A method is disclosed for conditioning strain hardenable thermoplastic materials, such as polyethylene terephthalate, so that a highly developed strain crystallized morphology may be established during a blow molding operation. In the method, a thermoplastic parison is heated to a temperature in a range...http://www.google.fr/patents/US4144298?utm_source=gb-gplus-shareBrevet US4144298 - Method of forming strain crystallized thermoplastic articles
Method of forming strain crystallized thermoplastic articles
