| 摘要 |
PROBLEM TO BE SOLVED: To provide a biaxially oriented film of an ethylene-vinyl alcohol copolymer (EVOH) having excellent adhesiveness, particularly to a polyamide layer and free from the occurrence of appearance defect such as delamination due to the poor adhesive strength after a laminated body containing the biaxially oriented film of the EVOH is dipped in water at 85-100°C. SOLUTION: The ethylene-vinyl alcohol copolymer film formed by biaxially stretching has≥14.0 nm long period (d) (nm), where the long period (d) (nm) is a length calculated by expression: (d) (nm)=λ/(2sinθ) [where,λ:X-ray wavelength (nm), 2θ: diffraction angle (rad)] from the maximum value of an angle distribution spectrum of scattering intensity measured by small-angel X-ray scattering measurement, and the longer length obtained by comparing a long period (d1) obtained by the measurement of the incident light of X-ray to a sample in the transmission direction and a length (d2) obtained by the measurement in the cross-sectional direction to each other is defined as the long period (d). COPYRIGHT: (C)2010,JPO&INPIT |
