Production of base material for light-weight chipboard or fibre-board, involves mixing cellulose-containing powder, e.g. corn flour, with a hardener such as poly-isocyanate and then foaming and hardening the mixture

摘要

A method for the production of a base material (I) containing preferably finely-divided cellulose- and/or lignocellulose-containing material (II), involves (a) adding a foam-forming, at least partly duromer-crosslinking hardening substance (III) to the material (II), (b) homogenising the mixture with impregnation of (II), (c) foaming the mixture with an increase in volume and (d) hardening the expanded mixture. An independent claim is included for a base material (I) with a hardened, crosslinked foam structure containing a homogeneously dispersed substance impregnating the material.