公开(公告)号：JP2008096664A

公开(公告)日：2008-04-24

申请号：JP2006277805

申请日：2006-10-11

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： HASHIMOTO MASAKI ,  TORIYAMA KOICHI

IPC: G03G5/14

Abstract: PROBLEM TO BE SOLVED: To provide a photoreceptor having satisfactory electrostatic charging properties, reduced residual potential, excellent repeated stability and environmental properties, and free from image defects such as moire and fogging.
SOLUTION: The photoreceptor includes an undercoat layer and a photosensitive layer which are sequentially formed on an electrically conductive support. The undercoat layer contains two or more kinds of acicular titanium oxides with different dimensions and a binder resin, and the blending ratio (weight) of them is 10/90 to 99/1. The average value of the aspect ratios of the acicular titanium oxides is 1.5 to 300, and the volume resistance value in a green compact under the press pressure of 100 kg/cm
2 in the acicular titanium oxides is 10
5 to 10
10 Ω cm. The acicular titanium oxides each contains large acicular titanium oxides in which the length of a minor axis is 0.03 to 0.25 μm and the length of a major axis is 0.1 to 5 μm, and small acicular titanium oxides in which the length of a minor axis is 0.01 to 0.06 μm and the length of a major axis is 0.03 to 0.3 μm, and the blending ratio (weight) of them is 90/10 to 10/90.
COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：提供具有令人满意的静电充电性，降低的残留电位，优异的重复稳定性和环境性能，并且没有诸如莫尔条纹和雾化的图像缺陷的感光体。 感光体包括依次形成在导电性支持体上的底涂层和感光层。 底涂层含有两种以上不同尺寸的针状钛氧化物和粘合剂树脂，它们的配合比（重量）为10/90〜99/1。 针状钛氧化物的长径比的平均值为1.5〜300，针状钛氧化物的压制压力为100kg / cm 2的压坯的体积电阻值为10 5 至10 10 Ωcm。 针状钛氧化物各自含有大针状钛氧化物，其中短轴长度为0.03〜0.25μm，长轴长度为0.1〜5μm，小轴长度的小针状氧化钛为 0.01〜0.06μm，长轴长度为0.03〜0.3μm，共混比（重量）为90/10〜10/90。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2003076045A

公开(公告)日：2003-03-14

申请号：JP2001271528

申请日：2001-09-07

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： KADOI MIKIO ,  TANAKA YUJI ,  HASHIMOTO MASAKI ,  SUGIMURA HIROSHI

IPC: G03G5/06 ,  G03G5/05 ,  G03G5/14

Abstract: PROBLEM TO BE SOLVED: To develop an electrophotographic photoreceptor excellent in sensitivity characteristics and electrification characteristics and having practically sufficient performance in stability even for repeated use.
SOLUTION: The electrophotographic photoreceptor is a layered type one having a base coating layer, a charge generating layer and a charge transfer layer deposited on a conductive base body. The base coating layer contains acicular and/or dendritic titanium oxide particles. The charge generating layer is formed by using a butyral resin expressed by general formula [X] as a binder resin. The charge transfer layer contains one or more kinds of charge transfer materials selected from styryl compounds expressed by general formula [A], aromatic diamine compounds expressed by general formula [B] or aminostilbene compounds expressed by formula [C]. (Each general formula is omitted herein).
COPYRIGHT: (C)2003,JPO

Abstract translation: 要解决的问题：开发出灵敏度特性和起电特性优异的电子照相感光体，即使重复使用也具有足够的稳定性能。 解决方案：电子照相感光体是具有底涂层，电荷产生层和沉积在导电基体上的电荷转移层的分层型感光体。 基底涂层含有针状和/或树枝状氧化钛颗粒。 电荷产生层通过使用由通式[X]表示的丁缩醛树脂作为粘合剂树脂形成。 电荷转移层含有选自通式[A]表示的苯乙烯基化合物，由通式[B]表示的芳香族二胺化合物或式[C]表示的氨基茋化合物的一种以上的电荷转移材料。 （本文省略各通式）。

公开(公告)号：JP2003066647A

公开(公告)日：2003-03-05

申请号：JP2001257600

申请日：2001-08-28

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： SUGIMURA HIROSHI ,  KADOI MIKIO ,  TANAKA YUJI ,  HASHIMOTO MASAKI ,  ISHIDA TOSHINAO ,  MATSUMOTO MASANORI

IPC: G03G9/08 ,  G03G5/05 ,  G03G5/06

Abstract: PROBLEM TO BE SOLVED: To provide a method for forming an image with practically sufficient electric and mechanical performances and high durability. SOLUTION: In the method for forming an image by electrifying the surface of an electrophotographic photoreceptor to form an electrostatic latent image and then developing and transferring the electrostatic latent image to form an image, the photosensitive layer of the electrophotographic photoreceptor used contains a polymer compound having the structural unit expressed by general formula (1). The electrostatic charge image formed on the electrophotographic photoreceptor is developed and visualized by using a toner prepared by externally adding an irregular magnetic material particles to color particles composed of at least a binder resin and a coloring agent. In formula (1), each of R , R , R , R , R , R , R and R represents a hydrogen atom, halogen atom, 1-6C alkyl group which may have substituents, 4-10C cyclic hydrocarbon group which may have substituents or aryl group which may have substituents.

Abstract translation: 要解决的问题：提供一种以实际上足够的电气和机械性能以及高耐久性形成图像的方法。 解决方案：在通过使电子照相感光体的表面带电以形成静电潜像，然后显影和转印静电潜像以形成图像的图像形成方法中，所使用的电子照相感光体的感光层含有具有 由通式（1）表示的结构单元。 通过使用通过向由至少粘合剂树脂和着色剂构成的着色颗粒外部添加不规则磁性材料颗粒而制备的调色剂来显影形成在电子照相感光体上的静电电荷图像。 在式（1）中，R 1，R 2，R 3，R 4，R 5，R 6，R 7和R 8各自表示氢 原子，卤素原子，可具有取代基的1-6C烷基，可具有取代基的4-10C环状烃基或可具有取代基的芳基。

公开(公告)号：JP2003066638A

公开(公告)日：2003-03-05

申请号：JP2001257598

申请日：2001-08-28

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： TANAKA YUJI ,  KADOI MIKIO ,  HASHIMOTO MASAKI ,  SUGIMURA HIROSHI

IPC: G03G5/14 ,  G03G5/05 ,  G03G5/06

Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor having excellent sensitivity and electrification characteristics, high stability of these characteristics for repeated use and practically sufficient performances.
SOLUTION: In the electrophotographic photoreceptor, titanium oxide particles at least either in an acicular form or dendritic form are incorporated into the base coating layer on the conductive base body. A butyral resin expressed by general formula (1) is incorporated as a binder resin into the charge generating layer. A polymer compound having the structural unit expressed by general formula (2) is incorporated as a binder resin into the charge transfer layer. In formula (1), R
0 represents a hydrogen atom, a methyl group or an ethyl group and each of j, k, l and m represents an integer. In formula (2), each of R
1 , R
2 , R
3 , R
4 , R
5 , R
6 , R
7 and R
8 represents a hydrogen atom, halogen atom, 1-6C alkyl group which may have substituents, 4-10C cyclic hydrocarbon group which may have substituents or aryl group which may have substituents.
COPYRIGHT: (C)2003,JPO

Abstract translation: 要解决的问题：提供具有优异的灵敏度和电气特性的电子照相感光体，这些特性的重复使用的稳定性高，实际上具有足够的性能。 解决方案：在电子照相感光体中，导电性基体上的基底涂层中并入至少具有针状或树枝状的氧化钛粒子。 将由通式（1）表示的丁缩醛树脂作为粘合剂树脂引入电荷产生层。 将具有由通式（2）表示的结构单元的高分子化合物作为粘合剂树脂引入电荷转移层。 在式（1）中，R 0表示氢原子，甲基或乙基，j，k，l和m各自表示整数。 在式（2）中，R 1，R 2，R 3，R 4，R 5，R 6，R 7和R 8各自表示氢 原子，卤素原子，可具有取代基的1-6C烷基，可具有取代基的4-10C环状烃基或可具有取代基的芳基。

公开(公告)号：JP2013134374A

公开(公告)日：2013-07-08

申请号：JP2011284547

申请日：2011-12-26

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： HASHIMOTO MASAKI

IPC: G03G5/05 ,  G03G5/043 ,  G03G5/047 ,  G03G5/06 ,  G03G5/14 ,  G03G5/147

Abstract: PROBLEM TO BE SOLVED: To provide a photoreceptor free from image deletion and chipping in a cleaning blade and capable of suppressing generation of exposure unevenness for a long period of time, and to provide an image forming apparatus having the photoreceptor and responding to demands for reduction in size and in cost.SOLUTION: The electrophotographic photoreceptor includes a conductive substrate 11, a charge generating layer 12, a filler-containing charge transporting layer 13, and a surface-side charge transporting layer 14. The filler-containing charge transporting layer 13 contains a charge transporting material and filler particles 2 having an average primary particle diameter of 0.06 μm or more and 0.3 μm or less. The surface-side charge transporting layer 14 layered on the filler-containing charge transporting layer 13 contains the charge transporting material but no filler particles 2.

Abstract translation: 要解决的问题：提供一种在清洁刮板中不存在图像删除和切屑的感光体，并且能够长时间抑制曝光不均匀的产生，并且提供具有感光体的图像形成装置并且响应于还原的要求 尺寸和成本。解决方案：电子照相感光体包括导电基板11，电荷产生层12，含填料的电荷输送层13和表面侧电荷输送层14.含填料的电荷输送层13 含有电荷输送材料和平均一次粒径为0.06μm以上且0.3μm以下的填料粒子2。 层叠在含填料的电荷输送层13上的表面侧电荷输送层14含有电荷输送材料，但不含填料粒子2。

公开(公告)号：JP2012128335A

公开(公告)日：2012-07-05

申请号：JP2010281702

申请日：2010-12-17

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： HASHIMOTO MASAKI

IPC: G03G21/00 ,  G03G5/00 ,  G03G5/10 ,  G03G15/00

Abstract: PROBLEM TO BE SOLVED: To easily remove a vibration control member from a photosensitive drum by employing a simple structure.SOLUTION: An electrophotographic photoreceptor mainly comprises: a photosensitive drum 302 including a photosensitive layer 309 formed on a cylindrical conductive supporting base 301; a vibration control member 303 made of a resin and adhered to both ends of the photosensitive drum 302 with an electrically-releasing adhesive 311; and a flange 304 inserted into the end. The vibration control member 303 includes a disk-shaped portion 303a having an outer diameter set to be sufficiently small to be fit in the photosensitive drum 302. The vibration control member 303 is molded from a resin or the like. A conductive sheet 315 of a metal such as aluminum, copper or platinum is adhered onto an outer circumference of the disk-shaped portion 303a with an adhesive, so as to work as a conductive portion of the vibration control member 303.

Abstract translation: 要解决的问题：通过采用简单的结构从感光鼓容易地移除振动控制构件。 解决方案：电子照相感光体主要包括：感光鼓302，其包括形成在圆柱形导电支撑基底301上的感光层309; 由树脂制成的振动控制构件303，并且用电气释放粘合剂311粘附到感光鼓302的两端; 以及插入该端部的凸缘304。 振动控制构件303包括外径设定为足够小以配合在感光鼓302中的盘形部分303a。振动控制构件303由树脂等模制。 诸如铝，铜或铂的金属的导电片315用粘合剂粘附到盘形部分303a的外圆周上，以作为振动控制构件303的导电部分起作用。 （C）2012，JPO＆INPIT

公开(公告)号：JP2012103619A

公开(公告)日：2012-05-31

申请号：JP2010254078

申请日：2010-11-12

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： TORIYAMA KOICHI ,  HASHIMOTO MASAKI

IPC: G03G5/147 ,  G03G5/047 ,  G03G5/05 ,  G03G5/06 ,  G03G5/14 ,  G03G15/00

Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor having excellent mechanical/electric durability even in long-term repeated use and having high durability without inducing an abnormal image, and to provide an image forming apparatus having the photoreceptor.SOLUTION: The electrophotographic photoreceptor comprises: a conductive support; and a laminate A formed thereon including a photosensitive layer comprising at least a charge generating layer and a charge transporting layer, layered in this order from the conductive support side; or a laminate B formed on the support, including a photosensitive layer comprising a charge generating layer and a charge transporting layer layered in this order from the conductive support side, and a surface protective layer formed on the photosensitive layer. The charge transporting layer of the laminate A or the surface protective layer of the laminate B, functioning as an outermost surface layer, contains hollow silica as an improving agent for wear resistance.

Abstract translation: 要解决的问题：提供即使长时间重复使用也具有优异的机械/电气耐久性并且具有高耐久性而不引起异常图像的电子照相感光体，并提供具有感光体的图像形成装置。 电解质感光体包括：导电性支持体; 以及形成在其上的层压体A，其包括至少包含电荷产生层和电荷输送层的感光层，从导电性支撑侧依次层叠; 或形成在载体上的层压体B，包括从导电性支撑体侧依次层叠电荷产生层和电荷传输层的感光层，以及形成在感光层上的表面保护层。 作为层叠体A的电荷输送层或作为最外表面层的层叠体B的表面保护层，含有作为耐磨性的改性剂的中空二氧化硅。 版权所有（C）2012，JPO＆INPIT

公开(公告)号：JP2012032440A

公开(公告)日：2012-02-16

申请号：JP2010169362

申请日：2010-07-28

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： ISHIGURO YASUYUKI ,  HASHIMOTO MASAKI ,  NAGAHAMA HITOSHI

IPC: G03G15/08 ,  G03G21/16

Abstract: PROBLEM TO BE SOLVED: To easily carry out an operation for exchange of a ball bearing attached to a developing apparatus.SOLUTION: A developing apparatus 24 includes: a developer tank 2 for storing the developer; a rotatable sleeve 5a installed to be rotatable inside the developer tank; a second shaft 72 attached to the rotatable sleeve 5a; a conductive member 80 fitted into the developer tank 2; and a ball bearing 90 for supporting the second shaft 72 to be rotatable. The ball bearing 90 has a conductive region on its outer surface and is supported by the conductive member 80 by having the conductive region and the conductive member 80 adhered with an electric conduction releasable adhesive.

Abstract translation: 要解决的问题：为了容易地执行用于更换附接到显影装置的滚珠轴承的操作。 解决方案：显影装置24包括：用于存储显影剂的显影剂罐2; 安装成能够在显影剂罐内旋转的可旋转套筒5a; 附接到可旋转套筒5a的第二轴72; 安装在显影槽2中的导电构件80; 以及用于支撑第二轴72可旋转的滚珠轴承90。 滚珠轴承90在其外表面上具有导电区域，并且由导电区域和导电构件80用导电可释放粘合剂粘合而由导电构件80支撑。 版权所有（C）2012，JPO＆INPIT

公开(公告)号：JP2004341136A

公开(公告)日：2004-12-02

申请号：JP2003136419

申请日：2003-05-14

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： HASHIMOTO MASAKI ,  MORITA KAZUSHIGE ,  TORIYAMA KOICHI ,  SHINTO YURIKO ,  FUKUSHIMA KOUTARO

IPC: G03G5/047 ,  G03G21/10

Abstract: PROBLEM TO BE SOLVED: To provide an image forming apparatus which does not induce failure in the image quality caused by cleaning failure even for long term use by specifying the surface free energy of a photoreceptor and the hardness and blade load of a cleaning blade. SOLUTION: The photoreceptor 2 installed in an image forming apparatus 1 and forming an electrostatic latent image by exposure to light in accordance with image information is specified to have 28 to 35 mN/m surface free energy (γ). The cleaning blade 31a mounted in a cleaning device 31 to remove a foreign matter such as toner remaining on the surface of the photoreceptor 2 is specified to have 55 to 85 degrees of the spring-type hardness, and 5 to 40 gf/cm of blade load. The image forming apparatus thus specified shows excellent cleaning property and prevents filming, so that high quality images can be formed for a long term. COPYRIGHT: (C)2005,JPO&NCIPI

公开(公告)号：JP2003066629A

公开(公告)日：2003-03-05

申请号：JP2001257594

申请日：2001-08-28

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： SUGIMURA HIROSHI ,  KADOI MIKIO ,  TANAKA YUJI ,  HASHIMOTO MASAKI ,  TORIYAMA KOICHI ,  MATSUMOTO MASANORI

IPC: G03G5/05 ,  G03G5/06

Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor having practically sufficient electric, chemical and mechanical performances and high durability of these performances.
SOLUTION: In the electrophotographic photoreceptor, a polymer compound (A) having the structural unit expressed by general formula (1) and a polymer compound (B) having the structural unit expressed by general formula (2) are incorporated into the photosensitive layer on the conductive base body. In formula (1), each of R
1 , R
2 , R
3 , R
4 , R
5 , R
6 , R
7 and R
8 represents a hydrogen atom, halogen atom, 1-6C alkyl group which may have substituents, 4-10C cyclic hydrocarbon group which may have substituents or aryl group which may have substituents. In formula (2), each of R
9 , R
10 , R
11 , R
12 , R
13 , R
14 , R
15 and R
16 represents a hydrogen atom, halogen atom, 1-6C alkyl group which may have substituents, 4-10C cyclic hydrocarbon group which may have substituents or aryl group which may have substituents, and Z is a group of atoms necessary to form a carbon ring which may have substituents or heterocyclic ring which may have substituents.
COPYRIGHT: (C)2003,JPO

Abstract translation: 要解决的问题：提供具有足够的电，化学和机械性能以及这些性能的高耐久性的电子照相感光体。 解决方案：在电子照相感光体中，将具有由通式（1）表示的结构单元的高分子化合物（A）和具有由通式（2）表示的结构单元的高分子化合物（B））并入到感光层上 导电基体。 在式（1）中，R 1，R 2，R 3，R 4，R 5，R 6，R 7和R 8各自表示氢 原子，卤素原子，可具有取代基的1-6C烷基，可具有取代基的4-10C环状烃基或可具有取代基的芳基。 在式（2）中，R 9，R 10，R 11，R 12，R 13，R 14，R 15和R 16各自表示氢 原子，卤素原子，可具有取代基的1-6C烷基，可具有取代基的4-10C环状烃基或可具有取代基的芳基，Z是形成可具有取代基的碳环所必需的原子基团 或可具有取代基的杂环。