| abstract |
The present invention provides an ethylene-vinyl alcohol copolymer, a resin composition, and a molded product thereof, which is excellent in long-run property of melt-molding and inhibits occurrence of film formation defects such as film formation defects and streaks, The present invention relates to an ethylene-vinyl alcohol copolymer (A) obtained by saponifying a copolymer of ethylene and a vinyl ester by using a gel permeation chromatograph equipped with a differential refractive index detector and an ultraviolet visible absorbance detector, , And the molecular weight measured after heat treatment for 50 hours satisfies the condition represented by the following formula (1). (Ma-Mb) / Ma < 0.45 ... (One) Ma: molecular weight in terms of polymethyl methacrylate at the maximum peak measured by a differential refractive index detector Mb: molecular weight in terms of polymethyl methacrylate at the maximum absorption peak at a wavelength of 220 nm measured by an ultraviolet visible absorbance detector |