Oriented plastic container

A preform for making oriented plastic containers having a dimensionally stable finish comprising:

• an injection molded finish part having an open upper end and an open lower end and made of a first plastic material,
• said finish part including an axially extending inner surface and an axially extending outer surface, said outer surface including a thread portion extending axially and defining an exterior thread on the neck of the final container,
• an elongated main hollow body of orientable strain-hardenable thermoplastic material injection molded and bonded in situ on said previously molded open ended finish part,
• the material of said finish part having substantially greater thermal stability than the material of said hollow body,
• said hollow body including a main body container forming portion and a closed bottom container forming portion closing the open end of the main body forming portion,
• said hollow body having an axially extending body portion of said body engaging the open lower end of the finish part and extending within the inner surface of said finish part, the body portion having a free end terminating within and in axially spaced relationship to the open upper end of the finish part such that the inner surface of said finish part is exposed to the atmosphere and said exterior thread portion is exposed to the atmosphere, and
• such that when the preform is blown at orientation temperatures, the hollow body forms the hollow body of a container with said inner surface of said finish part adjacent said open end of the finish part being exposed to the atmosphere and the outer surface of said open upper end of said finish part and the outer surface of said threaded portion of said finish part being exposed to the atmosphere in order that said exposed surfaces of greater thermal stability are subjected to the hot containers during filling of the container or when the contents are to be pasteurized.