Process for homogeneous curly synthetic polymer fibers

Details Process for homogeneous curly synthetic polymer fibers Process for homogeneous curly synthetic polymer fibers

1980-07-31

1982-08-24

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264211, 524583, 524373, B28B 320

Patent

active

043460526

ABSTRACT:
Process and composition relating to novel, fine denier, homogeneous, curly synthetic fibers are set out. The process comprises orientation of a fiber-forming, slowly crystallizing, synthetic polymer composition in fiber form, generally after melt spinning, such orientation resulting from application of a longitudinal tensile force to said fiber above the crystallization temperature range and maintaining it at least through such range during a controlled, substantially axially symmetric cooling of the fiber. The novel fibers have a substantially axially symmetric, residual tensile force differential between their outer sheaths and inner portions, are generally of helical configuration and can exhibit more than about fifteen turns per linear centimeter.

REFERENCES:
patent: 3511824 (1970-05-01), Listner
patent: 3515687 (1970-06-01), Listner
patent: 3658634 (1972-04-01), Yanagi et al.
patent: 3666692 (1972-05-01), Paige et al.
patent: 3787506 (1974-01-01), Ungetug et al.
patent: 3883481 (1975-05-01), Kopetz et al.
"Stereochemical Configuration of PP by Hydrogen NMR" by Stebling et al. Macromolecules, 8 pp. 595-604, 3-1975.

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