Patent ID: 6376563
Filing Date: 2002-04-23
Classification: B29C,C08G,C08J,Y02W

Abstract:
A process of forming a polyethylene terephthalate (PET) material mixture which is suitable for subsequent processing, comprising the steps of:collecting diverse PET materials having a relatively wide distribution of intrinsic viscosity (IV) values; co-mingling said collected PET materials and reforming said co-mingled PET materials into a heterogeneous mixture of PET materials comprising substantially crystalline flake segments and non-crystalline chunk segments; and removing said substantially non-crystalline chunk segments from said heterogeneous mixture of PET materials so as to leave substantially only said substantially crystalline flake segments within said heterogeneous mixture of PET materials such that when said heterogeneous mixture of PET materials comprising substantially only said substantially crystalline flake segments is processed further so as to increase said intrinsic viscosity (IV) values of said PET materials, the generation of a substantial amount of heat of crystallization within said processed mixture of said PET materials will be effectively prevented.