METHOD OF WOOD MODIFICATION Russian patent published in 1998 - IPC

FIELD: production processes in modification of wood physical properties in density and appearance, applicable in wood-working industry at manufacture of wood articles. SUBSTANCE: at preparation of blank to the process of modification of its physical properties the blank is impregnated with processing agent to a moisture content of 40 to 100%. Aqueous solution of adhesive is used as this agent. Then the blank is dried reducing its moisture content to 15 to 40%, and thermocompaction is performed placing the blank in a mould whose at least one of the dies has a relief image. Thermocompaction is carried out at P=80 to 1500 kg/sq.cm, T=80 to 110 C during t=100 to 300 C during t=2 to 30 min and then cooled down to Tcm²100 C, and then it is further processed, for example, an article is manufactured having a relief image on its surface, or the blank is mechanically worked with removal of the relief image to obtain a flat pattern with a stereoscopic opticity of its image. The offered method provides for modification of physical properties of wood irrespective of the structure of its material. EFFECT: improved physical properties of blanks for subsequent profitable use of them in production of various articles. 3 cl, 2 tbl