JPH03170566A - Coating material for treating ozone, ozone treating filter, and electronic image processing apparatus - Google Patents

Abstract

PURPOSE:To obtain a coating material which can give a coating film which can remove ozone in good efficiency by mixing an ozone-treating substance with an organic binder and a blowing agent. CONSTITUTION:The title coating material is obtained by dispersing 3-100 pts.wt. ozone-treating substance which can decompose or adsorb ozone (e.g. palladium- carbon powder) in 100 pts.wt. organic binder having a solid content of 2-100wt.% (e.g. butyral resin/ethanol mixture) and adding a blowing agent (e.g. dinitrosopentamethylenetetramine). An ozone-treating filter is obtained by applying the above coating material to either surface of a double-coated tape. An electronic image-processing apparatus is constituted of an image forming part containing a sensitizer drum and an electrostatic application device and used for forming an image by an electrostatic application system and the above ozone-treating filter disposed in a position on which a stream of air generated by the rotation of the sensitizer drum strikes.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to paints, filters, and image processing devices, particularly,
The present invention relates to an ozone treatment paint, an ozone treatment filter, and an electronic image processing device that forms images using an electrostatic application method.

[Conventional technology and its issues]

An electronic image processing device equipped with an image forming section using an electrostatic application method includes a charging step of charging a photoreceptor to a predetermined charge, a step of transferring a toner image formed on the photoreceptor onto a transfer paper, and a step of transferring the toner image to a transfer paper. Ozone is generated during the process of separating the transferred paper from the photoreceptor. In other words, in these processes, active particles of oxygen are produced by inelastic collisions between charged particles and oxygen molecules that occur when air is ionized by corona discharge, and ozone is produced by the reaction between these active particles and oxygen molecules. .

Such ozone is adsorbed on the surface of the photoreceptor, forms an oxide film, and lowers the resistance of the surface of the photoreceptor. Furthermore, when an organic photoreceptor is used, the photoreceptor reacts with ozone, reducing the sensitivity of the photoreceptor.

These can cause image defects such as image smearing and blurring on the photoreceptor. Further, ozone generated within the electronic image processing device is discharged outside the device by a fan or the like. For this reason, the ozone concentration in the air increases, but it is said that high concentrations of ozone in the air may have an adverse effect on the human body.

A first object of the invention is to provide an ozone treatment paint that provides a coating film that can efficiently remove ozone.

A second object of the invention is to provide an ozone treatment filter that is easy to install and can efficiently remove ozone.

A third object of the invention is to provide an electronic image processing device that can efficiently remove ozone within the device.

[Means to solve the problem]

The ozone treatment paint according to the first invention is for forming a coating film for removing ozone from the air. This paint contains an ozonated substance, an organic binder, and a blowing agent.

Ozone treatment filter 1 according to the second invention includes a double-sided tape and an ozone treatment substance attached to one side of the double-sided tape.

An electronic image processing device according to a third aspect of the invention forms an image using an electrostatic application method. This electronic image processing device includes an image forming section that includes a photoreceptor drum and an electrostatic application device, and is arranged at a position where an air flow generated by the rotation of the photoreceptor drum comes into contact with an image forming section for forming an image using an electrostatic application method. It is equipped with an ozone treatment filter.

[Effect]

The ozone treatment paint according to the first invention forms a porous coating film containing the ozonation substance due to the action of the foaming agent.

Since such a coating film has a large contact area with ozone, it can efficiently remove ozone.

The ozone treatment filter according to the second invention includes double-sided tape. Therefore, the ozone treatment filter of the present invention can be easily placed at a predetermined location and can efficiently treat ozone.

In the electronic image processing device according to the third aspect of the invention, an image is formed on the photosensitive drum at the bottom of the image form using an electrostatic application method. At this time, ozone is generated from the electrostatic application device. This ozone circulates according to the air flow generated around the photoreceptor drum as the photoreceptor drum rotates. Then, the circulating ozone is efficiently removed by an ozone treatment filter placed at a position where the airflow hits.

Therefore, the ozone concentration inside the device is reduced, the deterioration of the photoreceptor is suppressed, and the ozone concentration in the exhaust gas is reduced. [Example] Figure 1 shows an example in which the present invention is applied to a copying machine. In FIG. 1, the upper surface of the copying machine main body 11 has an original platen l.
2 is fixed, and a document holder 13 is attached to the upper part of the document table l2 so as to be openable and closable.

On the right side of the copying machine main body 11, there are paper feed cassettes 14 and 15.
is attached removably. A paper discharge tray l8 from which copied sheets are discharged is attached to the left side of the copying machine main body l1 in the figure.

Inside the copying machine main body 11, an exposure device 19 for reading a document is provided on the upper side thereof. This exposure device 19 is protected from a light source, a ξ beam, and the like. Further, an image forming section 10 is arranged in the center of the copying machine main body 1l. Paper feed cassette}14.15 and image forming section 1
0 and downstream of the image forming unit 10, there are a paper feed conveyance path 27 and a paper discharge conveyance path 28 for conveying paper, respectively.
is provided. A fixing device 30 is arranged between the paper discharge conveyance path 28 and the paper discharge tray 18 to fix the transferred image on the conveyed paper.

The configuration of the image forming section 10 is shown in FIG. Image forming section 10
A photosensitive drum 20 on which an electrostatic latent image is formed is located in the center of the
is located. Around the photoreceptor drum 20, there is a charging device 2l that charges the photoreceptor drum 20 to a predetermined charge;
A blank lamp 32 for trimming or masking the electrostatic latent image on the photoreceptor drum 20, a developing device 22 for developing the electrostatic latent image, a transfer device 23 for transferring the toner image onto paper, and the photoreceptor drum 20. a paper separating device 24 for separating paper from the paper, a cleaning device 25 for removing residual toner on the photosensitive drum 20, and a cleaning device 25 for removing residual toner on the photosensitive drum 20;
An eraser lamp 31 is arranged to remove the charge remaining on the top. The photosensitive drum 20 is rotationally driven in the direction of the arrow in the figure by a drive motor (not shown). As a result, an air flow is generated around the photosensitive drum 20 as shown by the arrows in the figure.

In the image forming section 10, the charging device 21 and the like disposed around the photoreceptor drum 20 are charged with osmotic acid at the portion of the outer wall surface on the upstream side of the air flow generated by the rotation of the photoreceptor drum 20 that is hit by the air flow. A treatment substance coating layer 34 (an example of an ozone treatment filter) is formed. The ozone treatment substance used in the ozone treatment substance coating layer 34 is, for example, an ozone decomposition substance or an ozone adsorption substance. Examples of ozonolytic substances include palladium-carbon powder, metal oxides such as manganese dioxide and lead peroxide, various metals such as nickel and rhodium, and binary composite oxide powders consisting of titanium and silicon. . Note that when powder of a binary composite oxide consisting of titanium and silicon is used in combination with manganese dioxide, the ozone decomposition effect is enhanced. Examples of ozone adsorbing substances include activated carbon, silica gel, and alumina.

The ozone treatment substance coating layer 34 can be formed by applying a paint in which the ozone treatment substance is dispersed in an organic binder to the outer wall surface of the charging device 2l and the like. The organic binder used in the paint includes polymers such as polyacrylic esters such as polycyanoacrylate, polymethacrylic esters, polyvinyl acetate, and polyethylene, vinyl acetate-acrylic ester copolymers, Examples include emulsions of acetal resin, butyral resin, polyimide resin, polyamide resin, and styrene-butadiene copolymer. These organic binders usually have a binder solid content of 2 to 100% by weight.
, preferably in an amount of 5 to 50%. The mixing ratio of the organic binder and the ozonated substance is
3 parts of ozonation substance per 100 parts by weight of organic binder
~100 parts by weight is desirable, and more preferably 5 to 50 parts by weight. If the amount of the ozone treatment substance is less than 3 parts by weight, a sufficient ozone treatment effect cannot be obtained. On the other hand, if the amount exceeds 100 parts by weight, no significant effect will be obtained depending on the amount mixed, and the cost will only increase.

Furthermore, the coating layer of the ozonated substance may be easily peeled off.

The paint for providing the ozonated substance coating layer 34 may be a foamable paint. The foamable paint is a paint made of the above-mentioned ozonated substance, organic binder, and solvent to which a foaming agent is further added, and this is the paint according to the first invention. As the blowing agent, for example, sodium bicarbonate, ammonium carbonate, dinitrosobentamethylenetetramine, azobisformado, azobisisoputyronitrile, barium azodicarboxylate, trihydrazinotriazine, etc. can be used. Examples of specific foamable paints include: (2) 80 parts by weight of manganese dioxide, 10 parts by weight of butyral resin, and 0.05 parts by weight of ammonium carbonate were dissolved in 100 parts by weight of ethanol.

(2) 95 parts by weight of palladium-carbon powder, 10 parts by weight of butyral resin, and 0.03 parts by weight of dinitrosopentamethylenetetramine were dissolved in 10 parts by weight of ethanol.

■100 parts by weight of mixed powder of binary composite oxide consisting of titanium and silicon and manganese dioxide, and acrylic resin I
Part by weight of O and 0.08 part by weight of azobisformamide were dissolved in 80 parts by weight of toluene.

The above-mentioned paints containing ozonated substances are usually applied by spraying, brushing, or other methods.
The organic binder in the applied paint is usually removed by heat treatment at 100°C for about 1 minute. As a result, the ozone treatment substance is baked onto the charging device 21, etc.
An ozonated substance coating layer 34 is formed.

Note that when a foaming paint is used, a porous ozonated substance coating layer 34 is formed by the action of the foaming agent.

Next, the effects of this embodiment will be explained.

In the copying machine, during image processing, negative polarity corona discharge is performed in the charging device 2l of the image forming section 10, the transfer device 23, and the paper separation device 24.

At this time, ozone is generated from the charging device 21, the transfer device 23, and the paper separation device 24.

This ozone circulates around the photosensitive drum 20 due to the airflow generated around the photosensitive drum 20. The air flow generated by the rotation of the photosensitive drum 20 hits the ozonated substance coating layer 34 . At this time, ozone contained in the air flow is decomposed or adsorbed by the ozone treatment substance coating layer 34.

As a result, ozone generated from the charging device 21 and the like is efficiently removed. As a result, the ozone concentration in the copying machine is reduced, the deterioration of the photosensitive drum 20 is suppressed, and the ozone concentration in the exhaust gas is reduced.

In addition, when a foamable paint is used, since the ozone treatment substance coating layer 34 is formed porous, the contact area with ozone becomes large, and ozone can be removed more efficiently.

[Other Embodiments] (a) In place of the ozone treatment substance coating layer 34 of the above embodiment, a porous filter 35 containing an ozone treatment substance may be provided on the surface of the image forming unit IO. This filter 35 is arranged, for example, between the charging device 21 and the blank lamp 32 or between the blank lamp 32 and the developing device 22.

In this embodiment, although it is necessary to add a separate member, it is possible to increase the contact area between ozone and the ozone treatment substance, so that ozone can be removed more efficiently.

(b) In the above embodiment, an ozone-treated substance't coating layer 34 was provided as an ozone-treated filter, but instead of the coating layer 34, a tape-shaped ozone-treated filter as shown in FIG. 3 (according to the second invention) was used. A filter) may be attached to the charging device 21 or the like.

In FIG. 3, a tape-shaped filter 40 is composed of a double-sided tape 4l having adhesive layers 41a on both sides, and a powdered ozone treatment substance 42 is attached to the adhesive layer 41a on one side.

The filter 40 can be easily attached to the charging device 21, etc., and can be easily replaced, so that ozone can be removed efficiently. (C) Ozone treatment paint according to the first invention and the second invention
The ozone treatment filter according to the invention may be used in a drive motor of an image processing device, a paper separation device, a process cartridge equipped with staggered shutters for exhaust, and the like.

〔Effect of the invention〕

In the ozone treatment paint according to the first invention, a porous coating film is formed. Therefore, according to the present invention, an ozone treatment paint that can efficiently remove ozone can be realized. According to the second invention, it is possible to realize an ozone treatment filter that can be easily attached to a predetermined site and can efficiently process ozone.

In the third aspect of the invention, an ozone treatment filter is placed at a position where the airflow generated by the rotation of the photoreceptor drum hits. Therefore, it is possible to efficiently remove ozone within the device, suppress deterioration of the photoreceptor drum, and reduce the ozone concentration in the exhaust gas.

[Brief explanation of the drawing]

FIG. 1 is a schematic vertical cross-sectional view of an embodiment of the third invention, FIG. 2 is a schematic vertical cross-sectional view of an image forming section, and FIG. 3 is a schematic perspective view of another ozone treatment filter. 10... Image forming section, 20... Photosensitive drum, 2l
... Charging device, 23... Transfer device, 24... Paper separation device, 34... Ozonated substance coating layer, 40...
・Filter 41...Double-sided tape, 42...Ozone treatment material.

Claims (3)

[Claims] (1) An ozone treatment paint for forming a coating film for removing ozone from the air, which comprises an ozone treatment substance, an organic binder, and a foaming agent. (2) Double-sided tape, an ozonated substance attached to one side of the double-sided tape; Ozone treatment filter with. (3) An electronic image processing device that forms an image using an electrostatic application method, which includes a photoreceptor drum and an electrostatic application device, an image forming section for forming an image using the electrostatic application method, and the photosensitive member. An electronic image processing device comprising: an ozone treatment filter placed at a position exposed to the air flow generated by the rotation of the body drum;