Zip fasteners made of polyester monofilaments

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

D - Textiles, Paper

01

F

18/622

D01F 6/62 (2006.01) A44B 19/12 (2006.01)

Patent

CA 1056569

ABSTRACT OF THE DISCLOSURE A monofilament for use in a zip fastener characterized in that said monofilament has a denier size of 200 to 20,000, an intrinsic viscosity of 0,35 to 3.5 a circularity of not more than 1.01 and is composed of a poly- methylene terephthalate containing at least 85 mole % of trimethylene tere- phthalate, tetramethylene terephthalate or hexamethylene terephthalate as a recurring unit. The monofilament is prepared by melt-extruding the poly- methylene 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 to 100°C., then passing it through a cooling zone at a temperature of below 35°C., and then drawing the filament.

231409

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