Patent ID: 7745011
Filing Date: 2010-06-29
Classification: D21H,Y10T

Abstract:
1. A water-resistant and strengthened repulpable corrugated cardboard, having plies comprised of at least one outer liner and a fluting with at least one side of one of such plies having a water resistant flexible film formed from an aqueous coating composition comprising from about 10 to 70 wt % of a water-soluble sodium silicate in the form of a colorless, odorless viscous aqueous liquid with a density between about 1.39-1.40 g/cm from about 10 to 50 wt % of an aqueous emulsion of paraffin wax containing about 40-60% solids; and from about 10 to 60 wt % of a styrene-butadiene latex resin emulsion.