Multi-Layer Injection Molded Container
AssigneeSilgan Specialty Packaging LLC
InventorsJoel R. Frerichs, Brian Elflein, Joshua J. Eastman
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Abstract
A coinjection molded multi-layer container includes an inner layer, an outer layer, and a barrier layer. The inner layer includes a first polymeric material and forms an inside surface of the container. The outer layer includes the first polymeric material and forms an outside surface of the container. The barrier layer is located between the inner layer and the outer layer and includes a second polymeric material less permeable to gas than the first polymeric material. The barrier layer is biased toward the inside surface or the outside surface such that the inner layer and the outer layer have different thicknesses.
Claims7
A coinjection molded multi-layer container comprising:
- a base;
- a side wall extending from the base, the side wall comprising:
- a side wall inner layer comprising a first polymeric material and forming an inside surface of the side wall;
- a side wall outer layer comprising the first polymeric material and forming an outside surface of the side wall;
- and
- a side wall barrier layer located between the side wall inner layer and the side wall outer layer and comprising a second polymeric material less permeable to gas than the first polymeric material;
- wherein the side wall barrier layer is biased toward the inside surface of the side wall at a first part of the side wall, such that the side wall outer layer is thicker than the side wall inner layer at the first part of the side wall;
- wherein the side wall barrier layer is biased toward the outside surface of the side wall at a second part of the side wall, such that the side wall inner layer is thicker than the side wall outer layer at the second part of the side wall;
- and
- wherein the first part of the side wall is located nearer to the base than the second part of the side wall.
Dependencies are inferred from the claim text.