Process for making a filament from a polyester-polypropylene ble

Details Process for making a filament from a polyester-polypropylene ble Process for making a filament from a polyester-polypropylene ble

1998-01-08

1999-08-31

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

2642107, 2642108, 26421117, 2642356, 264342RE, D01D 512, D01D 1002, D01F 636

Patent

active

059450550

ABSTRACT:
A method for making linear materials for fasteners, particularly monofilaments, which possess pearly luster and retain this pearly luster intact even after being dyed. A polyester, particularly polyethylene terephthalate, is blended with 1 to 10% by weight of polypropylene and the resultant blend is subjected to melt spinning. The undrawn filament thus obtained possesses pearly luster and can be used as a raw material for fastener parts presenting an appearance of high quality. The undrawn filament has the dyeability thereof adjusted without noticeably affecting the degree of shrinkage when it is drawn at a temperature in the range of from 70 to 98.degree. C. Thus, the monofilaments for fasteners, which possess pearly luster and are allowed to be dyed in colors harmonized with the colors of fastener tapes, can be produced.

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