TONER FOR DEVELOPING ELECTROSTATIC CHARGE IMAGE

摘要

PROBLEM TO BE SOLVED: To provide toner which secures sufficient fixing temperature width by optimally dispersing wax in resin excellent in low-temperature fixing performance, and which is excellent in thermal preservable property and whose productivity is high by restraining the deterioration of durability and the deterioration of transfer performance which easily cause trouble by incorporating the wax. SOLUTION: The toner for developing an electrostatic charge image is the toner incorporating at least the resin A, the resin B and the wax, which are incompatible with each other and take phase separation structure in a sea island state, obtained by dispersing the resin B like an island in the sea-like resin A being continuous phases, and including the wax in the island-like resin B. The softening temperature TmA of the resin A is higher than the softening temperature TmB of the resin B, and the absolute value of the difference of the logarithm of melt viscosity between the resin A and the resin B within the temperature range from TmB to TmA is <=2.