Zimmer Aktiengesellschaft

Bernd Kretschmann

Werner Ude

Helmut Schwind

Heinz-Dieter Beeck

Wolfgang Janas

Alexander Klein

Wilhelm Sprick

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

A spinning pack with a sand filter for the melt spinning of thermoplastics, whereby at least one perforated plate with evenly distributed D-shaped holes with slanting openings that taper conically in the direction of flow is placed in the direction of flow in front of and/or behind the sand filter. Spinning packs according to the invention surprisingly give highly uniform distribution and flow of thermoplastic melt through the sand filter.

Spinning pack with sand filter

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Alzenau, Germany

Bernd Kretschmann