ADDITIVE MATERIAL FOR SYNTHETIC WOOD, METHOD OF MANUFACTURING THE SAME, MOLDING MATERIAL FOR SYNTHETIC WOOD CONTAINING THE ADDITIVE MATERIAL AND SYNTHETIC WOOD

摘要

PROBLEM TO BE SOLVED: To obtain an additive material which can improve strength of synthetic wood from waste plastic recovered as construction waste materials. SOLUTION: The waste plastic which is recovered as construction waste material, contains at least partially constituted part with PET and in which a plurality of kinds of molded products are mixed is crushed into the fibrous crushed materials having a thickness of 8-50μm and the length of 1-30 mm with a crushing process (process 1); removed foreign matters by a wet specific gravity screening (process 4); and dried (process 5). The fibrous crushed materials after drying is subjected to dry cleaning by further adding a shock friction force when needed (process 6). Thereby an additive material (fibrous crushed materials) in which the content of PET is 15-30 wt.%, preferably 20 wt.% and the content of ash is 10-15 wt.% is obtained. The synthetic wood having an improved strength is obtained when a synthetic wood is formed by adding the additive material to a thermoplastic resin having a melting temperature less than the melting temperature of the PET together with wooden powder at a temperature less than the melting temperature of the PET. COPYRIGHT: (C)2011,JPO&INPIT