| 摘要 |
PURPOSE:To obtain a toner with an improved fixing property and with hardly generating the offset, as well by incorporating a specified fixing resin and a coloring agent, and making at least >=1 region where the gradient of viscosity (absolute value) of the toner in a specified temp. region is less than 0.030/ deg.C exist. CONSTITUTION:The toner incorporates the fixing resin and the coloring agent, and the fixing resin satisfies the range of 50,000-5,000,000 in the weight average molecular weight and the region where the gradient of the toner viscosity (absolute value) in a range of 100-150 deg.C is <=0.30/ deg.C, is present at least >=1. In this case, the toner particle melts adequately at the fixation and it can maintain the permeability and the flocculation property suitable to the fixation. Thus the improved toner excellent in the compatibility to a fixing roller, etc., and without easily peeling off from transfer paper and with the resistance to the offset property is obtained. |
