METHOD OF PRODUCING LIQUID CRYSTAL POLYESTER COMPOSITION

摘要

PURPOSE: A manufacturing method of liquid crystal polyester is provided to restrain decrease of heat resistance of liquid polyester composition by restraining liquid polyester originated from filler(talc) except fiber filler. CONSTITUTION: A manufacturing method of liquid crystal polyester comprises: a step of extruding liquid polyester by melt-rolling the liquid polyester with filler by using a twin screw extruder. The twin screw extruder has a cylinder with a feeding part(4), and an adding part(6). The feeding part supplies at least liquid crystal polyester. The adding part adds filler by beign formed in a lower part of the feeding part. The adding part comprises a first adding part(61), and a second adding part(62). The first adding part adds filler except fiber filler and the second adding part adds fiber filler. The screw(3) respectively comprises a first mixing part(81) and a second mixing part(82) in an upper part and a lower part based on the first adding part.