Sheath-core cospun heather yarns

Textiles: spinning – twisting – and twining – Apparatus and processes – Elements

Patent

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Details

420373, D02G 304

Patent

active

040599493

ABSTRACT:
A composite yarn exhibiting heather dyeing capability is comprised of two groups of filaments composed of two differently dyeable polymers wherein filaments of one group are homofilaments of one polymer and filaments of the other group are of a substantially concentric sheath core structure with the sheath being of the other polymer and the core being of the same polymer as the homofilaments. The yarn dyes to give a heather appearance which is different from the appearance expected based on the polymer composition of the yarn.

REFERENCES:
patent: 3103732 (1963-09-01), Woodell
patent: 3593513 (1971-07-01), Reese
patent: 3604197 (1971-09-01), Sckiguchi et al.
patent: 3622264 (1971-11-01), Brown et al.

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