INJECTION STRETCH BLOW CONTAINER

摘要

An injection stretch blow container consisting of a combination of 97 to 70 parts by weight of saturated polyester and 3 to 30 parts by weight of a saponification product of an ethylene-vinyl acetate copolymer, said container having many areas, particularly at the body wall portion of said container in each of which areas substantially two-dimensional thin layers of said saponification product of said ethylene-vinyl acetate copolymer are laminated in parallel to the wall surface of said container in a matrix of saturated polyester, said saponification product of said ethylene-vinyl acetate copolymer in said area (20x20 mu ; vertical section or longitudinal section of the body wall of said container) is 0.001 to 1 mu m in average thickness and at least 5 in average aspect ratio and the laminated structural index represented by the following formula is at least 5: Laminated structural index wherein Li represents a length of the overlapped portion of adjacent layers of the saponification product of the ethylene-vinyl acetate copolymer, and hi represents a distance between adjacent layers of saponification product of ethylene-vinyl acetate copolymer. This container has a high gas-barrier quality and is useful as a bottle for carbonated beverages or the like.