Production method of conductive rubber sponge transfer roller, and sponge composite

Abstract

The invention relates to a production method of a conductive rubber sponge transfer roller, which comprises the following steps of: producing a sponge layer of the transfer roller by a composite composed of epichlorohydrin rubber with ionic conductivity served as main rubber polymer component; processing the composite by an intermittent normal pressure hot air oven vulcanization method; extrudingcomposite mixed rubber by an extruder into tubular things, intercepting the tubular things according to required length, passing through central holes of un-vulcanized tubular thins with stainless steel cores, and bridging the stainless steel cores on a bracket disc for vulcanization; placing the bracket disc for vulcanization on a bracket trolley for vulcanization, conveying the bracket trolley for vulcanization into a normal pressure hot air oven for vulcanization so as to obtain sponge tubes, then, passing through the vulcanized sponge tubes with metallic core shafts for the transfer rollers, and grinding the sponge tubes comprising the metallic core shafts to get the conductive rubber sponge transfer rollers. The epichlorohydrin rubber sponge tubes formed by the composite provided by the invention are low in rigidity, low in electric resistance, uniformly foamed and free of abnormal deformation, and after being vulcanized, the rigidity of the sponge tubes is 25-45 degrees, the electric resistance of the sponge tubes is not more than 3*108 omega, consequently, the sponge tubes are produced into the conductive rubber sponge transfer rollers.

Description

technical field [0001] The invention relates to a manufacturing method of a conductive rubber sponge transfer roller, and more particularly relates to a manufacturing method of a conductive rubber sponge transfer roller that can be effectively applied to laser printers and copiers. Background technique [0002] The conductive rubber sponge transfer roller used in laser printers and copiers requires uniform and stable resistance value and suitable low hardness, and the resistance value range is 5×10 7 ~3×10 8 Ω (test environment 22±2°C; RH 50±5%) is ideal, the hardness range is 25-45 degrees (Shore W or Ascar C hardness tester) is ideal, and the cell diameter of the sponge is ideal below 200μm . The method of making the above-mentioned conductive rubber sponge transfer roller conductive mainly includes the method of mixing conductive fillers such as conductive carbon black, metal oxide powder, and organic conductive agent into the rubber to form conductivity, that is, the m...

AI Technical Summary

Problems solved by technology

[0007] The present invention solves the problem that the chloroether rubber sponge tube with low resistance and low hardness vulcanized by the continuous vulcanization method is easily deformed. The present invention adopts a large proportion of chloroether rubber in the rubber polymer component of the conductive rubber sponge composition to ensure Low resistance, and the intermittent vulcanization method is adopted. According to the characteristic of rubber sponge tube to be vulcanized, it does not need to be vulcanized under pressure, and it can also be vulcanized in hot air at normal pressure, so it is not necessary to use Vulcanization tank

The present invention adopts the vulcanization method of the intermittent atmospheric pressure hot air oven to process the chloroether rubber sponge tube, which not only solves the deformation problem that the above-mentioned continuous vulcanization method vulcanizes the rubber sponge tube containing a large proportion of chloroether, but also is different from The previous intermittent vulcanization method overcomes the problem that the vulcanization tank requires specially trained personnel to operate the pressure vessel, and the associated problem of the high total investment cost of the boiler equipment required, and the problem that the boiler has an adverse impact on the environment

Images