摘要:
In a developer carrying member used in a developing apparatus by means of which an electrostatic latent image formed on an electrostatic latent image bearing member is developed with a developer to render it visible, the developer carrying member has at least a substrate and a resin coat layer formed on the substrate surface, and the resin coat layer contains at least a binder resin and graphitized particles. The surface of the resin coat layer has an average value A and a standard deviation σ of 100≦A≦800 (N/mm2) and σ
摘要翻译:在用于显影装置的显影剂承载构件中,通过该显影装置将形成在静电潜像承载构件上的静电潜像用显影剂显影使其可见,显影剂承载构件至少具有基底和树脂涂层 形成在基材表面上,树脂涂层至少含有粘结剂树脂和石墨化颗粒。 树脂涂层的表面具有平均值A和标准偏差σ为100≤A<= 800(N / MM 2 SUP>)和σ<30(N / MM <2> SUP>)。
摘要:
A developer carrying member for carrying a developer is includes a substrate and a resin coat layer which is formed on the surface of the substrate and contains a binder resin and a conductive fine powder. The binder resin is composed of a copolymer having a monomeric unit of a methyl methacrylate monomer (M) and a monomeric unit of a nitrogen-containing vinyl monomer (N). A copolymerization molar ratio of the methyl methacrylate monomer (M) to the nitrogen-containing vinyl monomer (N) in the copolymer fulfills the following condition: M:N=4:1 to 999:1. The binder resin has a weight-average molecular weight (Mw) of from 3,000 to 50,000.
摘要:
The present invention relates to a developer carrying member for carrying a developer having at least a substrate and a resin-coated layer formed on the surface of the substrate. The developer carrying member is the one which carries a one-component developer to visualize the electrostatic latent image carried by the electrostatic latent image carrying member, the resin-coated layer contains at least a binder resin, graphitized particles and roughing particles, the graphitized particles has 0.20 to 0.95 of graphitization degree (p(002)), and wherein in the surface configuration of the resin-coated layer as measured by use of focusing optical laser, the volume (B) of a microtopographical region defined by a certain area (A) of the microtopographical region without convexity formed by the roughing particles meets the following relationship 4.5≦B/A≦6.5, and the resin-coated layer has 0.9 to 2.5 μm of arithmetic mean roughness (Ra).
摘要翻译:本发明涉及用于承载至少具有基材的显影剂和形成在基材表面上的树脂涂层的显影剂承载构件。 显影剂承载构件是携带单组分显影剂以使由静电潜像承载构件承载的静电潜像可视化的显影剂承载构件,树脂涂层至少含有粘合剂树脂,石墨化颗粒和粗粒,石墨化颗粒 具有0.20〜0.95的石墨化度(p(002)),其中,在通过使用聚焦光学激光测定的树脂被覆层的表面构造中,由特定区域限定的微图形区域的体积(B) A)的粗糙粒子形成的无凸形的微观形貌区域满足以下关系4.5 <= B / A <= 6.5,树脂涂层的算术平均粗糙度(Ra)为0.9〜2.5μm。
摘要:
A developing assembly is disclosed having at least a developer container, a developer-carrying member and a developer layer thickness regulation member, wherein the developer is composed mainly of toner particles containing at least a binder resin and a colorant, and conductive fine particles, and the developer-carrying member has a substrate and a surface layer formed on the substrate of a non-magnetic metal, an alloy or a metallic compound. This developing assembly causes no sleeve ghost, enables electrostatic latent images to be faithfully developed, causes no fading phenomenon, and enables high-density images to be formed in every environment. Also disclosed are a process cartridge having the developing assembly and the latent-image-bearing member integrally set as one unit detachably mountable on the main body of an image-forming apparatus, and an image-forming method making use of the features of this developing assembly.
摘要:
A developing apparatus is disclosed which has a developer container, a developer carrying member for carrying a positively chargeable developer held in the developer container and transporting the developer to a developing zone, and a developer layer-thickness regulating member for regulating the thickness of a developer layer formed on the developer carrying member. The developer carrying member has a resin coat layer formed of a resin composition containing at least a resin selected from the group consisting of a phenol resin and a polyamide resin, a conductive material and a quaternary ammonium salt compound which is positively chargeable to iron powder. The resin composition may contain a urethane resin in place of the phenol resin and polyamide resin.
摘要:
In a developer carrying member used in a developing apparatus by means of which an electrostatic latent image formed on an electrostatic latent image bearing member is developed with a developer to render it visible, the developer carrying member has at least a substrate and a resin coat layer formed on the substrate surface, and the resin coat layer contains at least a binder resin and graphitized particles. The surface of the resin coat layer has an average value A and a standard deviation σ of 100≦A≦800 (N/mm2) and σ
摘要:
In a developing assembly including a two-component developer container and a developer-carrying member, the developer-carrying member has at least a substrate and a resin coat layer formed on the substrate surface, and the resin-coat layer contains at least a binder resin and solid particles for making the resin-coat-layer surface uneven. The solid particles have an average circularity of 0.64 or more, which is the average value of the values calculated according to the equation Circularity=(4×A)/{(ML)2×Π}, (wherein ML represents the Pythagorean-method maximum length of a particle projected image, and A represents the projected area of a particle image), and the resin-coat layer has a surface roughness fulfilling specific conditions attributable to the solid particles. Also disclosed are an image-forming apparatus and a process cartridge which employ the developing assembly.
摘要:
The present invention relates to a developer carrying member for carrying a developer having at least a substrate and a resin-coated layer formed on the surface of the substrate. The developer carrying member is the one which carries a one-component developer to visualize the electrostatic latent image carried by the electrostatic latent image carrying member, the resin-coated layer contains at least a binder resin, graphitized particles and roughing particles, the graphitized particles has 0.20 to 0.95 of graphitization degree (p (002)), and wherein in the surface configuration of the resin-coated layer as measured by use of focusing optical laser, the volume (B) of a microtopographical region defined by a certain area (A) of the microtopographical region without convexity formed by the roughing particles meets the following relationship 4.5≦B/A≦6.5, and the resin-coated layer has 0.9 to 2.5 μm of arithmetic mean roughness (Ra).
摘要翻译:本发明涉及用于承载至少具有基材的显影剂和形成在基材表面上的树脂涂层的显影剂承载构件。 显影剂承载构件是携带单组分显影剂以使由静电潜像承载构件承载的静电潜像可视化的显影剂承载构件,树脂涂层至少含有粘合剂树脂,石墨化颗粒和粗粒,石墨化颗粒 具有0.20〜0.95的石墨化度(p(002)),其中,在通过使用聚焦光学激光测定的树脂被覆层的表面构造中,由特定区域限定的微图形区域的体积(B) A)的粗糙粒子形成的无凸形的微观形貌区域满足以下关系4.5 <= B / A <= 6.5,树脂涂层的算术平均粗糙度(Ra)为0.9〜2.5μm。
摘要:
The present invention relates to a developer carrying member for carrying a developer having at least a substrate and a resin-coated layer formed on the surface of the substrate. The developer carrying member is the one which carries a one-component developer to visualize the electrostatic latent image carried by the electrostatic latent image carrying member, the resin-coated layer contains at least a binder resin, graphitized particles and roughing particles, the graphitized particles has 0.20 to 0.95 of graphitization degree (p (002)), and wherein in the surface configuration of the resin-coated layer as measured by use of focusing optical laser, the volume (B) of a microtopographical region defined by a certain area (A) of the microtopographical region without convexity formed by the roughing particles meets the following relationship 4.5≦B/A≦6.5, and the resin-coated layer has 0.9 to 2.5 μm of arithmetic mean roughness (Ra).
摘要翻译:本发明涉及用于承载至少具有基材的显影剂和形成在基材表面上的树脂涂层的显影剂承载构件。 显影剂承载构件是携带单组分显影剂以使由静电潜像承载构件承载的静电潜像可视化的显影剂承载构件,树脂涂层至少含有粘合剂树脂,石墨化颗粒和粗粒,石墨化颗粒 具有0.20〜0.95的石墨化度(p(002)),其中,在通过使用聚焦光学激光测定的树脂被覆层的表面构造中,由特定区域限定的微图形区域的体积(B) A)的粗糙粒子形成的无凸形的微观形貌区域满足以下关系4.5 <= B / A <= 6.5,树脂涂层的算术平均粗糙度(Ra)为0.9〜2.5μm。
摘要:
The present invention relates to a developer carrying member for carrying a developer having at least a substrate and a resin-coated layer formed on the surface of the substrate. The developer carrying member is the one which carries a one-component developer to visualize the electrostatic latent image carried by the electrostatic latent image carrying member, the resin-coated layer contains at least a binder resin, graphitized particles and roughing particles, the graphitized particles has 0.20 to 0.95 of graphitization degree (p (002)), and wherein in the surface configuration of the resin-coated layer as measured by use of focusing optical laser, the volume (B) of a microtopographical region defined by a certain area (A) of the microtopographical region without convexity formed by the roughing particles meets the following relationship 4.5≦B/A≦6.5, and the resin-coated layer has 0.9 to 2.5 μm of arithmetic mean roughness (Ra).
摘要翻译:本发明涉及用于承载至少具有基材的显影剂和形成在基材表面上的树脂涂层的显影剂承载构件。 显影剂承载构件是携带单组分显影剂以使由静电潜像承载构件承载的静电潜像可视化的显影剂承载构件,树脂涂层至少含有粘合剂树脂,石墨化颗粒和粗粒,石墨化颗粒 具有0.20〜0.95的石墨化度(p(002)),其中,在通过使用聚焦光学激光测定的树脂被覆层的表面构造中,由特定区域限定的微图形区域的体积(B) A)的粗糙粒子形成的无凸形的微观形貌区域满足以下关系4.5 <= B / A <= 6.5,树脂涂层的算术平均粗糙度(Ra)为0.9〜2.5μm。