Apparatus for the production of moldings from thermotropic, liqu

Details Apparatus for the production of moldings from thermotropic, liqu Apparatus for the production of moldings from thermotropic, liqu

1992-08-05

1994-02-01

Nguyen, Khanh

Plastic article or earthenware shaping or treating: apparatus

Means feeding fluent stock from plural sources to common...

Extrusion shaping means

4251311, 425145, 425380, 4253823, 4253824, 425462, B29C 4714, B29C 4770, B29C 4792

Patent

active

052827313

ABSTRACT:
In the production of moldings from thermotropic, liquid-crystalline plastics, the chains of the LC polymer molecules are oriented in at least two preferred directions independent of one another. For this purpose, the polymer melt stream which emerges from an extruder is divided into two part streams which are fed via melt lines to an adapter. A distributing element which is caused to rotate by a drive unit is located in the adapter. The adapter is upstream of a slot die and is connected to the latter. One part stream forms a polymer matrix while the other part stream incorporates in, or is superimposed on, this polymer matrix individual polymer strands at different cross-sectional levels by the rotating distributing element. These polymer strands reinforce the polymer matrix. These polymer strands form multiple-pitch helices. The two part streams combined in the adapter enter the slot die and are shaped in the latter to give a multilayer melt film which is extruded through the slot die onto a cooling roller.

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