| 摘要 |
PROBLEM TO BE SOLVED: To develop a method for manufacturing a timber chip board capable of integrally forming the timber chip board in precise steps by utilizing characteristics of timber chips and a phenol resin. SOLUTION: The method for manufacturing the timber chip board comprises the steps of drying the timber chips to a water content of 4 wt.% or less, dipping the chips in a phenol resin tank, impregnating the chips with the phenol resin to 20 to 40 wt.% or more, and covering both or one of the front and rear surfaces of the filler with a front surface material of a woody material having excellent permeability of the phenol resin. The method further comprises (a) a step of expediting temperature raising under a pressure by a hot press, (b) a step of stopping the temperature raising, holding the temperature at about 100 deg.C, bringing about softening of the phenol resin, expediting impregnation of an outside surface material with the resin and bringing about a composition change by compressing at the timber chips, and (c) a step of restarting temperature raising to expedite a curing reaction by molecular crosslinking of the resin to obtain the integrated timber chip board.
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