MOLD RELEASE FILM

摘要

PROBLEM TO BE SOLVED: To provide a mold release film having good resin retentivity in the case of laminating a plurality of layers of laminates having via holes through a prepreg and good heat resistance at a low cost. SOLUTION: The mold release film is used in a step of pressing the prepreg at a copper-clad laminate manufacturing time. The mold release film comprises a mold release layer provided on one side surface or both side surfaces of a polyester foamed film. The release layer is preferred to be formed by treating the layer with a silicone mold release agent.