Polyester yarn production

Details Polyester yarn production Polyester yarn production

1974-11-07

1976-07-13

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Disparate treatment of article subsequent to working,...

Effecting temperature change

264176F, 264210F, B29C 2500

Patent

active

039694623

ABSTRACT:
A method and apparatus are disclosed for the production of a novel industrial polyester filament yarn of improved uniformity wherein a plurality of filaments are melt-spun into a heated zone coupled with controlled cooling. The yarn produced has improved long and short term Uster uniformity and improved uniformity of physical properties, particularly breaking strength, as shown by a reduced standard deviation of breaking strength. The yarn is produced by melt spinning into a heated zone which maintains the filaments molten for intervals below the spinneret face and subsequently quenching the filaments with a radial outflow of cooling gases, thereby producing a low birefringence yarn which is capable of being drawn at high draw ratios to high tenacities.

REFERENCES:
patent: 2847704 (1958-08-01), Scheers
patent: 3053611 (1962-09-01), Griehl
patent: 3135811 (1964-06-01), Barnett et al.
patent: 3361859 (1968-01-01), Cenzato
patent: 3705227 (1972-12-01), Fintel

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