Steam draw-jet process for making partially-oriented polyamide y

Details Steam draw-jet process for making partially-oriented polyamide y Steam draw-jet process for making partially-oriented polyamide y

1992-11-23

1994-02-08

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

26421115, 26421117, B29C 4788, D01D 512, D01D 1002, D02J 122

Patent

active

052846121

ABSTRACT:
A coupled process for making partially-oriented polyamide yarn. Polyamide polymer is melt-spun at a withdrawal speed sufficient to produce a spun yarn having an elongation less than 175%. The spun yarn is subsequently subjected to a coupled drawing step in a draw zone to reduce the elongation to the range of 50 to 100%. In the draw zone, the yarn passes through an enclosure with a gaseous fluid jet having a temperature of at least about 190.degree. C. which impinges on the yarn in an intersecting relationship to the path of yarn travel.

REFERENCES:
patent: 3452130 (1969-06-01), Pitzl
patent: 3452131 (1969-06-01), Geerdes et al.
patent: 4056652 (1977-11-01), Gauntt
patent: 4539170 (1985-09-01), Hare
patent: 5082611 (1992-01-01), Adams et al.

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