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Reinforcing composite yarn and production method thereof

A technology of reinforced composite and composite yarn, which is applied in yarn, textile and papermaking, etc., can solve the problems of unreachable and high reinforcement effect, and achieve the effect of excellent reinforcement effect

Inactive Publication Date: 2007-11-07
TEIJIN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the fibers forming the yarn are short-length fibers made by pulling continuous filaments, the high reinforcement effect expected from the mechanical strength (tensile strength) of the original filaments cannot be achieved

Method used

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  • Reinforcing composite yarn and production method thereof
  • Reinforcing composite yarn and production method thereof
  • Reinforcing composite yarn and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0080] In each of Examples 1 to 3, 4 parallel aromatic copolyamide filament yarns, each consisting of 25 mol% p-phenylenediamine component, 25 mol% 3,4'-diaminobiphenyl ether component and 50mol% terephthalic acid component (trade name: TECHNORA, manufactured by TEIJIN company, and each has a tensile strength of 24.7cN / dtex, an initial modulus of 520cN / dtex, a final elongation of 4.6%, and 440 dtex / 267 yarn counts of silk), fed into the equipment shown in Figure 1, the monofilament in the multifilament yarn is broken according to the stretch ratio shown in Table 1, and the stretch cut made The fiber yarn (staple yarn) was paralleled with the same aramid multifilament yarn (440 dtex / 267 filaments) as mentioned above on the equipment shown in Figure 1, resulting in a parallel alignment of the precursors composite yarn. At the exit of the breaking roll 4, the produced sliver has an average staple length L and comprises a staple fraction (1) with a staple length of 1.5L or higher...

Embodiment 4 and 5

[0082] In each of Examples 4 and 5, the composite yarn was produced according to the same procedure as in Example 1, except that the draw ratio in the breaking procedure was changed to the values ​​shown in Table 1 and, as prepared and stretched staple fiber The multifilament yarn of yarn doubling adopts an aromatic copolyamide multifilament yarn (trade name: TECHNORA, manufactured by TEIJIN Corporation, and has a tensile strength of 24.7cN / dtex, an initial modulus of 520cN / dtex, 4.6% and a yarn count of 220 dtex / 133 filaments).

[0083] The results are shown in Table 1.

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Abstract

A composite yarn, having a high reinforcing effect on a matrix to be reinforced, is a paralleled composite yarn comprising at least one practically non-twisted multi-filament yarn having a tensile strength of at least 13 cN / dtex and an initial modulus of at least 300 cN / dtex, and at least one practically non-twisted short fiber yarn containing at least 15 mass% respectively of a fraction (1) having a fiber length at least 1.5 times the average fiber length and a fraction (2) having a fiber length up to 0.5 times, wherein part of short fibers in the short fiber yarn are wound on the surface of the paralleled composite yarn to bind the multi-filament yarn and the short fiber yarn together while kept practically non-twisted.

Description

technical field [0001] The present invention relates to reinforced (used) composite yarn and its production method. More particularly, the present invention relates to a reinforced composite yarn consisting essentially of a substantially untwisted composite yarn comprising a high mechanical strength and high modulus of elasticity multifilament yarn and a staple fiber yarn comprising fiber lengths Staple fibers different from each other, in which a part of the staple fiber exists in the form of being wound around a composite yarn so as to bind the composite yarn, and a method for producing the composite yarn. [0002] The reinforced composite yarns of the present invention exhibit excellent reinforcement effects on a wide variety of matrix resins. Background technique [0003] Functional fibers with high mechanical strength, high elastic modulus, and high heat resistance, for example, para-aramid fibers, are widely used in industrial practice as resin composites containing r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D02G3/36D02G3/04D02G3/44
CPCD02G3/447D02G3/44
Inventor 泷上康太郎
Owner TEIJIN LTD