Multilayer bottle, multilayer preform and production of them

Abstract

Abstract PURPOSE:To improve heat resistance and transparency by molding a bottle from a laminate prepared by successively laminating a polyethylene dicarboxylic acid copolymer and a polyethylene terephthalate resin. CONSTITUTION:A polyethylene naphthalate resin, a copolymer resin consisting of ethylene glycol, terephthalic acid and naphthalene dicarboxylic acid and a polyethylene terephthalate resin are laminated in this order to form a preform 7 having a multilayer structure. Subsequently, this preform is heated on the side of the polyethylene naphthalate layer and subjected to high stretching blow molding to mold a multilayer bottle 1 consisting of a mouth plug part 2, an upper shoulder part 3, a body part 4, a lower shoulder part 5 and a bottom part 6. The obtained multilayer bottle is excellent in the gas barrier properties to CO2 and also has good transparency.

Inventors

• 👤 Kazuto Yamamoto
• 👤 一人 山本
• 👤 Koji Niimi
• 👤 新美　宏二

Bibliographic Details