METHOD OF MANUFACTURING HIGH-STRENGTH PARTICLE BOARD

摘要

PROBLEM TO BE SOLVED: To manufacture a particle board which exhibits high bending strength and bending Young's modulus even in the particle board only composed of wooden chips. SOLUTION: The method of manufacturing the particle board 4 comprises: an impregnation process for impregnating wooden chips with an aqueous solution of resole-type phenol resin to obtain resin-impregnated chips; and a molding process of laminating mats of three layers made by combining a surface layer 1 and a back layer 2 obtained from resin-impregnated chips together with a core layer 3 to one another, heating and pressing the mats to mold the mats into a plate shape, wherein, in the impregnation process, an aqueous solution of the phenol resin having a weight-average molecular weight in the range of 300 to 700 is supplied so as to obtain the resin-impregnated chips of the surface layer 1 and the back layer 2 to provide the resin-impregnated chips containing 15 to 80 pts.mass of resin solid content per 100 pts.mass of bone-dry amount of wooden chip to manufacture the particle board. COPYRIGHT: (C)2010,JPO&INPIT