초록 ▼

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 injecte

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.

대표청구항 ▼

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 porti

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.