Multilayered container

Abstract

Disclosed is a multilayered container having an intermediate layer comprising an oxygen-absorbable barrier resin composition showing excellent processability upon molding. Specifically disclosed is a multilayered container which comprises an inner layer and an outer layer each comprising an olefin resin and an intermediate layer provided between the inner layer and the outer layer and comprising an oxygen-absorbable barrier resin composition, wherein the oxygen-absorbable barrier resin composition has a cooling crystallization peak temperature lower than that of a base resin (an oxygen barrier resin) which constitutes the oxygen-absorbable barrier resin composition, the multilayered container is formed by a solid-phase forming process at a temperature lower by 1 to 15° C. than the cooling crystallization starting temperature (Tc2) of the base resin, and the body of the container shows a calorific value of less than 0.5 J/g by the isothermal crystallization after heating from 30° C. to 130° C. at a heating rate of 100° C./min in a thermal analysis of the body.

1 . A multilayered container comprising:
 an inner layer including an olefin resin;   an outer layer including an olefin resin; and   an intermediate layer provided between the inner layer and the outer layer and consisting of an oxygen-absorbing barrier resin composition, wherein   a cooling crystallization peak temperature of the oxygen-absorbing barrier resin composition is lower than that of a base resin (an oxygen barrier resin) of the oxygen-absorbing barrier resin composition,   the multilayered container is solid-phase formed in a temperature range (T) which is lower by 1 to 15° C. than a cooling crystallization starting temperature (Tc2) of the base resin, and,   a thermal analysis of a body portion of the container shows that an amount of heat released during isothermal crystallization after a temperature raise from 30° C. to 130° C. at 100° C./min is less than 0.5 J/g.   
   
   
       2 . The multilayered container according to  claim 1 , wherein
 x-ray diffraction measurement shows that an intensity ratio I/I 0  of an intensity (I) of an (110) plane to a baseline (I 0 ) is 4 or more in at least the body portion of the container.   
   
   
       3 . The multilayered container according to  claim 1 , wherein
 the oxygen-absorbing barrier resin composition includes a resin obtained by blending, with the base resin, an oxidizable polymer having unsaturated ethylenic bonds and an oxidation catalyst.   
   
   
       4 . The multilayered container according to  claim 1 , wherein the base resin is an ethylene-vinyl alcohol copolymer resin.