JP2001323160A - Conductive member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conductive member in which good adhesion of the rein layer to the elastomer layer and uniform conductivity are realized. SOLUTION: A resin layer 13 obtained by heating a resin stock essentially consisting of an amide-bond- or urethane-bond-containing resin component and an aminic silane coupling agent is formed on the periphery of an elastomer layer 12 mainly consisting of a silicone rubber and formed on the periphery of an core shaft 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic apparatus (also referred to as an electrophotographic apparatus) such as a receiving apparatus such as a copying machine, a printer, a facsimile, etc.
The present invention relates to a conductive member used in contact with a photoconductor.

[0002]

2. Description of the Related Art Power supplies for copying machines, facsimile machines, printers, etc.
The photoreceptor charges the photoreceptor or displays an electrostatic latent image.
10 for imaging⁶-10^TenΩ semiconductive region.
Materials with conductivity (electric resistance) suitable for the purpose of
It is used for For example, one-component electrophotography
In the device, the photoconductor is separated from the developing roller pressed against each other.
(Drum) to transfer the developer (toner) to the electrostatic latent image
It is visualized and developed. For such an electrophotographic device
The elastic layer of the conductive member used is such that the elastic member is
With a predetermined contact width or with a blade
Deformable because it carries a thinner layer of developer
In addition, it is necessary to be excellent in deformation recovery (that is, elasticity).
Furthermore, these conductive members do not cause image unevenness.
For 10 ⁶-10^TenModerately uniform conductivity between Ω
Required to have.

[0003] In order to satisfy these requirements, conventionally, a conductive member in which an elastic layer containing silicone rubber having conductivity has been formed on the outer periphery of a mandrel or a conductive member having conductivity has been used. What used the elastic body layer containing urethane rubber formed in the outer periphery of the mandrel is used. However,
Urethane rubber is excellent in abrasion resistance, but other mechanical properties are sometimes insufficient. Silicone rubber is excellent in chemical stability and the like, but insufficient in abrasion resistance in some cases.

[0004]

Accordingly, various proposals have been made for materials having excellent deformation recovery properties typified by silicone rubber in order to improve the properties that may be insufficient while utilizing the properties. It has been done.

[0005] For example, it is disclosed that a resin layer is formed by coating an outer periphery of an elastic layer such as silicone rubber with a material having good wear resistance. That is, Japanese Patent Publication No. 50-1366
No. 1 discloses a technique using a polyamide-based material. Japanese Patent Publication No. 64-1018, Japanese Patent Application Laid-Open No. 64-66674, and Japanese Patent Application Laid-Open No. 64-66676 disclose N-methoxymethylated polyamide. Are disclosed. In these disclosed examples, by coating a resin layer made of a polyamide-based material, the chargeability of the developer, the non-adhesiveness of the surface, and the resistance are all improved.

However, when an elastic layer having a hardness low enough to realize a good nip width is used, problems arise in the adhesiveness between the elastic layer and the resin layer and the deformation followability, and the conductive member has a problem. Durability may be reduced. In particular, when silicone rubber is used for the elastic layer and a polyamide resin or urethane resin is coated as the resin layer, the silicone rubber is a material having good mold release properties. It has been difficult to achieve good adhesiveness with a urethane-based resin.

[0007] However, since silicone rubber, polyamide resin and urethane resin are materials having excellent performance, it is desirable to use these materials. Various proposals have been made. As for silicone rubber, it is common to provide some kind of adhesive layer for bonding the inner and outer surfaces thereof.
As described in Japanese Unexamined Patent Publication (Kokai) Publication No. 2000-163, a silane coupling agent is widely used for the adhesive layer. However,
In the conventional method, sufficient adhesiveness may not be obtained. Non-uniformity may occur, resulting in non-uniform adhesion.

Further, as an attempt to improve the adhesion between the mandrel and the elastic layer, an adhesive layer made of a silane coupling-based adhesive, a silane coupling-based adhesive, By sequentially providing three different layers of a mixed layer composed of an agent and a silicone rubber material and an elastic layer composed of a silicone rubber material, it is possible to improve the adhesiveness between the shaft core and the silicone rubber elastic layer. 24439
No. 4 discloses this. Japanese Patent Application Laid-Open No. 6-955 discloses a method for selecting an appropriate adhesive component in consideration of the material used for the outer periphery.
Japanese Patent Application Laid-Open No. 45-268 discloses that an adhesive layer provided between a silicone rubber layer and a fluororesin coating layer is preferably a silicone rubber layer having a specific composition.
No. 631 discloses that an adhesive layer provided between a silicone rubber layer and a layer made of a mixture of urethane and acrylic urethane and an acrylic silicone copolymer has a hydrogenated acrylonitrile-butadiene copolymer rubber (hydrogenated nitrile rubber). : H-NBR).

However, in any of the above cases, the adhesive property is enhanced by providing an adhesive layer having an intermediate composition between the adjacent layers, and the adhesive layer is a mixed layer. In some cases, and a particularly required uniform conductivity may not be obtained. Furthermore, since the layer configuration becomes complicated and the process becomes complicated with it, sufficient productivity may not be realized in some cases.

Japanese Patent Application Laid-Open No. 9-218564 discloses an example in which a silicone rubber is bonded to a silicone rubber without an adhesive layer by adding an amino-based curing agent to a vinylidene fluoride-based elastomer. It has been disclosed. The comparative examples using a polyamide resin for the surface layer shown therein show poor durability and environmental stability. On the other hand, Japanese Patent Application Laid-Open No. 7-300564 discloses a method of improving adhesion of a polyamide resin, in which a saturated hydrocarbon-based or oxyalkylene-based polymer having a hydrosilyl group or the like can be coated without an adhesive layer. It is disclosed. However, Japanese Unexamined Patent Publication No. 9-292767 by the same inventors discloses that the bonding between the elastic layer made of the oxyalkylene-based curable composition and the layer of the N-methoxymethylated polyamide includes a coupling agent layer. It is disclosed that the adhesion improves by providing. That is, it has been suggested that in the case of a polyamide coating, sufficient adhesiveness may not be achieved without an adhesive layer.

In recent years, the required performance of conductive members used in electrophotographic apparatuses has become higher, and uniform conductivity required for high resolution and durability required for high speed ( (Adhesion) is required to be improved. However, as described above, it is not always easy to realize these required performances by a simple method.

In the present invention, in view of the above situation, an elastic layer mainly composed of silicone rubber and a resin containing an amide bond (polyamide resin) are formed without forming a new intermediate layer such as an adhesive layer. The present invention provides a conductive member capable of improving the adhesiveness to a resin containing a urethane bond (also described as a urethane-based resin) or a resin containing a urethane bond, suppressing variation in electric resistance and realizing uniformity of conductivity. The purpose is to do.

[0013]

According to the present invention, there is provided a conductive member comprising at least a mandrel, an elastic layer and a resin layer laminated from the inside to the outside. The elastic layer is mainly made of silicone rubber, and the resin layer is obtained by heating a resin material containing at least a resin component having an amide bond or a urethane bond and an amine-based silane coupling agent. A conductive member is provided.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION The resin layer according to the present invention comprises a resin material containing a polyamide resin or a urethane resin and an amine silane coupling agent on the surface of an elastic layer mainly composed of silicone rubber. It is formed by applying and heating this. With such a configuration,
The adhesiveness between the resin layer and the elastic layer is improved, variation in electric resistance is suppressed, and uniform conductivity can be realized.

The reason why the above effects can be obtained is speculated as follows. That is, in the present invention, the amine-based silane coupling agent is not directly applied to the surface of the elastic layer but is used by being mixed with a resin raw material. For this reason, the amino group of the amine-based silane coupling agent reacts with a carboxyl group or an alcohol group remaining at the terminal of the resin molecule, or interacts with an -NH-CO- bond of an amide bond or a urethane bond, It shows a good dispersion state in the resin component. As a result, adhesion unevenness is suppressed, and good adhesion and uniform conductivity can be realized.

Furthermore, the amine-based silane coupling agent in a well-dispersed state has its amino group oriented toward the resin component and the remaining alkoxy-modified group is oriented outward, so that these alkoxy-modified groups are present in the resin layer. They are arranged on the surface, forming a state like a monomolecular film. As a result, a strong adhesive force is realized between the resin layer and the elastic layer, and variation in electric resistance is suppressed.

Obtained by the above-described bonding mechanism,
Since the thin and uniform bonding surface realizes a strong and uniform bonding state, the deformation followability is improved, and the elastic layer can have a lower hardness.

The amine-based silane coupling agent used in the present invention is not particularly limited as long as it has one or more amino groups and one or more alkoxy-modified groups in the molecule. γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, N-phenyl-γ-aminopropyltrimethoxysilane, N-β- (aminoethyl) -γ-aminopropylmethyldimethoxysilane, N-β- ( Aminoethyl)
-Γ-aminopropyltrimethoxysilane, methylaminoethoxypropyldialkoxysilane and the like.

Particularly good effects can be obtained by adding the amine silane coupling agent as described above to the resin raw material. In other words, when the amine-based silane coupling agent is simply applied to the surface of the elastic layer, repelling or aggregation occurs depending on the surface state of the elastic layer, resulting in uneven concentration of the amine-based silane coupling agent. Variations in electrical resistance due to uneven bonding occur. Further, when an amine-based silane coupling agent is added to the elastic layer, it is difficult to obtain a stable adhesive force, and if the elastic body is a liquid type silicone, curing inhibition may also be caused. On the other hand, by adding the amine silane coupling agent as described above to the resin raw material, these problems are suppressed.

When a silane coupling agent having no amino group is added to a resin, adverse effects such as the formation of micelles in the resin solution and not fulfilling its original function may occur. On the other hand, when the above-mentioned amine silane coupling agent is used, such a problem is suppressed.

In the case where the resin layer to which the coupling agent is added is the outermost layer, there is a concern that the photosensitive drum and the like may be contaminated. In the present invention, the amine silane coupling agent as described above is used. Is used, the amine-based silane coupling agent is strongly restricted by the resin component.
Therefore, contamination can be suppressed by optimizing the type and amount of the amine-based silane coupling agent.
Further, in the present invention, since the reaction rate is increased by heating the resin raw material, the contamination is further suppressed.

The amount of the amine-based silane coupling agent to be added to the resin material depends on the purpose of the conductive member, the type of the resin,
The type of the amine-based coupling agent may be appropriately determined depending on the heating conditions and the like, but generally, in order to realize sufficient adhesive strength, the amount is preferably 0.5 parts by mass or more based on 100 parts by mass of the resin component. And more preferably 1 part by mass or more. on the other hand,
In order to achieve uniform dispersion, uniform conductivity, and low contamination of the amine-based silane coupling agent in the resin layer, the amount is preferably 30 parts by mass or less, more preferably 20 parts by mass or less.

The resin raw material in the present invention is heated in order to effectively react the added amine coupling agent. The conditions, particularly the temperature and the time, are appropriately selected depending on the coupling agent used in order to realize a sufficient reaction rate. For example, when γ-aminopropyltriethoxysilane is used, the temperature is preferably 100 ° C. or higher, more preferably 150 ° C. or higher, and preferably 200 ° C. or lower. The heating time depends on the heating temperature, but is preferably 5 minutes or more, more preferably 15 minutes or more,
It is preferably 60 minutes or less.

The silicone rubber used in the present invention includes polydimethylsiloxane, polymethyltrifluoropropylsiloxane, polymethylvinylsiloxane, polytrifluoropropylvinylsiloxane, polymethylphenylsiloxane, polyphenylvinylsiloxane,
Examples thereof include copolymers of these polysiloxanes. The degree of polymerization of these silicone rubbers is preferably in the range of 3000 or more and 15000 or less. In addition,
If necessary, the elastic layer may be made of natural rubber, isoprene rubber, chloroprene rubber, EPD, in addition to silicone rubber.
An elastomer such as M, SBR, NBR, etc.
It may be contained at a ratio of 0% by mass or less.

Further, various additives such as a conductive agent, a non-conductive filler, a cross-linking agent, a catalyst and a dispersion accelerator are appropriately blended in the elastic layer of the present invention.

Examples of the conductive agent include various conductive metals or alloys such as carbon black, graphite, aluminum, copper, tin and stainless steel, tin oxide, zinc oxide, indium oxide, titanium oxide, tin oxide-antimony oxide solid solution, and oxides. Various conductive metal oxides such as a tin-indium oxide solid solution, and fine powders of an insulating substance coated with these conductive materials can be used. Among these, carbon black is relatively easily available and good chargeability is obtained. As a dispersing means, a roll kneader, a Banbury mixer, a ball mill, a sand grinder, a paint shaker, or the like may be appropriately used.

In addition, as a means for imparting conductivity to the elastic layer, a conductive polymer compound may be added. For example, as a host polymer, polyacetylene, poly (p-phenylene), polypyrrole, polythiophenin, poly (p-phenylene oxide), poly (p-phenylene sulfide), poly (p-phenylenevinylene),
Using poly (2,6-dimethylphenylene oxide), poly (bisphenol A carbonate), polyvinylcarbazole, polydiacetylene, poly (N-methyl-4-vinylpyridine), polyaniline, polyquinoline, poly (phenylene ether sulfone), etc. AsF ₅ , I ₂ , Br ₂ , SO ₃ , N
a, K, ClO ₄ , FeCl ₃ , F, Cl, Br, I, K
Those doped with each ion such as r, Li, TCNQ and the like are used.

As the non-conductive filler, diatomaceous earth, quartz powder, dry silica, wet silica, titanium oxide, zinc oxide,
Aluminosilicate, calcium carbonate and the like can be mentioned.

Examples of the crosslinking agent include di-t-butyl peroxide, 2,5-dimethyl-2,5-di (t-butylperoxy) hexane, dicumyl peroxide, t-butylperoxybenzoate, and p-butylperoxide. Chlorobenzoyl peroxide and the like can be mentioned. When a liquid silicone rubber is used, a platinum-based catalyst is used using polyorganohydrogensiloxane as a crosslinking component.

The alkoxy-modified group of the amine silane coupling agent is considered to exhibit an adhesive force by hydrogen bonding with Si in the silicone rubber. Therefore, when the filler layer component such as silica is contained in the elastic layer, the alkoxy-modified group of the amine-based silane coupling agent also has reactivity with the functional group such as a silanol group on the surface. This is preferable because the adhesiveness becomes better.

The silica is not particularly limited, and conventionally known silicas can be widely used. For example, silicic anhydride by a dry method, hydrous silicic acid by a wet method, synthetic silicate, and the like can be used.

The amount of silica contained in the elastic layer can be selected as appropriate in order to obtain desired characteristics of the elastic layer such as hardness. It is preferably at least 10 mass%, more preferably at least 10 mass%. On the other hand, in order to produce a low-hardness elastic layer necessary for forming a sufficient nip, the content is preferably 50% by mass or less,
It is more preferably at most 40% by mass.

The elastic layer preferably has a volume specific resistance in the range of 10 ³ Ω · cm to 10 ¹⁰ Ω · cm when a DC voltage of 100 V is applied. When carbon black is used as the conductive agent, it is added in an amount of 5 parts by mass or more and 100 parts by mass or less based on 100 parts by mass of the silicone rubber in order to realize a preferable value of the volume resistivity.

The thickness of the elastic layer is preferably 0.5 mm or more, in order to secure a uniform nip.
m or more is more preferable. On the other hand, in order to keep the molding cost of silicone rubber low, it is preferably 6.0 mm or less,
5.0 mm or less is more preferable.

The polyamide resin used in the resin layer of the conductive member of the present invention is polyamide (nylon).
6, 6, 6, 6, 10, 6, 12, 11, 12, 12,
12. Copolymerized polyamides obtained from monomers used in these polyamides and different monomers can be exemplified, and alcohol-soluble polyamide resins are preferred from the viewpoint of workability. Examples of the alcohol-soluble polyamide-based resin include those obtained by adjusting the molecular weight of a terpolymer or a quaternary polyamide, and methoxymethylating polyamide (nylon) 6 or polyamide (nylon) 12 to make the resin soluble in alcohol or water. And the like.

The urethane-based resin used in the resin layer of the conductive member of the present invention may be a one-pack type or a two-pack type resin, and if necessary, an epoxy resin or a melamine resin may be used as a crosslinking agent. May be used.

As a means for imparting conductivity to the resin layer, a conductive agent may be blended with the resin raw material. As the conductive agent, those exemplified as the conductive agent to be contained in the elastic layer can be used. Among these conductive agents, as described above, carbon black is preferred because it is relatively easily available and good chargeability is obtained. Examples of the carbon black include conductive carbon such as Ketjen Black EC and acetylene black, SAF, ISAF, HAF, F
Examples include carbon for rubber such as EF, GPF, SRF, FT, and MT, carbon for color (ink) subjected to oxidation treatment, pyrolytic carbon, natural graphite, artificial graphite, and the like. Also, if necessary,
More than one type of carbon black can be used.

The amount of carbon black added to the resin layer may be appropriately determined according to the use of the conductive member, the type of resin, the type of carbon black, and the like, but the added carbon black sufficiently percolates. Therefore, the amount is preferably 1 part by mass or more based on 100 parts by mass of the resin component,
In order to achieve uniform dispersion in the resin layer and suppress variations in electric resistance, the amount is preferably 100 parts by mass or less, more preferably 70 parts by mass or less.

In the present invention, since the amine silane coupling agent is added to the resin raw material, the carbon black similarly added to the resin raw material is preferable because it is better dispersed in the solution. Further, after heating the resin raw material, the carbon black and the resin component are firmly adhered to each other via the amine-based silane coupling agent.

The thickness of the resin layer is preferably 3 μm or more in order to realize uniform coating and secure sufficient wear resistance. On the other hand, the thickness is preferably 100 μm or less in order to suppress the influence on the deformability and realize uniform conductivity.

The resin layer in the present invention can be produced, for example, as follows. That is, when an alcohol-soluble polyamide is used, the solution is prepared by dissolving the alcohol-soluble polyamide in alcohol so as to have a concentration of 3% by mass or more and 50% by mass or less based on the solution. Here, as the alcohol, methanol, ethanol, propanol, butanol and the like can be used.

If necessary, carbon black and the like are added and mixed to prepare a resin raw material. Next, a predetermined amount of an amine-based silane coupling agent is added to the obtained polyamide-containing solution, and the resin material is applied to the surface of the elastic layer.

The method of applying the resin raw material is not particularly limited, but may be air spray, roll coat, curtain coat,
The resin material is applied to the surface of the elastic layer by a method such as dipping. Then, in order to volatilize and dry the alcohol and react the amine silane coupling agent,
A heat treatment is performed.

FIG. 1 shows an example of the conductive member of the present invention.
The developing roller 1 is shown. In this example, a conductive elastic layer 12 is formed on the outer peripheral surface of a cylindrical or hollow cylindrical conductive mandrel 11, and the resin layer 1 is formed on the outer peripheral surface of the elastic layer 12.
3 are stacked.

The conductive mandrel 11 functions as an electrode of a conductive member and a support member, and is plated with a metal or alloy such as aluminum, copper alloy, stainless steel, chromium, nickel, or the like. It is made of a conductive material such as iron or synthetic resin. The outer diameter of the conductive mandrel is usually 4 mm or more and 10 mm or less.

The hardness and electric resistance of the elastic layer 12 are as follows:
The value is set so that the conductive member can be pressed against the surface of the member to be charged such as the photosensitive drum with an appropriate nip width and nip pressure. Such an elastic layer 12 is prepared by, for example, a method of injecting a liquid silicone rubber material into a mold and vulcanizing and curing; a method of vulcanizing and curing after extrusion molding; a method of vulcanizing and curing after injection molding. Can be.

In the conductive member of the present invention, if necessary,
In addition to the resin layer and the elastic layer, functional layers such as a surface protective layer, an adhesive layer, a diffusion preventing layer, an underlayer, and a primer layer may be provided. Further, the elastic layer may have a multilayer structure of two or more layers.

FIG. 3 shows the outermost layer 14 as an example of the functional layer.
Is formed. In this case, the amine-based silane coupling agent contained in the resin layer is preferable because contamination of the surface of the charged body such as the photosensitive drum is suppressed. In addition, the surface shape can be easily adjusted.

FIG. 4 shows a case where the elastic layer has a two-layer structure including the second elastic layer 15. in this case,
The degree of freedom regarding characteristics such as electric resistance and hardness can be increased.

The volume resistivity of the conductive member of the present invention is as follows:
It is preferable that the thickness be in the range of 10 ⁴ Ω · cm to 10 ⁹ Ω · cm. This is within the above range by appropriately combining the resistance value and the thickness of the elastic layer, the resistance value and the thickness of the resin layer, and the resistance value and the thickness of the layers provided in addition to the two layers. It is possible. By setting the volume resistivity of the conductive member to 10 ⁴ Ω · cm or more, excess current on the surface of the charged object can be suppressed, and even when pinholes are present on the surface of the charged object, leakage occurs. Can be suppressed. Further, by setting the volume specific resistance value to 10 ⁹ Ω · cm or less, charging of the member to be charged can be performed at a low voltage, and image quality defects due to insufficient charging amount can be suppressed.

In order to form a sufficient and uniform nip with the member to be charged, the Asker C hardness of the conductive member is preferably set to 70 ° or less. In the conventional conductive member, since the adhesion between the elastic layer and the resin layer is insufficient and the deformation followability is poor, the Asker C hardness is set to 50 °.
There were cases where it was not possible to: On the other hand, since the conductive member of the present invention has improved adhesiveness, Asker C
The hardness can be 50 ° or less. As a result, a sufficient and uniform nip can be formed with the member to be charged, and image quality defects due to poor charging can be suppressed.

The Asker C hardness is a hardness measured by an Asker rubber hardness tester (manufactured by Kobunshi Keiki Co., Ltd.) using a test piece prepared in accordance with the reference standard Asker C type SRIS (Japanese Rubber Association Standard) 0101. is there.

As described above, in the conductive member of the present invention, good adhesion between the resin layer and the elastic layer is realized, and the variation in electric resistance is suppressed. High conductivity can be realized. Therefore, it can be suitably used as a conductive member such as a developing roller, a charging roller, a transfer roller, and a pressure roller in an electrophotographic apparatus.

[0054]

The present invention will be described in more detail with reference to the following Examples, which do not limit the present invention in any way. Conductive members used in electrophotographic devices and the like, for example,
It can be suitably used as a charging member such as a charging roller, a transfer roller and a pressure roller, and a developing member such as a developing roller. Unless otherwise specified below, commercially available high-purity reagents were used.

Example 1 Developing Roller 1 A SUS core was prepared by applying nickel to a shaft core and further applying and baking an adhesive. This mandrel was placed in a mold and a liquid silicone rubber material (manufactured by Dow Corning Toray Silicone) was injected into a cavity formed in the mold. Subsequently, the mold was heated to cure and cure the silicone rubber, and after cooling, the mold was released to provide an elastic layer on the outer periphery of the mandrel. The Asker C hardness of the obtained elastic layer was 30 °. As the liquid silicone rubber, one containing a silica component of 30% by mass was used.

Next, an alcohol-soluble polyamide resin (Amilan CM8000, manufactured by Toray) as a resin component was
To a solution adjusted to a methanol solution having a solid content of 20%, γ-aminopropylethoxysilane (manufactured by Shin-Etsu Chemical) as an amine-based silane coupling agent was added to a resin component 10.
10 parts by mass was added to 0 parts by mass, and the mixture was sufficiently stirred to obtain a resin raw material liquid. Further, in this resin solution, the mandrel provided with the above-mentioned elastic layer was immersed in the resin raw material liquid, coated, and then pulled up and dried.
For 20 minutes to provide a resin layer on the outer periphery of the elastic layer. As described above, the developing roller 1 was manufactured.

Example 2 Developing Roller 2 The developing roller 2 was manufactured in the same manner as the developing roller 1 except that γ-aminopropyltrimethoxysilane (manufactured by Shin-Etsu Chemical) was used as the amine silane coupling agent. Was prepared.

Example 3 Developing Roller 3 Developing roller 3 was formed in the same manner as developing roller 1 except that the heating conditions after coating were 160 ° C. and 20 minutes.
Was prepared.

[Comparative Example 1] Developing roller 4 γ-aminopropylethoxysilane was added without adding γ-aminepropylethoxysilane to the resin raw material liquid.
A mass% toluene solution was prepared, and γ-
A toluene solution of aminopropylethoxysilane was applied directly. Then, it is dried at room temperature, and then
Heated for minutes. Otherwise, the developing roller 4 was manufactured in the same manner as the developing roller 1.

Comparative Example 2 Developing Roller 5 A developing roller 5 was prepared in the same manner as the developing roller 1 except that no amine-based silane coupling agent was used.

Example 4 As a resin component of the developing roller 6, a polyurethane resin (Nipporan 523) was used.
0, manufactured by Nippon Polyurethane Co., Ltd.) to prepare a mixed solution of an organic solvent having a solid content of 10%, and γ-aminopropylethoxysilane (manufactured by Shin-Etsu Chemical) as an amine-based silane coupling agent, and 100 parts by mass of a resin component Was added to the mixture and stirred sufficiently to obtain a resin raw material liquid.
In this resin raw material liquid, after immersing and coating the mandrel provided with the above-mentioned elastic layer, it is pulled up and dried,
The resin layer was provided on the outer periphery of the elastic layer by performing a heat treatment at 130 ° C. for 20 minutes.

Thereafter, the developing roller 6 was manufactured in the same manner as the developing roller 1.

[Comparative Example 3] Developing roller 7 was prepared by adding γ-aminopropylethoxysilane to the resin material solution without adding γ-aminopropylethoxysilane to
A mass% toluene solution was prepared, and γ-
A toluene solution of aminopropylethoxysilane was applied directly. Then, it is dried at room temperature, and then
Heated for minutes. Otherwise, the developing roller 7 was manufactured in the same manner as the developing roller 6.

Comparative Example 4 Developing Roller 8 A developing roller 8 was produced in the same manner as the developing roller 6 except that no amine-based silane coupling agent was used.

[Evaluation of Characteristics] The adhesiveness and conductivity of the developing roller obtained as described above were evaluated as follows.
The results are shown in Table 1.

(A) Adhesion state: The resin layer was peeled off using tweezers or the like, and the state was visually observed. As a result, the case where peeling was not confirmed on the adhesive surface was evaluated as ○, and the case where peeling was confirmed was evaluated as ×.

According to the above evaluation method, the developing rollers 1 to
No peeling was confirmed in any of the cases of 4, 6, and 7, whereas in the case of the developing rollers 5 and 8, peeling was confirmed.

(A) Adhesive strength: width 30 mm × length 100 m
An elastic layer of mx 2 mm in thickness was prepared, and a 20 mm peeling margin (a heat-resistant film was attached to the elastic layer and the resin layer so as not to adhere to each other) was provided at one end in the longitudinal direction.
By applying a resin layer thereto, test pieces for measuring the adhesive force were produced in the same manner as in the case of each developing roller.

Using the obtained test piece, the load required to peel the resin layer from the elastic layer was measured at a peeling speed of 0.5 mm / sec. The measured adhesive force is, in the case of the developing rollers 1 to 4, the value of the developing roller 4 as 100,
In the case of the developing rollers 6 and 7, the value of the developing roller 7 is set to 100
, Respectively. The larger the number, the better the adhesiveness.

As is clear from Table 1, it was found that the developing roller 1 was superior to the developing roller 4 in adhesiveness. This means that better adhesion can be realized when the amine-based silane coupling agent is contained in the resin layer than when the amine-based silane coupling agent is directly applied to the surface of the elastic layer. I have.

Further, it was found that the developing roller 2 was superior to the developing roller 1 in adhesiveness. This means that when the terminal of the amine-based coupling agent is a methoxy group rather than an ethoxy group, the reactivity is better and good adhesion can be realized.

Further, it was found that the developing roller 3 was superior to the developing roller 2 in adhesiveness. This means that a heating step at a certain temperature or higher is required in order for the amine-based coupling agent to work effectively, and in this case, the heating temperature is preferably 160 ° C. rather than 130 ° C. ing.

When a resin layer is formed using a urethane resin, the developing roller 6 is more excellent in adhesiveness than the developing roller 7, and the same result as that obtained by using a polyamide resin is obtained.

Although the results are not shown, it was also found that when the temperature in the heating step was lower than 100 ° C., the adhesive strength was significantly reduced.

It was also found that the same adhesive strength was obtained when carbon black was added to the resin layer for electric resistance adjustment.

(C) Uniformity of conductivity (variation of electric resistance): Electrodes were arranged at predetermined 10 locations on the surface of the developing roller, and the electric resistance between the electrode and the shaft was measured. The common logarithm of the electrical resistance was taken. Next, as a variation in electric resistance, (maximum value of logarithm)-(minimum value of logarithm)
Was calculated for each developing roller. The smaller the calculated value, the more uniform the conductivity of the developing roller.
Furthermore, the uniformity of the conductivity was evaluated as ○ when this value was 0.2 or less, Δ when it was more than 0.2 and 0.5 or less, and × when it was more than 0.5.

As is clear from Table 1, the developing rollers 1 to
It was found that variations in electrical resistance of the developing rollers 3 and 6 were small, and variations in electrical resistance of the developing rollers 4, 5, 7, and 8 were large. In particular, regarding the developing rollers 4 and 7, the variation in electrical resistance is
It was found that they were larger than the developing rollers 5 and 8, respectively.

The measurement results obtained as described above are shown in Table 1.

[0079]

[Table 1]

The overall evaluation in the table was evaluated as ○ when both the adhesion state and the uniformity of conductivity were ○.

[0081]

As described above, the conductive member of the present invention comprises a resin component having an amide bond or a urethane bond and an amine silane coupling agent on an elastic layer mainly composed of silicone rubber. In order to form a resin layer by applying a resin material comprising at least and heating it,
The adhesiveness between the resin layer and the elastic layer can be improved, variation in electric resistance can be suppressed, and uniform conductivity can be realized.

[Brief description of the drawings]

FIG. 1 is a schematic diagram for explaining an example of a conductive member according to the present invention.

FIG. 2 is a schematic cross-sectional view for explaining an example of a conductive member according to the present invention.

FIG. 3 is a schematic cross-sectional view for explaining another example of the conductive member according to the present invention.

FIG. 4 is a schematic cross-sectional view for explaining another example of the conductive member according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 developing roller 2 developing roller 3 developing roller 11 shaft core 12 elastic layer 13 resin layer 14 outermost layer 15 second elastic layer

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C08K 3/04 C08K 3/04 3/36 3/36 5/544 5/544 C08L 75/04 C08L 75 / 04 83/04 83/04 G03G 15/02 101 G03G 15/02 101 15/08 501 15/08 501D 15/16 103 15/16 103 (72) Inventor Kentaro Niwano 3-30-2 Shimomaruko, Ota-ku, Tokyo No. within Canon Inc. (72) Inventor Yuhiro Yamamoto 3-30-2 Shimomaruko, Ota-ku, Tokyo F-term within Canon Inc. (reference) 2H003 AA12 BB11 CC05 2H032 AA05 BA01 BA19 BA23 BA30 2H077 AD06 CA01 FA13 FA22 FA27 GA03 4F100 AA20B AA20H AA37C AA37H AB04 AB16 AH03C AH06C AK46C AK51C AK52B AN02B AT00A BA03 BA04 BA07 BA10A BA10C CA21C CA23B DA11 GB48 JG01 JK01 JK07B YY00B YY00J YY002H 2 CH072 CK021 CL011 CL031 CL051 CM012 CN012 CN032 CP031 CP081 CP141 DA027 DA037 DA077 DA097 DA117 DC007 DE097 DE107 DE137 DJ016 EX076 FD010 FD117 GQ02

Claims (5)

[Claims] 1. A conductive member comprising at least a mandrel, an elastic layer and a resin layer laminated from inside to outside, wherein the elastic layer is mainly made of silicone rubber, and Is a conductive member obtained by heating a resin material containing at least a resin component having an amide bond or a urethane bond and an amine-based silane coupling agent. 2. The composition according to claim 1, wherein the content of the amine silane coupling agent is 0.5 to 30 parts by mass based on 100 parts by mass of the resin component.
The conductive member as described in the above. 3. The heating temperature of the heating step is 100 ° C. or more and 200 ° C. or less.
The conductive member as described in the above. 4. The conductive material according to claim 1, wherein the resin layer contains 1 to 100 parts by mass of carbon black based on 100 parts by mass of the resin component. Sex members. 5. The conductive member according to claim 1, wherein the elastic body layer contains 5% by mass or more and 50% by mass or less of silica in the silicone rubber.