| 摘要 |
PURPOSE:To realize the improvements of the development characteristics and the transfer characteristics by imparting a flowability without damaging the stability of the electrostatic chargeability of a toner with a lower triboelectrification improver having a specific absolute value when it is triboelectrified with a carrier as a flow improver. CONSTITUTION:The covered resin is the resin that a nitrogen containing compound incorporating 3-30 carbon atoms for one nitrogen atom is added 0.3-15wt. parts to organic resins of 100wt. parts incorporating 30-50wt.% of a fluoro resin triboelectrifying at the same polarity as the toner and having a lower surface free energy and the flow improver is an improver of lower triboelectrification having an absolute value of <=30muc/g for the carrier. As the nitrogen containing compound being used, general compounds such as compounds having an amine structure represented with formula, compounds having a pyridine ring structure can be used. In this formula, R1, R2, and R3 represent independently hydrogen, aliphatic hydrocarbon group or aromatic hydrocarbon group. |
