JPH0416442A - Paper feed and carrier member - Google Patents

Abstract

PURPOSE:To obtain a paper feed and carrier member having an excellent abrasion resistance by forming, an electrodeposition painting coat including an ultrafine particulate metalic pulverulent body of an average particulate diameter between 0.01 and 3.0mum, a pulverulent body obtained through metal plating on a ceramic pulverulent body surface of an average particulate diameter between 0.1 and 3.0mum and a pulverulent body obtained through metal plating on a natural mica pulverulent body surface, on a base material. CONSTITUTION:An electrodeposition painting coat 1 obtained by means of electrophoresis is formed on a paper feed and carrier member such as a roller member consisting of a metalic member or a nonmetalic member 4 by using an electrodeposition paint including an ultrafine particulate metalic pulverulent body of an average particulate diameter 0.01 and 3.0mum, a pulverulent body obtained through metal plating on a ceramic pulverulent body surface of an average particulate diameter between 0.1 and 3.0mum and a pulverulent body obtained through metal plating on a natural mica pulverulent body surface in electrodeposition-capable resin. Owing to this, a paper feed and carrier member having homogeneously dispersed particulate inclusion, a small secular change, an excellent abrasion resistance, satisfactory surface homogeneity and furthermore excellently controllable electrical conductivity can be obtained.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a paper passing and conveying member (hereinafter abbreviated as "paper passing and conveying member"), and more specifically, to office automation equipment, home appliances,
The present invention relates to a conveying member used in a paper passing member such as a printing device, or a portion that conveys paper-like film, paper-like plastic, other sheet-like members, or paper.

[Conventional technology]

Conventionally, paper passing and conveying members such as rollers used for conveyance in office automation equipment, home appliances, and printing machines are coated with rubber after plating on steel materials, and are coated with Teflon (registered material). Trademark) etc. coated,
Alternatively, after plating the steel material, alumina is electrostatically adsorbed, or composite plating containing SIC or diamond is applied, or the surface of the steel material is roughened by sandblasting, laser, etc. These methods include those that are plated after being oxidized, or those that are spray-painted onto steel using a coating solution containing fine metal particles and fillers.

Further, these paper passing/conveying members are grounded through a constant voltage element in order to control the resistance value of the paper passing portion to an intermediate resistance.

[Problem that the invention attempts to solve]

However, conventional paper passing and conveying members have the following drawbacks.

First, paper passing and conveying parts, in which fine metal particles and fillers are mixed into the paint and spray-painted onto the rollers, require a high level of surface uniformity like the conveying parts, even if an automated line is used in the manufacturing process. Painting robot 1
There is a limit to the ability to coat multiple pieces at the same time using a stand, and furthermore, the surface condition of the coating film becomes uneven due to the diffusion of the paint, which poses a major problem in terms of both mass production and surface properties.

In addition, in paper passing and conveying parts that are coated with rubber after being plated on the steel material of the roller and then coated with Teflon, the rubber deforms over time due to repeated use, resulting in a decrease in the accuracy of the outer diameter. However, there is a problem of poor paper feeding and ejection, which reduces the product value, requires a long processing process, has low work efficiency, and increases manufacturing costs, which poses a major problem in mass production.

Next, in paper passing and conveying parts where the surface of a roller member, for example a stainless steel surface, is sandblasted to increase the surface friction coefficient, the hardness of the material is large, so it is difficult to achieve high processing accuracy, and the material cost is high. There are also problems such as increased processing costs.

Similarly, paper passing and conveying members that have a roughened surface formed by sandblasting on a steel material are susceptible to rust from the surface, so it is necessary to perform rust prevention treatment such as plating in the next step for the purpose of corrosion prevention. In this case, since the sandblasted surface with low outer diameter accuracy is plated, the outer diameter precision further decreases, and the cost increases due to an increase in the number of steps, which is not suitable for mass production.

In addition, in the case of paper passing and conveying parts such as rollers, the steel surface has been roughened with a laser to increase the coefficient of friction.
Only one piece can be processed at a time, and the processing time is long, so it is not suitable for mass production.

Furthermore, paper passing and conveying parts are made by plating steel and electrostatically adsorbing alumina onto the plate to increase the wear resistance and hardness of the surface. is unstable, and there is a limit to the ability to produce products of uniform quality in large quantities at low prices.

In addition, in paper passing and conveying parts where the surface of the metal member is electroless plated and then composite plating containing SiC, diamond, etc. is applied in the next process, for example, in the case of composite plating, impurities may be mixed into the bath. There is a problem that it is easy to stabilize and cannot withstand continuous use. Furthermore, there are also disadvantages of high cost of the plating solution and poor uniform dispersibility, resulting in a major problem in processing costs.

On the other hand, it is an important factor to impart electrical conductivity to paper passing and conveying members. Conductive paper passing/conveying members are used in many paper passing parts in copying machines and other devices, and the resistance value of the paper passing parts is controlled.

In other words, if the paper passing/conveying member in the paper passing part that comes into contact with the paper is insulating, the paper passing/conveying member will become charged due to friction with the paper in a low humidity environment, and toner will adhere to that member. The paper becomes smudged. In addition, if the paper passing/conveying member in the paper passing section has low resistance, in a high humidity environment, the paper absorbs moisture, so the paper itself becomes a low resistance material, and the charge charged to the copy paper by the transfer charging machine leaks through the transfer guide, resulting in missing images.

FIG. 4 is a schematic diagram showing the parts where the transfer kite is used in the copying machine. As shown in the figure, in the conventional copying machine, the transfer guide 14, which is a Ni-plated iron ball, the fixing entrance guide, etc. are grounded via a constant voltage element (varistor) 12 to control the intermediate resistance. This prevented toner stains and transfer omissions. However, this method is not suitable for mass production because the number of parts and work steps increase. In addition, 9 is a photoreceptor, 10 is a toner, 11 is a transfer material, and 13 is a transfer charging machine.

The present invention was made in order to solve the problems of the prior art, and provides a paper passing and conveying member that has excellent wear resistance, good surface uniformity, and can control conductivity. The purpose is to provide the following.

[Means to solve the problem]

That is, in the present invention, an average particle size of 0.01 to 3.
0 am ultrafine metal powder, average particle size 0.1-3.0
This paper passing/conveying member is characterized by forming an electrodeposited coating containing metal-plated powder on the surface of micrometer ceramic powder and metal-plated powder on the surface of natural mica powder.

The present invention will be explained in detail below.

The present invention consists of ultrafine metal powder in an electrodepositable resin, powder with metal plating on the surface of ceramic powder, and natural mica (
Using an electrodeposition coating containing powder whose surface is metal-plated (hereinafter simply referred to as mica), it is electrophoretically deposited onto paper passing and conveying members such as roller members made of metal or non-metallic members. By forming a coating film, the fine particles contained therein are uniformly dispersed, and a paper passing/conveying member with little change over time, excellent wear resistance, good surface uniformity, and excellent conductivity control is obtained. characterized by things.

FIGS. 1(a) to 1(C) are partial cross-sectional views each showing an example of the structure of the paper passing/conveying member of the present invention. Figure 1(a)
In the paper passing/conveying member of the present invention, the catalyst treatment layer 3 and the metal are formed by performing a generally known plastic plating process on the surface of the roller member made of the non-metallic member 4 such as ABS resin. Forming plating layers 2 in sequence,
This is used as a base material and an electrodeposition coating film 1 is formed thereon.

Next, FIG. 1(b) is a partial sectional view showing another configuration of the paper passing/conveying member of the present invention, in which an aluminum anodic oxide film layer 5 is formed on the surface of a metal member 6 such as aluminum,
This is used as a base material and an electrodeposition coating film l is formed thereon.

Further, FIG. 1(C) shows a metal member 80 made of iron material or the like.
A paper passing/conveying member is shown in which a generally known chemical conversion film layer 7 for rust prevention is formed on the surface, and an electrodeposition coating film l is formed thereon using this as a base material.

The base material used for the paper passing/conveying member of the present invention may be either a metal member such as aluminum or iron or a non-metal member such as plastic. The processes shown in (a) to (C) or other normal processes are performed. There are no particular restrictions on non-metallic components, such as office automation equipment, home appliances,
Plastic materials used for paper passing and conveyance members of printing equipment etc. are used, such as ABS, CF/ABS,
Modified PPE.

Examples include modified PPO, GF/PC, etc.

Next, in the method of manufacturing a paper passing/conveying member of the present invention on which an electrodeposited coating is formed, the metal member or non-metallic member is subjected to a base treatment before electrodeposition coating, and then the electrodeposited coating is applied to Forms a coating film.

The electrodeposition paint used for electrodeposition coating contains ultrafine metal powder with an average particle size of 0.01 to 3.0 μm and ceramic powder with an average particle size of 0.1 to 3.0 μm in an electrodepositable resin. Powder whose body surface is plated with metal and mica powder which contains powder whose surface is plated with metal are used. Further, this electrodeposition paint can be anionic or cationic.

As the resin that can be electrodeposited, generally known low temperature curing resins are used, such as acrylic/melamine resins, acrylic resins, epoxy resins, urethane resins, and alkyd resins.

The ultrafine metal powder contained in the electrodepositable resin is not particularly limited, but includes, for example, Ag and Co.

Cu, Fe, Mn, Ni, Pd, Sn,
Examples include Te. The particle size of the ultrafine metal powder is usually an average particle size of 0.01 to 3.0 μm, preferably 0.01 to 3.0 μm.
Of ~1.0 p m is desirable, and 0.01 μm
However, when dispersed in electrodeposition paint, secondary aggregation occurs,
If it exceeds 3.0 μm, it is not preferable because the uniform dispersibility in the paint film decreases.

In addition, as the powder whose surface is metal-plated (hereinafter referred to as metallized ceramic powder), a powder whose surface is metal-plated with Ag, Ni, Cu, etc. is used. . Further, from the viewpoint of cost, electroless plating of nickel and copper is suitable for metal plating on the surface of the ceramic powder.

The particle size of ceramic powder is usually an average particle size of 0.1 to 3.0.
μm1 is preferably in the range of 0.3 to 1.5 μm; if it is less than 0.1 μm, the cost of plating the ceramic will be high (if it exceeds 3.0 μm, the uniform dispersibility in the paint film will decrease, so it is not preferable) In addition, the thickness of metal plating applied to the surface of ceramic powder is usually 0.05 to 0.
．． The thickness is desirably 9 μm, preferably in the range of 0.1 to 0.5 μm.

Furthermore, mica powder whose surface is plated with metal (hereinafter referred to as metallized mica powder) is also used, as is powder whose surface is plated with metal such as Ag, Ni, Cu, etc. From a cost standpoint, electroless plating of nickel and copper is suitable.

The size of the mica powder is (length: 1 m, thickness: 0.1 μm)
) ~ (longer diameter 10 μm 1 thickness 3 μm), especially (longer diameter 2 μm
m1 thickness 0.1 μm) ~ (longer diameter 5pm, thickness 1μm)
) range is desirable, (long diameter 1 μm, thickness 0.1 μm)
If the size is smaller, the cost of plating mica powder will be high.
If the diameter is larger than 10 μm in length and 3 μm in thickness, the uniform dispersibility of metallized mica in the electrocoated film and the abrasion resistance of the electrocoated film will decrease. In addition, the thickness of the metal plating applied to the mica powder surface is usually 0.05 to 0.9μ.
m, preferably 0.1 to 0.5 μm. The mica powder mentioned here refers to minerals that can be plated, such as muscovite, black seismite, sericite, scaly mica, and stilpnomelene.

The particle diameters of the ultrafine metal powder and ceramic powder and the major axis of the mica powder are values measured using a centrifugal sedimentation type particle size distribution analyzer. The measuring device actually used was 5ACP-3 (manufactured by Shimadzu Corporation). Further, the ultrafine metal powder is preferably manufactured using, for example, a thermal plasma evaporation method.

In addition, a commercially available mica powder having a predetermined thickness was used, and when a smaller major axis was required, the commercially available product was wet-pulverized for use.

The mixing ratio of this ultrafine metal powder, metallized ceramic powder, and metallized mica powder is 1
The preferred range is 30 to 300 parts by weight of the ultrafine metal powder and 30 to 300 parts by weight of the metallized mica powder per 00 parts by weight.

Further, the content of the mixture of ultrafine metal powder, metallized ceramic powder, and metalized mica powder in the electrodeposition paint is 5 to 40 parts by weight, preferably 5 to 40 parts by weight based on 100 parts by weight of the electrodepositable resin. A range of 5 to 20 parts by weight is desirable, and by appropriately controlling the amount of the mixed powder added within this range, the conductivity of the electrodeposited film can be controlled to an arbitrary value.

Further, if the content of the mixed powder is less than 5 parts by weight, the conductivity will be low, and if it exceeds 50 parts by weight, the adhesion of the coating film to the base material will decrease, which is not preferable.

Note that the eutectoid of the ultrafine metal powder, metallized ceramic powder, and metallized mica powder is confirmed by an X-ray microanalyzer, and the content thereof can be measured by thermogravimetric analysis.

The method of dispersing the ultrafine metal powder, metallized ceramic powder, and metallized mica powder in the electrodeposition paint can be carried out by using a ball mill for about 24 to 35 hours, and then
An electrodeposition coating solution is prepared by diluting the solution with demineralized water to a solid content of 3 to 20% by weight, preferably 6 to 17% by weight, similar to the generally used electrodeposition coating method. Regarding electrodeposition coating, anionic or cationic coatings can be applied.

For anionic electrolysis conditions, the object to be coated is the anode;
For cationic systems, it is used as a cathode, at a liquid temperature of 20 to 25°C, a pH of 8 to 9, an applied voltage of 50 to 200 V, and a current density of 0.
．． 5 to 3 A/dr+ (and a treatment time of 3 to 6 minutes is desirable.

Next, after washing with water, drain the water and harden in an oven at 100 to 140°C for 20 to 180 minutes to complete. The amount of eutectoid in the coating film at this time is 5 to 50% by weight, preferably 2% by weight.
It is 0 to 40% by weight. The amount of eutectoid was analyzed using a thermogravimetric analyzer.

The thickness of the electrodeposition coating is usually 5 μm or more, preferably 7 μm or more.
It is desirable that the film thickness is 15 μm or more, and by making the film thickness 5 μm or more, it is possible to apply a film with any conductivity to the paper passing/conveying member, and the abrasion resistance can be improved over the entire coating film. Uniform and excellent physical properties can be obtained.

In the present invention, the physical properties of the coating film are improved by dispersing the ultrafine metal powder, metallized ceramic powder, and metallized mica fine powder in a resin and eutectoiding them into the electrodeposition coating film by electrophoresis. Despite the low curing temperature (100° C.), the curing reaction is complete and physical properties equal to or better than those of the high temperature cured film can be obtained.

Next, Fig. 2 shows a test piece of aluminum 53S (size 5 cm x 5 cm St == 1, 0
m m ) containing 12% by weight of acrylic resin, Ni ultrafine metal powder with an average particle size of 0.3 μm and microparticle ceramic powder (A120) with an average particle size of 1 μm.
3) Mix nickel-plated powder with a thickness of 0.1 μm on the surface and mica powder with a major axis of 2.5 μm and a thickness of 0.3 μm with metallized mica powder with a 0.1 μm thick nickel plating on the surface (mixing ratio 1:1:1) is a graph showing the results of measuring the volume resistivity using a contact insulation resistance meter when a coating film with a thickness of 20 μm was formed using an electrodeposition paint containing a mixture of 1:1:1). The measurement area will be 1ci4
This was done by bringing a point contact type probe into contact with the electrodeposition coating film.

In addition, ABS, CF/ABS, modified PPE, modified PP0
Aluminum flakes (size 1.0 mm x 1.4 mm, thickness 25-3
The results of measuring the volume resistivity of a conductive plastic formed by mixing 0 μm) are also shown. At this time, the method for measuring the body and product resistivity of aluminum kneaded material in plastic is described in "Industrial Materials" Vol. 30, No. 10, published by Nikkan Kogyo Shimbun.
The method shown on page 54 was used.

When aluminum flakes are mixed into plastic,
A rapid decrease in volume resistivity is observed in the range of 0-10''Ωcm as the aluminum flake filling rate increases, whereas ultrafine metal powder of Ni and ceramic powder of fine particle size are mixed into the electrodeposition paint. The change in volume resistivity of the electrodeposited coating formed by adding a mixture of nickel-plated powder and metallized mica powder to the surface is gradual, and paper feeding and conveyance with arbitrary resistivity is possible. It is possible to create parts with high precision.

Moreover, since the application is carried out by electrophoresis, there is no localization of the added filler, which occurs when kneading is performed.
A uniform coating film can be obtained over the entire surface of the paper passing/conveying member.

Next, Table 1 shows the test results of durability tests of various roller members. The outer diameter of the roller member tested was 30
Unified into mm.

In Table 1, the substances to be eutectoided in the electrodeposited coating are 6 parts by weight of various additive powders per 100 parts by weight of the acrylic resin.
An anionic electrodeposition paint dispersed in an amount of ~11 parts by weight was prepared, and electrodeposition was performed on each roller member to a film thickness of 10 μm. At this time, the liquid temperature is 20-25℃, the curing temperature is 1
Curing was performed in an oven at 00'C for 60 minutes.

FIG. 3 is a schematic diagram of a surface property tester used to evaluate the wear resistance of a roller member in the durability test.

Using this testing device, the static friction coefficient of the roller member was measured before and after the durability test, and the wear resistance was evaluated.

In the roller member durability test, two roller members of the same type were prepared, and these were attached to a copying machine, and 150,000 sheets of plain paper for copying were passed through the machine.

To measure the coefficient of static friction of the roller member before and after the durability test, as shown in Fig. 3, copy paper (A4 size) 19 is fixed to the lower surface of the copy paper fixing plate 18 with a smooth surface, and the copy paper (A4 size) is fixed with an outer diameter of 30 mm. , length 230 m
1 to 1 from the top.
A maximum load of 2 kg is applied, and the roller member is moved at an angular velocity of ω = 1.
．． It was rotated in the direction of the arrow at 5 rad/sec and the static friction coefficient was measured.

In addition, when the roller member was made of rubber, the judgment was made only based on whether or not paper passing failure occurred during durability.

Table 1 shows the test results when various fine powders were mixed with metallized mica powder with an average length of 2.5 μm and an average thickness of 0.3 μm, and the surface was plated with nickel to a thickness of 0.1 μm.
Shown below.

(note) (1) Durability test number of sheets is 150,000 sheets.

(2) ■ is one in which nickel plating is applied to the Al2O3 surface, and the plating film thickness is 0.1 μm.

(3) ■ is one in which the Al2O3 surface is plated with copper, and the thickness of the plating film is 0.1 μm.

(4) Static friction coefficient measured by surface property tester is 1
．． For those with a score of 2 or less, transport defects occurred.

From the results shown in Table 1, it was found that the abrasion resistance of the transport roller member made of eutectoid ultrafine powder was equal to or better than that of the roller member made of blasted stainless steel.

In addition, steel materials, aluminum materials, AB
There was no change in any case of S resin material.

Furthermore, it is preferable to use the paper passing/conveying member of the present invention in the transfer guide of the copying machine shown in FIG. 4, since the same effect as controlling the resistance value of the member using a constant voltage element can be obtained. be.

From the above, the paper passing/conveying member of the present invention has a large contact area between powders by eutectoiding ultrafine metal powder, metallized ceramic powder, and metallized mica powder by electrodeposition coating. This increases the density and allows a uniform coating to be obtained over the entire surface, both macroscopically and microscopically, so particularly high precision surface uniformity is required, and at the same time, it is also highly abrasion resistant and conductive. This solves the problems of paper passing and conveying members that require the following, and it also contributes greatly not only in terms of characteristics but also in terms of cost.

Furthermore, compared to the case where the paper passing/conveying member is molded by kneading conductive filler into rubber or plastic, the consumption of conductive filler is extremely low when using the paper passing/conveying member of the present invention. Regardless, it is possible to obtain superior wear resistance and arbitrary conductivity, and it is also excellent in economical effects.

〔Example〕

EXAMPLES Hereinafter, the present invention will be explained in more detail according to Examples, but the present invention is not limited to these Examples.

Example 1 ABS resin was used as a 0-lance member with an outer diameter of 30 mm and a length of 2
A piece formed to a thickness of 30 mm was used as an object to be coated.

This ABS resin roller part is CrO3-H2SO4H
20 series etching solution for 1 minute, and then as a sensitizer solution, 30 g of stannous chloride/7. Hydrochloric acid 20ml/
I! After 2 minutes of treatment indoors using
m thickness, chromic anhydride 0.01g/j! It was treated for 1 minute and used as a test piece.

Acrylic/melamine resin (product name: Honeybright C-
IL, manufactured by Honey Kasei Co., Ltd.) 0.1 electroless nickel plating on the alumina surface with an average particle size of 1 μm per 100 parts by weight
7 parts by weight of Co with an average particle diameter of 0.3 μm, and 5 parts by weight of Co with an average major diameter of 2.0 μm and 0.5 parts by weight of Co with an average length of 2.0 μm.
4 parts by weight of nickel-plated metalized mica powder with a thickness of 0.1 μm was added to the surface of the 3 μm mica powder using a ball mill.
After being dispersed for 0 hours, it was diluted to 15% by weight with demineralized water to prepare a coating liquid.

Using this coating liquid, under the conditions of bath temperature 25°C and pH 8-9,
Electrodeposition was carried out for 3 minutes at an applied voltage of 100 to 150 V using the object to be coated as an anode and a 0.51 stainless steel plate as a counter electrode.

After electrodeposition, it was washed with water and cured in an oven at 97°C±1°C for 60 minutes to complete the process. The thickness of the formed electrodeposition coating was 10
~12 μm, and the amount of eutectoid in the coating film was 35 to 40% by weight.

When we tested the abrasion resistance of the electrocoated film that had been formed, we found that the coefficient of static friction of the roller was 1.4 to 1.5, which was a good result even after a durability test on 150,000 sheets of plain paper for copying. It was done. The coefficient of static friction before the durability test was 1.7.
It was ~1.8.

Example 2 Acrylic was added to the transfer guide made of ABS resin.
Melamine resin (product name: Honeybright C-IL.

(Manufactured by Honey Kasei Co., Ltd.) Average particle size 1μ per 100 parts by weight
AI of m! 2.0 parts by weight of 2o3 plated with 0.1 μm nickel and W fine powder with an average particle size of 0.3 μm 4
Weight part and average major axis 2.5 μm, average thickness 0.2 μm (
7) Add 2.5 parts by weight of nickel-plated metallized mica powder with a thickness of 0.1 μm to the surface of the nine mica powder bodies, apply an applied voltage of 100 to 50 V, and keep the other conditions the same as in Example 1. An electrodeposition coating was formed. The thickness of the electrodeposition coating film formed was 10 to 12 μm, and the amount of eutectoid in the coating film was 22 to 27% by weight.

The transfer guide having the electrocoated film formed in this way has a volume resistivity of 10' to 109 (Ωcm).
) and is installed in a copying machine with low humidity (25% RH).
Even after repeated copying 10,000 times under normal conditions, the paper does not become stained due to toner adhesion, and even under high humidity (85% RH) conditions, no malfunctions such as image dropout occur, and the machine can be used normally. Good performance as a paper member was obtained.

This performance did not change during a durability test with 150,000 plain paper copies.

In addition, the coefficient of static friction, which is a physical property value that indicates a change in wear resistance, had a good value of 1.4 to 1.5 after the durability test.

Note that the static friction coefficient before the durability test was 1.7 to 1.8.

Example 3 A lead free-cutting steel S-L SUM with an outer diameter of 30 mm was used as a zero-lug member.

It was processed into a length of 230 mm and used as an object to be painted. This roller part was treated with a commonly known alkaline degreaser for 6 hours.
After degreasing at 0°C for 5 minutes, and then thoroughly rinsing with water, an iron phosphate conversion coating was applied to a thickness of 3 μm, and after thoroughly rinsing with pure water, draining and drying were performed to prepare test pieces. .

Acrylic/melamine resin (product name: Honeybright C,
-IL, manufactured by Honey Kasei Co., Ltd. Electroless nickel plating on the alumina surface with an average particle size of 1 μm for >100 parts by weight.
3 parts by weight of 1 μm grain and 0.3 μm average particle size
4 parts by weight of Ti powder and 3 parts by weight of nickel-plated metallized mica powder with a thickness of 0.1 μm were dispersed on the surface of mica powder with an average length of 2.0 μm and an average thickness of 0.2 μm using a ball mill for 30 hours. After that, it was diluted to 15% by weight with demineralized water to prepare a coating liquid.

Using this coating liquid, electrodeposition was carried out for 3 minutes at a bath temperature of 25°C and pH of 8 to 9, using the object to be coated as an anode and a 0.5t stainless steel plate as a counter electrode at an applied voltage of 1.00 to 150V. did.

After electrodeposition, wash with water and heat in an oven at 120°C ± 1°C for 5 days.
It was cured for 0 minutes and completed. The thickness of the formed electrodeposited film is 12 to 13 μm, and the amount of eutectoid in the coating is 25 to 13 μm.
It was 29% by weight.

When we tested the abrasion resistance of the electrocoated film that had been formed, we found that the coefficient of static friction of the roller was 1.4 to 1.5, which was a good result even after a durability test on 150,000 sheets of plain paper for copying. It was done. The coefficient of static friction before the durability test was 1.7.
It was ~1.8.

Example 4 Aluminum 53S was used as a 0-lance member with an outer diameter of 30 mm.
.

It was processed into a length of 230 mm and used as an object to be painted. An alumite coating is applied to this aluminum roller by anodizing.
It was applied to a thickness of μm and used as a test piece.

Acrylic/melamine resin (product name:) x Nibrite C
-IL, produced by Honey Kasei Co., Ltd.) Electroless copper plating of 0.1 μm on the alumina surface with an average particle size of 1 μm per 100 parts by weight
and 4 parts by weight of Co with an average particle size of 0.3 μm.
9 parts by weight, average length 2.5μm, average thickness 0.15μ
Mix 3 parts by weight of nickel-plated metallized mica powder with a thickness of 0.1 μm on the mica powder surface, disperse it in a ball mill for 30 hours, dilute to 15% by weight with demineralized water, and mix it with the coating liquid. did.

Using this coating liquid, electrodeposition was carried out for 3 minutes at a bath temperature of 25 DEG C. and a pH of 8 to 9, using the object to be coated as an anode and a 0.5 t stainless steel plate as a counter electrode at an applied voltage of 100 to 150 V.

After electrodeposition, it was washed with water and cured in an oven at 120°C±1°C for 50 minutes to complete the process. The thickness of the formed electrodeposited film is 1
0 to 12 μm, and the amount of eutectoid in the coating is 33 to 37
% by weight.

When we tested the abrasion resistance of this electrocoated film, we found that the coefficient of static friction of the roller was 1.4 to 1.6, which was a good result even after a durability test on 150,000 sheets of plain paper for copying. It was done. The coefficient of static friction before the durability test was 1.6.
It was ~1.7.

Example 5 5pcc-D material (t=0.5mm steel plate) as the object to be coated
We used a transfer guide and a fixing entrance guide that had been processed by. In addition, pretreatment before electrodeposition coating was performed in the same manner as in Example 3.

Acrylic/melamine resin (product name: Honeybright C-
IL, manufactured by Honey Kasei Co., Ltd.) Electroless nickel plating on the alumina surface with an average particle size of 1 μm per 100 parts by weight.
3 parts by weight of 1 μm grain and 0.3 μm average particle size
4 parts by weight of silver powder and average major diameter 2.5 μm 1 average thickness 0
．． 2 parts by weight of 0.1 μm thick nickel-plated metallized mica powder was added to the surface of 1 μm mica powder, dispersed in a ball mill for 30 hours, and then diluted to 15% by weight with demineralized water to form a coating liquid. .

Using this coating liquid, electrodeposition was carried out for 3 minutes at a bath temperature of 25 DEG C. and a pH of 8 to 9, using the object to be coated as an anode and a 0.5 t stainless steel plate as a counter electrode at an applied voltage of 100 to 150 V.

After electrodeposition, it was washed with water and cured in an oven at 120°C±1°C for 50 minutes to complete the process. The thickness of the formed electrodeposited film is 1
1-13 μm, and the amount of eutectoid in the coating film is 24-28
% by weight.

The transfer guide and fixing entrance guide having the electrocoated film formed in this way have a volume resistivity of 1
It has a value of 07 to 10' (Ω・cm), and even if it is installed in a copying machine and copied 10,000 times in a low humidity (25% RH) environment, it will not stain the paper due to toner adhesion. ,
Further, even in a high humidity (85% RH) environment, no malfunctions such as image omission occurred, and good performance as a paper passing member was obtained.

This performance did not change during a durability test with 150,000 plain paper copies.

In addition, good results were obtained for the coefficient of static friction, which is a physical property value that indicates changes in wear resistance, of 1.3 to 1.4 after the durability test. The coefficient of static friction before the durability test was 1.6 to 1.
．． It was 7.

〔Effect of the invention〕

As explained above, according to the present invention, ultrafine metal powder and metallized ceramic powder are coated on the base material without being affected by the wear resistance of the base material itself of the paper passing/conveying member. By forming an electrodeposited coating film composited with mica powder, we provide paper passing and conveying members that have a uniform surface condition, excellent wear resistance, and can be easily controlled to any specific volume resistivity. can do.

Further, the process of manufacturing the paper passing/conveying member of the present invention is significantly simplified, and can greatly contribute to economical effects.

[Brief explanation of drawings]

Figures 1 (a) to (C) are partial cross-sectional views showing an example of the structure of the paper passing/conveying member of the present invention, and Figure 2 is a flat plate coated with an electrodeposition coating and a plastic coated with aluminum flakes. Figure 3 is a schematic diagram of a surface property tester used to measure the abrasion resistance of paper passing and conveying members, and Figure 4 is a transfer guide in a copying machine. FIG. 1... Electrodeposition coating film 2... Metal plating layer 3... Contact treatment layer 4... Non-metallic member 5... Oxide coating layer 6.8... Metal member 7... Chemical conversion coating Layer 9... Photoreceptor (drum) lO... Toner 11... Transfer material (copy paper) 12... Constant voltage element (varistor) I3... Transfer charging machine 14... Transfer guide 15. ...Sensor 16...Roller member 17...Recorder 1B...Copy paper fixing plate 19...Copy paper East 2 figure

Claims (3)

[Claims] (1) Ultrafine metal powder with an average particle size of 0.01 to 3.0 μm, ceramic powder with an average particle size of 0.1 to 3.0 μm, metal-plated powder and natural mica powder on the base material A paper passing and conveying member characterized by forming an electrodeposited film containing metal-plated powder on the body surface. (2) The paper passing and conveying member according to claim 1, wherein the base material is a metal member or a non-metal member. (3) The paper passing and conveying member according to claim 1, wherein the electrodeposited coating has a thickness of 5 μm or more.