Process for production of crimpable chemical yarns

Details Process for production of crimpable chemical yarns Process for production of crimpable chemical yarns

1978-11-22

1981-01-27

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

With crimping or crinkling of strands of filaments

264171, 264176F, D01D 522

Patent

active

042475031

ABSTRACT:
The process of an apparatus for asymmetrically heat treating chemical yarns by applying different temperatures on either side of a plane passing through two generatrices of a peripheral surface of each orifice through which the yarns are extruded during production. One side of the plane is preferably at a temperature slightly higher than the melting point of the material and the other side of the plane is preferably at a temperature slightly lower than the decomposition point of the material.

REFERENCES:
patent: 3437725 (1969-04-01), Pierce
patent: 3904730 (1975-09-01), Shimizu et al.
patent: 4015963 (1977-04-01), Levesque et al.
patent: 4124673 (1978-11-01), Piper et al.
patent: 4187269 (1980-02-01), Hutchinson et al.

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