MOLD RELEASE POLYESTER FILM FOR HOT PRESS MOLDING

摘要

PROBLEM TO BE SOLVED: To provide a mold release polyester film for hot press molding capable of reducing staining especially at the time of production of a flexible printed circuit board (FPC) at the time of hot press molding, causing no protrusion of a resin and imparting sufficient mold releasability. SOLUTION: The mold release polyester film for hot press molding is a polyester film having a mold release layer provided at least on its one side and characterized in that the polyester is used in a hot pressing process. The heat shrinkage factor thereof at 180°C for 5 min is preferably 5% or below. COPYRIGHT: (C)2006,JPO&NCIPI