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1
US10209637B2
Publication/Patent Number: US10209637B2
Publication date: 2019-02-19
Application number: 15/663,421
Filing date: 2017-07-28
Abstract: An electrophotographic photosensitive member includes a support, a charge generating layer containing a charge generation material, and a charge transporting layer containing a charge transport material in this order, the charge transporting layer serving as a surface layer. The charge transporting layer contains a polycarbonate resin having a particular structural unit. An electrophotographic photosensitive member includes a support, a charge generating layer containing a charge generation material, and a charge transporting layer containing a charge transport material in this order, the charge transporting layer serving as a surface layer. The ...more ...less
2
US2019163118A1
Publication/Patent Number: US2019163118A1
Publication date: 2019-05-30
Application number: 16/196,106
Filing date: 2018-11-20
Abstract: Provided are a process cartridge and an electrophotographic apparatus each suppressed in fluctuation in charging potential at the time of its long-term use. The process cartridge includes: an electrophotographic photosensitive member having a surface layer containing a resin and a charge-transporting substance; and a charging member configured to charge the electrophotographic photosensitive member, wherein an average of Martens hardnesses of the surface layer of the electrophotographic photosensitive member measured at a pushing force of 7 mN is 245 N/mm2 or more, and wherein in a core defined by three-dimensional surface texture standards (ISO 25178-2:2012) of the surface of the charging member, an average of Martens hardnesses measured at a pushing force of 0.04 mN is 2 N/mm2 or more and 20 N/mm2 or less, and an average of adhesivenesses measured with a scanning probe microscope in a field of view of 2-micrometer square is 70 mV or less. Provided are a process cartridge and an electrophotographic apparatus each suppressed in fluctuation in charging potential at the time of its long-term use. The process cartridge includes: an electrophotographic photosensitive member having a surface layer containing a resin and ...more ...less
3
US2019163119A1
Publication/Patent Number: US2019163119A1
Publication date: 2019-05-30
Application number: 16/198,008
Filing date: 2018-11-21
Abstract: Provided is a process cartridge having a charging member and an electrophotographic photosensitive member to be charged by being in contact with the charging member, wherein the electrophotographic photosensitive member has a support and a photosensitive layer in this order, and a surface layer of the electrophotographic photosensitive member has a Martens hardness of 230 N/mm2 or less. Provided is a process cartridge having a charging member and an electrophotographic photosensitive member to be charged by being in contact with the charging member, wherein the electrophotographic photosensitive member has a support and a photosensitive layer in this order, and ...more ...less
4
US2019163120A1
Publication/Patent Number: US2019163120A1
Publication date: 2019-05-30
Application number: 16/198,105
Filing date: 2018-11-21
Abstract: A process cartridge configured to be detachably attachable to a main body of an electrophotographic image forming apparatus, in which an occurrence of an image failure is suppressed, wherein the process cartridge includes an electrophotographic photosensitive member and a cleaning member arranged in contact with the electrophotographic photosensitive member, wherein an elastic deformation modulus of a surface layer of the electrophotographic photosensitive member is 35% or larger, and the cleaning member is formed of a urethane foam, wherein a density of the urethane foam is 200 to 500 kg/cm3, and a 25% compressive load of the urethane foam is 0.3 MPa or smaller. A process cartridge configured to be detachably attachable to a main body of an electrophotographic image forming apparatus, in which an occurrence of an image failure is suppressed, wherein the process cartridge includes an electrophotographic photosensitive member and a ...more ...less
5
US10416581B2
Publication/Patent Number: US10416581B2
Publication date: 2019-09-17
Application number: 15/667,715
Filing date: 2017-08-03
Abstract: An electrophotographic photosensitive member with suppressed potential variation even in the case that a protective layer including a cured material of a composition having a polymerizable functional group is used is provided. An electrophotographic photosensitive member including a support, a charge generation layer, a charge transport layer containing a charge transporting material, and a protective layer, in the order presented, wherein the charge transport layer contains a polycarbonate resin having a structure selected from a group A and a structure selected from a group B, and the protective layer includes a cured material of a composition containing a compound having at least a functional group selected from chain-polymerizable functional groups and sequential polymerizable functional groups. An electrophotographic photosensitive member with suppressed potential variation even in the case that a protective layer including a cured material of a composition having a polymerizable functional group is used is provided. An electrophotographic photosensitive member ...more ...less
6
US2019121251A1
Publication/Patent Number: US2019121251A1
Publication date: 2019-04-25
Application number: 16/230,617
Filing date: 2018-12-21
Abstract: An electrophotographic photosensitive member includes a support, a charge generating layer containing a charge generation material, and a charge transporting layer containing a charge transport material in this order, the charge transporting layer serving as a surface layer. The charge transporting layer contains a polycarbonate resin having a particular structural unit. An electrophotographic photosensitive member includes a support, a charge generating layer containing a charge generation material, and a charge transporting layer containing a charge transport material in this order, the charge transporting layer serving as a surface layer. The ...more ...less
7
JP2018045138A
Publication/Patent Number: JP2018045138A
Publication date: 2018-03-22
Application number: 2016180807
Filing date: 2016-09-15
Assignee: CANON INC
Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor having excellent electrical characteristics, with endurance potential variations reduced.SOLUTION: A electrophotographic photoreceptor has a support, a charge generating layer, and a charge transportation layer, in the stated order, the charge transportation layer containing a polycarbonate resin having a structural unit represented by formula (1). In the charge transportation layer, the content of a compound having a phenolic hydroxyl group is 500 ppm or less.SELECTED DRAWING: None PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor having excellent electrical characteristics, with endurance potential variations reduced.SOLUTION: A electrophotographic photoreceptor has a support, a charge generating layer, and a charge transportation ...more ...less
8
US2018059558A1
Publication/Patent Number: US2018059558A1
Publication date: 2018-03-01
Application number: 15/667,715
Filing date: 2017-08-03
Abstract: An electrophotographic photosensitive member with suppressed potential variation even in the case that a protective layer including a cured material of a composition having a polymerizable functional group is used is provided. An electrophotographic photosensitive member including a support, a charge generation layer, a charge transport layer containing a charge transporting material, and a protective layer, in the order presented, wherein the charge transport layer contains a polycarbonate resin having a structure selected from a group A and a structure selected from a group B, and the protective layer includes a cured material of a composition containing a compound having at least a functional group selected from chain-polymerizable functional groups and sequential polymerizable functional groups. An electrophotographic photosensitive member with suppressed potential variation even in the case that a protective layer including a cured material of a composition having a polymerizable functional group is used is provided. An electrophotographic photosensitive member ...more ...less
9
DE102017117241A1
Publication/Patent Number: DE102017117241A1
Publication date: 2018-02-01
Application number: 102017117241
Filing date: 2017-07-31
Abstract: Ein elektrophotographisches photosensitives Element beinhaltet einen Träger
10
JP2018036630A
Publication/Patent Number: JP2018036630A
Publication date: 2018-03-08
Application number: 2017158076
Filing date: 2017-08-18
Assignee: CANON INC
Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor which suppresses fluctuation in potential even when a protective layer formed of a cured product of a composition having a polymerizable functional group is used.SOLUTION: An electrophotographic photoreceptor has a support, a charge generating layer, a charge transport layer containing a charge transport substance and a protective layer in this order, where the charge transport layer contains a polycarbonate resin having a structure selected from group A and a structure selected from group B, and the protective layer is formed of a cured product of a composition containing a compound having at least one polymerizable functional group selected from a chain polymerizable functional group and a sequential polymerizable functional group.SELECTED DRAWING: None PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor which suppresses fluctuation in potential even when a protective layer formed of a cured product of a composition having a polymerizable functional group is used.SOLUTION: An electrophotographic photoreceptor ...more ...less
11
JP2018025780A
Publication/Patent Number: JP2018025780A
Publication date: 2018-02-15
Application number: 2017144953
Filing date: 2017-07-26
Assignee: CANON INC
Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor that is excellent in durability and has sufficient performance of an electrophotographic photoreceptor.SOLUTION: An electrophotographic photoreceptor includes a substrate, a charge generating layer containing a charge generating material, and a charge transport layer containing a charge transport material in this order, and the charge transport layer is a surface layer. The charge transport layer contains a polycarbonate resin having a specific structural unit.SELECTED DRAWING: None PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor that is excellent in durability and has sufficient performance of an electrophotographic photoreceptor.SOLUTION: An electrophotographic photoreceptor includes a substrate, a charge generating layer containing ...more ...less
12
CN107678254A
Publication/Patent Number: CN107678254A
Publication date: 2018-02-09
Application number: 201710637340
Filing date: 2017-07-31
Abstract: The invention provides an electrophotographic photosensitive member, a process cartridge, and an electrophotographic apparatus. The electrophotographic photosensitive member includes a support, a charge generating layer containing a charge generation material, and a charge transporting layer containing a charge transport material in this order, the charge transporting layer serving as a surface layer. The charge transporting layer contains a polycarbonate resin having a particular structural unit. The invention provides an electrophotographic photosensitive member, a process cartridge, and an electrophotographic apparatus. The electrophotographic photosensitive member includes a support, a charge generating layer containing a charge generation material, and a charge ...more ...less
13
EP3062153B1
Publication/Patent Number: EP3062153B1
Publication date: 2018-09-26
Application number: 16156831.6
Filing date: 2016-02-23
Abstract: An electrophotographic photosensitive member (1) has a support, a charge generation layer, and a charge transport layer in this order, the charge transport layer containing a charge transport material. The charge transport layer is a surface layer of the electrophotographic photosensitive member and contains a polycarbonate resin having a structural unit selected from group A and a structural unit selected from group B (groups A and B defined in the disclosure). An electrophotographic photosensitive member (1) has a support, a charge generation layer, and a charge transport layer in this order, the charge transport layer containing a charge transport material. The charge transport layer is a surface layer of the electrophotographic ...more ...less
14
US9864284B2
Publication/Patent Number: US9864284B2
Publication date: 2018-01-09
Application number: 15/054,009
Filing date: 2016-02-25
Abstract: An electrophotographic photosensitive member has a support, a charge generation layer, and a charge transport layer in this order, the charge transport layer containing a charge transport material. The charge transport layer is a surface layer of the electrophotographic photosensitive member and contains a polycarbonate resin having a structural unit selected from group A and a structural unit selected from group B. An electrophotographic photosensitive member has a support, a charge generation layer, and a charge transport layer in this order, the charge transport layer containing a charge transport material. The charge transport layer is a surface layer of the electrophotographic ...more ...less
15
US9581920B2
Publication/Patent Number: US9581920B2
Publication date: 2017-02-28
Application number: 14/995,555
Filing date: 2016-01-14
Abstract: Provided is coating film-removing method for removing unnecessary coating film on outer peripheral surface of lower side of cylindrical substrate by dip coating, the method comprising: supplying solvent to inside of substrate; causing, through use of outer peripheral surface coating film-removing member configured to remove coating film at portion to be subjected to coating film removal in outer peripheral surface of the substrate, the outer peripheral surface coating film-removing member to abut against region ranging from upper end to lower end of coating film at the portion; and removing, under a state wherein the outer peripheral surface coating film-removing member abuts against the region, the coating film at the portion through rubbing by relatively rotating the substrate and the outer peripheral surface coating film-removing member while supplying the solvent, which is supplied to inside and then flows to lower end of the substrate, to abutting portion. Provided is coating film-removing method for removing unnecessary coating film on outer peripheral surface of lower side of cylindrical substrate by dip coating, the method comprising: supplying solvent to inside of substrate; causing, through use of outer peripheral surface ...more ...less
16
JP2017185458A
Publication/Patent Number: JP2017185458A
Publication date: 2017-10-12
Application number: 2016077014
Filing date: 2016-04-07
Assignee: CANON INC
Abstract: PROBLEM TO BE SOLVED: To provide a coating film removing method that is capable of efficiently removing an unnecessary coating film from the lower outer peripheral surface of a cylindrical substrate.SOLUTION: The coating film removing method for removing a coating film from the lower outer peripheral surface of a cylindrical substrate has: the outer periphery coating film removing member abutting step of abutting so as to form a space by a groove shape and a substrate by using an outer periphery coating film removing member for removing a coating film from the removed part of the outer peripheral surface of the substrate as a coating film removing member PROBLEM TO BE SOLVED: To provide a coating film removing method that is capable of efficiently removing an unnecessary coating film from the lower outer peripheral surface of a cylindrical substrate.SOLUTION: The coating film removing method for removing a coating film from the ...more ...less
17
US9753385B2
Publication/Patent Number: US9753385B2
Publication date: 2017-09-05
Application number: 15/054,017
Filing date: 2016-02-25
Abstract: An electrophotographic photosensitive member has a support, a charge generation layer, and a charge transport layer in this order, the charge transport layer containing a charge transport material. The charge transport layer is a surface layer of the electrophotographic photosensitive member and contains a polycarbonate resin having a structural unit selected from group A and a structural unit selected from group B (groups A and B defined in the disclosure). An electrophotographic photosensitive member has a support, a charge generation layer, and a charge transport layer in this order, the charge transport layer containing a charge transport material. The charge transport layer is a surface layer of the electrophotographic ...more ...less
18
CN105824203A
Publication/Patent Number: CN105824203A
Publication date: 2016-08-03
Application number: 201610053451
Filing date: 2016-01-27
Assignee: CANON KK
Abstract: The invention relates to a coating film-removing method for a cylindrical substrate and a manufacturing method for an electrophotographic photosensitive member. Provided is the coating film-removing method for removing unnecessary coating film on an outer peripheral surface of the lower side of the cylindrical substrate by dip coating The invention relates to a coating film-removing method for a cylindrical substrate and a manufacturing method for an electrophotographic photosensitive member. Provided is the coating film-removing method for removing unnecessary coating film on an outer peripheral surface of ...more ...less
19
JP2016145974A
Publication/Patent Number: JP2016145974A
Publication date: 2016-08-12
Application number: 2016012583
Filing date: 2016-01-26
Assignee: CANON INC
Abstract: PROBLEM TO BE SOLVED: To provide a coating film removing method capable of easily and accurately removing an unnecessary coating film from a cylindrical substrate lower outer peripheral surface by an immersion coating method.SOLUTION: A coating film removing method for removing an unnecessary coating film from a cylindrical substrate lower outer peripheral surface by an immersion coating method includes the solvent supply step of supplying a solvent into a substrate through an opening for discharging the solvent PROBLEM TO BE SOLVED: To provide a coating film removing method capable of easily and accurately removing an unnecessary coating film from a cylindrical substrate lower outer peripheral surface by an immersion coating method.SOLUTION: A coating film removing method for removing ...more ...less
20
US2016216619A1
Publication/Patent Number: US2016216619A1
Publication date: 2016-07-28
Application number: 14/995,555
Filing date: 2016-01-14
Abstract: Provided is coating film-removing method for removing unnecessary coating film on outer peripheral surface of lower side of cylindrical substrate by dip coating, the method comprising: supplying solvent to inside of substrate; causing, through use of outer peripheral surface coating film-removing member configured to remove coating film at portion to be subjected to coating film removal in outer peripheral surface of the substrate, the outer peripheral surface coating film-removing member to abut against region ranging from upper end to lower end of coating film at the portion; and removing, under a state wherein the outer peripheral surface coating film-removing member abuts against the region, the coating film at the portion through rubbing by relatively rotating the substrate and the outer peripheral surface coating film-removing member while supplying the solvent, which is supplied to inside and then flows to lower end of the substrate, to abutting portion. Provided is coating film-removing method for removing unnecessary coating film on outer peripheral surface of lower side of cylindrical substrate by dip coating, the method comprising: supplying solvent to inside of substrate; causing, through use of outer peripheral surface ...more ...less