| 摘要 |
PROBLEM TO BE SOLVED: To provide a lightweight polyimide film for forming having excellent surface smoothness, safety, formability, heat resistance and handleability and suitable as a reflector substrate for lighting equipment. SOLUTION: The polyimide film for forming is a film composed of a thermoplastic polyimide obtained by reacting an aromatic tetradicarboxylic dianhydride with an aromatic diamine. The polyimide film for forming is characterized in that the minimum viscoelasticity of the storage modulus (E') of the viscoelasticity is≤10<SP>8</SP>Pa and the tensile elongation at the glass transition temperature (E") A is≥150%. COPYRIGHT: (C)2008,JPO&INPIT
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