Process for extruding thermotropic liquid crystalline polymers

Details Process for extruding thermotropic liquid crystalline polymers Process for extruding thermotropic liquid crystalline polymers

B - Operations, Transporting

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B29C 47/00 (2006.01) B29C 47/12 (2006.01) C08G 63/60 (2006.01) C09K 19/38 (2006.01) D01D 5/08 (2006.01) D01F 6/62 (2006.01)

Patent

CA 1225216

ABSTRACT OF THE DISCLOSURE Provided is a process for the extrusion of shaped articles which comprises extruding a thermotropic liquid crystal polymer through a short land or preferably no land die, and with subsequent draw down of the extruded profile being such as to render a draw down ratio of less than 4, and preferably about 1. Such extrusion of liquid crystal polymers in accordance with the present invention can consistently and reproducibly provide one with an article of high mechanical properties, and thus, particu- lar advantage is found in employing the process to extrude an article of cross-sectional dimensions which must closely approximate those of the extrusion die without sacrificing high mechanical properties. -1-

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