Heat-setting polyester orientation molding container

Abstract

Abstract PURPOSE:To manufacture a heat-setting polyester orientation molding container of superior heat resistance and dimension stability having heat-sterilizing capacity by heat-setting a body section of the container with given crystallinity index or more and providing the container with a capability of holding given shape retaining temperature. CONSTITUTION:A container formed by the biaxial orientation blow molding of polyethylene terephthalate and heat-set to hold the shape retaining temperature of 75-120 deg.C, and its body is heat-set to have the crystallinity index of 34% or more. The heat-set polyester orientation molded container is manufactured by biaxial orientation blow molding a closed-end polyethylene terephthalate preform in a mold at high temperature, heat-setting a molded product thus prepared in the mold at the high temperature of 135 deg.C or more, releasing the heat-set molding product with its surface temperature higher than that of the glass transition point of polyethylene terephthalate and to be able to retain the shape substantially out of the mold, annealing the released molded product in the heat dissipating atmosphere and shrinking freely the molded product.

Inventors

• 👤 Akira Sakamoto
• 👤 朗 坂本
• 👤 Shunsaku Hirata
• 👤 平田　俊策
• 👤 Shigezo Nohara
• 👤 野原　繁三
• 👤 Yutaka Hamano
• 👤 浜野　豊
• 👤 Eishiro Sakurai
• 👤 桜井　英四郎

Bibliographic Details