Abstract:
membro eletrocondutivo, cartucho de processamento e aparelho eletrofotográfico. o membro eletrocondutivo tem um suporte eletrocondutivo e uma camada de superfície formada sobre o suporte eletrocondutivo, em que a camada de superfície tem um corpo poroso tendo um poro aberto contínuo, e o membro eletrocondutivo satisfaz os seguintes (1) e (2): (1)em uma condição específica, um potencial de superfície. do membro eletrocondutivo, após o decorrer de 1 o segundos desde uma completação de uma descarga, é de 10 v ou mais; e (2)quando aplicando-se uma tensão direta entre um filme de tereftalato de polietileno, como um membro a ser carregado e o membro eletrocondutivo, e carregando-se o filme de tereftalato de polietileno, ivdl ~ ivinl - ivthl é satisfeito dentro de uma faixa de ivinl > ivthl, em que, vd representa um potencial de carga do filme de tereftalato de polietileno, vin representa uma tensão aplicada entre o membro eletrocondutivo e o filme de tereftalato de polietileno, vth representa uma tensão de partida de descarga.
Abstract:
Provided is an electro-conductive member for electrophotography that stably shows high electroconductivity even under a low-temperature, low-humidity environment. The electro-conductive member for electrophotography has an electro-conductive mandrel and an electro-conductive layer. The electro-conductive layer contains an ionic electro-conductive resin and an ion carrier. The ionic electro-conductive resin has at least one structure selected from the group consisting of structures represented by the following formulae (1), (2), (3), and (4), and a structure represented by the following formula (5) (in the formula (1) to the formula (5), R 1 , R 2 , R 3 , and R 4 each represent a divalent organic group, X 1 , X 2 , X 3 , and X 4 each independently represent a sulfonic group or a quaternary ammonium base, and 1 represents an integer of 1 or more and 23 or less).
Abstract:
The present invention relates to a conductive member which includes a conductive support layer and a surface layer having a network structure made of a fiber formed on the outer peripheral surface of the conductive support layer, and satisfies a specific condition. The arithmetic mean value of the top 10% in the fiber diameter is 0.2 µm or more and 15.0 µm or less. A rigid body structure having a height that is 1.0 × 10 -2 to 1.0 × 10 1 times larger than the thickness of the surface layer is provided on the outer periphery of the conductive support layer.
Abstract:
The present invention addresses the problem of reducing the electrical resistance value of an electroconductive roller in an L/L environment while at the same time suppressing excessive reduction of resistance thereof in an H/H environment. An electroconductive member for electrophotography, having an electroconductive core body, and an electroconductive layer provided on the external periphery of the core body, the electroconductive member for electrophotography characterized in that the electroconductive layer includes a binder resin having an alkylene oxide structure and a sulfo group or quaternary ammonium group as an ion-exchange group in the molecule thereof, and an ion of opposite polarity to the ion-exchange group, the water content of the electroconductive layer in an environment of temperature 30°C and relative humidity 80% is 10 mass% or less, and the spin-spin relaxation time T2 of the electroconductive layer as found by pulse NMR measurement in an environment of temperature 15°C and relative humidity 10% and using hydrogen nuclei as the measured nuclei is at least 200 µsec.
Abstract:
The present invention provides an electrophotographic electrically conductive member in which conductivity needed for a charging member is secured, and defects in an image attributed to uneven discharging can be minimized independently of a long-term use and an environment of use. An electrophotographic electrically conductive member comprising an electrically conductive support and an electrically conductive layer, wherein the electrically conductive layer includes an ion conductive resin having a quaternary ammonium ion in a molecule structure as a binder resin, and a carrier molecule represented by the following formula (1) or (2): (wherein n 1 and n 2 each independently represent an integer of 1 to 4).
Abstract:
Provided is an electroconductive member configured to suppress a void image caused by abnormal discharge and a horizontal streak-like image caused by downstream discharge without depending on the thickness of a photosensitive layer of a photosensitive drum over a long period of time. The electroconductive member for electrophotography comprises at least an electroconductive support and a surface layer formed on an outer side of the electroconductive support. The surface layer includes a porous body and satisfies the predetermined (1), (2), and (3).
Abstract:
The objective is to reduce damage to an image caused by abnormal discharge, regardless of the usage conditions or the environment in which an electro-conductive member is used. This electro-conductive member, which is used by being brought into contact with a body to be contacted, is characterized in that: the electro-conductive member has a net-like structural body layer formed on the outer circumferential surface of an electro-conductive support body; the surface of the electro-conductive member is such that when the surface of the net-like structural body is observed, at least a portion of the net-like structural body exists in any 200 µm-square region; the net-like structural body comprises nonconductive fibers; and the mean fiber diameter of the top 10% of the fibers in terms of the fiber diameter at any measurement point in the nonconductive fibers is 0.2 - 15 µm.