Manufacturing method of antibacterial and mildew-proof plate and antibacterial and mildew-proof plate

Abstract

The invention provides a manufacturing method of an antibacterial and mildew-proof plate and the plate. The manufacturing method comprises the steps that the surface of a base material is coated with at least one layer of primer, the primer is subjected to first curing treatment, and a primer layer covering the surface of the base material is formed. Coating at least one layer of finish paint on the surface of the primer layer, and spraying nanoscale modified titanium dioxide emulsion on the surface of the liquid finish paint when one layer of finish paint far away from the base material is in a liquid state; and carrying out second curing treatment on the liquid finishing coat, so that at least one finishing coat forms a finishing coat layer, the nano-scale modified titanium dioxide emulsion forms an antibacterial layer, and the antibacterial and mildew-proof plate is obtained. According to the antibacterial and mildew-proof plate obtained by the manufacturing method provided by the invention, the nano-scale modified titanium dioxide particles can be firmly loaded on the surface of the plate. And meanwhile, the nano-scale modified titanium dioxide particles cannot be coated by the finish paint and can be in direct contact with harmful organic matters, so that the antibacterial and mildew-proof effects are achieved. Therefore, the manufactured antibacterial and mildew-proof plate has good and long-acting antibacterial and mildew-proof effects.

Description

Technical Field

[0001] The present invention relates to the technical field of plate processing, and in particular to a method for manufacturing an antibacterial and mildew-proof plate and an antibacterial and mildew-proof plate. Background Art

[0002] As the living standards of residents improve, people's requirements for living environment are gradually increasing. Compared with plastic products, more and more people prefer floors and furniture made of natural boards such as solid wood and bamboo. During the use of these boards, mold is easy to grow in a humid environment, and bacteria in the air are also easy to adhere to the boards, affecting the service life of the boards and the cleanliness of the indoor environment. Therefore, before the boards leave the factory, they are usually treated with anti-mildew and anti-aging treatments.

[0003] Since modified titanium dioxide can play an antibacterial and mildew-proof role under the stimulation of visible light, at present, when performing mildew-proof treatment, modified titanium dioxide is usually mixed with resins, additives and other materials to be applied as a coating on the surface of the plate. However, when the coating is cured on the surface of the plate, the modified titanium dioxide particles are coated by the coating, and the modified titanium dioxide particles cannot come into contact with organic matter such as mold, and cannot play a good antibacterial and mildew-proof effect. If the modified titanium dioxide is directly applied to the surface of the plate, the modified titanium dioxide particles cannot be firmly combined with the plate, and the modified titanium dioxide particles are easy to fall off during the use of the plate, so that the plate does not have a long-term antibacterial and mildew-proof function. Summary of the invention

[0004] In order to overcome the problems existing in the related art, the present disclosure provides a method for manufacturing an antibacterial and mildew-proof board and an antibacterial and mildew-proof board.

[0005] According to a first aspect of the present disclosure, a method for manufacturing an antibacterial and mildew-proof board is provided, and the method for manufacturing the antibacterial and mildew-proof board comprises:

[0006] Applying at least one layer of primer on the surface of the substrate, and performing a first curing treatment on the primer to form a primer layer covering the surface of the substrate;

[0007] Applying at least one layer of topcoat on the surface of the primer layer;

[0008] When a layer of the topcoat away from the substrate is in liquid state, spraying a nano-scale modified titanium dioxide emulsion on the surface of the liquid topcoat;

[0009] The liquid topcoat is subjected to a second curing treatment, so that the at least one layer of topcoat forms a topcoat layer, and the nano-scale modified titanium dioxide emulsion forms an antibacterial layer, thereby obtaining the antibacterial and mildew-proof board.

[0010] In some embodiments of the present disclosure, the droplet diameter of the nano-scale modified titanium dioxide emulsion distributed on the surface of the liquid topcoat is less than or equal to 10 μm.

[0011] In some embodiments of the present disclosure, in the nano-modified titanium dioxide emulsion, the effective concentration of the nano-modified titanium dioxide is 0.8 wt %-2.0 wt %.

[0012] In some embodiments of the present disclosure, the nanoscale modified titanium dioxide includes one or more of nanoscale iron-doped titanium dioxide, nanoscale nitrogen-doped titanium dioxide, nanoscale carbon-doped titanium dioxide, nanoscale sulfur-doped titanium dioxide, and nanoscale fluorine-doped titanium dioxide.

[0013] In some embodiments of the present disclosure, a layer of the liquid topcoat away from the substrate has a thickness of 28 μm-32 μm.

[0014] In some embodiments of the present disclosure, the topcoat includes the following components: photoactive prepolymer: 30wt%-50wt%; active diluent: 40wt%-60wt%; photoinitiator: 1wt%-5wt%; auxiliary agent: 0.2wt%-1.0wt%.

[0015] In some embodiments of the present disclosure, before performing the second curing process, the manufacturing method further includes:

[0016] The liquid topcoat sprayed with the nano-scale modified titanium dioxide emulsion is subjected to a leveling process.

[0017] In some embodiments of the present disclosure, before applying the primer to the substrate, the manufacturing method further includes:

[0018] The substrate is sequentially subjected to sanding treatment and dust removal treatment.

[0019] In some embodiments of the present disclosure, the substrate includes one or more of solid wood board, medium-density fiberboard, particle board, multilayer board, bamboo board, veneer board, wood fiber board, and straw board.

[0020] According to a second aspect of the present disclosure, an antibacterial and mildew-proof board is provided, which is manufactured by the manufacturing method of the antibacterial and mildew-proof board provided by the first aspect of the present disclosure.

[0021] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: when the outermost layer of the substrate is in liquid state, the nano-scale modified titanium dioxide emulsion is sprayed on the liquid topcoat, so that after the liquid topcoat is cured, the nano-scale modified titanium dioxide particles can be firmly loaded on the surface of the plate. At the same time, the nano-scale modified titanium dioxide particles will not be coated by the topcoat and can directly contact with harmful organic matter to play an antibacterial and mildew-proof role. Therefore, the antibacterial and mildew-proof plate produced has a good and long-lasting antibacterial and mildew-proof effect.

[0022] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0024] Figure 1 The present invention is a flow chart of a method for manufacturing an antibacterial and mildew-proof board according to an exemplary embodiment.

[0025] Figure 2 The figure is a schematic structural diagram of an antibacterial and mildew-proof board according to an exemplary embodiment. DETAILED DESCRIPTION

[0026] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0027] As the living standards of residents improve, people's requirements for living environment are gradually increasing. Compared with plastic products, more and more people prefer floors and furniture made of natural boards such as solid wood and bamboo. During the use of these boards, mold is easy to grow in a humid environment, and bacteria in the air are also easy to adhere to the boards, affecting the service life of the boards and the cleanliness of the indoor environment. Therefore, before the boards leave the factory, they are usually treated with anti-mildew and anti-aging treatments.

[0028] Modified titanium dioxide can play an antibacterial and mildew-proof role under the stimulation of visible light. At present, when performing mildew-proof treatment, modified titanium dioxide is usually mixed with resins, additives and other materials to be applied as a coating on the surface of the plate. However, when the coating is cured on the surface of the plate, the modified titanium dioxide particles are coated by the coating, and the modified titanium dioxide particles cannot come into contact with organic matter such as mold, and cannot play a good antibacterial and mildew-proof effect. If the modified titanium dioxide is directly applied to the surface of the plate, the modified titanium dioxide particles cannot be firmly combined with the plate, and the modified titanium dioxide particles are easy to fall off during the use of the plate, so that the plate does not have a long-term antibacterial function.

[0029] In view of this, the present disclosure provides a method for manufacturing an antibacterial and mildew-proof sheet. During the manufacturing process of the antibacterial and mildew-proof sheet, when the outermost layer of the substrate is in a liquid state, a nano-scale modified titanium dioxide emulsion is sprayed on the liquid topcoat, so that after the liquid topcoat is cured, the nano-scale modified titanium dioxide particles can be firmly loaded on the surface of the sheet. At the same time, the nano-scale modified titanium dioxide particles will not be coated by the topcoat and can directly contact with harmful organic matter to play an antibacterial and mildew-proof role. Therefore, the antibacterial and mildew-proof sheet produced has a good and long-lasting antibacterial and mildew-proof effect.

[0030] An exemplary embodiment of the present disclosure provides a method for manufacturing an antibacterial and mildew-proof board, referring to Figure 1 As shown, Figure 1 The flowchart of a method for manufacturing an antibacterial and mildew-proof board according to an exemplary embodiment is shown. The method for manufacturing an antibacterial and mildew-proof board includes the following steps:

[0031] Step S100, coating at least one layer of primer on the surface of the substrate, and performing a first curing treatment on the primer to form a primer layer covering the surface of the substrate;

[0032] Step S200, applying at least one layer of topcoat on the surface of the primer layer;

[0033] Step S300, when the topcoat away from the substrate is in liquid state, spraying nano-scale modified titanium dioxide emulsion on the surface of the liquid topcoat;

[0034] Step S400, performing a second curing treatment on the liquid topcoat, so that at least one layer of topcoat forms a topcoat layer, and the nano-scale modified titanium dioxide emulsion forms an antibacterial layer, thereby obtaining an antibacterial and mildew-proof board.

[0035] In step S100, refer to Figure 2As shown, the substrate 10 is the main structure of the antibacterial and mildew-proof board 100. The substrate 10 can be a board with wood fibers, for example, it can include one or more of solid wood board, medium fiber board, particle board, multilayer board, bamboo board, veneer board, wood fiber board, and straw board. In some examples, the substrate 10 includes a bamboo board, which has the characteristics of uniform structure and excellent processing performance.

[0036] The primer may include components such as resin, filler, solvent, and additives. The primer can penetrate and fill the holes that may exist on the surface of the substrate 10, and seal the surface of the substrate 10 to prevent the substrate 10 from absorbing external moisture and causing deformation of the board. At the same time, it can prevent the grease contained in the substrate 10 from penetrating out and causing the subsequently applied primer and topcoat to turn yellow.

[0037] When forming the primer layer 20, the primer can be used as a raw material and applied on the surface of the substrate 10 by spraying, brushing, etc. When only one layer of primer is required to form the primer layer 20, after the primer is applied to the surface of the substrate 10, the first curing treatment is performed on the primer layer, and the cured primer forms the primer layer 20 covering the surface of the substrate 10. When multiple layers of primer are required to form the primer layer 20, refer to Figure 2 , two layers of primer are coated on the surface of the substrate 10 to form a primer layer 20. The primer close to the surface of the substrate 10 is used as the first primer layer 21, and the primer far from the surface of the substrate 10 is used as the second primer layer 22. During the production process, the primer corresponding to the first primer layer 21 should be firstly coated on the surface of the substrate 10, and the first primer layer 21 should be subjected to a first curing treatment. After the first primer layer 21 is completely cured, the primer corresponding to the second primer layer 22 is coated on the surface of the first primer layer 21 and subjected to a first curing treatment, so that the formed second primer layer 22 and the first primer layer 21 together form a primer layer 20. When the surface of the substrate 10 is coated with multiple layers of primer, the formed primer layer 20 has a certain thickness, which can play a good sealing role on the substrate 10, and can increase the thickness and hardness of the overall paint film coated on the surface of the substrate 10, reduce the amount of topcoat applied subsequently, and save production costs. It is understandable that when the primer layer 20 is formed by curing multiple layers of primers, the types and colors of primers in different layers may be the same or different, and the present disclosure is not limited thereto.

[0038] The first curing treatment is the process of converting the primer from a liquid or gelatinous state into a dry film layer, and the first curing treatment can be selected based on the type of primer applied. For example, when the type of primer includes a volatile primer, an air-drying primer, or a primer that can undergo a curing reaction at room temperature, the substrate 10 coated with the primer is placed under normal temperature conditions and waits for a certain period of time, and the solvent in the primer is evaporated by air convection, and the oxygen in the air reacts with the primer, or the various resins in the primer undergo a cross-linking reaction, which is the process of the first curing treatment. For another example, when the primer includes a thermosetting primer, the substrate 10 coated with the primer is heated at a certain temperature and for a certain period of time, and the thermosetting primer is cured and formed, which is the process of the first curing treatment. For another example, when the primer is a radiation-curing primer, a light source of a specific wavelength is used to irradiate the substrate 10 coated with the primer, so that the primer is cured and formed, which is the process of the first curing treatment.

[0039] In step S200, refer to Figure 2 After forming the primer layer 20, a topcoat is applied on the surface of the primer layer 20. The topcoat is used to decorate and protect the substrate 10. Pigments can be doped in the topcoat so that the antibacterial and mildew-proof sheet 100 after molding has a specific color, gloss and texture, and the molded antibacterial and mildew-proof sheet 100 has good hardness and aging resistance. Since the topcoat is applied to the surface of the primer layer 20, the topcoat can be well adhered to the surface of the primer layer 20. Based on actual needs, the topcoat can be applied in one or more layers. It is understandable that when applying multiple layers of topcoat, the next coating can be performed on the cured topcoat surface only after the topcoat applied in the previous time is cured, so as to ensure the reliability of the topcoat layer 30 finally formed.

[0040] In step S300, when only one layer of topcoat is applied on the surface of the primer layer 20, the topcoat is the topcoat away from the substrate 10. When multiple layers of topcoat are applied on the surface of the primer layer 20, the outermost topcoat is the topcoat away from the substrate 10. Figure 2 , Figure 2The schematic diagram of applying two topcoats is shown as an example, in which the topcoat close to the surface of the substrate 10 is used as the first topcoat layer 31, and the topcoat away from the substrate 10 is used as the second topcoat layer 32, and the first topcoat layer 31 is a solid film layer. When the second topcoat layer 32 is in a liquid state, a nano-scale modified titanium dioxide emulsion is sprayed on the liquid second topcoat layer 32, and the nano-scale modified titanium dioxide emulsion contains modified titanium dioxide particles with a nano-scale particle size, so that the diameter of the emulsion droplets 41 formed during the spraying of the nano-scale modified titanium dioxide emulsion is as small as possible. Exemplarily, the diameter of the emulsion droplets 41 of the nano-scale modified titanium dioxide emulsion distributed on the surface of the liquid second topcoat layer 32 is controlled to be less than or equal to 10μm, for example, it can be between 1μm-10μm, so that the modified titanium dioxide particles after the emulsion droplets 41 are dried can better adhere to the surface of the second topcoat layer 32. At the same time, the modified titanium dioxide particles after drying can have a larger specific surface area and can better contact with microorganisms or pathogens to exert better antibacterial and antifungal effects.

[0041] For example, the nano-modified titanium dioxide emulsion can be sprayed by various spraying methods such as ultrasonic spraying, plasma spraying, arc spraying, etc. In some examples, ultrasonic spraying can be used, and the ultrasonic nozzle can atomize the nano-modified titanium dioxide emulsion well so that the diameter of the emulsion droplets 41 of the nano-modified titanium dioxide emulsion is less than or equal to 10 μm.

[0042] For example, since the diameter of the emulsion droplets 41 of the nano-scale modified titanium dioxide emulsion formed in the second topcoat layer 32 in the liquid state is small, in order to reduce the probability of the liquid topcoat covering the emulsion droplets 41 and ensure that the liquid topcoat can fix the emulsion droplets 41 well in the subsequent curing process, the thickness of the layer of liquid topcoat away from the substrate 10 is controlled to be between 28μm-32μm, that is, when the second topcoat layer 32 is in the liquid state, the thickness is between 28μm-32μm. In some examples, the thickness of the layer of liquid topcoat away from the substrate 10 is between 29μm-30μm.

[0043] In step S400, after the nano-modified titanium dioxide emulsion is sprayed, a layer of liquid topcoat away from the substrate 10 is subjected to a second curing treatment, referring to Figure 2As shown, the second curing treatment is performed on the topcoat corresponding to the second topcoat layer 32, so that the cured second topcoat layer 32 and the first topcoat layer 31 form a topcoat layer 30 together. The second curing treatment is the process of converting the topcoat from a liquid or gel state to a dry film layer, and the second curing treatment can be selected based on the type of topcoat applied. Since the surface of the liquid second topcoat layer 32 is doped with emulsion droplets 41 of nano-scale modified titanium dioxide emulsion, the second curing treatment can adopt a short time and simple operation process, so that the emulsion droplets 41 can be well attached to the surface of the second topcoat layer 32, and avoid the emulsion droplets 41 staying too long and being covered by the topcoat in the second topcoat layer 32. For example, a light-curing topcoat can be used as the forming material of the second topcoat layer 32. In the process of performing the second curing treatment on the second topcoat layer 32, ultraviolet light, near-infrared light or infrared light can be used to irradiate the second topcoat layer 32, so that the second topcoat layer 32 can be cured and formed within a few seconds.

[0044] Before the second topcoat layer 32 is cured and formed, the emulsion droplets 41 are attached to the surface of the liquid topcoat in the form of droplets or particles. During the second curing process, the resin material in the liquid topcoat undergoes a polymerization reaction to form a three-dimensional cross-linked structure, and the topcoat quickly changes from a liquid state to a solid state. At the same time, since the diameter of the emulsion droplets 41 is very small, the water in the emulsion droplets 41 evaporates very quickly, and the emulsion droplets 41 dry quickly to form nano-scale modified titanium dioxide particles. Therefore, during the curing process of the topcoat, the solid topcoat surrounds the nano-scale modified titanium dioxide particles, so that the nano-scale modified titanium dioxide particles can be embedded in the surface of the cured second topcoat layer 32, and a plurality of dried nano-scale modified titanium dioxide emulsion droplets 41 form an antibacterial layer 40.

[0045] Since the antibacterial layer 40 includes a plurality of nano-scale modified titanium dioxide particles firmly bonded to the topcoat layer 30, and the nano-scale modified titanium dioxide particles are not covered by the topcoat layer 30, the nano-scale modified titanium dioxide particles can directly contact with external microorganisms and pathogens, so that the antibacterial layer 40 can play a good antibacterial and mildew-proof effect. At the same time, since the particle size of the nano-scale modified titanium dioxide particles is small, the antibacterial layer 40 formed will not affect the appearance or touch of the exterior surface of the antibacterial and mildew-proof sheet 100, and the nano-scale modified titanium dioxide particles have a large contact area with harmful substances, which can further enhance the sterilization effect of the antibacterial layer 40, so that the obtained antibacterial and mildew-proof sheet 100 has a good and long-lasting antibacterial and mildew-proof effect, and enhances the user experience.

[0046] In some examples, in addition to the nano-modified titanium dioxide, the nano-modified titanium dioxide emulsion may also include additives such as solvents and leveling agents, and the solvent may be deionized water. Since the emulsion droplets 41 distributed on the surface of the second topcoat layer 32 need to be less than or equal to 10 μm, the concentration and viscosity of the nano-modified titanium dioxide emulsion need to be controlled. If the viscosity or the concentration of the active ingredient is too high, the nozzle is easily blocked during the spraying process, resulting in the diameter of the formed emulsion droplets 41 being too large. At the same time, if the concentration of the active ingredient is too low, the modified titanium dioxide particles in the emulsion droplets 41 attached to the surface of the second topcoat layer 32 have limited antibacterial and mildew-proof effects. Therefore, the effective concentration of the nano-modified titanium dioxide can be controlled to be between 0.8wt% and 2.0wt%. In some examples, the effective concentration of the nano-modified titanium dioxide is between 0.9wt% and 1.5wt%. In some examples, the effective concentration of the nano-modified titanium dioxide is between 0.9wt% and 1.1wt%.

[0047] Titanium dioxide is an N-type semiconductor. When titanium dioxide is irradiated by light (ultraviolet light) with a wavelength less than or equal to 387.5 nm, the electrons in the valence band can obtain the energy of photons and jump to the conduction band, forming photogenerated electrons (e - ), and photogenerated holes (h + ). It should be noted that the energy range between the valence band and the conduction band is the band gap, and the minimum energy required for the bound electrons to transition to the conduction band is the band gap width. - Easily captured by oxidative substances to generate superoxide free radicals 2 - , and the photogenerated holes h + It can oxidize organic matter adsorbed on the surface of titanium dioxide to form hydroxyl radicals ·OH. Superoxide radicals ·O 2 - The hydroxyl radical OH has a very strong oxidizing property and can break the chemical bonds of almost all organic substances. Therefore, it can oxidize most organic substances and inorganic pollutants and react to form harmless inorganic small molecules, carbon dioxide and water.

[0048] Since titanium dioxide has a very small absorption range for the spectrum, only in the ultraviolet part, and the photogenerated electrons e - and photogenerated holes h +It is easy to compound to generate heat energy. Therefore, the photocatalytic activity of unmodified titanium dioxide is low, and the antibacterial and mildew-proof effect it can play is limited. Therefore, the present application adopts nano-scale modified titanium dioxide as the forming material of the antibacterial layer. For example, the nano-scale modified titanium dioxide can include one or more of nano-scale iron-doped titanium dioxide, nano-scale nitrogen-doped titanium dioxide, nano-scale carbon-doped titanium dioxide, nano-scale sulfur-doped titanium dioxide, and nano-scale fluorine-doped titanium dioxide. Titanium dioxide is doped and modified by iron ions, nitrogen ions, carbon ions, sulfur ions, fluorine ions, etc. The doped ions can enter the lattice of titanium dioxide and replace the titanium atoms or oxygen atoms in titanium dioxide, thereby forming a new energy level between the valence band and the conduction band of titanium dioxide, so that the band gap width is narrowed, so that the nano-scale modified titanium dioxide has a higher photocatalytic activity. The absorption range of titanium dioxide for the spectrum is extended from ultraviolet light to the visible light range. Nano-scale modified titanium dioxide can catalyze reactions in environments such as sunlight and indoor lighting, thereby improving the antibacterial and mildew-proof effects. In addition, iron-doped titanium dioxide can cause lattice defects in titanium dioxide, slowing down the photogenerated electrons e - and photogenerated holes h + The composite can enhance the photocatalytic activity.

[0049] In some possible embodiments, when the topcoat includes a photocurable topcoat, the topcoat may include the following components: photoactive prepolymer: 30wt%-50wt%; reactive diluent: 40wt%-60wt%; photoinitiator: 1wt%-5wt%; auxiliary agent: 0.2wt%-1.0wt%. Among them, the photoactive prepolymer is the main material of the photocurable topcoat, which has a group that can undergo a photocuring reaction, such as an unsaturated double bond, an epoxy group, etc. The photoactive prepolymer may include, for example, but is not limited to, epoxy acrylate, polyurethane acrylic resin, polyester acrylic resin, amino acrylic resin, etc.

[0050] Since the viscosity of the photoactive prepolymer is high, the viscosity of the formed topcoat is high, which affects the coating. Therefore, the reactive diluent can reduce the viscosity of the topcoat, which is beneficial to the coating. At the same time, it can also adjust the photocuring rate of the topcoat and adjust the hardness, flexibility, adhesion and other properties of the cured topcoat. The reactive diluent has unsaturated double bonds, epoxy groups and other groups, which can participate in the photocuring reaction. The reactive diluent can include but is not limited to acrylate diluents, vinyl diluents, vinyl ether diluents and epoxy diluents.

[0051] Photoinitiators can absorb light radiation energy and undergo chemical changes, producing active intermediates (free radicals or cations) that can initiate polymerization, thereby initiating polymerization, cross-linking and grafting reactions, so that the photocurable topcoat can be converted from liquid to solid within seconds, thereby forming a topcoat layer. It should be noted that the absorption spectrum of the photoinitiator needs to match the emission spectrum of the light source, that is, the photoinitiator needs to be selected based on the emission spectrum of the light source, and an initiator with a greater absorption of the light source spectrum is selected. For example, when the light source emission spectrum is ultraviolet rays (UV), the topcoat is a UV type topcoat, and the photoinitiator may include but is not limited to 2,4,6 (trimethylbenzoyl) diphenylphosphine oxide, 2,4,6-trimethylbenzoylphosphonic acid ethyl ester, 1-hydroxy-cyclohexyl-phenyl ketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, benzoin dimethyl ether, methyl o-benzoylbenzoate, benzophenone, 4-chlorobenzophenone, bis-2,6-difluoro-3-pyrrolphenyl titanocene, and one or more of 4-dimethylamino-ethyl benzoate.

[0052] The additives may include one or more of stabilizers, leveling agents, defoamers, plasticizers, coupling agents, pigments, etc. The additives may improve the coating performance or stability of the topcoat, or make the formed topcoat layer have a specific color and gloss. The type of additives may be selected based on demand, and the present disclosure does not limit this.

[0053] In an exemplary embodiment, before the second curing treatment is performed on a layer of liquid topcoat away from the substrate, that is, before step S400 in the above embodiment of the present disclosure, the method for manufacturing the antibacterial and mildew-proof board further includes:

[0054] The liquid topcoat sprayed with nano-modified titanium dioxide emulsion is subjected to a leveling process.

[0055] refer to Figure 2As shown, since a layer of liquid topcoat, i.e., the second topcoat layer 32, which is far away from the substrate, serves as the exterior surface of the antibacterial and mildew-proof sheet 100, before the second topcoat layer 32 is cured, the liquid second topcoat layer 32 sprayed with nano-modified titanium dioxide emulsion is subjected to a leveling process. The leveling process is to run the liquid second topcoat layer 32 sprayed with nano-modified titanium dioxide emulsion in a closed tunnel with a certain air flow rate for a certain period of time. During the leveling process, part of the solvent in the liquid second topcoat layer 32 and the solvent in the nano-modified titanium dioxide emulsion evaporate, and the volume of the liquid topcoat shrinks so that the modified titanium dioxide particles are embedded therein. At the same time, under the surface tension of the liquid topcoat, the liquid topcoat forms a flat and smooth surface. In this way, after the second curing treatment, the cured second topcoat layer 32 and the topcoat layer 30 formed by the first topcoat layer 31 can play a good protective and decorative role, ensuring that the formed antibacterial and mildew-proof sheet 100 has a flat surface, good gloss and texture.

[0056] In an exemplary embodiment, before applying the primer to the substrate, that is, before step S100 in the above embodiment of the present disclosure, the method for manufacturing the antibacterial and mildew-proof board further includes:

[0057] The substrate is sanded and dusted in sequence.

[0058] refer to Figure 2 When the substrate 10 is cut or combined from wood raw materials, there may be some processing marks, burrs, stains, etc. on the surface of the substrate 10 that have adverse effects on the appearance of the antibacterial and mildew-proof board 100. Therefore, before the primer layer 20 is formed on the surface of the substrate 10, the substrate 10 is sanded to make it have a smooth surface, which can also be beneficial to the adhesion of the primer layer 20 and the surface flatness of the primer layer 20. Sanding treatment is to use a sanding belt to grind the surface of the substrate 10 so that the surface of the substrate 10 is more delicate. The particles on the sanding belt can be selected based on actual needs. For example, a sanding belt with particles from large to small can be used to grind the surface of the substrate 10 to achieve coarse grinding, fine grinding and fine grinding of sanding treatment. Since there is a lot of dust on the surface of the substrate 10 after sanding treatment, the dust is easy to affect the primer layer 20 formed subsequently. The substrate 10 is dusted. For example, a dust removal machine can be used to remove the dust on the surface of the substrate 10 to form a substrate 10 with a smooth and clean surface.

[0059] An exemplary embodiment of the present disclosure also provides an antibacterial and mildew-proof plate, referring to Figure 2As shown, the antibacterial and mildew-proof sheet 100 can be made by the manufacturing method of the antibacterial and mildew-proof sheet provided by the above embodiment. The antibacterial and mildew-proof sheet 100 can be used as a decorative board, a home floor or a furniture material. The antibacterial and mildew-proof sheet 100 formed by the above manufacturing method, because in the antibacterial and mildew-proof sheet 100, the nano-scale modified titanium dioxide particles in the antibacterial layer 40 are embedded in the surface of the topcoat layer 30, it can be firmly combined with the topcoat layer 30, and it is not easy to fall off or fall off. At the same time, the nano-scale modified titanium dioxide particles will not be coated by the topcoat layer 30, the nano-scale modified titanium dioxide particles can be in direct contact with harmful substances, and the contactable surface area is large, and the nano-scale modified titanium dioxide particles can be catalyzed and triggered in a visible light environment, so that the antibacterial layer 40 on the surface of the antibacterial and mildew-proof sheet 100 has a good antibacterial and mildew-proof effect. The antibacterial and mildew-proof sheet 100 can eliminate harmful substances such as microbial pathogens in the environment, can play a good and long-lasting antibacterial and mildew-proof effect, and enhance the user experience.

[0060] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed in this disclosure. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0061] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A method for making an antibacterial and mildew-proof board, characterized in that: The method for making the antibacterial and mildew-proof plate comprises: Applying at least one layer of primer on the surface of the substrate, and performing a first curing treatment on the primer to form a primer layer covering the surface of the substrate; Applying at least one layer of topcoat on the surface of the primer layer; When a layer of the topcoat away from the substrate is in liquid state, spraying a nano-scale modified titanium dioxide emulsion on the surface of the liquid topcoat; The liquid topcoat is subjected to a second curing treatment, so that the at least one layer of topcoat forms a topcoat layer, and the nano-scale modified titanium dioxide emulsion forms an antibacterial layer, thereby obtaining the antibacterial and mildew-proof board.

2. The method for making the antibacterial and mildew-proof sheet according to claim 1, characterized in that: The droplet diameter of the nano-scale modified titanium dioxide emulsion distributed on the surface of the liquid topcoat is less than or equal to 10 μm.

3. The method for making the antibacterial and mildew-proof sheet according to claim 2, characterized in that: In the nano-scale modified titanium dioxide emulsion, the effective concentration of the nano-scale modified titanium dioxide is 0.8 wt % to 2.0 wt %.

4. The method for making the antibacterial and mildew-proof sheet according to claim 3, characterized in that: The nano-scale modified titanium dioxide includes one or more of nano-scale iron-doped titanium dioxide, nano-scale nitrogen-doped titanium dioxide, nano-scale carbon-doped titanium dioxide, nano-scale sulfur-doped titanium dioxide, and nano-scale fluorine-doped titanium dioxide.

5. The method for making the antibacterial and mildew-proof sheet according to claim 1, characterized in that: The thickness of the layer of the liquid topcoat away from the substrate is 28 μm-32 μm.

6. The method for making the antibacterial and mildew-proof sheet according to claim 1, characterized in that: The topcoat comprises the following components: photoactive prepolymer: 30wt%-50wt%; active diluent: 40wt%-60wt%; photoinitiator: 1wt%-5wt%; Additives: 0.2wt%-1.0wt%.

7. The method for making the antibacterial and mildew-proof sheet according to claim 1, characterized in that: Before performing the second curing process, the manufacturing method further includes: The liquid topcoat sprayed with the nano-scale modified titanium dioxide emulsion is subjected to a leveling process.

8. The method for making the antibacterial and mildew-proof board according to claim 1, characterized in that: Before applying the primer to the substrate, the production method further comprises: The substrate is sequentially subjected to sanding treatment and dust removal treatment.

9. The method for producing the antibacterial and mildew-proof board according to any one of claims 1 to 8, characterized in that: The substrate includes one or more of solid wood board, medium fiberboard, particle board, multilayer board, bamboo board, veneer board, wood fiber board and straw board.

10. An antibacterial and mildew-proof board, characterized in that: The antibacterial and mildew-proof board is manufactured by the manufacturing method of any one of claims 1 to 9.

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