International Paper Company

Morton S Delozier

Gene W Bartholomew

James R Quick

Donna J Wenzel

Maxine Klass-Hoffman

William A Wittosch

Bruce Rose

David J Romanowicz

Mark D Peterson

Michael DeAngelis

Recyclable and repulpable coated paper stock, preferably for use as ream wrap, comprising a substrate coated on at least one surface with a base coat and at least one additional coat over said base coat. Both coats are water based dispersions of a polymer selected from the group consisting of acrylic polymers, acrylic copolymers, polyvinyl acetate, polyvinyl alcohol, ethylene-vinyl acetate, polyvinyl chloride, styrene butadiene copolymers, polyvinylidiene chloride and its copolymers, or starch. The wax free coating forms a pin-hole free continuous film on the substrate which is resistant to water and water vapor. The invention also includes processes for making and recycling the invented coated paper stocks.

Recyclable and repulpable ream wrap and related methods of manufacture

Recyclable and compostable coated paper stock comprising a substrate coated on at least one surface with a primer coat and a top coat both of which are water based dispersions. The primer coat comprises a water based dispersion of a polymer selected from the group comprising acrylic polymers, acrylic copolymers, polyvinyl acetate, polyvinyl alcohol, poly-ethylene vinyl acetate, poly-ethylene vinyl chloride, styrene butadiene copolymers, polyvinylidiene chloride or starch. The top coat comprises a water based dispersion of a polymer selected from the group comprising acrylic polymers, acrylic copolymers, styrene butadiene copolymers or polyvinylidiene chloride. In another embodiment the top coat further includes a wax component comprising 15-90 wt. % of the polymer and 5-85 wt. % of the wax. The substrate is coated with a primer coat prior to the application of the top coat to seal the substrate surface. The top coat forms a film over the primer coat and imparts water and grease resistant properties to the coated paper stocks. The invention also includes processes for making and using the invented coated paper stocks.

Recyclable and compostable coated paper stocks and related methods of

Recyclable paper stock comprising a substrate coated on at least one surface with a water based emulsion coating. The water based emulsion coating comprises 20-90 dry wt. % of an acrylic-styrene copolymer and 5-70 dry wt. % of a wax. In another embodiment a second water based emulsion coating comprised of an acrylic-styrene copolymer is coated on the substrate surface opposite the initial water based emulsion coating. The substrate may also be coated with a primer coat prior to the application of the water based emulsion coatings to seal the substrate surface. The invention also includes processes for making and using the invented acrylic coated paper stocks.

Recyclable acrylic coated paper stocks and related methods of manufacture

Paper and paperboard materials having enhanced biodegradability are produced by treatment of substrates with aqueous chemical solutions having properties which increase the decomposition of the substrates so treated. The chemical solutions consist of chemical nutrients which provide a source of alternate electron acceptors to enhance biodegradability through facultative anaerobic decomposition or chemical nutrients which, increase microbial growth on the paper or paperboard thereby enhancing decomposition of the paper or paperboard. The chemical solutions are absorbed and retained in the substrate or incorporated directly into a slurry of fibrous based material and formed into a paper product using paper making apparatus. In both instances, the methods enhance the biodegradability of the paper or paperboard so treated.

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Claryville, NY, United States of America

Morton S Delozier