Process for spin-stretching of high strength technical yarns

Details Process for spin-stretching of high strength technical yarns Process for spin-stretching of high strength technical yarns

1983-06-06

1984-07-24

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

28245, 2642905, 425 66, D01D 508

Patent

active

044617402

ABSTRACT:
An improved process and apparatus for the spin-drawing of high-tenacity, technical-grade yarns is disclosed. The process and apparatus are particularly suitable for use with polyamide and polyester. High quality yarns having a low break elongation are obtained by maintaining the feed roll system at a constant temperature T.sub.E =(T.sub.G -20.degree. C.) to (T.sub.G +65.degree. C.), wherein T.sub.G is the temperature of the glass transition point. Filaments are passed over a roll system disposed between the feed roll system and the draw roll system and driven at a peripheral speed between that of the feed roll and draw roll systems. The filaments are passed over the roll system a maximum of three turns.

REFERENCES:
patent: 3715421 (1973-02-01), Martin et al.
patent: 3745151 (1973-07-01), Takeda et al.
patent: 3936253 (1976-02-01), Fisher et al.
patent: 4042662 (1977-08-01), Corbin et al.
patent: 4096226 (1978-06-01), Martin et al.

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