Method of molding plastic products having chemically bonded protective coatings
AssigneeLibbey-Owens-Ford Co.
InventorsJames E. Matzinger, Robert D. Kroshefsky, William R. Weaver
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Abstract
Coated plastic products are prepared by chemically bonding a protective coating material to at least a portion of the surface of a plastic substrate, by disposing a web of a protective coating material over the cavity of a mold, and thereafter injecting polymeric precursor materials into the mold behind the web thereby conforming the web to the surface of the mold cavity. As the polymeric precursor materials react in situ to form the plastic substrate, they also chemically bond to the protective coating material.
Claims18
A process for preparing a coated plastic product, including a plastic substrate having chemically bonded to at least a portion of the surface thereof a protective coating material, comprising the steps of:
- (A) providing a mold, including at least two cooperating mold sections, having a cavity therein for forming the plastic substrate, wherein at least a portion of the cavity defined a mold cavity surface adjacent which a finished surface of the plastic product is to be molded;
- (B) disposing a film of the protective coating material across the mold cavity surface;
- (C) closing the mold;
- and
- (D) injecting polymeric precursor materials into the cavity behind the protective coating material, whereby the polymeric precursor materials fill the mold cavity, simultaneously deform the protective coating material to substantially conform to the mold cavity surface, and react in situ to form the plastic substrate and simultaneously chemically react with the protective coating material at the interface therewith to chemically bond said plastic substrate to the protective coating material and form an integral, composite, coated plastic product.
Dependencies are inferred from the claim text.