JP2003122138A - Intermediate transfer body, manufacturing method of intermediate transfer body, and image forming device using the intermediate transfer body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intermediate transfer body excellent in the separability of recording media and preventing a failure such as an image defect. SOLUTION: The surface of a valcanized core bar 31 is roughened, and a base material rubber 32 is molded on the rough surface of the core bar 31. The surface of the rubber 32 is ground to be a ground surface 32a, and the rubber 32 is released from the core bar 31 so as to form a coating layer 33 on a surface (base material rough surface) 32b opposed to the surface 32a and obtain an intermediate transfer member (high resistance belt) 34. Then, the member 34 is attached to a supporting member (for example, a supporting member obtained by forming a conductive elastic layer on a conductive cylinder) by the use of the ground surface, so that the intermediate transfer body is obtained. For example, the surface of the core bar 31 is made the rough surface whose ten-point average roughness is 15 to 30 μm and whose pitch average value is 50 to 150 μm, and the thickness of the layer 33 is made smaller than the ten-point average roughness of the rubber 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used when a toner image formed on an image carrier is transferred as a primary transfer image and the primary transfer image is secondarily transferred to a recording medium conveyed to a transfer nip portion. The present invention relates to an intermediate transfer member, a manufacturing method for manufacturing the intermediate transfer member, and an image forming apparatus using the intermediate transfer member.

[0002]

2. Description of the Related Art Generally, an electrophotographic image forming apparatus (image forming apparatus) for forming a color image by using a so-called intermediate transfer member when forming a color image by using an electrophotographic process.
A belt-shaped intermediate transfer member (hereinafter referred to as an intermediate transfer belt) or a drum-shaped intermediate transfer member (hereinafter referred to as an intermediate transfer drum) is used as the intermediate transfer member. An image forming apparatus using an intermediate transfer belt as an intermediate transfer member has a freedom in layout of each device / part when designing an image forming apparatus, and has an advantage that a compact image forming apparatus can be realized. Color misregistration is liable to occur, and belt drive control is difficult (timing control is difficult).

On the other hand, an image forming apparatus using an intermediate transfer drum as an intermediate transfer body has an advantage that color misregistration is small, but at the time of secondary transfer, a recording medium (for example, paper) is separated from the intermediate transfer drum. It has the disadvantage of being difficult to do.

When an intermediate transfer drum is used as the intermediate transfer member, the surface roughness of the intermediate transfer drum is controlled to reduce the electrostatic force acting on the paper in order to improve the separability of the paper. It has been attempted to improve the separability.

By the way, as a method for roughening the surface of the intermediate transfer member, for example, those described in JP-A-11-30914 (Prior Art 1) and JP-A 2000-206798 (Prior Art 2) are known. ing.

In Conventional Example 1, the surface roughness of the intermediate transfer member is
Controls according to the coating conditions of the coating layer (coating layer) to prevent the surface of the coating layer from becoming rough and to prevent the localization of highly lubricating powders, thus maintaining the transfer uniformity. I am trying.

Further, in Conventional Example 2, the surface of the intermediate transfer member is roughened with a filler, and, for example, the particle size and the dispersion condition of the binder resin are defined in advance in all or in the vicinity of the surface of the intermediate transfer member. Disperse the filler,
The projections are scattered on the image bearing surface (that is, the surface of the intermediate transfer member). As a result, in Conventional Example 2, poor cleaning, image defects, and blade flipping are avoided.

[0008]

As described above, in Conventional Example 1, although it is described that the surface roughness of the coating layer of the intermediate transfer member is controlled, the uniformity of the coating layer can be accurately measured. It is difficult to control, and when mass-producing the intermediate transfer body, the surface roughness of the intermediate transfer body is inevitably varied, and as a result, the sheet separability is different for each intermediate transfer body. is there. Further, in Conventional Example 1, since the surface roughness of the intermediate transfer member is regulated by the coating layer, the coating layer is likely to wear as the number of printed sheets increases, and as a result, the predetermined surface roughness changes. It's easy to do. Therefore, as the number of printed sheets increases, there is a problem that the paper separability sharply decreases.

On the other hand, in Conventional Example 2, although it is described that the projections are scattered on the image bearing surface of the intermediate transfer member to control the surface roughness, it is attempted to improve the sheet separation property.
Inevitably, it is necessary to increase the particle size of the filler. Considering that the particle size of the filler defines the protrusion, that is, the surface roughness, when the particle size of the filler becomes large, not only the image defects are more likely to occur, but also the filler falls off from the image bearing surface. Easier to do. In addition, there is a problem that the filler or the like is agglomerated during coating and the nozzles are clogged.

An object of the present invention is to provide an intermediate transfer member which has good separability of a recording medium such as paper and can prevent defects such as image defects, a method for manufacturing the intermediate transfer member, and an image forming apparatus using the same. To provide.

[0011]

According to the present invention, the toner image formed on the image carrier is transferred as a primary transfer image, and the primary transfer image is further transferred to the recording medium conveyed to the transfer nip portion. In an intermediate transfer member used for secondary transfer, a support member and a base material rough surface formed on the basis of the rough surface of the mold, which is a rough surface of the mold, are provided on the support member. An intermediate transfer member is obtained, which has an elastic base material mounted with the rough surface of the material as a surface and a coat layer formed on the rough surface of the base material.

By using this intermediate transfer member, the separability of the recording medium is good, and defects such as image defects can be prevented.

Further, according to the present invention, the toner image formed on the image carrier is transferred as a primary transfer image, and the primary transfer image is secondarily transferred to the recording medium conveyed to the transfer nip portion. In the manufacturing method for manufacturing an intermediate transfer member used at that time, a first step of roughening a surface of a mold to form a rough surface of the mold, and the base elastic body on the rough surface of the mold. A second step of molding, a third step of polishing the surface of the base elastic body to form a polishing surface, and a rough surface of the base material that releases the base elastic body and faces the polishing surface. And a fourth step of forming the coating layer on the supporting member with the polishing surface to form the intermediate transfer member, and a fourth step of forming the coating layer on the supporting member. A method for producing an intermediate transfer member is obtained.

When the intermediate transfer member is formed in this manner, the separability of the recording medium is good, and defects such as image defects can be prevented.

For example, in the second step, the elastic material of the base material is vulcanized and molded, and the supporting member has a conductive support and a conductive elastic layer formed on the conductive support. is doing.

In this way, the elastic base material is vulcanized and molded,
If the support member includes a conductive support and a conductive elastic layer formed on the conductive support, durability can be improved.

Furthermore, the mold is, for example, a drum-shaped core metal, and in the fourth step, the base elastic body is inverted so that the polishing surface becomes an inner peripheral surface, and the support is provided. The member has a drum shape.

As described above, using the mold as a drum-shaped core metal, the base elastic body is inverted so that the polishing surface of the base elastic body becomes the inner peripheral surface, and the polishing surface serves as a drum-shaped support member. If it is mounted, the tension distribution of the intermediate transfer member becomes uniform, the cylindrical degree of the intermediate transfer drum, which is an intermediate transfer member, is kept good, and uneven transfer does not occur.

In the first step, the surface of the mold is roughened to have a ten-point average roughness of 15 to 30 μm and a pitch average value of 50 to 150 μm. In the fourth step, The thickness of the coat layer is made thinner than the ten-point average roughness of the elastic substrate.

As described above, since the thickness of the coating layer is made thinner than the ten-point average roughness of the elastic material for the base material, the surface roughness of the elastic material for the base material is not impaired even after coating, and it is effective. The recording medium can be separated from the intermediate transfer member. If the ten-point average roughness is 15 to 30 μm and the pitch average value is 50 to 150 μm on the surface of the mold, image defects can be prevented and the separability of the recording medium can be improved.

Further, according to the present invention, the intermediate transfer member manufactured by the above-described manufacturing method is provided, and the toner image formed on the image carrier is transferred to the intermediate transfer member as a primary transfer image to transfer the toner image. An image forming apparatus is obtained in which the primary transfer image is secondarily transferred onto the recording medium conveyed to the nip portion.

When the above-mentioned intermediate transfer member is used, not only the separability of the recording medium is improved at the time of image formation, but also defects such as image defects can be prevented.

[0023]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described below with reference to the drawings. Incidentally, the dimensions of the components in the illustrated example,
Unless otherwise specified, the material, the shape, the relative arrangement, etc., are not intended to limit the scope of the present invention thereto, but are merely illustrative examples.

The illustrated image forming apparatus includes a photosensitive drum (for example, a-Si photosensitive drum) 11 used as an image bearing member, and the first to fourth developing devices are provided around the photosensitive drum 11. Devices (for example, cyan (C) developing device, magenta (M) developing device, yellow (Y) developing device, black (K) developing device) 12 to 15 are arranged, and a charging device (for example, scorotron charging device) 16, an exposure device (laser optical system: not shown), a cleaning unit 17,
And a static elimination lamp (not shown) are arranged. Further, an intermediate transfer drum 18 is arranged in contact with the photosensitive drum 11, and the intermediate transfer drum 18 is in a sheet shape or a seamless shape directly or through a conductive elastic body on a cylindrical conductive support. A belt (intermediate transfer member) is wound (installed), and this belt has a structure described later.

A secondary transfer roller 19 is arranged in contact with the intermediate transfer drum 18, and a cleaner 20, a separator 21 and the like are arranged around the intermediate transfer drum 18.
As will be described later, the toner image (primary transfer image) primarily transferred from the photosensitive drum 11 to the intermediate transfer drum 18 is secondarily transferred to a recording medium (recording paper), and transferred to the recording paper (secondary image). The transferred image) is fixed on the recording sheet by the fixing unit 22.

By the way, the diameter of the intermediate transfer drum 18 is
For example, φ is 70 to 200 mm, its volume resistivity is set to 10 ⁸ Ω · cm to 10 ¹² Ω · cm, and its thickness is set to 0.1 to 5.0 mm. The secondary transfer roller 19 has a diameter of 20 to 30 mm, a volume resistivity of 10 ⁶ Ω · cm to 10 ⁸ Ω · cm, and a thickness of 4 to 10 mm. Further, the separator 21 is, for example,
AC corona discharger (applied voltage: DC + 100V to 750
V, AC12Vpp (frequency: 1 kHz).

When forming an image, first, the charger 16
To charge the surface of the photoconductor 11 and expose the surface of the photoconductor drum 11 with an exposure device according to the first color component image data (for example, C component image data) (shown by a solid arrow), A first electrostatic latent image is formed on the photosensitive drum 11. Next, the first developing device (C
The developing device 12 develops the first electrostatic latent image to form a first toner image (C toner image) on the photosensitive drum 11. Then, the first toner image is transferred from the photosensitive drum 11 to the intermediate transfer drum 18. The surface of the photoconductor drum 11 is cleaned by the cleaning unit 17 and then discharged by a discharging lamp (not shown).

Thereafter, the surface of the photoconductor 11 is charged by the charger 16, and the surface of the photoconductor drum 11 is exposed by the exposure device according to the second color component image data (for example, M component image data). A second electrostatic latent image is formed on the photosensitive drum 11. Then, the second electrostatic latent image is developed by the second developing device (M developing device) 13 corresponding to the second electrostatic latent image to form the second toner image (M toner image) on the photosensitive drum 11. Form on top. This second toner image is transferred from the photosensitive drum 11 to the intermediate transfer drum 18. After that, the surface of the photosensitive drum 11 is cleaned by the cleaning unit 17 and then discharged by the discharging lamp.

In the same manner, the third and fourth toner images are sequentially transferred to the intermediate transfer drum 18 based on the third and fourth color component image data (for example, Y and K component image data). As a result, on the intermediate transfer drum 18,
Toner images of four component colors, that is, a C toner image, an M toner image, a Y toner image, and a K toner image are sequentially layered and transferred in a state of being aligned (registered) with each other to correspond to target color image data. Color toner image (primary transfer image) is formed.

After the fourth toner image is transferred to the intermediate transfer drum 18, the recording paper is sent to the transfer nip portion by the registration roller 23 at a predetermined timing, and the secondary transfer roller 19 transfers the recording paper to the intermediate transfer drum. The primary transfer image on 18 is transferred as a secondary transfer image.

At this time, the recording paper is charged with an electric charge having a polarity opposite to that of the toner. The recording sheet is the intermediate transfer drum 1.
8 and the secondary transfer roller 19 and then the separator 2
By 1, the charge is removed and the charge is separated from the intermediate transfer drum 18 (at the time of separating the recording paper, that is, when the electric charge of the recording paper is gradually reduced, a shift voltage having the same polarity as the toner is superimposed. AC corona discharge is performed). Then, the recording sheet is sent to the fixing unit 22 by the conveyor belt 24, and the secondary transfer image is fixed on the recording sheet by the fixing unit 22 to obtain a color image.

In the illustrated example, the diameter of the photosensitive drum 11 is φ80 mm, and the diameter of the intermediate transfer drum 18 is φ15.
A 0 mm conductive cylinder is used as a support, and a 600 μm-thick high resistance belt (intermediate transfer member) is coated on this support via a conductive elastic layer having a thickness of 5 mm, and the diameter φ of the intermediate transfer drum 18 is It is set to 160 mm (here, the conductive cylinder and the conductive elastic layer are referred to as an elastic drum (support member)). The high resistance belt has a diameter of 151.5 mm and has elasticity. That is, the high resistance belt has a free outer diameter of φ151.5 mm. As described above, since the elastic drum is covered with the elastic high resistance belt, at a position where the tension of the elastic high resistance belt and the compression force of the elastic drum are balanced,
The outer diameter of the intermediate transfer drum 18 is determined.

Now, with reference to FIG. 2, the production of the stretchable high resistance belt will be described.

When manufacturing a high resistance belt, a drum-shaped vulcanized core metal (mold) 31 is prepared. This vulcanized core metal 31
Surface (peripheral surface) is roughened by, for example, blasting. For example, the vulcanized cored bar 31 has a ten-point average roughness Rz of 15 to 30 μm and its pitch average value (average of peaks and peaks). Blasting is performed so that the distance) Sm becomes 50 to 150 μm (see FIG. 2A). That is, the vulcanized core metal 31 has Rz = 15 to 30 μm and Sm = 50 to 150.
It has a rough surface 31a of μm.

Thereafter, the base rubber (base elastic body) 32 is vulcanized and molded on the rough surface 31a of the vulcanized core metal 31 (see FIG. 2B), and the surface (outer side surface) of the base rubber 32. Was polished to form the surface as a polished surface 32a (FIG. 2 (c)). Then, after releasing the base rubber 32 from the vulcanized core metal 31, the polishing surface 32a
And the inner peripheral surface are reversed, and the inner peripheral surface (base material rough surface 32b) to which the concavo-convex surface (rough surface 31a) of the vulcanized core metal 31 is transferred is used as the outer peripheral surface. That is, the polishing surface 32a of the base rubber 32 is turned upside down, and the inner peripheral surface (concavo-convex surface: rough surface 32b of the base material) to which the concavo-convex surface of the vulcanized core metal 31 is transferred is used as the outer peripheral surface (FIG. (See (d)). Next, a coating material containing highly lubricious particles is applied on the uneven surface (base rough surface) 32b to give a thickness of 10 to 1
A release layer (coat layer) 33 having a thickness of 5 μm was formed to form a drum-shaped high resistance belt (intermediate transfer member) 34 (see FIG. 2).
(E)). When forming the coat layer 33, the coat layer 3
The thickness of 3 is made smaller than the ten-point average roughness Rz of the base rubber 32.

Further, the high resistance belt 34 is fitted (mounted) on the above-mentioned elastic drum to form an intermediate transfer drum. That is, the high-resistance belt 34 is fitted into the elastic drum so that the above-mentioned polishing surface comes into contact with the outer peripheral surface of the elastic drum to form an intermediate transfer drum. by this,
The uneven surface (rough surface) of the high resistance belt 34 serves as the outer peripheral surface of the intermediate transfer drum.

When the base material belt (base material rubber) 32 is vulcanized and molded using the vulcanized core metal 31 as described above, the base material belt 32 has substantially the same level of Rz and S as the vulcanized core metal 31.
will have m. Furthermore, since the surface of the base material belt 32 that is abraded and abutted (adhered) to the elastic drum is a polished surface, the tension distribution of the high resistance belt 34 becomes uniform. As a result, the cylindrical degree of the intermediate transfer drum is kept good, and transfer unevenness does not occur.

Further, since the thickness of the coating layer 33 is smaller than the ten-point average roughness Rz, the surface roughness of the base material belt 32 is not impaired even after coating, and the intermediate transfer of the recording paper is effectively performed. It can be separated from the belt (when the thickness of the coat layer 33 is larger than the ten-point average roughness Rz, the base material belt 3
The surface roughness of No. 2 is eased by the coat layer, and the separability of the recording paper is deteriorated).

In this way, the surface of the intermediate transfer drum can be roughened without directly roughening the coat layer.

As described above, since the ten-point surface roughness Rz of the intermediate transfer drum is 10 to 30 μm, the gap between the intermediate transfer belt and the recording paper is substantially widened and the electrostatic force can be reduced. , The separability of recording paper is improved.

In the above example, the ten-point surface roughness Rz of the intermediate transfer drum is set to 10 to 30 μm, but since the average pitch Sm is 50 to 150 μm, the image quality does not deteriorate. Further, since the coat layer 33 does not contain a filler, the thickness of the coat layer is uniform and an image defect does not occur. Since the intermediate transfer drum is used as the intermediate transfer member, the transfer nip width is large, stable transfer characteristics are obtained, and the charge / discharge of the surface charge is determined by the volume resistivity. High quality images can be obtained without the need for lowering as in the method. In addition, since the conductive cylinder is used as a support and the elastic body is arranged in the intermediate layer in a structure integrated with this support, it is less likely to be damaged by external force from the surface and has excellent durability.

For comparison, a base belt was vulcanized and molded using a mirror-finished vulcanized core bar, and then the outer peripheral surface of the base belt was polished to form a polished surface. Then, a release layer having a thickness of 15 μm is applied to the polished surface so that the ten-point surface roughness Rz is 5
A high resistance belt of μm was prepared (hereinafter referred to as Comparative Example 1). When this comparative example 1 was used for the intermediate transfer drum,
Poor separation of recording paper occurred.

Further, the ten-point surface roughness Rz of the vulcanized core metal is 1
The base material belt was vulcanized and molded to have a thickness of 5 μm as described above. And, the thickness of 20 μm on the uneven surface (rough surface) of the base material belt.
A release layer of m was coated to prepare a high resistance belt (hereinafter referred to as Comparative Example 2). As a result, in Comparative Example 2, the ten-point average surface roughness of the high resistance belt was 10 μm. Further, when this comparative example 2 was used for the intermediate transfer drum, no image defect was generated, but there was a problem in separability of the recording paper.

When forming the release layer, the average particle size is 20 μm.
The surface of the base material belt was coated with a release resin containing the above filler to prepare a high resistance belt (hereinafter referred to as Comparative Example 3). When this Comparative Example 3 was used for the intermediate transfer drum,
Nozzle clogging was likely to occur, and moreover, image defects frequently occurred.

In addition, when a release layer (coat layer) is applied to a base material belt made of a mirror-finished cored bar, the flow rate of the coating material is reduced to provide a high resistance belt having a large surface roughness. Was prepared (hereinafter referred to as Comparative Example 4). In Comparative Example 4, when the coat layer was formed, the surface roughness varied. Further, when Comparative Example 4 was used for the intermediate transfer drum, the surface roughness was greatly reduced due to abrasion, and the stable separation of the recording paper could not be maintained.

In the above example, the high resistance belt 34 is fitted to the elastic drum, but the high resistance belt 34 may be directly fitted to the conductive cylinder to form an intermediate transfer drum.

Further, in the above-mentioned example, the intermediate transfer drum is described as an example of the intermediate transfer member, but the above-mentioned high resistance belt is also used when a so-called intermediate transfer belt is used as the intermediate transfer member. be able to. At this time, the high resistance belt is formed into a belt shape, not a drum shape.

[0048]

As described above, in the present invention, when the intermediate transfer member is manufactured, the surface of the mold is roughened to form a rough surface of the mold, and then the elastic base material is placed on the rough surface of the mold. By molding, the surface of the elastic base material is polished to form a polishing surface, the elastic base material is released, and a coat layer is formed on the surface facing the polishing surface to form an intermediate transfer member. Since the transfer member is mounted on the support member to form the intermediate transfer member, there is an effect that the separation property of the recording medium is good and defects such as image defects can be prevented.

Further, if the elastic material of the base material is vulcanized and molded so that the supporting member includes the conductive support and the conductive elastic layer formed on the conductive support, the durability is improved. The effect is that you can.

Further, after using the mold as a drum-shaped core metal to polish the elastic base material, the elastic base material is inverted so that this surface becomes the inner peripheral surface to form a drum-shaped support member. By mounting the intermediate transfer member, the tension distribution of the intermediate transfer member becomes uniform, the cylindrical degree of the intermediate transfer drum, which is an intermediate transfer member, is kept good, and uneven transfer does not occur.

In addition, since the thickness of the coating layer is made thinner than the ten-point average roughness of the elastic material for the base material, the surface roughness of the elastic material for the base material is not impaired even after coating, and effective recording is possible. The effect is that the medium can be separated from the intermediate transfer member. Then, the ten-point average roughness of the surface of the mold is 15 to 30 μ.
If the average pitch is 50 to 150 μm, the image defects can be prevented and the separability of the recording medium can be improved.

Moreover, in the present invention, since it is not necessary to directly roughen the coating layer itself, a stable rough surface shape can be formed by a simple method.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of an image forming apparatus using an example of an intermediate transfer drum according to the present invention.

FIG. 2 is a diagram for explaining an example of a manufacturing process of an intermediate transfer member according to the present invention, (a) showing a roughened vulcanized core metal, and (b) vulcanizing a base rubber Diagram showing molding,
(C) is a diagram showing polishing of a base rubber, (d) is a diagram showing a base rubber released from a vulcanized core metal and inverted, and (e) is an uneven surface (rough surface) of the base rubber. It is a figure which shows the state which formed the coat layer in.

[Explanation of symbols]

11 Photosensitive drum 12, 13, 14, 15 Developer 16 charger 17 Cleaning unit 18 Intermediate transfer drum 19 Secondary transfer roller 20 cleaner 21 separator 22 Fixing unit 23 Registration roller 31 Vulcanized core metal 32 Base rubber (base belt) 33 Release layer (coat layer) 34 High resistance belt (intermediate transfer member)

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 2H200 FA13 GA23 GA34 GA44 GA47                       GB02 GB25 HA12 HB03 HB12                       HB22 HB48 JB10 JC02 JC07                       JC13 JC16 JC17 KA03 KA07                       KA28 LC02 LC03 MB04 NA06                 4F213 AA45 AB24 AD12 AG03 AG08                       AH33 WA39 WA53 WA54 WA58                       WA60 WA74 WA87 WB01

Claims (8)

[Claims] 1. An intermediate transfer used when a toner image formed on an image carrier is transferred as a primary transfer image, and the primary transfer image is secondarily transferred to a recording medium conveyed to a transfer nip portion. In the body, a support member and a base material rough surface formed on the basis of the rough surface of the mold, the surface of the mold being rough, and a base mounted on the support member with the rough surface of the base material as a surface. An intermediate transfer member comprising a material elastic body and a coat layer formed on the rough surface of the base material. 2. An intermediate transfer used when a toner image formed on an image carrier is transferred as a primary transfer image, and the primary transfer image is secondarily transferred to a recording medium conveyed to a transfer nip portion. In a manufacturing method for manufacturing a body,
A first step of roughening the surface of the mold to form a rough surface of the mold;
Second step of molding the base elastic body on the rough surface of the mold, and third step of polishing the surface of the base elastic body to form a polished surface
The step of releasing the elastic body of the base material to form the coat layer on the rough surface of the base material facing the polishing surface to form an intermediate transfer member, and the intermediate surface on the polishing surface. A fifth step of mounting a transfer member on the support member to form the intermediate transfer member. 3. The method of manufacturing an intermediate transfer member according to claim 2, wherein the base elastic body is vulcanized and molded in the second step. 4. The method of manufacturing an intermediate transfer member according to claim 2, wherein the supporting member has a conductive support and a conductive elastic layer formed on the conductive support. 5. The metal mold is a drum-shaped core metal, and in the fourth step, the elastic base material is inverted so that the polishing surface becomes an inner peripheral surface, and the supporting member is a drum. The method for producing an intermediate transfer member according to claim 2, wherein the intermediate transfer member is in the form of a sheet. 6. In the first step, the surface of the mold has a ten-point average roughness of 15 to 30 μm and a pitch average value of 50 to 50 μm.
The method for producing an intermediate transfer member according to claim 2, wherein the surface is roughened to 150 μm. 7. The intermediate transfer member according to claim 2, wherein in the fourth step, the thickness of the coat layer is made thinner than the ten-point average roughness of the elastic substrate. Production method. 8. An intermediate transfer member manufactured by the manufacturing method according to claim 2, wherein the toner image formed on the image carrier is transferred to the intermediate transfer member as a primary transfer image. The image forming apparatus is characterized in that the primary transfer image is secondarily transferred onto the recording medium conveyed to the transfer nip portion.