Intermediate product capable of being formed into a biaxially or

Details Intermediate product capable of being formed into a biaxially or Intermediate product capable of being formed into a biaxially or

1996-07-18

1998-05-05

Timm, Catherine

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

428 357, 4285428, 428910, 264527, 264530, 264532, 264906, 264908, 264909, B29C 4918, B29C 4908, B29D 2200

Patent

active

057471304

ABSTRACT:
A biaxially oriented polyethylene terephthalate resin bottle-shaped container, and method of blow-molding the same, is disclosed. The method comprises the steps of heating the body portion of a preform at 90.degree. to 130.degree. C., biaxial-orientation blow-molding the preform in a primary blowing mold heated at 110.degree. to 230.degree. C. to form a primary intermediate molded bottle-shaped piece, heating the primary intermediate molded bottle-shaped piece at 130.degree. to 255.degree. C. or at a temperature which is at least 20.degree. C. greater than the primary blowing mold temperature to form a secondary intermediate molded bottle-shaped piece, and blow-molding the secondary intermediate molded bottle-shaped piece in a secondary blowing mold heated at 100.degree. to 150.degree. C. to form a bottle-shaped container. The temperature of the secondary blowing mold is several degrees greater than the maximum temperature the molded bottle-shaped container will be subjected to during use. The bottle-shaped container of the present invention has no stress remaining from biaxial orientation blow-molding and has a high heat resistance temperature value.

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