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Para-type wholly aromatic copolyamide drawn fiber and production method therefor

A fully aromatic, copolyamide technology, applied in the direction of single-component copolyamide rayon, stretch spinning, fiber chemical characteristics, etc., can solve the problem of reducing the number of single filaments, reducing fiber quality, and stretching elasticity of fiber bundles The modulus cannot be greatly improved, etc., and achieves the effects of excellent tensile elastic modulus, suppression of decrease in creep properties, and suppression of decrease in tensile strength

Active Publication Date: 2015-02-11
TEIJIN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in these methods, a very high tension is applied for heat treatment, so a part of the monofilament constituting the fiber is broken, not only the quality of the fiber is remarkably reduced, but also the number of monofilaments effective for expressing the tensile elastic modulus is reduced, and as a result, The tensile modulus of fiber bundles cannot be greatly improved, and at present, a sufficiently satisfactory tensile modulus cannot be achieved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0112] Hereinafter, although an Example etc. are used and this invention is demonstrated more concretely, this invention is not limited to these Examples unless the gist is exceeded.

[0113]

[0114] In Examples and Comparative Examples, the following items were measured and evaluated by the following methods.

[0115] (1) The fineness of the para-type fully aromatic copolyamide raw material fiber

[0116] The obtained fiber bundle was wound up for 100 m using a known ruler, and its mass was measured. The value obtained by multiplying the obtained mass by 100 was calculated as the mass per 10000 m, that is, fineness (dtex).

[0117] (2) Breaking tension of para-type wholly aromatic copolyamide raw material fibers

[0118] Using a tensile testing machine (manufactured by INSTRON Corporation, trade name: INSTRON, type: 5565 type), using a chuck (chuck) for yarn testing, the measurement was carried out under the following conditions;

[0119] [measurement conditions]

...

Embodiment 2

[0172] [Manufacture of para-type wholly aromatic copolyamide raw material fiber]

[0173] A para-type wholly aromatic copolyamide raw material fiber was produced in the same manner as in Example 1 except that the number of holes in the spinneret in the spinning-coagulation step was set to 133. The breaking tension of the obtained para-type wholly aromatic copolyamide raw material fiber was 4400 cN.

[0174] [Manufacture of para-type wholly aromatic copolyamide drawn fiber]

[0175] Except that the tension in the high tension hot drawing process is set to 700cN (relative to the breaking tension of the para-type wholly aromatic copolyamide raw material fiber is 16%), the para-position all-aromatic copolyamide is obtained by the same method as in Example 1. Aramid copolyamide drawn fiber. Table 1 shows various physical properties of the obtained para-type wholly aromatic copolyamide drawn fiber.

Embodiment 3

[0177] [Manufacture of para-type wholly aromatic copolyamide raw material fiber]

[0178] A para-type wholly aromatic copolyamide raw material fiber was produced in the same manner as in Example 1 except that the number of holes in the spinneret in the spinning-coagulation step was set to 48. The breaking tension of the obtained para-type wholly aromatic copolyamide raw material fiber was 2600 cN.

[0179] [Manufacture of para-type wholly aromatic copolyamide drawn fiber]

[0180] Except that the tension in the high-tension hot drawing process is set to 350cN (13% relative to the breaking tension of the para-type wholly aromatic copolyamide raw material fiber), the para-position fully aromatic copolyamide is obtained by the same method as in Example 1. Aramid copolyamide drawn fiber. Table 1 shows various physical properties of the obtained para-type wholly aromatic copolyamide drawn fiber.

[0181]

[0182] A para-type wholly aromatic copolyamide drawn fiber (ie, the ...

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Abstract

Provided is a para-type wholly aromatic copolyamide drawn fiber of which the tensile modulus of elasticity is 630 cN / dtex or higher. The drawn fiber is obtained by carrying out high-tension thermal drawing of a para-type wholly aromatic copolyamide fiber raw material within a specified tension and temperature range.

Description

technical field [0001] The present invention relates to a para-type (para-type) wholly aromatic copolyamide fiber and a manufacturing method thereof. More specifically, it relates to a para-type wholly aromatic copolyamide fiber having a high tensile elastic modulus and a method for producing the same. Background technique [0002] In the past, para-type wholly aromatic copolyamide fibers formed mainly from aromatic dicarboxylic acid components and aromatic diamine components have high strength, high tensile elastic modulus, low creep (creep), high Because of its heat resistance and high chemical resistance, it is used in various industrial materials such as resin and rubber, and various industrial materials such as ropes. Therefore, these industrial materials are also being used in a more severe environment such as high temperature, and further improvements in physical properties and characteristics of para-type wholly aromatic copolyamide fibers are expected. [0003] Su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/80C08G69/32
CPCD01F6/605C08G69/32C08G69/40D01D5/06C08G69/265D01D5/12D02J1/224D01F6/805D01F6/80D10B2401/063
Inventor 栗野透小宫直也
Owner TEIJIN LTD
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