PURPOSE: To obtain a workpiece of a metallic plate coated with a thermoplastic polyimide having excellent heat resistance which can be easily punched, cut, drilled, notched, etched, polished, plated, bent or drawn, and further to obtain a secondary workpiece formed by attaching with heat and pressure the metallic plate and a matter to be attached through the thermoplastic polyimide as an adhesive.
CONSTITUTION: A metallic plate is coated with a thermoplastic polyimide obtained by means of polycondensation of at least one diamine out of 1,3-bis(3- aminophenoxy)benzene, 4,4'-bis(3-aminophenoxy)biphenyl and 3,3'- diaminobenzophenone and at least one tetracarboxylic acid dianhydride out of 3,-3',4,4'-diphenylether tetracarboxylic acid dianhydride, 3,-3',4,4'-benzophenone tetracarboxylic acid dianhydride, and 3,3',4, 4'-biphenyl tetracarboxylic acid dianhydride. By using the metallic plate, a workpiece and a secondary workpiece are obtained.
TAGAWA KIMITERU
KOBAYASHI YOSHITAKE
KABETANI TOSHIHIKO
YAMAMURA TAKESHI
OTSUBO EIJI
