| 摘要 |
PURPOSE:To improve physical properties of a synthetic resin and to reduce the cost of a composition for molding, by mixing and grinding a compressed and ground chaff and the synthetic resin and crushing them with water when the mixture of both components is about to become a lump from a semi-molten state. CONSTITUTION:A gap whose cross-sectional area is gradually decreased between an outer cylinder having a conical shape and a spiral screw rotating in facing against said outer cylinder is formed, and compressed and ground concreted chaffs or powdered chaffs are prepared by sending successively chaffts into said gap and pressing and heating them to destroy their tissue. This is pulverized, heated up to about 185 deg.C and heat-treated to remove water. This is then kept at elevated temp. for a definite time and thereafter cooled down. A thermoplastic or a thermoset resin is mixed with the chaffs and the mixture is ground. When the mixture of the compressed and ground chaff and the synthetic resin is about to become to a lump from a semi-molten state with the frictional heat, the mixture is crushed with water and the water is evaporated. A granular or powder resin composition, wherein the compressed and ground chaff is impregnated with the synthetic resin, is thereby formed. |
