JP2002194103A - Method for preparing rubber roller and heat-sealed roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for preparing a rubber roller wherein a silicone rubber is coated on the base material, and the adhesion of both can be maintained firmly. SOLUTION: In the method for preparing the desired rubber roller by coating the silicone rubber on the base material, the surface of which is previously treated with a primer, then a hydrodienepolysiloxane having at least 2 silicon atom bonded-hydrogen atoms in one molecule, is coated thereon, next an addition reaction type-silicone rubber material, containing organopolysiloxanes having vinyl groups, and hydrodienepolysiloxanes having silicon atom bonded- hydrogen atoms, wherein H/Vi number which is the ratio of molar number of H in the silicon atom bonded-hydrogen atoms to molar number of Vi in the vinyl groups is 1.0 to 1.5, is coated on this hydrodienepolysiloxane, and the coated addition reaction type-silicone rubber material is cured, and the base material and the silicone rubber are integrally molded by adhesion to obtain the desired rubber roller.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a rubber roller used for OA equipment such as a copying machine and a facsimile,
And a heat fixing roller.

[0002]

2. Description of the Related Art Various types of rubber rollers are frequently used in apparatuses having a means for transporting paper or the like, such as OA equipment such as copiers and facsimile machines. For example, in a copying machine and an LBP electrophotographic apparatus, rubber rollers are used in various parts such as a charging roller, a transfer roller, a developing roller, a roller for conveying recording paper such as a resist and a discharge roller, and various rollers in a heat fixing device. Used. These rubber rollers include those in which the core metal is directly covered with rubber, and those in which the functions are separated like a developing roller in which solid rubber is laminated on the surface layer of sponge rubber in order to achieve both low hardness and preferable electrical characteristics. It is used.

A heat fixing roller used in a heat fixing device of an electrophotographic apparatus has a function of pressing a recording sheet having a toner image on a heating surface and fixing the recording sheet. In particular, in a full-color copying machine, the toner layer is thicker than in the case of a monochrome image, and a mixed color is obtained by using a sharp melt toner to express a subtle hue.
High release performance is required, and it is often used with silicone oil applied to its surface. Therefore, the heat fixing roller is required to have some composite properties such as appropriate elasticity (hardness), heat resistance, oil resistance, and toner release property. However, it is difficult to simultaneously satisfy various required characteristics with a single material, that is, a single-layer elastic roller, and at present, the performance is shared among the respective layers, and a multi-layer structure in which the plurality of layers are combined is used. A method of using rollers to satisfy various required characteristics in a complex manner has been adopted.

[0004] For example, as a heat fixing roller, a roller having a two-layer structure in which a high release silicone rubber is laminated on a surface layer and a high heat resistance silicone rubber is laminated on a lower layer, and a lowermost layer formed by infiltration of silicone oil into an intermediate layer. There is known a three-layer roller having a fluorine rubber layer as an oil barrier layer for preventing rupture of the silicone rubber layer.

In particular, as the silicone rubber for the surface layer, an addition-reaction silicone rubber is preferably used because of its high mold release property and excellent moldability. As the silicone rubber composition for the surface layer, JP-A-5-214250 discloses, as its components, a high-viscosity linear dimethylpolysiloxane blocked with a terminal vinyl group and a special resin-like organopolysiloxane having two or more vinyl groups. A polysiloxane mixture having at least a siloxane is exemplified.

In general, the addition reaction type silicone rubber material contains, as components, an organopolysiloxane having an alkenyl group such as a vinyl group and a hydrogen organopolysiloxane having a silicon-bonded hydrogen atom. The alkenyl group reacts with and binds to a silicon-bonded hydrogen atom site by heating or the like in the presence of a butterfly such as a platinum-based compound. This bond is called cross-linking and the reaction
This is called a crosslinking reaction. As the cross-linking reaction proceeds, the silicone rubber material is cured and becomes a silicone rubber.

Here, when the ratio of the number of moles of silicon-bonded hydrogen atoms to the number of moles of vinyl groups is defined as H / Vi number,
/ Vi number is 0.6 in JP-A-7-41679.
A range of ２０20 is illustrated. When the H / Vi number is 1.0, the number of moles of the vinyl group and the number of moles of the silicon-bonded hydrogen atom are the same, which is theoretically sufficient for the reaction. However, in general, to obtain a cured silicone rubber, the H / Vi number is set to a value larger than 1.0.
However, when silicone rubber is used for the surface layer, H /
The Vi number may be used in a range relatively close to 1.0, such as 1.0 to 1.5. This is because, compared to the case where the H / Vi number is large, the density of the crosslinks is small and the surface energy is small, so that high releasability can be imparted.

[0008] The surface layer must be firmly adhered to a base layer such as a lower layer or an intermediate layer. In particular, the heat fixing roller
Since it is used in a pressed state at a temperature close to 00 ° C., it is necessary to maintain strong adhesive force under high temperature and pressure conditions. Furthermore, when used under conditions in which silicone oil is applied to the surface of the surface layer, the silicone oil may penetrate inside the surface layer and weaken the adhesive strength. Need to be maintained.

The present inventors have proposed a method of improving the adhesion between silicone rubber and fluororubber by surface treatment of fluororubber (Japanese Patent Application Laid-Open No. 9-325632), and disclosed a three-layer heat fixing roller using a pipe mold. Was disclosed.

[0010]

As described above, the surface layer has a relatively high H / Vi number of 1.0 to 1.5 such as 1.0 to 1.5.
An addition reaction type silicone rubber material set to a value close to 0 may be used. However, in this case, H /
As compared with the case where the Vi number is large, the adhesive force by the primer is small, and the strong adhesive force cannot be maintained under high temperature, pressure and oil permeation conditions, and the substrate and the surface layer may be peeled off. Becomes That is, obtaining a silicone rubber having a low surface energy by reducing the density of cross-linking due to high mold release has a problem that a silicone rubber having poor adhesiveness is obtained at the same time.
An object of the present invention is to provide a method of manufacturing a rubber roller capable of maintaining the adhesion between a surface layer and a substrate firmly, and a heat-fixing rubber roller obtained by the method.

[0011]

Means for Solving the Problems The invention according to the present application for solving the above problems is as follows. 1. In a method of manufacturing a rubber roller in which a silicone rubber is coated on a base material, a solution and / or dispersion of an addition reaction catalyst is applied to a base material whose surface has been previously treated with a primer, and a vinyl group is further applied to the coated surface. And a hydrogen organopolysiloxane having silicon-bonded hydrogen atoms, wherein the number of moles of silicon-bonded hydrogen atoms, H, and the number of moles of vinyl groups, Vi, is 1 / H / Vi. A rubber roller characterized in that a base material and silicone rubber are bonded and integrated by applying an addition reaction type silicone rubber material having a thickness of 0.0 to 1.5 and heating and curing the addition reaction type silicone rubber material. Manufacturing method. 2. 2. The method for producing a rubber roller as described in 1 above, wherein the addition reaction type silicone rubber material is heated from the substrate side when the material is cured by heating. 3. 3. A heat fixing roller for a heat fixing device of an electrophotographic apparatus, wherein a rubber roller obtained by the method described in 1 or 2 above is used. 4. In a method of manufacturing a rubber roller that coats a silicone rubber on a base material, a hydrogen polysiloxane having at least two silicon-bonded hydrogen atoms in one molecule is applied to a base material whose surface is previously subjected to primer treatment, On this hydrogen polysiloxane, an organopolysiloxane having a vinyl group and a hydrogen polysiloxane having a silicon-bonded hydrogen atom are included, and the number of moles H of the silicon-bonded hydrogen atom and the number of moles of the vinyl group Vi are An addition reaction type silicone rubber material having an H / Vi number of 1.0 to 1.5, which is a ratio, is applied, and the addition reaction type silicone rubber material is cured to bond and integrate the base material and the silicone rubber. A method for producing a rubber roller, comprising molding. 5. A heat fixing roller for a heat fixing device of an electrophotographic apparatus, wherein a rubber roller obtained by the method described in the above item 4 is used.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The above-mentioned substrate in the present invention is a member holding a surface layer, and a roller-shaped core metal or a heat-resistant polymer layer formed in a single layer or a multilayer on the core metal. And the like. Examples of the heat-resistant polymer layer include silicone rubber and fluorine rubber.

The above-mentioned primer treatment means that a primer for adhering the base material and the silicone rubber is formed on the surface of the base material in a state capable of exhibiting the adhesion performance, and the treatment is appropriately performed according to the type of the primer. For example, an organoalkoxysilane or an organoalkoxypolysiloxane resin containing an alkenyl group, and a primer composition containing a metal-based condensation reaction catalyst such as an organic titanate ester in a thickness of several μm to several tens μm on the substrate surface. After coating and drying, 100
A method of baking at a temperature of from 200C to 200C is well known.

The addition reaction catalyst of the solution / dispersion of the addition reaction catalyst applied to the primer-treated substrate in the first invention is defined as a silicon-bonded alkenyl group in the primer component and a silicon atom in the silicone rubber component. A catalyst for promoting an addition reaction (hydrosilylation reaction) with a bound hydrogen atom, and a platinum-based catalyst, a rhodium-based catalyst, and a palladium-based catalyst are known. Specific examples of the platinum-based catalyst include platinum fine powder, chloroplatinic acid, alcohol-modified chloroplatinic acid, a complex of platinum and diketone, a complex of chloroplatinic acid and olefin, a complex of chloroplatinic acid and alkenylsiloxane, and a mixture thereof. Those supported on a carrier such as alumina, silica and carbon black are exemplified.

These are dissolved / dispersed in ketones such as toluene, methylene chloride, acetone and methyl ethyl ketone (MEK), alcohols such as methanol and ethanol, petroleum solvents such as hexane, or silicone oil. use. Methylene chloride, ethanol and MEK are preferred from the viewpoint of wettability to the primer layer and appropriate volatility.

The amount of the catalyst is not particularly limited, but is 1 PPM to 10000 in terms of metal relative to the whole solution / dispersion.
Adjustment by PPM is suitable for workability and economy.
Methods for applying the solution / dispersion include spray coating,
There are brush coating, sponge coating, and the like, and any method may be adopted in the present invention. The application amount of the solution / dispersion is not particularly limited in the present invention, but is an amount necessary for the solution / dispersion to be continuously formed on the primer-treated substrate. It is in the range of 1 to 50 g per m ² . After application, the solvent is preferably dried until the volatile components are substantially eliminated.

The addition reaction type silicone rubber material formed on the catalyst coating layer contains, as components, an organoborosiloxane having a vinyl group and a hydrogen organopolysiloxane having a silicon-bonded hydrogen atom. The H / Vi number, which is the ratio of the number of moles of hydrogen atoms to the number of moles of vinyl groups, is set to 1.0 to 1.5. The vinyl group and the silicon atom-bonding group other than the hydrogen atom are not particularly limited, but are preferably a methyl group.
Means for forming this material on a substrate include mold casting,
There are a blade coat, a knife coat, a dip and the like, and any method may be adopted. In this material, crosslinking proceeds mainly by a crosslinking reaction between a vinyl group and a silicon-bonded hydrogen atom, and is cured as a silicone rubber. The means for causing the reaction is not particularly limited in the present invention, but preferably, a means is used in which a platinum-based catalyst is contained in the material in a catalytic amount and the crosslinking reaction proceeds by heating.

When the substrate and the silicone rubber are integrally bonded and molded by the above means, the addition reaction-type silicone rubber material before curing is brought into contact with the addition reaction catalyst on the surface of the substrate. (Hydrosilylation reaction) between the silicon-bonded hydrogen atom and the silicon-bonded alkenyl group in the primer component. Accordingly, the addition reaction involved in the adhesion is promoted, and at the same time, the crosslink density of the silicone rubber material near the interface increases, and the adhesion of the base layer surface to the primer becomes strong.

When the addition-reaction-type silicone rubber material is cured by heating, as in the conventional method, when heating is performed from the mold, that is, from the silicone rubber side, the crosslinking reaction of the uncrosslinked silicone rubber proceeds from the mold side, and the adhesive reaction proceeds. Tend to progress slowly. This tendency is due to thermal conductivity. Therefore, when a pipe-shaped core is used as the core, if the core has a large heat capacity compared to the thickness of the unvulcanized rubber, or if the heat capacity of the core is large, such as a thick pipe-shaped core, the base material is further reduced. In the case of a rubber roller, the above tendency becomes remarkable because the heat capacity is further increased and the temperature rise at the interface of the adhesive layer is slowed. At this time, if the cross-linking reaction is completed prior to the adhesion reaction, it may not be possible to obtain a sufficiently strong initial adhesive force when opened for adhesion to the substrate.

By heating from the substrate side as in the present invention, the adhesion reaction between the substrate surface and the uncrosslinked rubber proceeds with priority over the crosslinking reaction, so that the adhesion reaction is surely completed. Adhesion becomes possible. The method of heating from the base material side is direct heating of the core metal by induction heating if the core metal is a magnetic substance, or if the core metal is a pipe, insert a rod-shaped heater inside the core metal and from the inner surface of the core metal A heating method may be used.

If the uncrosslinked silicone rubber is too thick and the crosslinking reaction of the rubber is too slow, a heating means from the rubber side, such as heating a mold, can be used in combination.

The hydrogen siloxane to be coated on the primer-treated substrate in the above invention 4 is
It has at least two silicon-bonded hydrogen atoms in one molecule. The reason that the number of silicon-bonded hydrogen atoms is at least two is that if one is used, when a cross-linking reaction occurs, only one vinyl group site is cross-linked, so that a cross-linked state as a rubber cannot be obtained. It is. The silicon atom-bonding group other than a hydrogen atom is not particularly limited, but is preferably a methyl group. As a method of applying this component,
There are spray coating, brush coating, sponge coating and the like, and any method may be adopted. The coating amount of this component is not particularly limited, but the amount necessary to coating film is continuously formed on a substrate that has been primed, normally, coating surface 1 m ² per 0.01 It is in the range of 2 g.

The addition reaction type silicone rubber material formed on the hydrogen polysiloxane is the same as that in the first invention. That is, it contains an organopolysiloxane having a vinyl group and a hydrogen organopolysiloxane having a silicon-bonded hydrogen atom as components, and has a ratio of the number of moles of the silicon-bonded hydrogen atom to the number of moles of the vinyl group, H / Vi. The number is 1.0-1.
Set to 5. The vinyl group and the silicon atom-bonding group other than the hydrogen atom are not particularly limited, but are preferably a methyl group. Means for forming these materials on a substrate include die casting, blade coating, knife coating, dip, and the like, and any method may be employed. In this material, crosslinking proceeds mainly by a crosslinking reaction between a vinyl group and a silicon-bonded hydrogen atom, and is cured as a silicone rubber. The means for reacting is not particularly limited,
Preferably, a catalytic amount of a platinum-based catalyst is contained in the material, and a means for promoting a crosslinking reaction by heating is used. As the heating method, a method such as the above-described heating from the base material side and heating of the mold is employed.

When the substrate and the silicone rubber are bonded and integrated by the above means, the hydrogen polysiloxane applied on the substrate is added to the unreacted silicone rubber material near the interface between the substrate and the surface layer before curing. When the silicone rubber material is in contact with and cured, the crosslink density of the silicone rubber material near the interface increases, and the adhesion of the base material surface to the primer becomes strong.

Embodiment An embodiment of the present invention will be described below.

Example 1 A rubber roller was prepared by the method according to the first aspect of the invention. FIG. 1 shows a schematic cross section of the configuration of the rubber roller. First, an outer diameter of 56 mm having bearing portions at both ends and a thickness of 1 mm
The surface of a cylindrical aluminum core bar 11 made of 0 mm was subjected to a primer treatment 12. The primer may be one known for peroxide-curable silicone rubber, and in this embodiment, DY is used.
A 39-012 primer (manufactured by Dow Corning Toray Silicone Co., Ltd.) is used. About 5 primers
It was spray-coated with a thickness of μm, air-dried, and then subjected to a primer treatment of baking in a hot-air circulating furnace at 200 ° C. After cooling, the cored bar was mounted on an iron pipe-shaped die whose inner diameter was adjusted so that the rubber thickness became 2 mm. The core is fixed in the mold via an iron piece having an injection port (not shown) in the mold. Uncrosslinked silicone rubber was injected into the mold at room temperature using an injection molding machine. This silicone rubber uses DY32-542U which has been previously kneaded with RC4 (manufactured by Dow Corning Toray Silicone Co., Ltd.) as a peroxide vulcanizing agent. Subsequently, the mold was heated in a hot plate at 200 ° C. for 20 minutes. After cooling and demolding, secondary vulcanization was performed in a hot air circulating furnace at 200 ° C. for 4 hours to obtain a peroxide-curable silicone rubber roller roller. Subsequently, an oil barrier layer 14 made of fluorine rubber having a thickness of 50 μm was formed on the surface of the silicone rubber roller obtained by the above method, and was prepared as a base material of the rubber roller of the present invention. The surface of the rubber roller of the base material was subjected to a primer treatment 15. The primer may be a primer known for addition reaction type silicone rubber, and in this example, XP81-405.
A primer (manufactured by Toshiba Silicone Co., Ltd.) is used. This primer was spray-coated with a thickness of about 5 μm, air-dried, subjected to a primer treatment of baking in a hot-air circulating furnace at 150 ° C. for 30 minutes, and cooled. Subsequently, a solution / dispersion of the addition reaction catalyst 16 was spray-coated on the primer-treated base material 15 so as to have a concentration of about 5 g / m ² . In this example, an ethanol solution of chloroplatinic acid adjusted to 50 ppm in terms of platinum was used as the solution / dispersion of the addition reaction catalyst. Furthermore, the ethanol was evaporated and removed by leaving it at a temperature of 30 ° C. for about one hour. Subsequently, the addition reaction type silicone rubber material to be the surface layer 17 was coated by a knife coat method so as to have a thickness of about 250 μm. The H / Vi number of this addition reaction type silicone rubber material was 1.3. This H / Vi number is 1
By H-NMR, the number of moles of a vinyl group and a silicon-bonded hydrogen atom in the addition reaction type silicone rubber material was quantitatively analyzed and calculated. Subsequently, a 1 KW rod-shaped halogen heater having substantially the same length as the core metal was inserted into the rubber roller core so as to be disposed substantially at the center, and heating was performed from the inside of the core. The rubber roller core was rotated around a halogen heater at a rotation speed of about 10 rpm so that the rubber roller of the substrate was uniformly heated. Approximately 1 for the rubber roller surface to reach 150 ° C
It took 0 minutes, and the halogen heater was ON / OFF controlled so that the roller surface was maintained at 150 ° C., and heating was continued for 5 minutes.

After cooling, the roller was subjected to secondary vulcanization in a hot air circulating furnace at 200 ° C. for 4 hours to obtain a multi-layer silicone rubber fixing roller having a surface layer made of an addition-reaction type silicone rubber. (Adhesion endurance test) In order to examine the performance of this roller, an adhesion endurance test was carried out using the following heat and pressure fixing device.

FIG. 3 shows a schematic sectional view of the configuration of the heating and pressing fixing device. In the heat and pressure fixing device, the multi-layer silicone rubber fixing roller prepared in Example 1 was used as the fixing roller 21 and the pressure roller 22. At the center of each roller, a heater 23 composed of a halogen lamp is located. The output of the heater 23 of the fixing roller 21 and the pressure roller 22 is controlled based on the temperature measured by a temperature measuring element (not shown) in contact with the surface, and is maintained at a set temperature. An oil application roller 24 is in contact with the fixing roller 21 and is driven by the fixing roller. The oil application roller 24 applies a fixed amount of release assist oil to the surface of the fixing roller. An elastic blade 25 is provided on the fixing roller 21.
However, elastic blades 26 are pressed against the pressing roller 22. In these elastic blades, one corner of an edge parallel to the long axis is pressed against the roller surface with a constant pressure.

This heat-pressure fixing device is set on an external idle rotating machine, controls the temperature and the rotation speed of the fixing roller and the pressure roller, and transfers a transfer sheet (A4 size paper) with a predetermined unfixed toner image. ) 27. The external idle rotating machine is a machine for operating the heating and pressing fixing device, and includes a motor for rotating the fixing roller and the pressing roller, and a control device for controlling the temperature and the number of rotations of the motor.
When passing a black solid toner image, the temperature was set to 190 ° C. and the number of rotations of the roller was set to 40 rpm. p. m. Set to. 50,000
During continuous feeding of sheets, no transport failure such as paper wrinkles or image defects due to surface layer peeling and lower layer peeling was observed.

Comparative Example 1 A surface layer was formed in the same manner as in Example 1 except that the step of spray-coating the solution / dispersion of the addition reaction catalyst was not carried out. The addition reaction type silicone rubber material was coated by a knife coat method so as to have a thickness of about 250 μm. Then 150 ° C
The primary vulcanization was performed in a warm air circulation furnace for 1 hour. Subsequently, secondary vulcanization was performed in a hot air circulating furnace at 200 ° C. for 4 hours to obtain a silicone rubber fixing roller having a surface layer made of an addition reaction type silicone rubber.

Using the multilayer silicone rubber fixing roller prepared in Comparative Example 1 as the fixing roller 21 and the pressing roller 22 of the same heat and pressure fixing device as in Example 1, the same continuous paper passing test as in Example 1 was performed. As a result, paper wrinkles were observed after 10,000 sheets were passed, and thereafter, partial peeling of the fixing roller surface layer was confirmed, and the test could not be continued.

Example 2 A rubber roller was prepared by the method according to the fourth aspect of the present invention. FIG.
FIG. 1 shows a schematic cross section of the configuration of the rubber roller 1. First of all, the outer dimensions of the two bearings are 56 mm and the thickness is 1.
The surface of a cylindrical aluminum core bar 11 made of 0 mm was subjected to a primer treatment 12. The primer may be one known for peroxide-curable silicone rubber, and in this embodiment, DY is used.
A 39-012 primer (manufactured by Dow Corning Toray Silicone Co., Ltd.) is used. About 5 primers
It was spray-coated with a thickness of μm, air-dried, and then subjected to a primer treatment of baking in a hot-air circulating furnace at 200 ° C. After cooling, the cored bar was mounted on an iron pipe-shaped die whose inner diameter was adjusted so that the rubber thickness became 2 mm. The core is fixed in the mold via an iron piece having an injection port (not shown) in the mold. Uncrosslinked silicone rubber was injected into the mold at room temperature using an injection molding machine. This silicone rubber uses DY32-542U which has been previously kneaded with RC4 (manufactured by Dow Corning Toray Silicone Co., Ltd.) as a peroxide vulcanizing agent. Subsequently, the mold was heated in a hot plate at 200 ° C. for 20 minutes. After cooling and demolding, secondary vulcanization was performed in a hot air circulating furnace at 200 ° C. for 4 hours to obtain a peroxide-curable silicone rubber roller roller. Subsequently, a rubber roller having an oil barrier layer 14 made of fluorine rubber with a thickness of 50 μm formed on the surface of the silicone rubber roller obtained by the above method was prepared as a base material. The surface of the rubber roller of the base material was subjected to a primer treatment 15. The primer may be a primer known for addition reaction type silicone rubber, and in this example, XP81-405.
A primer (manufactured by Toshiba Silicone Co., Ltd.) is used. This primer was spray-coated with a thickness of about 5 μm, air-dried, subjected to a primer treatment of baking in a hot-air circulating furnace at 150 ° C. for 30 minutes, and cooled. Subsequently, hydrogen polysiloxane was spray-coated on the primer-treated substrate 15 so as to be about 1 g / m ² . In this example, methyl hydrogen polysiloxane KF-99 (manufactured by Shin-Etsu Silicone Co., Ltd.) having at least two silicon-bonded hydrogen atoms in one molecule was used as the hydrogen siloxane 18. Subsequently, the addition reaction type silicone rubber material to be the surface layer 17 was coated by a knife coat method so as to have a thickness of about 250 μm. The H / Vi number of this addition reaction type silicone rubber material was 1.3. This H / Vi number is 1
By H-NMR, the number of moles of a vinyl group and a silicon-bonded hydrogen atom in the addition reaction type silicone rubber material was quantitatively analyzed and calculated. Subsequently, primary vulcanization is performed in a hot air circulating furnace at 150 ° C. for 1 hour, and then secondary vulcanization is performed in a 2000 hot air circulating furnace for 4 hours to fix silicone rubber having a surface layer made of an addition-reaction type silicone rubber. Roller was obtained. (Adhesion endurance test) In order to examine the performance of this roller, an adhesion endurance test was performed using the heating and pressing fixing device used in Example 1.

The heating and pressing fixing device includes the multilayer silicone rubber fixing roller prepared in Example 2 and the fixing roller 2.
The test was performed in the same manner as in Example 1 except that the test roller 1 and the pressure roller 22 were used.

During 50,000 sheets of continuous paper passing, surface layer peeling,
No transport failure such as paper wrinkles or image failure due to lower layer peeling was observed.

Comparative Example 2 An addition-reaction silicone rubber was used in the same manner as in Example 2 except that the step of spray-coating hydrogen polysiloxane was not performed. Was obtained.

The multi-layer silicone rubber fixing roller prepared in Comparative Example 2 was replaced with a fixing roller 21 and a pressure roller 22.
And a continuous paper-passing experiment similar to that in Example 2 was carried out. As a result, paper wrinkles were observed after 10,000 sheets were passed, and after that, partial peeling of the fixing roller surface layer was confirmed, and the test was continued. Became impossible.

[0037]

As described above, if a rubber roller having a base material coated with silicone rubber is manufactured by the method of the present invention, the adhesion between the surface layer and the base material can be maintained firmly. When used in the heat fixing device, excellent durability performance free from transfer paper transfer failure, image failure and the like can be exhibited.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of a multilayer silicone rubber heat fixing roller of Example 1 of the present invention.

FIG. 2 is a schematic sectional view of a multi-layer silicone rubber heat fixing roller of Example 2 of the present invention.

FIG. 3 is a schematic cross-sectional view of a heat-press fixing device used in an adhesion durability test of the heat fixing roller of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Cylindrical core metal 12 Primer 13 Silicone rubber layer 14 Oil barrier layer 15 Primer 16 Addition reaction catalyst 17 Surface layer 18 Hydrogen polyoxane 21 Heat fixing roller 22 Pressure roller 23 Heater 24 Oil application roller 25 Elastic blade 26 Elastic blade 27 Transfer paper

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C09D 183/07 C09D 183/07 4J002 F16C 13/00 F16C 13/00 B 4J038 E G03G 15/20 103 G03G 15 / 20 103 // B29C 45/14 B29C 45/14 B29K 83:00 B29K 83:00 B29L 31:32 B29L 31:32 (72) Inventor Masaaki Takahashi 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Stocks Inside the company (72) Inventor Hideo Kawamoto 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Yuji Kitano 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. F Terms (reference) 2H033 AA25 BB03 BB06 BB14 BB15 BB26 BB29 BB30 BB31 3J103 AA02 AA15 BA03 EA11 FA10 GA02 GA57 GA58 HA03 HA53 4F071 AA67 AG11 AH16 CA02 CD03 CD05 CD07 4F206 AA33A AA45 AD34 AH04 JA07 JB12 JL02 JW33 4F213 AA33 AA45 AD05 AG03 AG14 WA05 WA15 WA53 WA58 WA83 WB01 4J002 CP042 CP141 DA116 DE196 FD156 GQ00 4J038 DL041 PA04 DL041

Claims (5)

[Claims] In a method of manufacturing a rubber roller in which a base material is coated with silicone rubber, a solution and / or dispersion of an addition reaction catalyst is applied to a base material whose surface has been previously subjected to a primer treatment, and the coated surface is further applied. On the top, there is contained an organopolysiloxane having a vinyl group and a hydrogen organopolysiloxane having a silicon-bonded hydrogen atom, wherein H is the ratio of the number of moles H of silicon-bonded hydrogen atoms to the number of moles Vi of vinyl groups. / Vi number is 1.0 to 1.5
A method of manufacturing a rubber roller, comprising applying an addition-reaction-type silicone rubber material as described above and heat-curing the addition-reaction-type silicone rubber material to bond and integrate the base material and the silicone rubber. 2. The method for producing a rubber roller according to claim 1, wherein when the addition reaction type silicone rubber material is cured by heating, the material is heated from the side of the base material. 3. A heat fixing roller for a heat fixing device of an electrophotographic apparatus, wherein a rubber roller obtained by the method according to claim 1 or 2 is used. 4. A hydrogen roller having at least two silicon-bonded hydrogen atoms per molecule on a substrate whose surface has been previously subjected to a primer treatment in a method for producing a rubber roller in which silicone rubber is coated on the substrate. Is applied on the hydrogen polysiloxane,
The composition contains an organopolysiloxane having a vinyl group and a hydrogenpolysiloxane having a silicon-bonded hydrogen atom, and the H / Vi number that is a ratio of the mole number H of the silicon-bonded hydrogen atom to the mole number Vi of the vinyl group is 1.0-1.
5 by applying an addition-reaction-type silicone rubber material and curing the addition-reaction-type silicone rubber material;
A method for producing a rubber roller, wherein a base material and silicone rubber are bonded and integrally molded. 5. A heat fixing roller for a heat fixing device of an electrophotographic apparatus, wherein a rubber roller obtained by the method according to claim 4 is used.