Double-blown PET bottle shaped container having essentially no r

Details Double-blown PET bottle shaped container having essentially no r Double-blown PET bottle shaped container having essentially no r

1994-10-24

1996-10-08

Timm, Catherine

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

428 3692, 428910, 215373, 264521, 264530, 264906, B29C 4908, B29D 2200

Patent

active

055629601

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. C. to 130.degree. C., biaxial-orientation blow-molding the preform in a primary blowing mold heated at 110.degree. C. to 230.degree. C. to form a primary intermediate molded bottle-shaped piece, heating the primary intermediate molded bottle-shaped piece at 130.degree. C. 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. C. 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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