Patent ID: 6524672
Filing Date: 2003-02-25
Classification: B29B,B29C,B29K,B32B,B65D,Y10S,Y10T

Abstract:
A preform for forming a hollow blow molded plastic container, which comprises:a closed base, a multilayer body portion extending from the base, and an open back portion extending from the body position; said body portion having an inner liner with a controllably variable thickness along its length and comprising: (a) an innermost polymer layer, (b) at least one oxygen scavenger layer, and (c) at least one high-barrier layer for retarding the migration of gases and moisture therethrough, wherein the innermost polymer layer of the inner liner has an outermost layer that is comprised of a different polymeric material than the innermost polymer layer of the inner liner; wherein, at any given point along the length of the inner liner, the wall thickness of the innermost polymer layer is less than 0.50 of the wall thickness of the inner liner, and the wall thickness of the inner liner is less than 0.25 of the total wall thickness of the preform body portion; and a molded outermost layer that is comprised of a recycled polymeric material or a different polymeric meterial than the innermost polymer layer of the liner; wherein the outermost layer is substantially adjacent the inner liner and co-extensive therewith.