song mouth coating and porage figure panels

摘要

The cut edges are coated with a solution or dispersion of a thermosetting resin, the viscosity of which is so adjusted that limited penetration into the porous parts of the cut edges takes place, and the coating is carried out in such a way that on subsequent curing (hardening) a smooth, coherent and impermeable layer is formed. The solution or dispersion contains a thermosetting resin precondensate, a thermoplastic resin, a hardener (curing agent), a filler and/or a pigment, and the solvent or dispersion medium is water. In particular, the sealing and coating of the porous cut edges of chipboard or compression-moulded fibreboard based on cellulose can be carried out simply and without expensive equipment and gives, without subsequent surface filling, a smooth surface which can be painted.