Method for laminating plastic films with wood-base substrates, in particular for producing high-gloss surfaces

A method for producing a wood-base substrate provided with a high-gloss surface by laminating a plastic film with a wood-base substrate, the method comprising laminating a plastic film with a wood-base substrate by applying a laminating agent there between and applying pressure and heat, thereby permanently bonding the plastic film to the wood-base substrate, the treatment of the plastic film with the laminating agent being effected over the whole area of the plastic film and homogeneously with uniform layer thickness in the range of from 1 to 1,000 μm, wherein the plastic film is formed so as to be transparent on its top, has a thickness of 0.005 to 15 mm and has, on its top, a gloss value, as determined according to DIN 67530 at an angle of measurement of 60°, in the range of from 100 to 200, and wherein the plastic film is an oriented plastic film and wherein the tensile strength of the plastic film in the longitudinal and transverse direction is at least 100 N/mm2 and wherein the modulus of elasticity of the plastic film in the longitudinal and transverse direction is at least 3,000 N/mm2 and wherein the elongation at break of the plastic film in the longitudinal and transverse direction is at least 90% and wherein the laminating agent is a transparent or colorless, extrudable or film-forming, solvent-free hot-melt adhesive, such that a wood-base substrate provided with a high-gloss surface is obtained, wherein a decorative layer is additionally arranged between the plastic film and the wood-base substrate, and wherein the lamination of the plastic film with the wood-base substrate is followed by a heat treatment subjecting the laminated material on its surface laminated with the plastic film to a temperature in the range of 50-100 degrees C. within 15 minutes after the lamination process.