MULTILAYER PREFORM WITH RECOVERY POLYESTER RESIN LAYER, ITS MANUFACTURE, AND MULTILAYER CONTAINER MOLDED FROM THE PREFORM

摘要

PROBLEM TO BE SOLVED: To provide a preform without generation of blushing wherein a once used recovered polyester resin is effectively used and the resin does not come into contact with content, and a container using the preform. SOLUTION: In a stretching blow molding multilayer preform 11 comprising an inside layer 18 and an outside layer 19, with a two-layer structure of the layer 18 which is a molding obtained by primarily injecting virgin polyester resin and the layer 19 which is a post-formed molding obtained by secondarily injecting recovery polyester resin to an outer surface of the molding and molding it in such a manner that a thickness of the layer 19 is 0.5-2.5 mm. And, this preform 11 is used to manufacture the container.