Multi-layer preform for plastic blow molding

摘要

A multi-layer plastic preform (10) for use in plastic blow molding includes an injection molded inner layer (18) of virgin plastic having an outwardly extending annular flange (20) at an open end (14) of the preform. An injection molded outer layer (24) of post consumer recycled plastic covers the inner layer (18) and has a thread (26) for securing a closure, and this thread (26) is located toward the closed end (12) of the preform from the annular flange (20) of the inner layer (18) to thereby provide a construction that allows increased use of the recycled plastic. The preform (10) may be provided with an intermediate layer (22) of a gas barrier material when the container to be blow-molded from the preform is to be used to hold gas pressurized liquids such as soft drinks.