Patent ID: 9061449
Filing Date: 2015-06-23
Classification: B29C,B29K,C08J

Abstract:
1. A process for producing a fluororesin sheet containing a filler which process comprises, in the following order, a stirring step comprising stirring a fluororesin, a filler, and a processing aid thereby preparing a fluororesin sheet-forming resin composition comprising said fluororesin, said filler, and said processing aid, a pre-molding step for preparing a preform by extrusion molding of the fluororesin sheet-forming resin composition, a rolling step comprising rolling and shaping the preform into a sheet at a roll temperature of from 40 to 80° C. with the processing aid in the sheet-forming resin composition being gradually evaporated and removed, a drying step, and a calcining step, wherein for the fluororesin sheet-forming resin composition, wherein the pre-molding step is carried out at a temperature lower than the roll temperature in the rolling step.