Patent ID: 7915341

Claim:
An ethylene-vinyl alcohol copolymer comprising the structural unit of formula (1): (wherein X represents an alkylene group having at most 6 carbon atoms, each of R 1 to R 4 represents independently either of a hydrogen atom, a hydrocarbon group having 1 to 8 carbon atoms, a cyclic hydrocarbon group having 3 to 8 carbon atoms or an aromatic hydrocarbon group and n represents 0 or 1); wherein an ethylene content is 20 to 60% by mol; wherein an amount of the structural unit of formula (I) is 0.1 to 10% by mol; wherein a hydrolysis degree is at least 90% by mol; and wherein a melt flow rate (210° C. and a load of 2160 g) is 0.1 to 100 g/10 minutes.