Stock material or miscellaneous articles – Hollow or container type article – Polymer or resin containing
Patent
1988-11-01
1990-05-08
Seidleck, James
Stock material or miscellaneous articles
Hollow or container type article
Polymer or resin containing
215 1C, 215 121, 428 367, 428212, 428213, 4285428, B65D 2300
Patent
active
049237233
ABSTRACT:
An injection molded plastic preform for forming by blow molding a container such as a bottle. The preform is of a laminated construction and in the body area includes inner and outer layers of the same plastic and an intermediate layer of a different plastic. The bottom portion of the preform is provided with a core layer of still a third plastic with the injection temperature of the third layer being sufficient to erode the contacted part of the intermediate layer which is of a lower melt temperature. The third plastic may be the same plastic as the first plastic, but injected at a higher temperature. Generally speaking, the neck finish of the preform will be of a single layer of the first material, the body of the preform will be of a three ply construction which is also true of the bottom with there being an intermediate area of five ply where the bottom core layer projects into the lower portion of the intermediate layer.
REFERENCES:
patent: 4728549 (1988-03-01), Shimizu et al.
Collette Wayne N.
Krishnakumar Suppayan M.
Nahill Thomas E.
Brown Charles A.
Brown Charles E.
Continental PET Technologies Inc.
Seidleck James
Shapiro Paul
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