Yarn product and process

Details Yarn product and process Yarn product and process

1977-10-14

1979-05-22

Watkins, Donald

Textiles: spinning, twisting, and twining

Strand structure

Multifilament yarns

57282, D02G 102, D02G 304

Patent

active

041552148

ABSTRACT:
A twist-free texturing feed yarn of drawn thermoplastic filaments is prepared from a bundle (A) of filaments having a melting point of 255.degree. to 275.degree. C. and a bundle (B) of filaments having a melting point above 230.degree. C. which is 15.degree. to 39.degree. C. lower than that of the filaments of bundle (A). The bundles differ in coloration or affinity for dyestuffs. The feed yarn is false-twist textured at a temperature 53.degree. to 78.degree. C. lower than the melting point of the filaments of bundle (A) to produce a textured yarn which provides a heather of high contrast and low directionality (no color streaks) in fabric made from the yarn. Filament compositions illustrated are poly(ethylene terephthalate) or poly[ethylene terephthalate/5-(sodium sulfo)isophthalate] or poly(hexamethylene adipamide) for bundle (A); and poly(ethylene terephthalate/glutarate) or poly(ethylene terephthalate/adipate) or poly(ethylene/2,2-dimethyl-1,3-propylene terephthalate) for bundle (B).

REFERENCES:
patent: 3593513 (1971-07-01), Reese
patent: 3874160 (1975-04-01), Kitazawa et al.
patent: 3998042 (1976-12-01), Reese
patent: 4025595 (1977-05-01), Mirhej
Chemiefusern/Textilindustrie, vol. 27/79, Feb. 1977, pp. 149-153, Fresco, N. Jour. & Jamm.

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