| 摘要 |
PURPOSE:To improve the fluidity of a toner without affecting the electrostatic chargeability thereof by using the toner which is held stuck with polymethylsilsesquioxane resin powder. CONSTITUTION:The heating temp. for the toner is required to be the temp. at which the scorch and property deterioration of paper do not arise. A binder resin of a low softening temp. is used for this purpose. The resin having the low softening temp. condenses by easily receiving the influence of heat, moisture, pressure, etc. Blocking and caking are inevitably liable to arise with such resin. This toner is thereupon provided with the fluidity by interposing the pulverous polymethylsilsesquioxane powder having >=500 deg.C softening temp. and several mum grain size between the toner particles. Since the pulverous polymethylsilsesquioxane particles are used to the extent of sprinkling the same on the toner, the use of said particles at 0.01-3wt% of the toner weight suffices. These pulverous particles are electrostatically stuck to the toner. The electrostatic chargeability is not affected at all even if such stuck material exists in the toner. |
