Textiles: spinning – twisting – and twining – Strand structure – Covered or wrapped
Patent
1979-12-05
1981-04-28
Petrakes, John
Textiles: spinning, twisting, and twining
Strand structure
Covered or wrapped
57 12, 57230, 57254, 57255, 57253, D02G 324, D02G 304, D02G 336
Patent
active
042637775
ABSTRACT:
A roving formed from a first kind of staple fibers, each of which is at least 3 denier, is interposed with a randomly mixed sliver formed from a second kind of staple fibers, each of which is between 1.5 denier and 3 denier, and a third kind of staple fibers, each of which is at most 1.5 denier, the thermal shrinkage of the second kind of staple fibers being higher than that of the third kind of staple fibers. The roving and the randomly mixed sliver are twisted together so that the sliver wraps around the roving in order to form a double layered roving. After the double layered roving is subjected to fine spinning, it is then subjected to a heat treatment. As a result, a multi-layered bulky spun yarn is obtained.
REFERENCES:
patent: 3387450 (1968-06-01), Brown
patent: 3852948 (1974-12-01), Ruddell et al.
patent: 3965663 (1976-06-01), Goetti et al.
patent: 3994122 (1976-11-01), Shah
Murata Goro
Wada Osamu
Petrakes John
Teijin Limited
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