Multilayer lightweight woodbase materials composed of lignocellulosic materials having a core and two outer layers with treated pulp, treated natural fibers, synthetic fibers or mixtures thereof in the core

Abstract

The present invention relates to lignocellulosic materials having a core and two outer layers, comprising, preferably consisting of, in the core A) 30 to 98% by weight of lignocellulose particles, B) 0 to 25% by weight of expanded plastics particles having a bulk density in the range from 10 to 150 kg/m3, C) 1 to 50% by weight of one or more binders selected from the group consisting of aminoplast resin, phenol-formaldehyde resin, and organic isocyanate having at least two isocyanate groups, and D) 0 to 10% by weight of additives and in the outer layers E) 70 to 99% by weight of lignocellulosic particles, fibers or mixtures thereof, F) 1 to 30% by weight of one or more binders selected from the group consisting of aminoplast resin, phenol-formaldehyde resin, and organic isocyanate having at least two isocyanate groups, and G) 0 to 10% by weight of additives in which 2% to 30% of the lignocellulose particles A) have been replaced by treated pulps, treated natural fibers, synthetic fibers or mixtures thereof, and also relates to their production and their use.

Dependencies are inferred from the claim text.