Yarns and process for production thereof

Details Yarns and process for production thereof Yarns and process for production thereof

1974-04-29

1976-07-06

Watkins, Donald E.

Textiles: spinning, twisting, and twining

Apparatus and processes

Elements

57 2, 57157R, 57157TS, 57157S, D02G 300, D02G 100, D01G 106, D01H 530

Patent

active

039674410

ABSTRACT:
A yarn comprising thermoplastic synthetic staple fibers or thermoplastic synthetic staple fibers and continuous filaments, in which the individual fibers constituting the yarn contain twisted crimps and having cross-sectional surfaces with a markedly flattened portion, in which the staple fibers contained therein have broken ends comprising mainly portions flattened to a lesser degree, a plurality of fibers having this structure uniformly and alternately forming the surface and inner layers of the yarn and being intertwined in a truly twisted state or in a substantially non-twisted state at fluffs formed of the broken ends of the individual fibers, and a process for producing a yarn which comprises drawing an undrawn yarn comprising multifilaments of a thermoplastic synthetic polymer and having substantially the same break elongation, in a twisted state at an elevated temperature thereby to remarkably flatten portions of the individual filaments which appear on the outer layer of the yarn, and immediately detwisting the yarn to break a part or all of those portions of the filaments which are flattened to a lesser degree, followed by taking up the yarn.

REFERENCES:
patent: 2092800 (1937-09-01), Dickie et al.
patent: 2432355 (1947-12-01), Truitt
patent: 2523854 (1950-09-01), Woods
patent: 2810281 (1957-10-01), Appleton et al.
patent: 3298169 (1967-01-01), Comer
patent: 3444682 (1969-05-01), Polacco et al.
patent: 3708970 (1973-01-01), MacFarlane
patent: 3745757 (1973-07-01), Selwood

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