| 摘要 |
PURPOSE:To improve adhesion, heat resistance, water resistance, and moldability by specifying the weight ratio of a resin component to a magnetic powder component and the ratio of poly-4-methyl-1-pentene and graft denaturation poly-4-methyl-1-pentene which are the components of the resin. CONSTITUTION:The weight ratio of a resin component to a magnetic powder component (resin component/magnetic powder component) is made to be 80/20-5/95, and the resin component is constituted from 80-99.99 pts.wt. of poly-4- methyl-1-pentene and 0.01-20 pts.wt. of graft denaturation poly-4-methyl-1-pentene. Further, the graft rate of the unsaturated carboxylic acid component or the unsaturated carboxylic acid derivative component of the graft denaturation poly-4-methyl-1-pentene is made to be in the range of 0.5-15wt.%, and the limit viscosity [eta] of the graft denaturation poly-4-methyl-1-pentene is made to be in the range of 0.3-10dl/g. Thus, the characteristics such as adhesive, heat resisting, water resisting, and molding properties are improved. |
