Textured polyethylene terephthalate yarns

Details Textured polyethylene terephthalate yarns Textured polyethylene terephthalate yarns

1974-08-01

1976-06-08

Petrakes, John

Textiles: spinning, twisting, and twining

Apparatus and processes

Elements

428397, 428399, D02G 334, D02G 324, D02G 100

Patent

active

RE0288438

ABSTRACT:
Textile articles comprise continuous filament yarns (or staple fibers obtained therefrom) of polyethylene terephthalate or another thermoplastic material, in which the individual filaments are of alternately decreasing and increasing thickness, the thinnest zones having the highest crystallinity index and molecular orientation and vice versa, but all the zones having a certain index of crystallinity, each filament having a non-spiral three dimensional crimp and a high apparent volume. The yarns are made by partially stretching the initial yarn in a crack or figure promoting agent, and relaxing the stretched yarn in two or more stages, in at least the last of which it is heated, preferably with a high temperature-time gradient.

REFERENCES:
patent: 3052268 (1962-09-01), Seney et al.
patent: 3069726 (1962-12-01), Adams
patent: 3115437 (1963-12-01), Adams
patent: 3116197 (1963-12-01), Kasey, Jr.
patent: 3117173 (1964-01-01), Adams
patent: 3127915 (1964-04-01), Bottomley
patent: 3184369 (1965-05-01), Haseley
patent: 3185613 (1965-05-01), Adams
patent: 3444682 (1969-05-01), Polacco et al.

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