Crimped bicomponent-filament yarn with randomly reversing helica

Details Crimped bicomponent-filament yarn with randomly reversing helica Crimped bicomponent-filament yarn with randomly reversing helica

1977-05-11

1978-10-03

McCamish, Marion E.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

428371, 428373, 428374, 428397, D02G 300

Patent

active

041185340

ABSTRACT:
Crimped bicomponent-filament yarn is produced by spinning composite filaments of polyhexamethyleneadipamide and polyethylene terephthalate modified with 5-(sodium sulfo) isophthalate, with the two components side by side in oblong filament cross sections wherein the length of the major axis is 2.5 to 4.5 times the length of the minor axis and the polyhexamethyleneadipamide component occupies 20 to 35 percent of the total cross-sectional area, drawing the filaments about 3 .times. in about 200.degree. C steam, and crimping the filaments in a bulking jet with air or steam at about 280.degree. C. The composite filaments have a randomly reversing filament twist with an average of 60 to 120 crimps per inch (23.5 to 47 crimps/cm) of filament and, when the yarn is heated at about 100.degree. C in aqueous caustic solution, filament components split apart to form a yarn having crimped copolyester filaments surrounded by arched filaments of polyhexamethyleneadipamide.

REFERENCES:
patent: 3117906 (1964-01-01), Tanner
patent: 3917784 (1975-11-01), Nishida
patent: 4002795 (1977-01-01), Barbe

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