Patent ID: 8153753

Claim:
A polyamide film comprising a structural unit represented by the following chemical formula (II) or (III) and satisfying the following equations (1) to (2) when molar fractions of structural units represented by the following chemical formulae (II) and (III) are referred to as “m” and “n”, respectively: m+n= 100 (1) 1≦ m,n≦ 99 (2) chemical formula (II): R 5 : CF 3 , R 6 : CF 3 , R 7 : H, R 8 : H, and R 9 : substituted phenyl or biphenyl, represented by the following formulae: where R 18 : independently respectively, H, D (deuterium), halogen, aromatic group, hydrocarbon having a carbon number of 1 to 5, or halogenated hydrocarbon having a carbon number of 1 to 5, chemical formula (III): R 10 : SO 2 , R 11 : H, R 12 : H, R 13 : linked directly or a group having a carbon number of 6 to 12 which has at least a phenyl group as an inevitable component, R 14 : linked directly or a group having a carbon number of 6 to 12 which has at least a phenyl group as an inevitable component, and R 15 : phenyl, substituted phenyl or biphenyl, represented by the following formulae: where R 18 : independently respectively, H, D (deuterium), halogen, aromatic group, hydrocarbon having a carbon number of 1 to 5, or halogenated hydrocarbon having a carbon number of 1 to 5, having a Young's modulus in at least one direction of 4 GPa or more, a Tg of 300° C. or higher and exhibiting a light transmittance of 80% or more for all lights with wavelengths of from 450 nm to 700 nm and a light transmittance for a light with a wavelength of 400 nm of 75% or more.