abstract |
(I), wherein the ratio of the peak intensity at 988 cm -1 to the peak intensity at 1410 cm -1 obtained by infrared spectroscopic analysis of the surface of the polyester substrate satisfies the following formula And a modulus of elasticity of 5 MPa or more and 800 MPa or less. 0.010? (Peak intensity at 988 cm -1 ) / (peak intensity at 1410 cm -1 )? 0.040 (I) |