JP2001342318A - Fluororubber composition, fixing member, fixing method, and fixing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a toner from sticking to the surface of a fixing roller to thereby stably inhibit offsets for a long time, and thus improve the durability of the fixing roller. SOLUTION: A film, as the surface layer 103 of a fixing member, having specified surface roughness and surface energy is formed on the member by using a fluororubber composition mainly comprising a fluororubber having a fluorine content of 60 wt.%-70 wt.% as the material for the surface layer 103, by specifying the amounts of a reinforcement, an antacid, a vulcanizing agent, etc., compounded into the composition, and by specifying the average particle diameter of compounded particles in the composition to 5 μm or lower. By using such a fixing apparatus for fixing a toner T transferred onto a recording material P, the fixed toner T is prevented from sticking to the surface layer 103, enabling the prevention of offset.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluororubber composition, a fixing member, a fixing method, and a fixing device for use in an image forming apparatus, and more particularly, to fixing a toner transferred onto a recording material in the image forming apparatus. The present invention relates to a fluororubber composition and a fixing member that make it difficult for toner to adhere to the surface of a fixing member of a fixing device, and to a fixing method and a fixing device using such a fixing member.

[0002]

2. Description of the Related Art In an image forming apparatus, unfixed toner transferred onto a recording material such as paper is fixed by a fixing device installed in the apparatus.

FIG. 1 is a sectional view of a fixing device according to an embodiment of the present invention. A fixing device having the same configuration is used for a fixing device according to the related art. That is, as shown in FIG. 1, a fixing device for fixing the toner T transferred onto the recording material P includes a fixing roll 101 as a fixing member, a pressure roll 102 opposed thereto, and a fixing roll 101. And a web 104 impregnated with a silicone oil as a release agent for preventing the toner T from adhering to the surface material 103. The fixing roll 101 and the pressure roll 102
A silicone rubber elastic body 106 is coated on the core 105, and a heater 107 is provided in the core 105 of the fixing roll 101 as a heating source.

A recording material P such as a sheet on which an image is formed by transferring the toner T is sandwiched between a fixing roller 101 and a pressure roller 102 in the direction of an arrow, and the toner T is applied to the recording material P by heating and pressing. Established in

However, since the toner T is tackified by heat, a part of the toner T on the recording material P is partially fixed to the fixing roll as shown in FIG. Therefore, when the next recording material P advances toward the heated fixing roll 101, the recording material P becomes sticky and becomes fixed.
01 is transferred to the next recording material P partially. This process is generally called offset,
When the offset frequently occurs, the fixing device reaches its end of life.

Therefore, in order to prevent this offset, in the prior art, while applying a release agent such as silicone oil to the fixing roll 101, the fixing is performed by heating and pressing with the fixing roll 101 and the pressure roll 102. Is going. There are several methods of applying the release agent to the fixing roll 101. For example, as shown in FIG. 1, the release agent is applied by bringing the web 104 into contact with the fixing roll 101.
In this case, the web is rolled from the web supply roll 109 to the web winding roll 110 at a predetermined speed.

However, in a conventional fixing device,
The surface material 103 of the fixing roll 101 is formed of silicone rubber, fluorine rubber, or the like.
1 is heated, the surface material 1 of the fixing roll 101
03 deteriorates due to heat or if used for a long time, the surface material 103 will be worn due to paper passing and adhesion of dust, etc.
It will hurt. When the surface material 103 is worn or scratched, the toner T adheres to the surface material 103 of the fixing roll 101 even though the release agent is applied to the surface material 103. That is, even if a release agent is applied, a considerable amount of offset occurs.

In order to prevent such an offset, a fixing device described in Japanese Patent Application Laid-Open No. 4-319980 discloses a fixing roll comprising a single-layer roll made of a methyl or methyl vinyl silicone rubber, and a silicone oil comprising methyl With phenyl silicone oil,
The apparatus is provided with a roll polishing means for polishing the surface of the fixing roller.

In this fixing device, the surface of the fixing roller is constantly refreshed by polishing the surface of the fixing roll by the roll polishing means, thereby preventing the offset. In addition, since a single-layer roll of silicone rubber is used, the material of the lower layer is not exposed even when polished, so that the durability is improved.

[0010]

However, in such a conventional fixing device, the roll polishing amount is determined by the particle size of the abrasive, the particle shape, the content in the silicone oil, the fixing of the cleaning web as the roll polishing means. Appropriate conditions vary depending on factors such as the contact pressure against the roll, the contact area, the fiber density of the web, and the material of the roll rubber. It is not easy to find and maintain mutual appropriate values from these many factors. . Then, if the surface of the fixing roll is polished, the roll diameter becomes smaller after long use, which affects these factors and gradually deviates from the appropriate value.

The present invention solves the above-mentioned conventional problems, and does not grind the surface of a fixing member such as a roll.
It is an object of the present invention to stably prevent offset for a long period of time and to improve the durability of the fixing member by reducing the amount of toner attached to the surface of the fixing member.

[0012]

SUMMARY OF THE INVENTION The present invention relates to a fixing member for fixing a toner transferred onto a recording material, the fixing member having a surface coated with a predetermined fluororubber composition and formed into a film. In addition, by providing a predetermined fluororubber composition on the surface of the fixing member, the surface roughness and surface energy of the fixing member are set to predetermined ranges.

The surface roughness of the fixing member is preferably smooth. In the present invention, a filler having a fine particle diameter is used as the filler contained in the fluororubber composition, and the filler is sufficiently dispersed. To make the surface of the fixing member smoother.

By fixing the surface of the fixing member to a smooth shape, when the toner transferred onto the recording material is fixed, the toner contacts the smooth portion of the surface of the fixing member via a release agent. become. After the toner on the recording material passes through the fixing member, the toner adheres to the recording material having a larger contact area than the surface layer of the fixing member. Thus, the offset can be prevented, and the durability of the fixing member can be improved.

The filler to be filled in the fluororubber composition includes a reinforcing agent for strengthening the fluororubber composition and an antacid which prevents the generation of hydrogen fluoride when the fluororubber composition is formed into a film. is there.

Although carbon black is generally used as a reinforcing agent, the present invention proposes to use medium thermal carbon. Medium thermal carbon is produced by contacting natural gas on a solid that has been heated to a high temperature. By setting the average particle diameter of the medium thermal carbon in a state of being dispersed in the fluororubber composition to 5 μm or less, the surface roughness of the fluororubber composition can be made smooth when the fluororubber composition is formed into a film. .

As the antacid, divalent metal oxides and hydroxides such as magnesium oxide, zinc oxide, lead oxide and calcium hydroxide are generally used. By adjusting the average particle size of the antacid in a state of being dispersed in the fluororubber composition to 5 μm or less, it is possible to smooth the surface roughness of the fluororubber composition when the fluororubber composition is formed into a film. .

As a method for measuring the average particle size of the filler particles, a laser diffraction type particle size distribution measuring method is suitable. The particle size of the filler particles is determined by a Fraunhofer diffraction theory for a diffracted light pattern obtained by irradiating the particles with laser light. For the average particle size of the filler particles, a fluororubber composition sample diluted with a solvent and the concentration of the filler particles is adjusted is passed through a measurement cell, the particle size of the passing particles is determined, and the particles corresponding to the obtained particle size are obtained. The particle size where the frequency was the highest was defined as the average particle size.

When fixing the toner transferred onto the recording material, the toner comes into contact with the surface of the fixing member having a predetermined surface energy via the release agent. By setting the surface energy of the fixing member surface within a predetermined range, after the toner on the recording material passes through the fixing member, the toner is more likely to adhere to the recording material than the surface layer of the fixing member. Adhesion can be reduced, offset can be prevented stably for a long period of time, and durability of the fixing member can be improved.

The component in the fluororubber composition which affects the surface energy is a fluororubber component having a polymerized unit based on vinylidene fluoride. In the present invention, the fluorine content in the fluororubber component is set to a predetermined amount. Has proposed that the surface energy of the fluororubber composition be in a suitable range.

The fluorine content in the fluororubber composition can be determined by burning the fluororubber composition at a high temperature and analyzing the components of the generated gas.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is a fluororubber composition used as a surface material of a fixing member for fixing a toner transferred onto a recording material, wherein the surface material is vinylidene fluoride. Composed mainly of a fluororubber (A) having a polymerized unit based on a reinforcing agent (B), an antacid (C), a vulcanizing agent (D), a vulcanizing accelerator (E), and an organic solvent (F). The use of such a fluororubber composition for the surface layer of a fixing member makes it possible to reduce the adhesion of toner to the surface of the fixing member during fixing. , Offset can be prevented.

The invention according to claim 2 is characterized in that the component A is:
It is made of any one of tetrafluoroethylene / vinylidene fluoride / hexafluoropropylene and tetrafluoroethylene / vinylidene fluoride / propylene and vinylidene fluoride / hexafluoropropylene, and has a fluorine content of 60 wt% to 70 wt%. A fluororubber composition according to claim 1, wherein
By selecting such a fluororubber component and the fluorine content, when the fluororubber composition is used for the surface layer of the fixing member, the adhesion of the toner to the surface of the fixing member during fixing can be reduced, and the occurrence of offset can be reduced. Can be prevented.

With a coating composition having a fluorine content of less than 60%, when used for the surface layer of the fixing member, the toner tends to adhere to the surface of the fixing member at the time of fixing, causing offset. Further, in a coating composition having a fluorine content of more than 70%, when used for the surface layer of the fixing member, the release agent is hardly wetted on the surface of the fixing member, so that the toner easily adheres to the surface of the fixing member during fixing, Causes an offset to occur.

According to a third aspect of the present invention, the B component is
It is characterized by medium thermal carbon,
The fluororubber composition according to claim 1, wherein the fluororubber composition has an average particle size of 5 μm or less when dispersed in the fluororubber composition. By setting the average particle size in the material to 5 μm or less, when the fluororubber composition is used for the surface layer of the fixing member, the surface roughness of the fixing member can be made smooth, and the surface of the fixing member can be fixed during fixing. The adhesive force of the toner can be reduced, and the occurrence of offset can be prevented.

Medium thermal carbon has a smaller specific surface area than other carbon blacks such as channel black and furnace black, so that the amount of the fluororubber composition that wets the surface of the carbon black particles is small. When dispersed in the fluororubber composition, a relatively large amount can be filled.

Therefore, by using the medium thermal carbon, when the fluororubber composition is used on the surface of the fixing member, it can function as a reinforcing agent for increasing the strength of the surface material of the fixing member.

The specific surface area of the carbon black particles is determined by an adsorption method. A gas whose molecular cross-sectional area is known, such as carbon dioxide, is adsorbed on the surface of carbon black, and the surface of carbon black is covered with a gas monomolecular film. The specific surface area of carbon black can be determined from the amount of the adsorbed gas.

If the average particle size of the medium carbon black in the fluororubber composition exceeds 5 μm, the surface roughness of the fixing member becomes rough when the fluororubber composition is used for the surface layer of the fixing member, and the fixation time is reduced. In addition, the toner easily adheres to the surface of the fixing member due to the anchor effect, causing an offset.

The invention according to claim 4 is characterized in that the component B is
The fluororubber composition according to any one of claims 1 to 3, wherein the fluororubber composition is contained in an amount of from 20 parts by weight to 40 parts by weight based on 100 parts by weight of the component A.
By filling medium thermal carbon which is a component in such a range, when the fluororubber composition is used for the surface layer of the fixing member, it can have a suitable coating film strength, and when fixing is performed for a long time, Also, the wear of the fixing member surface is small, and the offset can be prevented.

When the amount of the medium thermal carbon is less than 20 parts by weight with respect to 100 parts by weight of the fluororubber composition as the component A, when the fluororubber composition is used for the fixing member surface layer, When the fixing member is softened and fixed for a long period of time, the surface of the fixing member is worn and offset occurs.

When the amount of the medium thermal carbon exceeds 40 parts by weight with respect to 100 parts by weight of the fluororubber composition as the component A, when the fluororubber composition is used for the surface layer of the fixing member, a coating film is not formed. When fixing is performed for a long period of time, the surface of the fixing member is worn and offset occurs.

According to a fifth aspect of the present invention, the component C is
It is composed of a divalent metal oxide or hydroxide and has an average particle size of 5 μm in a state of being dispersed in the fluororubber composition.
m or less, wherein the fluororubber composition according to any one of claims 1 to 4 is characterized in that when the fluororubber composition is cured by using such a compound, Generation of hydrogen fluoride can be prevented, and the curing of the fluororubber composition can be promoted. In order to sufficiently cure the fluororubber composition, a fixing member surface layer having excellent durability can be obtained.

Further, when such a compound is selected and the average particle size in the fluororubber composition is set to 5 μm or less, when the fluororubber composition is used for the surface layer of the fixing member, the surface roughness of the fixing member is reduced. Can be smoothed, the adhesion of the toner to the surface of the fixing member at the time of fixing can be reduced, and the occurrence of offset can be prevented.

The invention according to claim 6 is characterized in that the component C is
The fluororubber composition according to any one of claims 1 to 5, wherein the fluororubber composition is contained in an amount of 5 to 20 parts by weight based on 100 parts by weight of the component A. Fluororubber composition 1 wherein the amount of certain C component is A component
If the amount is less than 5 parts by weight with respect to 00 parts by weight, when the fluororubber composition is used for the surface layer of the fixing member, the fluororubber composition is not sufficiently cured, the coating film becomes soft, and the fixing is performed for a long time. The surface of the fixing member wears out,
Generate an offset.

When the amount of the antacid C component exceeds 20 parts by weight with respect to 100 parts by weight of the fluororubber composition A as the component, when the fluororubber composition is used for the surface layer of the fixing member, When the coating film becomes brittle, and the fixing is performed for a long period of time, the surface of the fixing member is worn and offset occurs.

The invention according to claim 7, wherein the D component is:
The fluororubber composition according to any one of claims 1 to 6, wherein the composition is a polyol-based or amine-based vulcanizing agent, and a D component that is a vulcanizing agent is used. Thereby, the fluororubber composition can be sufficiently cured, and a fixing member surface layer having excellent durability can be obtained.

As the polyol-based vulcanizing agent, any of the known compounds used for vulcanizing a copolymer with a polyol can be used, and among them, aromatic hydroxy compounds such as bisphenol AF, bisphenol A and hydroquinone are preferred.

As the amine vulcanizing agent, any of the known compounds used for amine vulcanization of vinylidene fluoride copolymers can be used, and examples thereof include hexamethylene diamine, hexamethylene diamine dicarbamate, and disinnamylidene hexamethylene diamine. Is preferred.

According to the invention described in claim 8, the D component is:
The fluororubber composition according to any one of claims 1 to 7, wherein the fluororubber composition is contained in an amount of 0.5 to 5 parts by weight based on 100 parts by weight of the component A. By using the component D, which is an amine-based vulcanizing agent, in such a range, the fluororubber composition can be sufficiently cured, and a fixing member surface layer having excellent durability can be obtained.

If the amount of the component D as the vulcanizing agent is less than 0.5 part by weight with respect to 100 parts by weight of the fluororubber composition as the component A, the fluororubber composition does not cure sufficiently and the fixing member It cannot function as a surface layer.

When the amount of the component D as the vulcanizing agent exceeds 5 parts by weight based on 100 parts by weight of the fluororubber composition as the component A, when the fluororubber composition is used for the surface layer of the fixing member, When the coating film becomes brittle, and the fixing is performed for a long period of time, the surface of the fixing member is worn and offset occurs.

According to a ninth aspect of the present invention, the E component is
The fluororubber composition according to any one of claims 1 to 8, which is an organic quaternary phosphonium salt or an organic quaternary ammonium salt, wherein the E component as a vulcanization accelerator is used. When used, the curing of the fluororubber composition can be accelerated, and a fixing member surface layer having excellent durability can be obtained.

As the unsaturated polyfunctional compound used as the vulcanization accelerator, triallyl isocyanurate, triallyl cyanurate, trimethylolpropane trimethacrylate, polybutadiene and the like are preferable.

Examples of the organic base used as the vulcanization accelerator include tetrabutylammonium hydrogen sulfate, tetrabutylammonium bromide, 8-benzyl-1,8-diazapicyclo [5.4.0. ] Undec-7-enium chloride, p-toluenesulfonsan 1,8-diazabicyclo [5.4.0] undec-7-enium, tetrabutylphosphonium chloride, trioctylmethylphosphonium chloride, triphenylbenzylphosphonium chloride, 1 , 8-diazabicyclo [5.4.0] undec-7-ene, pyridine, tributylamine, triphenylphosphine, tributylphosphite and the like are preferred.

The invention according to claim 10 is characterized in that the E component is contained in an amount of 0.5 to 5 parts by weight based on 100 parts by weight of the A component. The fluororubber composition according to item 1, wherein the fluoroelastomer composition can be sufficiently cured by using the E component which is a vulcanization accelerator in such a range, and has excellent durability. A fixing member surface layer can be obtained.

When the amount of the component E as the vulcanization accelerator is less than 0.5 part by weight based on 100 parts by weight of the fluororubber composition as the component A, the fluororubber composition is not sufficiently cured,
It cannot function as the surface layer of the fixing member.

When the amount of the component E as the vulcanization accelerator exceeds 5 parts by weight with respect to 100 parts by weight of the fluororubber composition as the component A, when the fluororubber composition is used for the surface layer of the fixing member. In addition, the coating film becomes brittle, and when the fixing is performed for a long period of time, the surface of the fixing member is worn and offset occurs.

The invention according to claim 11 is characterized in that the F component is an organic solvent capable of dissolving or dispersing the rubber compound consisting of the components A to E. The fluororubber composition is used, and the solvent of the F component used in the present invention is used for coating the fluororubber composition. The type and amount of the F component, which is an organic solvent, are not particularly limited, and are appropriately selected according to the coating method. The F component which is an organic solvent includes A, B,
It is preferable to dissolve each component of C, D, and E, but it is also possible to disperse a part of each component.

According to a twelfth aspect of the present invention, there is provided a fixing member for fixing a toner transferred onto a recording material, wherein the fluororubber composition according to any one of the first to eleventh aspects is provided on the surface of the fixing member. It is a fixing member characterized by providing a dried and coated film, coating such a fluoro rubber composition on the surface of the fixing member, drying and curing under predetermined conditions, A fixing member having excellent durability can be obtained.

According to a thirteenth aspect of the present invention, in the fixing member according to the twelfth aspect, the surface roughness Rz of the fixing member is 5 μm or less. The surface roughness Rz of the fixing member can be reduced to 5 μm or less by providing a coating obtained by applying and drying a fluororubber composition containing F as a component.

The surface roughness Rz is determined according to JIS Handbook 34.
A straight line that is parallel to the average line and does not intersect the cross-sectional curve at the portion extracted by the reference length from the cross-sectional curve obtained by a contact type surface roughness meter, etc. Means the difference between the average value of the altitudes of the highest to fifth peaks measured in the direction of the vertical magnification and the average value of the altitudes of the valley bottoms from the deepest to the fifth expressed in micrometers.

By setting the surface roughness Rz of the fixing member to 5 μm or less, the surface roughness of the fixing member can be made smooth, and the adhesion of toner to the fixing member surface during fixing can be reduced. , Offset can be prevented.

If the surface roughness Rz of the fixing member exceeds 5 μm, the surface roughness of the fixing member becomes rough, and at the time of fixing, toner tends to adhere to the surface of the fixing member due to an anchor effect, thereby causing offset.

According to a fourteenth aspect of the present invention, the fixing member has a surface energy of 15 dyn / cm to 20 dyn / cm.
The fixing member according to claim 12 or 13, wherein the A
The surface energy of the fixing member can be changed from 15 dyn / cm to 20 dyn / cm by providing a coating obtained by applying and drying a fluororubber composition containing F as a constituent component, thereby providing a fixing member having excellent durability. Obtainable.

The surface energy of the fixing member is obtained as the sum of the dispersion term and the polarity term on the fixing member surface. The dispersion term and the polarity term on the surface of the fixing member are determined by dropping two types of liquids, for example, water and liquid paraffin, which are known in advance in terms of the dispersion term and the polar term, on the fixing member surface drop by drop. Is obtained by calculating the angle of contact with the surface of the fixing member, and substituting the obtained contact angle into the extended Fowkes equation.

In a state where the solid and the liquid are in contact with each other, the balance of the force is maintained between the surface energy (γs) of the solid, the surface tension (γl) of the liquid, and the interfacial tension (γsl) of the solid and liquid. . This relationship is expressed by equation (1), where θ is the angle at which the solid-liquid contacts.

Γs = γsl + γl ^cos θ Equation (1) The surface tension (γl) of a liquid is the sum of its dispersion term (γl ^d ) and polar term (γl ^p ), and the surface energy (γs) of a solid is Its variance term (γs ^d ) and polarity term (γs ^p )
Expressed as the sum of

On the other hand, the expression of the extended Fowkes is given by the following expression (2).
It is represented by

[0060] ^{γsl = γs + γl- (γl d} γs d) 1/2 - by (γl ^p γs ^{p) 1/2} Equation (2) These relations are determined surface energy of the fixing member.

By using a fixing member having such a surface energy, the adhesion of the toner to the fixing member surface during fixing can be reduced, and the occurrence of offset can be prevented.

The surface energy of the fixing member is 15 dyn /
If it is less than 1 cm, the release agent is less likely to be wet on the surface of the fixing member, so that the toner tends to adhere to the surface of the fixing member at the time of fixing, thereby causing offset.

The surface energy of the fixing member is 20 d
If it exceeds yn / cm, the toner tends to adhere to the surface of the fixing member at the time of fixing, causing an offset.

According to a fifteenth aspect of the present invention, there is provided a fixing method for fixing a toner transferred onto a recording material using a fixing member, wherein the fixing member is provided on a surface of the fixing member. The fixing method is characterized in that the fixing is carried out by using a fixing member provided with a coating obtained by applying and drying the fluororubber composition according to the description. By using such a fixing method, the durability is excellent. A fixing member can be obtained.

According to a sixteenth aspect of the present invention, there is provided a fixing device including a fixing member for fixing the toner transferred onto the recording material, wherein the fixing member is provided on a surface of the fixing device. And a fixing device having excellent durability can be obtained.

Hereinafter, embodiments of the present invention will be described.

FIG. 1 is a sectional view of a fixing device according to an embodiment of the present invention, and shows a fixing device provided with a fixing roll having a surface material made of a predetermined fluororubber composition on the surface of a fixing member. . Details of members constituting the fixing device will be described below.

As shown in FIG. 1, the fixing device includes a recording material P
Fixing roll 101 for fixing toner T transferred thereon
, A pressure roll 102 opposed thereto, and a fixing roll 1
And a web 104 to which a release agent such as silicone oil is applied in order to prevent toner from adhering to the surface of the toner.

The fixing roll 101 is made of an aluminum core 10.
5a is coated with a silicone rubber elastic body 106 to a thickness of 2 mm, the surface thereof is polished, and then a surface layer material 103 made of the fluororubber composition of the present invention is applied on the silicone rubber elastic body 106, dried, and dried. The surface is formed to have a diameter of about 40 mm, a surface roughness Rz of 5 μm or less, and a surface energy of 15 dyn / cm to 20 dyn / cm.
In the range. A heater 107 is provided in the core 105 as a heating source, and controls the surface temperature of the fixing roll 101 to be maintained at about 140 to 170 ° C.

The pressure roll 102 has a silicone rubber elastic body 106 on a stainless steel core 105b of about 2 mm.
Thickly, and three layers of FLC (fluororesin) 111
It is coated to a thickness of 0 μm and formed into an outer diameter of about 40 mm, similarly to the fixing roll 101.

The web 104 impregnated with a release agent such as silicone oil has a thickness of 60 μm × a width of 220 mm × a PTFE (fluororesin) bonded to a woven polyester cloth.
It is 800 mm long, and is wound at a predetermined speed from the web supply roll 109 to the web winding roll 110. At this time, the fixing roller 10 is pressed by the web pressing roller 108 to make contact with the fixing roller 101, so that the fixing roller 10
1 is coated with a release agent impregnated in the web 104. As described above, the toner T is prevented from adhering to the fixing roll 101 by performing the fixing while applying the release agent to the fixing roll 101.

As the surface material 103 of the fixing roll, a film formed by applying a predetermined fluororubber composition and drying it for the purpose of making it difficult for the toner T to adhere to the surface is used.

The fluororubber composition comprises a fluororubber (A) having polymerized units based on vinylidene fluoride, a reinforcing agent (B), an antacid (C), a vulcanizing agent (D), a vulcanization accelerator ( E) and an organic solvent (F).

The component A is composed of any of tetrafluoroethylene / vinylidene fluoride / hexafluoropropylene and tetrafluoroethylene / vinylidene fluoride / propylene and vinylidene fluoride / hexafluoropropylene, and has a fluorine content of 60 wt% to 70 wt%. %, The surface energy of the surface material 103 is reduced to 15%.
It can be in the range of dyn / cm to 20 dyn / cm, and a fixing member having excellent toner releasing property can be obtained.

The component B is selected from medium and thermal carbon, the average particle size of the component dispersed in the fluororubber composition is 5 μm or less, and the amount of the component B is 20 parts by weight per 100 parts by weight of the component A. By setting the amount in the range of 40 parts by weight to 40 parts by weight, a smooth surface having a surface roughness Rz of the fixing roll surface material 103 of 5 μm or less can be obtained, and a fixing film having a film strength enough to withstand long-time fixing. A member can be obtained.

The component C is selected from divalent metal oxides and hydroxides, the average particle diameter of the component dispersed in the fluororubber composition is 5 μm or less, and the amount of the component C is A component. By setting the range from 5 parts by weight to 20 parts by weight with respect to 100 parts by weight, a smooth surface having a surface roughness Rz of the fixing roll surface material 103 of 5 μm or less can be obtained. It is possible to obtain a fixing member having a film strength that can withstand the above.

The component D is selected from a polyol-based or amine-based vulcanizing agent.
By setting the amount in the range of 0.5 parts by weight to 5 parts by weight with respect to 0 parts by weight, the surface material 103 of the fixing roll can be sufficiently cured, and a fixing member having a film strength enough to withstand long-term fixing can be obtained. Can be.

The component E is selected from organic quaternary phosphonium salts or organic quaternary ammonium salts, and the amount of the component E is in the range of 0.5 to 5 parts by weight per 100 parts by weight of the component A. Thus, the fixing roll surface material 10
3 can be sufficiently cured, and a fixing member having a film strength enough to withstand long-time fixing can be obtained.

In order to achieve the object of making it difficult for the toner T to adhere to the surface of the surface material 103 of the fixing roll, it is necessary to select a fluorine rubber coating composition suitable for the surface material.

By providing the above-described fluoro rubber composition on the surface of the fixing member, when the toner T transferred onto the recording material P is fixed, the toner is applied to the surface of the fixing member 103 via the T release agent. After the toner T on the recording material P passes through the fixing member, the toner T adheres to the recording material P having a larger contact area than the surface of the fixing member. Adhesion can be reduced, offset can be prevented stably for a long period of time, and durability of the fixing member can be improved.

The effect of providing a predetermined fluororubber composition on the surface layer of a fixing roll as a fixing member will be described.

FIG. 2 is a partially enlarged view showing a state of fixing an image in a fixing device according to an embodiment of the present invention.
3 and 4 are partially enlarged views showing a state of image fixing in a conventional fixing device.

FIG. 3 shows a state in which the toner T on the recording material P is fixed when the surface energy of the surface material 103a of the fixing roll exceeds 20 dyn / cm. When the toner T passes under the fixing roll, it is crushed by the heat and pressure of the fixing roll via the release agent.
After passing under the fixing roll, most of the toner is fixed on the recording material P, but part of the toner is fixed to the surface material 10 of the fixing roll.
Attaches to 3a. When the toner T attached to the surface material 103a of the fixing roll contacts the recording material P next time, a part of the toner T adheres to the recording material P and causes an offset.

FIG. 3 also shows a state in which the toner T on the recording material P is fixed when the surface energy of the surface material 103b of the fixing roll is less than 15 dyn / cm. A release agent such as silicone oil is applied to the surface of the surface material 103b. However, since the surface energy of the surface material 103b is low, the release agent cannot spread uniformly on the surface of the surface material 103b. On the surface of the surface material 103b, there are portions where the release agent is applied and portions where the release agent is not applied. In this case, when fixing the toner transferred onto the recording material P, the toner T comes into contact with a portion of the surface of the surface material 103b where the release agent is applied and a portion where the release agent is not applied. After the toner T on the recording material P has passed through the fixing member,
The toner T is fixed on the recording material P in the portion where the release agent is applied on the surface of the surface material 103b, but the toner T is fixed on the recording material P in the portion where the release agent is not applied. Without adhering to the surface layer material 103b. When the toner T adheres to the surface material 103b of the fixing roll next time, when the toner T contacts the recording material P, a part thereof adheres to the recording material P and causes an offset.

FIG. 2 shows that the surface energy of the surface material 103c of the fixing roll is from 15 dyn / cm to 20 dyn / c.
3 shows a state in which the toner T on the recording material P is fixed when it is within the range of m. A release agent such as silicone oil is applied to the surface of the surface layer material 103c.
3c spreads evenly on the surface. When fixing the toner transferred onto the recording material P, the toner T
It comes into contact with the surface of the surface material 103c via the release agent on the c surface. After the toner T on the recording material P passes through the fixing member, the toner T is satisfactorily fixed on the recording material P.

FIG. 4 shows a state in which the toner T on the recording material P is fixed when the surface roughness Rz of the surface material 103d of the fixing roll exceeds 5 μm. The average particle size of the toner T is about 10 μm to 15 μm, and the toner T on the recording material comes into contact with the surface of the surface material 103 d via a release agent. When the toner T passes under the fixing roll, it is crushed by the heat and pressure of the fixing roll.
Is in contact with the surface of the rough surface layer material 103d exceeding 5 μm, a part of the toner T adheres to the surface layer material 103d by an anchor effect. When the toner T attached to the surface material 103d of the fixing roll contacts the recording material P next time,
A part thereof adheres to the recording material P to cause an offset.

When the surface roughness Rz of the surface material 103e of the fixing roll is 5 μm or less, the toner T is crushed by the heat and pressure of the fixing roll when passing under the fixing roll. After the toner T on the recording material P passes through the fixing member because it contacts the surface of the smooth surface layer material 103d of 5 μm or less, the toner T is well fixed on the recording material P. This is shown in FIG.

According to the embodiment of the present invention described above, the surface energy of the surface layer of the fixing member is changed from 15 dyn / cm to 2 dyn / cm.
0 dyn / cm and the surface roughness Rz of the fixing member surface layer is set to 5 μm or less, so that when the toner transferred onto the recording material is fixed, And the surface of the fixing member having a smooth surface roughness is brought into contact. After the toner on the recording material passes through the fixing member, the toner adheres to the recording material having a larger contact area than the surface layer of the fixing member. Thus, the offset can be prevented, and the durability of the fixing member can be improved.

[0089]

Next, specific examples of the present invention will be described.

A fluororubber composition having the following composition was prepared as a surface material of the fixing roll.

Fluororubber A: ternary fluororubber (vinylidene fluoride, tetrafluoroethylene, hexafluoropropylene copolymer) (100 parts by weight) Reinforcing agent B: Medium thermal carbon (X1 parts by weight) Antacid C: Magnesium oxide (X2 parts by weight) Vulcanizing agent D: Bisphenol AF (X3 parts by weight) Vulcanization accelerator E: Tetrabutylammonium hydrogen sulfate (X4 parts by weight) Organic solvent F: Butyl acetate (400 parts by weight) Surface layer material The method for preparing the paint for use is described below. Three types of fluororubbers A1, A2, and A3 having a ternary system composed of vinylidene fluoride, tetrafluoroethylene, and hexafluoropropylene as constituent units were prepared by an emulsion polymerization method. When the fluorine content of the produced fluororubber composition was measured, it was 60% for A1, 65% for A2, and 70% for A3.
%Met. Further, a fluororubber A4 containing vinylidene fluoride, tetrafluoroethylene, and propylene as constituent units was produced by an emulsion polymerization method. The fluorine content of the prepared fluororubber composition was 55% as measured.

100 parts by weight of any one of the fluororubbers A1 to A4, X1 part by weight of medium thermal carbon (N-907 manufactured by Huber) as a reinforcing agent B, and magnesium oxide (Kyowa Chemical Co., Ltd.) as an antacid C X2 parts by weight of Kyowa Mag 150), X3 parts by weight of bisphenol AF as a vulcanizing agent D, and X4 parts by weight of tetrabutylammonium hydrogen sulfate as a vulcanizing accelerator E were mixed and dispersed by a roll mill disperser. By changing the dispersion time when performing the roll mill dispersion, a mixture having different filler particle sizes was prepared. Next, the obtained mixture was dissolved in 400 parts by weight of butyl acetate as the organic solvent F to obtain a fluororubber composition.

The method for forming the surface material of the fixing roll will be described below. First, a silicone rubber elastic body is molded on a core metal of a fixing roll, and the surface of the molded silicone rubber elastic body is polished and washed. Next, the fluororubber composition is spray-coated on the surface of the silicone rubber elastic body,
The butyl acetate, which is an organic solvent, is scattered by being left for a time. Next, this was dried in an 80 ° C. oven for 2 hours, and further dried in a 200 ° C. oven for 1 hour to obtain a target surface layer material.

A fixing test was performed using the fixing roll thus prepared. The test was performed for the examples, the conventional technology, and the comparative example, and the superiority of the test results was evaluated by the number of fixed sheets until an offset occurred. However, the maximum number of fixing test sheets was 60 k sheets.

As a test printer, a color laser printer manufactured by our company was used. The fixing test conditions were as follows: A4 letter size NIP paper (manufactured by Kobayashi Recording Paper Co., Ltd.) was used as the recording material, fixing temperature was 160 ° C. (fixing roll surface temperature), and fixing speed was 4 p
pm (4 sheets per minute). The toner used was a polyester resin-based resin having an average particle diameter of 12 μm (manufactured by Kao Corporation), and the printing pattern was a 5% random pattern. Further, as a release agent, a viscosity of 10 at 25 ° C.
00 cps amino-modified dimethylpolysiloxane (Shin-Etsu Chemical Co., Ltd.) was used.

The results of the fixability test for the examples and comparative examples are described below.

Example 1 A fluororubber composition was prepared using a fluororubber composition A1 having a fluorine content of 60%. The filler contained in the prepared paint had an average particle size of 1 μm, the cured film had a surface energy of 18 dyn / cm, and a surface roughness Rz of 3 μm. In the fixing test, no occurrence of offset was observed after fixing 60k sheets.

Example 2 A fluororubber composition was prepared using a fluororubber composition A2 having a fluorine content of 65%. The filler contained in the prepared paint had an average particle size of 1 μm, the cured film had a surface energy of 17 dyn / cm, and a surface roughness Rz of 3 μm. In the fixing test, no occurrence of offset was observed after fixing 60k sheets.

Example 3 A fluororubber composition was prepared using a fluororubber composition A3 having a fluorine content of 70%. The filler contained in the prepared paint had an average particle size of 1 μm, the cured film had a surface energy of 15 dyn / cm, and a surface roughness Rz of 3 μm. In the fixing test, no occurrence of offset was observed after fixing 60k sheets.

Example 4 A fluororubber composition was prepared by using a fluororubber composition A2 having a fluorine content of 65% and blending 20 parts by weight of a reinforcing agent B. The filler contained in the prepared paint had an average particle size of 1 μm, the cured film had a surface energy of 16 dyn / cm, and a surface roughness Rz of 3 μm. In the fixing test, no occurrence of offset was observed after fixing 60k sheets.

Example 5 A fluororubber composition was prepared by using a fluororubber composition A2 having a fluorine content of 65% and incorporating 40 parts by weight of a reinforcing agent B. The filler contained in the prepared paint had an average particle size of 1 μm, the cured film had a surface energy of 18 dyn / cm, and a surface roughness Rz of 3 μm. In the fixing test, no occurrence of offset was observed after fixing 60k sheets.

Example 6 A fluororubber composition was prepared by using a fluororubber composition A2 having a fluorine content of 65% and blending 5 parts by weight of an antacid C. The filler contained in the prepared paint had an average particle size of 1 μm, the cured film had a surface energy of 16 dyn / cm, and a surface roughness Rz of 3 μm. In the fixing test, no occurrence of offset was observed after fixing 60k sheets.

Example 7 A fluororubber composition was prepared by using a fluororubber composition A2 having a fluorine content of 65% and blending 20 parts by weight of an antacid C. The filler contained in the prepared paint had an average particle size of 1 μm, the cured film had a surface energy of 20 dyn / cm, and a surface roughness Rz of 4 μm. In the fixing test, no occurrence of offset was observed after fixing 60k sheets.

Example 8 A fluororubber composition was prepared using a fluororubber composition A2 having a fluorine content of 65%.
The dispersion time in a roll mill disperser was shortened during production. The filler contained in the prepared paint had an average particle size of 3 μm, the cured film had a surface energy of 17 dyn / cm, and a surface roughness Rz of 5 μm. In the fixing test, no occurrence of offset was observed after fixing 60k sheets.

Example 9 A fluororubber composition was prepared by using a fluororubber composition A2 having a fluorine content of 65% and blending 0.5 part by weight of a vulcanizing agent D. The average particle diameter of the filler contained in the prepared paint is 1 μm, the surface energy of the cured film is 17 dyn / cm, and the surface roughness Rz is 3 μm.
Met. In the fixing test, no occurrence of offset was observed after fixing 60k sheets.

Example 10 A fluororubber composition was prepared by using a fluororubber composition A2 having a fluorine content of 65% and blending 5 parts by weight of a vulcanizing agent D. The filler contained in the prepared paint had an average particle size of 1 μm, the cured film had a surface energy of 17 dyn / cm, and a surface roughness Rz of 3 μm. In the fixing test, no occurrence of offset was observed after fixing 60k sheets.

(Example 11) A fluororubber composition was prepared by using a fluororubber composition A2 having a fluorine content of 65% and blending 0.5 parts by weight of a vulcanization accelerator E. The filler contained in the prepared paint had an average particle size of 1 μm, the cured film had a surface energy of 17 dyn / cm, and a surface roughness Rz of 3 μm. In the fixing test, no occurrence of offset was observed after fixing 60k sheets.

Example 12 A fluororubber composition was prepared by using a fluororubber composition A2 having a fluorine content of 65% and blending 5 parts by weight of a vulcanization accelerator E. The average particle diameter of the filler contained in the prepared paint is 1 μm, the surface energy of the cured film is 17 dyn / cm, and the surface roughness Rz is 3 μm.
m. In the fixing test, no occurrence of offset was observed after fixing 60k sheets.

Comparative Example 1 A fluororubber composition was prepared using a fluororubber composition A4 having a fluorine content of 55%.
The average particle size of the filler contained in the prepared paint is 1 μm, the surface energy of the cured film is 23 dyn / cm,
The surface roughness Rz was 3 μm. In the fixing test, an offset was generated after fixing 10k sheets.

Comparative Example 2 A fluororubber composition was prepared by using a fluororubber composition A2 having a fluorine content of 65% and blending 15 parts by weight of a reinforcing agent B. The filler contained in the prepared paint had an average particle size of 1 μm, the cured film had a surface energy of 17 dyn / cm, and a surface roughness Rz of 3 μm. In the fixing test, an offset was generated after fixing 30k sheets.

Comparative Example 3 Using a fluororubber composition A2 having a fluorine content of 65%, a fluororubber composition containing 45 parts by weight of a reinforcing agent B was prepared. The average particle size of the filler contained in the prepared paint was 1 μm, the surface energy of the cured film was 19 dyn / cm, and the surface roughness Rz was 3 μm. In the fixing test, an offset was generated after fixing 15k sheets.

Comparative Example 4 A fluororubber composition was prepared using a fluororubber composition A2 having a fluorine content of 65%.
The dispersion time in a roll mill disperser was shortened during production. The filler contained in the prepared paint had an average particle size of 8 μm, the cured film had a surface energy of 17 dyn / cm, and a surface roughness Rz of 12 μm. In the fixing test, an offset was generated after fixing 5k sheets.

Comparative Example 5 A fluororubber composition was prepared by using a fluororubber composition A2 having a fluorine content of 65% and blending 3 parts by weight of an antacid C. The filler contained in the prepared paint had an average particle size of 1 μm, the cured film had a surface energy of 17 dyn / cm, and a surface roughness Rz of 3 μm. In the fixing test, an offset was generated after fixing 15k sheets.

Comparative Example 6 A fluororubber composition was prepared by using the fluororubber composition A2 having a fluorine content of 65% and incorporating 25 parts by weight of the antacid C. The filler contained in the prepared paint had an average particle size of 2 μm, the cured film had a surface energy of 17 dyn / cm, and a surface roughness Rz of 4 μm. In the fixing test, an offset was generated after fixing 30k sheets.

Comparative Example 7 A fluororubber composition was prepared by using a fluororubber composition A2 having a fluorine content of 65% and blending 0.2 parts by weight of a vulcanizing agent D. The average particle size of the filler contained in the prepared paint is 1 μm, the surface energy of the cured film is 16 dyn / cm, and the surface roughness Rz is 3 μm.
Met. In the fixing test, an offset was generated after fixing 15k sheets.

Comparative Example 8 Using a fluororubber composition A2 having a fluorine content of 65%, a fluororubber composition containing 7 parts by weight of a vulcanizing agent D was prepared. The filler contained in the prepared paint had an average particle size of 1 μm, the cured film had a surface energy of 18 dyn / cm, and a surface roughness Rz of 3 μm. In the fixing test, an offset was generated after fixing 40k sheets.

(Comparative Example 9) A fluororubber composition was prepared by using a fluororubber composition A2 having a fluorine content of 65% and blending 0.2 parts by weight of a vulcanization accelerator E. The average particle size of the filler contained in the prepared paint is 1 μm, the surface energy of the cured film is 17 dyn / cm, and the surface roughness Rz is 3
μm. In the fixing test, an offset was generated after fixing 10k sheets.

Comparative Example 10 Using a fluororubber composition A2 having a fluorine content of 65%, a fluororubber composition containing 7 parts by weight of a vulcanization accelerator E was prepared. The average particle diameter of the filler contained in the prepared paint is 1 μm, the surface energy of the cured film is 17 dyn / cm, and the surface roughness Rz is 3 μm.
m. In the fixing test, an offset was generated after fixing 45k sheets.

The composition and properties of the fluororubber composition used in the examples, the characteristics of the cured film of the fluororubber composition, and the test results are summarized in (Table 1) and (Table 2).

[0120]

[Table 1]

[0121]

[Table 2]

The compositions and properties of the fluororubber compositions used in the comparative examples, the characteristics of the cured films of the fluororubber compositions, and the test results are summarized in Tables 3 and 4.

[0123]

[Table 3]

[0124]

[Table 4]

[0125]

According to the present invention, the following effects can be obtained. (1) According to the first aspect of the invention, when the toner transferred onto the recording material is fixed, the adhesion of the toner to the fixing member surface can be reduced, the occurrence of offset can be prevented, and the fixing roller Durability can be improved. (2) According to the second aspect of the invention, when the toner transferred onto the recording material is fixed, the releasability of the surface of the fixing member is improved, and the adhesion of the toner to the surface of the fixing member is reduced. Thus, the occurrence of offset can be prevented, and the durability of the fixing roller can be improved. (3) According to the third aspect of the present invention, the surface of the fixing member is given strength and the surface roughness of the fixing member can be made smooth by reducing the average particle size of the reinforcing agent to be filled. When fixing the toner transferred onto the material, the toner selectively adheres to the recording material with a rough surface, preventing the occurrence of offset for a long period of time and ensuring the durability of the fixing roller. Performance can be improved. (4) According to the fourth aspect of the invention, it is possible to impart appropriate strength to the surface material of the fixing member and to smooth the surface roughness of the fixing member, and to fix the toner transferred onto the recording material. In addition, the toner selectively adheres to the recording material having a rough surface, so that the occurrence of offset is stably prevented for a long time, and the durability of the fixing roller can be improved. (5) According to the fifth aspect of the present invention, when drying the surface layer material of the fixing member, the surface layer material can be sufficiently cured, imparting strength to the surface layer material of the fixing member, and the average particle size of the reinforcing agent to be filled. By reducing the surface roughness, the surface roughness of the fixing member can be made smooth, and when the toner transferred onto the recording material is fixed, the toner selectively adheres to the recording material having the coarser surface roughness. As a result, the occurrence of offset is stably prevented for a long period of time, and the durability of the fixing roller can be improved. (6) According to the sixth aspect of the present invention, when drying the surface layer material of the fixing member, the surface layer material can be sufficiently cured, imparting strength to the surface layer material of the fixing member, and the average particle size of the reinforcing agent to be filled. By reducing the surface roughness, the surface roughness of the fixing member can be made smooth, and when the toner transferred onto the recording material is fixed, the toner selectively adheres to the recording material having the coarser surface roughness. As a result, the occurrence of offset is stably prevented for a long period of time, and the durability of the fixing roller can be improved. (7) According to the seventh aspect of the present invention, when drying the surface material of the fixing member, the surface layer material can be sufficiently cured, giving strength to the surface material of the fixing member and stably preventing the occurrence of offset for a long period of time. Thus, the durability of the fixing roller can be improved. (8) According to the invention of claim 8, when the surface material of the fixing member is dried, the surface material can be sufficiently hardened, the strength is given to the surface material of the fixing member, and the occurrence of offset is stably prevented for a long time. Thus, the durability of the fixing roller can be improved. (9) According to the ninth aspect of the present invention, when the surface material of the fixing member is dried, the surface material can be sufficiently cured, the strength is given to the surface material of the fixing member, and the occurrence of offset is stably prevented for a long period of time. Thus, the durability of the fixing roller can be improved. (10) According to the tenth aspect of the present invention, when drying the surface material of the fixing member, the surface layer material can be sufficiently cured, giving strength to the surface material of the fixing member, and stably preventing the occurrence of offset for a long time. Thus, the durability of the fixing roller can be improved. (11) According to the invention of claim 11, when applying the surface material of the fixing member, the coating composition is given an appropriate viscosity,
The surface roughness of the surface material of the fixing member can be smoothly finished, and when used as a fixing member, the occurrence of offset can be stably prevented for a long time, and the durability of the fixing roller can be improved. (12) According to the twelfth aspect of the invention, when the toner transferred onto the recording material is fixed, the adhesion of the toner to the surface of the fixing member can be reduced, the occurrence of offset can be prevented, and the fixing roller Durability can be improved. (13) According to the invention of (13), the surface roughness of the fixing member can be made smoother, and when the toner transferred onto the recording material is fixed, the toner is moved toward the recording material having the coarser surface roughness. The fixing roller is selectively adhered, and the occurrence of offset is stably prevented for a long period of time, so that the durability of the fixing roller can be improved. (14) According to the fourteenth aspect, the releasability of the surface of the fixing member can be improved, and the wettability of the release oil can be improved, so that the toner transferred onto the recording material can be fixed. , The toner selectively adheres to the recording material, and the occurrence of offset is stably prevented for a long time.
The durability of the fixing roller can be improved. (15) According to the invention, when the toner transferred onto the recording material is fixed, the adhesive force of the toner to the fixing member surface can be reduced, the occurrence of offset can be prevented, and the fixing roller A fixing method for improving durability can be provided. (16) According to the invention of (16), when the toner transferred onto the recording material is fixed, the adhesion of the toner to the fixing member surface can be reduced, the occurrence of offset can be prevented, and the fixing roller A fixing device that improves durability can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view of a fixing device according to an embodiment of the present invention.

FIG. 2 is a partially enlarged view showing an image fixing state in the fixing device according to the embodiment of the present invention;

FIG. 3 is a partially enlarged view showing a state of image fixing in a conventional fixing device.

FIG. 4 is a partially enlarged view showing a state of image fixing in a conventional fixing device.

[Explanation of symbols]

Reference Signs List 101 fixing roll 102 pressure roll 103, 103a, 103b, 103c fixing roll surface layer 104 web 105a, 105b core metal 106 rubber elastic body 107 heater 108 web pressing roll 109 web supply roll 110 web take-up roll 111 pressure roll surface layer

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) // (C08K 13/02 (C08K 13/02 3:22 3:22 5:13 5:13 5:16 5:16 5:49 5:49 3:04) 3:04) (72) Inventor Hirofumi Kama 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Hiroyuki Noda Kadoma, Osaka Pref. 1006, Kadoma Matsushita Electric Industrial Co., Ltd. DE157 EJ038 EN038 EN108 EN118 EN138 EW178 FD016 FD037 FD148

Claims (16)

[Claims] 1. A fluororubber composition used as a surface material of a fixing member for fixing a toner transferred onto a recording material, comprising:
The surface layer material is mainly composed of a fluororubber (A) having polymerized units based on vinylidene fluoride, and a reinforcing agent (B), an antacid (C), a vulcanizing agent (D), and a vulcanization accelerator (E) A fluororubber composition comprising an organic solvent (F). 2. The composition according to claim 1, wherein the component A is tetrafluoroethylene /
It is composed of any one of vinylidene fluoride / hexafluoropropylene and tetrafluoroethylene / vinylidene fluoride / propylene and vinylidene fluoride / hexafluoropropylene, and has a fluorine content of 60% by weight to 70%.
The fluororubber composition according to claim 1, wherein the content is wt%. 3. The composition according to claim 1, wherein the B component is medium thermal carbon, and has an average particle size of 5 μm or less when dispersed in the fluororubber composition. Fluoro rubber composition. 4. The fluororubber composition according to claim 1, wherein the component B is contained in an amount of 20 to 40 parts by weight based on 100 parts by weight of the component A. . 5. The method according to claim 1, wherein the C component comprises a divalent metal oxide or hydroxide and has an average particle size of 5 μm or less when dispersed in the fluororubber composition. Item 5. The fluororubber composition according to any one of Items 1 to 4. 6. The fluororubber composition according to claim 1, wherein the C component is contained in an amount of 5 to 20 parts by weight based on 100 parts by weight of the A component. . 7. The fluororubber composition according to claim 1, wherein the component D is a polyol-based or amine-based vulcanizing agent. 8. The fluororubber according to claim 1, wherein the component D is contained in an amount of 0.5 to 5 parts by weight based on 100 parts by weight of the component A. Composition. 9. The fluororubber composition according to claim 1, wherein the component E is an organic quaternary phosphonium salt or an organic quaternary ammonium salt. 10. The fluororubber according to claim 1, wherein the component E is contained in an amount of 0.5 to 5 parts by weight based on 100 parts by weight of the component A. Composition. 11. The fluororubber composition according to claim 1, wherein the component F is an organic solvent capable of dissolving or dispersing the rubber compound comprising the components A to E. 12. A fixing member for fixing a toner transferred onto a recording material, wherein a fixing member is provided on a surface of the fixing member.
A fixing member provided with a coating obtained by applying and drying the fluororubber composition according to any one of claims 1 to 7. 13. The fixing member having a surface roughness Rz of 5 μm.
13. The fixing member according to claim 12, wherein: 14. The fixing member having a surface energy of 15
14. The fixing member according to claim 12, wherein dyn / cm is 20 dyn / cm. 15. A fixing method for fixing a toner transferred onto a recording material using a fixing member, wherein the fluororubber composition according to claim 1 is applied to the surface of the fixing member. A fixing method comprising fixing using a fixing member provided with a coated and dried film. 16. A fixing device provided with a fixing member for fixing toner transferred onto a recording material, wherein the fixing member is the fixing member according to any one of claims 12 to 14. Characteristic fixing device.