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US 5,939,153 AGranted
Multilayered plastic container
AssigneeThe Elizabeth and Sandor Valyi Foundation, Inc.
InventorEmery I. Valyi
Life of this patent
Estimating the term…
Abstract
Process for forming a multilayered plastic article and multilayered plastic preform and container, wherein a polyepoxide or a liquid crystal polymer in the liquid form is applied to a substrate in a thickness which varies over the extent of the substrate to form a multilayered substrate, forming a tubular liner from said multilayered substrate, and coating the tubular liner with an outer layer.
Claims23
A multilayered plastic container, which comprises:
- an upper portion having at least an inner layer and an outer layer;
- an intermediate sidewall portion having at least an inner layer and an outer layer;
- and
- a base portion having at least an inner layer and an outer layer;
- wherein said inner layer is a laminate having an innermost layer and a second layer between the innermost layer and the outer layer, said second layer having a thickness which varies from the upper portion to the sidewall portion and which varies from the sidewall portion to the base portion, and wherein said second layer is a barrier material selected from the group consisting of a polyepoxide, a liquid crystal polymer, and an inorganic barrier material, wherein the barrier layer is thicker at the sidewall portion than at the upper portion.
2 more elements
A multilayered plastic preform, which comprises:
- an upper portion having at least an inner layer and an outer layer;
- an intermediate sidewall portion having at least an inner layer and an outer layer;
- and
- a base portion having at least an inner layer and an outer layer;
- wherein said inner layer is a laminate having an innermost layer and a second layer between the innermost layer and the outer layer and said second layer being a barrier material selected from the group consisting of a polyepoxide, a liquid crystal polymer, and an inorganic barrier material, wherein said second layer has a thickness which varies from the sidewall portion to the base portion and which varies from the upper portion to the sidewall portion, wherein the barrier layer is thicker at the sidewall portion than at the upper portion.
2 more elements
Dependencies are inferred from the claim text.