Blow molded polyester container with an over-molded thermoplastic layer
AssigneeColgate-Palmolive Company
InventorYu Shi
Life of this patent
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Abstract
Polyester containers that are produced from polyester preforms, the preforms preferably having a thermoplastic over-mold layer on at least a part of the exterior surface of the preform. In one aspect the invention can be a perform that is made by over-molding the thermoplastic layer onto the preform surface in one or more over-molding operations. In a single over-molding embodiment the preform has a body layer of a first color and the over-molded layer of a second color. The over-mold layer can have a thickness gradient varying in thickness from one end of the preform to adjacent another end of the preform. This will give the blow molded container a unique appearance where there the container will be substantially transparent or of a first color and the over-mold layers of differing colors.
Claims11
A preform having a first end and a second end, the preform having a preform body layer having an outer surface and a plurality of thermoplastic over-mold layers overmolded directly to the outer surface of the preform body layer, the outer surface being smooth and continuous, the plurality of thermoplastic over-mold layers being of different colors from one another, a portion of the outer surface of the preform body layer without an over-mold layer, and at least one of the plurality of thermoplastic over-mold layers having a thickness gradient.
Dependencies are inferred from the claim text.