Repulpable, water repellant paperboard

Details Repulpable, water repellant paperboard Repulpable, water repellant paperboard

1993-09-28

1997-05-06

Bleutge, John C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Nonplanar uniform thickness material

428486, 428507, 428510, 428515, 442 84, B32B 906

Patent

active

056269455

ABSTRACT:
The specification discloses paperboard having a water-repellant coating which includes a polymer matrix/wax mixture and is applied to the paperboard as an aqueous formulation. The polymer matrix includes polymer chains which are ionically cross-linked through pendant carboxylic acid groups to provide, together with the wax, a substantially continuous, water-repellant film which more readily breaks down under the alkaline conditions of repulping. The coated board also exhibits improved release characteristics and resistance to blocking, and is particularly well-suited in corrugated box constructions used in shipping containers for perishable food items such as meats, poultry, fishery products, fruits and vegetables.

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