MANUFACTURING METHOD OF A LIQUID CRYSTALLINE POLYESTER COMPOSTION CAPABLE OF EASILY MANUFACTURING A MOLDED ARTICLE HAVING THIN PART AND HAVING COMPLICATED SHAPE

摘要

PURPOSE: A manufacturing method of a liquid crystalline polyester compostion is provided to have excellent moldability, and to manufacture liquid crystalline polyester composition which less generates blister at high temperatures.;CONSTITUTION: A manufacturing method of a liquid crystalline polyester compostion comprises a step of supplying liquid crystal polyester and polyhydric alcohol fatty acid ester to an extruder with a vent part, and a step of melt-mulling the materials in the state the pressure of the vent part is -0.06 MPa or less at gauge pressure. The supplying amount of the polyhydric alcohol fatty acid ester is 0.1-1 parts by weight on the basis of 100.0 parts by weight of the liquid crystalline polyester. The 5weight%-reduction temperature of the polyhydric alcohol fatty acid ester, which is measured by thermogravimetric analysis is 250°C or higher.;COPYRIGHT KIPO 2012