| 摘要 |
PROBLEM TO BE SOLVED: To obtain a film composed of a poly-4-methyl-1-pentene resin composition that has a high degree of surface crystallization and provides excellent mold release characteristics when used as a mold releasing film in the production of FPC (flexible print circuit), etc., and a mold releasing film being the resin film. SOLUTION: The film composed of a poly-4-methyl-1-penetene resin composition comprising 0.5-3 parts by mass of a polymer (A) constituted of a 4-10Cα-olefin except 4-methyl-1-penetene and 95.5-97 parts by mass of a poly-4-methyl-1-penetene (B) has a high degree of surface crystallization, a low blocking factor and provides excellent mold release characteristics when used as a mold releasing film in the production of FPC, etc. COPYRIGHT: (C)2006,JPO&NCIPI
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