| 摘要 |
<p>The specification discloses paperboard having a water-repellant coating which includes a polymer matrix/wax mixture and which 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 figure illustrates a repulpable, water-repellant paperboard (12) coated with the water-repellant coating (26). The coated board exhibits improved release characteristics and resistance to blocking, making it particularly well-suited in corrugated box constructions used in the shipping of perishable food items such as meats, poultry, fish products, fruits and vegetables.</p> |
