| 摘要 |
PURPOSE:To prevent liberation of an inorganic particulate and to improve cleaning ability and stability of chargeability by containing a composite particulate having >=25% sticking ratio of the inorganic particulate to a surface of a resin particulate. CONSTITUTION:The composite particulate is made to stick the inorganic particulate on the surface of the resin particulate and sticking ratio of the inorganic particulate to the surface of the resin particulate is 25-100%. This range of sticking ratio is preferably 40-8O% to sufficiently prevent liberation of the inorganic particulate from the resin particulate. But in the case of >=25% of sticking ratio, sticking of the inorganic particulate becomes insufficient to easily liberate. When specific surface area of the resin particulate is Sa, specific surface area of the inorganic particulate is Sb, specific surface of the composite particulate after the inorganic particulate is stick on the surface of the resin particulate is Sh and additive ratio of the inorganic particulate is X, sticking ratio is expressed by the formula I. |
