| 摘要 |
Disclosed are a resin composition comprising an ethylene-vinyl alcohol copolymer, and a multi-layered structure comprising the resin composition. Adhering little to dies while worked, the resin composition ensures good long-run workability and self-purgeability; and its shaped articles have good appearance with few voids and are yellowed little. The resin composition is characterized in that the profile of its intrinsic viscosity [.eta.] in heat treatment at 220.degree.C in a nitrogen atmosphere satisfies the following formulae (1) to (3) , and that it contains from 0.05 to 5 .mu.mol/g of a carboxylic acid (A) and from 2 to 25 .mu.mol/g, in terms of the metal element, of an alkaline earth metal salt (B), and satisfies the following formula (4): 0.05 .ltoreq. [.eta.]0 .ltoreq. 0.2 (1) 0.12 .ltoreq. [.eta.]10/[.eta.]0 .ltoreq. 0.6 (2) 0.1 .ltoreq. [.eta.]60/[.ltoreq.]0 .ltoreq. 0.8 (3) 0.1 .ltoreq. (a1)/(A) .ltoreq. 1.0 (4) wherein; [.eta.]0 indicates the intrinsic viscosity of the non-heated resin composition, [.eta.]10 indicates the intrinsic viscosity of the resin composition heated for 10 hours, [.eta.]60 indicates the intrinsic viscosity of the resin composition heated for 60 hours, (A) indicates the total content (.mu.mol/g) of the carboxylic acid (A) and itssalt in the resin composition, (a1) indicates the content (.mu.mol/g) of a carboxylic acid (a1) having a molecular weight of at least 75 and its salt in the resin composition.
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