Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Including application of internal fluid pressure to hollow...
Patent
1977-08-19
1979-04-24
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Including application of internal fluid pressure to hollow...
264529, 264530, 425526, B29C 1707
Patent
active
041512502
ABSTRACT:
A method for forming a molecularly oriented thermoplastic container, wherein a thermoplastic blowable shape such as a parison or a blown pre-form is blown to the configuration of the container within a blow mold cavity. The temperature of the blowable shape is within a range conducive to molecular orientation during the blowing step, which is rapidly performed by hot blow air at a temperature between about 100.degree. to 400.degree. F. Typically, a blowable shape formed of polyethylene terephthalate is blown while the shape is at a temperature within the range of 165.degree. to 200.degree. F. by the introduction into the shape of hot blow air at a temperature within the range of about 165.degree. to 200.degree. F. If desired, the blowable plastic shape may be axially stretched mechanically in addition to being blown in order to improve the biaxial orientation of the thermoplastic material in the final article.
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Barry James W.
Dickson Andrew C.
Click M. E.
Heberling R. D.
Owens--Illinois, Inc.
Silbaugh Jan H.
Wilson D. H.
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