Abstract A process for making a yarn from a blend of staple fibers including at least some drawn polyethylene terephthalate fibers and at least some underdrawn higher shrinkage polyethylene terephthalate fibers, in which the underdrawn polyethylene terephthalate fibers have a length significantly shorter than the effective staple length of the blend. This process overcomes difficulties in spinning blends of staple fibers containing e.g., high shrinkage synthetic underdrawn polyethylene terephthalate fibers, particularly when the spinning is done on the cotton system and when nips of the feed and draft rollers in the spinning unit are spaced apart by a distance just above the effective staple fiber length of the blend.
Inventors
👤 Jack Thomson
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-09 04:00
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/18
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
16 words
The process of claim 1, wherein said yarn is spun on the short staple spinning system.
Claim 2
Dependent Claim
50 words
The process of claim 1, wherein from about 20 to about 50 percent (by weight) of said staple fiber blend is comprised of underdrawn higher-shrinkage poly(ethylene terephthalate) fibers with lengths no greater than from about 60 to about 80 percent of the effective fiber length of the staple fiber blend.
Claim 3
Dependent Claim
28 words
The process of claim 3, wherein said staple fiber blend is comprised of from about 25 to about 75 percent (by weight) of said drawn poly(ethylene terephthalate) fibers.
Claim 4
Dependent Claim
35 words
The process of claim 4, wherein said staple fiber blend is comprised of about 25 weight percent of said underdrawn higher-shrinkage poly(ethylene terephthalate) fibers and about 50 weight percent of said drawn poly(ethylene terephthalate) fibers.
Claim 5
Dependent Claim
25 words
The process of claim 3, wherein said staple fiber blend is comprised of from about 25 to about 50 weight percent of Viscose staple fibers.