摘要:
An electrophotographic image-forming method has a contact charging step of charging the surface of an electrophotographic photosensitive member; an electrostatic latent image forming step of forming an electrostatic latent image on the surface of the electrophotographic photosensitive member charged; a developing step of developing the electrostatic latent image formed into a toner image; and a transfer step of transferring the toner image formed by the development from the electrophotographic photosensitive member to a transfer material, the developing step serving also as a cleaning step for collecting a toner remaining on the electrophotographic photosensitive member after transfer. The toner contains an external additive and the electrophotographic photosensitive member has surface properties of universal hardness of 200 N/mm2 or above (provided that a curve that represents the relationship between hardness and depth of indentation by an indenter has no point of inflection) and a coefficient of surface friction of from 0.01 to 1.2.
摘要翻译:电子照相图像形成方法具有对电子照相感光构件的表面进行充电的接触充电步骤; 静电潜像形成步骤,在被充电的电照相感光构件的表面上形成静电潜像; 将形成为调色剂图像的静电潜像显影的显影步骤; 以及将通过显影形成的调色剂图像从电子照相感光构件转印到转印材料的转印步骤,显影步骤还用作在转印后收集在电子照相感光构件上残留的调色剂的清洁步骤。 调色剂含有外部添加剂,并且电子照相感光构件具有200N / mm 2以上的通用硬度的表面特性(条件是表示硬度与压头的压痕深度之间的关系没有拐点的曲线)和 表面摩擦系数为0.01〜1.2。
摘要:
An electrophotographic apparatus is disclosed which has an electrophotographic photosensitive member and a transfer member. The photosensitive member has a conductive support and a photosensitive layer, and further has a surface layer formed of a binder resin, fluorine atom- or silicon atom-containing compound particles incompatible with the binder resin, and a fluorine atom- or silicon atom-containing compound compatible with the binder resin. In the surface layer, the proportion of fluorine atoms and silicon atoms to carbon atoms, (F+Si)/C, as measured by X-ray photoelectron spectroscopy is 0.01 to 1.0. Additionally, the transfer member is a multiple-transfer member.
摘要:
An electrophotographic apparatus is disclosed which has an electrophotographic photosensitive member and a transfer device. The photosensitive member has a conductive support and a photosensitive layer, and further has a surface layer formed of a binder resin, fluorine atom- or silicon atom-containing compound particles incompatible with the binder resin, and a fluorine atom- or silicon atom-containing compound compatible with the binder resin. In the surface layer, the proportion of fluorine atoms and silicon atoms to carbon atoms, (F+Si)/C, as measured by X-ray photoelectron spectroscopy is 0.01 to 1.0. Additionally, the transfer device is a multiple-transfer device.
摘要:
An electrophotographic photosensitive member that can not easily cause charging lines even where it is an electrophotographic photosensitive member employing as a conductive layer a layer containing metal oxide particles is disclosed. Also disclosed are a process cartridge and an electrophotographic apparatus which have such an electrophotographic photosensitive member. The electrophotographic photosensitive member has a conductive layer which contains titanium oxide particles coated with tin oxide doped with phosphorus or tungsten.
摘要:
To provide a process for producing an electrophotographic photosensitive member that can not easily cause any fog due to an increase in dark attenuation, a conductive layer is formed with use of a coating liquid for conductive layer prepared with use of a solvent, a binder material and metal oxide particles. The metal oxide particles (P) and binder material (B) in the coating liquid for conductive layer are in a mass ratio (P/B) of from 1.5/1.0 to 3.5/1.0. The metal oxide particle is a titanium oxide particle coated with tin oxide doped with phosphorus or tungsten. Where powder resistivity of the metal oxide particle is represented by x (Ω·cm) and powder resistivity of the titanium oxide particle as a core particle constituting the metal oxide particle is represented by y (Ω·cm), the y and the x satisfy the following relations (i) and (ii): 5.0×107≦y≦5.0×109 (i) 1.0×102≦y/x≦1.0×106 (ii).
摘要:
An electrophotographic photosensitive member having a specific conductive layer and promising less variation in light-area potential and residual potential in reproducing images repeatedly, and a process cartridge and an electrophotographic apparatus which have such an electrophotographic photosensitive member are provided. Where a test in which a voltage of −1.0 kV having only a DC voltage component is continuously applied to the conductive layer for 1 hour is conducted, the conductive layer has volume resistivity satisfying the following mathematical expressions (1) and (2), as values before and after the test: −2.00≦(log|ρ2|−log|ρ1|)≦2.00 (1), and 1.0×108≦ρ1≦2.0×1013 (2), where, in the expressions (1) and (2), ρ1 is volume resistivity (Ω·cm) of the conductive layer as measured before the test and ρ2 is volume resistivity (Ω·cm) of the conductive layer as measured after the test.
摘要:
Provided are an electrophotographic photosensitive member in which leakage doesn't easily occur, a process cartridge and an electrophotographic apparatus each including the electrophotographic photosensitive member, and a method of manufacturing the electrophotographic photosensitive member. The electrophotographic photosensitive member includes a conductive layer including titanium oxide particle coated with tin oxide doped with a hetero element. When an absolute value of a maximum current amount flowing through the conductive layer in a case of performing a test of applying −1.0 kV including DC voltage to the conductive layer is defined as Ia, and an absolute value of a current amount flowing through the conductive layer in a case where a decrease ratio of a current amount per minute reaches 1% or less for the first time is defined as Ib, the relations of Ia≦6000 and 10≦Ib are satisfied. A volume resistivity of the conductive layer before the test is 1.0×108 Ω·cm to 5.0×1012 Ω·cm.
摘要:
An electrophotographic photosensitive member is provided in which black spots on an output image are hardly caused by local charge injection from a support to a photosensitive layer. For this purpose, a conductive layer is formed using a coating liquid for a conductive layer prepared using a solvent, a binder material and a metal oxide particle that satisfies the following relation (i): 45≦A×ρ×D≦65 (i) wherein A denotes the surface area of the metal oxide particle per unit mass [m2/g], D denotes the number average particle diameter of the metal oxide particle [μm], and ρ denotes the density of the metal oxide particle [g/cm3]. The metal oxide particle is a titanium oxide particle coated with tin oxide doped with phosphorus.
摘要:
An electrophotographic photosensitive member having a specific conductive layer and promising less variation in light-area potential and residual potential in reproducing images repeatedly, and a process cartridge and an electrophotographic apparatus which have such an electrophotographic photosensitive member are provided. Where a test in which a voltage of −1.0 kV having only a DC voltage component is continuously applied to the conductive layer for 1 hour is conducted, the conductive layer has volume resistivity satisfying the following mathematical expressions (1) and (2), as values before and after the test: −2.00≦(log|ρ2|−log|ρ1|)≦2.00 (1), and 1.0×108≦ρ1≦2.0×1013 (2), where, in the expressions (1) and (2), ρ1 is volume resistivity (Ω·cm) of the conductive layer as measured before the test and ρ2 is volume resistivity (Ω·cm) of the conductive layer as measured after the test.
摘要:
An AF apparatus for a microscope (1) of the present invention includes: an observational optical system (6) which radiates light on an object under inspection (3) via one of multiple interchangeable objective lens (2) and which has a CCD (imaging device) (5) for observing reflected light from the object under inspection (3); a light flooding portion (7) which radiates a laser (non-visible light) on the object under inspection (3) via the objective lens (2) of the observational optical system (6); a focal point detection optical system (10) which has a photo-detector (photo-electric conversion portion) (8) that is arranged at an image surface of a light figure of the reflected laser from the object under inspection and that outputs signals corresponding to the position of the light figure inside the image surface, and which detects the relative distance between the objective lens (2) and the object under inspection (3); an object position adjusting unit (11) which adjusts the focal position of the object under inspection (3) based on the output signals from the focal point detection optical system (10); and a diaphragm unit (12) which adjust the area on which the laser is radiated so as to be inside the imaging area of the CCD (5).