Molding process
A process of forming a polyethylene terephthalate container in which the container is biaxially oriented simultaneously with being blow-molded. The container is allowed to remain in the blow mold having a surface temperature between about 150.degree. C. and about 250.degree. C. for a time sufficiently long to result in the container reaching a crystallinity of at least 30% while the pressure is simultaneously maintained above atmosphere inside the container to prevent collapse thereof. The process enhances dimensional stability at temperatures sufficiently high to normally cause shrinkage of the container.
Description
Patent History
Patent number: T101205
Type: Grant
Filed: Jan 26, 1981
Date of Patent: Nov 3, 1981
Inventors: Gordon K. Goulder (Kingsport, TN), Edward R. Hollander, Jr. (Kingsport, TN)
Application Number: 6/228,415
Type: Grant
Filed: Jan 26, 1981
Date of Patent: Nov 3, 1981
Inventors: Gordon K. Goulder (Kingsport, TN), Edward R. Hollander, Jr. (Kingsport, TN)
Application Number: 6/228,415
Classifications
Current U.S. Class:
Including Application Of Internal Fluid Pressure To Hollow Finite Length Parison To Expand Same Into Conformity With Female Mold Part (264/523);
Shaping Is Longitudinal Or Axial Stretching Prior To Or During Differential Fluid Pressure Deformation (264/532)
International Classification: B29C 1707;
International Classification: B29C 1707;