Acid etching glass with granular surface structure and preparation method thereof
By optimizing the acid etching solution formulation and process, acid-etched glass with a uniform granular surface structure was prepared, solving the problems of single structure and poor uniformity in traditional acid etching methods, and improving the visual and tactile properties of the glass.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-14
- Publication Date
- 2026-04-10
AI Technical Summary
Traditional acid etching methods for constructing microstructures on glass surfaces suffer from poor structure uniformity and a lack of visual and tactile experience.
By designing specific acid etching solution formulations and processes, the acid etching process is controlled to form a granular surface structure, avoid sharp edges, and ensure uniformity and a soft feel.
The process produces a uniformly sized granular surface structure, improving visual appeal and tactile feel, and is suitable for touch displays and photovoltaic glass covers.
Smart Images
Figure CN121823970A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of cover plate glass, and particularly relates to an acid-etched glass with a granular surface structure and a preparation method thereof. BACKGROUND
[0002] Glass is widely used as a display device cover plate, a photovoltaic glass cover plate and the like due to its high transparency, high hardness, corrosion resistance, aging resistance, scratch resistance and other excellent properties. However, the excellent flatness of the glass surface leads to mirror reflection under strong light, causing visual discomfort. The use of laser etching, photolithography and other equipment can construct a uniform microstructure on the glass surface, but the high cost limits its application scenarios and application fields. The prior art also uses an acid etching method to construct a glass surface microstructure. The traditional acid etching method relies on the deposition accumulation generated in the acid etching process as a self-template to achieve the construction of the glass surface microstructure. The deposition accumulation often exists in a pyramid shape, resulting in an angular acid-etched surface and a strong sharpness of the surface feel. Moreover, the deposition accumulation cannot be uniformly distributed, resulting in poor uniformity. Therefore, the traditional acid etching method for constructing a glass surface microstructure has the problems of single structure and poor uniformity. SUMMARY
[0003] The present application aims to overcome the shortcomings of the prior art and provide an acid-etched glass with a granular surface structure and a preparation method thereof. The present application provides a unique granular surface structure through acid etching liquid formula design and acid etching process. The surface structure of the acid-etched glass is uniform in size and does not produce visual differences. The protrusions of the granular structure are smooth and have no obvious corners, and the feel is softer and more delicate.
[0004] The object of the present application can be achieved by the following technical solutions: A preparation method of an acid-etched glass with a granular surface structure, comprising the following steps: S1. Add hydrofluoric acid, concentrated sulfuric acid, oxalic acid, ammonium sulfate, ammonium hydrogen fluoride, potassium chloride and glycerol into deionized water in sequence, stir and mix uniformly to prepare a glass acid etching liquid.
[0005] S2. Clean the glass surface to be etched with a water-diluted surfactant; or bombard the glass surface with plasma to remove surface impurities and encapsulate the non-etching surface of the glass.
[0006] S3. Place the cleaned and encapsulated glass in the acid etching liquid; the etching surface forms an angle of 40°-60° with the ground during acid etching; and the acid etching depth is controlled by the acid etching time.
[0007] S4. Take out the acid-etched glass from the acid etching liquid, place it in a supersaturated aqueous solution containing calcium hydroxide, and then take it out and wash it with a large amount of clean water.
[0008] S5. Remove the encapsulating adhesive from the acid-etched glass and perform high-temperature heat treatment.
[0009] Furthermore, the weight percentages of each component in the glass etching solution are as follows: hydrofluoric acid 3%-4.6%, 98% concentrated sulfuric acid 3%-4.6%, oxalic acid 2%-3%, ammonium sulfate ≥5%, ammonium bifluoride 58%-60%, potassium chloride ≥6.5%, glycerol 5%-7%, and deionized water 11%-17.5%.
[0010] Furthermore, the settling time in step S4 is 5 minutes.
[0011] Furthermore, the high-temperature heat treatment involves heating at a temperature not lower than 200°C for 10 minutes.
[0012] Furthermore, if tempering is to be carried out subsequently, high-temperature heat treatment is not required.
[0013] Another objective of this invention is to provide an acid-etched glass with a granular surface structure, prepared by the above method, wherein the size of the film surface structure is 2-5 μm.
[0014] The beneficial effects of this invention are: This invention provides an acid-etched glass with a granular surface structure and its preparation method. Through acid etching solution formulation design and acid etching process, a unique granular surface structure is achieved. The surface structure of the acid-etched glass is dimensionally uniform, without visual differences. The granular structure has smooth protrusions without obvious sharp edges, resulting in a softer and more delicate feel. The obtained acid-etched glass can be used as a cover for touch displays, photovoltaic glass, etc. Attached Figure Description
[0015] The invention will now be further described with reference to the accompanying drawings.
[0016] Figure 1 This is a schematic diagram of the acid etching process of the present invention.
[0017] Figure 2 This is a glass surface morphology diagram after acid etching treatment according to Embodiment 1 of the present invention.
[0018] Figure 3 This is a glass surface morphology diagram after acid etching treatment according to Embodiment 2 of the present invention. Detailed Implementation
[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.
[0020] Example 1 A method for preparing acid-etched glass with a granular surface structure includes the following steps: S1. Preparation of glass etching solution. Add hydrofluoric acid, concentrated sulfuric acid, oxalic acid, ammonium sulfate, ammonium bifluoride, potassium chloride, and glycerol sequentially to deionized water. The weight percentages of each component in the glass etching solution are: hydrofluoric acid (3%), 98% concentrated sulfuric acid (3%), oxalic acid (2%), ammonium sulfate (5%), ammonium bifluoride (58%), potassium chloride (6.5%), glycerol (7%), and deionized water (15.5%).
[0021] S2. Clean the etched surface of the glass with a surfactant diluted with water to remove surface contaminants. Then, seal the non-etched side of the glass on one side.
[0022] S3. Immerse the encapsulated glass in the etching solution. During the etching process, the etched surface should be at a 40° angle to the ground (e.g., ...). Figure 1 (As shown). The etching time was 15 minutes.
[0023] S4. After removing the etched glass from the etching solution, immerse it in a supersaturated aqueous solution containing calcium hydroxide and let it stand for 5 minutes. Then rinse it thoroughly with plenty of water.
[0024] S5. After removing the encapsulating adhesive from the etched glass, place it in a muffle furnace and heat-treat at 200°C for 10 minutes. Allow it to cool naturally to room temperature. The morphology of the etched surface of the sample is as follows. Figure 2 .
[0025] Example 2 A method for preparing acid-etched glass with a granular surface structure includes the following steps: S1. Preparation of glass etching solution. Add hydrofluoric acid, concentrated sulfuric acid, oxalic acid, ammonium sulfate, ammonium bifluoride, potassium chloride, and glycerol sequentially to deionized water. The weight percentages of each component in the glass etching solution are: hydrofluoric acid (4.6%), 98% concentrated sulfuric acid (4.6%), oxalic acid (3%), ammonium sulfate (5%), ammonium bifluoride (60%), potassium chloride (6.5%), glycerol (5%), and deionized water (11.3%).
[0026] S2. Clean the etched surface of the glass with a surfactant diluted with water to remove surface contaminants. Then, seal the non-etched side of the glass on one side.
[0027] S3. Immerse the sealed glass in the etching solution. During etching, the etched surface should be at a 60° angle to the ground. The etching time is 20 minutes.
[0028] S4. After removing the etched glass from the etching solution, immerse it in a supersaturated aqueous solution containing calcium hydroxide and let it stand for 5 minutes. Then rinse it thoroughly with plenty of water.
[0029] S5. After removing the encapsulating adhesive from the etched glass, place it in a muffle furnace and heat-treat at 200°C for 10 minutes. Allow it to cool naturally to room temperature. The morphology of the etched surface of the sample is as follows. Figure 3 .
[0030] The above detailed embodiments provide a specific description of the analytical methods involved in this invention. It should be noted that the above description is only intended to help those skilled in the art better understand the methods and ideas of this invention, and is not intended to limit the scope of the invention. Without departing from the principles of this invention, those skilled in the art can make appropriate adjustments or modifications to this invention, and such adjustments and modifications should also fall within the protection scope of this invention.
Claims
1. A method for preparing acid-etched glass with a granular surface structure, characterized in that, Includes the following steps: S1. Add hydrofluoric acid, concentrated sulfuric acid, oxalic acid, ammonium sulfate, ammonium bifluoride, potassium chloride, and glycerol to deionized water in sequence, stir and mix evenly to prepare glass etching solution; S2. Clean the surface of the glass to be etched and seal the non-etched surface of the glass on one side; S3. Place the cleaned and sealed glass into the etching solution; during the etching process, the etched surface should be at a 40°-60° angle to the ground; control the etching depth by the etching time. S4. Remove the etched glass from the acid etching solution, place it in a supersaturated aqueous solution containing calcium hydroxide and let it stand, then remove it and rinse it with plenty of water; S5. Remove the encapsulating adhesive from the acid-etched glass and perform high-temperature heat treatment.
2. The method for preparing acid-etched glass with a granular surface structure according to claim 1, characterized in that, The weight percentages of each component in the glass etching solution are as follows: hydrofluoric acid 3%-4.6%, 98% concentrated sulfuric acid 3%-4.6%, oxalic acid 2%-3%, ammonium sulfate ≥5%, ammonium bifluoride 58%-60%, potassium chloride ≥6.5%, glycerol 5%-7%, and deionized water 11%-17.5%.
3. The method for preparing acid-etched glass with a granular surface structure according to claim 1, characterized in that, The cleaning methods in step S2 include: cleaning with a surfactant diluted with water or using plasma bombardment.
4. The method for preparing acid-etched glass with a granular surface structure according to claim 1, characterized in that, The settling time in step S4 is 5 minutes.
5. The method for preparing acid-etched glass with a granular surface structure according to claim 1, characterized in that, The high-temperature heat treatment described in step S5 involves heating at a temperature not lower than 200°C for 10 minutes.
6. The method for preparing acid-etched glass with a granular surface structure according to claim 1, characterized in that, In step S5, the encapsulating adhesive on the acid-etched glass is removed, and the glass is then directly tempered.
7. An acid-etched glass with a granular surface structure, characterized in that, It is prepared according to any one of claims 1-6.
8. The acid-etched glass with a granular surface structure according to claim 7, characterized in that, The size of its membrane surface structure is 2-5 μm.