Patent ID: 8992708
Filing Date: 2015-03-31
Classification: B29C,B31F,C08F,C09D,C09J,D21H,Y10T

Abstract:
1. A method of manufacturing a corrugated fiberboard wherein the corrugated fiberboard includes at least one corrugated sheet of paper and at least one flat linerboard, said method comprising corrugating a sheet of paper at paper temperatures below 95° C. and at a lineal speed of above 150 m/min; applying a corrugated board adhesive to the corrugated sheet of paper in a continuous operation immediately after production of the corrugation of the corrugated sheet of paper, and adhering the corrugated sheet of paper to at least one first linerboard, wherein: the corrugated board adhesive is an aqueous adhesive dispersion consisting of at least one synthetic, dispersed polymer, and optionally at least one additional component selected from the group consisting of starch, a flow control agent, a thickener, a defoamer, a wetter, a tackifier, and an inorganic filler, each synthetic, dispersed polymer comprises 19.9 to 80 parts by weight of at least one of a vinyl aromatic monomer and a conjugated aliphatic diene, 0.1 to 15 parts by weight of an acrylate monomer, and 0.1 to 15 parts by weight of ethylenically unsaturated acid, each monomer unit present in amounts relative to 100 parts by weight of the monomers present in each synthetic, dispersed polymer, each synthetic, dispersed polymer is obtained by emulsion polymerization in at least the presence of water and an emulsifier, the synthetic, dispersed polymer has a glass transition temperature above 25° C. and below the surface temperature of the corrugated sheet of paper to which they are applied, and the aqueous adhesive dispersion has a pH of from 4.0 to 5.6.