Process cartridge and electrophotographic apparatus
The process cartridge is a process cartridge to be removably mounted onto a main body of an electrophotographic apparatus, the process cartridge including: an electrophotographic photosensitive member; a toner; and a developing member, wherein the electrophotographic photosensitive member includes a surface layer that is a polymerized film of a composition containing at least one kind of monofunctional (meth)acrylic compound selected from the group consisting of: a monofunctional (meth)acrylic monomer; and a monofunctional (meth)acrylic oligomer, and at least one kind of tri- or higher functional (meth)acrylic compound selected from the group consisting of: a tri- or higher functional (meth)acrylic monomer; and a tri- or higher functional (meth)acrylic oligomer, wherein the toner contains a toner particle and a hydrotalcite particle as an external additive, and wherein the hydrotalcite particle contains fluorine in filter fitting analysis of STEM-EDS analysis.
1. A process cartridge configured to be removably mounted onto a main body of an electrophotographic apparatus, the process cartridge comprising:
an electrophotographic photosensitive member;
a toner; and
a developing member configured to supply the toner to the electrophotographic photosensitive member;
the electrophotographic photosensitive member having a surface layer that is a polymerized film of a composition containing (i) at least one kind of monofunctional (meth)acrylic compound selected from the group consisting of a monofunctional (meth)acrylic monomer and a monofunctional (meth)acrylic oligomer, and (ii) at least one kind of tri- or higher functional (meth)acrylic compound selected from the group consisting of a tri- or higher functional (meth)acrylic monomer and a tri- or higher functional (meth)acrylic oligomer;
the surface layer comprising a diphenylamine compound represented by formula (A3)
where R 301 to R 310 independently represent a hydrogen atom, a methyl group or an ethyl group, wherein
a content ratio of the diphenylamine compound in the surface layer is 0.001 to 1.0 mass % with respect to a total mass of the surface layer,
the toner contains a toner particle and a hydrotalcite particle as an external additive, and
the hydrotalcite particle contains fluorine in filter fitting analysis of STEM-EDS analysis.
2. The process cartridge according to claim 1 , wherein a is 20 to 500 mass % when “a” is a content ratio of the monofunctional (meth)acrylic compound to the tri- or higher functional (meth)acrylic compound in the composition.
3. The process cartridge according to claim 2 , wherein the surface layer has an elastic deformation rate of 35 to 50%.
4. The process cartridge according to claim 1 , wherein b is 0.010 to 3.000 mass % when “b” is a content ratio of the hydrotalcite particle to the toner.
5. The process cartridge according to claim 1 , wherein the hydrotalcite particle contains magnesium and aluminum in the filter fitting analysis of the STEM-EDS analysis, and
in the filter fitting analysis of the STEM-EDS analysis an element ratio (atomic number concentration ratio) of the magnesium to the aluminum is 1.5 to 4.0.
6. The process cartridge according to claim 5 , wherein in the filter fitting analysis of the STEM-EDS analysis an element ratio (atomic number concentration ratio) of the fluorine to the aluminum in the hydrotalcite particle is 0.03 to 0.70.
7. The process cartridge according to claim 1 , wherein the fluorine is present inside the hydrotalcite particle in line analysis of the STEM-EDS analysis.
8. The process cartridge according to claim 1 , wherein 100≤a/b≤4,000 when “a” is a content ratio of the monofunctional (meth)acrylic compound to the tri- or higher functional (meth)acrylic compound in the composition, and “b” is a content ratio of the hydrotalcite particle to the toner in the toner.
9. The process cartridge according to claim 1 , wherein the monofunctional (meth)acrylic compound includes a charge-transporting site.
10. The process cartridge according to claim 9 , wherein the charge-transporting site includes a triarylamine site.
11. The process cartridge according to claim 10 , wherein the monofunctional (meth)acrylic compound is represented by one of formulae (A1) or (A2)
where R 101 to R 119 independently represent a hydrogen atom, a methyl group or an ethyl group, “m” and “n” independently represent an integer of 0 to 5, R 201 to R 219 independently represent a hydrogen atom, a methyl group or an ethyl group, and “p” and “q” independently represent an integer of 0 to 5.
12. The process cartridge according to claim 1 , wherein the content ratio of the diphenylamine compound in the surface layer is 0.1 mass % or less with respect to the total mass of the surface layer.
13. The process cartridge according to claim 1 , wherein the surface layer contains a particle A, and particle A comprises a metal atom.
14. The process cartridge according to claim 13 , wherein the particle A is a metal oxide particle.
15. The process cartridge according to claim 14 , wherein the metal oxide particle is an alumina particle.
16. The process cartridge according to claim 13 , wherein a content ratio of particle A in the surface layer is 4 to 16 mass % with respect to a total mass of the surface layer.
17. An electrophotographic apparatus comprising a process cartridge configured to be removably mounted onto a main body of the electrophotographic apparatus, the process cartridge comprising:
an electrophotographic photosensitive member;
a toner; and
a developing member configured to supply the toner to the electrophotographic photosensitive member;
the electrophotographic photosensitive member having a surface layer that is a polymerized film of a composition containing (i) at least one kind of monofunctional (meth)acrylic compound selected from the group consisting of a monofunctional (meth)acrylic monomer and a monofunctional (meth)acrylic oligomer, and (ii) at least one kind of tri- or higher functional (meth)acrylic compound selected from the group consisting of a tri- or higher functional (meth)acrylic monomer and a tri- or higher functional (meth)acrylic oligomer;
the surface layer comprising a diphenylamine compound represented by formula (A3)
where R 301 to R 310 independently represent a hydrogen atom, a methyl group or an ethyl group, wherein
a content ratio of the diphenylamine compound in the surface layer is 0.001 to 1.0 mass % with respect to a total mass of the surface layer,
the toner contains a toner particle and a hydrotalcite particle as an external additive, and
the hydrotalcite particle contains fluorine in filter fitting analysis of STEM-EDS analysis.