Injection molded, polyethylene terephthalate parison for...

Details Injection molded, polyethylene terephthalate parison for... Injection molded, polyethylene terephthalate parison for...

B - Operations, Transporting

65

D

190/26.1

B65D 1/02 (2006.01)

Patent

CA 1164174

ABSTRACT OF THE DISCLOSURE A polymer parison to be blow molded into a container configuration is disclosed, which includes a reduced diameter neck and a tapered wall dis- posed between the neck and a greater diameter body portion of the container. The body portion is shaped to permit a sufficient amount of stretch to be imparted to the tapered wall forming portion of the parison which has a less- stretching tendency during the blow molding operation. Polyethylene terephthalate exhibits greatly improved characteristics and enhanced durability when it is biaxially stretched beyond a certain fixed level. The parison is formed by injection molding such that when the parison is placed in the mold cavity, the tapered wall forming portion is at a longer distance away from the cavity wall so as to achieve a sufficient amount of stretch, as compared with the body forming portion of the parison, when it is blown to assume the con- tour of the mold.

331423

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