Process for sheath-core cospun heather yarns

Details Process for sheath-core cospun heather yarns Process for sheath-core cospun heather yarns

1974-02-15

1976-11-16

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

With incorporating dye susceptible material or dyeing workpiece

8 17, 8 30, 8100A, 8168B, 8168C, 57140BY, 264171, 428373, D01F 104, B29F 310

Patent

active

039924998

ABSTRACT:
In cospinning two fiber-forming polymers to produce a composite heather yarn from filaments of different dyeability, the apparent weight ratio of one polymer in the yarn can be varied by spinning only a portion of that polymer as a monocomponent filament and hiding the remainder as the core of a sheath-core filament having the other polymer as its sheath. Thus, a wide range of apparent weight ratios of the two polymers in the cospun yarn is provided, without changing the flow rate of the two polymer solutions fed to the spinneret.

REFERENCES:
patent: 3344472 (1967-10-01), Kibajima et al.

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