Blow molded, oriented plastic bottle and method for making same

Details Blow molded, oriented plastic bottle and method for making same Blow molded, oriented plastic bottle and method for making same

B - Operations, Transporting

29

D

18/538

B29D 23/03 (1980.01)

Patent

CA 1052965

ABSTRACT OF THE DISCLOSURE The present invention provides a method for making a self-supporting biaxially oriented container having a substan- tially uniform high degree of orientation radially of the side- wall of the container comprising the steps of forming a parison having a tubular sidewall with inner and outer surfaces from a glassy, essentially non-crystalline thermoplastic polymeric material which is capable of being biaxially oriented during blow molding, temperature conditioning the parison to establish between the inner and outer surfaces of the sidewall of the parison outwardly radially decreasing temperatures within the orientation temperature range of the polymeric material, the decreasing temperatures being related to the radially outwardly decreasing degree of blow molding induced stretch so as to achieve substantial radial uniformity of orientation and blow molding the temperature conditioned parison to stretch the poly- meric material of the parison to the container shape and to biaxially orient the material.

300542

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