Process of making multifilament yarns of thermoplastic polymers

Details Process of making multifilament yarns of thermoplastic polymers Process of making multifilament yarns of thermoplastic polymers

1996-06-04

1997-04-08

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

With twining, plying, braiding, or textile fabric formation

2642108, 26421114, D01D 5088, D01D 516, D01F 632

Patent

active

056184816

ABSTRACT:
A multifilament yarn of a thermoplastic polymer based on tetrafluoroethylene, having high mechanical strength and dimensional stability at high temperatures (200.degree.-250.degree. C.), is prepared by melt extrusion through a die characterized by a hole density comprised between 10 and 150 holes/cm.sup.2 and provided with a cooling system of the emerging yarn of high efficiency and uniformity. The multifilament yarn can be subsequently drawn to obtain a fiber with even further improved tensile strength and modulus.

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