Yarns and fibers good properties, based on atactic polyvinyl chl

Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber

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428394, 2642108, 5263443, 5263442, B32B 2700, D02P 300, D01D 512

Patent

active

045087784

ABSTRACT:
The present invention relates to yarns and fibers based on atactic polyvinyl chloride. They possess a residual shrinkage in boiling water of less than 3%, a modulus of elasticity which is greater than or equal to 2 kN/mm.sup.2, an orientation index of the crystalline zones which is greater than or equal to 70%, an orientation index of the mesomorphic zones which is greater than or equal to 8%, and an orientation index of the amorphous zones which is greater than or equal to 5%. They are obtained by spinning and stretching in a known manner, then stabilization under tension at a temperature between 105.degree. and 130.degree. C., in the presence of steam under pressure, for 1 to 3 seconds, and then shrinkage in an aqueous fluid medium at a temperature between 98.degree. and 130.degree. C.

REFERENCES:
patent: 3380953 (1968-05-01), Fukushima
patent: 3444269 (1969-05-01), Beer
patent: 3673167 (1972-06-01), Ledoux et al.

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