| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a toner that can achieve both low-temperature fixability and heat-resistant storage property, prevents transfer omission associated with the occurrence of aggregation of toner particles in a developing unit, and has excellent wear resistance.SOLUTION: There is provided a toner that includes a binder resin containing a block copolymer resin of a crystalline polyester resin and an amorphous polyester resin, where a spin-spin relaxation time (t50) at 50°C measured by pulse NMR of the toner is 0.05 msec. or less; a spin-spin relaxation time (t130) at 130°C when the toner is heated from 50°C to 130°C is 15 msec. or more; a spin-spin relaxation time (t'70) at 70°C when the toner is cooled from 130°C to 70°C is 1.00 msec. or less; and an image obtained through binarization processing of an intermediate value of the maximum value and minimum value of a phase image of the toner observed in a tapping mode AFM has a phase difference image with large phase difference and a phase difference image with small phase difference, and the phase difference image with large phase difference has a dispersion diameter of 150 nm or less.</p> |
