Hot-fillable plastic containers
AssigneeAir Products and Chemicals, Inc.
InventorRajendra K. Mehta
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Abstract
The present invention is an improved plastic container having both improved thermal resistance and improved aroma and flavor barrier properties. The container comprises a polyethylene inner layer having a thickness in the range of 0.5 to 10.0 mil, and a coextruded polypropylene outer layer having a thickness such that the ratio of polypropylene to polylethylene is at least 2:1, and wherein the surface of the polyethylene layer has been treated with a reactive source of fluorine.
Claims20
A coextruded container having both improved thermal resistance and improved flavor and aroma barrier properties comprising:
- a polyethylene inner layer having a thickness in the range of 0.5-10.0 mil which forms the interior surface of the container, and a polypropylene outer layer which forms the exterior surface of the container, said polypropylene layer having a thickness such that the ratio of polypropylene to polyethylene thickness is at least 2:1, and wherein said polyethylene layer which forms the interior surface of the container has been treated with a reactive source of fluorine.
In a process for forming a container by molding a thermoplastic material, the improvement for increasing the thermal resistance and flavor and aroma barrier properties, which comprises:
- molding said container using a coextruded thermoplastic multilayer material comprising a polyethylene inner layer having a thickness in the range of 0.5-10.0 mil and a polypropylene outer layer having a thickness such that the ratio of polypropylene to polyethylene thickness is at least 2:1, such that the polyethylene layer forms the interior wall of the container, and surface treating the interior polyethylene layer with a reactive source of fluorine.
Dependencies are inferred from the claim text.