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Conductive rubber roller

A rubber roller, rubber technology, applied in the direction of electrography, electric recording process applying charge pattern, equipment for applying electric recording process of charge pattern, etc., can solve the problems of reducing hardness and resistance, etc.

Active Publication Date: 2011-09-21
SHENZHEN LEPUTAI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the above problems, the present invention provides a conductive rubber roller, which is characterized in that the rubber composition covered on the surface of the metal shaft core has a double-layer structure, and each layer of rubber mainly contains a blend of polar rubber and non-polar rubber Composition, each layer of rubber composition achieves the specific performance requirements of the conductive rubber roller, the inner rubber (2) near the shaft core mainly solves the problem of reducing hardness and resistance, and the surface rubber (3) solves the uniformity of resistance and resistance to ambient temperature and humidity Stability and contamination resistance issues of rubber rollers

Method used

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Examples

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Embodiment 1～ Embodiment 3

[0026] (1) Mixing of rubber

[0027] The mixing process of the mixed rubber for the inner foam layer is as follows: First, fully mix ECO and NR in an internal mixer at about 50°C according to a certain ratio, then add carbon black first, and then wait for 5 minutes after mixing. Add active agents such as stearic acid, accelerators, vulcanizing agents and other rubber compounding agents to mix them evenly with the rubber, and control the discharge temperature at about 105±5°C. The mixing process of the rubber compound for the outer non-foamed rubber layer is similar to the mixing process of the rubber compound for the inner foam layer.

[0028] (2) Extrusion molding and vulcanization

[0029] Add the mixed inner and outer layer rubber composition into a double-layer screw extruder to extrude into a double-layer tubular shape, and at the same time insert the metal shaft core into the center of the inner tubular unvulcanized rubber, and then place the semi-finished product in a ...

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Abstract

The invention relates to a conductive rubber roller. The conductive rubber roller consists of a metal shaft core and a double-layer rubber layer covered on the surface of the metal shaft core; the inner layer is a foamed rubber layer formed by adding a foaming agent into a mixed glue stock consisting of epichlorohydrin rubber and natural rubber; and the outer layer is a high-crosslink-degree non-foamed rubber layer in which mixed rubber consisting of butadiene rubber and nitrile rubber is used as a main body. The hardness of the rubber on the inner layer is more than Shore C15 degrees and less than Shore C70 degrees; the hardness of the rubber on the outer layer is more than Shore A40 degrees and less than Shore A90 degrees; and the hardness ratio of the rubber on the outer layer to the rubber on the inner layer is 1.5 to 2.1; and a hardness difference value is 10 to 40.

Description

technical field [0001] The present invention relates to a conductive rubber roller used in an electrostatic recording device such as an electrophotographic copier, a laser printer, a facsimile, and more particularly to a developing roller, a charging roller and a transfer roller of the above-mentioned electrophotographic device. Background technique [0002] The development trend of laser printers and various electronic imaging devices is high-speed printing, high-quality images, color image imaging and miniaturization of imaging devices. These technological advancements all rely on the improvement and optimization of the performance of various conductive rubber rollers in the electronic imaging process. The technical difficulties that need to be overcome most for various conductive rubber rollers are to realize the low hardness, conductivity and non-polluting properties of rubber rollers. [0003] The low hardness is to ensure the uniform contact between the conductive rubb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/00C08L71/00C08L7/00C08L9/02C08L9/00
Inventor 李静洪稚辉
Owner SHENZHEN LEPUTAI TECH CO LTD
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