Stock material or miscellaneous articles – Hollow or container type article – Polymer or resin containing
Patent
1998-09-25
2000-04-18
Robinson, Ellis
Stock material or miscellaneous articles
Hollow or container type article
Polymer or resin containing
428 3691, 4285428, 4289033, 264513, 264516, 215 121, B29B 1108, B29C 4516
Patent
active
060512954
ABSTRACT:
A multilayer plastic perform formed from a combination of virgin and recycled plastic such as PET so that the resultant blow-molded bottle has a reduced tendency for bottom failure in spite of the use of recycled plastic. A first plastic preform for providing the inner layer of the multi-layer preform is provided with spaced channels on the exterior surface of a closed end thereof extending from a central region of that end to the sidewalls. An injection mold cavity is provided with a like plurality of channels formed therein in a closed end thereof communicating with the injection gate of an injection molding apparatus. The first plastic preform is inserted into the injection mold cavity with the respective channels of the preform and the injection mold cavity substantially aligned. A second layer of plastic material is overmolded onto the first layer by injection molding in the cavity. A third layer of plastic material may be overmolded on the second layer to form a three-layer preform. Preferably the first and third layers are formed from virgin plastic and the second layer is formed from recycled plastic.
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Balduff Dennis C.
Schloss Francis M.
Figueroa John J.
Robinson Ellis
The Coca-Cola Company
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