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Conductive rubber roller

A rubber roller and rubber technology, applied in the field of transfer rollers of transfer printing components, can solve problems such as difficulty in achieving low resistance and small environmental dependence

Inactive Publication Date: 2008-11-05
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, low resistance and little environmental dependence are difficult to achieve in some cases, and further improvements have been sought

Method used

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  • Conductive rubber roller
  • Conductive rubber roller
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1 and comparative example 1-1 to 1-6

[0105] The results obtained are given in Table 1 together.

[0106] As shown in Table 1, it can be seen from Example 1-1 and Comparative Examples 1-1 to 1-5: ethylene oxide-propylene oxide-allyl glycidyl ether terpolymer is required in the present invention Is appropriate when it is within the range. More specifically, in Comparative Example 1-1, in which the melting peak temperature is higher and the melting enthalpy change ΔH is larger than those within the range of the present invention, and the copolymerization ratio of allyl glycidyl ether is smaller than the range of the present invention, Ethylene oxide has such high crystallization properties that it has a small resistivity reduction effect. At the same time, since the copolymerization ratio of allyl glycidyl ether is small, the obtained roller has great environmental dependence and poor resistance to contamination of the photosensitive member. In addition, in Comparative Example 1-2, in which the melting peak temperature ...

Embodiment 2-1 to 2-4 and comparative example 2-1

[0109] The test results obtained are given in Table 2 together.

[0110] As shown in Table 2, it can be seen from Examples 2-1 to 2-4 that the mixing amount of the ethylene oxide-propylene oxide-allyl glycidyl ether terpolymer used in the present invention is preferably 5 To 20 parts by mass. More specifically, in Example 2-4 in which the mixing amount thereof was greater than 20 parts by mass, the obtained conductive rubber roller showed large environmental dependence.

[0111] It can also be seen that, compared with Example 2-3, Comparative Example 2-1 shows that the resistance of the conductive rubber roller is not mixed with any ethylene oxide-propylene oxide-allyl glycidyl ether terpolymer. The conductive rubber roller controlled by only acrylonitrile-butadiene rubber and epichlorohydrin-based rubber shows a higher energization durability than the ethylene oxide-propylene oxide-allyl glycidyl ether ternary in accordance with the present invention. Poor polymer of Example 2-3....

Embodiment 3-1 and comparative example 3-1

[0113] The test results obtained are given in Table 3 together.

[0114] As shown in Table 3, it can be seen from Example 3-1 and Comparative Example 3-1 that the rubber composition used in the present invention more preferably contains an ion conductive agent. It is seen that Example 3-1, which is the same as Example 1-1 except for mixing 1 part by mass of the ion conductive agent, has achieved low resistivity more effectively, while retaining the small environmental dependence obtained in Example 1-1. In addition, no problem of contamination of photosensitive components was found. In contrast, for Comparative Example 3-1, in which 1 part by mass of the ion conductive agent was mixed into the rubber composition using the ethylene oxide-propylene oxide-allyl glycidyl ether terpolymer outside the scope of the present invention However, the effect of reducing the resistivity is insufficient, while the obtained roller has a large environmental dependence and further causes contaminat...

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Abstract

A conductive rubber roller comprising a conductive core material and provided thereon a rubber layer; the rubber layer being formed by using a rubber composition containing as rubber components at least a polar rubber and an ethylene oxide-propylene oxide-allyl glycidyl ether terpolymer; the ethylene oxide-propylene oxide-allyl glycidyl ether terpolymer having a melt peak temperature of from 20 to 30 DEG C. and a melt enthalpy change DeltaH of from 40 to 70 mJ / mg as measured with a differential scanning calorimeter; and the allyl glycidyl ether in the ethylene oxide-propylene oxide-allyl glycidyl ether terpolymer being in a copolymerization ratio of from more than 10 mol % to 20 mol % or less.

Description

Technical field [0001] The present invention relates to conductive rubber rollers used in imaging devices such as electrophotographic copying devices, printers, and electrostatic recording devices, and more particularly to conductive rubber rollers used as, for example, transferable images based on toner images to recording The medium is a transfer roller of a transfer assembly on paper; the toner image is formed by an imaging method such as an electrophotographic process or an electrostatic recording process and remains on an image bearing member such as an electrostatic photosensitive member. Background technique [0002] In image forming apparatuses such as electrophotographic copying apparatuses and electrostatic recording apparatuses, contact charging systems are common in which a conductive rubber roller to which voltage is applied is pressed against the surface of an electrostatic photosensitive member to charge it statically. Around the electrostatic photosensitive member...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/02G03G15/16
Inventor 浦野龙太梅木惠理香小山直树
Owner CANON KK
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