초록 ▼

A multi-layer preform for forming multi-layer containers includes an extruded inner barrier layer containing polyethylene naphthalate, said inner layer having an upper portion adapted to be formed into an upper portion of a container, an intermediate portion adapted to be formed into an intermediate

A multi-layer preform for forming multi-layer containers includes an extruded inner barrier layer containing polyethylene naphthalate, said inner layer having an upper portion adapted to be formed into an upper portion of a container, an intermediate portion adapted to be formed into an intermediate portion of a container, an extruded and a base portion adapted to form a base portion of a container. The preform includes an outer injection molded layer. The inner layer has a thickness which differs from the base portion to the upper portion.

대표청구항 ▼

A heat-resistant, multi-layered preform for blow molding a container, which comprises: an extruded inner barrier layer containing polyethylene naphthalate, said inner layer forming a cavity and defining an upper portion adapted to be formed into an upper portion of a container, an intermediate porti

A heat-resistant, multi-layered preform for blow molding a container, which comprises: an extruded inner barrier layer containing polyethylene naphthalate, said inner layer forming a cavity and defining an upper portion adapted to be formed into an upper portion of a container, an intermediate portion adapted to be formed into an intermediate portion of the container, and a base portion adapted to be formed into a base portion of the container; and an outer injection molded layer located substantially adjacent the inner layer and having a base portion, an intermediate portion and an upper portion thereof, wherein the outer layer comprises the major portion of the thickness of the preform and wherein the inner layer has a thickness which differs from the base portion to the upper portion, with the outer layer being thicker than the inner layer and with the thickness of the base and intermediate portions of the outer layer being substantially uniform.