Zip fasteners made of polyester monofilaments

Details Zip fasteners made of polyester monofilaments Zip fasteners made of polyester monofilaments

1975-07-15

1976-10-05

Kendell, Lorraine T.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

24201R, 24205R, 264210F, 428395, A44B 1900, D02G 300

Patent

active

039846008

ABSTRACT:
A zip fastener made of a monofilament of 200 to 20,000 denier composed of a polymethylene terephthalate containing at least 85 mole % of trimethylene terephthalate, tetramethylene terephthalate or hexamethylene terephthalate as a recurring unit, said monofilament having an intrinsic viscosity of 0.35 to 3.5 and a circularity of not more than 1.01. The monofilament is prepared by melt-extruding the polymethylene terephthalate in the form of a filament, passing the extruded filament through an air gap, passing it through a cooling bath of an inert quenching liquid held at a temperature of about 60.degree. to 100.degree.C., then passing it through a cooling zone at a temperature of below 35.degree.C., and then drawing the filament.

REFERENCES:
patent: 2465319 (1949-03-01), Whinfield
patent: 3069723 (1962-12-01), Porepp
patent: 3584103 (1971-06-01), Harris
patent: 3621088 (1971-11-01), Hatcher
patent: 3822334 (1974-07-01), Patterson

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