Patent ID: 6652695
Filing Date: 2003-11-25
Classification: B27N,Y10T

Abstract:
A method of producing a pressed chip panel, comprising the following steps:a) providing a cover layer material comprising chips of wood or a wood-based material; b) providing a first middle layer material comprising chips of wood or a wood-based material; c) providing a second middle layer material comprising chips of a non-wood material of annual plants containing lignocellulose; d) mixing together said first middle layer material and said second middle layer material to form thereof a mixed middle layer material; e) before or after said step d), applying a first middle layer binder to said first middle layer material and applying a second middle layer binder comprising an isocyanate to said second middle layer material; f) applying to said cover layer material a cover layer binder that is different from said second middle layer binder and that comprises at least one of an amino polymer resin and a phenolic polymer resin; g) after said steps e) and f), depositing in sequence a lower layer of said cover layer material having said cover layer binder applied thereon, a middle layer of said mixed middle layer material having said first middle layer binder and said second middle layer binder applied thereon, and an upper layer of said cover layer material having said cover layer binder applied thereon, to form thereof a multi-layered mat body; and h) pressing said multi-layered mat body to form thereof said pressed chip panel.