| abstract |
[PROBLEMS] To improve the stability at the time of storage of an output image by improving durability against a mechanical impact while being a toner containing a crystalline resin, and to reduce cracking and chipping and to prevent contamination of a member. By suppressing and preventing toner clogging, a toner capable of obtaining a high-quality image over a long period of time and further improving the maintenance-free property of the electrophotographic apparatus. A toner having toner particles containing a binder resin, the binder resin containing a block polymer obtained by chemically bonding a crystalline polyester resin and an amorphous polyurethane resin as a main component. The binder resin contains a specific amount of a crystalline polyester resin component, the ester bond concentration derived from the crystalline polyester resin component in the binder resin is 5.2 mmol / g or less, and the toner is bent at three points. A toner in which the maximum value EMAX and the strain energy u of the flexural modulus E required in the test are specific values. [Selection figure] None |