A method for producing a low doi ag glass

Abstract

The application discloses a preparation method of LOW DOI AG glass, comprising the following steps: (1) silk printing acid-resistant ink on one side of the glass and solidifying, and passivating the other side; (2) performing once sandblasting on the glass obtained in the step (1), and then performing acid pickling and water washing to obtain primary glass; (3) performing twice sandblasting on the primary glass, and then performing water washing and air drying to obtain secondary glass; (4) performing chemical polishing on the secondary glass, removing the acid-resistant ink after cleaning and drying, and drying to obtain the LOW DOI AG glass. Through the twice sandblasting + chemical polishing process, the LOW DOI AG glass with the following comprehensive characteristics is prepared: the sparkle value is 4<sparkle<6, the definition value is 65<DOI<80, the haze value is 15<Haza<25, and the glossiness value is 20<G 60 <40, which is suitable for vehicle display.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of anti-glare glass, and particularly relates to a preparation method of LOW DOI AG glass. BACKGROUND

[0002] AG (Anti-glare) glass, also known as anti-glare glass, is a kind of glass with a special surface treatment. The specific principle is that the high-quality glass is treated on one side or both sides by a process, so that the reflection ratio is lower than that of ordinary glass, thereby reducing the interference of ambient light, improving the clarity of the picture, reducing the screen reflection, making the image clearer and more realistic, and allowing the viewer to enjoy better visual effects. The AG glass not only beautifies the appearance structure of the decoration, but also is widely used in the fields of television splicing wall, television, liquid crystal display, touch screen and industrial instrument, etc.

[0003] The production methods of AG glass generally include spraying method, yellow light etching and chemical etching method. The first two methods are greatly affected by the outside world and have poor reliability, and are less used in the vehicle display industry. The chemical etching method is easy to operate, and the produced product has high reliability, and at present, it has become the mainstream of vehicle AG glass production. With the increasing requirements of the vehicle display industry on safety and visual sense, high requirements are put forward on anti-glare performance, display flare, eye comfort and the like, and it is required that the glass is more comfortable for the eyes in the vehicle display under the same vehicle light environment. It is necessary to evaluate the comprehensive characteristics of various optical indexes of the AG glass, and obtain a set of optical performance so that the eyes are more comfortable in the vehicle display environment.

[0004] Chinese patent CN104609736B discloses an anti-glare liquid for glass, a preparation method thereof and a method for preparing anti-glare glass by using the anti-glare liquid. The anti-glare liquid is prepared by mixing the following raw materials in mass fraction: 22% of ammonium fluoride, 4.1% of ammonium sulfate, 1.9% of potassium sulfate, 2.8% of calcium fluoride, 1.0% of zinc chloride, 1.5% of sodium fluorosilicate, 4.4% of barium sulfate, 1.5% of corn starch, 0.8% of a glucose solution with a mass concentration of 50%, and 17% of concentrated sulfuric acid with a mass concentration of 98%, and 43% of deionized water. The prepared anti-glare glass has good light transmission, uniform thickness, and is not easy to leave scratches and fingerprints on the surface. At the same time, there is no waste liquid and waste gas emission in the process of preparing the anti-glare glass, the harm to the operating personnel and the environment is small, and the anti-glare glass has good economic and social benefits.

[0005] Chinese patent CN102627407B discloses a glass full anti-glare and local non-anti-glare processing technology, mainly using physical and mechanical polishing process, chemical etching process and sand blasting impact process on the surface of electronic grade glass to produce fine concave-convex surface on the glass surface. After the process, for touch panel products, the contact area is reduced when the hand touches, the resistance generated when the hand touches is reduced, and the effect of making the anti-glare (AG) on the outer surface of the display is more flexible and good. When looking at the screen, the external light is diffusely reflected, so that the eyes do not feel the reflected light, so that the user can see the true color of the display well.

[0006] The AG products on the market do not pay enough attention to the user experience of vehicle display, and the focus is only on the single optical performance of the product, and the depth of comprehensive performance research is not enough, which is not suitable for eye comfort in vehicle environment. The specific performance is that the higher the clarity and gloss of the glass, the smaller the haze, the greater the reflectivity of external light, and the naked eye cannot see the screen in strong external light. On the contrary, the smaller the clarity and gloss of the glass, the greater the haze, the smaller the reflectivity of external light, and the naked eye can easily see the screen, but the transmission of the screen will be reduced, which will affect the clear screen image. Therefore, the comprehensive performance of appropriate gloss, clarity and haze parameters must be selected, and the crystal layer parameters must be analyzed to obtain a LOW DOI AG glass which can consider sparkle, anti-glare effect, clarity and other characteristics.

[0007] SUMMARY

[0008] In view of the above technical problems, the present application provides a preparation method of a LOW DOI AG glass, which is prepared by twice sanding + chemical polishing process to obtain a LOW DOI AG glass with 4 60 <40 comprehensive characteristics, which is suitable for vehicle display.

[0009] In order to achieve the above purpose, the present application provides a preparation method of a LOW DOI AG glass, comprising the following steps:

[0010] (1) silk screen printing acid-resistant ink on one side of the glass and curing, and passivating the other side;

[0011] (2) sanding the glass obtained in step (1) once, and then acid washing and water washing to obtain a first glass;

[0012] (3) sanding the first glass twice, and then water washing and air drying to obtain a second glass;

[0013] (4) the secondary glass is chemically polished, and after cleaning and drying, the acid-resistant ink is removed, and the LOW DOI AG glass is obtained after drying.

[0014] Preferably, the acid pickling in step (1) uses a hydrofluoric acid solution with a mass percentage of 0.5-1%.

[0015] Preferably, the time for the first sandblasting in step (2) is 60-120s, and the temperature is 18-28℃; the acid pickling uses a hydrofluoric acid solution with a mass percentage of 1-2%.

[0016] Preferably, the sandblasting liquid for the first sandblasting in step (2) is composed of the following raw materials in weight parts: ammonium bifluoride 28-35 parts, ammonium fluoride 5-8 parts, sodium fluorosilicate 3-5 parts, sulfamic acid 6-12 parts, barium sulfate 1-4 parts, bentonite 1-4 parts, ferric chloride 12-19 parts, potassium nitrate 4-8 parts, potassium fluoride 4-7 parts, and water 18-28 parts.

[0017] Preferably, the sandblasting liquid for the second sandblasting in step (3) is composed of the following raw materials in weight parts: ammonium bifluoride 14-20 parts, citric acid 6-10 parts, barium sulfate 2-5 parts, hydroxy starch 1-4 parts, ferric chloride 5-9 parts, potassium nitrate 11-16 parts, potassium fluoride 12-17 parts, sodium sulfate 4-6 parts, and water 26-35 parts.

[0018] Preferably, the temperature for the second sandblasting in step (3) is 40-80s, and the temperature is 18-28℃.

[0019] Preferably, the treatment liquid for the chemical polishing in step (4) is composed of the following raw materials in mass percentage: 5%-7% of ammonium bifluoride, 1%-5% of sulfuric acid, 1%-3% of ammonium bifluoride, 0.2-0.6% of sodium cellulose, and 84%-94% of water; the treatment time for the chemical polishing is 15-30min, and the treatment temperature is 33-42℃.

[0020] Preferably, the removal of the acid-resistant ink in step (4) uses alkali solution removal.

[0021] Further preferably, the conditions for the alkali solution removal are 40-45℃, and the time is 8-12min.

[0022] More preferably, the alkali solution is sodium hydroxide with a mass percentage of 10-12%.

[0023] The beneficial effect of the present application is that the glass is processed by twice sandblasting + chemical polishing process, and the sandblasting liquid formula used in each sandblasting is different, relatively large particle crystal grains are formed on the glass surface in the first sandblasting, and relatively small particle crystal grains are formed on the glass surface in the second sandblasting, so that a special structure crystal type is formed on the glass surface. The special structure crystal type is that small particle crystal grains are uniformly inlaid around the large particle crystal grains, so as to control the transmission light and reflection light of the glass in the inside and outside within a suitable range, the transmission light in the screen can clearly display the picture, the reflection light outside forms a certain diffuse reflection, reduces the proportion of the reflection light entering the naked eye, and reduces the interference of the reflection light; finally, a good anti-dazzle effect, moderate sparkle, and higher definition are obtained, which can better meet the experience of the human eye in the vehicle environment. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The AG glass crystal type prepared for Example 1.

[0025] Figure 2 The AG glass crystal type prepared for Example 2. DETAILED DESCRIPTION

[0026] The technical solutions of the present application will be further explained and described below in combination with the drawings and specific examples. It should be noted that the following examples are only preferred embodiments of the present application, and should not be understood as limiting the present application, and the protection scope of the present application should be subject to the content recited in the claims. The modifications and replacements of the technical solutions of the present application made by the person skilled in the art without creative labor fall within the protection scope of the present application.

[0027] Example 1

[0028] (1) silk screen anti-acid ink on one surface of the glass and cure at 50℃; then perform acid washing on the other surface of the glass with 0.5% hydrofluoric acid solution to slightly etch and passivate the glass surface, and wash the residual acid with pure water after passivation is completed;

[0029] (2) configure sandblasting liquid:

[0030] First sandblasting liquid: ammonium hydrogen fluoride 29 parts, ammonium fluoride 6 parts, sodium fluorosilicate 4 parts, sulfamic acid 10 parts, barium sulfate 2 parts, bentonite 2 parts, ferric chloride 15 parts, potassium nitrate 5 parts, potassium fluoride 5 parts, and water 22 parts;

[0031] Second sandblasting liquid: ammonium hydrogen fluoride 15 parts, citric acid 8 parts, barium sulfate 3 parts, hydroxy starch 2 parts, ferric chloride 8 parts, potassium nitrate 14 parts, potassium fluoride 15 parts, sodium sulfate 5 parts, and water 30 parts;

[0032] (3) The glass obtained in step (1) is placed in the first frosting solution, and after being warmed to 25°C, frosting treatment is performed, and after 60 s, the glass is taken out and cleaned with 2% hydrofluoric acid to remove residual acid, and then washed with pure water to remove residual acid to obtain the first glass;

[0033] (4) The first glass is placed in the second frosting solution, and after being warmed to 25°C, frosting treatment is performed, and after 80 s, the glass is taken out and cleaned with pure water to remove residual acid to obtain the second glass;

[0034] (5) The second glass is dried with hot air, and then placed in a treatment solution, treated at 40°C for 22 min to complete chemical polishing, and then cleaned with pure water to remove residual acid; wherein the treatment solution is composed of the following mass percentage raw materials: hydrogen fluoride 7%, sulfuric acid 4%, ammonium fluoride 1%, sodium cellulose 0.6%, and water 87.4%;

[0035] (6) The glass obtained in step (5) is placed in a sodium hydroxide solution and treated at 42°C for 10 min to remove acid-resistant ink, and then cleaned with pure water to remove residual alkali, and finally dried with hot air to obtain a LOW DOI AG glass Figure 1 ).

[0036] Example 2

[0037] (1) Acid-resistant ink is silk-screen printed on one surface of the glass and cured at 50°C; and then the other surface of the glass is pickled with 1% hydrofluoric acid solution to slightly etch and passivate the surface of the glass, and after passivation, the residual acid is washed away with pure water;

[0038] (2) The frosting solution is prepared:

[0039] The first frosting solution: ammonium fluoride 35 parts, ammonium fluoride 5 parts, sodium fluorosilicate 5 parts, sulfamic acid 6 parts, barium sulfate 1 part, bentonite 4 parts, ferric chloride 12 parts, potassium nitrate 6 parts, potassium fluoride 4 parts, and water 22 parts;

[0040] The second frosting solution: ammonium fluoride 20 parts, citric acid 6 parts, barium sulfate 5 parts, hydroxy starch 1 part, ferric chloride 5 parts, potassium nitrate 11 parts, potassium fluoride 12 parts, sodium sulfate 6 parts, and water 34 parts;

[0041] (3) The glass obtained in step (1) is placed in the first frosting solution, and after being warmed to 25°C, frosting treatment is performed, and after 80 s, the glass is taken out and cleaned with 2% hydrofluoric acid to remove residual acid, and then washed with pure water to remove residual acid to obtain the first glass;

[0042] (4) The first glass is placed in the second frosting solution, and after being warmed to 25°C, frosting treatment is performed, and after 100 s, the glass is taken out and cleaned with pure water to remove residual acid to obtain the second glass;

[0043] (5) The secondary glass is dried by hot air, then is placed in a treatment solution, and is treated at 40°C for 18 min to complete chemical polishing, and then is washed by pure water to remove residual acid; wherein the treatment solution is composed of the following raw materials in mass percentage: hydrogen fluoride 5%, sulfuric acid 5%, ammonium hydrogen fluoride 2%, sodium cellulose 0.6%, and water 87.4%;

[0044] (6) The glass obtained in step (5) is placed in a sodium hydroxide solution, and is treated at 42°C for 10 min to remove acid-resistant ink, and then is washed by pure water to remove residual alkali, and finally is dried by hot air to obtain a LOW DOI AG glass. Figure 2 ).

[0045] Example 3

[0046] (1) An acid-resistant ink is screen-printed on one surface of the glass, and is cured at 50°C; then the other surface of the glass is pickled by using a 0.8% hydrofluoric acid solution to slightly etch and passivate the surface of the glass, and after the passivation is completed, the residual acid is washed away by pure water;

[0047] (2) A frosting solution is prepared:

[0048] The primary frosting solution is composed of the following raw materials in parts: ammonium hydrogen fluoride 28 parts, ammonium fluoride 8 parts, sodium fluorosilicate 3 parts, sulfamic acid 12 parts, barium sulfate 4 parts, bentonite 1 part, ferric trichloride 17 parts, potassium nitrate 4 parts, potassium fluoride 5 parts, and water 18 parts;

[0049] The secondary frosting solution is composed of the following raw materials in parts: ammonium hydrogen fluoride 20 parts, citric acid 6 parts, barium sulfate 5 parts, hydroxy starch 1 part, ferric trichloride 5 parts, potassium nitrate 11 parts, potassium fluoride 12 parts, sodium sulfate 6 parts, and water 34 parts;

[0050] (3) The glass obtained in step (1) is placed in the primary frosting solution, and is frosted after being heated to 25°C, and is taken out after 80 s, and the surface is cleaned by using a 2% hydrofluoric acid solution, and then is washed by pure water to remove residual acid to obtain a primary glass;

[0051] (4) The primary glass is placed in the secondary frosting solution, and is frosted after being heated to 25°C, and is taken out after 40 s, and is washed by pure water to remove residual acid to obtain a secondary glass;

[0052] (5) The secondary glass is dried by hot air, then is placed in a treatment solution, and is treated at 40°C for 18 min to complete chemical polishing, and then is washed by pure water to remove residual acid; wherein the treatment solution is composed of the following raw materials in mass percentage: hydrogen fluoride 5%, sulfuric acid 5%, ammonium hydrogen fluoride 2%, sodium cellulose 0.6%, and water 87.4%;

[0053] (6) The glass obtained in step (5) is placed in a sodium hydroxide solution, and is treated at 42°C for 10 min to remove acid-resistant ink, and then is washed by pure water to remove residual alkali, and finally is dried by hot air to obtain a LOW DOI AG glass.

[0054] Example 4

[0055] (1) silk screen anti-acid ink on one surface of the glass and cure at 50°C; then acid wash the other surface of the glass with 1% hydrofluoric acid solution to slightly etch and passivate the glass surface, and then wash the residual acid with pure water;

[0056] (2) prepare the frosting solution:

[0057] First frosting solution: 28 parts of ammonium bifluoride, 6 parts of ammonium fluoride, 3 parts of sodium fluosilicate, 8 parts of sulfamic acid, 2 parts of barium sulfate, 2 parts of bentonite, 12 parts of ferric chloride, 5 parts of potassium nitrate, 6 parts of potassium fluoride, and 28 parts of water;

[0058] Second frosting solution: 14 parts of ammonium bifluoride, 6 parts of citric acid, 2 parts of barium sulfate, 3 parts of hydroxy starch, 6 parts of ferric chloride, 16 parts of potassium nitrate, 16 parts of potassium fluoride, 5 parts of sodium sulfate, and 32 parts of water;

[0059] (3) place the glass obtained in step (1) in the first frosting solution, heat to 25°C, and then perform frosting treatment, take out after 100 s, and then wash the surface with 2% hydrofluoric acid, and then wash with pure water to remove the residual acid to obtain the first glass;

[0060] (4) place the first glass in the second frosting solution, heat to 25°C, and then perform frosting treatment, take out after 60 s, and then wash with pure water to remove the residual acid to obtain the second glass;

[0061] (5) dry the second glass by hot air, and then place it in a treatment solution, treat at 40°C for 25 min to complete chemical polishing, and then wash with pure water to remove the residual acid; the treatment solution is composed of the following raw materials in mass percentage: 6% hydrogen fluoride, 3% sulfuric acid, 1% ammonium bifluoride, 0.5% sodium cellulose, and 89.5% water;

[0062] (6) place the glass obtained in step (5) in a sodium hydroxide solution, treat at 40°C for 12 min to remove the anti-acid ink, and then wash with pure water to remove the residual alkali, and finally dry by hot air to obtain the LOW DOI AG glass.

[0063] Example 5

[0064] (1) silk screen anti-acid ink on one surface of the glass and cure at 50°C; then acid wash the other surface of the glass with 0.5% hydrofluoric acid solution to slightly etch and passivate the glass surface, and then wash the residual acid with pure water;

[0065] (2) prepare the frosting solution:

[0066] First sanding liquid: ammonium fluoride 32 parts, ammonium fluoride 5 parts, sodium fluorosilicate 3 parts, sulfamic acid 6 parts, barium sulfate 1 part, bentonite 1 part, ferric chloride 19 parts, potassium nitrate 8 parts, potassium fluoride 7 parts and water 18 parts;

[0067] Second sanding liquid: ammonium fluoride 15 parts, citric acid 10 parts, barium sulfate 3 parts, hydroxyl starch 4 parts, ferric chloride 9 parts, potassium nitrate 14 parts, potassium fluoride 17 parts, sodium sulfate 4 parts, water 24 parts;

[0068] (3) The glass obtained in step (1) is placed in the first sanding liquid, and after being heated to 18°C, sanding treatment is performed, and after 120s, the surface is cleaned with 1% hydrofluoric acid, and then washed with pure water to remove residual acid to obtain a first glass;

[0069] (4) The first glass is placed in the second sanding liquid, and after being heated to 18°C, sanding treatment is performed, and after 120s, the surface is cleaned with pure water to remove residual acid to obtain a second glass;

[0070] (5) The second glass is dried by hot air, and then placed in a treatment liquid, treated at 33°C for 30min to complete chemical polishing, and then washed with water to remove residual acid; wherein the treatment liquid is composed of the following mass percentage raw materials: hydrogen fluoride 5%, sulfuric acid 1%, ammonium fluoride 1%, sodium cellulose 0.2%, and water 92.8%;

[0071] (6) The glass obtained in step (5) is placed in a sodium hydroxide solution and treated at 40°C for 15min to remove acid-resistant ink, and then washed with pure water to remove residual alkali, and finally dried by hot air to obtain a LOW DOI AG glass.

[0072] Comparative Example 1

[0073] (1) Acid-resistant ink is silk-screen printed on one surface of the glass, and cured at 50°C; then the other surface of the glass is pickled with 1% hydrofluoric acid solution to slightly etch and passivate the surface of the glass, and after passivation, the residual acid is washed away with pure water;

[0074] (2) Sanding liquid is prepared: ammonium fluoride 29 parts, ammonium fluoride 6 parts, sodium fluorosilicate 4 parts, sulfamic acid 10 parts, barium sulfate 2 parts, bentonite 2 parts, ferric chloride 15 parts, potassium nitrate 5 parts, potassium fluoride 5 parts, and water 22 parts;

[0075] (3) The glass obtained in step (1) is placed in the sanding liquid, and after being heated to 25°C, sanding treatment is performed, and after 60s, the surface is cleaned with 2% hydrofluoric acid, and then washed with pure water to remove residual acid to obtain a sanding glass;

[0076] (4) The fritted glass is dried by hot air, then placed in a treatment solution, treated at 40°C for 22 min to complete chemical polishing, then washed with pure water to remove residual acid; wherein the treatment solution is composed of the following mass percentage raw materials: hydrogen fluoride 7%, sulfuric acid 4%, ammonium hydrogen fluoride 1%, sodium cellulose 0.6%, and water 87.4%;

[0077] (6) The glass obtained in step (5) is placed in a sodium hydroxide solution, treated at 42°C for 10 min to remove the acid-resistant ink, then washed with pure water to remove residual alkali, and finally dried by hot air to obtain AG glass.

[0078] Comparative Example 2

[0079] (1) Acid-resistant ink is screen-printed on one surface of the glass and cured at 50°C; then the other surface of the glass is pickled with a 1% hydrofluoric acid solution to slightly etch and passivate the surface of the glass, and after passivation is completed, the residual acid is washed away with pure water;

[0080] (2) A frit solution is prepared: ammonium hydrogen fluoride 15 parts, citric acid 8 parts, barium sulfate 3 parts, hydroxy starch 2 parts, ferric chloride 8 parts, potassium nitrate 14 parts, potassium fluoride 15 parts, sodium sulfate 5 parts, and water 30 parts;

[0081] (3) The glass obtained in step (1) is placed in the frit solution, heated to 25°C for fritting treatment, taken out after 80 s, and washed with pure water to remove residual acid to obtain fritted glass;

[0082] (4) The fritted glass is dried by hot air, then placed in a treatment solution, treated at 40°C for 22 min to complete chemical polishing, then washed with pure water to remove residual acid; wherein the treatment solution is composed of the following mass percentage raw materials: hydrogen fluoride 7%, sulfuric acid 4%, ammonium hydrogen fluoride 1%, sodium cellulose 0.6%, and water 87.4%;

[0083] (6) The glass obtained in step (5) is placed in a sodium hydroxide solution, treated at 42°C for 10 min to remove the acid-resistant ink, then washed with pure water to remove residual alkali, and finally dried by hot air to obtain AG glass.

[0084] Comparative Example 3

[0085] (1) Acid-resistant ink is screen-printed on one surface of the glass and cured at 50°C; then the other surface of the glass is pickled with a 0.5% hydrofluoric acid solution to slightly etch and passivate the surface of the glass, and after passivation is completed, the residual acid is washed away with pure water;

[0086] (2) A frit solution is prepared: ammonium hydrogen fluoride 29 parts, ammonium fluoride 6 parts, sodium fluorosilicate 4 parts, sulfamic acid 10 parts, barium sulfate 2 parts, bentonite 2 parts, ferric chloride 15 parts, potassium nitrate 5 parts, potassium fluoride 5 parts, and water 22 parts;

[0087] (3) The glass obtained in step (1) is placed in the frosting liquid, and after being warmed to 25°C, frosting treatment is performed, and after 60 s, the glass is taken out and the surface is cleaned with 2% hydrofluoric acid, and then washed with pure water to remove residual acid to obtain a first glass;

[0088] (4) The first glass is again placed in the frosting liquid, and after being warmed to 25°C, frosting treatment is performed, and after 80 s, the glass is taken out and cleaned with pure water to remove residual acid to obtain a second glass;

[0089] (5) The second glass is dried with hot air, and then placed in a treatment liquid, and treated at 40°C for 22 min to complete chemical polishing, and then cleaned with water to remove residual acid; wherein the treatment liquid is composed of the following mass percentage raw materials: hydrogen fluoride 7%, sulfuric acid 4%, ammonium fluoride 1%, sodium cellulose 0.6%, and water 87.4%;

[0090] (6) The glass obtained in step (5) is placed in a sodium hydroxide solution and treated at 42°C for 10 min to remove acid-resistant ink, and then cleaned with pure water to remove residual alkali, and finally dried with hot air to obtain a LOW DOI AG glass.

[0091] Comparative Example 4

[0092] (1) Acid-resistant ink is screen-printed on one surface of the glass, and cured at 50°C; and then the other surface of the glass is pickled with a 0.5% hydrofluoric acid solution to slightly etch and passivate the surface of the glass, and after passivation is completed, the residual acid is washed away with pure water;

[0093] (2) A frosting liquid is prepared: ammonium fluoride 15 parts, citric acid 8 parts, barium sulfate 3 parts, hydroxy starch 2 parts, ferric chloride 8 parts, potassium nitrate 14 parts, potassium fluoride 15 parts, sodium sulfate 5 parts, and water 30 parts;

[0094] (3) The glass obtained in step (1) is placed in the frosting liquid, and after being warmed to 25°C, frosting treatment is performed, and after 60 s, the glass is taken out and the surface is cleaned with 2% hydrofluoric acid, and then washed with pure water to remove residual acid to obtain a first glass;

[0095] (4) The first glass is again placed in the frosting liquid, and after being warmed to 25°C, frosting treatment is performed, and after 80 s, the glass is taken out and cleaned with pure water to remove residual acid to obtain a second glass;

[0096] (5) The second glass is dried with hot air, and then placed in a treatment liquid, and treated at 40°C for 22 min to complete chemical polishing, and then cleaned with water to remove residual acid; wherein the treatment liquid is composed of the following mass percentage raw materials: hydrogen fluoride 7%, sulfuric acid 4%, ammonium fluoride 1%, sodium cellulose 0.6%, and water 87.4%;

[0097] (6) The glass obtained in step (5) is placed in a sodium hydroxide solution and treated at 42°C for 10 min to remove the acid-resistant ink, and then washed with pure water to remove residual alkali, and finally dried by hot air to obtain a LOW DOI AG glass.

[0098] Comparative Example 5

[0099] (1) An acid-resistant ink is screen-printed on one surface of the glass and cured at 50°C; and then the other surface of the glass is pickled with a 0.5% hydrofluoric acid solution to slightly etch and passivate the surface of the glass, and then washed with pure water to remove residual acid;

[0100] (2) A frosting solution is prepared: 22 parts of ammonium hydrogen fluoride, 3 parts of ammonium fluoride, 2 parts of sodium fluorosilicate, 5 parts of sulfamic acid, 4 parts of citric acid, 2.5 parts of barium sulfate, 1 part of bentonite, 1 part of hydroxy starch, 11.5 parts of ferric chloride, 9.5 parts of potassium nitrate, 10 parts of potassium fluoride, 2.5 parts of sodium sulfate, and 26 parts of water;

[0101] (3) The glass obtained in step (1) is placed in the frosting solution, and after being heated to 25°C, frosting treatment is performed, and after 60 s, the surface is cleaned with 2% hydrofluoric acid, and then washed with pure water to remove residual acid to obtain a frosted glass;

[0102] (4) The frosted glass is dried by hot air, and then placed in a treatment solution and treated at 40°C for 22 min to complete chemical polishing, and then washed with water to remove residual acid; wherein the treatment solution is composed of the following mass percentage raw materials: 7% hydrogen fluoride, 4% sulfuric acid, 1% ammonium hydrogen fluoride, 0.6% sodium cellulose, and 87.4% water;

[0103] (5) The glass obtained in step (4) is placed in a sodium hydroxide solution and treated at 42°C for 10 min to remove the acid-resistant ink, and then washed with pure water to remove residual alkali, and finally dried by hot air to obtain a LOW DOI AG glass.

[0104] Result detection: The AG glasses prepared in the above examples and comparative examples are detected for spark point value by sparkle (SMS-1000), for clarity and gloss by a three-angle gloss haze meter (Rhopoint / IQ206085), for haze value by a haze meter (PG2000-Pro), and for roughness by a roughness meter (Mitutoyo / SJ-210). The results are shown in the following table:

[0105]

[0106] The results show that: using different formulations of sanding liquid to sand twice and chemical polishing once (Examples 1-5) can prepare LOW DOI AG glass with 4 < sparkle < 6, 65 < DOI < 80, 15 < Haza < 25, 20 < G 60 The AG glass prepared by using the sanding liquid once for sanding once (Comparative Example 1) has a large roughness (Ra), and thus forms large crystal grains. The AG glass prepared by using the sanding liquid twice for sanding once (Comparative Example 2) has a small roughness (Ra), and thus forms small crystal grains. The AG glass prepared by using the sanding liquid one for sanding twice (Comparative Example 3) has large crystal grains. The AG glass prepared by using the sanding liquid twice for sanding twice (Comparative Example 4) has increased crystal grains, but the related optical parameters do not meet the required indexes. The AG glass prepared by mixing the sanding liquid one and the sanding liquid twice for sanding once (Comparative Example 5) does not meet the required optical parameters. Therefore, the AG glass cannot be prepared by using the two sanding liquids for sanding and chemical polishing or sanding twice, and only one or two indexes can meet the requirements.

[0107] Eye comfort and visual clarity, eye fatigue, glare response, color perception, and other factors are related to visual comfort. Visual comfort can be improved by increasing picture clarity, reducing glare response, and lighting environment. In addition to the lighting environment, the AG glass with combined optical properties can improve eye comfort. However, the clarity and anti-glare response of the AG glass are not independent, but are mutually influenced. The higher the clarity, the worse the anti-glare; the better the anti-glare, the lower the clarity. Therefore, the appropriate combination of optical parameters must be selected to achieve better eye comfort. The clarity of the AG glass prepared in Examples 1-5 is maintained between 68-77, the clarity is moderate, the anti-glare effect is good, and the eye comfort can be effectively improved.

Claims

1. A method for preparing LOW DOI AG glass, characterized in that: Includes the following steps: (1) Screen print acid-resistant ink on one side of the glass and cure it, while passivating the other side; (2) The glass obtained in step (1) is frosted once, and then acid-washed and water-washed to obtain a new glass; (3) The primary glass is frosted twice, and then washed with water and dried to obtain secondary glass; (4) The secondary glass is chemically polished, cleaned, dried to remove the acid-resistant ink, and then dried to obtain LOW DOI AG glass; The sanding solution for the first sanding step (2) is composed of the following raw materials in parts by weight: 28-35 parts ammonium bifluoride, 5-8 parts ammonium fluoride, 3-5 parts sodium fluorosilicate, 6-12 parts aminosulfonic acid, 1-4 parts barium sulfate, 1-4 parts bentonite, 12-19 parts ferric chloride, 4-8 parts potassium nitrate, 4-7 parts potassium fluoride, and 18-28 parts water; The frosting solution for the secondary frosting in step (3) is composed of the following raw materials in parts by weight: 14-20 parts ammonium bifluoride, 6-10 parts citric acid, 2-5 parts barium sulfate, 1-4 parts hydroxy starch, 5-9 parts ferric chloride, 11-16 parts potassium nitrate, 12-17 parts potassium fluoride, 4-6 parts sodium sulfate, and 26-35 parts water.

2. The preparation method according to claim 1, characterized in that: The passivation in step (1) uses a hydrofluoric acid solution with a mass percentage of 0.5-1%.

3. The preparation method according to claim 1, characterized in that: The sanding time in step (2) is 60-120s and the temperature is 18-28℃; the pickling uses a hydrofluoric acid solution with a mass fraction of 1-2%.

4. The preparation method according to claim 1, characterized in that: The secondary sanding time in step (3) is 40-80 seconds, and the temperature is 18-28℃.

5. The preparation method according to claim 1, characterized in that: The chemical polishing solution in step (4) is composed of the following raw materials by mass percentage: 5%-7% hydrogen fluoride, 1%-5% sulfuric acid, 1%-3% ammonium hydrogen fluoride, 0.2-0.6% sodium cellulose, and 84%-94% water. The sum of all raw materials in the solution is 100%. The chemical polishing time is 15-30 min and the temperature is 33-42℃.

6. The preparation method according to claim 1, characterized in that: The removal of acid-resistant ink in step (4) is achieved by using an alkaline solution.

7. The preparation method according to claim 6, characterized in that: The conditions for alkali removal are 40-45℃ and 8-12 min.

8. The preparation method according to claim 7, characterized in that: The mass percentage of the alkaline solution is 10-12%.

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