Claims
- 1. An interlaced multifilament draw-warping feed yarn consisting essentially of spin-oriented poly[ethylene terephthalate/5-sodium-sulfo-isophthalate] copolyester filaments containing about 2 mole % of ethylene 5-sodium-sulfo-isophthalate repeat units, being of denier about 40 to about 300, having an average interlace level of about 5.5 to about 9.5 RPC, and being provided with a finish that is stable enough to persist on such yarn after draw-warping in sufficient quantity and in such condition as to provide finish to enhance knitting performance.
- 2. A feed yarn according to claim 1, wherein the average interlace level is about 5.5 to about 7.5 RPC.
- 3. A feed yarn according to claim 1 or 2, wherein the spin-oriented filaments have been obtained by spinning at a withdrawal speed of less than about 3000 ypm.
- 4. A process for preparing a flat multifilament interlaced textile yarn consisting essentially of poly[ethylene terephthalate/5-sodium-sulfoisophthalate]copolyester filaments containing about 2 mole % of ethylene 5-sodium-sulfo-isophthalate repeat units, being of denier about 20 to about 150 and having a tenacity of about 1.5 to about 2.5 grams per denier and elongation to break of about 10 to about 50%, and boil-off shrinkage about 2 to about 10%, by first forming by high-speed spinning an interlaced multifilament draw-warping feed yarn of elongation about 80% to about 180% and of boil-off shrinkage at least about 40% according to claim 1 or 2, and then draw-warping said feed yarn to reduce the elongation to about 10% to about 50% and the shrinkage to about 2% to about 10%.
CROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of application Ser. No. 07/207,077, filed June 14, 1988, now abandoned, which is itself a continuation-in-part of application Ser. No. 07/053,308, filed May 22, 1987, now abandoned.
US Referenced Citations (10)
Continuation in Parts (2)
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Number |
Date |
Country |
Parent |
207077 |
Jun 1988 |
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Parent |
53308 |
May 1987 |
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