| 摘要 |
PROBLEM TO BE SOLVED: To manufacture a waste paper board which is gentle for environment and can be reused as raw material after use by a method wherein a mixture of waste paper pulp granular material in which a specific amount of water is added to waste paper pulp fibrillated in a dry state to be made spongy, and fibrous or powdery synthetic resin having thermoplasticity, is heated, pressurized, and molded. SOLUTION: After coarsely crushing, for example, waste newspaper with a pulp coarse crusher, it is fibrillated by a dry process with a pulp grinder, and waste paper pulp is obtained. 10-100 pts.wt. of atomized water is added based on 100 pts.wt. of waste paper pulp while the waste paper pulp is agitated, and spongy waste paper pulp is obtained. Thereafter, agitation strength is decreased, fibrous or powdery thermoplastic resin is added to be made stuck almost uniformly onto a surface of the spongy waste paper pulp, and composite granular matter is obtained. Then, the composite granular matter is laminated between a hot press machine, and held by a specific pressure at a specific temperature to obtain a waste paper board. |
