Process for producing homogeneous curly synthetic polymer fibers

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

1978-05-24

1980-12-23

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

With crimping or crinkling of strands of filaments

2642108, D01D 5088, D01D 512, D01D 522

Patent

active

042410029

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: 2604689 (1952-07-01), Hebeler
patent: 3053611 (1962-09-01), Griehl
patent: 3134833 (1964-05-01), Ciporin et al.
patent: 3379811 (1968-04-01), Hartmann et al.
patent: 3552114 (1971-01-01), Fukuhara et al.
patent: 3560604 (1971-02-01), Papps
patent: 3929542 (1975-12-01), Gehrig et al.
patent: 3979496 (1976-09-01), Schwarz
patent: 3991250 (1976-11-01), Hartmann et al.
patent: 4038357 (1977-07-01), Boyes et al.
patent: 4049763 (1977-09-01), Mineo et al.

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