Zimmer Aktiengesellschaft

Degussa Aktiengesellschaft

Lurgi Zimmer Aktiengesellschaft

Alexander Klein

Dietmar Wandel

Ulrich Thiele

Helmut Schwind

Heinz-Dieter Schumann

Wolfgang Janas

Joachim Cziollek

Werner Ude

Klaus Dorn

Ulrich Mirwaldt

Bernd Kretschmann

Peter Kempf

Achim Dulling

The present invention relates to a method for the manufacture of synthetic fibers from a melt mixture of fiber forming matrix polymers, wherein at least one second amorphous additive polymer, which is immiscible with the fiber forming matrix polymer, is added to the fiber forming matrix polymers in a quantity of 0.05-5 wt % (with reference to the total weight of fiber forming matrix polymer and the additive copolymer). The additive polymer is obtained by multiple initiation. Furthermore, the present invention also relates to the synthetic fibers produced by the method.

Method for the manufacture of synthetic fibers from a melt mixture based on fiber forming polymers

Method of spinning, spooling, and stretch texturing polyester filaments and polyester filaments produced

A first stream of a polyester melt is divided into a second and a third polyester stream, the flow rate of the first stream being 100 to 2000 kg/h and the flow rate of the second polyester stream being 5 to 300 kg/h. 0.2 to 100 kg/h of a molten additive polymer is metered to the second polyester stream, and the additive polymer together with the second polyester stream is passed through a first mixing line. There is obtained a first polymer mixture whose content of additive polymer is 3 to 50 wt-%. The first polymer mixture is introduced into the third polyester stream, the first mixture together with the third polyester stream being passed through a second mixing line and forming a second polymer mixture. The second polymer mixture is extruded to obtain filaments, the filaments are cooled and combined to threads, the threads are unwound with a speed of at least 1000 m/min. The threads are processed to obtain either continuous threads or staple fibers.

Process of producing synthetic threads from a polyester-based polymer mixture

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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Ingelheim, Germany

Alexander Klein