E.i. Dupont De Nemours and Company

James Adolph Robertson

Horacio E Bergna

Robert L Adelman

In a double-pass lamination and coating process, aluminum foil is laminated on one side with paper and then rolled for temporary storage before being coated on the other side with polyethylene. Contaminants from the paper impair the ability of aqueous solutions of chromium complex adhesion promoters to bond the polyethylene to the foil. A wash coat of polyvinyl alcohol before rolling eliminates this impairment.

Foil coating process

Filled polyolefin compositions having silicate mineral fillers coupled into the resin by means of certain coordination complexes, particularly fumarato chromium nitrate. Polyethylene or polypropylene resins with talc or kaolin fillers are preferred. Processes are also provided.

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West Chester, PA, United States of America

James Adolph Robertson