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Foamed rubber member

一种发泡橡胶、部件的技术，应用在发泡橡胶部件领域，能够解决传送力降低、图像不良等问题，达到耐久性优异、硬度低的效果

Active Publication Date: 2010-03-31
SYNZTEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sponge roller may cause the following problems: if it is used for a long time, it will cause image defects (transfer, developing roller), and the conveying force will decrease (paper feed, conveying roller)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] To 99.8 parts by mass of methyl ethyl ketone, 0.2 parts by mass of a terminal isocyanate compound (MR-400: manufactured by Nippon Polyuretan Co., Ltd., hereinafter referred to as isocyanate compound (1)) having a number average molecular weight of less than 500 was added and mixed to prepare a treatment liquid. The treatment solution was kept at 25° C., dipped for 30 seconds to allow the treatment solution to fully infiltrate the rubber roller 1, then dried naturally for 1 hour, and heated in an oven kept at 120° C. for 1 hour to obtain the rubber roller of Example 1. Foam rubber rollers.

Embodiment 2

[0059] The foam rubber roller of Example 2 was obtained like Example 1 except having used 99.5 mass parts of methyl ethyl ketone (MEK) and 0.5 mass parts of isocyanate compounds (1).

Embodiment 3

[0061] Except having used 99.0 parts by mass of methyl ethyl ketone and 1.0 parts by mass of isocyanate compound (1), it carried out similarly to Example 1, and obtained the foam rubber roller of Example 3.

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Abstract

An object of the present invention is to provide a foamed rubber member which has low hardness and excellent durability. The foamed rubber member of the invention, produced through an impregnation treatment of a foamed elastic body with a treatment liquid containing an isocyanate compound and an organic solvent, the foamed elastic body being produced by foaming a base rubber, exhibits a compression set smaller than that of the foamed elastic body before undergoing the impregnation treatment, and exhibits a percent increase in stress, with respect to the stress of the foamed elastic body before undergoing the impregnation treatment, of 50% or less.

Description

technical field [0001] The present invention relates to foamed rubber parts. The above-mentioned foamed rubber member is particularly suitable for various paper feeding and conveying rollers used in various OA equipment such as copiers, facsimile machines, and various printers, etc., or charging rollers and transfer rollers used in image forming devices. , developing rollers, conductive rollers, etc. Background technique [0002] For transfer rollers, developing rollers, paper feed rollers, and conveying rollers of various OA equipment, it is required to reduce hardness so as not to damage contacting parts such as photoreceptors and the like. Conventionally, EPDM rubber has been used for such rollers (see Patent Documents 1 and 2). However, as described in these documents, when using solid rubber to reduce the low hardness, it is necessary to add a large amount of softener, and as a result, there are problems in staining due to bleeding and durability. [0003] On the oth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/00G03G15/00B65H3/06B65H5/06
CPCC08J2483/00C08J2475/00C08J2321/00C08J9/405C08J2427/00Y10T428/1386
Inventor 笹川刚纪平川直树
Owner SYNZTEC
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