| 摘要 |
PURPOSE:To prevent filling particles from flocculating and precipitating so that molding materials become lower in viscosity and higher in fluidity, by hydrophobicly treating the surfaces of the filling particles by means of hydrophobic agents. CONSTITUTION:Surfaces of the filling particles are treated by means of hydrophobic agents. As raw materials for filling, molding materials for an IC card, particularly silica and alumina, are used in general. As hydrophobic agents, any materials which provide hydrophobic property to the surfaces of the filling particles, particularly silylated agents, silane coupling agents, etc., can be used. Thus, the filling particles can be prevented from flocculating and precipitating, so that the molding materials become lower in viscosity and higher in fluidity. |
