PURPOSE: To obtain the titled molding large in the elastic modulus but small in the coefficient of linear expansion with an excellent dimensional stability by extruding a polymer of a melt liquid crystal at a specified shearing speed to form a thermotropic liquid crystal with polymer molecules oriented lengthwise.
CONSTITUTION: A polymer of a melt liquid crystal is extruded at the shearing speed of almost more than 102sec-1 from an extruder cross head die 2, solidified by cooling through a cooling tank 4 or the like and then, wound with a winder 5 to obtain a polymer molding with polymer molecules oriented lengthwise. It should be noted that the liquid crystal polymer shall have the intrinsic viscosity of at least 0.3 and aromatic polyester is preferably used to enable the formation of an anisotropic melt phase at a lower temperature than 300°C, containing the group of (A) formula I , the group of (B) formula II and the group of (C) formula III while containing 37.5W16.7mol% of the components A and B in the equal quantity each and 25.0W66.6mol% of the component C.
YAMAMOTO FUMIO
YAMAKAWA SHINZOU
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