WO2024106007A1 - Élément revêtu et cuiseur ou ustensile de cuisson comprenant celui-ci - Google Patents

Élément revêtu et cuiseur ou ustensile de cuisson comprenant celui-ci Download PDF

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Publication number
WO2024106007A1
WO2024106007A1 PCT/JP2023/034166 JP2023034166W WO2024106007A1 WO 2024106007 A1 WO2024106007 A1 WO 2024106007A1 JP 2023034166 W JP2023034166 W JP 2023034166W WO 2024106007 A1 WO2024106007 A1 WO 2024106007A1
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WIPO (PCT)
Prior art keywords
coating
layer
substrate
coating member
metal
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Application number
PCT/JP2023/034166
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English (en)
Japanese (ja)
Inventor
武央 頭川
千恵 平井
佑紀 岩崎
Original Assignee
パナソニックＩｐマネジメント株式会社
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Priority claimed from JP2023002049A external-priority patent/JP2024071321A/ja
Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Publication of WO2024106007A1 publication Critical patent/WO2024106007A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/16—Antifouling paints; Underwater paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/04—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings of inorganic non-metallic material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/10—Tops, e.g. hot plates; Rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/02—Stoves or ranges heated by electric energy using microwaves
    • 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
    • H05B6/12—Cooking devices

Definitions

  • This disclosure relates to coated members and cooking appliances and cooking utensils, such as microwave ovens, that use the same.
  • a method is known in which glass is coated with a photocatalyst to improve its stain resistance.
  • glass is known that increases the amount of B2O3 in the glass to improve scratch and crack resistance, while reducing the amount of alkali metal oxides in the glass and maintaining photocatalytic activity when a titanium oxide photocatalyst is supported on the surface (see Patent Document 3).
  • ceramic coatings may not have strong anti-adhesive properties, and may be prone to stains.
  • alkali metals such as Na in the glass substrate act as inhibitors of titanium oxide photocatalytic coating. If the substrate contains a large amount of alkali metals or alkali metal oxides, the titanium oxide photocatalytic coating cannot be effective. To achieve the desired effect of titanium oxide photocatalytic coating, it is necessary to add a barrier film against alkali metals, such as a SiO2 film, between the substrate and the titanium oxide photocatalytic coating.
  • a barrier film against alkali metals such as a SiO2 film
  • the present invention aims to solve the above-mentioned problems of the conventional technology and provide a coating material that makes it easier to remove substances that have adhered to the surface.
  • the coating member in one embodiment of the present invention is a coating member that is composed of a substrate and a coating layer that covers all or part of the substrate surface, and at least one of the metal ions and metals contained in the substrate migrates to the coating layer.
  • the coating member in another embodiment of the present invention is a coating member that comprises a substrate and two or more coating layers that cover all or part of the substrate surface, and in which at least one of metal ions and metals migrates from the lower coating layer to the upper coating layer.
  • metal ions contained in the substrate or coating layer act on substances (dirt, etc.) adhering to the coating member, making it easier to remove the substances adhering to the surface of the coating member.
  • FIG. 11 is another schematic cross-sectional view showing a change in state of the coating member in the second embodiment.
  • the inventors investigated various materials that can be used even at high temperatures, and discovered that a certain material composition makes it easier for dirt to peel off, which led to the configuration of the embodiment disclosed herein.
  • oil and other dirt components react with metal components, making the dirt easier to peel off, improving cleaning performance.
  • metal components migrate from the substrate or undercoat layer to the topcoat layer, and pass through the topcoat layer until they reach the surface.
  • Figure 1A is a schematic cross-sectional view of a coating member in the first embodiment.
  • Figure 1B is a schematic cross-sectional view showing a change in state of the coating member in the first embodiment.
  • a coating member 100 comprises a substrate 110 and a coating layer 120 .
  • the substrate 110 contains metal ions 130 (the metal ions may be metals or metal oxides) that can move through the substrate.
  • the substrate 110 contains, for example, soda glass containing sodium ions.
  • the substrate 110 may also be enamel that contains a steel material and a glass layer containing metal ions arranged on the steel material.
  • the coating layer 120 may further include a metal oxide such as silica, titanium oxide, magnesium oxide, zirconium oxide, or tungsten oxide, or a composite thereof.
  • the coating layer 120 may further include an additive containing a metal or a metal oxide or a composite thereof.
  • the metal may be, for example, one or more of Li, Na, K, Mg, Ca, Sr, Ba, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Fe, Co, Ni, Pd, Pt, Cu, Ag, Au, Zn, Al, Ga, In, etc.
  • the coating layer 120 may further include an additive containing a nonmetallic element.
  • the coating layer 120 covers all or a part of the surface of the substrate 110.
  • the alkali metals are Li, Na, and K.
  • the substrate 110 may also contain Li. In this case, the effect is achieved if the substrate 110 contains 1 mol% or more of Li, but 10 mol% or more is even better.
  • the specific method for forming the coating layer 120 is not particularly limited, and various known methods can be used. Representative methods include known coating methods in which a coating agent containing a metal or metal oxide is prepared and then applied, such as spray coating, spin coating, dip coating, roll coating, bar coating, gravure coating, screen printing, brush coating, squeegee coating, and sponge coating, as well as deposition such as CVD (Chemical Vapor Deposition) and PVD (Physical Vapor Deposition), sputtering, plating, etc., but are not particularly specified.
  • CVD Chemical Vapor Deposition
  • PVD Physical Vapor Deposition
  • the coating layer 120 When applying the coating layer 120 to the substrate 110, it is also possible to carry out known pretreatments to improve adhesion, such as applying a primer, making the surface hydrophilic, corona treatment, degreasing, etc.
  • adhesions 140 such as oil, seasonings, food, etc. adhere to the surface of the coating layer 120 and are heated and burnt. Alternatively, the adhesions 140 are unintentionally burnt to the coating member 100.
  • the substrate 110 contains metal ions 130.
  • the metal ions 130 migrate from the substrate 110 to the coating layer 120, move through the coating layer 120, and reach the vicinity of the surface of the coating layer 120.
  • the mechanism of movement is thought to be grain boundary diffusion or movement of an amorphous layer, but is not limited to these.
  • the deposits 140 can be easily removed. This is considered to be the result of the metal ions 130 and the deposits 140 bonding together or the substance to which the deposits 140 are attached changing into a substance that dissolves in water, but this is not a limitation.
  • the amount of alkali metal in the oil increases at the interface between the oil and the coating layer 120, and it is believed that the presence of moisture improves the removability of the oil.
  • the movement of metal ions in the coating material is accelerated in products and areas where the temperature is rising, and the reaction is also accelerated if the coating layer reacts with adherent substances, so it is desirable to heat the product or area to a high temperature, preferably 200°C or higher, more preferably 250°C or higher, and even more preferably 300°C or higher.
  • the coated member, cooking appliance, and cooking utensil of the present invention have excellent removability of stains, particularly stains caused by burning at high temperatures.
  • a titanium oxide coating solution was spray-coated onto the soda glass, and then it was baked at 300°C for 2 hours or at 600°C for 30 minutes.
  • the Na (sodium) content in the soda glass was approximately 14% as Na2O (sodium oxide).
  • Salad oil or a mixture of soy sauce, mirin, and sugar as seasoning liquid was dropped onto the coated member 100 prepared as described above, and the mixture was allowed to scorch in an oven at approximately 300°C for 30 minutes. After that, the coated member 100 was removed from the oven, and it was confirmed that the scorched salad oil or scorched seasoning liquid could be easily removed by immersing the coated member 100 in water or wiping it with a cloth moistened with water.
  • the distribution of Na in the depth direction of the scorched salad oil (adhered portion 140), the coating layer 120, and the soda glass (substrate 110) was confirmed while performing sputtering using TOF-SIMS (time-of-flight secondary ion mass spectrometry). As a result, it was confirmed that the Na in the soda glass migrated to the coating layer 120 and then to the salad oil.
  • TOF-SIMS time-of-flight secondary ion mass spectrometry
  • a coating member 200 is composed of a substrate 210 and a coating layer 240.
  • the coating layer 240 is composed of a base layer 220 as a lower coating layer and a topcoat layer 230 as an upper coating layer.
  • the undercoat layer 220 covers all or part of the substrate 210.
  • the topcoat layer 230 covers all or part of the undercoat layer 220.
  • the undercoat layer 220 contains metal ions 250 (which may be metals or metal oxides) that are mobile within the undercoat layer 220.
  • the substrate 210 is not particularly specified, and may be metals such as SUS (stainless steel), aluminum, titanium, copper, iron, steel, galvanized steel sheet, aluminum-plated steel sheet, galvalume steel sheet (registered trademark), or glass such as soda glass, crystallized glass, borosilicate glass, tempered glass, quartz glass, or ceramics, or may be coated, surface-treated, or painted to improve heat resistance, corrosion resistance, wear resistance, or design. Alternatively, it may be a resin depending on the temperature range of use. Also, as shown in Figures 3A and 3B, the substrate 210 may be enamel including steel material 210a and glass layer 210b coated on the steel material 210a.
  • the undercoat layer 220 is a layer capable of supplying metal ions and the like to at least the topcoat layer 230, and is, for example, composed of a glass coating.
  • the undercoat layer 220 may be coated with glass paste, ceramic paint, enamel, or the like, or may be coated with sodium silicate, lithium silicate, potassium silicate, or the like.
  • the undercoat layer 220 may contain at least one of metal, metal oxide, and metal ions.
  • the undercoat layer 220 may be composed of an inorganic coating film containing at least one of metal, metal oxide, and metal ions.
  • the undercoat layer 220 may be composed of an organic coating film formed by coating silicone paint, fluorine paint, acrylic paint, urethane paint, or the like containing at least one of metal, metal oxide, and metal ions.
  • the undercoat layer 220 may be composed of an organic-inorganic hybrid film to which metal or metal ions have been added.
  • the base material 210 may also contain at least one of metal, metal oxide, and metal ions.
  • undercoat layer 220 When applying the undercoat layer 220 to the substrate 210, it is also possible to carry out known pretreatments to improve adhesion, such as primer application, hydrophilic treatment, corona treatment, plasma treatment, degreasing, etc.
  • the topcoat layer 230 may also contain at least one metal oxide, such as silica, titanium oxide, magnesium oxide, zirconium oxide, or tungsten oxide. It may also contain additives containing metals, metal ions, metal oxides, or composites thereof. Examples of such metals include one or more metals, metal ions, or metal oxides, such as Li, Na, K, Mg, Ca, Sr, Ba, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Fe, Co, Ni, Pd, Pt, Cu, Ag, Au, Zn, Al, Ga, and In. It may also contain additives containing nonmetallic elements.
  • the underlayer 220 may also contain Li. In this case, the underlayer 220 is effective if it contains 1 mol% or more of Li, but it is better if it contains 10 mol% or more.
  • the base layer 220 and the topcoat layer 230 may each be one layer or two or more layers. Furthermore, in the case of multiple layers, as long as the effect of the base layer 220 can be exerted, each layer of the base layer 220 may be made of the same material or different materials. Furthermore, as long as the effect of the topcoat layer 230 can be exerted, each layer of the topcoat layer 230 may be made of the same material or different materials.
  • the specific method of forming (painting) the undercoat layer 220 or the topcoat layer 230 is not particularly limited, and various known methods can be used.
  • Representative methods of formation include known coating methods in which a coating agent containing a metal or metal oxide is prepared and then applied, such as spray coating, spin coating, dip coating, roll coating, bar coating, gravure coating, screen printing, brush coating, squeegee coating, sponge coating, etc., or deposition such as CVD and PVD, sputtering, plating, etc., but are not particularly specified.
  • topcoat layer 230 When applying the topcoat layer 230 to the base layer 220, it is also possible to carry out known pretreatments to improve adhesion, such as primer application, hydrophilic treatment, corona treatment, plasma treatment, degreasing, etc.
  • the coating member 200 includes a topcoat layer 230 formed on its surface.
  • an attachment 260 such as oil, seasoning, food, etc.
  • adheres to the topcoat layer 230 it is heated and scorches.
  • the attachment 260 is unintentionally scorched to the coating member 200.
  • Metal ions 250 are contained in the underlayer 220. These metal ions 250 migrate from the underlayer 220 to the topcoat layer 230, move through the topcoat layer 230, and reach the vicinity of the surface of the topcoat layer 230. The mechanism of migration is unclear, and is thought to be grain boundary diffusion or migration of an amorphous layer, but is not limited to this.
  • the base material 210 contains at least one of a metal, metal oxide, and metal ion, as does the underlayer 220, the metal ions contained in the base material 210 will migrate from the base material 210 to the underlayer 220, and the metal ions 250 contained in the underlayer 220 will migrate from the underlayer 220 to the topcoat layer 230, move through the topcoat layer 230, and reach the vicinity of the surface of the topcoat layer 230.
  • the deposits 260 can be easily removed. This may be because the metal ions 250 and the deposits 260 have bonded together, or the attached substance has changed into a substance that dissolves in water, but this is not a specific reason.
  • the interior walls of cooking appliances such as microwave ovens, oven ranges, and toasters, as well as on the top plates and grill interiors of gas stoves and induction cooking heaters, and on the heating surfaces of hot plates.
  • cooking utensils such as frying pans and pots.
  • products and parts that are used in high-temperature environments such as industrial furnaces that reach high temperatures, and the high-temperature parts of automobiles, motorcycles, and aircraft.
  • the movement of metal ions in the coating film is accelerated in products and areas where the temperature is rising, and the reaction is also accelerated if the coating film reacts with adherent substances, so it is desirable to heat the product or area to a high temperature, preferably 200°C or higher, more preferably 250°C or higher, and even more preferably 300°C or higher.
  • the metal ions 250 it is desirable for the metal ions 250 to be easily diffused by heat.
  • Li which has an ionic radius smaller than its congeners Na and K, diffuses more easily through the coating member 200 than its congeners Na and K, which have an ionic radius larger than Li, and more ions move onto the topcoat layer 230. For this reason, when Li is used as the metal ion, the antifouling effect is greater than when other ions are used.
  • the metal ions 250 exert their anti-fouling effect by binding to the deposits 260, the metal ions contributing to the anti-fouling effect decrease each time an attachment is attached and removed. This decrease causes the anti-fouling effect to gradually decrease as attachment and removal are repeated.
  • Li is used as the metal ions 250, Li is easily diffused, so even if the metal ions 250 decrease due to the attachment and removal of the deposits 260 to the coating member 200, they are easily supplied from the base layer 220. For this reason, when Li is used as the metal ions 250, the anti-fouling effect and its lifespan can be extended.
  • the material for the base layer 220 is preferably smooth and allows the metal ions 250 to move easily.
  • glass can be made into a paste, applied, and then fired to form a smooth base layer, and the bonding between the constituent elements is incomplete, allowing the metal ions to move easily. For this reason, by using a raw material for the desired metal ions as the glass material, a smooth base layer 220 containing the metal ions 250 can be formed.
  • the base material 210 is an enamel that includes a steel material 210a and a glass layer 210b that covers the steel material 210a. If the thermal expansion coefficients of the underlayer 220 and the base material 210 are significantly different, the underlayer 220 is likely to peel off or crack from the base material 210.
  • the underlayer 220 of a glass material that contains a large amount of metal ions 250 is formed on the glass layer 210b of the enamel, and since the base material 210 and the underlayer 220 are both made of glass materials and have similar thermal expansion coefficients, a smooth underlayer 220 with high adhesion can be formed.
  • the coated member, cooking appliance, and cooking utensil of the present invention have excellent removability of stains, particularly stains caused by burning at high temperatures.
  • Example 2 The material of the substrate 210 was crystallized glass, the material of the underlayer 220 was a sodium silicate solution, and the material of the topcoat layer 230 was a solution whose main component was titanium oxide.
  • a coating solution of approximately 32% sodium silicate solution diluted with water was applied to the crystallized glass by dipping, and then dried at room temperature. After that, approximately 1% titanium oxide coating solution was spray-coated, and then dried at room temperature.
  • Salad oil or a mixture of soy sauce, mirin, and sugar as seasoning liquid was dripped onto the coated member 200 prepared as described above, and the member was allowed to scorch in an oven at approximately 300°C for 30 minutes. After that, the coated member 200 was removed from the oven, and it was confirmed that the burnt salad oil or burnt seasoning liquid could be easily removed by wiping the coated member 200 with a cloth moistened with water.
  • Example 3 An aluminum-plated steel plate was used as the substrate 210 (SUS430 (stainless steel containing 16% or more of chromium) or an aluminum-plated steel plate coated with silicone resin may also be used as the substrate 210), a layer coated with a sodium silicate solution was used as the material for the undercoat layer 220, and a titanium oxide solution whose main component is titanium oxide was used as the material for the topcoat layer 230.
  • SUS430 stainless steel containing 16% or more of chromium
  • silicone resin may also be used as the substrate 210
  • a layer coated with a sodium silicate solution was used as the material for the undercoat layer 220
  • a titanium oxide solution whose main component is titanium oxide was used as the material for the topcoat layer 230.
  • a 32% solution of sodium silicate was spray-coated onto an aluminum-plated steel plate and then dried at room temperature.
  • a titanium oxide solution was then spray-coated onto the plate, and the plate was then baked at 300°C for 1 hour.
  • Salad oil or a mixture of soy sauce, mirin, and sugar as seasoning liquid was dripped onto the coating member 200 prepared as described above, and the mixture was scorched in an oven at approximately 250°C for 30 minutes. After that, the coating member 200 was removed from the oven, and it was confirmed that the burnt salad oil or burnt seasoning liquid could be easily removed by wiping the coating member 200 with a cloth moistened with water.
  • Example 4 An alumina plate was used as the substrate 210, a low melting point glass paste containing Na2O was used as the material for the underlayer 220, and a solution of titanium oxide to which a metal element different from titanium oxide (non-titanium metal element) was added was used as the material for the topcoat layer 230.
  • a glass paste was screen printed onto an alumina plate and then baked at 600°C for 10 minutes.
  • the plate was then dipped into a solution of titanium oxide with a different metal element (non-titanium metal element) added, and baked at 300°C for 1 hour.
  • Salad oil or a mixture of soy sauce, mirin, and sugar as seasoning liquid was dripped onto the coating member 200 prepared as described above, and the mixture was allowed to scorch in an oven at approximately 300°C for 30 minutes. It was then confirmed that the oil or seasoning liquid could be easily removed by immersing the coating member 200 in water. It was also confirmed that mayonnaise, curry roux, etc. could be easily removed in a similar manner.
  • Example 5 An alumina plate was used as the substrate 210, a glass paste similar to that used in Example 4 was used as the material for the underlayer 220, to which soda glass powder was mixed so that the amount of Na2O in the underlayer 220 became approximately 15%, and a solution of titanium oxide to which a metal element different from titanium oxide (non-titanium metal element) was added was used as the material for the topcoat layer 230.
  • a glass paste containing soda glass powder was screen printed onto an alumina plate, and then baked at 600°C for 10 minutes. After that, a solution of titanium oxide with a different metal element (non-titanium metal element) was spray-coated onto the plate, and the plate was baked at 300°C for 1 hour.
  • Salad oil or a mixture of soy sauce, mirin, and sugar as seasoning liquid was dropped onto the coating member 200 prepared as described above, and the mixture was scorched in an oven at about 300°C for 30 minutes. After that, the coating member 200 was removed from the oven and wiped with a cloth moistened with water. It was confirmed that the scorched salad oil or scorched seasoning liquid was easier to remove than in Example 4.
  • the undercoat layer 220 was formed by printing the glass paste by screen printing and baking at 600°C for 10 minutes. Then, a titanium oxide solution was spray-coated and baked at 500°C for 1 hour. Note that the effect is exhibited if Li is contained at 1 mol% or more, but 10 mol% or more is even better.
  • Salad oil or a mixture of soy sauce, mirin, and sugar as seasoning liquid was dropped onto the coating member 200 prepared as described above, and the mixture was allowed to scorch in an oven at approximately 300°C for 30 minutes. After that, the coating member 200 was removed from the oven and wiped with a cloth dampened with water. It was confirmed that the scorched salad oil or scorched seasoning liquid was easier to remove than in Example 5. The same experiment of scorching and wiping off the salad oil was also repeated to confirm the effective lifespan. In this case, it was confirmed that the effective lifespan was longer than in Example 5.
  • Example 7 The substrate 210 was enamel made of a steel material having a glass layer formed thereon, and a base layer 220 and a top coat layer 230 were formed on the substrate using the same materials as in Example 6.
  • Salad oil or a mixture of soy sauce, mirin, and sugar as seasoning liquid was dropped onto the coating member 200 prepared as described above, and the mixture was allowed to scorch in an oven at approximately 300°C for 30 minutes. After that, the coating member 200 was removed from the oven and wiped with a cloth dampened with water. It was confirmed that the scorched salad oil or scorched seasoning liquid could be removed as easily as in Example 6. The same experiment of scorching and wiping off the salad oil was also repeated to confirm the effective lifespan. In this case, it was confirmed that the effective lifespan was the same as in Example 6.
  • Example 1 Crystallized glass was used as the substrate, and the same titanium oxide coating solution as used in Example 1 or Example 2 was applied as the topcoat layer by spray coating, followed by baking at 300° C. for 2 hours.
  • Salad oil was dropped onto the coated member prepared as described above and scorched in an oven at approximately 300°C for 30 minutes. After that, it was removed and immersed in water or wiped off with a cloth soaked in water, but the scorched salad oil could not be removed.
  • Example 2 The substrate was SUS430, and the topcoat layer was a solution of titanium oxide similar to that in Example 4 to which a metal element different from titanium oxide (non-titanium metal element) had been added.
  • SUS430 was spray-coated with a solution of titanium oxide with other metal elements added, and then baked at 300°C for 1 hour. The amount of Na in the SUS430 was almost zero.
  • Oleic acid or a mixture of soy sauce, mirin, and sugar as seasoning was dripped onto the coating member 200 prepared as described above, and the mixture was charred in an oven at approximately 300°C for 30 minutes. After that, the product was immersed in water, but the charred oil or seasoning could not be removed.
  • the steam function is effective if the steam is superheated at 200°C or higher. Superheated steam at 250°C or higher is even better.
  • the surface of the coating member is formed in an area that is heated to 200°C or higher, so it can achieve the above effects.
  • cooking appliances and cooking utensils using the coating member of the present invention have excellent removability of stains, particularly stains caused by burning at high temperatures.
  • the coating member of the first invention is a coating member consisting of a substrate and a coating layer that covers all or part of the surface of the substrate, and at least one of the metal ions and metals contained in the substrate migrates to the coating layer.
  • the coating member of the second invention is the same as that of the first invention, in that at least one of the metal ions and metals contained in the coating member migrates to the deposits adhering to the surface of the coating layer, thereby improving the removability of the deposits.
  • the coating member of the third invention is a coating member consisting of a substrate and two or more coating layers covering all or part of the surface of the substrate, in which at least one of metal ions and metals migrates from the lower coating layer to the upper coating layer.
  • the coating member of the fourth invention is the third invention in which at least one of the metal ions and metal migrates from the undercoat layer, which is closer to the substrate, of the two or more coating layers to the topcoat layer, which is closer to the surface of the coating member, and at least one of the metal ions and metal migrates further to the deposits attached to the surface of the coating layer, thereby improving the removability of the deposits.
  • the coating member of the fifth invention is any one of the first to fourth inventions, in which at least one of the metal ions and the metal is an alkali metal.
  • the sixth invention is a coating member according to the third or fourth invention, in which the top coat layer of the two or more coating layers contains titanium oxide.
  • the seventh invention is a coating member according to the fifth invention, in which when the surface of the coating layer to which oil is attached is heated, the amount of alkali metal in the oil increases at the interface between the oil and the coating layer, and moisture is introduced to improve the removability of the oil.
  • the eighth invention is a coating member according to any one of the first to seventh inventions, in which the substrate contains Li ions.
  • the ninth invention is a coating member according to any one of the first to eighth inventions, in which the base material is enamel.
  • the coating member of the tenth invention is any one of the first to ninth inventions, in which the Li ions are contained in the substrate at 1 mol % or more.
  • the coating member of the eleventh invention is any of the first to tenth inventions, in which the coating layer is formed in an area that is heated to 200°C or higher.
  • the coating member of the twelfth invention is a cooking appliance or cooking utensil that uses the coating member described in any one of the first to eleventh inventions.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Food Science & Technology (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
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Abstract

L'invention concerne un élément revêtu comprenant une base et une couche de revêtement recouvrant tout ou partie des surfaces de la base, les ions métalliques contenus dans la base migrant vers la couche de revêtement. Les ions métalliques contenus dans la base migrent vers la couche de revêtement pour agir sur des substances (taches, etc.) adhérant à la surface de la couche de revêtement, rendant ainsi la surface facilement nettoyable ou convertissant les substances en substances qui sont faciles à enlever. Ainsi, les substances qui adhèrent à la surface, en particulier à des températures élevées, sont faciles à enlever.
PCT/JP2023/034166 2022-11-14 2023-09-20 Élément revêtu et cuiseur ou ustensile de cuisson comprenant celui-ci WO2024106007A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2022181634 2022-11-14
JP2022-181634 2022-11-14
JP2023-002049 2023-01-11
JP2023002049A JP2024071321A (ja) 2022-11-14 2023-01-11 コーティング部材、およびこれを用いた調理機器あるいは調理器具

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WO2024106007A1 true WO2024106007A1 (fr) 2024-05-23

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54112981A (en) * 1978-02-23 1979-09-04 Matsushita Electric Ind Co Ltd Article having self-cleaning coat
JPS54138015A (en) * 1978-04-19 1979-10-26 Matsushita Electric Ind Co Ltd Heat cooking utensile having selffcleaning coating layer
JP2002327285A (ja) * 2001-04-26 2002-11-15 Nippon Meyer Kk 調理器具
US20200270169A1 (en) * 2019-02-22 2020-08-27 Lg Electronics Inc. Enamel composition, method for preparing enamel composition, and cooking appliance
US20210171389A1 (en) * 2019-12-10 2021-06-10 Lg Electronics Inc. Composition for enamel, method for preparing a composition for enamel, and cooking appliance

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54112981A (en) * 1978-02-23 1979-09-04 Matsushita Electric Ind Co Ltd Article having self-cleaning coat
JPS54138015A (en) * 1978-04-19 1979-10-26 Matsushita Electric Ind Co Ltd Heat cooking utensile having selffcleaning coating layer
JP2002327285A (ja) * 2001-04-26 2002-11-15 Nippon Meyer Kk 調理器具
US20200270169A1 (en) * 2019-02-22 2020-08-27 Lg Electronics Inc. Enamel composition, method for preparing enamel composition, and cooking appliance
US20210171389A1 (en) * 2019-12-10 2021-06-10 Lg Electronics Inc. Composition for enamel, method for preparing a composition for enamel, and cooking appliance

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