Process for the production of a multifilament texturized yarn

Details Process for the production of a multifilament texturized yarn Process for the production of a multifilament texturized yarn

1974-07-16

1977-04-26

Woo, Jay H.

Textiles: spinning, twisting, and twining

Apparatus and processes

Elements

57157TS, 264103, 264143, 264171, 264210F, 428376, 428399, D02G 304, D01D 512

Patent

active

040193110

ABSTRACT:
A process for the production of a multifilament textured yarn by melt-spinning different polymers (for example a polyamide and a polyester) or copolymers (for example copolymers of nylon-6 and nylon-6,6) to form a highly preoriented multifilament yarn at substantially the same draw-off rate for all the constituent filaments of the yarn, followed by stretching under substantially the same stretching conditions for all the constituent filaments of the yarn, the stretching ratio lying above the elastic limit of at least one of the spun polymers and the preorientation of the freshly spun filaments being sufficient to provide a maximum stretching ratio available in the stretching stage of not more than 1:2.5, i.e. not more than 2.5 times the unstretched or spun length of filaments. Yarns are produced which may have the appearance of texturized continuous multifilament yarns or crimped staple fiber yarns.

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patent: 3840630 (1974-10-01), Yamada et al.
patent: 3846532 (1974-11-01), Kubitzker et al.
patent: 3857233 (1974-12-01), Cardinal et al.
B292,300, Jan. 1975, Reese.

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