Bulky yarn and method for producing the same

Details Bulky yarn and method for producing the same Bulky yarn and method for producing the same

1978-02-15

1979-09-18

Gorenstein, Charles

Textiles: spinning, twisting, and twining

Strand structure

Multifilament yarns

57208, 57246, D02G 304, D02G 324, D02G 334

Patent

active

041678478

ABSTRACT:
Disclosed is a bulky yarn made from a thermoplastic multifilament yarn. Each of the individual filaments forming the yarn has a randomly varying thermal shrinkage along its length. The filaments in the cross-section of the yarn also have randomly varying thermal shrinkages. The bulky yarn forms a plurality of loops having a stable and compact configuration, while the number of filament slack portions which project outwardly from the yarn surface is significantly decreased.
A method for producing a bulky yarn possessing the above-mentioned construction is also disclosed. In the method, individual filaments forming the multifilament yarn are interlaced with each other, before or after which the yarn is subjected to a so-called random heat treatment. The interlaced and randomly heat-treated yarn is supplied at an over-feed condition to a fluid turbulent flow region which causes the individual filaments to form a plurality of loops and entanglements, and then the yarn is wound onto a package.

REFERENCES:
patent: 3593513 (1971-07-01), Reese
patent: 3622264 (1971-11-01), Brown et al.
patent: 3652198 (1972-03-01), Farber et al.
patent: 3846970 (1974-11-01), Hitomi et al.
patent: 3852948 (1974-12-01), Ruddell et al.

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