Color-coated sheet as well as preparation method and application thereof

Abstract

The invention relates to a color-coated sheet and a preparation method and application thereof, and belongs to the technical field of sheet production. The color-coated sheet comprises a base plate and a coating, the base plate is coated with the coating, the coating comprises a surface coating, the material of the surface coating comprises a functional inorganic auxiliary agent, the inorganic auxiliary agent comprises a first substance and a second substance, and the first substance comprises at least one of zinc oxide, nickel oxide, bismuth vanadate, graphene and carbon nitride; the second substance comprises titanium dioxide; a first substance and a second substance are mixed and ground to obtain the heterojunction photocatalyst, and the heterojunction photocatalyst is used as a functional inorganic auxiliary agent. The functional inorganic auxiliary agent is added to the surface coating, oxygen in air and hydroxyl in water molecules can be converted into free radicals under irradiation of visible light, the free radicals can continuously achieve the antibacterial, antiviral and formaldehyde removal effects in a certain space range, and the real-time dynamic purification effect in the space is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of plate production, and in particular to a color-coated plate and a preparation method and application thereof. Background Art

[0002] The steel plate is coated with organic coatings, which can have various colors. The color-coated steel plate is named after this, and is referred to as color-coated plate, or organic coated steel plate. Since the color-coated steel plate is coated with paint before the steel plate is processed and formed, it is also called pre-coated steel plate abroad. The organic coating of the color-coated plate plays a covering and isolating role, which can prevent the steel plate from rusting and prolong the service life. For specific home appliance fields and medical fields, such as disinfection cabinets and other related home appliances, the color-coated plate needs to have a good bactericidal effect. Usually, silver ion coating is added by coating. When microorganisms contact the coating, the silver ions affect the growth and reproduction of microorganisms and cause death, thereby playing a bactericidal effect. However, this solution can only play an antibacterial role, and the silver ions will participate in the reaction. When the silver ions are consumed, the bactericidal effect disappears. In addition, this method can only play a bactericidal effect after the bacteria contact the coating. Summary of the invention

[0003] The present application provides a color-coated plate and its preparation method and application, which can continuously play multiple functions such as antibacterial, antiviral, formaldehyde removal, and TVOC removal within a certain spatial range.

[0004] In the first aspect, the present application provides a color-coated plate, which includes a substrate and a coating, wherein the coating is applied to the substrate, the coating includes a top coating, the material of the top coating includes a functional inorganic additive, and the components of the inorganic additive include a first substance and a second substance, the first substance includes at least one of zinc oxide, nickel oxide, bismuth vanadate, graphene and carbon nitride; the second substance includes titanium dioxide.

[0005] As an optional implementation manner, the mass ratio of the first substance to the second substance is 1:(10-100).

[0006] As an optional embodiment, the material of the top coating layer further includes a top coating substrate, and the top coating substrate includes at least one of silicon-modified polyurethane, fluorocarbon polyester and polyurethane.

[0007] As an optional implementation manner, the mass ratio of the top coating substrate to the functional inorganic additive is 100:(2-5).

[0008] As an optional embodiment, the coating further comprises a primer layer; the primer layer is disposed between the substrate and the top coating layer; and / or

[0009] The material of the base coating layer includes at least one of polyurethane, epoxy resin and polyester resin; and / or

[0010] The thickness of the primer layer is 2 μm to 20 μm; and / or

[0011] The thickness of the top coating layer is 7 μm to 100 μm.

[0012] As an optional embodiment, the substrate comprises a substrate body and a passivation layer, the passivation layer is attached to the substrate body, and the passivation layer is located between the substrate body and the coating; and / or

[0013] The substrate body includes a pure zinc substrate, an aluminum-zinc substrate or an aluminum-zinc-aluminum-magnesium substrate.

[0014] In a second aspect, the present application provides a method for preparing a color-coated plate, wherein the color-coated plate is the color-coated plate provided in the first aspect, and the method comprises:

[0015] obtaining a substrate;

[0016] A coating is prepared on the surface of the substrate to obtain a color-coated plate.

[0017] As an optional embodiment, obtaining the substrate includes:

[0018] Get the substrate body,

[0019] Passivating the substrate body to form a passivation layer on the surface of the substrate body;

[0020] Wherein, during the passivation baking process, the PMT of the substrate body is baked at 80° C. to 120° C. for 4 s to 10 s.

[0021] As an optional embodiment, the step of preparing a coating on the surface of the substrate to obtain a color-coated plate comprises:

[0022] Applying a primer material to the surface of the substrate, and then performing a first gradient baking and a first gradient cooling to form a primer layer on the surface of the substrate to obtain an intermediate plate;

[0023] The first substance and the second substance are mixed and ground to obtain a functional inorganic additive;

[0024] Mixing the functional inorganic additive and the topcoat base material to obtain a topcoat material;

[0025] Applying a primer material to the primer coating surface of the intermediate plate, and then performing a second gradient baking and a second gradient cooling to form a primer coating on the surface of the intermediate plate; obtaining a color-coated plate;

[0026] Wherein, the temperature of the first gradient baking is 175°C to 245°C; the time of the first gradient baking is 20s to 60s;

[0027] The mixing and grinding time is 10min to 120min;

[0028] The temperature of the second gradient baking is 190° C. to 275° C.; the time of the second gradient baking is 20 s to 60 s.

[0029] In a third aspect, the present application provides a component, which is made of the color-coated plate provided in the first aspect.

[0030] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0031] The color-coated plate provided in the embodiment of the present application is prepared by mixing and grinding a first substance and a second substance to obtain a heterojunction photocatalyst, which is used as a functional inorganic additive. By adding a functional inorganic additive to the top coating, it can convert oxygen in the air and hydroxyl groups in water molecules into free radicals under the irradiation of visible light (sunlight, light, moonlight, etc.). The free radicals have extremely strong oxidizing ability and can destroy the cell membranes of bacteria and the protein carriers of coagulated viruses, and can effectively decompose various organic compounds and some inorganic substances, and ultimately degrade them into harmless small molecules such as H2O and CO2. Therefore, the free radicals can continuously achieve antibacterial, antiviral and formaldehyde removal effects within a certain spatial range, thereby achieving a real-time dynamic purification effect in the space. In addition, the color-coated plate has good adhesion performance and salt spray corrosion resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0034] Figure 1 A schematic diagram of the structure of a color-coated plate provided in an embodiment of the present application;

[0035] Figure 2 A flowchart of the method provided in the embodiment of the present application.

[0036] Figure numerals: 1 - substrate, 11 - substrate body, 12 - passivation layer, 2 - coating, 21 - bottom coating, 22 - top coating. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0038] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in this application can be purchased from the market or prepared by existing methods.

[0039] In order to make the color-coated steel sheet have a bactericidal function, silver ion coating is usually added through coating. When microorganisms contact the coating, the silver ions affect the growth and reproduction of microorganisms and cause their death, thus achieving a bactericidal effect. However, this solution has a single function and only plays an antibacterial role. Moreover, when silver ions participate in the reaction, the steel strip loses its antibacterial effect after the silver ions are consumed. In addition, this method can only achieve a bactericidal effect after bacteria contact the coating, so the antibacterial effect can only be achieved on the surface of the color-coated steel sheet.

[0040] To this end, the present application intends to provide a color-coated plate, so that it can continuously play multiple functions such as antibacterial, antiviral, formaldehyde removal, and TVOC removal within a certain spatial range. The structure of the color-coated plate includes a substrate body and a passivation layer, a primer layer, and a topcoat layer sequentially arranged outside the substrate body. The passivation layer and the primer layer have an anti-corrosion function, and the topcoat layer is a composite material formed by a resin material and a functional inorganic additive. The topcoat layer can not only protect the underlying metal and plating layer of the color-coated plate, and realize the exquisite appearance of the color-coated plate, but also because of the antibacterial, antiviral, formaldehyde removal, and TVOC removal functions of the functional inorganic additive, the color-coated plate has a space purification function, and has excellent antibacterial, antiviral, formaldehyde removal, and TVOC removal space purification functionality. Moreover, the coating adhesion performance and salt spray corrosion resistance of the color-coated plate are at the same level as those of existing ordinary color-coated products. Conventional performance, unconventional performance and corrosion resistance all meet the requirements. The overall production process is stable, and it has a space purification effect of resistance to Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa ≥90%, anti-influenza A virus activity value ≥2.0, formaldehyde removal rate ≥80%, and TVOC removal rate ≥35%.

[0041] Figure 1 The schematic diagram of the structure of the color-coated plate provided in the embodiment of the present application is as follows: Figure 1As shown, an embodiment of the present application provides a color-coated plate, which includes a substrate and a coating, the coating is applied to the substrate, the coating includes a top coating, the material of the top coating includes a functional inorganic additive, the components of the inorganic additive include a first substance and a second substance, the first substance includes at least one of zinc oxide, nickel oxide, bismuth vanadate, graphene and carbon nitride; the second substance includes titanium dioxide.

[0042] The color-coated plate is prepared by mixing and grinding a first substance and a second substance to obtain a heterojunction photocatalyst, which is used as a functional inorganic additive. By adding a functional inorganic additive to the top coating, the oxygen in the air and the hydroxyl groups in the water molecules are converted into free radicals under the irradiation of visible light (sunlight, lamplight, moonlight, etc.). The free radicals have extremely strong oxidizing ability and can destroy the cell membranes of bacteria and the protein carriers of coagulated viruses, and can effectively decompose various organic compounds and some inorganic substances, and finally degrade them into harmless small molecules such as H2O and CO2. Therefore, the free radicals can continuously achieve antibacterial, antiviral and formaldehyde removal effects within a certain spatial range, thereby achieving a real-time dynamic purification effect in the space. In addition, the color-coated plate has good adhesion performance and salt spray corrosion resistance.

[0043] In some embodiments, the mass ratio of the first substance to the second substance is 1:(10-100). By controlling the mass ratio of the first substance to the second substance to be 1:(10-100), it is beneficial to improve the ability of the functional inorganic additive to convert oxygen in the air and hydroxyl groups in water molecules into free radicals, which is beneficial to the antibacterial, antiviral, formaldehyde removal, TVOC removal and other properties of the color-coated board.

[0044] In some embodiments, the material of the top coating layer further comprises a top coating substrate, and the top coating substrate comprises at least one of silicon-modified polyurethane (SMP), fluorocarbon polyester, and polyurethane.

[0045] In some embodiments, the mass ratio of the topcoat substrate to the functional inorganic additive is 100:(2-5). By controlling the mass ratio of the topcoat substrate to the functional inorganic additive to be 100:(2-5), it is beneficial to have better adhesion performance and salt spray corrosion resistance while the color-coated board has the ability to convert oxygen in the air and hydroxyl groups in water molecules into free radicals.

[0046] In some embodiments, the coating further comprises a primer layer; the primer layer is disposed between the substrate and the top coating layer; the material of the primer layer comprises at least one of polyurethane, epoxy resin and polyester resin. The provision of the primer layer is conducive to improving the adhesion between the top coating layer and the substrate.

[0047] In some embodiments, the thickness of the primer layer is 2 μm to 20 μm; the thickness of the topcoat layer is 7 μm to 100 μm.

[0048] In some embodiments, the substrate includes a substrate body and a passivation layer, the passivation layer is attached to the substrate body, and the passivation layer is located between the substrate body and the coating; the substrate body includes a pure zinc substrate (zinc accounts for 100% by mass), an aluminum-zinc substrate (aluminum accounts for 55% by mass, silicon accounts for 1.5% by mass, and zinc accounts for 43.5% by mass), and an aluminum-zinc-aluminum-magnesium substrate, wherein the aluminum-zinc-aluminum-magnesium substrate includes: a medium aluminum-zinc-aluminum-magnesium substrate (aluminum accounts for 6% by mass, magnesium accounts for 3% by mass, and zinc accounts for 91% by mass), and a high aluminum-zinc-aluminum-magnesium substrate (aluminum accounts for 55% by mass, silicon accounts for 1.5% by mass, magnesium accounts for 1.8% by mass, and zinc accounts for 41.7% by mass).

[0049] The color-coated plate solves the problem of single function of existing color-coated plates, enriches the functionality of color-coated plates, and makes them have composite functions such as antibacterial, antiviral, odor removal and formaldehyde removal, thereby improving the quality of people's living environment.

[0050] Figure 2 A flow chart of the method provided in the embodiment of the present application is as follows: Figure 2 As shown, based on a general inventive concept, the embodiment of the present application also provides a method for preparing a color-coated plate.

[0051] The method is used for preparing the above-mentioned color-coated plate. The specific content of the color-coated plate can refer to the above-mentioned embodiment. Since the method adopts part or all of the technical solutions of the above-mentioned embodiment, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiment, which will not be repeated here one by one.

[0052] In some embodiments, the method comprises:

[0053] S1. Obtain a substrate;

[0054] In some embodiments, obtaining a substrate comprises:

[0055] S1.1. Get the substrate body,

[0056] S1.2. The substrate body is passivated to form a passivation layer on the surface of the substrate body; wherein, during the passivation baking process, the PMT of the substrate body is at 80°C to 120°C, and the baking time is 4s to 10s. The passivation liquid used for passivation can be the GARDOBOND C 4508 / 2 passivation liquid sold on the market, and is applied to the surface of the substrate body by roller coating.

[0057] S2. preparing a coating on the surface of the substrate to obtain a color-coated plate.

[0058] In some embodiments, preparing a coating on the surface of the substrate to obtain a color-coated plate comprises:

[0059] S2.1. Applying a primer material to the surface of the substrate, and then performing a first gradient baking and a first gradient cooling to form a primer layer on the surface of the substrate to obtain an intermediate plate; wherein the temperature of the first gradient baking is 175°C to 245°C; and the time of the first gradient baking is 20s to 60s;

[0060] S2.2. The first substance and the second substance are mixed and ground to obtain a functional inorganic additive; wherein the mixing and grinding time is 10min to 120min;

[0061] S2.3. Mix the functional inorganic additive and the topcoat substrate to obtain a topcoat material; wherein the mixing process is accompanied by stirring, the stirring speed is 200 rpm to 800 rpm, and the stirring time is 10 minutes to 120 minutes.

[0062] S2.4. Apply the primer material to the primer surface of the intermediate plate, and then perform a second gradient baking and a second gradient cooling to form a primer on the surface of the intermediate plate; obtain a color-coated plate; wherein the temperature of the second gradient baking is 190°C to 275°C; and the time of the second gradient baking is 20s to 60s.

[0063] Based on a general inventive concept, an embodiment of the present application further provides a component, which is made of the color-coated plate provided above.

[0064] This component is realized based on the above-mentioned color-coated plate. The specific content of the color-coated plate can refer to the above-mentioned embodiment. Since this component adopts part or all of the technical solutions of the above-mentioned embodiment, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiment, which will not be repeated here one by one.

[0065] This component product can be used in crowded public spaces such as exhibition halls, transportation hubs, supermarkets; clean spaces such as hospitals, cold storages, electronic factories, biopharmaceuticals; and small spaces such as home decoration, carriages, and schools.

[0066] The present application will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are intended only to illustrate the present application and are not intended to limit the scope of the present application. The experimental methods for which specific conditions are not specified in the following examples are usually measured according to national standards. If there is no corresponding national standard, then the conditions recommended by the manufacturer are followed.

[0067] Example 1

[0068] A color-coated plate, the preparation process of which is as follows:

[0069] S1. Passivate the substrate body to obtain a substrate containing a passivation layer.

[0070] S2. Coating a primer material on the surface of the passivation layer of the substrate, performing a first gradient baking, and then performing a first gradient cooling to form a primer layer on the surface of the passivation layer to obtain an intermediate plate.

[0071] S3. coating the surface of the primer layer of the intermediate plate with a topcoat material, performing a second gradient baking, and then performing a second gradient cooling to form a topcoat on the surface of the primer layer to obtain a color-coated plate.

[0072] Among them, the passivation liquid used for passivation is Chemetall GARDOBOND C 4508 / 2 passivation liquid, the passivation baking temperature is 90°C, the first gradient baking temperature is 232°C, the topcoat material is a material obtained by mixing PE topcoat and functional inorganic additives and fully stirring at a speed of 500 rpm for 15 minutes, the mass ratio of PE topcoat and functional inorganic additives is 100:1, the functional inorganic additive is a material made by mixing and grinding zinc oxide and titanium dioxide, the mass ratio of zinc oxide and titanium dioxide is 1:55, and the second gradient baking temperature is 241°C.

[0073] Example 2

[0074] A color-coated plate, the preparation process of which is as follows:

[0075] S1. Passivate the substrate body to obtain a substrate containing a passivation layer.

[0076] S2. Coating a primer material on the surface of the passivation layer of the substrate, performing a first gradient baking, and then performing a first gradient cooling to form a primer layer on the surface of the passivation layer to obtain an intermediate plate.

[0077] S3. coating the surface of the primer layer of the intermediate plate with a topcoat material, performing a second gradient baking, and then performing a second gradient cooling to form a topcoat on the surface of the primer layer to obtain a color-coated plate.

[0078] Among them, the passivation liquid used for passivation is Chemetall GARDOBOND C 4508 / 2 passivation liquid, the passivation baking temperature is 90°C, the first gradient baking temperature is 232°C, the topcoat material is a material obtained by mixing PE topcoat and functional inorganic additives and fully stirring at a speed of 500 rpm for 15 minutes, the mass ratio of PE topcoat and functional inorganic additives is 100:2, the functional inorganic additive is a material made by mixing and grinding zinc oxide and titanium dioxide, the mass ratio of zinc oxide and titanium dioxide is 1:55, and the second gradient baking temperature is 241°C.

[0079] Example 3

[0080] A color-coated plate, the preparation process of which is as follows:

[0081] S1. Passivate the substrate body to obtain a substrate containing a passivation layer.

[0082] S2. Coating a primer material on the surface of the passivation layer of the substrate, performing a first gradient baking, and then performing a first gradient cooling to form a primer layer on the surface of the passivation layer to obtain an intermediate plate.

[0083] S3. coating the surface of the primer layer of the intermediate plate with a topcoat material, performing a second gradient baking, and then performing a second gradient cooling to form a topcoat on the surface of the primer layer to obtain a color-coated plate.

[0084] Among them, the passivation liquid used for passivation is Chemetall GARDOBOND C 4508 / 2 passivation liquid, the passivation baking temperature is 90°C, the first gradient baking temperature is 232°C, the topcoat material is a material obtained by mixing PE topcoat and functional inorganic additives and fully stirring at a speed of 500 rpm for 15 minutes, the mass ratio of PE topcoat and functional inorganic additives is 100:5, the functional inorganic additive is a material made by mixing and grinding zinc oxide and titanium dioxide, the mass ratio of zinc oxide and titanium dioxide is 1:55, and the second gradient baking temperature is 241°C.

[0085] Example 4

[0086] A color-coated plate, the preparation process of which is as follows:

[0087] S1. Passivate the substrate body to obtain a substrate containing a passivation layer.

[0088] S2. Coating a primer material on the surface of the passivation layer of the substrate, performing a first gradient baking, and then performing a first gradient cooling to form a primer layer on the surface of the passivation layer to obtain an intermediate plate.

[0089] S3. coating the surface of the primer layer of the intermediate plate with a topcoat material, performing a second gradient baking, and then performing a second gradient cooling to form a topcoat on the surface of the primer layer to obtain a color-coated plate.

[0090] Among them, the passivation liquid used for passivation is Chemetall GARDOBOND C 4508 / 2 passivation liquid, the passivation baking temperature is 90°C, the first gradient baking temperature is 232°C, the topcoat material is a material obtained by mixing PE topcoat and functional inorganic additives and fully stirring at a speed of 500 rpm for 15 minutes, the mass ratio of PE topcoat and functional inorganic additives is 100:6, the functional inorganic additive is a material made by mixing and grinding zinc oxide and titanium dioxide, the mass ratio of zinc oxide and titanium dioxide is 1:55, and the second gradient baking temperature is 241°C.

[0091] Comparative Example 1

[0092] A color-coated plate, the preparation process of which is as follows:

[0093] S1. Passivate the substrate body to obtain a substrate containing a passivation layer.

[0094] S2. Coating a primer material on the surface of the passivation layer of the substrate, performing a first gradient baking, and then performing a first gradient cooling to form a primer layer on the surface of the passivation layer to obtain an intermediate plate.

[0095] S3. coating the surface of the primer layer of the intermediate plate with a topcoat material, performing a second gradient baking, and then performing a second gradient cooling to form a topcoat on the surface of the primer layer to obtain a color-coated plate.

[0096] Among them, the passivation liquid used for passivation is Chemetall GARDOBOND C 4508 / 2 passivation liquid, the passivation baking temperature is 90°C, the first gradient baking temperature is 232°C, the topcoat material is a material obtained by mixing PE topcoat and functional inorganic additives and fully stirring at a speed of 500 rpm for 15 minutes, the mass ratio of PE topcoat and functional inorganic additives is 100:1, the functional inorganic additive is a material made by mixing and grinding calcium silicate and titanium dioxide, the mass ratio of calcium silicate and titanium dioxide is 1:55, and the second gradient baking temperature is 241°C.

[0097] Comparative Example 2

[0098] A color-coated plate, the preparation process of which is as follows:

[0099] S1. Passivate the substrate body to obtain a substrate containing a passivation layer.

[0100] S2. Coating a primer material on the surface of the passivation layer of the substrate, performing a first gradient baking, and then performing a first gradient cooling to form a primer layer on the surface of the passivation layer to obtain an intermediate plate.

[0101] S3. coating the surface of the primer layer of the intermediate plate with a topcoat material, performing a second gradient baking, and then performing a second gradient cooling to form a topcoat on the surface of the primer layer to obtain a color-coated plate.

[0102] Among them, the passivation liquid used for passivation is Chemetall GARDOBOND C 4508 / 2 passivation liquid, the passivation baking temperature is 90°C, the first gradient baking temperature is 232°C, the topcoat material is a material obtained by mixing PE topcoat and functional inorganic additives and fully stirring at a speed of 500 rpm for 15 minutes, the mass ratio of PE topcoat and functional inorganic additives is 100:1, the functional additive is a material made by mixing and grinding silver ion antibacterial agent and titanium dioxide, the mass ratio of silver ion antibacterial agent and titanium dioxide is 1:55, and the second gradient baking temperature is 241°C.

[0103] The color-coated plates provided in the embodiments and comparative examples were subjected to conventional performance tests, with reference to the test standard GB / T13448, and the results are shown in the following table:

[0104]

[0105] It can be seen from the above table that the color-coated panels prepared by the method provided in the examples of the present application can all pass conventional performance tests.

[0106] The color-coated plates provided in the embodiments and comparative examples were subjected to unconventional long-term performance tests, with reference to the test standard GB / T13448. The results are shown in the following table:

[0107]

[0108] It can be seen from the above table that the color-coated panels prepared by the method provided in the examples of the present application can all pass the unconventional long-term performance test.

[0109] The color-coated plates provided in the embodiments and comparative examples were subjected to antibacterial tests, and the test reference standard GB / T30706-2014 was used. The results are shown in the following table:

[0110]

[0111] It can be seen from the above table that the color-coated panels prepared by the method provided in the embodiments of the present application have good antibacterial effects under light conditions, especially when the mass ratio of the topcoat substrate to the functional inorganic additive is above 100:2, they have good antibacterial effects.

[0112] The color-coated panels provided in each embodiment and comparative example were subjected to antiviral tests under light conditions, specifically including antiviral performance tests and antiviral durability tests. The antiviral performance test referenced the standard T / CNCIA 03002-2020, and the antiviral durability test referenced the standard ISO18184-2019. The virus used was H1N1 influenza A virus. The results are shown in the following table:

[0113]

[0114] It can be seen from the above table that the color-coated panels prepared by the method provided in the examples of the present application have good resistance to influenza A virus under light conditions.

[0115] The color-coated panels provided in the embodiments and comparative examples were subjected to formaldehyde removal tests under light conditions, specifically including formaldehyde resistance test and toluene resistance test. The formaldehyde resistance test reference standard is QB / T 2761-2006, and the toluene resistance test reference standard is JC / T1074-2021. The volume of the test chamber is 15m 3 , the area of ​​color-coated plate is 15m 2 , the test time is 24h, the results are shown in the following table:

[0116] Formaldehyde resistance Toluene resistance Index requirements Formaldehyde removal rate ≥80% Toluene removal rate ≥35% Example 1 71.80％ 69.40％ Example 2 90.60％ 88.10％ Example 3 92.50％ 90.30％ Example 4 78.30％ 59.70％ Comparative Example 1 0.30％ 0.70％ Comparative Example 2 0.80％ 0.40％

[0117] It can be seen from the above table that the color-coated panels prepared by the method provided in the embodiments of the present application have good formaldehyde removal performance under light conditions, especially when the mass ratio of the topcoat substrate and the functional inorganic additive is above 100:2, and also have good formaldehyde resistance and toluene resistance.

[0118] Various embodiments of the present application may be presented in the form of a range; it should be understood that the description in the form of a range is only for convenience and brevity, and should not be understood as a rigid limitation on the scope of the present application; therefore, the range description should be considered to have specifically disclosed all possible sub-ranges and single numerical values ​​within the range. For example, the range description from 1 to 6 should be considered to have specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the range, such as 1, 2, 3, 4, 5 and 6, which apply regardless of the range. In addition, whenever a numerical range is indicated herein, it is meant to include any cited number (fractional or integer) within the indicated range.

[0119] In the present application, in the absence of any contrary description, the directional words used, such as "upper" and "lower", are specifically the directions of the drawings in the accompanying drawings. In addition, in the description of the present specification, the terms "including", "comprising", etc. refer to "including but not limited to". In this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. In this article, "and / or" describes the association relationship of the associated objects, indicating that there may be three relationships, for example, A and / or B, which can represent: A exists alone, A and B exist at the same time, and B exists alone. Wherein A, B can be singular or plural. In this article, "at least one" refers to one or more, and "plural" refers to two or more. "At least one", "at least one of the following" or similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, "at least one of a, b or c", or "at least one of a, b and c", can both mean: a, b, c, ab (i.e. a and b), ac, bc, or abc, where a, b and c can be single or multiple.

[0120] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A color-coated sheet, characterized in that: The color-coated plate includes a substrate and a coating, the coating is applied to the substrate, the coating includes a top coating, the material of the top coating includes a functional inorganic additive, the components of the inorganic additive include a first substance and a second substance, the first substance includes at least one of zinc oxide, nickel oxide, bismuth vanadate, graphene and carbon nitride; the second substance includes titanium dioxide.

2. The color-coated sheet according to claim 1, characterized in that: The mass ratio of the first substance to the second substance is 1:(10-100).

3. The color-coated sheet according to claim 1, characterized in that: The material of the top coating layer also includes a top coating substrate, and the top coating substrate includes at least one of silicon-modified polyurethane, fluorocarbon polyester and polyurethane.

4. The color-coated sheet according to claim 3, characterized in that: The mass ratio of the top coating substrate to the functional inorganic auxiliary agent is 100:(2-5).

5. The color-coated sheet according to any one of claims 1 to 4, characterized in that: The coating further comprises a primer layer; the primer layer is disposed between the substrate and the top coating layer; and / or The material of the base coating layer includes at least one of polyurethane, epoxy resin and polyester resin; and / or The thickness of the primer layer is 2 μm to 20 μm; and / or The thickness of the top coating layer is 7 μm to 100 μm.

6. The color-coated sheet according to claim 1, characterized in that: The substrate comprises a substrate body and a passivation layer, wherein the passivation layer is attached to the substrate body and the passivation layer is located between the substrate body and the coating; and / or The substrate body includes a pure zinc substrate, an aluminum-zinc substrate or an aluminum-zinc-aluminum-magnesium substrate.

7. A method for preparing a color-coated plate, characterized in that: The color-coated plate is a color-coated plate according to any one of claims 1 to 6, and the method comprises: obtaining a substrate; A coating is prepared on the surface of the substrate to obtain a color-coated plate.

8. The method for preparing a color-coated plate according to claim 7, characterized in that: The substrate obtained comprises: Get the substrate body, Passivating the substrate body to form a passivation layer on the surface of the substrate body; Wherein, during the passivation baking process, the PMT of the substrate body is baked at 80° C. to 120° C. for 4 s to 10 s.

9. The method for preparing a color-coated plate according to claim 7, characterized in that: The method of preparing a coating on the surface of the substrate to obtain a color-coated plate comprises: Applying a primer material to the surface of the substrate, and then performing a first gradient baking and a first gradient cooling to form a primer layer on the surface of the substrate to obtain an intermediate plate; The first substance and the second substance are mixed and ground to obtain a functional inorganic additive; Mixing the functional inorganic additive and the topcoat base material to obtain a topcoat material; Applying a primer material to the primer coating surface of the intermediate plate, and then performing a second gradient baking and a second gradient cooling to form a primer coating on the surface of the intermediate plate; obtaining a color-coated plate; Wherein, the temperature of the first gradient baking is 175°C to 245°C; the time of the first gradient baking is 20s to 60s; The mixing and grinding time is 10min to 120min; The temperature of the second gradient baking is 190° C. to 275° C.; the time of the second gradient baking is 20 s to 60 s.

10. A component, characterized in that: The component is made of the color-coated plate according to any one of claims 1 to 6.

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