Process for nylon 66 yarn having a soft hand

Details Process for nylon 66 yarn having a soft hand Process for nylon 66 yarn having a soft hand

1978-04-21

1980-10-14

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Disparate treatment of article subsequent to working,...

Effecting temperature change

264176F, 2642105, B29C 2500

Patent

active

042281202

ABSTRACT:
Nylon 66 yarn having particular stress-strain properties, typically also having a soft, luxuriant hand in fabric form. As compared to conventional nylon 66 with comparable boiling water shrinkage, the novel yarn exhibits a higher modulus at break, a lower modulus at 10% elongation, a positive stress index, and excellent denier uniformity. The process involves subjecting the yarn, within 0.016 to 0.11 seconds after solidification of the filaments, to a tension of 0.2 and 1.5 grams per final denier and heating the yarn to a temperature between 50.degree. and 250.degree. C. long enough to reduce yarn retraction below 1%.

REFERENCES:
patent: 3553305 (1971-01-01), Au
patent: 3946100 (1976-03-01), Davis et al.
patent: 4123492 (1978-10-01), McNamara et al.

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