Image forming apparatus and process cartridge
AssigneeCanon Kabushiki Kaisha
InventorsTetsuya Kinumatsu, Mariko Yamashita, Daisuke Yoshiba, Michiyo Sekiya
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Abstract
An image forming apparatus comprising an electrophotographic photosensitive member and a developing device for supplying a toner onto the electrophotographic photosensitive member, the developing device having the toner, wherein the electrophotographic photosensitive member has a surface layer comprising a binder resin (A), the toner has a toner particle, the toner particle has a core comprising a binder resin (B) and a wax and a shell layer formed on a surface of the core, the binder resin (A) has a prescribed structure: the wax comprises a prescribed monoester compound: and a process cartridge.
Claims12
An image forming apparatus comprising:
- an electrophotographic photosensitive member;
- and
- a developing device for supplying a toner onto the electrophotographic photosensitive member, the developing device having the toner, wherein
- the electrophotographic photosensitive member has a surface layer comprising a binder resin (A),
- the toner has a toner particle,
- the toner particle has a core-shell structure having:
- a core comprising a binder resin (B) and a wax;
- and
- a shell layer formed on a surface of the core,
- the binder resin (A) has:
- a structure represented by a following formula (1);
- and
- a structure represented by a following formula (2):
- where, R11 and R21 each independently represent a hydrogen atom or a methyl group, R22 and R23 each independently represent a hydrogen atom, a methyl group, an ethyl group or a phenyl group, or R22 and R23 are linked to C between R22 and R23 shown in the formula (2) to form a cycloalkylidene group,
- the wax comprises a monoester compound represented by a following formula (3):
- R31—COO—R32 (3)
- where, R31 and R32 each independently represent an alkyl group having 10 to 30 carbon atoms.
A process cartridge attached detachably to a main body of an image forming apparatus,
- the process cartridge comprising:
- an electrophotographic photosensitive member;
- and
- a developing device for supplying a toner onto the electrophotographic photosensitive member, the developing device having the toner, wherein
- the electrophotographic photosensitive member has a surface layer comprising a binder resin (A),
- the toner has a toner particle;
- the toner particle has a core-shell structure having:
- a core comprising a binder resin (B) and a wax;
- and
- a shell layer formed on a surface of the core,
- the binder resin (A) has:
- a structure represented by a following formula (1);
- and
- a structure represented by a following formula (2):
- where, R11 and R21 each independently represent a hydrogen atom or a methyl group, R22 and R23 each independently represent a hydrogen atom, a methyl group, an ethyl group or a phenyl group, or R22 and R23 are linked to C between R22 and R23 shown in the formula (2) to form a cycloalkylidene group, and
- the wax comprises a monoester compound represented by a following formula (3):
- R31—COO—R32 (3)
- where, R31 and R32 each independently represent an alkyl group having 10 to 30 carbon atoms.
Dependencies are inferred from the claim text.