To provide a jointing structure and the bonding process of a woody system material having a strong adhesive strength and excellent dimension stability in an adhesive bondage of a woody system material with a PEG type adhesive agent at a low cost and further, as a result, to be capable of manufacturing a novel woody board from a periodic thinning, etc. at a commercial scale.
The process of a woody board includes (1) the process of a woody element from a woody material, (2) the process of subjecting the woody element to ozone treatment, (3) the process of coating an adhesive agent (PEG type adhesive agent) containing polyethylene glycol as a main ingredient to the ozone-treated woody element, and (4) the process of forming the woody element obtained in the above process (3), followed by pressing under heating.
TSUNODA ATSUSHI
TANAKA KEIJI
YASUDA OSAMU
SHINWA MOKUZAI KOGYO KK
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