Silica sol mildew preventive, display equipment and silica sol layer spraying method

Abstract

The invention provides a silica sol mildewproof agent, display equipment and a spraying method of a silica sol layer, and the silica sol mildewproof agent comprises the following components in percentage by weight: 5%-10% of silicon dioxide, 0.1%-1% of a silane coupling agent, 73%-90% of a diluent, 5%-15% of an organosilicon compound and 0.1%-1% of an antistatic agent; wherein the silicon dioxide is silicon dioxide particles, and the particle size of the silicon dioxide particles is not smaller than 10 nanometers and not larger than 100 nanometers. The silica sol mildew inhibitor provided by the invention can solve the technical problem of low mildew-proof precision of the existing mildew inhibitor.

Description

Technical Field

[0001] The present application relates to the technical field of mildew prevention of display devices, and in particular to a silica sol mildew preventer, a display device and a method for spraying a silica sol layer. Background Art

[0002] Existing display devices (such as smart interactive tablets) mainly include LCM modules (LCD Module, LCD display module, liquid crystal module), liquid crystal screens installed on the LCM modules and soda-lime protective glass covering the liquid crystal screens. The bonding and installation methods between the soda-lime protective glass and the liquid crystal screens mainly include frame bonding, zero bonding and full bonding. Among them, zero bonding is widely used because of its high yield, good display effect and low cost.

[0003] However, when the soda-lime protective glass LCD screen is zero-bonded, the gap between the soda-lime protective glass LCD screen is small, and the water vapor in the gap is not easy to dissipate, and then reacts with the sodium ions in the soda-lime protective glass, resulting in watermarks and mold on the inner surface of the soda-lime protective glass.

[0004] However, the watermarks and mold on the inner surface of the soda-lime protective glass are usually very small, and the existing mildew-proofing agents have low mildew-proofing accuracy and can only be used to prevent watermarks and mold on the outer surface of the display device. The mildew-proofing effect on the inner surface of the soda-lime protective glass is poor. Summary of the invention

[0005] The embodiment of the present application provides a silica sol mildew inhibitor to solve the technical problem of low mildew inhibitor precision of the existing mildew inhibitor.

[0006] To achieve the above-mentioned purpose, the silica sol mildew preventive proposed in the present application comprises 5% to 10% of silicon dioxide, 0.1% to 1% of silane coupling agent, 73% to 90% of diluent, 5% to 15% of organosilicon compound and 0.1% to 1% of antistatic agent by weight percentage; wherein the silicon dioxide is silicon dioxide particles, and the particle size of the silicon dioxide particles is not less than 10 nanometers and not more than 100 nanometers;

[0007] Optionally, in one embodiment, the silicon dioxide is irregularly shaped silicon dioxide particles.

[0008] Optionally, in one embodiment, in the silicon dioxide, 85% to 95% of the silicon dioxide particles have a particle size of not less than 28 nanometers and not more than 32 nanometers.

[0009] Optionally, in one embodiment, the diluent is one or more of acetone, methyl ethyl ketone, cyclohexanone, benzene, toluene, xylene, n-butanol, and styrene; the silane coupling agent includes any one or more of vinyl triethoxysilane, vinyl trimethoxysilane, and vinyl triacetoxysilane; the organosilicon compound includes any one or more of bioactive organosilicon, silicone oil, silicone rubber, and silicone resin.

[0010] Optionally, in one embodiment, the antistatic agent is a fluorine-free antistatic agent.

[0011] The present application also proposes a display device, which includes a display module and a protective glass. A display screen is mounted on the display module. The protective glass covers the display screen and is spaced apart from the display screen. The protective glass has an inner surface facing the display screen. The inner surface is coated with a silica sol layer. The silica sol layer is sprayed with the silica sol mildew inhibitor described in any of the above embodiments.

[0012] Optionally, in one embodiment, the thickness of the silica sol layer is not less than 30 nanometers and not more than 100 micrometers.

[0013] Optionally, in one embodiment, light-shielding ink is further provided on the inner surface of the protective glass, and the silica sol layer covers the light-shielding ink.

[0014] Optionally, in one embodiment, pits or convex patterns are further formed on the inner surface, and the silica sol coating completely covers the pits or the convex patterns.

[0015] Optionally, in one embodiment, the protective glass is further provided with an outer surface opposite to the inner surface, and a processing layer is provided on the outer surface, and the processing layer includes any one or more of an anti-fingerprint processing layer, an anti-reflection and anti-transmittance processing layer, and an anti-glare processing layer.

[0016] The present application also proposes a method for spraying a silica sol layer, which comprises preparing a glass to be processed and the silica sol mildew inhibitor described in any of the above embodiments, and then spraying the silica sol mildew inhibitor onto the surface of the glass to be processed by a thermal spraying process. The thermal spraying parameters include: a nozzle diameter of 0.3±0.06 mm, a nozzle speed of 0.1±0.02 m / min, a nozzle atomization pressure of 0.2±0.04 MPa, a distance between the nozzle and the glass to be processed of 100±20 mm, a flow rate of the silica sol mildew inhibitor of 30±6 g / min, a fan pressure of the silica sol mildew inhibitor of 0.3±0.06 MPa, and a thermal spraying temperature of 85±5°C.

[0017] The silica sol mildew preventer provided by the present application comprises 5-10% silicon dioxide, 0.1%-1% silane coupling agent, 73%-90% diluent, 5%-15% organosilicon compound and 0.1%-1% antistatic agent by weight percentage, and the silicon dioxide is silicon dioxide particles, and the particle size of the silicon dioxide particles is not less than 10 nanometers and not more than 100 nanometers. Through the overall coordination of the above components, the weight percentage of each component and the particle size range of nano silicon dioxide, the coating formed by the silica sol mildew preventer of the present application can have high light transmittance, strong adhesion, good moisture resistance and high mildew prevention precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of a display device of the present application;

[0020] Figure 2 It is a structural schematic diagram of another embodiment of the display device of the present application.

[0021] Explanation of the accompanying drawings: 100, display device; 10, display module; 11, display screen; 20, protective glass; 21, inner surface; 211, pits; 212, convex patterns; 22, outer surface; 30, silica sol layer; 40, light-shielding ink; 50, gap; 60, treatment layer.

[0022] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0024] The embodiment of the present application provides a silica sol mildew inhibitor to solve the problem that the soda-lime protective glass in the existing display device is prone to watermarks and mildew, which will be described below with reference to the accompanying drawings.

[0025] In the embodiment of the present application, the silica sol mildew preventive comprises 5% to 10% silicon dioxide, 0.1% to 1% silane coupling agent, 5% to 15% organosilicon compound, 73% to 90% diluent and 0.1% to 1% antistatic agent by weight percentage. The silicon dioxide is irregularly shaped silicon dioxide particles, and the particle size of the silicon dioxide particles is not less than 10 nanometers and not more than 100 nanometers.

[0026] Specifically, the silica is nano-scale silica, which has the appearance of an amorphous white powder, and the microstructure is spherical and has a flocculent and mesh quasi-particle structure. Because it is ultrafine nano-scale, silica has a small size effect, a surface effect, and a macroscopic quantum tunneling effect, and thus has many unique properties, such as good dispersibility, high transparency, high stability, etc., which can greatly improve the strength of the coating. In the silica sol mildew inhibitor of the present application, the weight percentage of silica is 5% to 10%, specifically 5%, 6%, 7%, 8%, 8.5%, 9%, 10%, etc., and the silica is irregularly shaped silica particles, and the particle size of the silica particles is not less than 10 nanometers and not more than 100 nanometers. It can be understood that compared with regular-shaped silica particles, irregular-shaped silica particles are not easy to agglomerate on a large scale when mixed with diluents and other components, thereby avoiding the formation of moire patterns due to the formed coating being too flat, and avoiding affecting the performance of silica. It is also understood that if the particle size of the silica particles is less than 10 nanometers, it will be difficult to mass produce silica and the cost will be high, and if the particle size of the silica particles is greater than 100 nanometers, it will lead to problems such as large surface roughness and poor self-compactness of the formed coating. Therefore, by making the particle size of the silica particles not less than 10 nanometers and not more than 100 nanometers, not only can silica be easily mass produced and the cost is low, but also it can ensure that the silica has the best performance in terms of good dispersibility, high transparency, high stability and the like.

[0027] Silane coupling agent is an auxiliary agent, which has excellent properties such as heat resistance, weather resistance, adhesion, low surface tension and physiological inertness. It can be used for modification of organic polymers and their composite materials, surface modification of inorganic materials, and plays the role of coupling, adhesion promotion, surface protection, and change of surface activity. In particular, silane coupling agent can improve the adhesion, moisture resistance and corrosion resistance of the coating, and solve the problem that some materials have long been unable to bond. Therefore, by adding 0.1% to 1% by weight of silane coupling agent to the silica sol mildew inhibitor of the present application, the adhesion and moisture resistance of the silica sol mildew inhibitor can be improved, so that the silica sol layer 30 (see Figure 1 ) can be firmly attached to the surface of the soda-lime protective glass 20 and prevent the sodium ions in the soda-lime protective glass 20 from reacting with water vapor in the air, thereby preventing watermarks and mold from forming on the soda-lime protective glass 20.

[0028] The specific weight percentage of the silane coupling agent can be 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.55%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, etc. In addition, there are many existing silane coupling agents. When preparing the silica sol mildew inhibitor of the present application, one or more silane coupling agents can be added. For example, optionally, in one embodiment, the silane coupling agent includes any one or more of vinyl triethoxy silane, vinyl trimethoxy silane, and vinyl triacetoxy silane.

[0029] Organic silicon compounds refer to compounds containing Si-C bonds and at least one organic group directly connected to silicon atoms. Due to the unique structure of organic silicon compounds, they have the properties of both inorganic and organic materials, as well as basic properties such as low surface tension, small viscosity-temperature coefficient, and high compressibility. They also have excellent properties such as high and low temperature resistance, electrical insulation, oxidation stability, weather resistance, flame retardancy, hydrophobicity, corrosion resistance, non-toxicity, tastelessness, and physiological inertness. Therefore, by adding 5% to 15% by weight of organic silicon compounds to the silica sol mildew inhibitor of the present application, the silica sol layer 30 can be made resistant to high and low temperatures, electrical insulation, oxidation stability, corrosion resistance, etc., and the stability of the silica sol layer 30 is ensured.

[0030] Among them, the weight percentage of the organosilicon compound in the silica sol mildew inhibitor can be 5%, 6%, 7%, 7.5%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, etc. It should be noted here that the silane coupling agent is also a kind of organosilicon compound. When preparing the silica sol mildew inhibitor of the present application, 5% to 15% of the organosilicon compound is other organosilicon compounds except the silane coupling agent, so as to avoid affecting the weight percentage of the silane coupling agent. Similarly, there are many existing organosilicon compounds. When preparing the silica sol mildew inhibitor of the present application, one or more organosilicon compounds can be added. For example, optionally, in one embodiment, the organosilicon compound includes any one or more of bioactive organosilicon, silicone oil, silicone rubber, and silicone resin.

[0031] The diluent is a colorless transparent liquid. The diluent can dissolve other components in the silica sol mildew preventer so that the components can be fully mixed, and the diluent is also used to adjust the viscosity of the silica sol mildew preventer. The silica sol mildew preventer of the present application has a weight percentage of 73% to 90% diluent, and the specific weight percentage can be 73%, 75%, 78%, 80%, 82%, 84%, 86%, 88%, 90%, etc. according to actual conditions. And in the first embodiment of the present application, the diluent is one or more of acetone, methyl ethyl ketone, cyclohexanone, benzene, toluene, xylene, n-butanol, and styrene.

[0032] Antistatic agent is an additive added to plastic or coated on the surface of molded products to reduce static electricity accumulation. Because the silica sol mildew preventer of the present application is used in the display device 100, the display device 100 is an electrical device. If the silica sol layer 30 mildew preventer coated on the soda-lime protective glass 20 accumulates static electricity, it is easy to cause leakage or short circuit and affect the use of the display device 100. Therefore, the silica sol mildew preventer of the present application also includes an antistatic agent with a weight percentage of 0.1% to 1% to prevent the formed silica sol layer 30 from accumulating static electricity.

[0033] Among them, the specific weight percentage of the antistatic agent can be 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.55%, 0.6%, 0.7%, 0.8%, 0.9%, 1% and the like, and the specific type of the antistatic agent can be any one of a cationic antistatic agent, an anionic antistatic agent and a nonionic antistatic agent.

[0034] It should be noted that, in terms of antistatic effect, the effect of fluorine-containing antistatic agents is better, but because fluorine is a halogen element, it is easy to react with the alkali metal (i.e., sodium ions) in the soda-lime protective glass 20, which may promote the generation of watermarks and mold problems. Therefore, in one embodiment of the present application, the antistatic agent is a fluorine-free antistatic agent to avoid the situation where the antistatic agent in the silica sol anti-mold agent promotes glass watermarks and mold problems.

[0035] In summary, it can be understood that the silica sol mildew preventer provided by the present application includes 5-10% silicon dioxide, 0.1%-1% silane coupling agent, 73%-90% diluent, 5%-15% organosilicon compound and 0.1%-1% antistatic agent by weight percentage, and the silicon dioxide is irregularly shaped silicon dioxide particles, and the particle size of the silicon dioxide particles is not less than 10 nanometers and not more than 100 nanometers. Furthermore, after the silica sol mildew preventer of the present application is applied to the surface of the soda-lime protective glass 20, it can form a coating with high light transmittance, strong adhesion and good moisture resistance, so that it can be firmly attached to the surface of the soda-lime protective glass 20 without affecting the display effect of the display device 100, avoiding the situation where the calcium ions in the soda-lime protective glass 20 react with the water vapor in the air to produce watermarks and mold.

[0036] Optionally, in one embodiment, in the silicon dioxide, 85% to 95% of the silicon dioxide particles have a particle size of not less than 28 nanometers and not more than 32 nanometers, for example, the average particle size of 90% of the silicon dioxide particles may be 30 nanometers (i.e., D90 is 30nm). When the particle size of 85% to 95% of the silicon dioxide particles is within the range of 28 nanometers to 32 nanometers, the dispersibility, uniformity, stability and cost of the silicon dioxide can achieve better results, and the precision of the silica sol layer 30 formed on the soda-lime protective glass 20 is also higher, thereby achieving higher light transmittance and stability.

[0037] It should be noted that, unlike the existing mildew-proofing agents mainly used for the outer surface of the display device 100, the silica sol mildew-proofing agent of the present application is originally designed to be used for the surface of the soda-lime protective glass 20 located inside the display device 100 (i.e. Figure 1 The inner surface 21), therefore, the particle size of silicon dioxide in the silica sol mildew inhibitor of the present application is set between 10 nanometers and 100 nanometers, and 90% of the particle size is between 28 nanometers and 32 nanometers to achieve higher mildew prevention accuracy.

[0038] like Figure 1 As shown, the present application also proposes a display device 100, which includes a display module 10 and a protective glass 20, wherein the display module 10 is an LCM display module 10 and is installed with a display screen 11, and the display screen 11 is a liquid crystal display screen 11, and the protective glass 20 is installed on the display screen 11 in a zero-fitting manner, at which time the protective glass 20 covers the display screen 11 and is spaced from the display screen 11. In addition, the protective glass 20 also has an inner surface 21 facing the display screen 11, and the inner surface 21 is coated with a silica sol layer 30, and the silica sol layer 30 is sprayed by the silica sol mildew inhibitor of any of the above embodiments. It can be understood that, because when the protective glass 20 is installed on the display screen 11 in a zero-fit installation manner, there is a certain gap 50 between the protective glass 20 and the display screen 11, and the gap 50 is small, so that the water vapor in the gap 50 is not easy to be discharged or lost, and then the water vapor in the gap 50 is easy to react with the sodium ions in the protective glass 20, thereby generating watermarks and mold on the inner surface 21 of the protective glass 20. Therefore, by coating the silica sol mildew inhibitor of any of the above embodiments on the inner surface 21 of the protective glass 20 to form a silica sol layer 30, water vapor and the protective glass 20 can be effectively blocked to avoid watermarks and mold, and the display effect of the display device 100 will not be affected.

[0039] It can be understood that the thicker the silica sol layer 30 is, the better the mildew-proof effect is, but the light-transmitting effect is also worse; on the contrary, the thinner the silica sol layer 30 is, the better the light-transmitting effect is, but the mildew-proof effect is also worse. Therefore, in order to take into account both the mildew-proof effect and the light-transmitting effect, in one embodiment, the thickness of the silica sol layer 30 is not less than 30 nanometers and not more than 100 micrometers, so that the light transmittance range of the silica sol layer 30 can be guaranteed to be between 80% and 99.5% while ensuring sufficient mildew-proof effect, thereby ensuring the light-transmitting effect.

[0040] Optionally, in one embodiment, as Figure 1 As shown, a light-shielding ink 40 is also provided on the inner surface 21 of the protective glass 20. The light-shielding ink 40 extends along the periphery of the inner surface 21 and is in a ring shape. For example, when the inner surface 21 of the protective glass 20 is a rectangle, the light-shielding ink 40 is in a square ring shape, which can better prevent the display device 100 from leaking light. However, the light-shielding ink 40 is generally made of organic material, and the protective glass 20 is generally made of inorganic material. The adhesion between organic material and inorganic material is generally weak, and the light-shielding ink 40 is easy to fall off from the protective glass 20 during use. Therefore, in this embodiment, the silica sol layer 30 covers the light-shielding ink 40, and then with the strong adhesion of the silica sol layer 30 on the protective glass 20, the risk of the light-shielding ink 40 falling off can be reduced, and the bonding stability of the light-shielding ink 40 on the protective glass 20 can be improved.

[0041] Optionally, in one embodiment, as Figure 2 As shown, pits 211 or convex patterns 212 are also formed on the inner surface 21, and the silica sol coating completely covers the pits 211 or the convex patterns 212. It can be understood that during the processing of the protective glass 20, due to factors such as insufficient process precision, cold and hot deformation, stress deformation, and debris extrusion, the surface of the protective glass 20 will inevitably form small defects such as pits 211 or convex patterns 212, thereby affecting the yield rate of the protective glass 20. Therefore, in this embodiment, by making the silica sol layer 30 completely cover the pits 211 or convex patterns 212 on the inner surface 21, the surface flatness of the protective glass 20 can be improved, thereby improving the yield rate.

[0042] Optionally, in one embodiment, as Figure 2 As shown, the protective glass 20 is also provided with an outer surface 22 opposite to the inner surface 21, and a processing layer 60 is provided on the outer surface 22, and the processing layer 60 includes any one or more layers of an anti-fingerprint processing layer 60, an anti-reflection and anti-reflection processing layer 60, and an anti-glare processing layer 60.

[0043] Among them, the anti-fingerprint processing layer 60 reduces the surface tension of the glass to the minimum according to the lotus leaf principle, and the contact area between the dust and the outer surface 22 is reduced by 90%, so that the outer surface 22 has strong hydrophobic, oil-resistant and fingerprint-resistant capabilities, so that the viewing glass panel can maintain a smooth and bright effect for a long time. The anti-reflection and anti-reflection processing layer 60 achieves the effect of anti-reflection by increasing the transmittance of the protective glass 20 and reducing the reflectivity of the protective glass 20, thereby increasing the transmittance of the protective glass 20. The anti-glare processing layer 60 achieves the effect of multi-angle diffuse reflection by performing special treatment on one or both sides of the glass surface, thereby increasing the viewing angle of the picture, reducing the interference of ambient light, reducing screen reflection, and thus achieving better visual effects. The specific formation methods of the anti-fingerprint processing layer 60, the anti-reflection and anti-reflection processing layer 60 and the anti-glare processing layer 60 can refer to the existing technology and are not specifically limited here.

[0044] The present application also proposes a method for spraying a silica sol layer 30, which is used to spray a silica sol mildew preventer on the inner surface 21 of the protective glass 20. Specifically, the spraying method includes preparing a glass to be processed and a silica sol mildew preventer of any of the above embodiments, and then spraying the silica sol mildew preventer onto the surface of the glass to be processed by a thermal spraying process. The thermal spraying parameters include: a nozzle diameter of 0.3±0.06mm, a nozzle speed of 0.1±0.02m / min, a nozzle atomization pressure of 0.2±0.04MPa, a distance between the nozzle and the glass to be processed of 100±20mm, a flow rate of the silica sol mildew preventer of 30±6g / min, a fan pressure of the silica sol mildew preventer of 0.3±0.06MPa, and a thermal spraying temperature of 85±5℃.

[0045] Specifically, the glass to be processed is the protective glass 20 in the display device 100, and the inner surface 21 of the protective glass 20 is the surface to be sprayed. In order to allow the silica sol layer 30 to cover the light-shielding ink 40, the inner surface 21 of the protective glass 20 should be coated with the light-shielding ink 40 before spraying.

[0046] When preparing the silica sol mildew preventer, 5% to 10% of silicon dioxide, 0.1% to 1% of silane coupling agent, 5% to 15% of organic silicon compound, 73% to 90% of diluent and 0.1% to 1% of antistatic agent are uniformly mixed according to weight percentage.

[0047] The thermal spraying process refers to a coating process in which the coating material is heated and melted by a thermal spraying device, atomized into extremely fine particles by a high-speed airflow, and sprayed onto the surface of the workpiece at a very high speed to form a coating. In this application, the protective glass 20 is fixed before spraying, the silica sol mildew inhibitor is poured into the material storage box of the thermal spraying device, and after the relevant thermal spraying parameters are set on the thermal spraying device, the thermal spraying device can be started and spraying can be started. In this application, the specific thermal spraying parameters include: the nozzle diameter of the thermal spraying device is 0.3±0.06mm, the nozzle speed is 0.1±0.02m / min, the nozzle atomization pressure is 0.2±0.04MPa, the distance between the nozzle and the glass to be processed is 100±20mm, the flow rate of the silica sol mildew inhibitor is 30±6g / min, the fan pressure of the silica sol mildew inhibitor is 0.3±0.06MPa, and the thermal spraying temperature is 85±5℃.

[0048] Among them, the nozzle of the thermal spraying equipment is a circular tube, and its diameter is 0.3±0.06mm, specifically 0.24mm, 0.26mm, 0.28mm, 0.3mm, 0.32mm, 0.34mm, 0.36mm and the like.

[0049] The nozzle speed refers to the moving speed of the nozzle relative to the protective glass 20, which is 0.1±0.02 m / min, and can be specifically 0.08 m / min, 0.09 m / min, 0.1 m / min, 0.11 m / min, 0.12 m / min, and the like.

[0050] The nozzle atomization pressure refers to the pressure for atomizing the silica sol, which is 0.2±0.04 MPa, and can be specifically 0.16 MPa, 0.18 MPa, 0.19 MPa, 0.2 MPa, 0.22 MPa, 0.23 MPa, 0.24 MPa, and the like.

[0051] The distance between the nozzle and the glass to be processed refers to the distance between the nozzle outlet and the protective glass 20, which is 100±20mm, and can be 80mm, 85mm, 90mm, 95mm, 100mm, 105mm, 110mm, 115mm, 120mm, etc.

[0052] The flow rate of silica sol mildew inhibitor refers to the dosage of silica sol mildew inhibitor inhaled into the nozzle of the hot spray equipment per unit time, which is 30±6g / min, and can be specifically 24g / min, 26g / min, 28g / min, 30g / min, 32g / min, 34g / min, 36g / min, etc.

[0053] The fan-shaped pressure of the silica sol mildew preventer sprayed out refers to the pressure that makes the silica sol mildew preventer form a radial diffusion shape after being sprayed out of the nozzle, which is 0.3±0.06MPa, and can be specifically 0.24MPa, 0.26MPa, 0.28MPa, 0.3MPa, 0.32MPa, 0.34MPa, 0.36MPa and the like.

[0054] The hot spray temperature refers to the temperature of the silica sol mildew inhibitor when spraying, which is 85±5°C, and can be specifically 80°C, 82°C, 84°C, 85°C, 87°C, 89°C, 90°C, etc.

[0055] The spraying method of the silica sol layer 30 of the present application adopts the above-mentioned hot spraying parameters to spray the silica sol mildew inhibitor onto the inner surface 21 of the protective glass 20, so as to form a silica sol layer 30 with good uniformity, high stability, high transparency, strong adhesion and high moisture resistance on the protective glass 20, thereby avoiding the problems of watermarks and mildew on the inner surface 21 of the protective glass 20.

[0056] It should also be noted that when setting the thermal spray parameters, it is generally necessary to set the movement route of the nozzle. In the embodiment of the present application, the nozzle moves along a W-shaped route, which can improve the spraying efficiency and ensure that the silica sol mildew inhibitor fully and evenly covers the protective glass 20. Of course, other movement routes can also be set according to the needs, such as setting the movement route to a U-shape, an L-shape, etc.

[0057] The silica sol mildew inhibitor provided in the embodiments of the present application is introduced in detail above. The principles and implementation methods of the present application are described in detail using specific examples herein. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present application.

Claims

1. A silica sol mildew inhibitor, characterized in that: Included by weight percentage: 5% to 10% silicon dioxide, 0.1% to 1% silane coupling agent, 73% to 90% diluent, 5% to 15% organosilicon compound and 0.1% to 1% antistatic agent; Wherein, the silicon dioxide is silicon dioxide particles, and the particle size of the silicon dioxide particles is not less than 10 nanometers and not more than 100 nanometers.

2. The silica sol mildew inhibitor according to claim 1, characterized in that: The silicon dioxide is silicon dioxide particles with irregular shapes.

3. The silica sol mildew inhibitor according to claim 1, characterized in that: In the silicon dioxide, 85% to 95% of the silicon dioxide particles have a particle size of not less than 28 nanometers and not more than 32 nanometers.

4. The silica sol mildew inhibitor according to claim 1, characterized in that: The diluent is any one or more of acetone, methyl ethyl ketone, cyclohexanone, benzene, toluene, xylene, n-butanol, and styrene; The silane coupling agent includes any one or more of vinyl triethoxysilane, vinyl trimethoxysilane, and vinyl triacetoxysilane; The organosilicon compound includes any one or more of bioactive organosilicon, silicone oil, silicone rubber, and silicone resin.

5. The silica sol mildew inhibitor according to any one of claims 1 to 4, characterized in that: The antistatic agent is a fluorine-free antistatic agent.

6. A display device, characterized in that: include: A display module, on which a display screen is mounted; as well as, A protective glass, the protective glass covers the display screen and is spaced apart from the display screen, the protective glass having an inner surface facing the display screen; The inner surface is coated with a silica sol layer, and the silica sol layer is sprayed by the silica sol mildew inhibitor according to any one of claims 1 to 5.

7. The display device according to claim 6, characterized in that The thickness of the silica sol layer is not less than 30 nanometers and not more than 100 micrometers.

8. The display device according to claim 6, characterized in that Light-shielding ink is also provided on the inner surface of the protective glass, and the silica sol layer covers the light-shielding ink.

9. The display device according to claim 6, characterized in that Pits or convex patterns are also formed on the inner surface, and the silica sol coating completely covers the pits or the convex patterns.

10. The display device according to claim 6, characterized in that The protective glass is also provided with an outer surface opposite to the inner surface, and a processing layer is provided on the outer surface, and the processing layer includes any one or more layers of an anti-fingerprint processing layer, an anti-reflection and anti-transmittance processing layer, and an anti-glare processing layer.

11. A method for spraying a silica sol layer, characterized in that: include: Prepare glass to be processed and the silica sol mildew inhibitor as claimed in any one of claims 1 to 5; Spraying the silica sol mildew inhibitor onto the surface of the glass to be processed by a thermal spraying process; Among them, the hot spraying parameters include: nozzle diameter of 0.3±0.06mm, nozzle speed of 0.1±0.02m / min, nozzle atomization pressure of 0.2±0.04MPa, the distance between the nozzle and the glass to be processed is 100±20mm, the flow rate of silica sol mildew inhibitor is 30±6g / min, the fan pressure of the silica sol mildew inhibitor sprayed is 0.3±0.06MPa, and the hot spraying temperature is 85±5℃.

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