Polyester fiber and process for producing same

Details Polyester fiber and process for producing same Polyester fiber and process for producing same

1981-06-22

1983-06-28

Phynes, Lucille M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528309, 5283081, 2642108, C08G 6302

Patent

active

043906850

ABSTRACT:
A polyester fiber highly suitable for a raw yarn for a woven or knitted fabric, having a residual elongation of not higher than 60%, a Young's modulus of 60 to 100 g/d, a boiling water shrinkage of 4 to 10% and a dry heat shrinkage of 5 to 12%, the peak stress temperature in a dry heat shrinkage stress curve of said fiber being lower than 100.degree. C. The fiber can be produced by a process comprising melt spinning a thermoplastic polyester through a spinneret into a filament and taking up the filament after solidifying the spun filamentary polymer, characterized in that the whole process from spinning through take-up is carried out without heating the filament, the filament is subjected to stretch treatment at a stretch ratio of not more than 20% after the solidification of the filament but before take-up, and take-up is carried out at a take-up speed of not less than 5,000 m/min.

REFERENCES:
patent: 3772872 (1973-11-01), Piazza et al.
patent: 4134882 (1979-01-01), Frankfort et al.

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