Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Patent
1998-06-02
1999-05-25
Edwards, Newton
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
428395, 26417218, D02G 300, B29C 4706
Patent
active
059068914
ABSTRACT:
An oriented polyamide fiber which comprises at least 20% by weight of a crystalline polyamide copolymer (A) produced by polymerizing at least one diamine monomer containing at least 70 mol % m-xylylenediamine and at least one dicarboxylic acid monomer containing at least 70 mol % adipic acid. The oriented polyamide fiber having a Young's modulus of at least 400 kgf/mm.sup.2, a loop strength of at least 4.5 gf/D, a knot tensile strength of at least 3.5 gf/D and a roundness of from 97 to 100%. A process for producing the oriented polyamide fiber which comprises melting a polyamide resin comprising the crystalline polyamide copolymer (A); spinning the molten resin through a spinneret; pulling the spun product into a coolant bath disposed beneath the face of the spinneret to produce non-oriented fiber to a draw ratio of 2.5 to 8.0 at a temperature not lower than the Tg of the polyamide and not higher than the melting point of the polyamide, wherein the draft ratio is 1.0 to 3.0, and the temperature of the coolant bath (T) satisfies the relational expression: Tg-30.ltoreq.T.ltoreq.Tg+10 (.degree.C.). The oriented polyamide fiber can be used in sporting goods and industrial materials such as strings for a racket, rubber reinforcing materials and filter cloth materials for paper making, by virtue of its high strength, modulus of elasticity and roundness.
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Derwent Publications Ltd., London, GB, AN 94-364092, Oct. 11, 1994 of JP 6287807, Mitsubishi Gas Chem. Co.
Harada Masahiro
Shida Takatoshi
Takahashi Makoto
Edwards Newton
Mitsubishi Gas Chemical Company Inc.
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