MULTILAYER BOTTLE AND PROCESS FOR ITS PRODUCTION

摘要

A multilayer bottle comprising a polyglycolic acid layer and thermoplastic polyester resin layers and being excellent in gas barrier properties, heat resistance, processability in molding, transparency and endurance and a process for production thereof. In the bottle, polyglycolic acid is used as the gas barrier resin, and the body and the bottom are made of a composite material constituted of external and internal layers made from a thermoplastic polyester resin and at least one polyglycolic acid inner layer lying between them. The bottleneck is formed only of a thermoplastic polyester resin layer, and the body is biaxially oriented. The bottle has such heat resistance as to withstand hot fill carried out under the conditions of 93 °C and 20 seconds.