fiber yarns is higher than that of the B fiber yarns ".

The high strength and low elongation fiber (A fiber) means a fiber strength of 10 g / d or more, preferably 20 g / d.
That is all. Specific examples include para-aromatic polyamide fibers (para-aramid fibers), carbon fibers, glass fibers, high-strength polyethylene fibers, and high-strength polyester fibers.

Ordinary strength and high elongation fibers (B fibers) are those having a fiber strength of 3 to 10 g / d, preferably 5 to 7 g / d. Specifically, it is polyester fiber, polyamide fiber, polyvinyl alcohol fiber, polyethylene fiber, polypropylene fiber, or the like.

The height of the A fibers on the surface of the fabric being lower than the height of the B fibers means that the height of the A fibers is lower than the height of the B fibers on the surface of the woven fabric. This will be explained with reference to the drawing.

1 to 3 are side sectional views of the woven fabric.
3 to 3, 1 is a warp made of A fiber, 2 is a warp made of B fiber, 3 is a weft, 4 is a resin, and 5 is a portion where the height of the A fiber is lower than the height of the B fiber.

FIG. 1 shows an example of the present invention, in which the height of the A fiber is lower than the height of the B fiber. When the height of the A fiber is lower than the height of the B fiber, when the resin is compounded into the woven fabric, the resin is sufficiently compounded in the portion where the height of the A fiber is lower than the height of the B fiber, and the composite cloth As a whole, weather resistance and abrasion resistance are improved, kneading resistance and tear strength are increased, and the surface of the composite fabric is smooth.

FIG. 2 shows an example in which the height of the A fiber is the same as the height of the B fiber. In general, the high-strength low-elongation fiber (A fiber) has a low heat shrinkage rate, usually about 1% or less at 150 ° C, and the high-strength high-elongation fiber (B fiber) has a high heat shrinkage rate. It is 3% or more at 150 ° C. Therefore, if the height of the A fiber is the same as the height of the B fiber, the B fiber shrinks when subjected to heat treatment in the manufacturing process of the composite fabric.
As a result of the bulging of the fibers, a portion where the height of the A fibers is higher than the height of the B fibers is generated, and a state in which the surface of the A fibers is not covered with the resin occurs (this is called a head cut).
Even if the head is not cut off, the coating thickness of the resin becomes small and wear resistance decreases. FIG. 3 shows an example in which the height of the A fiber is higher than that of the B fiber. In this case, the height of the A fibers is higher than that of the B fibers, the fibers are completely cut off, and it is not possible to obtain a composite fabric having high durability with respect to weather resistance, abrasion resistance, and tear strength.

In order to make the height of the A fiber lower than that of the B fiber, the total fineness of the A fiber may be made smaller than the total fineness of the B fiber, but the A fibers are aligned without twisting. The A fiber yarn may be flattened, the B fiber may be twisted, and the B fiber yarn may be rounded to be woven.

The strength of the A fiber yarn must be higher than that of the B fiber yarn. Desirably, the strength of the A fiber yarn is higher than 1.5 times that of the B fiber yarn.

This is necessary to maintain the strength of the composite fabric.

[0015]

INDUSTRIAL APPLICABILITY The present invention was obtained by making the height of A fibers lower than the height of B fibers on the surface of a fabric and making the strength of the fiber yarn higher than that of the B fiber yarn. Prevents the A fibers of the composite fabric from being cut off, thereby
This is a composite fabric with improved weather resistance, abrasion resistance, rubbing resistance, and tear strength. Hereinafter, the present invention will be specifically described with reference to examples.

[0016]

Example 1 As high-strength, low-elongation fiber (A fiber), 20
0d / 133fil, strength 28g / d, elongation 4%, 18
Para-aramid fiber (Technora; manufactured by Teijin Ltd.) having a heat shrinkage rate of 0.1% at 0 ° C. was used, and as a normal high-strength fiber (B fiber), 250 d / 48 fil, strength 8 g /
d, Elongation 20%, Polyester fiber (manufactured by Teijin Ltd.) having a heat shrinkage rate of 5% at 180 ° C., both warp and weave densities are 55 / inch, and the ratio of A fiber and B fiber is 2:18.
(2 A fibers and 18 B fibers are alternately arranged) and woven. Polyvinyl chloride (Valka Bond) on the obtained base cloth
After pre-treatment and adhesion treatment with a water-repellent film, a waterproof film made of a blend of 85% by weight of polyvinyl chloride and 15% by weight of ethylene / vinyl acetate copolymer is laminated to have an average thickness of 0. An airtight film material of 30 mm was obtained.

The obtained airtight membrane material has a tear strength of 12 k.
g, tensile strength 160 kg / 3 cm, tear strength after sunshine weather meter 2000 hours 11.5 kg, tensile strength 158 kg / 3 cm, rubbing resistance was 1 kg, and there was no abnormality after 1000 times.

[0018]

[Comparative Example 1] As a high-strength, low-elongation fiber (A fiber), a para-aramid having 200d / 133fil of Example 1, a strength of 28g / d, an elongation of 4%, and a heat shrinkage rate of 0.1% at 180 ° C. Fiber (Technora; manufactured by Teijin Limited) x 2 (400d /
266fil), and generally high strength and high elongation fiber (B fiber)
As the weaving, using the polyester fiber of Example 1, the warp and weft densities are both 55 fibers / inch and the ratio of A fiber and B fiber is 1:18 (one A fiber and 18 B fibers are alternately arranged). did. The base fabric thus obtained was subjected to a pretreatment adhesion treatment with polyvinyl chloride (Valka Bond), and then a waterproof film composed of a blend of 85% by weight of polyvinyl chloride and 15% by weight of an ethylene / vinyl acetate copolymer. Was laminated to obtain an airtight film material having an average thickness of 0.32 mm.

The airtight membrane material obtained had a tear strength of 16 kg,
Although the tensile strength was 155 kg / 3 cm, the tear strength after 500 hours after sunshine weather meter was as low as 6 kg, and the result of the evaluation of rubbing resistance was breakage after 300 times at 1 kg.

[0020]

[Comparative Example 2] The ordinary tenacity and high elongation fiber of Example 1 was used as the ground yarn, and 500d / 96fil, strength 8g / d, elongation 18
% Was used for the lip portion, and 20 plain yarns were woven into a plain weave at a ratio of 1 lip portion. The obtained base cloth was laminated with a waterproof film composed of a blend of 85% by weight of polyvinyl chloride and 15% by weight of ethylene / vinyl acetate copolymer to obtain an airtightness of 0.30 mm in average thickness. A film material was obtained.

The obtained airtight membrane material has a tear strength of 11 kg,
Although the tensile strength was 165 kg / 3 cm, the result of the evaluation of the rubbing resistance was that the resin was broken at the lip portion after 500 times at 1 kg.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention.

FIG. 2 is a side sectional view showing an embodiment of a comparative example.

FIG. 3 is a side sectional view showing an embodiment of a comparative example.

[Explanation of symbols]

 1 Warp made of A fiber 2 Warp made of B fiber 3 Weft 4 Resin 5 A part where the height of A fiber is lower than the height of B fiber

Claims (1)

Claim: What is claimed is: 1. A composite fabric comprising a woven fabric comprising a high-strength low-elongation fiber (A fiber) and a normal-strength high-elongation fiber (B fiber) and a resin, the A-fiber on the surface of the fabric. A durable composite fabric characterized in that the strength of the A fiber yarn is higher than that of the B fiber yarn, and the strength of the A fiber yarn is higher than that of the B fiber yarn.