Composite material for cooking utensils, method for manufacturing the same, and cooking utensils

Abstract

Provided are a composite material for cooking utensils, a method for manufacturing the same, and a cooking utensil. The composite material includes a hard particle material, a silicon-containing coating material, and a metal coating material. The silicon-containing coating material is coated outside the hard particle material, and the metal coating material is coated outside the silicon-containing coating material. The main component of the silicon-containing coating material is at least one of silane, siloxane, silane polymer, and siloxane polymer. The composite material does not generate toxic gases after pyrolysis. A protective layer made of the composite material is used in a cooking utensil. The cooking utensil has excellent wear resistance, corrosion resistance, and convenience for continuous cleaning, and is safe and non-toxic.

Description

Technical Field

[0001] The present invention relates to the technical field of cooking appliances, and specifically to a composite material for cooking utensils, a manufacturing method thereof, and a cooking utensil.

Background Art

[0002] With the continuous improvement of living standards, people are raising their requirements for the performance and quality of cooking utensils. High-quality cooking utensils are required to have uniform heating, convenient cleaning, excellent corrosion resistance and wear resistance. The annual demand for high-performance food cooking utensils nationwide is more than 100 million units. Currently, in order to facilitate the cleaning of food cooking utensils during cooking and resist corrosion, generally, a functional coating is provided on the inner surface of the utensil that carries food, and the related functional effects are realized by utilizing the surface effect of the functional coating. However, effects such as convenient cleaning and corrosion resistance are lost due to the damage of the coating.

[0003] Currently, the most commonly used functional coating is an organic resin-based coating. This coating has low surface hardness and strength, cannot withstand the wear of a metal spatula, has poor durability under high-temperature and high-humidity conditions, and the surface is easily damaged or broken. As a result, performance such as the convenience of cleaning is lost. In addition, organic resin coating materials such as fluororesin decompose at high temperatures and volatilize toxic and harmful gases, threatening human health.

[0004] Therefore, in order to overcome the defects of existing functional coating cooking utensils and meet the needs of consumers for cooking utensils, it is necessary to provide a cooking utensil that includes a non-toxic, healthy, and safe material with wear resistance, corrosion resistance, and continuous cleaning convenience.

Summary of the Invention

Problems to be Solved by the Invention

[0005] The present invention aims to solve to some extent one of the technical problems in the related art. Therefore, an object of the present invention is to provide a composite material for cooking utensils, a manufacturing method thereof, and a cooking utensil, wherein the cooking utensil has excellent wear resistance, corrosion resistance, and convenience for continuous cleaning, and is safe and non-toxic.

Means for Solving the Problems

[0006] According to one aspect of the present invention, a composite material for cooking utensils is provided. The composite material includes a hard particle material, a silicon-containing coating material, and a metal coating material. The silicon-containing coating material is coated outside the hard particle material, and the metal coating material is coated outside the silicon-containing coating material. The main component of the silicon-containing coating material is at least one of silane, siloxane, silane polymer, and siloxane polymer. The composite material for cooking utensils described in the present invention has a multi-layer sandwich structure of hard substrate - soft substrate - hard substrate, with the hard particle material as the internal hard core, having high hardness and wear resistance. Using the composite material to manufacture a protective layer and apply it to cooking utensils, the hard particle material forms a particle support skeleton, giving the protective layer excellent hardness, structural strength, and wear resistance. The silicon-containing coating material is a low surface energy material, coated on the surface of the hard particle material to form a functional layer of the soft substrate, giving the protective layer excellent cleaning convenience. And the main component of the silicon-containing coating material is silane, siloxane, silane polymer, siloxane polymer, which does not generate toxic and dangerous gases after thermal decomposition. At the same time, the decomposition product is also a hard low surface energy structure, which can permanently maintain the wear resistance and cleaning convenience of the protective layer. The metal coating material is provided outside the silicon-containing coating material as an outer hard coating layer. On the one hand, it forms an outer protective layer to prevent the silicon-containing coating material from being damaged during processes such as material transportation, loading, storage, etc., or being directly thermally decomposed in thermal processes such as spraying or hot cladding, which may affect the performance of the product. On the other hand, when manufacturing the protective layer by thermal processes such as spraying or hot cladding, the metal coating material is heated and melted, firmly bonded to the surface of the cooking utensil, and at the same time forms a bonding phase in the protective layer, integrally connecting each hard particle coated with the silicon-containing coating material, ensuring a strong bond between the protective layer and the cooking utensil, and improving the overall strength and durability of the protective layer.

[0007] Preferably, the siloxane polymer is selected from at least one of methyl silicone oil and dimethicone, and the silane is selected from at least one of tetraethoxysilane and methyltriethoxysilane. The above siloxane polymer material and silane material have low surface energy and good hydrophobicity, and can provide excellent cleaning convenience for cooking utensils. At the same time, the above materials only contain elements of Si, H, C, and O, do not generate toxic gases after thermal decomposition, can be used safely, and can form a substance structure with low surface energy and high hardness such as Si-C, Si-O, and C after decomposition, ensuring the continuous strength, wear resistance, and cleaning convenience of the protective layer.

[0008] Preferably, in the silicon-containing coating material, the mass ratio of the main component is 20% - 80%. By using the silicon-containing coating material with the above composition ratio, it can ensure that sufficient amounts of low surface energy materials such as silane, siloxane, silane polymer, and siloxane polymer are coated and adhered to the surface of the hard particle material. The cooking utensils manufactured using the composite material have continuous wear resistance, corrosion resistance, and cleaning convenience.

[0009] Preferably, the mass ratio of the hard particle material to the silicon-containing coating material is 1:1 to 1:3. The ratio of the hard particle material to the silicon-containing coating material affects the performance of the protective layer manufactured from the composite material. If the proportion of the silicon-containing coating material is too small, the hard particle material cannot be completely coated, which affects the wear resistance, corrosion resistance, and cleaning convenience of the final protective layer. If the proportion of the silicon-containing coating material is too large, too much coating material cannot sufficiently contact the surface of the hard particle material and is likely to fall off in subsequent processes. Too much silicon-containing coating material also has an adverse effect on subsequent processes such as drying and granulation of the composite material. Moreover, since the proportion of the hard particle material is too small, the strength and wear resistance of the manufactured protective layer are insufficient. In the present application, the mass ratio of the hard particle material to the silicon-containing coating material is selected to be 1:1 to 1:3. By selecting this ratio, it can be ensured that the silicon-containing coating material completely and uniformly coats the hard particle material, and there is sufficient hard particle material to provide the hardness and strength of the protective layer. Therefore, the protective layer manufactured using the composite material has excellent wear resistance, hardness, strength, and cleaning convenience.

[0010] Preferably, the hard particle material is selected from at least one of a metal material, a ceramic material, carbon particles, and metal silicon. Since the above particle materials have high hardness and excellent wear resistance and corrosion resistance, the protective layer manufactured from the composite material has excellent hardness, wear resistance, and corrosion resistance and can function permanently.

[0011] Preferably, the metal material is selected from at least one of titanium, nickel, chromium, silver, copper, iron, molybdenum, titanium alloys, aluminum alloys, stainless steel, Ni-Cr alloys, Ni-Cu alloys, Co-Cr-W alloys, Ni-Cr-Al-Y alloys, Co-Cr-Al-Y alloys, and Fe-Cr-Al-Y alloys; the ceramic material is selected from at least one of silicon carbide, silicon oxide, hexagonal boron nitride, yttrium oxide, zirconium oxide, and titanium oxide; and the carbon particles are selected from at least one of graphite particles, graphene particles, and carbon fiber particles. Since the above hard particle material is excellent in hardness, wear resistance, and corrosion resistance and is non-toxic, the protective layer made of the composite material has excellent hardness, wear resistance, and corrosion resistance, can function permanently, and is safe and non-toxic.

[0012] Preferably, the particle size of the hard particle material is 300 mesh to 600 mesh. By using the hard particle material within the above particle size range, the mixing of the silicon-containing coating material and the hard particle material can be made uniform, the silicon-containing coating material can be uniformly adhered to the surface of the hard particles, and it contributes to subsequent processes such as granulation. At the same time, by using the hard particle material within the above particle size range, the uniform dispersion of the hard particle material in the protective layer is ensured, the porosity of the protective layer is reduced, and the protective layer is provided with excellent wear resistance and convenience for continuous cleaning.

[0013] Preferably, the composite material is a powder core wire or a composite powder material. The powder core wire has a hard particle material coated with the silicon-containing coating material as the powder core and the metal coating material as the outer skin. The composite powder material has a core-shell structure, with the hard particle material as the core and is sequentially coated with the silicon-containing coating material and the metal coating material. In the present application, the composite material can be manufactured in the form of a powder core wire or a composite powder material to suit various processing processes. The powder core wire has a short manufacturing cycle, low production cost, high applicability. The outer layer of the composite powder material is uniformly coated with metal, and the performance of the particles is uniform.

[0014] According to another aspect of the present invention, a method for manufacturing a composite material for a cooking appliance is provided. The method includes the steps of uniformly mixing a hard particle material and a silicon-containing coating material so that the silicon-containing coating material uniformly coats the hard particle material; manufacturing composite particles having surfaces coated with the silicon-containing coating material by spray granulation or drying-crushing of the mixture of the hard particle material and the silicon-containing coating material; and secondarily coating the composite particles having surfaces coated with the silicon-containing coating material with a metal coating material to obtain the composite material for the cooking appliance. When the composite material is manufactured by this method, it can be ensured that the silicon-containing coating material completely and uniformly coats the surface of the hard particles, and the metal coating material completely coats the composite particles after primary coating, improving the performance of the composite material.

[0015] Preferably, the method of the secondary coating is any one of a powder / tube coating method, a powder / skin coating method, vacuum plating, and chemical plating. The powder / tube coating method and the powder / skin coating method are selective secondary coating processes when manufacturing a powder core wire. First, a metal coating material is manufactured as a metal tube / metal strip, and then the composite particles primary-coated with the silicon-containing coating material are filled into the metal tube / metal strip as a coating skin, and further processes such as continuous rolling, drawing, and diameter reduction are performed to obtain a powder core wire of a predetermined specification. This method has a short manufacturing cycle, low production cost, and high applicability. Vacuum plating and chemical plating are selective secondary coating processes when manufacturing a composite powder material, and the metal coating material is plated on the surface of the composite particles primary-coated with the silicon-containing coating material by vacuum plating and chemical plating, with uniform coating and uniform particle performance.

[0016] According to still another aspect of the present invention, a cooking appliance is provided. The cooking appliance includes a base body and a protective layer. The base body includes a surface adjacent to food. The protective layer is provided at least on the surface of the base body adjacent to food, and the protective layer is manufactured from the composite material described in the present application. By manufacturing the composite material described in the present application as a protective layer and using it on the surface of the base body of the cooking appliance adjacent to food, the cooking appliance is provided with excellent wear resistance, corrosion resistance, and convenience for continuous cleaning.

[0017] Preferably, the protective layer is formed by applying the composite material onto the surface adjacent to the base food by means of spraying or hot cladding. The protective layer is manufactured by spraying or hot cladding. The metal coating material of the outer layer of the composite material is heated and melted during the manufacture of the protective layer, firmly bonded to the surface of the cooking utensil, and at the same time, the hard particles coated with the silicon-containing coating material are also firmly bonded integrally. The manufactured protective layer has excellent strength, wear resistance, convenience for continuous cleaning, and is not easy to fall off.

[0018] Preferably, the protective layer is further subjected to infiltration and modification treatment using a low surface energy material. When manufacturing the protective layer by a thermal process such as spraying or hot cladding, due to the deviation of actual operation and the local thermal decomposition of the silicon-containing coating material, certain holes and pores are generated on the surface of the protective layer. By further infiltrating and modifying the protective layer with a low surface energy material after manufacturing the protective layer by a thermal process, the surface freedom degree of the protective layer can be further reduced, and the cleaning convenience of the cooking utensil can be improved. As the low surface energy material, fatty acids, silicone oil, silicon titanate, etc. can be selected.

[0019] Additional aspects and advantages of the present invention are described in part in the following description, become apparent in part from the following description, or can be learned by the practice of the present invention.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Figure 3

Modes for Carrying Out the Invention

[0021] Hereinafter, embodiments of the present invention will be described in detail. Examples of the embodiments are shown in the accompanying drawings, and throughout the drawings, the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are used for interpreting the present invention and should not be understood as limiting the present invention.

[0022] The present invention provides a composite material for cooking utensils, which composite material includes a hard particle material, a silicon-containing coating material, and a metal coating material. The silicon-containing coating material is coated outside the hard particle material, and the metal coating material is coated outside the silicon-containing coating material. The main components of the silicon-containing coating material are at least one of silane, siloxane, silane polymer, and siloxane polymer. Different from the currently commonly used organic resin-based functional coating materials, the composite material for cooking utensils has a sandwich structure of hard substrate-soft substrate-hard substrate, uses the hard particle material as the internal hard core, has high hardness and wear resistance. In the protective layer manufactured with the composite material, the hard particle material is uniformly distributed in the protective layer to form a particle support skeleton, greatly improving the hardness, structural strength, and wear resistance of the protective layer. The silicon-containing coating material is a low surface energy material, coated on the surface of the hard particle material to form a functional layer of the soft substrate, used in the manufacture of cooking utensils, giving the cooking utensils excellent cleaning convenience, and the main components of the silicon-containing coating material are silane, siloxane, silane polymer, and siloxane polymer, which do not generate toxic and dangerous gases after thermal decomposition, are non-toxic and safe in use. At the same time, the above main components form a substance structure with low surface energy and high hardness such as Si-C, Si-O, C, etc. after thermal decomposition, ensuring that the protective layer after decomposition still has good cleaning convenience and wear resistance. The metal coating material is provided outside the silicon-containing coating material as an outer hard coating layer. On the one hand, it forms an outer protective layer to prevent the silicon-containing coating material from being damaged during processes such as material transportation, loading, storage, etc., or being directly thermally decomposed in thermal processes such as spraying or hot cladding, which may affect the performance of the product. On the other hand, when manufacturing the protective layer by thermal processes such as spraying or hot cladding, the metal coating material is heated and melted, firmly bonded to the surface of the cooking utensil, and at the same time forms a bonding phase in the protective layer, integrally connecting each hard particle coating the silicon-containing coating material, ensuring a strong bond between the protective layer and the cooking utensil, and improving the overall strength and durability of the protective layer.

[0023] Specifically, the siloxane polymer is selected from at least one of methyl silicone oil and dimethicone, and the silane is selected from at least one of tetraethoxysilane and methyltriethoxysilane. The above siloxane polymer material and silane material have low surface energy and good hydrophobicity, and can provide excellent cleaning convenience for the protective layer. At the same time, the above materials only contain elements of Si, H, C, and O, do not generate toxic gases after thermal decomposition, can be used safely, and can form a substance structure with low surface energy and high hardness such as Si-C, Si-O, and C after decomposition, ensuring the continuous strength, wear resistance, and cleaning convenience of the protective layer.

[0024] The mass ratio of the main components of the silicon-containing coating material is 20% - 80%. Silane, siloxane, silane polymer, and siloxane polymer, as the main components or main functional components of the silicon-containing coating material, their contents affect the performance of the final protective layer such as wear resistance, strength, and cleaning convenience. If the proportion of the main components is too small, the functional components in the manufactured protective layer will decrease, and the performance such as the cleaning convenience of the protective layer will deteriorate. By using the silicon-containing coating material with the above composition ratio, it can ensure that a sufficient amount of low surface energy materials such as silane, siloxane, silane polymer, and siloxane polymer are wrapped and adhered to the surface of the hard particle material, ensuring that the protective layer made of the composite material has excellent wear resistance, strength, and cleaning convenience. In addition to the main components, the silicon-containing coating material also contains auxiliary components such as ordinary solvents, auxiliaries (dispersion aids, flow aids, etc.), and fillers to further improve the performance of the composite material. The main components of the silicon-containing coating material are the components that play a major functional role in improving the performance such as cleaning convenience, wear resistance, and corrosion resistance. The auxiliary components such as fillers, auxiliaries, and solvents that are selectively included only play an auxiliary functional role and are not the main functional components even if the addition amount is large.

[0025] Specifically, the mass ratio of the main component of the silicon-containing coating material is 20% to 80%. For example, the mass ratio of the main component of the silicon-containing coating material is 20% to 70%, 20% to 60%, 20% to 50%, 20% to 40%, 20% to 30%, 30% to 70%, 30% to 60%, 30% to 50%, 30% to 40%, 30% to 50%, 40% to 50%, etc. For example, the mass ratio of the main component of the silicon-containing coating material is 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, etc.

[0026] The mass ratio of the hard particle material to the silicon-containing coating material is 1:1 to 1:3. The ratio of the hard particle material to the silicon-containing coating material affects the performance of the protective layer. If the proportion of the silicon-containing coating material is too small, the hard particle material cannot be completely coated, which affects the performance of the final protective layer. If the proportion of the silicon-containing coating material is too large, too much coating material cannot sufficiently contact the surface of the hard particle material, making it easy to fall off in subsequent processes. Too much silicon-containing coating material also has an adverse effect on subsequent processes such as drying and granulation of the composite material, and since the proportion of the hard particle material is too small, the strength and wear resistance of the manufactured protective layer are insufficient. By using the above ratio, it can be ensured that the silicon-containing coating material completely and uniformly coats the hard particle material, and there is sufficient hard particle material to provide hardness and skeleton strength in the protective layer, so that the protective layer manufactured using the composite material has excellent wear resistance, hardness, strength, and cleaning convenience.

[0027] Specifically, the mass ratio of the hard particle material to the silicon-containing coating material is 1:1 to 1:3. For example, the mass ratio of the hard particle material to the silicon-containing coating material is 1:1 to 1:2, 1:2 to 1:3, etc. For example, the mass ratio of the hard particle material to the silicon-containing coating material is 1:1, 1:1.5, 1:2, 1:2.5, 1:3, etc.

[0028] The hard particle material is selected from at least one of a metal material, a ceramic material, carbon particles, and metallic silicon. The hardness and strength of the hard particle material have an important influence on the hardness, wear resistance, and strength of the manufactured protective layer. When using a hard particle material with high hardness and high strength, the protective layer can be given excellent wear resistance and strength. Since the above hard particle material has high hardness, excellent wear resistance, and corrosion resistance, the manufactured protective layer has excellent hardness, wear resistance, and corrosion resistance and can function permanently.

[0029] Specifically, the metal material is selected from at least one of titanium, nickel, chromium, silver, copper, iron, molybdenum, titanium alloys, aluminum alloys, stainless steel, Ni-Cr alloys, Ni-Cu alloys, Co-Cr-W alloys, Ni-Cr-Al-Y alloys, Co-Cr-Al-Y alloys, and Fe-Cr-Al-Y alloys; the ceramic material is selected from at least one of silicon carbide, silicon oxide, hexagonal boron nitride, yttrium oxide, zirconium oxide, and titanium oxide; and the carbon particles are selected from at least one of graphite particles, graphene particles, and carbon fiber particles. Since the above hard particle material is excellent in hardness, wear resistance, and corrosion resistance and is non-toxic, the manufactured protective layer has excellent hardness, wear resistance, and corrosion resistance, can function permanently, and is safe and non-toxic.

[0030] The particle size of the hard particle material is 300 mesh to 600 mesh. The particle size of the hard particle material affects the performance of the protective layer and the processing process. If the particle size of the hard particles is too small, it will be difficult to disperse the particle material, and the hard particle material is likely to aggregate during the mixing and manufacturing process of the composite material. The silicon-containing coating material cannot completely wrap the hard particle material, resulting in a decline in the performance of the protective layer, and there are problems such as clogging of the powder supply pipe during the manufacturing process of the protective layer. If the particle size of the hard particles is too large, the gaps between the particles in the protective layer will become larger, the porosity of the protective layer will increase, affecting the performance such as the strength and cleaning convenience of the protective layer. Moreover, if the particles are too large, the surface of the particles cannot be sufficiently heated and melted during the manufacturing process, affecting the quality of the product. By using the hard particle material within the above particle size range, the mixing of the silicon-containing coating material and the hard particle material can be made uniform, and the silicon-containing coating material can be uniformly adhered to the surface of the hard particles, and it contributes to subsequent processes such as granulation. At the same time, by using the hard particle material within the above particle size range, uniform dispersion of the hard particle material in the protective layer is ensured, the porosity of the protective layer is reduced, and the protective layer has excellent wear resistance, strength, cleaning convenience and other performances.

[0031] Specifically, the particle size of the hard particle material is 300 mesh to 600 mesh. For example, the particle size of the hard particle material is 300 mesh to 500 mesh, 300 mesh to 400 mesh, 400 mesh to 600 mesh, 400 mesh to 500 mesh, 500 mesh to 600 mesh, etc. For example, the particle size of the hard particle material is 300 mesh, 325 mesh, 400 mesh, 500 mesh, 600 mesh, etc.

[0032] Specifically, the metal coating material can select at least one of titanium, nickel, chromium, silver, copper, iron, molybdenum, titanium alloy, steel, aluminum alloy, Ni-Cr alloy, Ni-Cu alloy, Co-Cr-W alloy, Ni-Cr-Al-Y alloy, Co-Cr-Al-Y alloy and Fe-Cr-Al-Y alloy.

[0033] The composite material is a powder core wire or a composite powder material. The powder core wire uses a hard particle material coated with a silicon-containing coating material as the powder core and a metal coating material as the outer skin. The composite powder material has a core-shell structure, uses a hard particle material as the core, and is sequentially coated with a silicon-containing coating material and a metal coating material. The composite material can be manufactured in the form of a powder core wire or a composite powder material to suit various processing processes. The powder core wire has a short manufacturing cycle, low production cost, and high applicability. The outer layer of the composite powder material is uniformly coated with metal, and the performance of the particles is uniform.

[0034] The present invention further provides a method for manufacturing a composite material for cooking utensils. The manufacturing method includes the steps of uniformly mixing a hard particle material and a silicon-containing coating material so that the silicon-containing coating material uniformly coats the hard particle material; manufacturing composite particles with a surface coated with the silicon-containing coating material by spray granulation or drying-crushing the mixture of the hard particle material and the silicon-containing coating material; and secondarily coating the composite particles with a metal coating material to obtain a composite material for cooking utensils. During manufacturing, first, the hard particle material and the silicon-containing coating material are mechanically mixed to sufficiently bring the silicon-containing coating material into contact with the surface of the hard particle material to sufficiently perform primary coating on the hard particle material. Then, spray granulation or drying-crushing is performed on the mixture to manufacture a composite particle material. Finally, the composite particle material is secondarily coated with a metal coating material using it as the core to form a composite material having a three-layer sandwich structure of "hard substrate-soft substrate-hard substrate". The manufactured composite material has a uniform structure for each layer, a tight and strong bond between the materials of each layer, and stable and excellent performance.

[0035] As the secondary coating method, any one of a powder / tube coating method, a powder / outer skin coating method, vacuum plating, and chemical plating is adopted. In the case of a composite material in the form of a powder core wire, secondary coating is performed by the powder / tube coating method or the powder / outer skin coating method. First, a metal coating material is manufactured as a metal tube or a metal thin strip, and then composite particles primary-coated with a silicon-containing coating material are filled into the metal tube or the metal thin strip as a coating outer skin. Further, processes such as continuous rolling, tensioning, and diameter reduction are performed to obtain a powder core wire of a predetermined specification. This method does not require processes such as high-temperature heating and smelting, has a short manufacturing cycle, low production cost, and high applicability. In the case of a composite material in the form of a powder material, secondary coating is performed by vacuum plating or chemical plating, and a metal coating material is plated on the surface of the composite particles primary-coated with a silicon-containing coating material by vacuum plating and chemical plating, and the coating is uniform and the performance of the particles is uniform.

[0036] The present invention further provides a cooking appliance, which includes a base body and a protective layer. The base body includes a surface adjacent to food, and the protective layer is provided at least on the surface of the base body adjacent to food, and the protective layer is made of the above composite material. The protective layer structure includes a hard particle skeleton, a silicon-containing coating material and a metal bonding phase. During use, after the metal bonding phase on the surface layer is partially worn away, the silicon-containing coating material close to the surface layer first exhibits its properties, giving the cooking appliance the convenience of cleaning. As the surface layer material gradually wears out during use, the silicon-containing coating material inside the protective layer is gradually exposed to the surface layer, ensuring the lasting cleaning convenience of the protective layer. In addition, the silicon-containing coating material exposed on the surface decomposes under high-temperature conditions such as dry burning of the cooking appliance, forming fine pores, and oil can accumulate in these pores, contributing to the improvement of the cleaning convenience of the cooking appliance. At the same time, silane, siloxane, silane polymer, and siloxane polymer can form a substance structure with low surface energy and high hardness such as Si-C, Si-O, and C after thermal decomposition. Due to the above substance structure, after the silicon-containing coating material is heated and decomposed, the protective layer can still maintain good cleaning convenience, strength, and wear resistance. Even under high-temperature conditions such as dry burning, the cooking appliance can still ensure good strength, wear resistance, and cleaning convenience. The Vickers hardness of the protective layer is 750HV - 1000HV, the surface hydrophobic angle of the protective layer is 110° - 150°, and even after being treated 10,000 times with a nylon non-woven fabric, the surface hydrophobic angle is greater than 100°, having lasting wear resistance, corrosion resistance, and cleaning convenience.

[0037] A protective layer is formed by spraying or thermal cladding the composite material on the surface of the base body adjacent to food. The heat source for laying can be selected from arc, ion arc or flame. When selecting an arc or ion arc heat source, the heat source voltage is 30V - 80V and the current is 150A - 600A. The protective layer is manufactured by spraying or thermal cladding. The metal coating material on the outer layer of the composite material is heated and melted during manufacturing, firmly bonded to the surface of the cooking appliance, and at the same time, the hard particles coated with the silicon-containing coating material are also firmly bonded together integrally. The manufactured protective layer has excellent strength, wear resistance, and lasting cleaning convenience, and is not easy to fall off.

[0038] Furthermore, the surface of the protective layer is infiltrated and modified with a low surface energy material. When using thermal processes such as thermal spraying and hot cladding, due to the deviation of actual operation and the local thermal decomposition of the silicon-containing coating material, certain holes and pores are generated on the surface of the protective layer. After manufacturing the protective layer, infiltrating and modifying the protective layer with a low surface energy material can further reduce the surface freedom of the protective layer and improve the cleaning convenience of the cooking utensil. As the low surface energy material, fatty acids, silicone oil, silicon titanate, etc. can be selected.

[0039] Hereinafter, the composite material of the present invention, its manufacturing method, and the cooking utensil will be described in detail together with examples.

[0040] Example 1 Raw materials: The hard particle material is composite particles formed by mixing silicon oxide particles and titanium oxide particles at a mass ratio of 1:1. The particle size of the hard particle material is 400 mesh. The components of the silicon-containing coating material are dimethicone, ethanol, and isopropanol. The mass ratio of dimethicone is 60%, the mass ratio of ethanol is 20%, and the mass ratio of isopropanol is 20%. The outer layer coating material is TC4 titanium alloy.

[0041] Manufacture of the composite material: The silicon oxide / titanium oxide composite particles and the silicon-containing coating material are sufficiently mixed in a mixer at a mass ratio of 1:2. After sufficient and uniform mixing, the mixture is dried and granulated by a spray granulation method to obtain composite particles whose surface is coated with dimethicone. The manufactured composite particles are filled into a titanium alloy ribbon as the outer skin, and through processes such as continuous rolling, pulling, and diameter reduction, a composite powder core wire with a diameter of 2 mm is obtained. The structural schematic diagram of the composite powder core wire is shown in Figure 1. The surface layer of the hard particles is coated with a silicon-containing coating material mainly composed of dimethicone, and the entire outside of the composite particles is coated with a titanium alloy outer skin.

[0042] Manufacture of the cooking utensil: Cleaning and roughening the inner surface of the pot body: Remove rust from the inner surface of the pot body, ultrasonically clean it with alcohol and dry it. Then, roughen the inner surface of the pot body by sandblasting. Plasma spraying: Using the manufactured composite powder core wire as the raw material, in the plasma spraying process, spray a protective layer on the inner surface of the pot body after cleaning and roughening. In the spraying process, the heat source voltage is 50V and the current is 300A. Surface modification of the protective layer: The surface of the protective layer obtained by spraying was infiltrated and modified with silicon titanate.

[0043] As can be seen from the SEM photograph of the protective layer of the cooking utensil in Figure 2, the hard particles 1 whose surfaces in the protective layer are coated with a silicon-containing coating material are dispersed in the metal bonding phase 2 formed by melting the metal coating material, and the metal bonding phase 2 integrally bonds each hard particle.

[0044] Performance of the protective layer: The Vickers hardness of the protective layer is 900HV, the surface hydrophobic angle of the protective layer is 145°, and after being treated 10,000 times with a nylon non-woven fabric, the surface hydrophobic angle becomes 130°.

[0045] Example 2 Raw materials: The hard particle material uses Ni-Cr alloy particles with a particle size of 325 mesh. The components of the silicon-containing coating material are methyltriethoxysilane, glycerin, sodium stearate, and ethanol. The mass ratio of methyltriethoxysilane is 50%, the mass ratio of sodium stearate is 10%, the mass ratio of glycerin is 20%, and the mass ratio of ethanol is 20%. The outer coating material uses metallic copper.

[0046] Manufacture of the composite material: Mix Ni-Cr alloy particles and the silicon-containing coating material in a mass ratio of 1:3 in a mixer and mix them thoroughly. After mixing sufficiently and uniformly, dry and granulate the mixture by the method of spray granulation to obtain composite particles whose surfaces are coated with methyltriethoxysilane. The manufactured composite particles are electroplated with a metallic copper coating layer by the method of vacuum magnetron sputtering. A schematic diagram of the manufactured composite powder structure is shown in FIG. 3. The surface layer of the hard particles is coated with a silicon-containing coating material mainly composed of methyltriethoxysilane, and the outside of the silicon-containing coating material is coated with metallic copper.

[0047] Manufacture of cooking utensils: Cleaning and roughening the inner surface of the pot body: The inner surface of the pot body is descaled, ultrasonically cleaned with alcohol and dried, and then the inner surface of the pot body is roughened by sandblasting. Plasma spraying: Using the manufactured composite powder as the raw material, a protective layer is sprayed on the inner surface of the pot body after cleaning and roughening in the plasma spraying process. In the spraying process, the heat source voltage is 30V and the current is 150A. Performance of the protective layer: The Vickers hardness of the protective layer is 1000HV, the surface hydrophobic angle of the protective layer is 135°, and after being treated 10,000 times with a nylon non-woven fabric, the surface hydrophobic angle becomes 120°.

[0048] The embodiments of the present invention have been shown and described above. However, the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art should understand that changes, modifications, substitutions, and variations can be made to the above embodiments within the scope of the present invention.

Explanation of reference signs

[0049] 1 - Hard particles with a surface coated with a silicon-containing coating material, 2 - Metallic bonding phase.

Claims

1. A composite material for cooking utensils, wherein the composite material includes a hard particle material, a silicon-containing coating material, and a metal coating material, the silicon-containing coating material is coated outside the hard particle material, the metal coating material is coated outside the silicon-containing coating material, and the main components of the silicon-containing coating material are at least one of silane, siloxane, silane polymer, and siloxane polymer. A composite material for cooking utensils, characterized in that.

2. The siloxane polymer is selected from at least one of methyl silicone oil and dimethicone, and the silane is selected from at least one of tetraethoxysilane and methyltriethoxysilane. The composite material according to claim 1, characterized in that.

3. In the silicon-containing coating material, the mass ratio of the main component is 20% to 80%. The composite material according to claim 1, characterized in that.

4. The mass ratio of the hard particle material to the silicon-containing coating material is 1:1 to 1:

3. The composite material for cooking utensils according to claim 1, characterized in that.

5. The hard particle material is selected from at least one of a metal material, a ceramic material, carbon particles, and metal silicon. The composite material according to claim 1, characterized in that.

6. The metal material is selected from at least one of titanium, nickel, chromium, silver, copper, iron, molybdenum, titanium alloy, aluminum alloy, stainless steel, Ni-Cr alloy, Ni-Cu alloy, Co-Cr-W alloy, Ni-Cr-Al-Y alloy, Co-Cr-Al-Y alloy, and Fe-Cr-Al-Y alloy. The ceramic material is selected from at least one of silicon carbide, silicon oxide, hexagonal boron nitride, yttrium oxide, zirconium oxide, and titanium oxide. The carbon particles are selected from at least one of graphite particles, graphene particles, and carbon fiber particles. The composite material according to claim 5, characterized in that.

7. The particle size of the hard particle material is 300 mesh to 600 mesh. The composite material according to claim 1, characterized in that.

8. The composite material is a powder core wire or a composite powder material, The powder core wire uses the hard particle material coated with the silicon-containing coating material as the powder core and the metal coating material as the outer skin, The composite powder material has a core-shell structure, with a hard particle material as the core and is sequentially coated with a silicon-containing coating material and a metal coating material. The composite material according to any one of claims 1 to 7, characterized in that.

9. A method for manufacturing the composite material according to any one of claims 1 to 8, comprising: A step of uniformly mixing the hard particle material and the silicon-containing coating material so that the silicon-containing coating material uniformly coats the hard particle material; A step of producing composite particles having a surface coated with the silicon-containing coating material by spray granulation or drying-grinding of the mixture of the hard particle material and the silicon-containing coating material; A step of secondarily coating the composite particles having a surface coated with the silicon-containing coating material with the metal coating material to obtain the composite material for the cooking appliance. The method for manufacturing a composite material, characterized in that it comprises.

10. The method of the secondary coating includes any one of a powder / tube coating method, a powder / skin coating method, vacuum plating, and chemical plating. The manufacturing method according to claim 9, characterized in that.

11. A cooking appliance, the cooking appliance includes a base body and a protective layer, The base body includes a surface adjacent to food, The protective layer is provided at least on the surface of the base body that contacts food, and is made of the composite material according to any one of claims 1 to 8. The cooking appliance, characterized in that.

12. The protective layer is formed by laying the composite material on the surface of the base body that contacts food by a thermal spraying or thermal cladding method. The cooking appliance according to claim 11, characterized in that.

13. The protective layer is further subjected to penetration and modification treatment using a low surface energy material. The cooking appliance according to claim 12, characterized in that.

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