Crimped thermoplastic synthetic filaments of asymmetric composit

Details Crimped thermoplastic synthetic filaments of asymmetric composit Crimped thermoplastic synthetic filaments of asymmetric composit

1974-12-13

1976-05-04

Rimrodt, Louis K.

Textiles: spinning, twisting, and twining

Apparatus and processes

Elements

D02G 302

Patent

active

039539628

ABSTRACT:
Process and apparatus are disclosed for jettexturing yarn of continuous filaments to increase the bulk. Thermoplastic filaments are crimped by forwarding the yarn in a jetted stream of hot compressible fluid, such as heated air or steam onto a moving screen or other foraminous surface and cooling the yarn on the surface prior to imposing any substantial tension on the filaments. Products having especially desirable properties are obtained by treating filaments which develop crimp due to differential shrinkage properties when heat-relaxed, e.g., bicomponent filaments or meltspun filaments which have been quenched asymmetrically by directing cold fluid across the spinneret face.

REFERENCES:
patent: 2931091 (1960-04-01), Breen
patent: 3143784 (1964-08-01), Scott
patent: 3156028 (1964-11-01), Weiss et al.
patent: 3217386 (1965-11-01), Clendening

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