-
公开(公告)号：US20200159136A1
公开(公告)日：2020-05-21
申请号：US16673485
申请日：2019-11-04
发明人： Haruki Mori , Masaki Nonaka , Eileen Takeuchi
摘要： Provided is an electrophotographic photosensitive member that can achieve both of satisfactory wear resistance and the suppression of an image streak at the time of its repeated use. The electrophotographic photosensitive member includes a support and a photosensitive layer. The surface layer of the electrophotographic photosensitive member contains: a polymer of a hole-transportable compound having a chain-polymerizable functional group; and an ester compound having specific alkyl groups.
-
2.发明申请公开(公告)号：US20190094735A1
公开(公告)日：2019-03-28
申请号：US16135181
申请日：2018-09-19
IPC分类号： G03G13/054 , G03G5/04 , G03G13/09 , G03G9/097
摘要： There is provided an electrophotographic photosensitive member, a process cartridge and an electrophotographic apparatus in which residual potential is suppressed and a ghost image is prevented from being generated in a low-humidity environment in an undercoat layer of the electrophotographic photosensitive member. An electrophotographic photosensitive member including: an undercoat layer containing a strontium titanate particle having a maximum peak at a position of 2θ=32.20±0.20 (θ represents a Bragg angle) in a CuKα characteristic X-ray diffraction pattern and a half-value width of the maximum peak of 0.10 deg or more and 0.50 deg or less, and a titanium oxide particle; and a photosensitive layer containing a polyvinyl butyral resin, and a process cartridge and an electrophotographic apparatus each provided with the electrophotographic photosensitive member.
-
3.发明授权公开(公告)号：US11169453B2
公开(公告)日：2021-11-09
申请号：US16894988
申请日：2020-06-08
发明人： Eileen Takeuchi , Koichi Nakata , Shubun Kujirai , Haruki Mori
摘要： The present disclosure provides an electrophotographic photosensitive member having a surface layer in which an occurrence of the image deletion is suppressed; a process cartridge equipped with the electrophotographic photosensitive member; and an electrophotographic apparatus provided with the process cartridge. An electrophotographic photosensitive member has a surface layer that includes a copolymerized product of a composition including a metal oxide particle having a polymerizable functional group on a surface thereof and a polymerizable compound having a particular structure.
-
4.发明授权公开(公告)号：US10705440B2
公开(公告)日：2020-07-07
申请号：US16426069
申请日：2019-05-30
发明人： Takanori Ueno , Kumiko Takizawa , Ikuyo Kuroiwa , Tsuyoshi Shimada , Wataru Kitamura , Eileen Takeuchi
摘要： Provided is an electrophotographic photosensitive member that can suppress the generation of both an interference fringe and a streaky uneven part in a circumferential direction on an image. The generation of the interference fringe and the generation of the streaky uneven part in the circumferential direction on the image are suppressed by defining a length of a line-shaped groove of a support in a circumferential direction, and defining roughness parameters of a support in an axial direction.
-
5.发明授权公开(公告)号：US10969703B2
公开(公告)日：2021-04-06
申请号：US16731150
申请日：2019-12-31
发明人： Eileen Takeuchi , Koichi Nakata , Shubun Kujirai , Haruki Mori
摘要： Provided is an electrophotographic photosensitive member including a surface layer containing: a copolymerization product of a composition containing a hole-transportable compound having a chain-polymerizable functional group and a compound having a specific structure; and metal oxide particles.
-
6.发明申请公开(公告)号：US20200225595A1
公开(公告)日：2020-07-16
申请号：US16832508
申请日：2020-03-27
摘要： Provided is an electrophotographic photosensitive member in which the generation of a positive ghost image is suppressed under a low-temperature and low-humidity environment, and the occurrence of cracking is suppressed under a high-temperature and high-humidity environment. Also provided are a process cartridge mounted with the electrophotographic photosensitive member, and an electrophotographic apparatus including the process cartridge. The electrophotographic photosensitive member of the present disclosure is characterized in that an undercoat layer contains aluminum oxide particles and titanium oxide particles at a specific mass ratio.
-
7.发明授权公开(公告)号：US10353340B2
公开(公告)日：2019-07-16
申请号：US15946208
申请日：2018-04-05
摘要： There is provided an electrophotographic photosensitive member in which the variation in potential during repeated use is reduced. The electrophotographic photosensitive member is the electrophotographic photosensitive member of which an undercoat layer comprises a urethane resin and titanium oxide particles whose primary particle and secondary particle diameters are defined.
-
8.发明申请公开(公告)号：US20180314173A1
公开(公告)日：2018-11-01
申请号：US15960916
申请日：2018-04-24
发明人： Tsuyoshi Shimada , Kumiko Takizawa , Eileen Takeuchi , Ikuyo Kuroiwa , Wataru Kitamura , Kan Tanabe , Haruhiko Mitsuda
CPC分类号： G03G7/0086 , B82Y30/00 , G03F7/092 , G03G5/144 , G03G15/0216 , G03G15/75
摘要： There is provided an electrophotographic photosensitive member, a process cartridge and an electrophotographic apparatus that are excellent in charging properties and can suppress residual potential in the case where a strontium titanate particle is used as a metal oxide particle in an undercoat layer of the electrophotographic photosensitive member. An electrophotographic photosensitive member in which an undercoat layer contains a strontium titanate particle having a maximum peak at a position of 2θ=32.20±0.20 (θ represents a Bragg angle) in a CuKα characteristic X-ray diffraction pattern, the maximum peak having a half-value width of 0.10 deg or more and 0.50 deg or less, and a process cartridge and an electrophotographic apparatus each provided with the electrophotographic photosensitive member.
-
公开(公告)号：US20230259045A1
公开(公告)日：2023-08-17
申请号：US18156611
申请日：2023-01-19
发明人： Ryoichi Tokimitsu , Haruhiko Mitsuda , Jun Ohira , Toshiyasu Shirasuna , Ikuyo Kuroiwa , Tsuyoshi Shimada , Takanori Ueno , Kenichi Ikari , Eileen Takeuchi
CPC分类号： G03G5/071 , G03G5/14791 , G03G5/14726 , G03G5/0564
摘要： Provided is an electrophotographic photosensitive member including a surface layer, which is excellent in dispersibility of fluorine atom-containing resin particles and is suppressed from causing a ghost image. Specifically, provided is an electrophotographic photosensitive member including a surface layer, wherein the surface layer contains a fluorine atom-containing resin particle, a binder material, and a polymer A having specific structural units.
-
10.发明授权公开(公告)号：US11112706B2
公开(公告)日：2021-09-07
申请号：US16832508
申请日：2020-03-27
摘要： Provided is an electrophotographic photosensitive member in which the generation of a positive ghost image is suppressed under a low-temperature and low-humidity environment, and the occurrence of cracking is suppressed under a high-temperature and high-humidity environment. Also provided are a process cartridge mounted with the electrophotographic photosensitive member, and an electrophotographic apparatus including the process cartridge. The electrophotographic photosensitive member of the present disclosure is characterized in that an undercoat layer contains aluminum oxide particles and titanium oxide particles at a specific mass ratio.
-
-
-
-
-
-
-
-
-
搜索结果
17 条记录 (耗时 0.015 秒)
