| 摘要 |
PURPOSE:To enhance production efficiency and to promote curing reaction by utilizing an adhesive having such a type wherein curing is promoted in the presence of acid. CONSTITUTION:Organic fiber is impregnated with acetic anhydride and they are allowed to react with each other, and thereby hydroxyl group in the organic fiber is acetylated. As adhesive having such a type wherein curing is promoted in the presence of acid is added to acetylated organic fiber. Furthermore the mixture is made airborne by hot air and thereafter foaming is performed. This mixture is thermally pressed and molded. As the utilized organic fiber, the chips of e.g. conifer such as pine, japanese cryptomeria and cypress or broad- leaved tree material such as lauan, kapok, chestling tree and poplar are fibfillated according to an ordinary method and this fibrillated fiber is dried. The obtained organic fiber is preferably utilized. Thereby an organic fiber plate can be efficiently produced which is excellent in dimension stability for absorption and discharge of moisture. |
