Process for increasing void volume of hollow filaments

Details Process for increasing void volume of hollow filaments Process for increasing void volume of hollow filaments

1982-02-19

1984-04-24

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264234, 2642888, 2642893, 264345, D01D 524

Patent

active

044447108

ABSTRACT:
A process for increasing the percent void of hollow filaments by contacting the filaments with water at a temperature of at least about 92.degree. C. for at least about 3 seconds. It is necessary that the treatment be carried out while the filaments are in an amorphous condition. Preferred filaments are polyesters.

REFERENCES:
patent: 2578899 (1951-12-01), Pace
patent: 3030173 (1962-04-01), Kurzke et al.
patent: 3156607 (1964-11-01), Strachan
patent: 3426754 (1969-02-01), Bierenbaum et al.
patent: 3513110 (1970-05-01), Noether
patent: 3924988 (1975-12-01), Hodge
patent: 4290987 (1981-09-01), Soehngen et al.

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