Plastic preform having reinforced container base forming portion and container formed therefrom
AssigneeContinental PET Technologies, Inc.
InventorsWayne N. Collette, Suppayan M. Krishnakumar
Life of this patent
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Abstract
A blown plastic container of a type normally blown from a single resin preform, such as PET, wherein the bases of a three layer construction with at least one layer either being PET having a high IV or a resin which has a high Tg. The secondary resin may either be in the form of a core layer injected into the base of the injection molded preform or in the form of initially injected inner and outer base layers. By utilizing a small amount of the second resin, greater strength can be obtained together with a greater resistance to cracking at higher temperatures as well as the reduction in the overall weight of the resultant container.
Claims11
An injection molded plastic preform for the blow molding of a container, said preform including a neck finish portion, a body forming portion and a base forming portion, said neck finish portion and said body forming portion being formed of a single layer and at least part of said base forming portion being formed of three layers, said three layers including inner and outer layers and a core, said inner and outer layers being formed of the same first material, and said core being separately injected and formed of a second and different material, and said single layer portions being formed of the same material as that from which a selective one of said inner and outer layers and core is formed.
Dependencies are inferred from the claim text.