A frosting powder for non-flash point anti-glare glass, a preparation method and application thereof

Abstract

The application provides a frosting powder for non-flash-point anti-dazzle glass, which is composed of the following components by mass fraction: 55-65% of A component, 10-30% of B component and 10-30% of C component; the A component is one or more of ammonium fluoride, ammonium bifluoride, ammonium chloride and ammonium sulfate; the B component is one or more of citric acid, sulfamic acid, oxalic acid, starch and barium sulfate; and the C component is one or more of potassium chloride, potassium acetate, potassium fluoride, potassium bifluoride and sorbitol and a crystal nucleus size control agent. The frosting powder is divided into three components, which are mixed again during use, so that chemical reaction of the components after mixing is prevented and the paste after deliquescence is avoided; and the roughness is adjusted conveniently. The crystal nucleus size control agent is introduced, which is uniformly distributed on the surface of the glass during etching of the glass and does not react with hydrofluoric acid, so that discontinuous chemical etching reaction of the glass surface is caused, and a hazy anti-dazzle effect is formed.

Description

Technical Field

[0001] This invention relates to the field of glass surface treatment technology, specifically to a frosting powder for non-flashpoint anti-glare glass, its preparation method, and its application. Background Technology

[0002] With the development of technology, touch screens have begun to enter thousands of households, and the use of touch screen cover glass has increased dramatically. Due to the high reflectivity of glass, it has a mirror-like imaging effect, which seriously affects the display effect, especially under strong outdoor light, making the displayed content difficult to see. This is commonly known as "light-sensitive death." To solve this defect of glass, scientists have developed anti-glare AG glass through extensive experiments. By treating the glass surface with acid etching, the specular reflection of the glass surface is transformed into diffuse reflection, effectively reducing the reflectivity of the glass and solving the defect of glass display screens being "light-sensitive death." It has been well received by the market, especially in recent years with the rise of new energy vehicles, where in-vehicle displays are becoming larger and more numerous, further promoting the development of AG anti-glare glass.

[0003] AG glass is made by chemically etching the glass surface with hydrofluoric acid and certain additives and fillers. The basic principle of chemical etching is to cause a chemical reaction between the silicon oxide layer on the glass surface and hydrofluoric acid or its salts. Through the discontinuous erosion reaction on the glass surface, the crystal structure of the glass surface becomes uneven, changing the specular reflection of the glass surface into diffuse reflection. This effectively reduces the reflectivity of the glass surface, solves the specular reflection effect of glass displays, effectively protects the eyes, and improves the display effect.

[0004] With advancements in TFT LCD panel technology, current TFT LCD displays have evolved from 2K screens to 8K screens. Higher pixel counts mean smaller sub-pixels, reaching nanometer scale, resulting in increasingly clear images. This, in turn, places higher demands on the production technology of AG anti-glare glass, the cover lens. The AG glass bonded to the TFT LCD panel must be free of sparking; that is, the cell size of the AG glass must match the sub-pixel size. The AG glass cell acts like a magnifying glass; if one cell corresponds to one sub-pixel, the display effect is optimal, and the image is clearest. If the cell is too large, corresponding to two or three sub-pixels, sparking will appear, a phenomenon known in the industry. Specialized instruments are used to detect this sparking in displays. Because older displays had lower pixel counts, the requirements for AG glass cell size were not stringent, so no one specifically researched this issue. However, with the emergence of 4K screens, high-end customers began demanding that the AG glass inspection standard include sparking detection. Currently, most AG glass manufacturers are unclear about the causes of sparking, resulting in very few being able to produce truly spark-free AG glass. Currently, most AG glass on the market exhibits flickering points and is primarily used in large screens and some low-requirement displays. However, for high-end displays such as automotive displays, mobile phone displays, and e-readers, AG glass is not accepted by the market due to the presence of snowflake-like patterns and numerous flickering points, which severely affect image clarity. Taking an 8K screen sub-pixel as an example, AG glass requires a gloss level (GU) of 110+ / ~10, a roughness (RA) controlled within 0.04~0.08μm, and a cell base average diameter (RSM) controlled below 25μm to meet the requirement of being flicker-free. These technical requirements are extremely high. Therefore, controlling the size of the crystal nucleus is crucial during the glass etching process. Summary of the Invention

[0005] To address the issue of excessive flickering points in AG glass used in high-end displays, this invention provides a frosting powder for anti-glare glass without flickering points, its preparation method, and its application.

[0006] The present invention adopts the following technical solution:

[0007] This invention provides a frosting powder for anti-glare glass without flashing points. The frosting powder is composed of the following substances in mass fractions: component A 55-65%, component B 10-30%, and component C 10-30%.

[0008] Component A is one or more of ammonium fluoride, ammonium hydrogen fluoride, ammonium chloride, and ammonium sulfate;

[0009] Component B is one or more of citric acid, aminosulfonic acid, oxalic acid, starch, and barium sulfate;

[0010] The C component is one or more of potassium chloride, potassium acetate, potassium fluoride, potassium hydrogen fluoride, and sorbitol, and a crystal nucleus size control agent.

[0011] This invention divides the frosting powder into three components, which are then mixed before use. The reasons are as follows: First, to prevent chemical reactions from occurring after the components are mixed, which would cause deliquescence and turn the powder into a paste. Second, to facilitate the adjustment of roughness during use, since each component has a different function. Component A mainly provides hydrofluoric acid for etching the glass, component B mainly provides acidity and viscosity, and component C mainly controls the fineness of the glass etching process, that is, the roughness of the etched glass surface (RA and the average diameter of the cell base RSM).

[0012] Furthermore, the crystal nucleus size control agent is one or more of potassium fluorosilicate, sodium fluorosilicate, calcium fluoride, potassium fluoroborate, lead fluoride, fumed silica, and rutile titanium dioxide.

[0013] In the formulation design of glass etching powder, some salts with low solubility, such as calcium fluoride, potassium fluorosilicate, and sodium fluorosilicate, can be added as needed to crystallize on the glass surface, act as crystal nuclei, and block hydrofluoric acid from etching the glass. The part of the glass surface not covered by the crystal nuclei, that is, the gap between the crystal nuclei, is still exposed to the etching solution, and the hydrofluoric acid will continue to etch. After the glass surface is etched unevenly, it becomes an uneven and matte surface.

[0014] The aforementioned crystal nucleus size control agent refers to substances such as potassium fluorosilicate that are ground to achieve a particle size at the micron level. During glass etching, the crystal nucleus size control agent is evenly distributed on the glass surface and does not react with hydrofluoric acid, causing a discontinuous chemical etching reaction on the glass surface, thereby creating a hazy anti-glare effect.

[0015] Furthermore, the particle size of the nucleus size control agent is 5–30 μm. The nucleus size control agent is distributed on the glass surface, blocking the reaction between hydrofluoric acid and glass. Different particle sizes of the nucleus size control agent can form glass surfaces with different roughness, thereby obtaining anti-glare glass with different effects.

[0016] The present invention also provides a method for preparing frosting powder for anti-glare glass without flashing point, comprising the following steps: preparing and packaging components A, B and C of the frosting powder respectively.

[0017] Furthermore, when component A is two or more of ammonium fluoride, ammonium bifluoride, ammonium chloride, and ammonium sulfate, the preparation method of component A includes the following steps: adding each raw material of component A to a mixing mixer and stirring for 30 minutes, then pulverizing it to 100 mesh using a Raymond mill, and packaging it to obtain component A of the frosted powder.

[0018] Furthermore, when component B is two or more of citric acid, aminosulfonic acid, oxalic acid, starch, and barium sulfate, the preparation method of component B includes the following steps: adding each raw material of component B to a mixer and stirring for 30 minutes, and then packaging to obtain component B of the frosting powder.

[0019] Furthermore, the preparation method of component C includes the following steps: one or more of potassium chloride, potassium acetate, potassium fluoride, potassium hydrogen fluoride, and sorbitol are added, a crystal nucleus size control agent is added, and after stirring, the mixture is packaged to obtain component C of the frosting powder;

[0020] The present invention also provides the application of frosting powder for non-flashpoint anti-glare glass in automotive non-flashpoint anti-glare glass, industrial control touch screen cover glass or mobile phone cover glass.

[0021] Furthermore, the application of a frosting powder for flashless anti-glare glass in automotive flashless anti-glare glass, industrial control touch screen cover plates, or mobile phone cover plates includes the following steps:

[0022] Step 1: Weigh out components A, B, and C of the frosting powder separately and add them to the mixing tank. Add 5-10 kg of purified water for every 25 kg of frosting powder. Start maturation in a water bath for 72 hours. At the beginning of maturation, the stirring speed is 1000 rpm. After half an hour, reduce the stirring speed to 30-60 rpm. Continue stirring during maturation. The water bath temperature is 40-50℃. The stirring speed is fast in the first half hour because the frosting powder absorbs heat when it is first added to the water, which causes the solution temperature to drop. Rapid stirring is required to accelerate dissolution. After half an hour, all components have been fully dissolved, and the stirring speed can be reduced to slow.

[0023] Step 2: The cured frosting solution is filtered through an 80-100 mesh wire mesh and then placed into the chemical tank of the AG glass automatic production line; the production line is a horizontal line, and the chemical solution uses a curtain-type cloth.

[0024] Step 3: Start the acid-resistant pump to circulate the solution, adjust the feed valve to ensure that the curtain of the fabric head is uniform, continuous, and does not split;

[0025] Step 4: Use a coating machine to protect the tin side of the glass that does not need to be etched with a film, and place it on the fully automatic AG glass production line; after the coated glass goes through the automatic line's water washing, 5% hydrofluoric acid solution pickling, water washing, water control and other processes, it quickly passes through the chemical curtain, and the chemical reacts on the glass surface for 10 to 30 seconds.

[0026] Step 5: The wind-cutting process recovers the chemical solution, and then the glass is cleaned through the water washing section;

[0027] Step 6: The cleaned glass is chemically polished with a 10% to 15% hydrofluoric acid polishing solution. The polishing time is adjusted according to the AG glass parameters required by the customer. The polished glass is then cleaned and inspected to obtain the finished product.

[0028] Compared with the prior art, the present invention has the following technical effects:

[0029] 1. The present invention divides the frosting powder into three components, which are then mixed before use. The reasons are as follows: first, to prevent chemical reactions from occurring after the components are mixed, which would cause the powder to deliquesce and become a paste; second, to facilitate the adjustment of roughness during use.

[0030] 2. This invention introduces a crystal nucleus size control agent for the first time. During glass etching, the crystal nucleus size control agent is evenly distributed on the glass surface and does not react with hydrofluoric acid, causing a discontinuous chemical etching reaction on the glass surface, thereby forming a hazy anti-glare effect. By distributing crystal nucleus size control agents of different fineness on the glass surface, the reaction between hydrofluoric acid and glass is blocked, thereby obtaining anti-glare glass with different effects.

[0031] 3. By adjusting the type and content of potassium-containing salts and crystal nucleus size control agents in component C, the cell size can be adjusted to meet the needs of different customers.

[0032] 4. The frosting powder of the present invention is suitable for surface treatment of ordinary soda-lime glass and various high-alumina glass. Attached Figure Description

[0033] Figures 1 to 2 This is a metallographic image of the anti-glare glass without flashing points after frosting powder treatment according to Embodiment 1 of the present invention;

[0034] Figures 3 to 5 This is a metallographic image of the anti-glare glass without flashing points after frosting powder treatment according to Embodiment 2 of the present invention;

[0035] Figures 6 to 7 This is a metallographic image of the anti-glare glass without flashing points after frosting powder treatment according to Embodiment 3 of the present invention;

[0036] Figures 8 to 10 This is a metallographic image of the glass treated with frosting powder according to Comparative Example 1 of the present invention.

[0037] Figure 11 This is a metallographic image of the glass treated with frosting powder according to Comparative Example 2 of the present invention. Detailed Implementation

[0038] The present invention will be further described below with reference to specific embodiments.

[0039] This invention provides a frosting powder for anti-glare glass without flashing points. The frosting powder is composed of the following substances in mass fractions: component A 55-65%, component B 10-30%, and component C 10-30%.

[0040] Component A is one or more of ammonium fluoride, ammonium hydrogen fluoride, ammonium chloride, and ammonium sulfate;

[0041] Component B is one or more of citric acid, aminosulfonic acid, oxalic acid, starch, and barium sulfate;

[0042] The C component is one or more of potassium chloride, potassium acetate, potassium fluoride, potassium hydrogen fluoride, and sorbitol, and a crystal nucleus size control agent.

[0043] The crystal nucleus size control agent is one or more of potassium fluorosilicate, sodium fluorosilicate, calcium fluoride, potassium fluoroborate, lead fluoride, fumed silica, and rutile titanium dioxide.

[0044] The particle size of the crystal nucleus size control agent is 5–30 μm.

[0045] The present invention also provides a method for preparing frosting powder for anti-glare glass without flashing point, comprising the following steps: preparing and packaging components A, B and C of the frosting powder respectively.

[0046] When component A is two or more of ammonium fluoride, ammonium bifluoride, ammonium chloride, and ammonium sulfate, the preparation method of component A includes the following steps: adding each raw material of component A to a mixing mixer and stirring for 30 minutes, then pulverizing it to 100 mesh using a Raymond mill, and packaging it to obtain component A of the frosting powder.

[0047] When component B is two or more of citric acid, aminosulfonic acid, oxalic acid, starch, and barium sulfate, the preparation method of component B includes the following steps: adding each raw material of component B to a mixer and stirring for 30 minutes, and then packaging to obtain component B of frosting powder.

[0048] The preparation method of component C includes the following steps: take one or more of the following raw materials: potassium chloride, potassium acetate, potassium fluoride, potassium hydrogen fluoride, and sorbitol; add crystal nucleus size control agents of different fineness; after stirring, package to obtain component C of frosting powder.

[0049] The present invention also provides an application of frosting powder for non-flashpoint anti-glare glass in automotive non-flashpoint anti-glare glass, industrial control touch screen cover plates or mobile phone cover plates.

[0050] The application of a frosting powder for non-flash-point anti-glare glass in automotive non-flash-point anti-glare glass, industrial control touch screen cover plates, or mobile phone cover plates includes the following steps:

[0051] Step 1: Weigh out components A, B and C of the frosting powder separately and add them to the mixing tank. Add 5-10 kg of purified water for every 25 kg of frosting powder. Start maturation for 72 hours under water bath conditions. The stirring speed is 1000 rpm at the beginning of maturation. After half an hour, the stirring speed is reduced to 30-60 rpm. Keep stirring during maturation. The water bath temperature is 40-50℃.

[0052] Step 2: The cured frosting solution is filtered through an 80-100 mesh wire mesh and then placed into the chemical tank of the AG glass automatic production line; the production line is a horizontal line, and the chemical solution uses a curtain-type cloth.

[0053] Step 3: Start the acid-resistant pump to circulate the solution, adjust the feed valve to ensure that the curtain of the fabric head is uniform, continuous, and does not split;

[0054] Step 4: Use a coating machine to protect the tin side of the glass that does not need to be etched with a film, and place it on the fully automatic AG glass production line; after the coated glass goes through the automatic line's water washing, 5% hydrofluoric acid solution pickling, water washing, water control and other processes, it quickly passes through the chemical curtain, and the chemical reacts on the glass surface for 10 to 30 seconds.

[0055] Step 5: The wind-cutting process recovers the chemical solution, and then the glass is cleaned through the water washing section;

[0056] Step 6: The cleaned glass is chemically polished with a 10% to 15% hydrofluoric acid polishing solution. The polishing time is adjusted according to the AG glass parameters required by the customer. The polished glass is then cleaned and inspected to obtain the finished product.

[0057] This invention appendix Figures 1-5 The microstructure detection instrument used was a metallurgical microscope, model B3230. The green values ​​in the attached figures are RSM values. The magnification of Examples 1-3 and Comparative Example 1 is 200x, and the magnification of Comparative Example 2 is 100x. Figure 1 The two data points are L1=0.0083mm and L4=0.0074mm respectively; Figure 2 for Figure 1 A magnified view of a portion of the image. Figure 3 The three data points are L1=0.0117mm, L2=0.0120mm, and L3=0.0113mm, respectively. Figure 4 and Figure 5 for Figure 3 A magnified view of a portion of the image. Figure 6 The two data points are L1=0.0230mm and L3=0.0198mm respectively; Figure 7 for Figure 6 A magnified view of a portion of the image. Figure 8The two data points are L1=0.0321mm, L2=0.0322mm, and L3=0.0395mm. Figure 9 and Figure 10 for Figure 8 A magnified view of a portion of the image.

[0058] Example 1

[0059] A type of anti-glare frosting powder for non-flash-point glass is disclosed. The frosting powder is composed of components A, B, and C. Components A, B, and C are packaged separately in small packages, then combined and placed into a single bag, with each bag weighing 25 kg. The formulation of each bag of frosting powder is as follows:

[0060] The total weight of component A is 15 kg, and the components of component A are 11.5 kg of ammonium bifluoride, 2.5 kg of ammonium fluoride, and 1 kg of ammonium chloride.

[0061] The total weight of component B is 3.75 kg, and the components of component B are 2.5 kg of citric acid, 0.8 kg of barium sulfate, and 0.45 kg of starch.

[0062] The total weight of component C is 6.25 kg. The components of component C are 2.5 kg of potassium hydrogen fluoride, 1.25 kg of potassium chloride, 1.25 kg of sorbitol, and 1.25 kg of crystal nucleus size control agent with a particle size of 5-10 μm. The crystal nucleus size control agent is 0.85 kg of potassium fluorosilicate and 0.4 kg of fumed silica.

[0063] The specific application method of the frosting powder prepared in this embodiment in automotive anti-glare glass without flashing points includes the following steps:

[0064] Step 1: Take 10 bags of the above-mentioned frosting powder, totaling 250 kg, put them into the mixing tank, add 80 kg of deionized water, start stirring, initially at 1000 rpm, reduce to 60 rpm after half an hour, the mixing tank has a built-in water bath heating, the water bath temperature is 45 degrees, the medicine aging time is 72 hours, and stirring is continuous.

[0065] Step 2: The matured solution is filtered through an 80-mesh wire mesh, and the filtrate is introduced into the solution tank of the AG glass production line;

[0066] Step 3: Start the acid-resistant pump to circulate the solution, adjust the feed valve to ensure that the curtain of the fabric head is uniform, continuous, and does not split;

[0067] Step 4: The glass is coated with tin film and placed on the fully automated AG glass production line. The glass is washed with water and cleaning agent, then pickled with 5% hydrofluoric acid, washed again with water, and then washed with deionized water. After that, it enters the lifting water control zone, where one end of the glass is raised to a 60-degree angle for 2 seconds to control the water. Then the glass is lowered to the horizontal and continues to move forward. The transmission speed of the cleaning section is 4 meters / minute. When the glass is transported to the frosting area, the speed is instantly increased to 30 meters / minute. After the coating is completed, the transmission speed drops back to 4 meters / minute. The reaction time of the chemical on the glass surface is 10 seconds.

[0068] Step 5: The chemical solution is recovered by air cutting. The solution enters a separate recovery tank, is adjusted, and then reused. The glass is then rinsed with water to remove the chemical solution before entering the polishing section. The hydrofluoric acid concentration is 5%, and the polishing time is 3 minutes. The transmission speed of the polishing section is adjustable.

[0069] Step 6: After the polished glass is washed with water to remove the coating, it is then cleaned with deionized water cleaning agent and inspected. The gloss is 100-105 GU, the roughness RA is 0.02-0.04 μm, the RSM is 6-10 μm, the haze is 8-10, the AG surface is good, and there are no flash points.

[0070] Example 2

[0071] A type of anti-glare frosting powder for non-flash-point glass is disclosed. The frosting powder is composed of components A, B, and C. Components A, B, and C are packaged separately in small packages, then combined and placed into a single bag, with each bag weighing 25 kg. The formulation of each bag of frosting powder is as follows:

[0072] The total weight of component A is 15 kg, and the components of component A are 10.5 kg of ammonium bifluoride, 3.5 kg of ammonium fluoride, and 1 kg of ammonium chloride.

[0073] The total weight of component B is 3.75 kg, and the components of component B are 1.25 kg of citric acid, 1.25 kg of aminosulfonic acid, 0.8 kg of barium sulfate, and 0.45 kg of starch.

[0074] The total weight of component C is 6.25 kg. The components of component C are 2.5 kg of potassium chloride, 1.25 kg of potassium acetate, 1.25 kg of sorbitol, and 1.25 kg of a crystal nucleus size control agent with a particle size of 10-20 μm. The crystal nucleus size control agent is 1 kg of sodium fluorosilicate and 0.25 kg of rutile titanium dioxide.

[0075] The specific application method of the frosting powder prepared in this embodiment in automotive anti-glare glass without flashing points includes the following steps:

[0076] Step 1: Take 10 bags of the above-mentioned frosting powder, totaling 250 kg of frosting powder, put them into the mixing tank, add 90 kg of deionized water, start stirring, initially stirring at 1000 rpm, after half an hour reduce to 60 rpm to start maturation. The mixing tank has a built-in water bath heating, the water bath temperature is 45 degrees, the maturation time of the medicine is 72 hours, stirring continuously.

[0077] Step 2: The matured solution is filtered through an 80-mesh wire mesh, and the filtrate is introduced into the solution tank of the AG glass production line;

[0078] Step 3: Start the acid-resistant pump to circulate the solution, adjust the feed valve to ensure that the curtain of the fabric head is uniform, continuous, and does not split;

[0079] Step 4: The glass is coated with tin film and placed on the fully automated AG glass production line. The glass is washed with water and cleaning agent, then pickled with 5% hydrofluoric acid, washed again with water, and then washed with deionized water. After that, it enters the lifting water control zone, where one end of the glass is raised to a 60-degree angle for 2 seconds to control the water. Then the glass is lowered to the horizontal and continues to move forward. The transmission speed of the cleaning section is 4 meters / minute. When the glass is transported to the frosting area, the speed is instantly increased to 30 meters / minute. After the coating is completed, the transmission speed drops back to 4 meters / minute. The reaction time of the chemical on the glass surface is 20 seconds.

[0080] Step 5: The chemical solution is recovered by air cutting. The solution enters a separate recovery tank, is adjusted, and then reused. The glass is then rinsed with water to remove the chemical solution before entering the polishing section. The hydrofluoric acid concentration is 5%, and the polishing time is 4 minutes. The transmission speed of the polishing section is adjustable.

[0081] Step 6: After the polished glass is washed with water to remove the coating, it is then cleaned with deionized water cleaning agent and inspected. The gloss is 110-115 GU, the roughness RA is 0.04-0.05 μm, the RSM is 10-15 μm, the haze is 6-8, the AG surface is good, and there are no flash points.

[0082] Example 3

[0083] A type of anti-glare frosting powder for non-flash-point glass is disclosed. The frosting powder is composed of components A, B, and C. Components A, B, and C are packaged separately in small packages, then combined and placed into a single bag, with each bag weighing 25 kg. The formulation of each bag of frosting powder is as follows:

[0084] The total weight of component A is 15 kg, and the components of component A are 11.5 kg of ammonium bifluoride, 2.5 kg of ammonium fluoride, and 1 kg of ammonium sulfate.

[0085] The total weight of component B is 3.75 kg, and the components of component B are 2 kg of aminosulfonic acid, 0.5 kg of oxalic acid, 0.8 kg of barium sulfate, and 0.45 kg of starch.

[0086] The total weight of component C is 6.25 kg. Component C comprises 2 kg of potassium chloride, 1.25 kg of potassium fluoride, 1.75 kg of sorbitol, and 1.25 kg of a crystal nucleus size control agent with a particle size of 20–30 μm. The crystal nucleus size control agent consists of 0.8 kg of calcium fluoride and 0.45 kg of potassium fluoroborate.

[0087] The specific application method of the frosting powder prepared in this embodiment in automotive anti-glare glass without flashing points includes the following steps:

[0088] Step 1: Take 10 bags of the above-mentioned frosting powder, totaling 250 kg of frosting powder, put them into the mixing tank, add 90 kg of deionized water, start stirring, initially stirring at 1000 rpm, after half an hour reduce to 60 rpm to start maturation. The mixing tank has a built-in water bath heating, the water bath temperature is 45 degrees, the maturation time of the medicine is 72 hours, stirring continuously.

[0089] Step 2: The matured solution is filtered through an 80-mesh wire mesh, and the filtrate is introduced into the solution tank of the AG glass production line;

[0090] Step 3: Start the acid-resistant pump to circulate the solution, adjust the feed valve to ensure that the curtain of the fabric head is uniform, continuous, and does not split;

[0091] Step 4: The glass is coated with tin film and placed on the fully automated AG glass production line. The glass is washed with water and cleaning agent, then pickled with 5% hydrofluoric acid, washed again with water, and then washed with deionized water. After that, it enters the lifting water control zone, where one end of the glass is raised to a 60-degree angle for 2 seconds to control the water. Then the glass is lowered to the horizontal and continues to move forward. The transmission speed of the cleaning section is 4 meters / minute. When the glass is transported to the frosting area, the speed is instantly increased to 30 meters / minute. After the coating is completed, the transmission speed drops back to 4 meters / minute. The reaction time of the chemical on the glass surface is 30 seconds.

[0092] Step 5: The chemical solution is recovered by air cutting. The solution enters a separate recovery tank, is adjusted, and then reused. The glass is then rinsed with water to remove the chemical solution before entering the polishing section. The hydrofluoric acid concentration is 5%, and the polishing time is 10 minutes. The transmission speed of the polishing section is adjustable.

[0093] Step 6: After the polished glass is washed with water to remove the coating, it is then cleaned with deionized water cleaning agent and inspected. The gloss is 115-120 GU, the roughness RA is 0.05-0.06 μm, the RSM is 20-25 μm, the haze is 4-7, the AG surface is good, and there are no flash points.

[0094] Comparative Example 1

[0095] A frosting powder, which is basically the same as in Example 2, except that: the total weight of component C is 6.25 kg, and each component in component C is 2.5 kg of potassium chloride, 1.25 kg of potassium acetate, and 2.5 kg of sorbitol.

[0096] The specific application method of the frosted powder prepared in this embodiment in automotive glass is basically the same as that in Example 2. Finally, the obtained product was inspected and found to have a gloss of 115-120 GU, a roughness RA of 0.1-0.15 μm, an RSM of 30-40 μm, a fogging level of 2-3, good AG surface, a flash point, and poor anti-glare effect.

[0097] Comparative Example 2

[0098] A frosting powder, which is basically the same as in Example 3, except that: the total amount of component C is 6.25 kg, and component C is 6.25 kg of sorbitol.

[0099] The specific application method of the frosted powder prepared in this embodiment in automotive glass is basically the same as that in Example 3. Finally, the obtained product was inspected and found to have a gloss of 100-110 GU, a roughness RA of 0.3-0.4 μm, an RSM of 80-150 μm, a fog level of 1-2, good AG surface, flash point, and poor anti-glare effect.

[0100] The embodiments described above are merely preferred embodiments of the present invention and are only used to explain the present invention. They are not intended to limit the scope of the present invention. For those skilled in the art, other implementation methods can be easily made by substitution or modification based on the technical content disclosed in this specification. Therefore, all changes and improvements made to the principles and process conditions of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A frosting powder for non-flash anti-glare glass, characterized by, The sanding powder is composed of the following components: A component 55-65%, B component 10-30%, C component 10-30%. The A component is one or more of ammonium fluoride, ammonium bifluoride, ammonium chloride, ammonium sulfate; The B component is one or more of citric acid, sulfamic acid, oxalic acid, starch, barium sulfate; The C component is one or more of potassium chloride, potassium acetate, potassium fluoride, potassium bifluoride, sorbitol and a crystal nucleus size control agent; The crystal nucleus size control agent is one or more of potassium fluosilicate, sodium fluosilicate, calcium fluoride, potassium fluoborate, lead fluoride, fumed white carbon black, and rutile titanium dioxide; the particle size of the crystal nucleus size control agent is 5-30 μm.

2. The method for preparing frosting powder for non-flash-point anti-glare glass according to claim 1, characterized in that, The method comprises the following steps: The A component, B component and C component of the sanding powder are prepared and packaged separately.

3. The method for preparing frosting powder for non-flash-point anti-glare glass according to claim 2, characterized in that, When the A component is two or more of ammonium fluoride, ammonium bifluoride, ammonium chloride, ammonium sulfate, the preparation method of the A component comprises the following steps: the raw materials of the A component are added to a mixing stirrer for stirring, stirring for 30 minutes, then pulverized with a Raymond mill, and packaged to obtain the A component of the sanding powder.

4. The method for preparing frosting powder for non-flash-point anti-glare glass according to claim 2, characterized in that, When the B component is two or more of citric acid, sulfamic acid, oxalic acid, starch, barium sulfate, the preparation method of the B component comprises the following steps: the raw materials of the B component are added to a mixing stirrer for stirring, stirring for 30 minutes, then packaged to obtain the B component of the sanding powder.

5. The method of claim 2, wherein the frosting powder for anti-glare glass without a flash point is prepared by adding 0.1 to 0.3 parts by weight of the compound of formula (I) to 100 parts by weight of the glass frit. The preparation method of the C component comprises the following steps: one or more of the raw materials of potassium chloride, potassium acetate, potassium fluoride, potassium bifluoride, and sorbitol are taken, a crystal nucleus size control agent is added, stirring is completed, and then packaged to obtain the C component of the sanding powder.

6. The sanding powder of the non-flash anti-glare glass according to claim 1 is applied to a vehicle-mounted non-flash anti-glare glass, an industrial control touch screen cover plate, or a mobile phone cover plate.

7. Use according to claim 6, characterized in that, The method comprises the following steps: Step 1: the A component, B component and C component of the sanding powder are weighed and added to a batching tank, 5-10 kg of pure water is added to every 25 kg of the sanding powder, and curing is started under water bath conditions for 72 hours; the stirring speed is 1000 rpm at the beginning of the curing, the stirring speed is reduced to 30-60 rpm after half an hour, and the stirring is maintained during the curing; the water bath temperature is 40-50℃; Step 2: the cured sanding liquid is filtered through a 80-100 mesh screen and then placed in a medicine tank of an AG glass automatic production line for subsequent production.

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