Patent ID: 6413600
Filing Date: 2002-07-02
Classification: B29B,B29C,B29K,B29L,B65D,Y10T

Abstract:
A multi-layered plastic preform for manufacturing a blow molded container, comprising:a plastic inner liner having a thickness from 10 to 30 mils and having a cylindrical walled lower portion and a cylindrical walled upper portion integral with and extending upwardly from said lower portion, wherein at least a portion of said upper portion only of the plastic inner liner is crystallized by a heat treatment process; and an injection molded outer layer that is continuous with substantially the entire length of the plastic inner liner, wherein said preform has a closed bottom and an open neck and wherein at least a portion of the upper portion only of the inner liner is crystallized separately from and prior to injection molding of the outer layer, and wherein said inner liner is an innermost layer.