MANUFACTURING METHOD OF DOUBLE CONTAINER MADE OF SYNTHETIC RESIN, AND DOUBLE CONTAINER MADE OF SYNTHETIC RESIN

摘要

PROBLEM TO BE SOLVED: To provide a double container made of a synthetic resin at a low cost by forming the double container having a thermal insulation function by blow molding.

SOLUTION: A laminated preform 11 has an external layer 16 made of a polyethylene terephthalate based resin and an adjacent layer 17 which is adjacent to the external layer 16 and made of a synthetic resin being non-adhesive to the polyethylene terephthalate based resin. The laminated preform 11 is biaxial drawing blow molding, and the adjacent layer 7 is heat-shrunk by a heat-treatment after the blow-molding, and a gap 10 is formed between the external layer 6 and the adjacent layer 7.

COPYRIGHT: (C)2005,JPO&NCIPI