Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Patent
1986-02-20
1987-10-20
Kendell, Lorraine T.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
2642107, 2642108, D02G 300
Patent
active
047013770
ABSTRACT:
A polyamide fiber excellent in strength, which comprises at least one of polycapramide, polyhexamethylene adipamide and polytetramethylene adipamide in an amount of not less than 60% by weight on the basis of the polyamide fiber and which is characterized by having a relative viscosity of not less than 2.3 and less than 3.5 (measured on a 96% by weight sulfuric acid solution having a polyamide concentration of 10 mg/ml at 20.degree. C.), an index of birefringence (.DELTA.n) (measured after 24 hours under the conditions of 30.degree. C. and 80% relative humidity) of not less than 55.times.10.sup.-3 and a tenacity of not less than 12.0 g/d, the index of birefringence in section satisfying the following relationship:
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patent: 3382307 (1968-05-01), Ciceri et al.
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patent: 3946094 (1976-03-01), Kanetsuna et al.
patent: 4369155 (1983-01-01), Schilo et al.
Ishihara Hideaki
Kurita Kazuo
Kendell Lorraine T.
Toyo Boseki Kabushiki Kaisha
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