Cleaning blade, process cartridge, and image forming apparatus
View Patent ↗Provided is a cleaning blade for cleaning a surface of an image holding member, including a contact member that contacts the surface of the image holding member at a corner portion of a tip end of the cleaning blade, wherein, when the position of the corner portion in a state where the image holding member is stopped is set to be a standard, a movement distance of the cleaning blade to the position of the corner portion in a state where the image holding member is driven is from 10 μm to 30 μm.
1. A cleaning blade for cleaning a surface of an image holding member, comprising:
a contact member that contacts the surface of the image holding member at a corner portion of a tip end of the cleaning blade,
wherein, when the position of the corner portion in a state where the image holding member is stopped is set to be a standard, a movement distance of the cleaning blade to the position of the corner portion in a state where the image holding member is driven is from 10 μm to 30 μm, and
wherein an endothermic peak top temperature of the contact member is 180° C. to 220° C.
2. The cleaning blade according to claim 1 ,
wherein the cleaning blade comprises:
a contact member that forms a region including a portion contacting at least the image holding member and in which a coefficient of kinetic friction between the cleaning blade and the surface of the image holding member is from 0.4 to 1.2 and a Young's modulus is from 12 MPa to 28 MPa; and
a non-contact member that forms a region other than the contact member and is formed of a different material from that of the contact member and in which rebound resilience at 25° C. is from 35% to 55%.
3. The cleaning blade according to claim 2 ,
wherein the JIS A hardness of the non-contact member is lower than the JIS A hardness of the contact member.
4. The cleaning blade according to claim 2 ,
wherein the Young's modulus of the contact member is from 15 MPa to 21 MPa.
5. The cleaning blade according to claim 2 ,
wherein the coefficient of kinetic friction between the cleaning blade and the image holding member is from 0.6 to 0.8.
6. The cleaning blade according to claim 2 ,
wherein the contact member is selected from polyurethane rubber, silicon rubber, fluorine rubber, chloroprene rubber, and butadiene rubber.
7. The cleaning blade according to claim 1 ,
wherein the movement distance is from 10 μm to 15 μm.
8. The cleaning blade according to claim 1 ,
which has a blade free length of from 6.0 mm to 8.0 mm.
9. The cleaning blade according to claim 1 ,
which has a thickness of from 1.5 mm to 2.0 mm.
10. The cleaning blade according to claim 1 ,
wherein the contact member is selected from polyurethane rubber, silicon rubber, fluorine rubber, chloroprene rubber, and butadiene rubber.
11. A process cartridge detachable from an image forming apparatus, the process cartridge comprising:
an image holding member on a surface of which a toner image is formed; and
the cleaning blade according to claim 1 .
12. The process cartridge according to claim 11 ,
wherein the cleaning blade comprises:
a contact member that forms a region including a portion contacting at least the image holding member and in which a coefficient of kinetic friction between the cleaning blade and the surface of the image holding member is from 0.4 to 1.2 and a Young's modulus is from 12 MPa to 28 MPa; and
a non-contact member that forms a region other than the contact member and is formed of a different material from that of the contact member and in which rebound resilience at 25° C. is from 35% to 55%.
13. The process cartridge according to claim 12 ,
wherein in the cleaning blade, the JIS A hardness of the non-contact member is lower than the JIS A hardness of the contact member.
14. An image forming apparatus comprising:
an image holding member;
a charging device that charges the image holding member;
an electrostatic latent image forming device that forms an electrostatic latent image on a surface of a charged image holding member;
a developing device that develops the electrostatic latent image formed on the surface of the image holding member using toner to form a toner image;
a primary transfer device that transfers the toner image formed on the image holding member to an intermediate transfer member;
a secondary transfer device that transfers the toner image that has been transferred to the intermediate transfer member to a recording medium; and
the cleaning blade according to claim 1 .
15. The image forming apparatus according to claim 14 ,
wherein the cleaning blade comprises:
a contact member that forms a region including a portion contacting at least the image holding member and in which a coefficient of kinetic friction between the cleaning blade and the surface of the image holding member is from 0.4 to 1.2 and a Young's modulus is from 12 MPa to 28 MPa; and
a non-contact member that forms a region other than the contact member and is formed of a different material from that of the contact member and in which rebound resilience at 25° C. is from 35% to 55%.
16. The image forming apparatus according to claim 15 ,
wherein in the cleaning blade, the JIS A hardness of the non-contact member is lower than the JIS A hardness of the contact member.
17. The cleaning blade according to claim 1 ,
wherein the contact member is polyurethane rubber containing a hard segment and a soft segment, and the average particle size of aggregates in the hard segment is from 5 μm to 20 μm.
18. The cleaning blade according to claim 1 ,
wherein a weight ratio of the material configuring the hard segment is in a range of from 10% by weight to 30% by weight, with respect to a total weight of the hard segment material and the soft segment material.