| 摘要 |
<p>A multi-layered vessel constituted by an inner layer (A) of the thermoplastic polyester resin, an intermediate layer (B) of m-xylylene group-containing polyamide resin, and an outer layer of water permeation-resistant synthetic resin, with said inner layer (A) and said intermediate layer (B) in thin portions being oriented at least in one direction. This vessel is produced by stretching a parison with a multilayered structure constituted by the inner layer (A), intermediate layer (B), and outer layer (C) 1 to 4 times in the longitudinal direction and 2 to 7 times in the transverse direction within such temperature range that the surface temperature is between [Tg of said thermoplastic polyester resin + 15 DEG C] and [2(Tg + 15 DEG C].The use of a thermoplastic polyester resin for said inner layer (A) provides this vessel with excellent transparency, chemical resistance, impact resistance, etc., and the use of m-xylylene group-containing polyamide resin for the intermediate layer (B) provides excellent oxygen gas-interrupting properties.</p> |
