Method for producing synthetic threads from polymer mixtures

The synthetic threads are produced from a polymer mixture consisting of polyamide as base polymer and at least one additive polymer, the polymer mixture being pressed through nozzle openings as polymer melt with extrusion speeds (s) in the range from 18 to 160 m/min. The filaments thus formed are co...

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Bibliographic Details
Main Author DIETMAR WANDEL,ALEXANDER KLEIN
Format Patent
LanguageEnglish
Published 11.01.2006
Subjects
APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS
CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS
NATURAL OR ARTIFICIAL THREADS OR FIBRES
SPINNING
TEXTILES
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Summary:The synthetic threads are produced from a polymer mixture consisting of polyamide as base polymer and at least one additive polymer, the polymer mixture being pressed through nozzle openings as polymer melt with extrusion speeds (s) in the range from 18 to 160 m/min. The filaments thus formed are cooled, combined to threads, drawn off and spooled by forming at least one thread spool. The content of additive polymer in the polymer mixture is not less than M wt-% and not more than 2.5 wt-%, where M is derived from 0.0001.v-0.4, where v is the draw-off speed of the thread, and v lies in the range from 4500 to 8000 m/min. The additive polymer is amorphous and virtually insoluble in the polymer melt. In the spooled thread, the additive polymer is present in the base polymer in a fibril structure, the ratio s:v lies in the range from 1:50 to 1:250. Upon spooling, the thread spool preferably has a weight of the spooled thread of at least 4 kg.
Bibliography:Application Number: CN20018018210