| 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° C. in a nitrogen atmosphere satisfies the following formulae (1) to (3), and that it contains from 0.05 to 5 mumol/g of a carboxylic acid (A) and from 2 to 25 mumol/g, in terms of the metal element, of an alkaline earth metal salt (B), and satisfies the following formula (4): <paragraph lvl="0"><in-line-formula>0.05<=[eta]0<=0.2 (1) </in-line-formula><paragraph lvl="0"><in-line-formula>0.12<=[eta]10/[eta]0<=0.6 (2) </in-line-formula><paragraph lvl="0"><in-line-formula>0.1<=[eta]60/[eta]0<=0.8 (3) </in-line-formula><paragraph lvl="0"><in-line-formula>0.1<=(a1)/(A)<=1.0 (4) </in-line-formula>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 (mumol/g) of the carboxylic acid (A) and its salt in the resin composition, (a1) indicates the content (mumol/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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