Lurgi Zimmer Aktiengesellschaft

Degussa Aktiengesellschaft

Zimmer Aktiengesellschaft

Joachim Cziollek

Dietmar Wandel

Helmut Schwind

Wolfgang Janas

Ulrich Thiele

Werner Ude

Heinz-Dieter Schumann

Werner Mrose

Alexander Klein

Klaus Dorn

Peter Kempf

HMLS-fibers made of polyester and a spin-stretch process for its production

High strength polyester fibers comprising from 0.1 to 2.0 by weight of an incompatible, thermoplastic amorphous, polymeric additive.

High-strength polyester threads and method for producing the same

The invention concerns a method of processing polymer blends based on polyester or polyamide with a draw-off speed of .gtoreq.1500 m/min to produce filaments with an elongation at break of .ltoreq.180%, where a second amorphous polymer is added to the polyester or polyamide in the amount of 0.05 to 5 wt % and the polymer is a copolymer composed of at least two of the following monomer units:

Process for the processing of polymer mixtures into filaments

Process for the production of preoriented filaments from polyester-based polymer mixtures by spinning the polymer mixtures with a draw-off speed v of at least 2500 m/min, a second amorphous, thermoplastically processable copolymer having a glass transition temperature of more than 100.degree. C. being added to the polyester, wherein the ratio of the melt viscosity of the copolymer to the melt viscosity of the polyester is 1:1 to 10:1, in that the amount of copolymer added to the polyester is at least 0.05 wt. %, in that the maximum amount M of the copolymer added to the polyester depends on the draw-off speed v, and in that ##EQU1##

Process for processing polymer mixtures to filaments

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Mainz, Germany

Joachim Cziollek