JP2005314463A - Heat insulation resin material, fixing member using the same, fixing apparatus and image forming device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat insulation resin material whose heat insulation characteristics and hardness can arbitrarily be regulated, a fixing member using it, a fixing apparatus, and an image forming device. <P>SOLUTION: A solid material having heat insulation property as a heat insulation material and optionally a closed cell are fixed with a silicone resin to obtain the heat insulation resin material. If a high hardness is needed, it is possible to raise hardness by increasing the solid heat insulation material, and by incorporating the solid material into the silicone resin in a volume ratio of 30-66%, it is possible to realize a hardness of 50-95 in terms of Asker C hardness which is higher than that of the silicone resin. There are provided a fixing member, such as a pressing roller and a heat insulation roller, using it and a fixing apparatus and an image forming device by electrophotography equipped with the fixing member. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a heat insulating resin material which has excellent characteristics regarding heat insulating performance in a resin material which requires heat resistance, and whose resin hardness is adjusted to a higher one than a lower one compared to the original hardness of a silicone resin. In particular, a fixing member such as a pressure roller or a heat insulating roller for fixing the toner transferred on the recording material by heating and pressing, a fixing device including the fixing member, and an electrophotographic image The present invention relates to a forming apparatus.

  Conventionally, in order to improve heat insulation, the heat-resistant heat-insulating resin material has a structure in which a gas having high heat-insulating performance is included in the resin as bubbles. At this time, the encapsulated gas is an independent bubble or a continuous form, but its shape changes due to heating, pressurization, etc., and not only the volume as a heat insulating material changes temporarily but also permanent. In order to prevent permanent deformation due to distortion or to prevent a change in roller shape, one having a multi-layer structure is used (for example, see Patent Document 1).

  In addition, independent bubbles and continuous voids contained in the resin are greatly deformed when compressed compared to the resin constituting the layer, and the hardness of the resin layer is reduced compared to the case of the resin alone. If necessary, a method of reducing the number of contained independent bubbles or continuous voids or reducing the thickness of the layer, or forming a plurality of layers having a high hardness layer in a multilayer configuration is used. .

  On the other hand, as a means for increasing the hardness of the resin layer, a method in which the resin contains a resin or a solid filler having a higher hardness than the resin as a base material has been used. There was a limit to the amount added to increase the hardness because of its high conductivity.

  Further, in an image forming apparatus such as an electrophotographic laser printer or a copying machine, a printing material such as toner can be transferred and adhered to a recording medium using a photoconductor or the like, and this can be fixed by heating and pressing. Generally done.

  The fixing device used in this image forming apparatus uses a heat generated by induction heat generation by radiating a high frequency electromagnetic wave generated by an IH coil as a heat generation source, and uses heat generated by the generated eddy current. The IH coil and the heating element are placed outside the heating roller near the portion where the printing material is transferred and adhered, and the heating roller is heated. The heated heating roller is recorded on the recording medium with the pressure roller. A printing material such as toner on the medium is heated and pressurized.

As another example of the fixing device, there is a fixing device using a heat generating roller provided with a halogen heater inside as a heat source. At this time, the heat generated by the heat generation roller is used not only to increase the temperature of the printing material such as toner and the paper to be transferred, but also to increase the temperature of the pressure roller in contact therewith.
JP-A-6-27850

However, the heat-resistant heat-insulating resin material has a structure in which a gas having high heat-insulating performance is included in the resin in independent bubbles or in a continuous form in order to improve heat insulation, but the shape thereof is increased by heating or pressurization. There is a problem that not only the volume as a heat insulating material changes temporarily but also permanent deformation due to permanent distortion occurs. In addition, since a multi-layer structure is used in order to prevent changes in the roller shape, there is a problem that not only joining at the interface between the constituent materials is required, but also causing peeling.

  In addition, independent bubbles and continuous voids contained in the resin have a problem that deformation during compression is larger than that of the resin constituting the layer, and the hardness is lower than that of the resin alone. If the resin layer needs to be hard, reduce the number of contained internal bubbles or continuous voids, or reduce the thickness of the layer, or configure multiple layers with a high hardness layer. There was also an issue that we had to do.

  On the other hand, as a means for increasing the hardness of the resin layer, a method in which the resin contains a resin having a hardness higher than that of the resin serving as a base material or a solid filler has been used. There is also a problem that there is a limit to the amount to be added in order to increase the hardness with high conductivity, and it is difficult to adjust to the desired hardness.

  Also, in an image forming apparatus such as an electrophotographic laser printer or a copying machine, a printing material such as toner is transferred and adhered to a recording medium using a photoconductor or the like, and the toner transferred onto the recording material is heated. In the image forming apparatus for fixing by applying pressure, the heat generated by the heat generating device in the fixing unit is diffused through the pressure roller that comes into contact with the image forming apparatus. There is also a problem that extra heating is required to replenish the lost heat amount, resulting in an increase in power consumption as a device. For this reason, there also existed a subject that excessive preheating was needed in order to shorten rise time.

  Accordingly, an object of the present invention is to provide a heat insulating resin material capable of arbitrarily adjusting the heat insulating characteristics and hardness, a fixing member using the same, a fixing device, and an image forming apparatus.

  In order to solve the above-mentioned problems, the present invention is a heat insulating resin material in which a solid material having heat insulating performance and a closed cell as necessary are fixed with a silicone resin as a heat insulating material. A fixing member such as a pressure roller and a heat insulating roller, a fixing device including the fixing member, and an electrophotographic image forming apparatus are provided.

  According to the present invention, not only high heat insulation performance can be obtained, but when high hardness is required, the hardness can be increased by increasing the amount of solid heat insulating material, and the volume ratio of the silicone resin is 30 to 66%. By making it contain, it becomes possible to implement | achieve 50-95 of higher hardness than a silicone resin by Asker C hardness. Further, when the volume ratio of the solid heat insulating material to the silicone resin is set to 66% or more, gas is contained in the heat insulating material and the silicone resin, and the heat insulating characteristics can be improved. At this time, if the volume ratio greatly exceeds 70%, the properties of silicone rubber as a rubber are remarkably deteriorated, but the heat insulation properties are greatly improved. Moreover, it becomes possible to make it a low-hardness material by containing a solid heat insulating material and a closed-cell body in silicone rubber in arbitrary ratios. By using the heat insulating material having the above characteristics, the degree of freedom in designing the fixing member and the fixing device used in the image forming apparatus can be remarkably improved.

  Further, by using the heat insulating resin material for the fixing member and the fixing device used in the image forming apparatus, it is possible to reduce the heat applied for fixing by the pressure roller and the heat insulating roller which are the fixing members. It is possible to reduce the running energy consumption of the fixing device, and to significantly shorten the time required to reach a predetermined fixing temperature at the start-up.

  The solid material having the heat insulation performance of the present invention and the heat insulation resin material characterized by fixing the closed cells with a silicone resin as necessary can provide not only high heat insulation performance but also high hardness. The hardness can be increased by increasing the amount of solid heat insulating material. In addition, since the fixing member using the heat insulating resin material has high heat insulating performance or hardness, the pressure contact force can be easily adjusted without taking away heat applied for fixing. In addition, it is possible to significantly reduce the time required to reach a predetermined fixing temperature when the fixing device starts up. For this reason, it becomes possible not to preheat. In addition, the image forming apparatus can reduce the consumption of running energy and realize significant energy saving.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments and examples described below are merely examples of the present invention and do not limit the present invention.

  FIG. 1 is a schematic configuration diagram of a heat insulating resin material in which a solid material having heat insulating performance in an embodiment of the present invention is fixed with a silicone resin.

  First, a heat insulating material in which a solid material having heat insulating performance is contained or fixed in a silicone resin and heat insulating properties and hardness are arbitrarily adjusted will be described with reference to FIG. In FIG. 1, 1 is a silicone resin, 2 is a solid material, and 100 is a heat insulating resin material.

  As shown in FIG. 1, the volume per unit volume of the silicone resin 1 can be reduced by containing or fixing the solid material 2 having a high heat insulation property and a low heat capacity in the silicone resin 1.

  At this time, the solid material 2 includes a heat insulating material having lower heat transfer characteristics than the silicone resin 1 and having heat resistance. For example, the carbon material or the like may be a carbon resin, carbon graphite, a porous carbon material, or a plant material. Cork and wood chips, etc., carbonized treatment of the above materials, and glass such as soda lime silicic acid and silicic acid silicone glass or lead glass, and phosphate glass, or hollow bodies and foams of metals and ceramics, Furthermore, a fluororesin, a low molecular silicone resin, an epoxy resin, a phenol resin, or the like, or a foam or hollow body of the resin material may be used as the heat resistant resin material. Among these, silicate glass is desirable as the solid material 2 because of its high hardness and particle size uniformity.

More specifically, hollow silicon beads are preferable as the solid material 2, and the hollow silicon beads having a particle size of 10 to 150 μm and a bulk density of 0.07 to 0.8 g / cm ³ are used. However, from the viewpoints of pressure strength and hollowness, those having a particle size of 30 to 70 μm and a bulk density of 0.1 to 0.6 g / cm ³ are desirable.

  Moreover, since the volume of the silicone resin 1 is reduced by containing or fixing these solid and high thermal insulation materials (solid material 2), the amount of elastic deformation of the silicone resin 1 is regulated, and the solid material The elastic deformation rate of 2 can be adjusted, for example, to increase the hardness, depending on the purpose from a small object to a large object.

  In particular, when high hardness is required, it can be arbitrarily adjusted by reducing the volume ratio of the silicone resin 1 and selecting a material having a small elastic deformation rate.

Further, at this time, a method of containing the solid material 2 using a kneader such as a kneader or a roller type with respect to the normal silicone resin 1 or an organic solvent capable of dissolving and swelling the solid material 2 and the silicone resin 1, By using a petroleum-based solvent such as toluene, THF, octane, or isooctane and performing a surface treatment in advance, the volume ratio with the silicone resin 1 can be arbitrarily realized at 30 to 70%.

  Further, when the solid particle size is almost uniform, even if the solid material 2 is closely packed, if the volume ratio exceeds 66%, it is theoretically impossible to fill the surplus volume part with the silicone resin 1 and the gas phase Exists. Although the mechanical strength as the heat insulating resin material is deteriorated by the inclusion of the gas phase, the heat insulating properties can be improved. Therefore, a volume ratio of 70% or less of the solid material 2 and the silicone resin 1 is desirable as the heat insulating resin material 100 having elasticity.

  Here, FIG. 2 is a schematic configuration diagram of a heat insulating resin material in which a solid material having heat insulating performance and a closed cell body are fixed with a silicone resin in the embodiment of the present invention.

  Next, a heat insulating material in which a solid material having heat insulating performance and closed cells are contained or fixed in a silicone resin and heat insulating properties and hardness are arbitrarily adjusted will be described with reference to FIG. In FIG. 2, 3 is a closed cell.

  As shown in FIG. 2, by containing or fixing a solid material 2 having a high heat insulation property and a low heat capacity and a closed cell body 3 having a high heat insulation property and a low heat capacity in the silicone resin 1, The volume per unit volume can be reduced. Thereby, it becomes possible to remarkably improve the heat insulation characteristics as the heat insulation material and the low heat capacity characteristics.

  At this time, as the solid material 2, as described above, a heat insulating material having low heat transfer characteristics and heat resistance compared to the silicone resin 1 can be cited. As the carbon material, carbon resin, carbon graphite, porous carbon material, Cork and wood chips as plant materials, etc., carbonized materials of the above materials, hollow bodies and foams of glass or metal and ceramics, gas such as air and nitrogen, and vacuum or gas inside A fine capsule, a porous body having heat insulating properties, a fluororesin, a low molecular silicone resin, an epoxy resin, a phenol resin, or the like, or a foam or hollow body of the resin material may be used as the heat resistant resin material.

  In addition, the closed cell body 3 takes the foam body into the resin before heating and curing of the silicone resin 1, or adds a foaming agent that vaporizes and foams during the heating and baking, or in the silicone resin 1. When a mixed resin raw material is heated by adding a solvent having a boiling point not higher than the heating and baking temperature, it is generated as independent bubbles in the process of vaporizing these solvents. It becomes possible to make the closed cell 3 in the silicone resin 1 as shown in FIG.

  Moreover, since the volume of the silicone resin 1 is reduced by containing or fixing these solid and highly heat-insulating materials (solid material 2), the amount of elastic deformation of the silicone resin 1 is regulated and the elastic deformation rate of the material. , And the hardness can be increased. On the other hand, by containing or fixing the closed cell body 3, these are easily elastically deformed, so that the elastic deformation rate as a heat insulating material is increased and the hardness is decreased. be able to.

  Therefore, it is possible to provide a heat insulating resin material whose hardness is freely set according to the purpose from a material having a smaller hardness than that of the silicone resin 1 to a large material by arbitrarily setting the ratio of the solid material 2 and the independent gas material 3. Can do.

At this time, when the solid material 2 is contained in the normal silicone resin 1 using a kneader such as a kneader or a roller type, the content of the normal silicone resin 1 is 30% or more by volume ratio. Although it is difficult, as an organic solvent that can dissolve and swell the solid material 2 and the silicone resin 1, a high volume ratio can be obtained by using a petroleum-based solvent such as toluene, THF, octane, or isooctane and performing surface treatment in advance. Mixing can be realized. By using the above technique, the volume ratio with the silicone resin 1 can be arbitrarily realized at 30 to 70%.

  Further, when the particle size is almost uniform, even if the solid material 2 is closely packed, if the volume ratio exceeds 66%, it is theoretically impossible to fill the surplus volume part with the silicone resin 1 and the gas phase is Exists. This gas phase has a continuous shape, and not only makes it easy to cause permanent deformation due to pressure, but also deteriorates the mechanical strength as a heat-insulating resin material, so that high flexibility is imparted to the silicone resin layer. In addition, the silicone resin 1 can be mixed with a mixture such as silicon monomer or silicone oil to increase flexibility, but it is possible to improve the heat insulation property, and the volume ratio of the solid material 2 and the silicone resin 1 is 70. % Or less is desirable as the heat insulating resin material 100 having elasticity.

  Next, a fixing member, a fixing device, and an image forming apparatus using these heat insulating resin materials will be described.

  First, the fixing member and the fixing device will be described. FIG. 3 is a schematic cross-sectional view showing a fixing device to which a fixing member using a heat insulating resin material in the embodiment of the present invention is applied. In FIG. 3, 4 is an axis, 5 is a heat generating roller, 6 is an IH coil, 7 is an IH magnetic core, 8 is a separation claw, 9 is an axis, 10 is a flexible layer, and 11 is a recording medium 11 is toner. Furthermore, 200 is a fixing member, and 300 is a fixing device.

  As shown in FIG. 3, the fixing device 300 is configured by a heating element that generates high-frequency electromagnetic waves generated by the IH coil 6 as a heat generation source and efficiently controls the magnetic circuit by the IH magnetic core 7 to induce heat generation. The heat generated by the eddy current generated by the heat generating roller 5 is applied to the belt-shaped heat generating roller 5, and the toner 12 as a printing material is transferred onto the recording medium 11 by this heat.

  A roller-shaped fixing member 200 disposed inside the belt-shaped heat generating roller 5 and provided with the heat insulating resin material 100 on the shaft center 4 is opposed to the shaft core 9 via the belt-shaped heat generating roller 5. The pressure roller provided with the flexible layer 10 is used to adhere the toner 12 onto the recording medium 11.

  That is, the IH coil 6 and a belt-like heat generating roller 5 as a heating element are disposed outside the fixing member 200, and the heat generating roller 5 is heated by the IH coil 6, and the fixing member 200 is sandwiched by the heat generating heat roller 5. In addition, the recording medium 11 and the toner 12 on the recording medium 11 are heated and pressurized by a pressure roller facing the same.

  At this time, the fixing member 200 and the pressure roller other than the heat generating roller 5 are integrated by covering the shaft center 4 and the shaft center 9 with the heat insulating resin material 100 and the flexible layer 10.

  These rollers need not only apply heat to the recording medium 11 and the upper toner 12 but also need to apply pressure. Examples of the metal material having mechanical rigidity used for the shaft center 4 and the shaft center 9 include iron, iron alloys, stainless steel, aluminum, and alloy materials. In addition, PEEK materials and phenols are used as high-rigidity resin materials. A resin or a composite material using glass fiber or carbon fiber as a reinforcing material is used. These materials can also take the form of a hollow pipe to reduce the heat capacity.

  Since these high-rigidity shaft center materials have a large heat capacity and easily transmit the generated heat, the heat insulating resin material 100 with the hardness adjusted according to the present invention improves the heat insulating property of the shaft core 4 to significantly reduce the energy loss. Can be improved.

  Here, FIG. 4 is a schematic sectional view showing another example of a fixing device to which a fixing member using a heat insulating resin material in the embodiment of the present invention is applied. In FIG. 4, 13 indicates a release layer, and 14 indicates a halogen heater.

  As shown in FIG. 4, the fixing device 300 uses a halogen heater 14 as a heat source. At this time, similarly to the case of heating by the IH coil 6 shown in FIG. 3, since the toner 12 on the recording medium 11 needs to be heated and pressurized, the flexible layer 10 is provided in the shaft center 9 and the fixing member 200 is provided inside. The heating roller 5 is pressurized by a belt-like pressure roller having The heat generating roller 5 preferably has a small heat capacity in order to shorten the time required to reach the required temperature. On the other hand, in order to heat and press the toner 12 on the recording medium 11 with the pressure roller, it is necessary to form a nip and mechanical rigidity is also required. Although it is necessary to arrange a roller for supporting the heat generating roller 5, it is desirable that the heat capacity is small. Therefore, a roller-shaped fixing member 200 provided with the heat insulating resin material 100 is disposed inside the pressure roller at a position facing the heat generating roller 5. Further, in the combination with the toner 12, from the viewpoint of image quality, the hardness of the roller is required to be high in the case of monochrome, but in the case of color, it is necessary to keep the hardness lower than that of monochrome. Therefore, by using the heat insulating resin material 100 of the present invention, it is possible to arbitrarily set the hardness of the roller and simultaneously realize both high heat insulating properties.

  In addition, since the fixing device 300 having high heat insulation characteristics can be realized, it is possible to start heating simultaneously with the start of printing without remaining heat at the time of printing standby, and control with high maintainability by extending the life of the resin material. It becomes a method.

  In the case of the fixing member 200 shown in FIG. 3, the roller provided with the heat insulating resin material 100 constitutes a so-called fixing roller. In the case of the fixing member 200 shown in FIG. 4, the roller provided with the heat insulating resin material 100 is This constitutes a so-called pressure roller. As described above, the roller provided with the heat insulating resin material 100 of the present invention may be used for either the fixing roller as the fixing member 200 or the pressure roller (or a part of the member having the function), and has a heat insulating performance. It may be used as a heat insulating roller when required.

  Next, the image forming apparatus will be described. FIG. 5 is a schematic cross-sectional view showing an image forming apparatus to which a fixing device including a fixing member using a heat insulating resin material according to an embodiment of the present invention is applied.

  As shown in FIG. 5, the photosensitive drum 41 (electrophotographic photosensitive member) is rotated at a predetermined peripheral speed in the direction indicated by an arrow in the drawing, and the surface thereof is brought to a predetermined negative dark potential by the charger 42. It is charged like this.

  A laser beam scanner 43 outputs a laser beam modulated in accordance with a time-series electric digital pixel signal of image information input from a host device such as an image reading device or a computer (not shown). The uniformly charged surface of the photosensitive drum 41 is scanned and exposed with this laser beam, and the exposed portion has a small absolute potential value to become a bright potential, and an electrostatic latent image is formed on the surface of the photosensitive drum 41.

Next, the electrostatic latent image is reversely developed with a negatively charged powder toner by the developing unit 44 to be visualized. Here, the developing device 44 has a developing roller 44a that is driven to rotate, a thin toner layer having a negative charge is formed on the outer peripheral surface of the developing roller 44a, and faces the surface of the photosensitive drum 41. A developing bias voltage having an absolute value smaller than the dark potential of the photosensitive drum 41 and larger than the light potential is applied to 44a. Therefore, the toner on the developing roller 44a is transferred only to the light potential portion of the photosensitive drum 41, and the latent image is visualized.

  On the other hand, the recording medium 11 is fed sheet by sheet from the sheet feeding section 46 and is sent to a nip portion between the photosensitive drum 41 and the transfer roller 49 in contact with the photosensitive drum 41 through a roller pair composed of rollers 47 and 48. At this time, it is sent at an appropriate timing synchronized with the rotation of the photosensitive drum 41. The toner images on the photosensitive drum 41 are sequentially transferred to the recording medium 11 by the action of the transfer roller 49 to which a transfer bias is applied.

  Next, the recording medium 11 passing through the transfer portion is separated from the photosensitive drum 41 and introduced into the fixing device 300, where the transferred toner image is fixed. The fixing device 300 is as described above.

  Then, the recording medium 11 on which the toner is fixed and the image is fixed by the fixing device 300 is sent to the paper discharge tray 50 and printed out. Note that the surface of the photosensitive drum 41 after separation of the recording medium 11 is cleaned by the cleaning device 45 after removal of the residual surface of the photosensitive drum 41 such as transfer residual toner, and the next image formation is repeated.

  The image forming apparatus 400 according to the present embodiment includes the fixing device 300, so that consumption of running energy can be reduced, significant energy saving can be realized, and the time required to reach a predetermined fixing temperature at the start-up can be greatly increased. It can be shortened.

  As described above, according to the present embodiment, a solid material having heat insulation performance and a heat insulation resin material in which closed cells are fixed with a silicone resin as required can not only obtain high heat insulation performance but also high hardness. However, the hardness can be increased by increasing the amount of solid heat insulating material.

  Specifically, by containing 30 to 66% by volume in the silicone resin, it is possible to achieve 50 to 95, which is higher than the silicone resin in Asker C hardness. This is because the heat insulating material having a hardness higher than that of the silicone resin gives the effect of suppressing the deformation of the silicone resin. Further, when the volume ratio of the solid material to the silicone resin is 66% or more, the solid material In addition, gas is contained in the silicone resin, and it is possible to obtain an improvement in heat insulation characteristics. At this time, if the volume ratio greatly exceeds 70%, the properties of the silicone rubber as rubber are remarkably deteriorated. Therefore, it is preferably 70% or less, but the heat insulation properties are greatly improved by containing a large amount of gas.

  In addition, by including solid heat insulating material and closed cells in any proportion in silicone rubber, the hardness of silicone resin decreased by solid heat insulating material can be increased, and the elasticity of closed cells can provide elasticity. Can be obtained. At this time, the bubble does not necessarily need to be independent, and the open cell is more effective when the hardness is remarkably reduced.

  In addition, a pressure roller or a heat insulating roller as a fixing member using the heat insulating material of the present invention is added for fixing in an image forming apparatus that heats and pressurizes toner transferred onto a recording medium. The heat consumed by these rollers can be reduced, the running energy consumption of the device can be kept low, significant energy savings can be realized, and the time to reach the specified fixing temperature at startup is greatly increased. It can be shortened. Therefore, in the conventional image forming apparatus, it is possible not to perform preheating of the fixing unit, which is necessary for reducing the standby time at the start-up other than during image fixing.

Further, by using the heat insulating resin material of the present invention, the pressure roller and the heat insulating roller can be made to have a desired hardness, so that the toner transferred onto the recording material is fixed by heating and pressing. In this case, it is possible to arbitrarily design the width and pressure of the nip formed by applying pressure and pressing the roller to desired numerical values.

  In addition, the Example described below is an example of this invention, Comprising: This invention is not limited.

First, hollow silicon beads having a particle size of 30 to 60 μm and a bulk density of 0.38 to 0.6 g / cm ³ as a solid material were used.

  Then, 60% of this hollow silicon bead was contained in the silicone resin, and the hollow silicon bead was fixed with the silicone resin to obtain the heat insulating resin material of Example 1.

  Similarly, the hollow silicon beads were contained in a volume ratio of 70% with respect to the silicone resin, and the hollow silicon beads were fixed with the silicone resin to obtain a heat insulating resin material of Example 2.

  And the heat conductivity of these obtained heat insulation resin materials was measured. For comparison, the thermal conductivity of the silicone resin alone was also measured.

  In the case of the silicone resin alone, the thermal conductivity was 0.3 W / m · k. On the other hand, the heat insulating resin material of Example 1 was 0.2 W / m · k, and the heat insulating performance was greatly improved. Furthermore, even with the heat insulating resin material of Example 2, 0.15 W / m · k or less could be achieved.

  The present invention can also be applied to uses of a heat insulating resin material that requires heat insulating performance, a fixing member using the same, a fixing device, and an image forming apparatus.

The schematic block diagram of the heat insulation resin material which fixed the solid material which has heat insulation performance in embodiment of this invention with the silicone resin The schematic block diagram of the heat insulation resin material which fixed the solid material which has heat insulation performance in embodiment of this invention, and the closed cell body with the silicone resin 1 is a schematic cross-sectional view showing a fixing device to which a fixing member using a heat insulating resin material in an embodiment of the present invention is applied. Schematic sectional view showing another example of a fixing device to which a fixing member using a heat insulating resin material in the embodiment of the present invention is applied. 1 is a schematic cross-sectional view showing an image forming apparatus to which a fixing device including a fixing member using a heat insulating resin material in an embodiment of the present invention is applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Silicone resin 2 Solid material 3 Closed-cell body 4 Axial center 5 Heat generating roller 6 IH coil 7 IH magnetic core 8 Separation nail 9 Axial center 10 Flexible layer 11 Recording medium 12 Toner 13 Release layer 14 Halogen heater 100 Insulating resin material 200 Fixing Member 300 Fixing device 400 Image forming apparatus

Claims (16)

A heat insulating resin material characterized in that a solid material having heat insulating performance is contained in a silicone resin. A heat insulating resin material, characterized in that a solid material having heat insulating performance is fixedly molded with a silicone resin. A heat insulating resin material comprising a silicone resin containing a solid material having heat insulating performance and closed cells. A heat insulating resin material characterized in that a solid material having heat insulating performance and a closed cell body are fixedly molded with a silicone resin. The heat insulating resin material according to any one of claims 1 to 4, wherein a hollow body such as glass or metal or ceramic is used as the solid material. The heat insulating resin material according to any one of claims 1 to 5, wherein a foamed material such as glass or metal or ceramic is used as the solid material. The heat insulating resin material according to any one of claims 1 to 6, wherein heat insulating properties and hardness are arbitrarily adjusted according to the content of the solid material. The heat insulating resin material according to any one of claims 1 to 7, wherein the solid material is contained in the silicone resin in a volume ratio of 30 to 70%. A fixing member comprising the heat insulating resin material according to claim 1. A fixing member comprising the heat insulating resin material according to claim 1 at least on the surface of the fixing member and having a roller shape. The fixing member according to claim 10, wherein the hardness of the heat insulating resin material is higher than the hardness of the silicone resin alone. The fixing member according to claim 10, wherein the heat insulating resin material has an Asker C hardness of 50 to 95. A fixing device for fixing toner transferred onto a recording medium, comprising the fixing member according to claim 9. The fixing device according to claim 13, wherein the fixing device is heated by an IH coil. The fixing device according to claim 13, wherein the fixing device is heated by a halogen heater. An image forming apparatus comprising the fixing device according to claim 13.

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