WO2011013824A1 - 電磁誘導発熱体及び定着ベルト - Google Patents
電磁誘導発熱体及び定着ベルト Download PDFInfo
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- WO2011013824A1 WO2011013824A1 PCT/JP2010/062950 JP2010062950W WO2011013824A1 WO 2011013824 A1 WO2011013824 A1 WO 2011013824A1 JP 2010062950 W JP2010062950 W JP 2010062950W WO 2011013824 A1 WO2011013824 A1 WO 2011013824A1
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- electromagnetic induction
- induction heating
- heating element
- heat generating
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D1/00—Electroforming
- C25D1/04—Wires; Strips; Foils
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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
- G03G15/2053—Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/14—Tools, e.g. nozzles, rollers, calenders
- H05B6/145—Heated rollers
Definitions
- the present invention relates to an electromagnetic induction heating element and a fixing belt having an endless belt made of nickel electroforming, and the electromagnetic induction heating element is particularly a fixing belt of a fixing unit of an image forming apparatus such as a copying machine, a facsimile machine, or a laser beam printer. It is suitable for use in.
- an endless fixing belt (endless belt or endless film) is used instead of the fixing roller in order to meet the demands for downsizing, energy saving, printing and copying speed of the image forming apparatus.
- a belt fixing system is adopted.
- a fixing belt excellent in heat generation efficiency that is further energy-saving and raises the temperature to a predetermined temperature with a short start-up time.
- it consists of a base layer made of a metal with a high specific resistance and relative permeability, and a nonmagnetic conductive metal.
- a fixing belt comprising a heat generating layer having a sufficiently lower specific resistance and relative magnetic permeability than the base layer, and a surface release layer (see Patent Document 1).
- Patent Document 2 a method for manufacturing an endless belt that is performed in a non-oxidizing gas atmosphere during the heat treatment of the surface release layer.
- Patent Document 2 a method for manufacturing an endless belt that is performed in a non-oxidizing gas atmosphere during the heat treatment of the surface release layer.
- the heating device has a large structure and requires equipment costs, and it takes time to prepare and replace the non-oxidizing gas, and the cost of the fixing belt is unavoidable. This hindered cost reduction.
- an object of the present invention is to provide an electromagnetic induction heating element and a fixing belt that are both low cost and compatible with high heat generation efficiency and high durability.
- a first aspect of the present invention comprises an endless belt-shaped first heat generating layer made of nickel electroforming, a second heat generating layer made of a nonmagnetic material, and a coating layer having a thickness of 3 ⁇ m or less, In the electromagnetic induction heating element, the first heat generating layer, the second heat generating layer, and the coating layer are laminated in order.
- the coating layer is made of a metal material having a corrosion resistance higher than that of the material of the second heat generation layer. In the induction heating element.
- a third aspect of the present invention is the electromagnetic induction heating element according to the first or second aspect, wherein the coating layer is made of nickel or a nickel alloy.
- the second heat generation layer is obtained by plating. In the heating element.
- the coating layer is obtained by plating. is there.
- the first heat generation layer has a phosphorus content of 0.05% by mass or more and 1% by mass. % Of the electromagnetic induction heating element.
- the second heat generation layer is formed of a material having a smaller specific resistance value than nickel. It is in the electromagnetic induction heating element characterized by having.
- the second heat generation layer has a specific resistance value of 2.8 ⁇ 10 ⁇ 8 ⁇ ⁇
- the electromagnetic induction heating element is formed of a material having a relative permeability of 2 or less and m or less.
- the second heat generation layer is made of gold, copper, silver, or aluminum. It is in the electromagnetic induction heating element.
- the second heat generation layer has a thickness equal to or less than a skin depth. Located in the electromagnetic induction heating element.
- a fixing belt comprising the electromagnetic induction heating element according to any one of the first to tenth aspects, and further comprising a release layer as an outermost layer. is there.
- the fixing belt according to the eleventh aspect wherein the release layer is provided via an elastic layer.
- the endless belt-shaped first heat generating layer made of nickel electroforming, the second heat generating layer made of a nonmagnetic material, and the coating layer having a thickness of 3 ⁇ m or less low cost is achieved.
- an electromagnetic induction heating element and a fixing belt that achieve both high heat generation efficiency and high durability.
- FIG. 1 is a schematic view of a fixing belt according to an embodiment of the present invention.
- FIG. 6 is a schematic view of a fixing belt according to another embodiment of the present invention.
- the electromagnetic induction heating element of the present invention comprises an endless belt-shaped first heating layer made of nickel electroforming, a second heating layer made of a nonmagnetic material, and a coating layer having a thickness of 3 ⁇ m or less.
- the first heat generation layer, the second heat generation layer, and the coating layer are sequentially laminated.
- the electromagnetic induction heating element according to the present invention is composed of only one heat generating layer, because the heat generating layer is composed of a first heat generating layer made of nickel electroforming and a second heat generating layer made of a nonmagnetic material. Compared to the case, the amount of heat generation is increased, the heat generation efficiency is improved, and the warm-up time can be shortened.
- the second heat generating layer is prevented from being oxidized, and the electromagnetic induction heat generating element has excellent durability. Since this coating layer is very thin with a thickness of 3 ⁇ m or less, the heat generation efficiency of the electromagnetic induction heating element is hardly lowered, and the heat generation efficiency is lower than that of the first heat generation layer and the second heat generation layer. However, it functions as a third heat generating layer, and the electromagnetic induction heating element can maintain excellent heat generation efficiency.
- FIG. 1 is a schematic view of a fixing belt provided with an electromagnetic induction heating element of the present invention.
- the fixing belt 10 includes an endless belt-shaped first heat generating layer 11 made of nickel electroforming, a second heat generating layer 12 made of a nonmagnetic material, and a coating layer 13 having a thickness of 3 ⁇ m or less. .
- a release layer 15 is provided on the outer peripheral surface of the coating layer 13 via an elastic layer 14.
- a sliding layer 16 is formed on the inner peripheral surface of the first heat generating layer 11. The fixing belt 10 of this embodiment is used when an exciting coil is provided outside the fixing belt 10.
- the coating layer 13 has a thickness of 3 ⁇ m or less.
- the covering layer 13 is preferably made of a metal material having a corrosion resistance higher than that of the second heat generating layer 12, and examples of the metal material having a corrosion resistance include a metal material that is difficult to oxidize.
- the fixing belt 10 is heated to various temperatures to form the elastic layer 14, the release layer 15, or the sliding layer 16 after manufacturing the first heat generating layer 11 and the second heat generating layer 12. This is because the coating layer 13 can prevent the second heat generating layer 12 from being oxidized at this time. Further, it is possible to prevent the second heat generating layer 12 from being oxidized by moisture contained in the elastic layer 14.
- the coating layer 13 has excellent adhesion between the second heat generating layer 12 and the elastic layer 14 or the release layer 15.
- the material for the covering layer 13 include gold, silver, nickel, nickel alloys, and the like, and nickel and nickel alloys are particularly preferable.
- nickel alloys include Ni—P alloys, Ni—Fe alloys, Ni—Co alloys, Ni—Mn alloys, Ni—Ti alloys, and the like. This is because the adhesiveness to the elastic layer 14 or the release layer 15 is excellent, and the oxidation of the second heat generating layer 12 can be suitably prevented.
- the covering layer 13 is preferably formed before the second heat generating layer 12 is oxidized by being exposed to air, and is more preferably formed without being exposed to air.
- the coating layer 13 before the second heat generating layer 12 is oxidized by exposure to air corrosion of the second heat generating layer 12 can be effectively suppressed.
- oxidation of the second heat generating layer 12 by contact with air or oxidation of the second heat generating layer 12 by moisture contained in the elastic layer 14 is performed. This is because it can be effectively prevented.
- the covering layer 13 is preferably formed by electrolytic plating.
- a plating film may be formed on the surface of the second heat generating layer 12 using a plating bath to form the coating layer 13.
- the coating layer 13 by electrolytic plating, it becomes excellent in adhesion to the second heat generating layer 12, and the coating layer 13 having a thickness of 3 ⁇ m or less can be formed with high accuracy.
- the coating layer 13 consists of nickel, it can obtain by the method similar to the 1st heat generating layer 11 mentioned later.
- the coating layer 13 made of a nickel alloy such as a Ni—P alloy, a Ni—Fe alloy, a Ni—Co alloy, a Ni—Mn alloy, a Ni—Ti alloy or the like is formed in the same manner as the first heat generating layer 11 described later. It can be obtained by appropriately changing the electrodes and the like.
- the covering layer 13 may be formed by electroless plating, physical vapor deposition, chemical vapor deposition, or the like.
- the thickness of the coating layer 13 is 3 ⁇ m or less, preferably 0.5 ⁇ m to 2 ⁇ m. If the thickness is larger than 3 ⁇ m, the heat generation efficiency of the electromagnetic induction heating element is lowered. When the thickness is less than 0.5 ⁇ m, there is a possibility that a sufficient effect of preventing oxidation of the second heat generating layer cannot be obtained.
- the first heat generating layer 11 has an endless belt shape made of nickel electroforming.
- the thickness of the first heat generating layer 11 is preferably 1 ⁇ m to 100 ⁇ m, usually 10 to 100 ⁇ m, preferably 15 to 80 ⁇ m, more preferably 20 to 20 ⁇ m when an electromagnetic induction heating method is used for heating the fixing belt. It is about 60 ⁇ m. If the thickness of the first heat generating layer 11 is less than 1 ⁇ m, the first heat generating layer cannot absorb most of the electromagnetic energy, and the heating efficiency tends to decrease. On the other hand, if the thickness of the first heat generating layer 11 exceeds 100 ⁇ m, the rigidity increases and the flexibility decreases, so that the flexibility is impaired and it tends to be difficult to use as a fixing belt.
- the thickness is most preferably about 30 to 50 ⁇ m.
- the width can be appropriately determined according to the width of a transfer material such as transfer paper.
- the first heat generating layer 11 is made of nickel electroforming.
- Nickel electroforming here is not only nickel electroforming consisting of nickel alone, but also nickel alloy electroforming such as Ni-P alloy, Ni-Fe alloy, Ni-Co alloy, Ni-Mn alloy, Ni-Ti alloy. Is included.
- the first heat generating layer 11 made of nickel electroforming is preferably Ni—P alloy electroforming, and more preferably contains phosphorus in a content of 0.05% by mass or more and 1% by mass or less. . If the phosphorus content in the first heat generating layer 11 made of nickel electroforming is less than 0.05% by mass, the heat fatigue resistance of the first heat generating layer made of nickel electroforming may not be sufficiently improved. If the phosphorus content exceeds 1% by mass, the flexibility of the first heat generating layer made of nickel electroforming may be deteriorated.
- the first heat generating layer 11 made of nickel electroforming is generally electroplated using a nickel electroforming bath such as a watt bath mainly composed of nickel sulfate or nickel chloride or a sulfamic acid bath mainly composed of nickel sulfamate. It can be formed by a casting method.
- the electroforming method is a method of obtaining a product by performing thick plating on the surface of a mother die and peeling it from the mother die.
- a cylinder made of stainless steel, brass, aluminum or the like is used as a matrix, and a nickel plating film can be formed on the surface using a nickel electroforming bath.
- the matrix is a non-conductor such as silicone resin or gypsum
- the conductive treatment is performed by graphite, copper powder, silver mirror, sputtering, or the like.
- a peeling process such as forming a peeling film such as an oxide film, a compound film, or a graphite powder coating film on the surface of the mother mold is performed. Is preferred.
- Nickel electroforming bath contains a nickel ion source, an anodic solubilizer, a pH buffer, and other additives.
- the nickel ion source include nickel sulfamate, nickel sulfate, and nickel chloride.
- the anodic solubilizer nickel chloride plays this role in the Watt bath, and in other nickel baths, ammonium chloride, nickel bromide and the like are used.
- Nickel plating is generally performed in a pH range of 3.0 to 6.2, and a pH buffering agent such as boric acid, formic acid, nickel acetate or the like is used in order to adjust to a desired range during this period.
- a brightener, a pit inhibitor, an internal stress reducer, and the like are used for the purpose of smoothing, prevention of pits, refinement of crystals, reduction of residual stress, and the like.
- a sulfamic acid bath is preferable.
- the composition of the sulfamic acid bath includes nickel sulfamate tetrahydrate 300 to 600 g / L, nickel chloride 0 to 30 g / L, boric acid 20 to 40 g / L, an appropriate amount of surfactant, an appropriate amount of brightener, and the like. Things can be mentioned.
- the pH is 2.5 to 5.0, preferably 3.5 to 4.7.
- the bath temperature is 20 to 65 ° C., preferably 40 to 60 ° C.
- fever layer 11 which consists of nickel alloy electroforming, sulfamines, such as a salt of water-soluble phosphorus containing acid like sodium phosphite, ferrous sulfamate, cobalt sulfamate, manganese sulfamate, etc.
- sulfamines such as a salt of water-soluble phosphorus containing acid like sodium phosphite, ferrous sulfamate, cobalt sulfamate, manganese sulfamate, etc.
- a nickel metal electroforming bath to which an acid metal salt, potassium titanium fluoride or the like is appropriately added may be used.
- the first heat generating layer 11 made of Ni—P alloy electroforming obtained by adding phosphorus to the nickel electroforming bath, particularly nickel sulfamate bath and performing electroforming under the above conditions, has improved heat fatigue resistance. Is done.
- the second heat generating layer 12 is made of a nonmagnetic material.
- the thickness of the second heat generating layer 12 is, for example, 2 to 30 ⁇ m, preferably 5 to 20 ⁇ m.
- the thickness of the second heat generating layer 12 is preferably thinner than that of the first heat generating layer 11. If the thickness of the nonmagnetic material is reduced, the skin resistance value increases, it becomes difficult to generate a counter magnetic field, the magnetic flux easily passes through the inside, and electromagnetic induction heat generation can be performed. If the thickness of the second heat generating layer 12 is increased, a magnetic field is generated when a magnetic flux is applied, a countercurrent flows, and the magnetic flux may not pass through the nonmagnetic material.
- the second heat generating layer 12 preferably has a thickness equal to or less than the skin depth.
- the skin depth here refers to the thickness through which an induced current flows.
- the second heat generating layer is a layer thinner than the skin depth, so that the magnetic flux penetrates.
- the second heat generating layer 12 is preferably made of a nonmagnetic material and has a lower specific resistance value than nickel. By making the second heat generation layer 12 a thin layer made of a material having a smaller specific resistance value than the first heat generation layer, the heat generation amount of the second heat generation layer 12 is increased.
- the second heat generating layer 12 is preferably formed of a material having a specific resistance value of 2.8 ⁇ 10 ⁇ 8 ⁇ ⁇ m or less and a relative permeability of 2 or less.
- the skin depth increases as the relative permeability of the second heat generation layer decreases to 2 or less. Even if the second heat generation layer has a small specific resistance value of 2.8 ⁇ 10 ⁇ 8 ⁇ ⁇ m or less, the thin layer can increase the skin resistance and provide a sufficient amount of heat generation.
- heat can be generated concentrated on the thin second heat generating layer.
- Examples of the material of the second heat generating layer 12 include gold, silver, aluminum, copper, and alloys thereof, and copper is preferable in terms of cost and adhesiveness to the first heat generating layer.
- the second heat generating layer 12 is preferably obtained by electrolytic plating.
- a plating film may be formed on the surface of the first heat generating layer 11 using a plating bath to form the second heat generating layer 12.
- the adhesiveness with the first heat generating layer 11 is excellent.
- the second heat generating layer 12 is made of copper
- a copper plating film is formed using a copper plating bath.
- the copper plating bath include a copper sulfate plating bath, a copper pyrophosphate plating bath, a copper cyanide plating bath, and an electroless copper plating bath.
- a copper sulfate plating bath is preferably used, and copper sulfate 150 to 250 g / L. And sulfuric acid of 30 to 150 g / L, hydrochloric acid of 0.125 to 0.25 ml / L, and those containing an appropriate amount of brightener.
- the second heat generating layer 12 may be formed by an electroless plating method, a physical vapor deposition method, a chemical vapor deposition method, or the like.
- the elastic layer 14 is provided for improving the image quality, but the elastic layer 14 may be provided as necessary, and of course, may not be provided. That is, the release layer 15 may be provided directly on the outer peripheral surface of the coating layer 13.
- the elastic layer 14 is preferably made of a material excellent in heat resistance, and examples thereof include silicone rubber, fluorine rubber, urethane rubber, and silicone rubber is particularly preferable.
- the thickness of the elastic layer 14 is, for example, 20 to 1000 ⁇ m, preferably 50 to 500 ⁇ m.
- the release layer 15 is preferably made of a high-release synthetic resin material, and examples thereof include those made of a fluororesin.
- the thickness of the release layer 15 is, for example, 1 to 150 ⁇ m, preferably 5 to 50 ⁇ m.
- the sliding layer 16 is provided in order to improve the slidability, and may be provided if necessary, and of course may not be provided.
- Examples of the material of the sliding layer 16 include polyimide and fluororesin.
- the thickness of the sliding layer 16 is usually 5 to 100 ⁇ m, preferably 10 to 60 ⁇ m.
- the fixing belt 10 of the present embodiment is suitable when an exciting coil (heat source) is disposed outside the fixing belt 10.
- an endless belt-shaped first heat generating layer 11 made of nickel electroforming in order from the inside of the fixing belt 10, an endless belt-shaped first heat generating layer 11 made of nickel electroforming, a second heat generating layer 12 made of a nonmagnetic material, and a coating layer having a thickness of 3 ⁇ m or less.
- the present invention is not limited to this.
- the exciting coil (heat source) is disposed inside the fixing belt 10, as shown in FIG. 2, the coating layer 13 having a thickness of 3 ⁇ m or less and the second made of a nonmagnetic material are sequentially formed from the inside of the fixing belt 10.
- the heat generating layer 12 is preferably the endless belt-shaped first heat generating layer 11 made of nickel electroforming.
- the electromagnetic induction heating element of the present invention is preferably used for a fixing belt, but can also be used for a transfer / fixing belt for fixing immediately after transfer.
- Example 1 Nickel sulfamate 500 g / L, sodium phosphite 150 mg / L, boric acid 30 g / L, naphthalene-1,3,6-trisulfonate trisodium 1.0 g / L as the primary brightener, secondary gloss
- the desired sulfamic acid phosphoric acid electroforming bath was prepared by adding 20 mg / L of 2-butyne-1,4-diol as an agent.
- the electroforming bath was set at 60 ° C., pH 4.5, a stainless steel cylindrical matrix having an outer diameter of 34 mm as a cathode, depolarized nickel as an anode, and an electric current at a current density of 16 A / dm 2. Casting was performed, and an electrodeposit was formed to a thickness of 50 ⁇ m on the outer peripheral surface of the mother die. The electrodeposit was drawn out from the matrix having the electrodeposit to obtain a first heat generating layer made of nickel phosphorus alloy electroforming having an inner diameter of 34 mm and a thickness of 50 ⁇ m. The first heat generating layer has a phosphorus content of 0.5 mass%.
- the 2nd heat generating layer which consists of the following electrolytic baths was formed. Specifically, first, a desired copper sulfate electrolytic bath was prepared by adding 180 g / L of copper sulfate, 60 g / L of sulfuric acid, 0.04 g / L of thiourea, and 0.8 g / L of molasses. Next, plating is performed at a current density of 5 A / dm 2 using the electrolytic bath at a temperature of 45 ° C., the electrodeposit as a cathode, and phosphorous-containing copper as an anode, and a thickness is formed on the first heating element. A second heat generating layer made of 15 ⁇ m copper was formed. The second heat generating layer had a specific resistance value of 1.7 ⁇ 10 ⁇ 8 ⁇ ⁇ m and a relative permeability of 1.6.
- a coating layer having a thickness of 2 ⁇ m made of a nickel phosphorus alloy was formed by the same method as described above, and this was taken out of the electrolytic bath, and burrs at both ends of the electrodeposit were removed. A three-layer electromagnetic induction heating element was obtained.
- Example 2 An electromagnetic induction heating element of Example 2 was obtained in the same manner as in Example 1 except that the thickness of the coating layer was 0.5 ⁇ m.
- Example 3 An electromagnetic induction heating element of Example 3 was obtained in the same manner as in Example 1 except that the thickness of the coating layer was 3 ⁇ m.
- Comparative Example 1 The electromagnetic induction heating element of Comparative Example 1 was obtained in the same manner as in Example 1 except that the coating layer was not provided.
- Comparative Example 2 An electromagnetic induction heating element of Comparative Example 2 was obtained in the same manner as in Example 1 except that the thickness of the coating layer was 5 ⁇ m.
- Examples 4 to 6 and Comparative Examples 3 and 4 A 300 ⁇ m thick silicone rubber layer is coated on the outer peripheral surface of the electromagnetic induction heating elements of Examples 1 to 3 and Comparative Examples 1 and 2, and further a 30 ⁇ m thick PFA tube is coated with a silicone rubber adhesive. Thus, fixing belts of Examples 4 to 6 and Comparative Examples 3 and 4 were obtained.
- Example 7 Implementation was carried out in the same manner as in Example 1 except that a coating layer having a thickness of 2 ⁇ m made of a Ni—Fe alloy (Ni 22%: Fe 78%) formed by the following method was provided instead of the coating layer made of nickel-phosphorus alloy.
- the electromagnetic induction heating element of Example 7 was used.
- Plating is performed at a current density of 5 A / dm 2 using a bath temperature of 30 ° C. and a pH of 3 for the electrolytic bath, the second heat generating layer as a cathode, and a Ni—Fe alloy (Ni 40%: Fe 60%) as an anode.
- An electrodeposit is formed on the outer peripheral surface of the second heat generating layer to a thickness of 2 ⁇ m, which is taken out from the electrolytic bath, and burrs at both ends of the electrodeposited body are cut off to obtain an electromagnetic induction heating element having a three-layer structure. It was.
- Example 8 Implementation was carried out in the same manner as in Example 1 except that a coating layer having a thickness of 2 ⁇ m made of a Ni—Co alloy (Ni 40%: Co 60%) formed by the following method was provided instead of the coating layer made of nickel phosphorus alloy.
- the electromagnetic induction heating element of Example 8 was used.
- a desired electrolytic bath of cobalt sulfamate was prepared by adding 80 g / L of nickel sulfamate, 16 g / L of cobalt sulfamate, 14 g / L of nickel bromide, and 30 g / L of boric acid.
- Plating is performed at a current density of 5 A / dm 2 with a bath temperature of this electrolytic bath of 50 ° C., pH of 3, the second heat generating layer as a cathode, and a Ni—Co alloy (Ni 75%: Co 25%) as an anode.
- An electrodeposit is formed on the outer peripheral surface of the second heat generating layer to a thickness of 2 ⁇ m, which is taken out from the electrolytic bath, and burrs at both ends of the electrodeposited body are cut off to obtain an electromagnetic induction heating element having a three-layer structure. It was.
- Example 9 Example 2 was the same as Example 1 except that a 2 ⁇ m thick coating layer made of a Ni—Mn alloy (Ni 99.2%: Mn 0.8%) formed by the following method was provided in place of the nickel phosphorus alloy coating layer. Thus, an electromagnetic induction heating element of Example 9 was obtained.
- a 2 ⁇ m thick coating layer made of a Ni—Mn alloy Ni 99.2%: Mn 0.8%) formed by the following method was provided in place of the nickel phosphorus alloy coating layer.
- an electromagnetic induction heating element of Example 9 was obtained.
- Nickel sulfamate 80 g / L, manganese sulfamate 30 g / L, boric acid 30 g / L, and activator 375 g / L were added to prepare a desired manganese sulfamate electrolytic bath.
- Plating is performed at a current density of 4 A / dm 2 with a bath temperature of the electrolytic bath of 55 ° C. and a pH of 3.5, with the second heat generation layer as a cathode and depolarized nickel as an anode, and the second heat generation layer.
- An electrodeposit was formed on the outer peripheral surface of the electrode to a thickness of 2 ⁇ m, taken out from the electrolytic bath, and burrs at both ends of the electrodeposit were cut off to obtain a three-layer electromagnetic induction heating element.
- Example 10 An electromagnetic induction heating element of Example 10 was obtained in the same manner as in Example 1 except that a coating layer made of nickel formed by the following method and having a thickness of 2 ⁇ m was provided instead of the coating layer made of nickel phosphorus alloy.
- a desired sulfamic acid electrolytic bath was prepared by adding 450 g / L of nickel sulfamate, 30 g / L of boric acid, 2 g / L of saccharin, and 0.3 g / L of butynediol.
- This electrolytic bath was plated under a current density of 20 A / dm 2 using a bath temperature of 50 ° C., a pH of 4.5, and depolarized nickel as an anode, and an electrodeposit on the outer peripheral surface of the second heat generating layer.
- a bath temperature of 50 ° C., a pH of 4.5, and depolarized nickel as an anode was removed from the electrolytic bath, and burrs at both ends of the electrodeposit were cut off to obtain a three-layer electromagnetic induction heating element.
- Example 11 to 14 A silicone rubber layer having a thickness of 300 ⁇ m was coated on the outer peripheral surface of the electromagnetic induction heating elements of Examples 7 to 10, and a PFA tube having a thickness of 30 ⁇ m was further coated with a silicone rubber-based adhesive. Fixing belt.
- Test Example 1 Heat generation test The electromagnetic induction heating elements obtained in Examples 1 to 3 and Examples 7 to 10 and Comparative Examples 1 and 2 were used in an IH cooker KZ-PH30P manufactured by Panasonic Corporation. The exothermic test was conducted.
- Each electromagnetic induction heating element was cut into a test piece having a size of 100 mm ⁇ 120 mm, and this test piece was placed in the center of the cooking device. Then, a 2000 ml beaker containing 500 ml of pure water and a temperature sensor was placed right above the test piece, heated at a frequency of 20 KHz and an input power of 700 W, and the time for the pure water to change from 35 ° C. to 100 ° C. was measured. . Each measurement was performed five times, and the average value was defined as time. The measurement results are shown in Table 1.
- the obtained fixing belt was incorporated in the printer and subjected to an idling test for 200 hours at a set temperature of 200 ° C. by electromagnetic induction heating.
- the state of the fixing belt after 200 hours was observed to evaluate durability.
- the case where there was no peeling was marked with ⁇ , and the case where peeling occurred was marked with x.
- the results are shown in Table 2.
- the electromagnetic induction heating elements of Examples 1 to 3 and Examples 7 to 10 have a heating time of 100 ° C. for 415 seconds or less, and the heating efficiency is comparable to that of Comparative Example 1 in which no coating layer is provided. It was excellent. In addition, the fixing belt obtained using these has excellent durability. That is, the electromagnetic induction heating element of the present invention was excellent in heat generation efficiency and durability.
- Comparative Example 2 where the thickness of the coating layer was 5 ⁇ m, the time to reach 100 ° C. was 436 seconds, and the decrease in heat generation efficiency was large. Further, the fixing belt of Comparative Example 3 obtained by using Comparative Example 1 in which the coating layer was not provided was peeled off and inferior in durability.
- the nonmagnetic metal layer As described above, by coating the outer peripheral surface of the nonmagnetic metal layer with a thickness of 3 ⁇ m or less, the nonmagnetic metal layer is protected and has excellent durability, and the heat generation efficiency due to induction heating is almost reduced. It was found that an electromagnetic induction heating element and a fixing belt having both high heat generation efficiency and high durability can be obtained.
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Abstract
Description
スルファミン酸ニッケルを500g/L、亜リン酸ナトリウムを150mg/L、硼酸を30g/L、一次光沢剤としてナフタレン-1,3,6-トリスルホン酸三ナトリウムを1.0g/L、二次光沢剤として2-ブチン-1,4-ジオールを20mg/L添加して、所望のスルファミン酸リン電鋳浴を調製した。
被覆層の厚さを0.5μmとした以外は実施例1と同様にして、実施例2の電磁誘導発熱体とした。
被覆層の厚さを3μmとした以外は実施例1と同様にして、実施例3の電磁誘導発熱体とした。
被覆層を設けなかった以外は実施例1と同様にして、比較例1の電磁誘導発熱体とした。
被覆層の厚みを5μmとした以外は実施例1と同様にして、比較例2の電磁誘導発熱体とした。
実施例1~3及び比較例1~2の電磁誘導発熱体の外周面に厚さ300μmのシリコーンゴム層を被覆し、さらにシリコーンゴム系の接着剤を介して厚さ30μmのPFAチューブを被覆して実施例4~6、比較例3,4の定着ベルトとした。
ニッケルリン合金からなる被覆層の代わりに、下記の方法により形成したNi-Fe合金(Ni22%:Fe78%)からなる厚さ2μmの被覆層を設けた以外は実施例1と同様にして、実施例7の電磁誘導発熱体とした。
スルファミン酸ニッケル四水塩を125g/L、スルファミン酸第一鉄を185g/L、酢酸ナトリウムを27g/L、塩化ニッケルを陽極の電解に必要な量添加して、所望のスルファミン酸鉄電解浴を調整した。
ニッケルリン合金からなる被覆層の代わりに、下記の方法により形成したNi-Co合金(Ni40%:Co60%)からなる厚さ2μmの被覆層を設けた以外は実施例1と同様にして、実施例8の電磁誘導発熱体とした。
スルファミン酸ニッケルを80g/L、スルファミン酸コバルトを16g/L、臭化ニッケルを14g/L、および硼酸を30g/L添加して、所望のスルファミン酸コバルトの電解浴を調製した。
ニッケルリン合金からなる被覆層の代わりに、下記の方法により形成したNi-Mn合金(Ni99.2%:Mn0.8%)からなる厚さ2μmの被覆層を設けた以外は実施例1と同様にして、実施例9の電磁誘導発熱体とした。
スルファミン酸ニッケルを80g/L、スルファミン酸マンガン30g/L、硼酸を30g/L、活性剤を375g/L添加して、所望のスルファミン酸マンガン電解浴を調製した。
ニッケルリン合金からなる被覆層の代わりに、下記の方法により形成したニッケルからなる厚さ2μmの被覆層を設けた以外は実施例1と同様にして、実施例10の電磁誘導発熱体とした。
スルファミン酸ニッケルを450g/L、硼酸を30g/L、サッカリンを2g/L、ブチンジオールを0.3g/L添加して、所望のスルファミン酸電解浴を調製した。
実施例7~10の電磁誘導発熱体の外周面に厚さ300μmのシリコーンゴム層を被覆し、さらにシリコーンゴム系の接着剤を介して厚さ30μmのPFAチューブを被覆して実施例11~14の定着ベルトとした。
実施例1~3及び実施例7~10、比較例1,2で得られた電磁誘導発熱体をパナソニック(株)製のIH調理器 KZ-PH30Pに使用して以下の発熱試験を行なった。
(試験例2)耐久試験
実施例4~6及び実施例11~14、比較例3,4にて得られた定着ベルトを、プリンター(Color Laser Jet 5550dn;HP社製)に組み込んで、以下の耐久試験を行なった。
実施例1~3及び実施例7~10の電磁誘導発熱体は、100℃となる時間が415秒以下であり、被覆層を設けていない比較例1と同程度の発熱効率であり、発熱効率に優れるものであった。また、これらを用いて得た定着ベルトは、耐久性に優れるものであった。すなわち、本発明の電磁誘導発熱体は、発熱効率に優れ、耐久性に優れるものであった。
11 第1の発熱層
12 第2の発熱層
13 被覆層
14 弾性層
15 離型層
16 摺動層
Claims (12)
- ニッケル電鋳からなる無端ベルト状の第1の発熱層と、非磁性材料からなる第2の発熱層と、厚さ3μm以下の被覆層とを具備し、前記第1の発熱層、前記第2の発熱層、及び前記被覆層が順に積層されていることを特徴とする電磁誘導発熱体。
- 請求項1に記載の電磁誘導発熱体において、前記被覆層は、前記第2の発熱層の材料よりも耐食性を有する金属材料からなることを特徴とする電磁誘導発熱体。
- 請求項1又は2に記載の電磁誘導発熱体において、前記被覆層は、ニッケル又はニッケル合金からなることを特徴とする電磁誘導発熱体。
- 請求項1~3のいずれか一項に記載の電磁誘導発熱体において、前記第2の発熱層はメッキにより得たものであることを特徴とする電磁誘導発熱体。
- 請求項1~4のいずれか一項に記載の電磁誘導発熱体において、前記被覆層はメッキにより得たものであることを特徴とする電磁誘導発熱体。
- 請求項1~5のいずれか一項に記載の電磁誘導発熱体において、前記第1の発熱層は、リンの含有率が0.05質量%以上、1質量%以下であることを特徴とする電磁誘導発熱体。
- 請求項1~6のいずれか一項に記載の電磁誘導発熱体において、前記第2の発熱層は、ニッケルよりも固有抵抗値が小さい材料から形成されていることを特徴とする電磁誘導発熱体。
- 請求項1~7のいずれか一項に記載の電磁誘導発熱体において、前記第2の発熱層は、固有抵抗値が2.8×10-8Ω・m以下で且つ比透磁率が2以下の材料から形成されていることを特徴とする電磁誘導発熱体。
- 請求項1~8のいずれか一項に記載の電磁誘導発熱体において、前記第2の発熱層は、金、銅、銀、又はアルミニウムからなることを特徴とする電磁誘導発熱体。
- 請求項1~9のいずれか一項に記載の電磁誘導発熱体において、前記第2の発熱層は、厚みが表皮深さ以下であることを特徴とする電磁誘導発熱体。
- 請求項1~10のいずれか一項に記載の電磁誘導発熱体を具備し、さらに、最外層として離型層を具備することを特徴とする定着ベルト。
- 請求項11に記載の定着ベルトにおいて、前記離型層は、弾性層を介して設けられていることを特徴とする定着ベルト。
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CN2010800349879A CN102474915A (zh) | 2009-07-31 | 2010-07-30 | 电磁感应发热体及固定带 |
JP2011524864A JP5761518B2 (ja) | 2009-07-31 | 2010-07-30 | 電磁誘導発熱体及び定着ベルト |
US13/377,302 US20120080423A1 (en) | 2009-07-31 | 2010-07-30 | Electromagnetic induction heating element and fixing belt |
US14/858,182 US9745664B2 (en) | 2009-07-31 | 2015-09-18 | Method for producing a fixation belt |
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US13/377,302 A-371-Of-International US20120080423A1 (en) | 2009-07-31 | 2010-07-30 | Electromagnetic induction heating element and fixing belt |
US14/858,182 Continuation US9745664B2 (en) | 2009-07-31 | 2015-09-18 | Method for producing a fixation belt |
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US20160010234A1 (en) | 2016-01-14 |
JPWO2011013824A1 (ja) | 2013-01-10 |
US20120080423A1 (en) | 2012-04-05 |
US9745664B2 (en) | 2017-08-29 |
CN105188174A (zh) | 2015-12-23 |
CN102474915A (zh) | 2012-05-23 |
JP5761518B2 (ja) | 2015-08-12 |
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