TW202436107A - Coating components and cooking machines or cooking utensils using the same - Google Patents

Abstract

A coated member comprising a base and a coating layer covering all or some of the surfaces of the base, wherein metal ions contained in the base migrate to the coating layer. The metal ions contained in the base migrate to the coating layer to act on substances (stains, etc.) adherent to the surface of the coating layer, thereby making the surface easily cleanable or converting the substances into substances that are easy to remove. Thus, the substances which adhered to the surface especially at high temperatures are easy to remove.

Description

Coating components and cooking machines or cooking utensils using the same

The present disclosure relates to a coated component and a cooking machine or cooking appliance such as a microwave oven using the coated component.

Conventionally, it has been proposed to apply a coating of fluororesin or the like to cooking utensils to improve antifouling properties or non-stickiness (see Patent Document 1).

In addition, a heating conditioner has been proposed in which a ceramic coating film is provided by forming a fine concavo-convex surface on the surface in order to improve heat resistance (see Patent Document 2).

On the other hand, there is a known method of coating a photocatalyst on glass in order to improve antifouling properties. For example, there is a known glass which increases the amount of B2O3 in the glass to improve scratch resistance and crack resistance, while reducing the amount of alkali metal oxides in the glass and maintaining the photocatalyst activity when a titanium oxide photocatalyst is carried on the surface (see patent document 3). Prior art documents

Patent Documents Patent Document 1: Japanese Patent Publication No. 2004-278905 Patent Document 2: Japanese Patent Publication No. 2015-127632 Patent Document 3: Japanese Patent Publication No. 2019-112303

Problems that the invention aims to solve Previous fluorine coatings have limitations in heat resistance and wear resistance, and sometimes cannot be used due to temperature effects.

In addition, ceramic coatings have poor non-adhesive properties and are sometimes prone to retaining dirt.

In addition, regarding titanium oxide photocatalytic coating, alkaline metals such as Na in the glass substrate will become a barrier. If the content of alkaline metals or alkaline metal oxides in the substrate is high, the effect of titanium oxide photocatalytic coating cannot be exerted. In order to obtain the effect of titanium oxide photocatalytic coating, a barrier film against alkaline metals such as SiO2 film must be added between the substrate and the titanium oxide photocatalytic coating.

The present invention is used to solve the above-mentioned previous problems, and its purpose is to provide a coating component that can easily remove substances attached to the surface.

Means for solving the problem A coated component of one embodiment of the present invention is composed of a substrate and a coating layer, wherein the coating layer covers all or part of the surface of the substrate; and at least one of the metal ions and metals contained in the substrate moves to the coating layer.

Alternatively, another aspect of the present invention is a coated component composed of a substrate and two or more coating layers, wherein the two or more coating layers cover all or part of the surface of the substrate; and at least one of metal ions and metals moves from the lower coating layer to the upper coating layer.

Effect of the invention In one embodiment of the coated component of the present invention, metal ions contained in the substrate or the coating layer act on substances (such as dirt) attached to the coated component, thereby making it easy to remove the attached substances from the surface of the coated component.

(Knowledge and insights that form the basis of this disclosure) When the inventors of this case thought of this disclosure, microwave ovens or IH (induction heating) cooking heaters and other cooking machines that reach high temperatures have the problem that dirt such as oil, seasonings, and food are difficult to clean once they are burned and attached. For example, fluororesins that are known to have antifouling properties have low surface free energy and have water-repellent or oil-repellent properties. However, at high temperatures, the bonds of organic matter in fluororesins will break and lose this property, so antifouling properties based on other principles must be given.

The inventors of this case conducted various studies on materials that can be used even at high temperatures and found that dirt becomes easy to fall off in a certain material structure, thus achieving the state of the present disclosure.

Specifically, the cleaning performance is improved by reacting dirt components such as oil with metal components, and the dirt becomes a state or component that is easier to peel off. The metal component is a metal component that moves from the base material or base layer to the topcoat layer and passes through the topcoat layer to the vicinity of the surface.

Hereinafter, the embodiments will be described in detail with reference to the drawings. However, unnecessary detailed descriptions may be omitted. For example, detailed descriptions of well-known matters may be omitted, or repeated descriptions of substantially the same components may be omitted.

In addition, the attached drawings and the following descriptions are provided to enable a person having ordinary knowledge in the technical field to which the present invention belongs to fully understand the present disclosure, and are not intended to limit the subject matter recorded in the scope of the patent application.

Furthermore, the contents disclosed in this embodiment can be freely combined with each other to form a structure. (Implementation 1)

Below, the embodiment 1 is described using FIG. 1A and FIG. 1B. FIG. 1A is a schematic cross-sectional view of the coating component of the embodiment 1. FIG. 1B is a schematic cross-sectional view showing the state change of the coating component of the embodiment 1. [1-1. Configuration]

In FIG. 1A , the coating component 100 is composed of a substrate 110 and a coating layer 120 .

The substrate 110 includes metal ions 130 (the metal ions may be metal or metal oxide) that can move in the substrate. The substrate 110 includes, for example, sodium glass containing sodium ions. In addition, the substrate 110 may also be enamel including steel and a glass layer containing metal ions disposed on the steel.

Furthermore, the coating layer 120 includes metal oxides such as silicon dioxide, titanium oxide, magnesium oxide, zirconium oxide, tungsten oxide, or a complex thereof. Furthermore, the coating layer 120 may also further include an additive containing a metal or metal oxide or a complex thereof. Such metals are, 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 also further include an additive containing a non-metallic element. The coating layer 120 covers all or part of the surface of the substrate 110. Among the metals, alkaline metals are Li, Na, and K. In addition, the substrate 110 may also contain Li. In this case, the substrate 110 can exert its effect if it contains 1 mol % or more of Li, and it is better if it contains 10 mol % or more.

The specific formation method (coating method) of the coating layer 120 is not particularly limited, and various known methods can be used. Representative formation methods include known coating methods of preparing a coating agent containing a metal or a metal oxide and applying it, such as spray coating, spin coating, dip coating, roll coating, rod coating, gravure coating, screen printing, brush coating, brush coating, scraping coating, sponge coating, or evaporation, sputtering, plating, etc. such as CVD (Chemical Vapor Deposition) and PVD (Physical Vapor Deposition), but are not particularly specified.

When the coating layer 120 is applied to the substrate 110 , a known pre-treatment for improving adhesion may be performed, such as primer application, hydrophilization treatment, corona treatment, degreasing, etc.

Furthermore, a drying or firing step may be provided after applying the coating layer 120. [1-2. Action]

The operation of the coating member 100 constructed as described above will be described.

As shown in FIG1B , the attached object 140 such as oil, seasoning liquid, food, etc. is attached to the surface of the coating layer 120 and is heated and burnt. Alternatively, the attached object 140 is in a state of being attached to the coating member 100 by accident.

The substrate 110 contains metal ions 130. The metal ions 130 move from the substrate 110 to the coating layer 120, and move in the coating layer 120 to reach the vicinity of the surface of the coating layer 120. We believe that the movement mechanism may be grain boundary diffusion or movement of an amorphous layer, but are not limited thereto.

The metal ions 130 that have moved to the vicinity of the surface of the coating layer 120 are combined with or attached to the attached matter 140. As a result, the attached matter 140 is in a state that is easy to be peeled off from the coating member 100.

By immersing the coated member 100 with the burnt deposit 140 in water, wiping with water, or spraying steam, it becomes easy to remove the deposit 140. It is considered that the metal ions 130 are combined with the deposit 140 or the attached substance becomes a water-soluble substance, but it is not limited to this.

At this time, it can also be used for example: the indoor wall surface of microwave ovens, baking microwave ovens, ovens, etc.; the top plate or grill room of gas stoves or IH cooking heaters, etc.; the heating surface of heating plates, etc. of cooking machines; cooking utensils such as frying pans or pots; or industrial furnaces that can reach high temperatures; high temperature parts of automobiles, motorcycles, aircraft, etc., etc., and other products and parts used in high temperature environments.

If the surface of the coating layer 120 is heated, we believe that the amount of alkaline metal will increase at the interface between the oil and the coating layer 120, and the water will be mediated to enhance the oil removal performance.

For products and parts where the temperature rises, the movement of metal ions in the coated member will be accelerated, and the reaction with the attached matter on the coating layer will be accelerated, so it is desirable to heat to a high temperature, preferably to 200°C or more, more preferably to 250°C or more, and more preferably to 300°C or more.

Furthermore, if the effect can be exerted by the movement of metal ions, etc. even without heating when used at normal temperatures, the use temperature range is not specifically specified. [1-3. Effects, etc.]

As described above, the coated components, cooking machines, and cooking utensils of the present invention have excellent dirt-removing properties, especially excellent dirt-removing properties such as burnt dirt at high temperatures. (Example 1)

Sodium glass is used as the substrate 110, and a solution whose main component is titanium oxide is used as the material of the coating layer 120.

After the titanium oxide coating solution is applied to sodium glass by spraying, it is fired at 300°C for 2 hours or at 600°C for 30 minutes. The sodium glass contains about 14% of Na (sodium) in terms of Na ₂ O (sodium oxide).

Salad oil or a mixture of soy sauce, mirin, and sugar as a seasoning was dripped onto the coated member 100 prepared in the above manner, and the mixture was burned in a furnace at about 300° C. for 30 minutes. After that, the coated member 100 was taken out of the furnace, and the coated member 100 was immersed in water or wiped with a wet cloth, and it was confirmed that the burned portion of the salad oil or the burned portion of the seasoning was easily removed.

Furthermore, after the salad oil was charred and attached, TOF-SIMS (Time-of-Flight Secondary Ion Mass Spectrometry) was used to perform sputtering while confirming the distribution of Na in the depth direction of the charred salad oil (attached portion 140), coating layer 120, and sodium glass (substrate 110). As a result, it was confirmed that Na in the sodium glass moved to the coating layer 120 and further moved to the salad oil. (Implementation Form 2)

Below, implementation form 2 is described using FIG. 2A and FIG. 2B, and FIG. 3A and FIG. 3B. [2-1. Structure]

In Fig. 2A, the 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 surface coating layer 230 as an upper coating layer.

The base layer 220 covers all or part of the substrate 210. The topcoat layer 230 covers all or part of the base layer 220. The base layer 220 includes metal ions 250 (the metal ions may also be metal or metal oxide) that can move in the base layer 220.

The substrate 210 is not specifically designated, and is a metal such as SUS (stainless steel), aluminum, titanium, copper, iron, steel, galvanized steel plate, aluminum-plated steel plate, galvanized (Galvalume) steel plate (registered trademark); or glass such as sodium glass, crystallized glass, borosilicate glass, reinforced glass, quartz glass; or ceramics; or a coating or surface processing or film for improving design or heat resistance, corrosion resistance, or wear resistance is provided thereon, and is not specifically designated. Or it may also be a resin depending on the temperature range of use. Furthermore, as shown in FIG. 3A and FIG. 3B , the substrate 210 may also be enamel including a steel material 210 a and a glass layer 210 b coated on the steel material 210 a .

The base layer 220 is a layer that can supply metal ions to at least the surface coating layer 230, and is composed of a glass coating, for example. The base layer 220 may be a layer formed by coating glass paste, ceramic coating, enamel, etc., or may be a layer formed by coating sodium silicate, lithium silicate, potassium silicate, etc. Alternatively, the base layer 220 may be a layer containing at least one of metal, metal oxide, and metal ions. Alternatively, the base layer 220 may be an inorganic coating film containing at least one of metal, metal oxide, and metal ions. Alternatively, the base layer 220 may be composed of an organic coating film, which is formed by coating a polysilicone coating, a fluorine coating, an acrylic coating, a urethane coating, etc. containing at least one of metal, metal oxide, and metal ions. Alternatively, the base layer 220 may be composed of an organic/inorganic hybrid film or the like in which a metal or metal ions is added. In addition, the substrate 210 may also contain at least one of metal, metal oxide, and metal ions, similarly to the base layer 220.

When the base layer 220 is coated on the substrate 210, a known pre-treatment for improving adhesion may be performed, such as primer coating, hydrophilization treatment, corona treatment, plasma treatment, degreasing, etc.

In addition, the coating layer 230 includes at least one metal oxide such as silicon dioxide, titanium oxide, magnesium oxide, zirconium oxide, tungsten oxide, etc. In addition, it may also include additives containing metals, metal ions or metal oxides, or a complex thereof. The metal may also 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, In, etc. It may also include additives containing non-metallic elements. In addition, the base layer 220 may also include Li. At this time, the base layer 220 can be effective if it contains more than 1 mol% of Li, and it is better if it is more than 10 mol%.

Furthermore, the base layer 220 or the surface coating layer 230 may be one layer each, or may be two or more layers. Furthermore, when there are multiple layers, if the effect of the base layer 220 can be brought into play, the layers of the base layer 220 may be made of the same material or different materials. Furthermore, if the effect of the surface coating layer 230 can be brought into play, the layers of the surface coating layer 230 may be made of the same material or different materials.

The specific formation method (coating method) of the base layer 220 or the surface coating layer 230 is not particularly limited, and various known methods can be used. Representative formation methods include known coating methods of preparing a coating agent containing a metal or a metal oxide and applying it, such as spray coating, spin coating, dip coating, roll coating, rod coating, gravure coating, screen printing, brush coating, brush coating, scraping coating, sponge coating, etc., or evaporation, sputtering, plating, etc. of CVD, PVD, etc., but not specifically specified.

When the surface coating layer 230 is applied to the base layer 220 , a known prior treatment may be performed to improve adhesion, such as primer application, hydrophilization treatment, corona treatment, plasma treatment, degreasing, etc.

Furthermore, a drying or firing step may be provided after coating at least one of the base layer 220 and the surface coating layer 230. [2-2. Action]

With respect to the coating component 200 constructed in the above manner, its state, changes and actions are described.

As shown in FIG2B , the coating member 200 includes a coating layer 230 formed on its surface. The attached object 260, such as oil, seasoning liquid, food, etc., is heated and burnt while being attached to the coating layer 230. Alternatively, the attached object 260 is in a state of being attached to the coating member 200 without being intentionally burnt.

The metal ions 250 are contained in the base layer 220. The metal ions 250 move from the base layer 220 to the surface coating layer 230, and move in the surface coating layer 230 to reach the vicinity of the surface of the surface coating layer 230. The movement mechanism is not clear, and we think it may be grain boundary diffusion or movement of the amorphous layer, but it is not specific to this. In addition, when the substrate 210 also contains at least one of metal, metal oxide, and metal ions like the base layer 220, the metal ions contained in the substrate 210 will move from the substrate 210 to the base layer 220, and the metal ions 250 contained in the base layer 220 will move from the base layer 220 to the topcoat 230, and move in the topcoat 230 and reach near the surface of the topcoat 230.

The metal ions 250 that have moved to the vicinity of the surface of the coating layer 230 are combined with or attached to the attachments 260. As a result, the attachments 260 are in a state that is easy to be peeled off from the coating member 200.

By immersing the coated member 200 with the burnt-on deposit 260 in water, wiping with water, or spraying steam, it becomes easy to remove the deposit 260. This may be that the metal ions 250 are combined with the deposit 260 or the attached substance becomes a water-soluble substance, but it is not limited thereto.

In this case, it can be used, for example, on the indoor wall of a microwave oven, a baking microwave oven, an oven, etc., which are cooking machines; the top plate or grill of a gas stove or IH cooking heater, etc.; the heating surface of a heating plate. It can also be used on cooking utensils such as frying pans or pots. Alternatively, it can also be used on industrial furnaces that reach high temperatures; high-temperature parts of cars, motorcycles, aircraft, etc., and other products and parts used in high-temperature environments.

If the surface of the oil-attached top coating layer 230 is heated, we believe that the amount of alkaline metal will increase at the interface between the oil and the aforementioned coating layer, and the water will be mediated to enhance the oil removal performance.

For products and parts where the temperature rises, it is desirable to heat to a high temperature, preferably to 200°C or more, more preferably to 250°C or more, and even more preferably to 300°C or more, because the movement of metal ions in the coating film is accelerated and the reaction with the attached matter on the coating film is accelerated.

It is desirable that the metal ions 250 are those that diffuse easily due to heat. For example, Li, which has an ion radius smaller than that of Na or K of the same group, diffuses more easily in the coating member 200 than Na or K of the same group with an ion radius larger than that of Li, so more ions will move to the surface coating layer 230. Therefore, when Li is used as the metal ion, the antifouling effect becomes higher than when other ions are used.

Furthermore, the metal ions 250 exhibit an antifouling effect by combining with the attachment 260. Therefore, whenever the attachment is attached and removed, the metal ions that contribute to the antifouling effect will decrease. If the attachment and removal are repeated, the reduction will gradually reduce the antifouling effect. However, when Li is used for the metal ions 250, since Li is easily diffused, even if the metal ions 250 are reduced due to the attachment and removal of the attachment 260 to the coating member 200, the metal ions 250 are still easily supplied from the base layer 220. Therefore, when Li is used for the metal ions 250, the antifouling effect or its effect life can be extended.

The material of the base layer 220 is preferably smooth and allows the metal ions 250 to move easily. For example, glass has the following characteristics: not only can a smooth base layer be formed by sintering after being paste-formed and coated, but also metal ions can move easily due to incomplete bonding of the constituent elements. Therefore, by using a raw material of the desired metal ions for the glass material, a smooth base layer 220 containing the metal ions 250 can be formed.

When a glass material is used for the base layer 220, as shown in FIG. 3A and FIG. 3B, it is desirable that the base layer 210 is enamel including a steel material 210a and a glass layer 210b covering the steel material 210a. When the thermal expansion coefficients of the base layer 220 and the base layer 210 are greatly different, the base layer 220 is easily peeled off or cracked from the base layer 210. However, when enamel is used for the base layer 210, since the base layer 220 of the glass material including a large amount of metal ions 250 is formed on the glass layer 210b of the enamel, and the base layer 210 and the base layer 220 are both glass materials and thus have similar thermal expansion coefficients, a base layer 220 with high adhesion and smoothness can be formed.

Furthermore, if the attached material does not burn or adhere even after heating and can still exert its effect through metal ion migration under normal use, the use temperature range is not particularly specified. [2-3. Effects, etc.]

As described above, the coated components, cooking machines, and cooking utensils of the present invention have excellent dirt-removing properties, especially excellent dirt-removing properties such as burnt dirt at high temperatures. (Example 2)

Crystallized glass is used as the material of the substrate 210, sodium silicate solution is used as the material of the base layer 220, and a solution whose main component is titanium oxide is used as the material of the surface coating layer 230.

A coating solution of about 32% sodium silicate solution diluted with water is applied to the crystallized glass by immersion and dried at room temperature. Afterwards, a coating solution of about 1% titanium oxide is applied by spraying and then dried at room temperature.

Salad oil or a mixture of soy sauce, mirin, and sugar as a seasoning was dripped onto the coated member 200 prepared in the above manner, and the mixture was burned in a furnace at about 300° C. for 30 minutes. After that, the coated member 200 was taken out of the furnace, and the coated member 200 was wiped with a wet cloth, and it was confirmed that the burnt salad oil or the burnt seasoning was easily removed.

Similarly, it was confirmed that even if lithium silicate or potassium silicate solution was used as the material of the base layer 220, it was still easy to remove dirt. (Example 3)

An aluminum-plated steel plate is used as the substrate 210 (SUS430 (stainless steel containing more than 16% chromium) or an aluminum-plated steel plate coated with a silicone resin can also be used as the substrate 210), and a layer coated with a sodium silicate solution is used as the material of the base layer 220, and a titanium oxide solution whose main component is titanium oxide is used as the material of the surface coating layer 230.

A 32% sodium silicate solution was applied to the aluminum-plated steel plate by spraying and dried at room temperature. After that, a titanium oxide solution was applied by spraying and then calcined at 300°C for 1 hour.

Salad oil or a mixture of soy sauce, mirin, and sugar as a seasoning was dripped onto the coated member 200 prepared in the above manner, and the mixture was burnt in a furnace at about 250°C for 30 minutes. Afterwards, the coated member 200 was taken out of the furnace, and after wiping the coated member 200 with a wet cloth, it was confirmed that the burnt salad oil or the burnt seasoning was easily removed. (Example 4)

An alumina plate is used as the substrate 210, a low-melting-point glass paste containing Na2O is used as the material of the base layer 220, and a solution in which a metal element different from titanium oxide (non-titanium metal element) is added to titanium oxide is used as the material of the surface coating layer 230.

The glass paste was printed on the alumina plate by screen printing and fired at 600°C for 10 minutes. Then, a solution containing a metal element different from titanium oxide (non-titanium metal element) was applied by immersion and fired at 300°C for 1 hour.

Salad oil or a mixture of soy sauce, mirin, and sugar as a seasoning was dripped onto the coating member 200 prepared in the above manner, and the mixture was burnt in a furnace at about 300°C for 30 minutes. Afterwards, the coating member 200 was immersed in water, and it was confirmed that the burnt oil or seasoning was easily removed. In addition, it was also confirmed that mayonnaise or curry sauce was easily removed. (Example 5)

An alumina plate is used as the substrate 210, and the material for the base layer 220 is a mixture of sodium glass powder and the same glass paste as that used in Example 4 so that the amount of Na2O in the base layer 220 reaches about 15%, and a solution in which a metal element different from titanium oxide (non-titanium metal element) is added to titanium oxide is used as the material for the surface coating layer 230.

Glass paste with sodium glass powder was printed on an alumina plate by screen printing and fired at 600°C for 10 minutes. Then, a solution containing a metal element different from titanium oxide (non-titanium metal element) was sprayed on the titanium oxide and fired at 300°C for 1 hour.

Salad oil or a mixture of soy sauce, mirin, and sugar as a seasoning was dripped onto the coated member 200 prepared in the above manner, and the mixture was burnt in a furnace at about 300° C. for 30 minutes. Afterwards, the coated member 200 was taken out of the furnace, and after wiping the coated member 200 with a wet cloth, it was confirmed that the burnt salad oil or the burnt seasoning was easier to remove than in Example 4.

Furthermore, it was confirmed that even if anhydrous sodium silicate powder was mixed in place of sodium glass powder to achieve a 25% Na2O content in the base layer 220 and used as the base layer 220, the dirt was still easily removed. (Example 6)

Sodium glass is used as the substrate 210, and the material of the base layer 220 is a glass paste made by mixing glass powder containing about 10 mol% of Li with a medium solution of cellulose mixed in terpineol, and the material of the surface coating layer 230 is a solution of titanium oxide with a metal element (non-titanium metal element) added to titanium oxide. The base layer 220 is printed with the aforementioned glass paste by screen printing and fired at 600°C for 10 minutes. After that, the titanium oxide solution is sprayed and fired at 500°C for 1 hour. In addition, if Li contains more than 1 mol%, it can be effective, and if it is more than 10 mol%, it is better.

Salad oil or a mixture of soy sauce, mirin, and sugar as a seasoning was dripped onto the coating member 200 prepared in the above manner, and the mixture was charred in a furnace at about 300°C for 30 minutes. Afterwards, the coating member 200 was taken out of the furnace, and after wiping the coating member 200 with a wet cloth, it was confirmed that the charred salad oil or charred seasoning was easier to remove than in Example 5. In addition, the same experiment of charring the salad oil and wiping it was repeated to confirm the effect life. At this time, it was confirmed that the effect life was longer than that of Example 5. (Example 7)

An enamel having a glass layer formed on a steel material is used as a substrate 210, and a base layer 220 and a surface coating layer 230 are formed on the substrate using the same materials as those of Example 6.

Salad oil or a mixture of soy sauce, mirin, and sugar as a seasoning was dripped onto the coating member 200 prepared in the above manner, and the mixture was charred in a furnace at about 300°C for 30 minutes. Afterwards, the coating member 200 was taken out of the furnace, and after wiping the coating member 200 with a wet cloth, the easy removal of the charred salad oil or charred seasoning was confirmed to be the same as in Example 6. In addition, the same experiment of charring the salad oil and wiping it was repeated to confirm the effect life. At this time, the effect life was confirmed to be the same as in Example 6. (Comparative Example 1)

Crystallized glass was used as a substrate, and a solution identical to the titanium oxide coating solution used in Example 1 or Example 2 was sprayed as a surface coating, and then sintered at 300° C. for 2 hours.

The coated member prepared in the above manner was dripped with salad oil, and then burned in a furnace at about 300°C for 30 minutes. Afterwards, it was taken out, and although it was soaked in water or wiped with a wet cloth, the burnt salad oil could not be removed.

In addition, after the salad oil was charred and attached, TOF-SIMS (time-of-flight secondary ion mass spectrometry) was used to perform sputtering while confirming the distribution of Na in the depth direction of the charred salad oil, coating layer, and crystallized glass. As a result, a trace amount of Na was confirmed in the crystallized glass, but Na could not be confirmed in the coating layer or the salad oil. (Comparative Example 2)

SUS430 was used as the substrate, and a solution prepared by adding a metal element different from the titanium oxide (non-titanium metal element) to the titanium oxide as in Example 4 was used as the surface coating.

A solution of titanium oxide with other metal elements added is sprayed onto SUS430 and fired at 300°C for 1 hour. The amount of Na in SUS430 is almost zero.

Oleic acid or a mixture of soy sauce, mirin, and sugar as a seasoning is dripped onto the coated member 200 produced in the above manner, and the mixture is charred in a furnace at about 300°C for 30 minutes. Afterwards, the coated member is immersed in water, but the charred oil or seasoning cannot be removed. (Implementation Form 3)

The following describes implementation form 3. [3-1. Structure]

A coating member is provided on each inner surface of a heating processor such as a microwave oven. The coating member is a coating member 100 described in any one of Examples 1 to 5, wherein salad oil and seasoning liquid are burnt and attached to the coating member. [3-2. Action]

Activate the steam function of the microwave oven to fill the microwave oven chamber with steam and keep this state for about 10 minutes.

After that, the salad oil and seasoning liquid on the coating member provided on the inner side of the microwave oven were wiped with a cloth, and it was confirmed that the burnt materials were easily removed.

In addition, if the superheated water vapor is above 200℃, the steam function will have a considerable effect. If the superheated water vapor is above 250℃, it is even better. Because the surface of the coated component is formed in the area heated at above 200℃, the above effect can be exerted. [3-3. Effects, etc.]

As described above, the conditioning machine and conditioning utensil using the coating member of the present invention have excellent dirt stripping properties, especially excellent stripping properties of burnt dirt at high temperatures.

As described above, the coated member of the first invention is composed of a substrate and a coating layer, wherein the coating layer covers all or part of the surface of the substrate; and at least one of metal ions and metals contained in the substrate moves to the coating layer.

The coated member of the second invention is the one according to the first invention, wherein at least one of metal ions and metals contained in the coated member moves to the attached matter attached to the surface of the coating layer, thereby improving the removability of the attached matter.

The coated component of the third invention is composed of a substrate and two or more coating layers, wherein the two or more coating layers cover all or part of the surface of the substrate, and at least one of metal ions and metals moves from the lower coating layer to the upper coating layer.

The coated component of the fourth invention is a component according to the third invention, wherein in the two or more coating layers, at least one of the metal ions and the metal moves from a base layer closer to the substrate to a surface coating layer closer to the surface of the coated component, and at least one of the metal ions and the metal further moves to an attachment attached to the surface of the coating layer, thereby improving the removability of the attachment.

The coated component of the fifth invention is any one of the first to fourth inventions, wherein at least one of the metal ions and the metal is an alkaline metal.

The coated member of the sixth invention is the coated member of the third or fourth invention, wherein the surface coating layer of the two or more coating layers contains titanium oxide.

The coated component of the seventh invention is the coating component of the fifth invention, wherein when the surface of the coating layer before the oil is attached is heated, the amount of the alkaline metal increases before the oil and at the interface side between the oil and the coating layer, and the removal of the oil can be improved by intermediating water.

The coated component of the eighth invention is characterized in that in any one of the first to seventh inventions, the substrate contains Li ions.

The coated component of the ninth invention is the coated component according to any one of the first to eighth inventions, wherein the substrate is made of enamel.

The coated member of the tenth invention is any one of the first to ninth inventions, wherein the Li ions are contained in the substrate at 1 mol % or more.

The coated member of the 11th invention is any one of the 1st to 10th inventions, wherein the coating layer is formed in a region heated at 200° C. or higher.

The coating component of the twelfth invention is a processing machine or a processing utensil using the coating component described in any one of the first to eleventh inventions.

Industrial Applicability By providing a coating component that can easily remove substances attached to the surface, it can be effectively used in: conditioning machines or conditioning equipment, industrial furnaces that can reach high temperatures, high-temperature parts of automobiles or motorcycles, aircraft, etc., and other products and parts used in high-temperature environments.

100,200: Coated component 110,210: Substrate 120,240: Coating layer 130,250: Metal ions 140,260: Adherents 210a: Steel 210b: Glass layer 220: Base layer 230: Surface coating layer

FIG. 1A is a schematic cross-sectional view of the coating component of the present embodiment 1. FIG. 1B is a schematic cross-sectional view showing the state change of the coating component of the present embodiment 1. FIG. 2A is a schematic cross-sectional view of the coating component of the present embodiment 2. FIG. 2B is a schematic cross-sectional view showing the state change of the coating component of the present embodiment 2. FIG. 3A is another schematic cross-sectional view of the coating component of the present embodiment 2. FIG. 3B is another schematic cross-sectional view showing the state change of the coating component of the present embodiment 2.

100: Paint components

110: Base material

120: coating layer

130: Metal ions

Claims (16)

A coated component is composed of a substrate and a coating layer, wherein the coating layer covers the entire or a part of the surface of the substrate; and at least any one of metal ions and metals contained in the substrate moves to the coating layer. As in claim 1, the coated component wherein at least any one of metal ions and metals contained in the coated component is moved to the attached matter attached to the surface of the coating layer, thereby improving the removability of the attached matter. The coated component of claim 1 or 2, wherein the substrate contains Li ions. A coated component as claimed in claim 3, wherein the substrate is made of enamel. The coated component of claim 3, wherein the Li ions are contained in the substrate at a content of 1 mol % or more. The coated component of claim 1 or 2, wherein the coating layer is formed in a region heated at a temperature above 200°C. A coated component is composed of a substrate and a coating layer, wherein the coating layer covers all or part of the surface of the substrate; the coating layer includes a surface coating layer and a base layer between the surface coating layer and the substrate; and at least one of metal ions and metals moves from the base layer to the surface coating layer. As in claim 7, the coated component wherein at least one of the metal ions and the metal is further moved to the attachments attached to the surface of the coating layer, thereby improving the removability of the attachments. A coated component as claimed in claim 1 or 7, wherein at least any one of the aforementioned metal ions and metals is an alkaline metal. A coated component as claimed in claim 7 or 8, wherein the surface coating layer comprises titanium oxide. In the coated component of claim 9, if the surface of the coating layer with oil attached thereto is heated, the amount of the alkaline metal at the interface between the oil and the coating layer will increase, and the removal of the oil can be enhanced by intermediating water. The coated component of claim 7 or 8, wherein the base layer contains Li ions. A coated component as claimed in claim 12, wherein the substrate is made of enamel. The coated component of claim 12, wherein the Li ions are contained in the base layer at a content of 1 mol % or more. A coated component as claimed in claim 7 or 8, wherein the coating layer is formed in a region heated at a temperature above 200°C. A cooking machine or cooking utensil uses the coating component of claim 1 or 7.

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