WO2017163689A1 - 発熱定着ベルト、発熱定着ベルトの製造方法、および画像定着装置 - Google Patents
発熱定着ベルト、発熱定着ベルトの製造方法、および画像定着装置 Download PDFInfo
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- WO2017163689A1 WO2017163689A1 PCT/JP2017/005911 JP2017005911W WO2017163689A1 WO 2017163689 A1 WO2017163689 A1 WO 2017163689A1 JP 2017005911 W JP2017005911 W JP 2017005911W WO 2017163689 A1 WO2017163689 A1 WO 2017163689A1
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- elastic
- heat
- layer
- resistance heating
- fixing belt
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
- G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
- G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
- G03G15/2053—Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
- G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
- G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
- G03G15/2064—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat combined with pressure
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
- G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
- G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
- G03G15/2053—Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating
- G03G15/2057—Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating relating to the chemical composition of the heat element and layers thereof
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/20—Details of the fixing device or porcess
- G03G2215/2003—Structural features of the fixing device
- G03G2215/2016—Heating belt
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/20—Details of the fixing device or porcess
- G03G2215/2003—Structural features of the fixing device
- G03G2215/2048—Surface layer material
Definitions
- the present invention relates to a heat generating fixing belt for heat fixing a toner image on an image support in an image forming apparatus such as a copying machine or a printer, a method for manufacturing the heat fixing belt, and an image fixing apparatus.
- Japanese Unexamined Patent Publication No. 2000-058228 discloses a thin film resistance heating element using carbon nanotubes and carbon microcoils as a conductive material, and a toner fixing member for heating using this thin film resistance heating element.
- the thin film resistance heating element formed of carbon nanotubes and carbon microcoils has a reduced mechanical strength of the heating element. For this reason, it is difficult to increase the mixing amount of carbon nanotubes or the like to lower the volume resistance value.
- Japanese Patent Application Laid-Open No. 2013-122531 discloses a method in which metal nanoparticles are supplied to the surface of a resistance heating layer and an electrode is formed by an electroless plating method using this as a catalyst. However, sufficient adhesion is not achieved even by this method.
- An object of the present invention is to provide a heat-generating fixing belt excellent in bending resistance and durability.
- an object of the present invention is to provide a heat-generating fixing belt capable of lowering a volume resistance value by increasing the amount of a conductive material, and even in that case, excellent bending resistance and durability can be obtained. To do.
- An exothermic fixing belt for solving the above-mentioned problems is a tubular belt base formed of an insulating heat-resistant resin, and an elastic resistance formed of an elastic base material containing a conductive material and containing an elastic material.
- a heat generating layer, a release layer, and a pair of electrode layers for supplying power to the elastic resistance heat generating layer are provided.
- the elastic resistance heating layer is provided on the outer peripheral surface of the belt base.
- the release layer is provided as the outermost layer.
- the pair of electrode layers are provided at both end portions of the outer peripheral surface of the elastic resistance heating layer, and have a volume resistance value lower than the volume resistance value of the elastic resistance heating layer.
- an exothermic fixing belt excellent in bending resistance and durability is provided.
- the volume resistance value can be lowered by increasing the amount of the conductive material, and even in that case, excellent bending resistance and durability are achieved.
- FIG. 1 is a partial cross-sectional view of an example of a heat fixing belt according to an embodiment in which a part is cut.
- FIG. 2 is a schematic diagram illustrating an image fixing device using the heat-generating fixing belt according to the embodiment.
- FIG. 3 is a schematic diagram illustrating an image fixing apparatus using the heat-generating fixing belt according to the embodiment.
- FIG. 4 is a diagram showing an outline of a measurement system for the exothermic temperature distribution.
- FIG. 5 is a diagram showing an outline of a bending resistance measurement system.
- Embodiments provide an exothermic fixing belt for thermally fixing a toner image on an image support in an image fixing apparatus used in an image forming apparatus such as a copying machine or a printer.
- an image fixing apparatus used in an image forming apparatus such as a copying machine or a printer.
- FIG. 1 is a view showing an example of a heat fixing belt according to the embodiment.
- (a) is the front surface of the heat-generating fixing belt
- (b) is a cross-sectional view taken along line BB of (a) and enlarged
- (c) is a side surface viewed from side C of (a).
- the heat generating fixing belt 1 includes a tubular belt base 10, an elastic resistance heat generating layer 20 existing on the peripheral surface of the base 10, a release layer 30 existing as an outermost layer on the peripheral surface of the heat generating fixing belt 1, and an elastic resistance.
- a pair of electrode layers 40a and 40b arranged to supply power to the heat generating layer 20 and an elastic layer 50 existing between and in contact with the elastic resistance heat generating layer 20 and the release layer 30 are provided. .
- the belt base 10 is a member that is the basis of the heat-generating fixing belt 1, and each layer is laminated on the peripheral surface.
- the belt base 10 is tubular and will be described in detail later.
- a core material is disposed therein and set in an image fixing device of an image forming apparatus such as a copying machine or a printer.
- the belt base 10 is made of a heat-resistant resin and is preferably insulating.
- the belt substrate 10 may include, for example, polyphenylene sulfide (PPS), polyimide (PI), polyamideimide (PAI), polyetheretherketone (PEEK), etc., alone or any combination thereof as a resin material. Alternatively, it may be a mixture containing a combination of any of these materials, or a heat-resistant resin mainly composed of these resins, but is not limited thereto.
- the preferred heat-resistant resin constituting the belt substrate 10 is mainly a resin selected from the group consisting of polyphenylene sulfide, polyimide, polyamideimide, polyetheretherketone, or a combination thereof. It is characterized by.
- the belt base 10 may be tubular, and the ratio between the inner diameter and the width is not particularly limited, but the ratio between the inner diameter and the width may be, for example, between 1: 1 and 20, For example, it may be 1: 5-10.
- the thickness of the belt base 10 may be, for example, 0.02 mm to 0.2 mm, and may be, for example, 0.05 mm to 0.1 mm, but is not limited thereto.
- a release layer 30 is provided on the outer peripheral layer of the heat-generating fixing belt 1 on the peripheral surface of the belt base 10.
- the release layer 30 is provided as an upper layer of the tubular belt base 10 and the elastic resistance heating layer 20 and as the outermost layer on the peripheral surface of the heat generating fixing belt 1.
- the release layer 30 is in direct contact with the toner and a support on which the toner is placed, for example, paper or sheet. The toner is fixed by contacting with them and applying heat to them to form a toner image.
- the region where the release layer 30 is arranged is arranged seamlessly (that is, arranged in an annular shape) over the entire rotation direction of the peripheral surface of the heat-generating fixing belt 1 and also in the width direction of the heat-generating fixing belt 1, that is, In the axial direction, it may extend to the same range or wider than the area where the support can exist, or to the same area or wider than the area where the toner image to be fixed can exist.
- FIG. 1 shows an example in which the release layer 30 is disposed on the entire circumferential surface excluding the vicinity of both end portions of the belt base 10.
- the release layer 30 can be formed of a material having excellent heat resistance and good release properties with respect to the toner and the support.
- the release layer 30 can be formed from, for example, a fluororesin.
- the fluororesin include polytetrafluoroethylene (PTFE), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), tetrafluoroethylene-hexafluoroethylene copolymer (FEP), and the like. It can be formed from a mixture of materials.
- the thickness of the release layer 30 is preferably 5 to 30 ⁇ m.
- the mold release layer 30 may be formed after applying a primer.
- the primer may be any material known per se.
- the heat-generating fixing belt 1 is characterized in that a release layer is formed of a fluororesin.
- the heat given to the fixing target through the release layer 30 is generated by energizing the elastic resistance heating layer 20 as follows.
- the elastic resistance heating layer 20 is disposed on the outer peripheral surface of the belt base 10.
- the elastic resistance heating layer 20 is formed of an elastic base material including an elastic material, and the elastic base material further includes a conductive material.
- the elastic material is not particularly limited, but an elastic material having heat resistance is preferable from the viewpoint of the fixing temperature of the toner.
- the elastic material include silicone rubber, fluorine rubber, fluorosilicone rubber, hydrogenated nitrile rubber, and the like.
- fluororubber is preferable because of its particularly excellent heat resistance.
- the elastic matrix can include, for example, these elastic materials alone or in combination with other heat resistant materials.
- the material of the elastic base material can be, for example, fluororubber alone or a mixture of an elastic material such as fluororubber and other heat resistant materials.
- fluororubber when used in a mixture with other heat-resistant materials, the total amount of the fluororubber and the other heat-resistant materials is 100% by weight, so that the fluororubber is 80% by weight or more. It is preferable.
- Further examples of heat resistant materials that can be mixed with the elastic material can be, for example, polyphenylene sulfide (PPS), polyimide (PI), polyamideimide (PAI), polyetheretherketone (PEEK) and fluororesin.
- the elastic material may be characterized as fluororubber, silicone rubber, fluorosilicone rubber, hydrogenated nitrile rubber or combinations thereof.
- the conductive material included in the elastic resistance heating layer 20 is not particularly limited.
- carbon-based conductive materials such as carbon black, graphite, carbon nanotubes, and carbon nanofibers, and various metal particles can be used. possible. These conductive materials may be used alone, or a plurality of types of mixtures may be used.
- Ketjen Black Lion Specialty Chemicals Co., Ltd.
- Ketjen Black Lion Specialty Chemicals Co., Ltd.
- the conductive material can be a carbon-based conductive material or a metal.
- the mixed amount of the conductive material when the conductive material is mixed with the elastic material as the elastic base material, the mixed amount of the conductive material may be 10 to 50% by weight with respect to 100% by weight of the elastic material.
- the mixing amount of the conductive material is 10% by weight or less, the uniformity of the volume resistance value cannot be obtained, and when it is 50% by weight or more, the bending resistance of the resistance heating layer is lowered.
- the material of the elastic base material may further contain additives such as a crosslinking agent, a filler, a dispersant, and a combination thereof in a desired amount as appropriate.
- the elastic resistance heating layer 20 can be disposed over the entire outer peripheral surface of the belt base 10 (that is, can be disposed in an annular shape).
- the thickness of the elastic resistance heating layer can be, for example, 20 to 500 ⁇ m. With such a thickness, the intended performance can be obtained. When the thickness is 20 ⁇ m or less, the mechanical strength of the resistance heating layer is insufficient, and when the thickness is 500 ⁇ m or more, the bending resistance of the elastic resistance heating layer is lowered.
- the thickness of the resistance heating layer may be more preferably 50 to 300 ⁇ m.
- the heat-generating fixing belt 1 of the embodiment includes an elastic material in the elastic resistance heat-generating layer.
- a kneading method using an open roll can be used as a method of mixing the conductive material with the elastic material.
- the conductive material may be mixed in a larger amount than usual with respect to the elastic resistance heating layer 20, thereby reducing the volume resistance value of the elastic resistance heating layer 20.
- the kneading operation may become difficult because the hardness of the compound increases.
- a dispersion in which a conductive material is uniformly dispersed in a solvent can be used.
- such a dispersion may use a liquid elastic matrix material.
- the liquid elastic base material is, for example, a liquid material in which an elastic material or the like is dissolved or dispersed in a desired solvent. By using such a liquid material, it is possible to include a larger amount of conductive material in the elastic base material than usual. As described above, the elastic base material obtained by using the liquid material has excellent dispersion of the conductive material, and uniform conductivity in the elastic resistance heating layer 20 is achieved.
- the solvent that can be used for the liquid material can be, for example, an organic solvent such as MEK or MIBK, or water.
- the elastic resistance heating layer 20 is formed on the outer peripheral surface of the tubular belt substrate 10 by curing the solid material after the solid material is wound on the outer peripheral surface of the tubular belt substrate 10. Can be done by polishing the surface.
- the liquid material may be cured after being applied on the outer peripheral surface of the tubular belt substrate 10 using a method known per se such as spray coating or dipping.
- the molding method of the elastic resistance heating layer 20 is not limited to these.
- the elastic resistance heating layer 20 containing a conductive material and formed of an elastic base material including an elastic material is molded using a liquid material dissolved or dispersed in a solvent. Can be characterized.
- the elastic resistance heating layer 20 exhibits bending resistance that does not cause cracking and peeling when bent using a cylindrical mandrel having a diameter of 5 mm in accordance with JIS K 5600-5-1: 1999. It is characterized by.
- the region where the elastic resistance heat generating layer 20 is disposed may be disposed over the entire circumferential surface of the belt substrate 10 or on the circumferential surface of the belt substrate 10 and in the entire rotational direction of the circumferential surface of the heat generating fixing belt 1.
- the toner images that are arranged seamlessly and in the same range as the region where the support of the belt substrate 10 can exist or a wider range, or the toner image to be fixed May be arranged in the same range as the region where the release layer 30 can exist or wider than that, that is, in a range corresponding to the region where the release layer 30 exists, or wider than the region where the release layer 30 exists It is preferable to arrange in the range, and it is more preferable to arrange over the entire peripheral surface of the belt base 10.
- the elastic resistance heating layer 20 is disposed over the entire peripheral surface of the belt base 10.
- the energization of the elastic resistance heating layer 20 can be performed through the energization of the electrode layer 40 (40a, 40b) as described below.
- the electrode layer 40 is disposed on the belt base 10 so that power can be supplied to the elastic resistance heating layer 20, and at least a part of the electrode layer 40 can be in contact with a power supply unit for transmitting electricity sent from the power source to the electrode layer 40. Is exposed on the heat-generating fixing belt 1.
- the electrode layer 40 is the upper surface of the elastic resistance heating layer 20 disposed on the entire circumferential surface of the belt substrate 10 and is in a region where the release layer 30 does not exist, that is, both ends of the belt substrate 10.
- the heat-generating fixing belt 1 is arranged seamlessly over the entire rotational direction of the heat-fixing belt 1.
- the electrode layer 40a is disposed on the upper surface of the elastic resistance heating layer 20 in the vicinity of one end portion without overlapping the release layer 30, and the electrode layer 40b is in the vicinity of the other end portion.
- the release layer 30 is disposed on the upper surface of the elastic resistance heating layer 20 without overlapping.
- the electrode layer 40 is made of a material lower than the volume resistance value of the elastic resistance heating layer 20.
- the electrode layer 40 is formed of an electrode layer material such as a conductive paste or conductive ink in which metal particles such as Cu, Ni, Ag, Al, Au, Mg, and mixtures thereof are dispersed in a binder. obtain.
- the electrode layer 40 when the electrode layer 40 is formed only by a general conductive paste or conductive ink, the electrode layer 40 can be a very hard film. In that case, problems such as the occurrence of cracks due to failure to follow the deformation during use may occur.
- the electrode layer material may further include an elastic material in the binder component.
- the electrode layer 40 By forming the electrode layer 40 by including an elastic material in the electrode layer material, an electrode layer having excellent bending resistance can be obtained. Furthermore, the electrode layer material may further contain an appropriate amount of additives such as a crosslinking agent, a filler, a dispersant, and a combination thereof.
- additives such as a crosslinking agent, a filler, a dispersant, and a combination thereof.
- the binder contained in the electrode layer material can be any binder that can be used for electrode layer materials such as general conductive paste and conductive ink, or a combination thereof.
- an elastic material that can be included in the elastic resistance heating layer 20 described above can be used.
- the elastic material for the elastic resistance heating layer 20 and the electrode layer material are co-vulcanized, and it becomes possible to obtain strong adhesion. Further, such a configuration eliminates the need to interpose an adhesive between the elastic resistance heating layer 20 and the electrode layer 40.
- the elastic material of the elastic resistance heat-generating layer 20 is fluoro rubber and the electrode layer material includes the same type of fluoro rubber. Thereby, it becomes possible to obtain the electrode layer 40 which is excellent in bending resistance and excellent in adhesion.
- the binder included in the electrode layer material includes the same type of elastic material as the elastic material included in the elastic resistance heating layer 20, and the mixing ratio of the elastic material is 10% of 100% by weight of the binder component. % Or more is preferably an elastic material. When the elastic material contained in the binder component is 10% or less, sufficient adhesion to the elastic resistance heating layer 20 may not be obtained.
- the electrode layer material is formed of a material in which metal particles are mixed with a binder component containing at least the same type of elastic material as the elastic resistance heating layer 20, and the electrode layer 40 and the elastic resistance heating layer 20 are formed.
- the heat generating fixing belt 1 may be laminated without using an adhesive. Such a heat-generating fixing belt 1 can be formed, for example, by simultaneously heat-curing the elastic resistance heat-generating layer 20 and the electrode layer 40.
- the formation of the electrode layer 40 is not particularly limited, and any known coating method such as spray coating or bar coater may be used.
- the thickness of the electrode layer 40 may be 1 ⁇ m or more and 50 ⁇ m or less. Although depending on the volume resistance value of the electrode layer 40, for example, when the thickness is 1 ⁇ m or less, it may be difficult to instantaneously supply current over the entire circumference of the elastic resistance heating layer 20. For example, when the thickness is 50 ⁇ m or more, the hardness of the electrode layer 40 may become very hard, and may not follow the deformation during use, and may cause cracks and peeling.
- the width of the electrode layer 40 is not particularly limited as long as it can be fed from there.
- the thickness of the electrode layer 40 is 1 ⁇ m or more and 50 ⁇ m or less.
- the heat-generating fixing belt 1 has the following characteristics.
- the pair of electrode layers 40a and 40b are formed of metal particles that are contained in a binder.
- the binder component may be the same type of elastic base material as the elastic base material of the elastic resistance heating layer 20.
- the pair of electrode layers 40a and 40b and the elastic resistance heating layer 20 are directly coupled without using an adhesive.
- the elastic material of the elastic resistance heat generating layer 20 may include fluorine rubber, and the electrode layer material of the electrode layer 40 may include the same type of fluorine rubber.
- the volume resistance value of the elastic resistance heating layer 20 may be 1.0 ⁇ 10 ⁇ 3 ⁇ ⁇ cm or more and 1.0 ⁇ 10 3 ⁇ ⁇ cm or less.
- the volume resistance value of the elastic resistance heating layer 20 may be 1.0 ⁇ 10 ⁇ 3 ⁇ ⁇ cm or more and 1.0 ⁇ 10 3 ⁇ ⁇ cm or less.
- the variation in volume resistance value tends to be large, and when this variation becomes very large, it is difficult to obtain a uniform heat generation temperature.
- 1.0 ⁇ 10 ⁇ 3 ⁇ ⁇ cm or less there is a tendency that a large amount of conductive material is required, and as the thickness of the elastic resistance heating layer 20 increases, the bending resistance gradually increases. Can be reduced.
- each of the pair of electrode layers 40a and 40b preferably has a volume resistance value of 1.0 ⁇ 10 ⁇ 3 ⁇ ⁇ cm or less.
- the volume resistance value of the electrode layer 40 may be lower than the volume resistance value of the elastic resistance heating layer 20 and 1.0 ⁇ 10 ⁇ 3 ⁇ ⁇ cm or less. For example, as the volume resistance value of the electrode layer 40 becomes higher than the volume resistance value of the elastic resistance heating layer 20, the volume resistance value of the electrode layer 40 becomes higher than 1.0 ⁇ 10 ⁇ 3 ⁇ ⁇ cm. The more current it becomes, the more difficult it is to supply a sufficient current from the electrode layer 40 to the elastic resistance heating layer 20.
- the elastic layer 50 may exist between the elastic resistance heating layer 20 and the release layer 30 in contact with these layers. Even if the elastic layer 50 is a support having an uneven surface, the elastic layer 50 can be disposed to satisfactorily fix the toner. Therefore, the elastic layer can be disposed in the same range as the release layer 30.
- the elastic layer 50 is disposed on the elastic resistance heat-generating layer 20, and the release layer 30 is further disposed on the elastic layer 50.
- the elastic layer 50 is arranged in a range on the elastic resistance heating layer 20 corresponding to the release layer 30 (that is, arranged in the same range as the release layer 30).
- an elastic layer material having heat resistance and low rubber hardness can be used.
- elastic layer materials include fluorine rubber, silicone rubber, and combinations thereof.
- silicone rubber having a hardness of 10 to 40 degrees according to JIS A can be preferably used.
- the thickness of the elastic layer 50 can be, for example, 100 to 300 ⁇ m.
- any primer known per se may be disposed between them by, for example, coating.
- the elastic layer 50 is made of fluoro rubber or silicone rubber. According to a further preferred embodiment, the elastic layer 50 may have a thickness of not less than 100 ⁇ m and not more than 300 ⁇ m.
- a heat-generating fixing belt having excellent bending resistance and excellent durability during use is provided.
- Such a heat-generating fixing belt has excellent bending resistance and excellent durability during use even if the amount of the conductive material is increased in order to reduce the volume resistance value.
- the heat-generating fixing belt is manufactured by the following manufacturing method. First, an elastic base material paint containing a heat-resistant elastic material and a curing agent is prepared. Next, a dispersion of the conductive material is prepared. Next, the paint and the dispersion are mixed to obtain an elastic resistance heating layer material. Next, an elastic resistance heating layer material is applied to the outer peripheral surface of a tubular belt base made of an insulating heat resistant resin, and dried to form an elastic resistance heating layer before curing. Next, an electrode material is applied to both end portions of the outer peripheral surface of the elastic resistance heating layer before curing, dried, and further heat-cured, whereby an elastic resistance containing a conductive material and an elastic material on the belt substrate.
- a heat generating layer and a pair of electrode layers are formed.
- the pair of electrodes has a volume resistance value lower than the volume resistance value of the elastic resistance heating layer, and is for supplying power to the elastic resistance heating layer.
- a release layer is formed as the outermost layer.
- FIG. 2 (a) and 2 (b) are views showing a state in which the heat-generating fixing belt 1 is set in an example of an image fixing apparatus of an image forming apparatus such as a copying machine or a printer.
- FIG. 2A is a front view of an example of the image fixing device
- FIG. 2B is a side view of the image fixing device of FIG.
- the heat fixing belt 1 is set on two core members 110 a and 110 b so as to be in contact with the inner surface 2 of the heat fixing belt 1.
- the two core members 110a and 110b are disposed at such a distance that the heat-generating fixing belt 1 is disposed without slack.
- the image fixing device 101 includes a pressure roll 210 disposed between the core members 110a and 110b so as to be in contact with a part of the outer peripheral surface of the heat generating fixing belt 1.
- Part of the peripheral surface of the power supply roll 510a is in contact with part of the peripheral surface of the electrode layers 40a and 40b, and current is supplied to the electrode layers 40a and 40b.
- the pressure roll 210 is fixed so that its axis is parallel to the axes of the heat fixing belt 1 and the cores 110a and 110b.
- An object on which an image is to be formed is sent between the heat generating fixing belt 1 and the pressure roll 210.
- the object to be imaged can be a support 410 on which the toner 310 is placed.
- FIG. 2A shows an example in which the target feed is sent from the right side to the left side. This feed is caused by the clockwise rotation of the heat generating fixing belt 1 and the pressure roll 210 by the heat generating fixing belt 1. This can be done by rotating counterclockwise while applying pressure to the side.
- the toner 310 placed on the support 410 is fixed by being heated while it exists between the heat-generating fixing belt 1 and the pressure roll 210, and a toner image 312 is formed.
- FIG. 2 (a) shows an example of a state in which the core is set in an image fixing apparatus using two core materials, but one core material may be used.
- An example is shown in FIG. 3A is a front view showing an example of the image fixing device, and FIG. 3B is a side view of the image fixing device of FIG.
- the heat fixing belt 1 is set on a core member 120 having an outer diameter inscribed in the inner surface 2 of the heat fixing belt 1.
- the image fixing device 102 includes a pressure roll 220 disposed to face the heat generating fixing belt 1. Part of the peripheral surfaces of the power feeding portions 510a and 510b are in contact with part of the peripheral surfaces of the electrode layers 40a and 40b, and current is supplied to the electrode layers 40a and 40b.
- the pressure roll 220 is fixed so that its axis is parallel to the axis of the heat fixing belt 1.
- An object 420 on which the toner 320 is placed is sent between the heat fixing belt 1 and the pressure roll 220. 2A and 2B, the feed is from the right side to the left side, and the pressure roll 220 rotates while being pressed against the heat-generating fixing belt 1.
- the toner 320 becomes a toner image 322 fixed by being heated between the heat-generating fixing belt 1 and the pressure roll 220.
- the heat fixing belt 1 can be connected to a drive motor through the journals fixed to the core members 110a, 110b and 120 in which the heat fixing belt 1 is set (not shown).
- the pressure rolls 210a, 210b, 220 can be similarly connected to a drive motor via a journal (not shown).
- the journal may be any shaft that extends from each roll in the direction of its central axis. The roll can be rotated by rotating this shaft.
- the power supply unit can be, for example, a power supply roll or a power supply bearing. This is arranged so that its central axis is parallel to the central axis of the electrode layer, and a power supply roll having a contact width corresponding to the contact width of the electrode layer is placed in contact with the electrode layer surface.
- the heat-generating fixing belt 1 and the power supply roll maintain contact with each other while rotating in opposite directions in synchronization with each other. By this contact, power is supplied from the power supply roll side to the electrode layer.
- the contact width of the power supply roll may be equal to the contact width of the electrode layer, or may be small or large.
- an image fixing device for heating unfixed toner on a support to form the toner image.
- the image fixing device and the heat fixing belt according to the above-described embodiment are parallel to the heat generating fixing belt, and the pressure is arranged to face the heat generating fixing belt so as to sandwich the support between the peripheral surfaces.
- a roll, and a pair of power supply units configured to supply power to the pair of electrode layers of the heat fixing belt.
- Such an image fixing device can be used in an image forming apparatus such as a copying machine or a printer.
- the image fixing apparatus can be incorporated into the image forming apparatus by any method known per se.
- the heat-generating fixing belt according to the embodiment can reduce the volume resistance value by increasing the amount of the conductive material, and even in that case, excellent bending resistance and durability can be obtained.
- a heat-generating fixing belt was produced and evaluated as follows.
- Measurement method (1) Measurement of volume resistance value The elastic resistance heating layer and the electrode layer molded as described above by using a Loresta GP MCP-T610 (manufactured by Mitsubishi Chemical Analytech) in accordance with JIS K-7194. The volume resistance value was measured. The measurement was performed by leaving the measurement sample for 24 hours or more in an environment of 22 ⁇ 3 ° C. and 55 ⁇ 5% RH.
- a total of 40 locations that is, 5 locations in the belt width direction and 8 locations in the belt circumferential direction, are measured. evaluated.
- FIG. 1 A schematic diagram of the measurement system is shown in FIG.
- a silicone sponge roll 530 having an outer diameter of 25 mm was inserted into each heat-generating fixing belt obtained as described later.
- the electrode layers 40a and 40b located at both ends of the heat-generating fixing belt 1 are brought into contact with power supply portions 510a and 510b using metal bearings. Thereafter, a voltage was applied between the electrode layers through the power feeding units 510a and 510b.
- the silicone sponge roll 530 is connected to a drive motor via journals 540a and 540b, and can rotate the heat generating fixing belt.
- the maximum value of the belt surface temperature is 190 ° C. while checking the temperature of the surface of the heat-generating fixing belt 1 using a thermograph 520 (Mobir M4, manufactured by IR System). The applied voltage was adjusted until the value reached, and the applied voltage at that time was set as the set voltage. Thereafter, power supply was stopped once, and the heat generating fixing belt was cooled to room temperature. After cooling, a set voltage was applied while rotating the silicone sponge roll at 10 rpm, and power was supplied to the heat-generating fixing belt. Measurement of the surface temperature of the belt was started with a thermograph 10 seconds after the application.
- the surface temperature was measured at eight locations in the belt circumferential direction, and the difference between the maximum value and the minimum value of the surface temperature was calculated to obtain a temperature distribution. However, the electrode portions 10 mm located at both ends of the belt were excluded from the calculation of the temperature distribution.
- Adhesion measurement This is a method for evaluating the adhesion of a coating film according to JIS K-5600-5-6 (cross-cut method), and between the elastic resistance heating layer and the electrode layer molded by the above method. The adhesion of was measured. The test results were evaluated in six grades, classification 0 to classification 5, depending on the degree of peeling.
- a stainless steel tube having an outer diameter of 30 mm and a length of 240 mm was inserted into the polyimide resin tubular body obtained above.
- a fluororubber paint used as an elastic resistance heating layer material was prepared by the following method. With an open roll, fluorocarbon rubber (G-501NK, manufactured by Daikin Industries, Ltd.) 100% by weight, MT carbon black (Thermax (Cancarb Ltd. US trademark registered) N990, manufactured by Cancarb Ltd.) 20% by weight, magnesium oxide ( Kyowa Mag (Kyowa Chemical Industry Co., Ltd. registered trademark 30), Kyowa Chemical Industry Co., Ltd. 15% by weight, amine-based curing agent (V-3, Daikin Industries Co., Ltd.) 3% by weight. .
- ketjen black MHI black series, manufactured by Mikuni Dye Co., Ltd.
- the mixing amount was adjusted to 20% by weight of ketjen black with respect to 100% by weight of fluororubber in the solid content.
- the elastic resistance heating layer material was applied to the outer periphery of the polyimide resin base material into which the stainless steel tube was inserted to a desired thickness by spray coating. While rotating, it was dried at 40 ° C. for 10 minutes to obtain a laminate A in which an elastic resistance heating layer before curing was laminated.
- electrode layer material As the electrode layer material, the above-mentioned fluororubber paint and a polyimide solution dissolved in NMP (Rika Coat (registered trademark of Nippon Nippon Chemical Co., Ltd.) SN-20, manufactured by Nippon Nippon Chemical Co., Ltd.) And silver particles were added thereto.
- the mixing amount was adjusted such that the total amount of fluororubber and polyimide resin in the solid content was 100% by weight, and the silver particles were 150% by weight.
- Electrode layer material was applied to a desired thickness by blade coating at 10 mm positions on both ends of the laminate A. While rotating, it was dried at 40 ° C. for 10 minutes to obtain a laminate B in which electrode layers before curing were formed on both ends of the resistance heating layer before curing.
- This laminate B was cured by heating at 150 ° C. for 1 hour, 180 ° C. for 1 hour, and 200 ° C. for 24 hours in a thermostatic bath to obtain a laminate C in which an elastic resistance heating layer and an electrode layer were formed on a substrate.
- the elastic resistance heating layer was 150 ⁇ m and the electrode layer was 10 ⁇ m.
- the volume resistance value of the elastic resistance heating layer was 2.56 ⁇ 10 1 ⁇ ⁇ cm, and the measured maximum / minimum value of 40 locations was 1.12 times.
- the volume resistance value of the electrode layer was 8.12 ⁇ 10 ⁇ 4 ⁇ ⁇ cm.
- the silicone rubber was vulcanized by heating at 140 ° C. for 20 minutes and at 200 ° C. for 4 hours.
- the thickness of the vulcanized silicone rubber was measured to be 200 ⁇ m.
- a laminate D in which silicone rubber having a thickness of 200 ⁇ m was laminated on the laminate C was obtained.
- release layer A fluororesin dispersion (855-510, Mitsui Dupont Fluoro Chemical Co., Ltd.) is passed through a primer (PJ-CL990, manufactured by Mitsui DuPont Fluoro Chemical Co., Ltd.) on the surface of the silicone rubber layer of the laminate D. Manufactured by spray coating. After coating, the film was dried at room temperature for 30 minutes and then placed in an oven at 340 ° C. and baked for 15 minutes. The thickness of the release layer after firing was measured to be 15 ⁇ m.
- Example 1 the heat fixing belt according to the embodiment was obtained. This was designated Example 1.
- Example 2 In the elastic resistance heating layer material, the same procedure as in Example 1 was conducted, except that the mixing amount of the ketjen black dispersion was adjusted so that the volume resistance value of the elastic resistance heating layer was 1 ⁇ 10 3 ⁇ ⁇ cm. An exothermic fixing belt was produced. At that time, the amount of ketjen black mixed with 100% by weight of fluororubber in the solid content was 10% by weight, and the thickness of the elastic resistance heating layer was 220 ⁇ m.
- Example 3 In the elastic resistance heating layer material, the amount of carbon nanotube dispersion (CNTD series, developed product; manufactured by Mikuni Dye Co., Ltd.) so that the volume resistance value of the elastic resistance heating layer is 1 ⁇ 10 ⁇ 3 ⁇ ⁇ cm A heat-generating fixing belt was produced in the same manner as in Example 1 except that was adjusted. The amount of carbon nanotubes mixed with 100% by weight of the fluororubber in the solid content at that time was 50% by weight, and the thickness of the resistance heating layer was 38 ⁇ m.
- CNTD series developed product
- Example 4 Example 1 except that the binder component of the electrode layer material was adjusted so that 10% by weight of the total of 100% by weight of fluororubber and polyimide resin was fluororubber and 90% by weight was polyimide resin. An exothermic fixing belt was produced in the same manner.
- Example 5 A heat-generating fixing belt was produced in the same manner as in Example 1 except that the binder component in the electrode layer material was only fluororubber.
- the Ketjen Black dispersion (MHI Black series, manufactured by Mikuni Dye Co., Ltd.) is added to the polyimide solution (Rikacoat SN-20, manufactured by Shin Nippon Rika Co., Ltd.).
- a conductive polyimide solution whose mixing amount was adjusted so that the value was 2.5 ⁇ 10 1 ⁇ ⁇ cm was used.
- the mixing amount of ketjen black in the solid content at that time was 22% by weight with respect to 100% by weight of the polyimide resin.
- a heat-generating fixing belt was produced in the same manner as in Example 1 except that these elastic resistance heat-generating layer material and electrode layer material were used.
- the thickness of the resistance heating layer at this time was 15 ⁇ m.
- the volume resistance values were all included in the range of 1.00 ⁇ 10 ⁇ 3 to 1.00 ⁇ 10 3 .
- the variation in the volume resistance value is shown as a multiple obtained by dividing the maximum value of the volume resistance value by the minimum value. All of these were included in the range of 1.10 times to 1.3 times.
- Example 1, Example 2 and Example 3 were all good.
- the comparative example was inferior in bending resistance.
- the temperature distribution is indicated by a value ⁇ obtained by subtracting the minimum value from the maximum value. These were all contained between 8.5 ° C and 13 ° C.
- Example 2 Evaluation of electrode layer For Example 1, Example 4 and Example 5, the volume resistance value of the electrode layer, the bending resistance of the electrode layer, the adhesion between the elastic resistance heating layer and the electrode layer, and the heating temperature distribution evaluated. The results are shown in Table 2.
- the ratio of the fluororubber in the binder of the electrode layer was 30% by weight, 10% by weight and 100% by weight, respectively.
- the volume resistance values of these electrode layers are 8.12 ⁇ 10 ⁇ 4 ⁇ ⁇ cm, 6.05 ⁇ 10 ⁇ 4 ⁇ ⁇ cm, and 9.70 ⁇ 10 ⁇ 4.
- the value was lower than the volume resistance value of the elastic resistance heating layer of the example, and 1.0 ⁇ 10 ⁇ 3 ⁇ ⁇ cm or less.
- the heat generating fixing belt according to the embodiment having such characteristics can comprehensively supply a sufficient current from the electrode layer to the elastic resistance heat generating layer. Is possible.
- Example 4 was classified as Category 1 and a small peeling of 5% or less was observed, but it was within the allowable range. About Example 1 and Example 5, it was classification 0 and peeling of an electrode was not observed.
- the temperature distributions of Example 1, Example 4, and Example 5 were ⁇ 8.5 ° C., ⁇ 9.7 ° C., and ⁇ 8.9 ° C., indicating a sufficiently uniform temperature distribution.
- Example 3 The heat-generating fixing belt obtained in Example 1 was incorporated in the image fixing apparatus shown in FIG. 3A, and a toner image fixing test was performed.
- the fixing temperature was set to 190 ° C. with a thermistor for printing. As a result, fixing was possible immediately after the power was turned on, and a good fixed image was obtained.
- Exothermic fixing belt 10. Belt substrate 20. Elastic resistance heating layer 30. Release layer 40. Electrode layer 50. Elastic layer 101.102. Image fixing device 110a. 110b. Core material 210a. 210b. 220. Pressure roll 510a. Electric power feeding part 310.320. Toner 312.322. Toner image 410. Support 420. Target
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Abstract
Description
発熱定着ベルトを作製し、次のように評価を行った。
(1)体積抵抗値の測定
ロレスタGP MCP-T610(三菱化学アナリテック製)を用い、JIS K-7194に準拠した方法で、上述のように成型された弾性抵抗発熱層および電極層の体積抵抗値を測定した。測定は、22±3℃の温度、55±5%RHの環境下に、24時間以上測定サンプルを放置して実施した。
測定系の略図を図4に示す。後述するように得られた各発熱定着ベルトに、外径25mmのシリコーンスポンジロール530を挿入した。発熱定着ベルト1の両端に位置する電極層40a,40bには、金属のベアリングを用いた給電部510a,510bを接触させた。その後、給電部510a,510bを通じて電極層間に電圧を印加した。ここで、シリコーンスポンジロール530はジャーナル540a,540bを介して駆動モーターと連結しており、発熱定着ベルトを回転させることができる。
JIS K 5600-5-1(円筒形マンドレル法)に準拠した方法で、上述のように成型された弾性抵抗発熱層および弾性抵抗発熱層の表面に成型された電極層の耐屈曲性を測定した。測定の概要を図5に示す。マンドレル600は外径5mmを用い、サンプル100をマンドレル600に沿わせて折り曲げた後に、目視で表面のクラックおよび剥離の有無を確認した。測定は、室温環境下(23±5℃)で実施した。
JIS K-5600-5-6(クロスカット法)に準拠した塗膜の付着性の評価方法で、上述の方法により成型された弾性抵抗発熱層と電極層との間の密着性を測定した。試験結果は、剥がれの程度によって、分類0~分類5の6段階で評価した。
上述の方法によって得られた発熱定着ベルトを上述したように図3(a)に示す画像定着装置に組み込み、トナー像の定着テストを行った。定着温度は、サーミスタで190℃に設定し、印刷を行った。
[実施例1]
(1)基材層の成型
外径30mm、全長350mmのステンレス管に、ポリアミド酸(U-ワニス-S、宇部興産社製)を膜厚400μmで塗布した。その後、120℃で60分間乾燥し、200℃の温度まで30分間で昇温させ、200℃で30分間保持した。続けて、380℃まで30分間で昇温させ、380℃で15分間保持してイミド化反応を完了した。その後、室温まで冷却し、ステンレス管を抜取り、端部を切断して、内径30mm、厚み70μm、長さ240mmのポリイミド樹脂のシームレス管状体を得た。
弾性抵抗発熱層材料として用いるフッ素ゴム塗料を以下の方法で準備した。オープンロールでフッ素ゴム(G-501NK、ダイキン工業(株)製)100重量%に、MTカーボンブラック(Thermax(Cancarb Ltd.米国商標登録)N990、Cancarb Ltd.製)を20重量%、酸化マグネシウム(キョーワマグ(協和化学工業(株)登録商標)30、協和化学工業(株)製)を15重量%、アミン系硬化剤と(V-3、ダイキン工業(株)製)を3重量%混練りした。その後、MEKで溶解して、固形分が30%となるようにMEKの量を調整し、フッ素ゴム塗料を得た。このフッ素ゴム塗料にケッチェンブラックのディスパージョン(MHIブラックシリーズ、御国色素(株)製)を混合した。混合量は、固形分中のフッ素ゴム100重量%に対してケッチェンブラック20重量%となるように調整した。
ステンレス管を挿入したポリイミド樹脂基材外周に弾性抵抗発熱層材料をスプレーコートで所望の厚みに塗布した。回転させながら40℃で10分間乾燥させ、硬化前の弾性抵抗発熱層が積層された積層体Aを得た。
電極層材料として、前述したフッ素ゴム塗料と、NMPに溶解したポリイミド溶液(リカコート(新日本理化(株)登録商標)SN-20、新日本理化(株)製)を混合し、そこに銀粒子を添加した。混合量は、固形分中のフッ素ゴムとポリイミド樹脂の合計を100重量%として銀粒子が150重量%となるように調整した。また、フッ素ゴムとポリイミド樹脂の合計100重量%のうち、30重量%がフッ素ゴム、70重量%がポリイミド樹脂となるように調整した。
積層体Aの両端部10mm位置に、電極層材料をブレードコートで所望の厚みに塗布した。回転させながら40℃で10分間乾燥させ、硬化前の抵抗発熱層の両端部に、硬化前の電極層が形成された積層体Bを得た。この積層体Bを恒温槽で150℃1時間、180℃1時間、200℃24時間加熱して硬化させ、基材上に弾性抵抗発熱層および電極層が形成された積層体Cを得た。硬化後の膜厚を測定すると、弾性抵抗発熱層は150μm、電極層は10μmであった。
弾性抵抗発熱層の体積抵抗値は2.56×101Ω・cmであり、測定した40か所の最大値/最小値は1.12倍であった。電極層の体積抵抗値は、8.12×10-4Ω・cmであった。
耐屈曲性の測定を行った。その結果、弾性抵抗発熱層および電極層のいずれも、外径5mmのマンドレルに沿わせて折り曲げても、表面にクラックや剥離などの欠陥は発生しなかった。
電極層と弾性抵抗発熱層との密着性を評価したところ、分類0であり、剥離は見られなかった。
上記積層体Cの両端10mmを除いた中央領域の表面に、プライマー(PrimerNo.4、信越化学工業製)を介して、シリコーンゴム(XE15-B7354、モメンティブ・パフォーマンス・マテリアルズ社製)を塗布した。塗布は、両端10mm部分をマスキングした積層体Cをシリコーンゴム原料中に浸漬し、内径30.65mmのアルミ製リングを外周面に走行させて行った。
上記積層体Dのシリコーンゴム層の表面にプライマー(PJ-CL990、三井デュポンフロロケミカル社製)を介して、フッ素樹脂ディスパージョン(855-510、三井デュポンフロロケミカル社製)をスプレーコートで塗布した。塗布後に、常温で30分間乾燥した後、340℃のオーブンに入れ、15分間焼成した。焼成後の離型層の厚みを測定すると15μmであった。
弾性抵抗発熱層材料において、弾性抵抗発熱層の体積抵抗値が1×103Ω・cmとなるようにケッチェンブラックのディスパージョンの混合量を調整したこと以外は、実施例1と同様にして発熱定着ベルトを作製した。その時の固形分中のフッ素ゴム100重量%に対するケッチェンブラックの混合量は10重量%であり、弾性抵抗発熱層の厚みは、220μmであった。
弾性抵抗発熱層材料において、弾性抵抗発熱層の体積抵抗値が1×10-3Ω・cmとなるようにカーボンナノチューブのディスパージョン(CNTDシリーズ、開発品;御国色素(株)製)の混合量を調整したこと以外は、実施例1と同様にして発熱定着ベルトを作製した。その時の固形分中のフッ素ゴム100重量%に対するカーボンナノチューブの混合量は50重量%であり、抵抗発熱層の厚みは38μmであった。
電極層材料のバインダー成分において、フッ素ゴムとポリイミド樹脂との合計100重量%のうち10重量%がフッ素ゴムであり、90重量%がポリイミド樹脂であるように調整したこと以外は、実施例1と同様にして発熱定着ベルトを作製した。
電極層材料において、バインダー成分をフッ素ゴムのみとしたこと以外は、実施例1と同様にして発熱定着ベルトを作製した。
弾性抵抗発熱層材料において、ポリイミド溶液(リカコートSN-20、新日本理化(株)製)にケッチェンブラックのディスパージョン(MHIブラックシリーズ、御国色素(株)製)を弾性抵抗発熱層の体積抵抗値が、2.5×101Ω・cmとなるように混合量を調整した導電性ポリイミド溶液を用いた。その時の固形分中のケッチェンブラックの混合量はポリイミド樹脂100重量%に対して22重量%であった。これらの弾性抵抗発熱層材料と電極層材料を用いたこと以外は、実施例1と同様に発熱定着ベルトを作製した。この時の抵抗発熱層の厚みは15μmであった。
(1)弾性抵抗発熱層についての評価
実施例1、実施例2および実施例3、並びに比較例の弾性抵抗発熱層について次の評価を行った。測定項目は、体積抵抗値、体積抵抗値のバラツキ、弾性抵抗発熱層の耐屈曲性および発熱温度分布とした。結果を表1に示す。
実施例1で得られた発熱定着ベルトを図3(a)に示す画像定着装置に組み込み、トナー像の定着テストを行った。定着温度は、サーミスタで190℃に設定し、印刷を行った。その結果、電源投入から瞬時に定着が可能であり、良好な定着画像が得られた。
バインダー成分にフッ素ゴムを含み、且つ弾性抵抗発熱層と電極層とで同種類のバインダーを用いた実施例1、実施例2、実施例3、実施例4および実施例5は、何れも耐屈曲性に優れていることが証明された。またこれらの温度分布は何れも均一であった。一方、バインダーにポリイミド樹脂を使用した比較例では、均一な温度分布は得られたものの耐屈曲性に劣っていた。
110a.110b.芯材 210a.210b.220.加圧ロール
510a.給電部 310.320.トナー 312.322.トナー像
410.支持体 420.対象
Claims (11)
- 絶縁性の耐熱性樹脂で形成された管状のベルト基体と、導電性材料を含有し、かつ弾性材料を含む弾性母材で形成された弾性抵抗発熱層と、離型層と、前記弾性抵抗発熱層に給電するための一対の電極層とを備え、
前記弾性抵抗発熱層は、前記ベルト基体の外周面に設けられ、
前記離型層は、最外層として設けられ、
前記一対の電極層は、前記弾性抵抗発熱層の外周面の両側端部に設けられ、かつ前記弾性抵抗発熱層の体積抵抗値よりも低い体積抵抗値を有する
ことを特徴とする発熱定着ベルト。 - 前記弾性抵抗発熱層は、1.0×10-3Ω・cm以上、1.0×103Ω・cm以下の体積抵抗率を有することを特徴とする請求項1に記載の発熱定着ベルト。
- 前記弾性抵抗発熱層と前記離型層との間に弾性層をさらに有し、当該弾性層は前記弾性抵抗発熱層および前記離型層と接していることを特徴とする請求項1又は2に記載の発熱定着ベルト。
- 前記弾性材料は、フッ素ゴム、シリコーンゴム、フルオロシリコーンゴム、水素化ニトリルゴム又はそれらの組み合わせであることを特徴とする請求項1~3いずれか1項に記載の発熱定着ベルト。
- 前記弾性材料、フッ素ゴム単独、フッ素ゴムとシリコーンゴム、フルオロシリコーンゴム若しくは水素化ニトリルゴムとの混合物、フルオロシリコーンゴム単独、又はフルオロシリコーンゴムとシリコーンゴム若しくは水素化ニトリルゴムとの混合物であることを特徴とする請求項4に記載の発熱定着ベルト。
- 前記一対の電極層は、それぞれ、1.0×10-3Ω・cm以下の体積抵抗値を有することを特徴とする請求項1~5いずれか1項に記載の発熱定着ベルト。
- 前記一対の電極層は、それぞれ、金属粒子を含有するバインダーで成形され、
前記バインダーは、前記弾性抵抗発熱層の弾性母材と同種の弾性母材を含み、
前記一対の電極層と前記弾性抵抗発熱層とは、接着剤を介さずに直接結合されていることを特徴とする請求項1~6いずれか1項に記載の発熱定着ベルト。 - 前記弾性母材は、前記弾性材料とは他の耐熱性材料をさらに含むことを特徴とする請求項1~7いずれか1項に記載の発熱定着ベルト。
- 前記耐熱性材料は、ポリフェニレンサルファイド、ポリイミド、ポリアミドイミド、ポリエーテルエーテルケトン又はフッ素樹脂であることを特徴とする請求項8に記載の発熱定着ベルト。
- 耐熱性の弾性材料および硬化剤を含む弾性母材の塗料を調製する工程と、
導電性材料のディスパージョンを調製する工程と、
前記塗料と前記ディスパージョンとを混合して弾性抵抗発熱層材料を得る工程と、
絶縁性の耐熱性樹脂で形成された管状のベルト基体の外周面に弾性抵抗発熱層材料を塗布、乾燥して硬化前の弾性抵抗発熱層を形成する工程と、
前記硬化前の弾性抵抗発熱層の外周面の両側端部に電極材料をそれぞれ塗布し、乾燥し、さらに加熱硬化することにより、前記ベルト基体上に前記導電性材料と前記弾性材料を含有する弾性抵抗発熱層および前記弾性抵抗発熱層の体積抵抗値よりも低い体積抵抗値を有し、当該弾性抵抗発熱層に給電するための一対の電極層を形成する工程と、
最外層に離型層を形成する工程と
を含む発熱定着ベルトの製造方法。 - 支持体上で未定着トナーを加熱して、当該トナー像を形成する画像定着装置であって、請求項1から9までの何れか1項に記載の発熱定着ベルトと、
互いの中心軸が平行であり、当該支持体を周面同士で挟み込むように前記発熱定着ベルトと対向して配置されている加圧ロールと、
前記一対の電極層にそれぞれ給電するように構成された一対の給電部と
を備える画像定着装置。
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EP17769735.6A EP3435168A4 (en) | 2016-03-22 | 2017-02-17 | HEAT-FUSION TAPE, METHOD FOR PRODUCING A HEAT-FIXING TAPE AND BILDFIXING DEVICE |
CN201780018794.6A CN109074021A (zh) | 2016-03-22 | 2017-02-17 | 发热定影带、发热定影带的制造方法及图像定影装置 |
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JP2017173453A (ja) | 2017-09-28 |
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JP6106305B1 (ja) | 2017-03-29 |
EP3435168A4 (en) | 2019-11-13 |
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US10423105B2 (en) | 2019-09-24 |
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