JPH06332211A - Transfer material carrying member and image forming device having the same - Google Patents

Abstract

PURPOSE:To provide the transfer material carrying member having excellent surface mechanical strength, elasticity, wear resistance and oil resistance and the image forming device. CONSTITUTION:This transfer material carrying member contains the polymer expressed by formula (where R1 to R16 denote hydrogen atoms, halogen atoms, alkyl groups or aryl groups; A denotes a bivalent group; W and X denote copolymn. ratios). The transfer material carrying member contains this polymer and conductive carbon black. This image forming device has these transfer material carrying members. As a result, the transfer material carrying member having the excellent surface mechanical strength, elasticity, wear resistance and oil resistance and the image forming device with which good transfer is always executed in spite of repetitive use and always stable and good images obtainable are obtd.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer material carrying member and an image forming apparatus, and more particularly to transferring a toner image on an image carrying body formed by an electrophotographic system or an electrostatic recording system onto a transfer material. The present invention relates to a transfer material carrying member and an image forming apparatus having the transfer material carrying member. Such image forming apparatuses include black and white, mono-color or full-color electrophotographic copying machines, printers,
There are various other recording devices.

[0002]

2. Description of the Related Art Conventionally, there are various types of transfer material carrying members used for transferring an image on an image carrier to a transfer material. For example, charging-image exposure-toner development-
In an electrophotographic apparatus having an image forming means such as transfer-cleaning, a transfer drum and a transfer device as shown in FIGS. 1 and 2 are examples of means for transferring a toner image on a photoconductor to a transfer material (for example, paper). To be

The transfer drum 10 has a support body composed of cylinders 12 and 13 arranged at both ends and a connecting portion 14 connecting these cylinders. The material carrying member 11 is stretched. Further, the connecting portion 14 has a transfer material gripper 15 for gripping the transfer material fed from the paper feeding device. Further, a transfer discharger 21, and an inner charge removal discharger 23 and outer charge removal dischargers 22 and 24, which constitute charge removal means, are arranged inside and outside the transfer drum 10.

During the transfer process, various mechanical or electrical external forces such as transfer material transfer, transfer charging, charge removal and cleaning are applied to the transfer material carrying member 11,
It is required to have various characteristics such as durability against these external forces, that is, mechanical strength, abrasion resistance and electrical durability, and excellent lubricity for cleaning members.

In particular, in recent years, in order to realize a higher quality image, the latent image is made fine and the reproducibility of the latent image is improved. As a developer, the particle size is 10 μm or less and the average particle size is 8 μm.
So-called small particle size toner particles of about m have come to be used. Therefore, it is necessary to further tighten the conditions for cleaning the toner on the transfer material carrying member.

Conventionally, resin films of Teflon, polyester, polyvinylidene fluoride, triacetate, polycarbonate, etc. have been used as the transfer material carrying member, but moreover, excellent mechanical strength, abrasion resistance and electrical durability. Also, a transfer material carrying member having oil resistance is desired.

When these resin films are used as a transfer material carrying member, peeling discharge occurs when the transfer material is peeled off from the photosensitive drum immediately after transfer, and the transfer material is charged due to this peeling discharge. This charged electric charge cannot escape and is held by the transfer material and the transfer material carrying member, so that the toner image on the transfer material may be disturbed or the next transfer charging may not be performed uniformly. In such a case, it is necessary to strictly control the transfer current value, or to strictly set the transfer condition such that the residual charge on the transfer material carrying member is erased by reverse charging or AC charging.

In order to improve such a defect, Japanese Patent Laid-Open No. Sho 6-96
As disclosed in Japanese Unexamined Patent Publication No. 0-10625, a method has been attempted in which carbon black is dispersed in a resin used for a transfer material carrying member to arbitrarily control the volume resistance of the resin film. However, it is very difficult to uniformly disperse carbon in the resin, it is difficult to control the resistance to a target resistance value, and there is a problem in productivity.

Further, the transfer material carrying member is cracked on the surface of the film due to the adhesion of mechanical oil used in the electrophotographic apparatus. When an image is produced, therefore, a crack-like image defect or transfer unevenness due to defective transfer occurs. However, there is a problem in that transfer omission occurs.

[0010]

SUMMARY OF THE INVENTION An object of the present invention is to provide a transfer material carrying member which is excellent in the above-mentioned characteristics and can always obtain a good image, and an image forming apparatus having the transfer material carrying member. .

[0011]

Means for Solving the Problems That is, the present invention provides the following general formula (1):

[0012]

[Chemical 3]

(Wherein R ₁ to R ₁₆ are hydrogen atoms, halogen atoms, alkyl groups or aryl groups, A is a divalent group, and W and X are copolymerization ratios). It is a transfer material carrying member characterized by containing.

The present invention also relates to the following general formula (1)

[0015]

[Chemical 4]

(Wherein R ₁ to R ₁₆ are hydrogen atoms, halogen atoms, alkyl groups or aryl groups, A is a divalent group, and W and X are copolymerization ratios),
And a conductive carbon black.

The present invention is also an image forming apparatus including the above-mentioned transfer material carrying member.

The general formula (1) contained in the above copolymer
The polymer represented by is a polycarbonate resin with suitable flexibility, and does not prevent free rotation of the phenol group, and imparts flexibility by introducing a group that is not bulky, and has resistance to cracking against machine oils and the like. Used for the purpose of improving. The copolymer composition ratio of W: X is 5:95.
To 80:20, and its molecular weight can range from 10,000 to 100,000.

Such a polymer is synthesized by using an interfacial polycondensation method without producing a homopolymer as a by-product. Specific examples of various monomers that give the above-mentioned copolymer include the following diphenol compounds.

[0020]

[Chemical 5]

[0021]

[Chemical 6]

[0022]

[Chemical 7]

[0023]

[Chemical 8]

[0024]

[Chemical 9]

If desired, the transfer material-carrying member of the present invention can be blended with various known additives in a conventional polycarbonate resin. For example, phosphorous acid or phosphite can be used as a stabilizer. It is suitable. Examples of the releasing agent include saturated fatty acid monomers or polyhydric alcohol esters, and stearyl stearate, behenyl behenate, pentaerythritol tetrastearate, dipentaerythritol hexaoctoate and the like are exemplified as preferable examples. .

It is also possible to add an antioxidant, a flame retardant and a lubricant.

Further, the copolymer of the present invention can be copolymerized with a monomer component other than the constitutional unit represented by the general formula (1).

In the transfer material carrying member of the present invention, the above copolymer can be molded into a resin film by a method such as extrusion molding or injection molding. The resin film may be in the form of a sheet, or may be in the form of an endless belt by adhering the end portions of the sheet by means of heat fusion, ultrasonic fusion, adhesive or the like. Is good. The film thickness of the resin film is preferably 50 μm to 300 μm, and particularly preferably 70 μm to 200 μm.

Since the resin film used in the present invention is excellent in electrical durability, mechanical strength, elasticity and durability, and is also excellent in oil resistance, it can be used for various purposes such as transfer material transfer, transfer charging, charge elimination and cleaning. When it is used as a transfer material carrying member that receives an external force, it can withstand repeated use, does not cause cleaning defects, and can always obtain a stable and good image. In particular, even when a so-called small particle size toner is used as the developing method, the transfer material carrying member of the present invention has extremely excellent electrical and mechanical characteristics, so that a good image can be stably obtained.

Next, the case where the transfer material carrying member of the present invention further contains conductive carbon black will be described.

Examples of the conductive carbon black include super conductive furnace black, conductive furnace black, extra conductive furnace black, superablation furnace black and fibril carbon.
The amount of conductive carbon black added is 0.1 to 30 parts by weight based on 100 parts by weight of the transfer material carrying member of the present invention.
The method of blending the conductive carbon black can be a method known per se, for example, simply blending the copolycarbonate powder and the conductive carbon black. The melt-kneading can be batch or continuous.

The copolymer used in the present invention does not impair the film strength even when carbon black is dispersed,
High mechanical strength. Therefore, it is possible to control the volume resistance value to a target by arbitrarily changing the amount of carbon.

Further, since the transfer material carrying member of the present invention is excellent in crack resistance against mechanical oil and has excellent elasticity even when carbon is dispersed therein, the transfer material carrying member of the present invention can be sufficiently used even after being repeatedly used in an image forming apparatus. It can be effective.

Further, the transfer material carrying member of the present invention not only obtains a good image, but is also very excellent in production stability.

The conductive carbon-dispersed resin film used in the present invention can be molded by a method such as extrusion molding or injection molding. The volume resistivity of such a resin film is preferably 1 × 10 ² [Ω · cm] to 1 × 10 ¹⁷ [Ω · cm], and the relative dielectric constant is preferably 2.5 or more.
The shape may be a sheet shape, or the end portion of the sheet may be formed into an endless belly shape by means of heat fusion, ultrasonic fusion, adhesion with an adhesive, or the like, and an arbitrary most preferable shape may be obtained depending on the image forming apparatus used. The film thickness varies depending on volume resistance and relative permittivity, but is 50 μm to 300
μm, particularly 70 μm to 200 μm is preferable.

Specific examples of aspects of the image forming apparatus having the transfer agent carrying member of the present invention are shown in FIGS. The image forming apparatus shown in FIGS. 3 and 4 is an example of a multicolor (full color) image forming apparatus.

First, a brief description will be given with reference to FIG. Figure 3
In the multicolor electrophotographic copying machine shown in FIG. 1, an image carrier, which is rotatably supported and rotatable in the direction of arrow a, that is, a photosensitive drum 33 is arranged, and an image forming means is arranged on the outer peripheral portion thereof. The image forming unit may be any unit, but in this example, the primary charger 34 that uniformly charges the photosensitive drum 33.
On the photosensitive drum 33, and an exposure means 32 including, for example, a laser beam exposure device for forming an electrostatic latent image on the photosensitive drum 33 by irradiating a color-separated optical image or an optical image corresponding thereto. And a rotary developing device 31 for converting the electrostatic latent image into a visible image.

The rotary developing device 31 includes four developing devices 3 for accommodating four color developers of yellow color developer, magenta color developer, cyan color developer and black color developer, respectively.
1Y, 31M, 31C, 31Bk, and a substantially columnar case that holds these four developing devices and is rotatably supported. The rotary developing device 31 conveys a desired developing device to a position facing the outer peripheral surface of the photosensitive drum 33 by the rotation of the housing, develops the electrostatic latent image on the photosensitive drum, and performs full-color development for four colors. Is configured to be possible.

A visible image on the photosensitive drum 33, that is,
The toner image is transferred to the transfer material P that is carried and conveyed by the transfer device 10. In this example, the transfer device 10 is a transfer drum that is rotatably supported.

The process of forming a full-color image by the multicolor electrophotographic copying apparatus having the above-mentioned structure will be briefly described below.

After the photosensitive drum 33 is uniformly charged by the primary charger 34, the exposure means 32 irradiates the optical image E according to the image information to form an electrostatic latent image on the photosensitive drum 33. The electrostatic latent image is visualized as a toner image by the rotary developing device 31 on the photosensitive drum 33 with toner using resin as a base material.

On the other hand, the transfer material P is sent to the transfer drum 10 by the registration rollers 36 in synchronism with the image, the tip of the transfer material P is gripped by the gripper 15 and the like, and is conveyed in the direction of arrow b in the figure.

Next, on the photosensitive drum 33, the transfer discharger 21 receives a corona discharge having a polarity opposite to that of the toner from the back surface of the transfer material carrying member 11 of the present invention which is included in the transfer drum 10 in the area in contact with the photosensitive drum 33. Toner image is transferred to the transfer material P.

The transfer material P is peeled off from the transfer drum 10 by the action of the separating claw 28 while being discharged by the discharging discharging devices 22, 23 and 24 after the necessary number of transfer steps are performed, and is fixed by the conveying belt 38. After being fixed by heat at 39, it is discharged to the outside of the machine.

On the other hand, the photosensitive drum 33 is subjected to the image forming process again after the residual toner on the surface is cleaned by the cleaning device 37.

Further, the transfer material carrying member 1 of the transfer drum 10
Similarly, the cleaning device 35a and the cleaning assisting means 35 having a blade or a fur brush on the first surface
After being cleaned by the action of b, it is again subjected to the image forming process.

In the present invention, as shown in FIG. 2, an insulating member 26 such as a polycarbonate resin plate is provided on the shield plate downstream of the transfer corona discharger 21 in the rotating direction of the transfer drum 10 (direction of arrow b). It is preferable to provide the transfer corona with a large amount of transfer corona toward the photosensitive drum 33.

Further, in the present invention, the transfer material carrying member 11
An elastic pressing member 27 may be provided that extends from the introduction side to the downstream side in the moving direction. The pressing member 27 is made of, for example, a synthetic resin film of polyethylene, polypropylene, polyester, polyethylene terephthalate or the like, preferably having a volume resistivity of 10 ¹⁰ Ω · cm or more, particularly preferably 10 ¹⁴ Ω · cm or more. However, it is arranged over the entire area of the transfer portion.

Further, the pressing member 27 presses the transfer material carrying member 11 by its own elastic force, and the transfer material P has finished contacting the photosensitive drum 33 at the front end portion of the transfer material carrying member 11 side. It is preferable to set the position or the position at which the contact is started, or the position corresponding to the position as close as possible.

FIG. 4 shows a specific example of an image forming apparatus using the transfer material carrying member of the present invention when the shape is an endless belt.

[0051]

EXAMPLES The present invention will be described below with reference to examples. In the examples, “part” means “part by weight”. Example 1 The following structural formula

[0052]

[Chemical 10]

Polymer (viscosity average molecular weight 3.09 × 10
^{Using 4} ), a film sheet having a thickness of 105 μm was obtained by extrusion molding.

Further, the mechanical strength of this resin film was measured by using a tensile tester (SV-55 manufactured by Imada Seisakusho Co., Ltd.). As a result, the tensile strength at break was 602 kg / cm ² .

Further, in order to test the oil resistance of this resin film, Uniway 180 (manufactured by Nippon Oil Co., Ltd.) was applied on the film, left for 1 week, and then the mechanical strength was measured by the above-mentioned tensile test. As a result, the tensile fracture strength is 5
It was 61 kg / cm ² . . A transfer drum as shown in FIGS. 1 and 2 was prepared using this resin film.

That is, as the transfer material carrying member 11, the transfer film 10 was prepared by stretching the resin film between the two aluminum cylinders 12 and 13. Both ends of the transfer material carrying member 11 were fixed on a connecting portion 14 connecting the two aluminum cylinders 12 and 13 constituting the transfer drum 10.

In this embodiment, the transfer drum 10 has a diameter of 160 mm and a moving speed of 160 mm / sec. At the same time, the process speed, which is the moving speed of the photosensitive drum 33 and the like, was also set to 160 mm / sec. The opening width of the transfer corona discharger 21 is 19 mm, and the distance between the discharge wire 25 and the outer peripheral surface of the photosensitive drum 33 is 10.5 m.
The distance between the discharge wire 25 and the bottom surface of the shield plate of the transfer corona discharger 21 was set to 16 mm.

As the pressing member 27, a polyethylene terephthalate resin film was used.

In this embodiment, a latent image is formed on the photosensitive drum 33 charged in the negative polarity by the image forming apparatus as shown in FIG. 3, and the reversal development is performed by using the toner having the average particle diameter of 8 μm. To obtain a toner image. At this time, the toner is composed of a resin as a coloring material and a slight amount of an additive for improving the charge controllability and lubricity, and is triboelectrically charged with carrier particles in the developing device to be negatively charged. It was

Thereafter, the toner image was transferred onto a transfer material by the transfer device having the above-mentioned structure. Next, the transfer material was separated from the transfer drum 10 and fixed by a fixing device.

In this embodiment, the surface of the transfer material carrying member 11 of the transfer drum 10 is provided with a cleaning device 35a having a urethane blade and a cleaning assisting means 35.
Clean with b.

In the multicolor electrophotographic copying machine having the above structure,
An image output durability test was performed on 000 sheets. As a result, the initial image was a good image with no transfer unevenness, and it was possible to obtain the same good image as the initial image even after running.

Example 2 Instead of the polymer used in Example 1, a polymer having the following structural formula

[0064]

[Chemical 11]

A transfer material carrying member was prepared in the same manner as in Example 1 except that (viscosity average molecular weight 3.55 × 10 ⁴ ) was used.
Evaluation was performed in the same manner as in Example 1.

The results are shown in Table 1.

Example 3 Instead of the polymer used in Example 1, a polymer having the following structural formula

[0068]

[Chemical 12]

A transfer material carrying member was prepared in the same manner as in Example 1 except that (viscosity average molecular weight 2.88 × 10 ⁴ ) was used.
Evaluation was performed in the same manner as in Example 1.

The results are shown in Table 1.

Example 4 Instead of the polymer used in Example 1, a polymer having the following structural formula

[0072]

[Chemical 13]

A transfer material carrying member was prepared in the same manner as in Example 1 except that (viscosity average molecular weight 2.89 × 10 ⁴ ) was used.
Evaluation was performed in the same manner as in Example 1.

The results are shown in Table 1.

Comparative Example 1 A transfer material carrying member was prepared in the same manner as in Example 1 except that polycarbonate Z (viscosity average molecular weight 2.88 × 10 ⁴ ) was used in place of the polycarbonate resin used in Example 1. The evaluation was performed in the same manner as in Example 1.

The results are shown in Table 1.

Example 5 Instead of the polymer used in Example 1, a polymer having the following structural formula

[0078]

[Chemical 14]

A transfer material carrying member was prepared in the same manner as in Example 1 except that (viscosity average molecular weight 5.33 × 10 ⁴ ) was used and the film thickness was 130 μm.

The mechanical strength of this resin film was measured in Example 1.
It evaluated similarly to. The results are shown in Table 1.

This resin film was molded into an endless belt by heat fusion, and the image was evaluated using the image forming apparatus shown in FIG. 4 and the toner similar to the toner used in Example 1. A good image without unevenness could be obtained.

Further, with the above electrophotographic copying apparatus, 10000
I ran a test of images. As a result, it was possible to obtain a stable image without unevenness, which was the same as the initial stage, even after the endurance.

Example 6 Instead of the polymer used in Example 5, a polymer having the following structural formula

[0084]

[Chemical 15]

A transfer material carrying member was prepared in the same manner as in Example 5 except that (viscosity average molecular weight 3.51 × 10 ⁴ ) was used.
Evaluation was performed in the same manner as in Example 5.

The results are shown in Table 1.

Example 7 Instead of the polymer used in Example 5, a polymer having the following structural formula

[0088]

[Chemical 16]

A transfer material carrying member was prepared in the same manner as in Example 5 except that (viscosity average molecular weight 3.02 × 10 ⁴ ) was used.
Evaluation was performed in the same manner as in Example 5.

The results are shown in Table 1.

Example 8 Instead of the polymer used in Example 5, a polymer having the following structural formula

[0092]

[Chemical 17]

A transfer material carrying member was prepared in the same manner as in Example 5 except that (viscosity average molecular weight 2.98 × 10 ⁴ ) was used.
Evaluation was performed in the same manner as in Example 5.

The results are shown in Table 1.

Comparative Example 2 Instead of the polycarbonate resin used in Example 5, the following formula was used.

[0096]

[Chemical 18]

A transfer material carrying member was prepared in the same manner as in Example 5 except that the polymer having the structure shown by (weight average molecular weight of 8.2 × 10 ⁴ ) was used, and evaluated in the same manner as in Example 5.

The results are shown in Table 1.

[0099]

[Table 1]

Example 9 The following structural formula

[0101]

[Chemical 19]

Polymer (viscosity average molecular weight 3.11 × 10
⁴ ) 95 parts and 5 parts of Ketjen Black EC (manufactured by Ketjen Black International) having a specific surface area of 800 m ² / g were pelletized using a twin-screw extruder with a vent. The obtained pellets were compression-molded to form a resin film having a thickness of about 25 μm.

The volume resistivity of the obtained resin film is 1.
It was 5 × 10 ¹⁵ [Ω · cm]. In addition, the mechanical strength of this resin film is determined by the tensile strength (Imada Manufacturing SV-
55). As a result, the tensile fracture strength is 60.
It was 3 kg / cm ² . Further, in order to test the oil resistance of this resin film, Uniway 180 was applied on the film.
(Nippon Oil Co., Ltd.) was applied and left for 1 week, and then the mechanical strength was measured by the above-mentioned tensile test. As a result, the tensile fracture strength after the oil resistance test was 565 kg / cm ² .

A transfer drum as shown in FIG. 1 was prepared using the above resin film. That is, as the transfer material carrying member 11 shown in FIG. 1, the transfer drum 1 is made by stretching the resin film between two aluminum cylinders 12 and 13.
0 was created. Both ends of the transfer material carrying member 11 are provided with two aluminum cylinders 12, 1 that constitute the transfer drum 10.
It was fixed on the connecting portion 14 for connecting the three.

In this embodiment, the transfer drum 10 has a diameter of 160 mm and a moving speed of 160 mm / sec. At the same time, the process speed, which is the moving speed of the photosensitive drum 33 and the like, was also set to 160 mm / sec. The opening width of the transfer corona discharger 21 is 19 mm, and the distance between the discharge wire 25 and the outer peripheral surface of the photosensitive drum 33 is 10.5 m.
m, and the distance between the discharge wire 25 and the bottom surface of the shield plate of the transfer corona discharger 21 was set to 16 mm.

As the pressing member 27, a polyethylene terephthalate resin film was used.

In the present embodiment, the present inventors formed a latent image on the photosensitive drum 33 which was charged with a negative polarity by an image forming apparatus as shown in FIG. 3 and used toner having an average particle diameter of 8 μm. A toner image was obtained by reversal development. At this time,
The toner is composed of a resin as a coloring material and a small amount of additives for improving charge controllability and lubricity, and is triboelectrically charged with carrier particles in a developing device to be negatively charged.

Then, the toner image was transferred onto a transfer material by the transfer device having the above-mentioned structure. Next, the transfer material is the transfer drum 1.
It was separated from 0 and fixed by a fixing device.

In this embodiment, the surface of the transfer material carrying member 11 of the transfer drum 10 has a cleaning device 35a having a urethane blade, and a cleaning assisting means 35b.
To clean.

In the multicolor electrophotographic copying machine having the above-mentioned structure,
An image output durability test was performed on 000 sheets. As a result, the initial image was a good image with no transfer unevenness, and it was possible to obtain the same good image as the initial image even after running.

Example 10 Instead of the polymer used in Example 9, a polymer having the following structural formula

[0112]

[Chemical 20]

(Viscosity average molecular weight 2.33 × 10 ⁴ ) was 9
A transfer material carrying member was prepared in the same manner as in Example 9 except that 5 parts were used, and evaluated in the same manner as in Example 9.

The results are shown in Table 2.

Example 11 Instead of the polymer used in Example 9, a polymer having the following structural formula

[0116]

[Chemical 21]

(Viscosity average molecular weight 2.21 × 10 ⁴ ) was 9
A transfer material carrying member was prepared in the same manner as in Example 9 except that 5 parts were used, and evaluated in the same manner as in Example 9.

The results are shown in Table 2.

Example 12 Instead of the polymer used in Example 9, a polymer having the following structural formula

[0120]

[Chemical formula 22]

(Viscosity average molecular weight 2.33 × 10 ⁴ )
A transfer material carrying member was prepared in the same manner as in Example 9 except that 5 parts were used, and evaluated in the same manner as in Example 9.

The results are shown in Table 2.

Comparative Example 3 Instead of the polycarbonate resin used in Example 9, a polycarbonate Z resin (viscosity average molecular weight 2.82 × 1) was used.
0 ⁴ ) was used, a transfer material carrying member was prepared in the same manner as in Example 9, and evaluated in the same manner as in Example 9.

The results are shown in Table 2.

Example 13 Instead of the polymer used in Example 9, a polymer having the following structural formula

[0126]

[Chemical formula 23]

(Viscosity average molecular weight 2.25 × 10 ⁴ ) 9
4 parts, 6 parts by weight of Ketjen black, film thickness 1
A transfer material carrying member was prepared in the same manner as in Example 9 except that the thickness was 10 μm.

The volume resistivity and dispersibility of carbon black of this resin film were evaluated in the same manner as in Example 9.

The results are shown in Table 2.

This resin film was molded into an endless belt by heat fusion, and the image was evaluated using the image forming apparatus shown in FIG. 4 and the same toner as that used in Example 9. A good image without unevenness could be obtained.

Further, with the above electrophotographic copying apparatus, 10000
An image output test was performed. As a result, it was possible to obtain a stable image without unevenness, which was the same as the initial stage, even after the endurance.

Example 14 Instead of the polymer used in Example 13, a polymer having the following structural formula

[0133]

[Chemical formula 24]

(Viscosity average molecular weight 2.88 × 10 ⁴ ) was 9
A transfer material carrying member was prepared in the same manner as in Example 13 except that 4 parts were used, and evaluated in the same manner as in Example 13.

The results are shown in Table 2.

Example 15 A polymer having the following structural formula in place of the polymer used in Example 13

[0137]

[Chemical 25]

(Viscosity average molecular weight 3.08 × 10 ⁴ )
A transfer material carrying member was prepared in the same manner as in Example 13 except that 4 parts were used, and evaluated in the same manner as in Example 13.

The results are shown in Table 2.

Example 16 Instead of the polymer used in Example 13, a polymer having the following structural formula

[0141]

[Chemical formula 26]

(Viscosity average molecular weight 2.85 × 10 ⁴ ) 9
A transfer material carrying member was prepared in the same manner as in Example 13 except that 4 parts were used, and evaluated in the same manner as in Example 13.

The results are shown in Table 2.

Comparative Example 4 Instead of the polycarbonate resin used in Example 13, the following formula was used.

[0145]

[Chemical 27]

A transfer material carrying member was prepared in the same manner as in Example 13 except that a polymer having a structure shown by (weight average molecular weight 3.45 × 10 ⁴ ) was used and evaluated in the same manner as in Example 13. The results are shown in Table 2.

[0147]

[Table 2]

[0148]

As described above, the present invention provides a polymer having a structure represented by the general formula (1), a transfer material carrying member containing the polymer and conductive carbon black, and a transfer material carrying member. The image forming apparatus used. The transfer material carrying member is excellent in surface mechanical strength, elasticity, abrasion resistance and oil resistance, and an image forming apparatus using the transfer material carrying member always performs good transfer even after repeated durability. Therefore, a stable and good image can always be obtained.

[Brief description of drawings]

FIG. 1 is a schematic configuration example of a transfer drum using a transfer material carrying member of the present invention.

FIG. 2 is a schematic configuration example of a transfer device using the transfer material carrying member of the present invention.

FIG. 3 is a schematic configuration example of an image forming apparatus using a sheet-shaped transfer material carrying member of the present invention.

FIG. 4 is a schematic configuration example of an image forming apparatus using the transfer material carrier of the present invention.

Claims (6)

[Claims] 1. The following general formula (1): (Wherein R ₁ to R ₁₆ are a hydrogen atom, a halogen atom, an alkyl group or an aryl group, A is a divalent group, and W and X are copolymerization ratios). And a transfer material carrying member. 2. An image forming apparatus comprising the transfer material carrying member according to claim 1. 3. The following general formula (1): (Wherein R ₁ to R ₁₆ are a hydrogen atom, a halogen atom, an alkyl group or an aryl group, A is a divalent group, and W and X are copolymerization ratios), and a conductive material. A transfer material carrying member comprising carbon black. 4. The content of the conductive carbon black is 0.1 to 30 with respect to 100 parts by weight of the transfer material carrying member.
The transfer material carrying member according to claim 3, which is parts by weight. 5. An image forming apparatus comprising the transfer material carrying member according to claim 3. 6. An image forming apparatus comprising the transfer material carrying member according to claim 4.