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Fixing member, fixing device, and image forming apparatus

a fixing device and fixing member technology, applied in the direction of electrographic process apparatus, instruments, optics, etc., can solve the problems of abraded portion not being adequately heated or pressured, image quality deterioration, and fixing failure in the abraded portion, so as to reduce uneven abrasion of edges and improve durability

Inactive Publication Date: 2016-06-28
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0013]The present invention can solve the aforementioned various problems in the art, and exerts an extremely excellent effect of providing a fixing member which can reduce uneven abrasion of edges of printing paper serving as a recording medium and has improved durability.

Problems solved by technology

Accordingly, in the case of using printing paper having a wide width beyond the abraded portion, image quality is deteriorated, which is problematic.
That is, when the fixing member is partially abraded, the abraded portion is not appropriately heated or pressured.
Therefore, fixing failure may occur in the abraded portion or image failure may occur by transferring a shape of the abraded portion onto an image.
Recently, an elastic layer which has satisfactory elasticity is needed to be formed as an intermediate layer for the purpose of achieving fixability suitable for a color image, which is problematic in causing abrasion resistance to be significantly lowered.
However, in this method, a molten toner is deposited on the inorganic filler portion to thereby significantly deteriorate releasability.
In addition, the releasing layer is greatly increased in hardness, which deteriorates image quality.
These problems are especially significant in a color image.
In the case of the inorganic filler, the effect of improving abrasion resistance is deteriorated over time due to exfoliation of the filler.
Further, the exfoliated filler may act as abrasive to promote abrasion.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0069]A cylindrical base (polyimide) having a length of 320 mm and thickness of 50 μm was coated with a primer layer for silicone, and was dried. Silicone rubber (DY35-2083, product of Toray Industries, Inc.) was applied thereonto so as to have a thickness of 200 μM, followed by heating at 150° C. for 30 min, and secondarily vulcanizing at 200° C. for 4 hours. Thus, an elastic layer was formed on the base.

[0070]Then, a primer for electroconductive fluororesin which contains carbon (product of Du Pont-Mitsui Fluorochemicals Company, Ltd.) was applied onto the elastic layer, and then PFA serving as a releasing layer was applied thereonto so as to have a thickness of 15 μm. The resultant was used as a fixing member. The PFA, which was powdered fluororesin (MP102, product of Du Pont-Mitsui Fluorochemicals Company, Ltd.), was applied by a powder coating, followed by baking at 340° C. for 30 min, removing from a furnace, and standing to cool. The resultant was used as a belt sample.

[0071]...

example 2

[0080]A fixing member was produced and evaluated in the same manner as in Example 1, except that the belt sample was not masked upon the plasma treatment.

example 3

[0081]A fixing member was produced and evaluated in the same manner as in Example 1, except that the reaction gas was changed from argon to oxygen (99.99%).

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PUM

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Abstract

A fixing member, including a releasing layer, wherein the releasing layer contains a fluoropolymer and a polysiloxane having a cross-linked structure, and wherein the fixing member is used in a process for heating a toner image on a recording medium to thereby fix the toner image onto the recording medium.

Description

TECHNICAL FIELD[0001]The present invention relates to a fixing device to be provided in an electrophotographic image forming apparatus such as a copier, a printer, and a facsimile; and a high durable fixing member to be provided in the fixing device.BACKGROUND ART[0002]Conventionally, a device employing an electrophotographic system, for example an image forming apparatus such as a copier, a printer, and a facsimile, typically includes a rotatable photoconductor drum. In the device, a photoconductive layer of the photoconductor drum is uniformly charged, followed by being exposed to laser beams emitted from a laser scanning unit, to thereby form a latent electrostatic image on the photoconductor drum. The latent electrostatic image is developed with a toner, and then is transferred onto a transfer sheet serving as a recording material. The resulting transfer sheet is passed through a heat fixing device, to thereby thermally fix the image thereon. The device is equipped with a system...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G03G15/20
CPCG03G15/206G03G15/2057
Inventor KONDOH, TSUNEAKINATORI, JUNICHIROSUGAWARA, TOMOAKI
Owner RICOH KK
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