Process cartridge and image forming method using toner having properties for high image quality

摘要

Provided is a process cartridge by which the stability of an image having a high print percentage can be obtained even when high-density loading is performed. The process cartridge is a process cartridge in which a toner having a uniaxial collapse stress at the time of a maximum consolidation stress of 10.0 kPa of 2.0 kPa or more and 4.5 kPa or less, and a total energy measured after its compression of 70 mJ or more and 95 mJ or less is stored in a toner container in a state in which the container has a loading density of 0.70 g/cm3 or more.

主权项

1. A process cartridge, which is detachably mountable to a main body of an image forming apparatus, the process cartridge comprising:
an electrostatic image-bearing member; a charging member for charging the electrostatic image-bearing member; a toner container; a toner stored in the toner container, and a developing device for developing an electrostatic image formed on a surface of the electrostatic image-bearing member with the toner, wherein:
the toner container has arranged therein a member for stirring the toner;the toner has a uniaxial collapse stress, at a time of a maximum consolidation stress of 10.0 kPa, of 2.0 kPa or more and 4.5 kPa or less, and the toner is stored in the toner container in a state in which the container has a loading density of 0.70 g/cm3 or more; andin a test involving vertically entering a rotating blade, which is rotating at a peripheral speed of 50 mm/sec. and has a diameter of 23.5 mm, into a toner layer formed by compressing the toner without aeration, a total energy of the toner, which is a total sum of a rotational torque of the blade and a vertical load needed for vertically entering the blade, is 70 mJ or more and 95 mJ or less.