CN114213036A

CN114213036A - AG anti-glare glass and preparation method thereof

Info

Publication number: CN114213036A
Application number: CN202210034115.7A
Authority: CN
Inventors: 葛祖根
Original assignee: Xuzhou Weigu Special Glass Co ltd
Current assignee: Xuzhou Weigu Special Glass Co ltd
Priority date: 2022-01-12
Filing date: 2022-01-12
Publication date: 2022-03-22

Abstract

The invention belongs to the technical field of functional glass, and discloses AG anti-glare glass and a preparation method thereof. The preparation method comprises the following preparation steps: dispersing metal or metal oxide powder into silica sol to obtain a particle coating, spraying the particle coating on the surface of a cleaned and dried glass panel, and heating to 150-180 ℃ for drying and curing treatment to obtain a particle coating; and heating the treated glass panel to 650-850 ℃ for surface pre-pressing treatment, conveying the glass panel subjected to surface pre-pressing treatment to a reaction chamber, controlling the temperature to be 150-700 ℃, vacuumizing, introducing chlorine gas with certain pressure for reaction, and removing metal chloride by vacuum or water washing to obtain the AG anti-glare glass. The preparation method has the advantages of low pollution and high stability, and the obtained AG anti-glare glass does not have the problem of coating or film layer peeling, and has good application prospect.

Description

AG anti-glare glass and preparation method thereof

Technical Field

The invention belongs to the technical field of functional glass, and particularly relates to AG anti-glare glass and a preparation method thereof.

Background

AG Anti-glare glass (Anti-GlareGlass) is a glass whose surface is specially processed. It features that the reflecting surface of original glass is changed into a matte diffuse reflecting surface (with uneven surface). The principle is that the double sides or single side of the high-quality glass sheet is processed by special processing. Compared with common glass, the glass has lower reflectance, and the light reflectivity is reduced from 8% to below 1%. The anti-dazzle glass can improve the visual angle and brightness of a display picture, so that an image is clearer, the color is more gorgeous, and the color is more saturated, thereby obviously improving the display effect. Can be widely used for manufacturing liquid crystal display screens, rear projection televisions, educational machine display screens, mobile phone cover plates, electronic photo frames and instrument display screen panels.

AG anti-glareThe glass mainly comprises three processing technologies, namely spraying AG, coating AG and chemical etching AG. The AG is sprayed to the surface of the glass by a spraying device, and a layer of coating surface is attached to the surface of the glass to achieve the anti-glare effect. The spray coating is applied to the surface of the object to be coated by dispersing into uniform and fine droplets by means of a spray gun or a disc atomizer by means of pressure or centrifugal force. The processing technology has the advantages of convenience and rapidness, high production efficiency and capability of conveniently processing products with different glossiness and haze. For example, patent CN 110615622 a discloses a method for preparing a smooth AG glass. By applying a portion of the anti-glare coating at 1.1-1.3Kg/cm²Spraying the mixture on the surface of glass under atomization pressure to form a first sprayed layer, and then spraying the other part of the anti-glare coating at a pressure of 1.4-1.6Kg/cm²Spraying the mixture on the first spraying layer under the atomizing pressure to form a second spraying layer, and spraying the fluorine-containing mixture on the second spraying layer after curing to obtain the smooth AG glass. However, the coated surface of AG has the defect of easy peeling, and the abrasion resistance thereof needs to be further improved.

The coating AG is an atomization coating technology, and the AG anti-glare film is one of polarizer surface treatments. The surface of the polaroid is subjected to micro concave-convex processing, so that light is prevented from directly entering eyes, and glare and reflection are effectively reduced. For example, patent CN 111892306 a discloses a method for preparing anti-glare coated AG glass. The anti-dazzle coating AG glass has high light transmittance, high strength, high surface hardness and good wear resistance, and the light transmittance of the glass can be obviously improved under the refractive index. However, the processing technology of the coating AG determines that the hardness value is difficult to change, and the coating AG is scratched and accumulated after being used for a period of time, so that the application range of the coating AG is limited.

The chemical etching AG is processed by a special chemical process to change the light-reflecting surface of the original glass into a matte diffuse-reflecting surface. The influence of reflection can be blurred, the reflection degree is reduced besides glare is prevented, and light shadow is reduced. For example, patent CN 106045327 a discloses a method for manufacturing AG anti-glare flat display glass. An AG anti-dazzle flat display glass automatic production line is adopted, and the process flow is as follows: feeding; acid washing; etching; turning over a plate; washing with water; thinning and polishing; washing with water and sucking to dryness; and (5) air drying. By acid washing, impurities adhering to the surface of the glass sheet can be cleaned to obtain a clean glass surface in preparation for acid etching. By the corrosion principle of strong acid, honeycomb-shaped corrosion pits are formed on the surface of the glass, and the surface roughness of the glass is improved. The chemical polishing processing is applied to realize the fine processing control of the acid etching surface of the AG glass, and the DCS control system is used for realizing the full-flow process automation operation, thereby achieving the accurate control of the process parameters and improving the product quality. Patent CN 113788628A discloses a chemical etching production process of AG anti-glare glass panel with hole sites, comprising the following steps: cutting a large AG anti-dazzle glass substrate into small AG anti-dazzle glass substrates in a plurality of customized shapes, processing and forming, processing the small AG anti-dazzle glass substrates into AG anti-dazzle glass substrates with hole positions through CNC (computer numerical control) processing equipment, attaching a protective film, attaching the protective film in a corresponding shape to the AG anti-dazzle glass substrates with the hole positions, polishing the AG anti-dazzle glass substrates through hollow areas of the protective film, silk-screening, tearing off the protective film, and silk-screening and baking the AG anti-dazzle glass substrates with the hole positions to form AG anti-dazzle glass panel finished products. However, chemical etching AG generally requires the use of a highly corrosive or polluting chemical etching solution, which is hazardous or environmentally friendly.

Disclosure of Invention

Aiming at the defects and shortcomings of the prior art, the invention mainly aims to provide a preparation method of AG anti-glare glass. The preparation method of the invention adopts metal or metal oxide particles to replace chemical etching to manufacture honeycomb micropores on the surface of the glass, improves the surface roughness of the glass, and has the advantages of low pollution, high stability and easy adjustment and control of the surface roughness.

Another object of the present invention is to provide an AG anti-glare glass prepared by the above method.

The purpose of the invention is realized by the following technical scheme:

a preparation method of AG anti-glare glass comprises the following preparation steps:

(1) dispersing metal or metal oxide powder in silica sol to obtain metal or metal oxide particle coating;

(2) spraying the metal or metal oxide particle coating obtained in the step (1) on the surface of the cleaned and dried glass panel, heating to 150-180 ℃, and drying and curing to obtain a metal or metal oxide particle coating;

(3) conveying the glass panel treated in the step (2) to a heating furnace, heating to 650-850 ℃, and then performing surface pre-pressing treatment;

(4) and (4) conveying the glass panel subjected to surface pre-pressing treatment in the step (3) to a reaction chamber, controlling the temperature to be 150-700 ℃, vacuumizing, introducing chlorine gas with certain pressure for reaction, and removing metal chloride in vacuum or washing to obtain the AG anti-glare glass.

Further, in the step (1), the metal or metal oxide powder is at least one selected from iron powder, iron oxide powder, aluminum oxide powder, zinc oxide powder, copper oxide powder, magnesium powder and magnesium oxide powder.

Further, the particle size of the metal or metal oxide powder in the step (1) is 0.1 to 1.2 μm.

Further, in the step (1), the mass percentage of the silicon dioxide in the silica sol is 5-10%; the mass percentage of the metal or metal oxide powder dispersed in the silica sol is 15-30%.

The silica sol is mainly used as a dispersion carrier of metal or metal oxide powder, and is suitable for a spraying process, so that a uniform particle coating is formed on the surface of a glass panel; and plays a role in fixing the metal or metal oxide particles in the subsequent drying and curing treatment process.

Further, the cleaning in the step (2) means cleaning with hydrochloric acid and acetone in sequence.

Further, the pressure of the surface pre-pressing treatment in the step (3) is 1-5 MPa.

Further, the pressure of the chlorine gas in the step (4) is 0.1-1 MPa.

Further, the step (4) of introducing the chlorine gas at a certain pressure for reaction refers to introducing a mixed gas of the chlorine gas at a pressure of 0.1 to 1MPa and an inert gas for reaction.

Further, the step (4) of introducing chlorine gas at a certain pressure for reaction refers to introducing a mixed gas of chlorine gas and water vapor at a pressure of 0.1-1 MPa for reaction; the volume ratio of the chlorine to the water vapor is 1: 0.05-0.1. The chlorination reaction of the metal or metal oxide can be obviously promoted by introducing certain water vapor.

AG anti-glare glass is prepared by the method.

The principle of the invention is as follows: metal or metal oxide powder is used as a pore-forming agent, and silica sol is used as a dispersion carrier and a fixing medium of the metal or metal oxide powder to prepare a metal or metal oxide particle coating on the surface of the glass panel. And then heating the glass panel to the softening point temperature of 650-850 ℃, and then performing surface pre-pressing treatment to press metal or metal oxide powder into the surface of the glass panel. And then controlling the temperature below the softening point of the glass to be 150-700 ℃, introducing chlorine gas with certain pressure for chlorination reaction, converting metal or metal oxide powder into metal chloride with low boiling point or water solubility, removing the metal chloride, and forming cellular micropores on the surface of the glass to obtain the AG anti-glare glass with a rough surface structure.

Compared with the prior art, the invention has the beneficial effects that:

(1) the invention adopts metal or metal oxide particles as pore-forming agent to replace chemical etching to manufacture honeycomb micropores on the surface of the glass, improves the roughness of the surface of the glass and has the advantages of low pollution and high stability.

(2) Compared with the existing AG anti-glare glass sprayed and coated with AG, the AG anti-glare glass prepared by the method has no problem of coating or film layer peeling, and has high wear resistance and hardness.

(3) The invention can regulate and control indexes such as glass surface roughness and the like through the particle size of the metal or metal oxide powder, and has the advantages of simplicity and convenience.

(4) The metal chloride generated by the reaction of the invention can be recovered by a vacuum device or an aqueous solution, and the obtained high-purity metal chloride can be further utilized as a functional auxiliary agent.

Detailed Description

The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.

Example 1

The preparation method of the AG anti-glare glass of the embodiment comprises the following preparation steps:

(1) 30 parts by mass of an iron powder having an average particle diameter of 0.1 μm was dispersed in 100 parts by mass of a silica sol having a silica content of 5% to obtain a metal particle coating material.

(2) And (2) spraying the metal particle coating obtained in the step (1) on the surface of the glass panel which is washed and dried by hydrochloric acid and acetone in sequence, and heating to 170-180 ℃ for drying and curing treatment to obtain the metal particle coating.

(3) And (3) conveying the glass panel treated in the step (2) to a heating furnace, heating to 700-720 ℃, and then performing surface pre-pressing treatment under the pressure of 2 MPa.

(4) And (3) conveying the glass panel subjected to surface pre-pressing treatment in the step (3) to a reaction chamber, controlling the temperature to be 280-300 ℃, vacuumizing, introducing a mixed gas of chlorine and water vapor with the pressure of 0.6MPa (the volume ratio of the chlorine to the water vapor is 1:0.06) for reaction, heating to 420-450 ℃ after the reaction is finished, and removing the volatilized ferric chloride in vacuum to obtain the AG anti-glare glass.

Example 2

(1) 25 parts by mass of alumina powder having an average particle diameter of 0.2 μm was dispersed in 100 parts by mass of silica sol having a silica content of 6% to obtain a metal oxide particle coating material.

(2) And (2) spraying the metal oxide particle coating obtained in the step (1) on the surface of the glass panel which is washed and dried by hydrochloric acid and acetone in sequence, and heating to 170-180 ℃ for drying and curing treatment to obtain the metal oxide particle coating.

(3) And (3) conveying the glass panel treated in the step (2) to a heating furnace, heating to 680-700 ℃, and then performing surface pre-pressing treatment under the pressure of 4 MPa.

(4) And (3) conveying the glass panel subjected to surface pre-pressing treatment in the step (3) to a reaction chamber, controlling the temperature to be 460-480 ℃, vacuumizing, introducing a mixed gas of chlorine and water vapor with the pressure of 0.8MPa (the volume ratio of the chlorine to the water vapor is 1:0.08) for reaction, controlling the temperature to be 300-350 ℃ after the reaction is finished, and removing volatilized aluminum chloride in vacuum to obtain the AG anti-glare glass.

Example 3

(1) 20 parts by mass of a zinc oxide powder having an average particle diameter of 0.5 μm was dispersed in 100 parts by mass of a silica sol having a silica content of 6% to obtain a metal oxide particle coating material.

(2) And (2) spraying the metal oxide particle coating obtained in the step (1) on the surface of the glass panel which is washed and dried by hydrochloric acid and acetone in sequence, and heating to 160-170 ℃ for drying and curing treatment to obtain the metal oxide particle coating.

(3) And (3) conveying the glass panel treated in the step (2) to a heating furnace, heating to 720-750 ℃, and then performing surface pre-pressing treatment under the pressure of 3 MPa.

(4) And (3) conveying the glass panel subjected to surface pre-pressing treatment in the step (3) to a reaction chamber, controlling the temperature to be 500-530 ℃, vacuumizing, introducing a mixed gas of chlorine and water vapor with the pressure of 0.8MPa (the volume ratio of the chlorine to the water vapor is 1:0.1) for reaction, and washing to remove zinc chloride after the reaction is finished to obtain the AG anti-glare glass.

Example 4

(1) 18 parts by mass of copper powder having an average particle diameter of 0.8 μm was dispersed in 100 parts by mass of silica sol having a silica content of 8% to obtain a metal particle coating material.

(2) And (2) spraying the metal particle coating obtained in the step (1) on the surface of the glass panel which is washed and dried by hydrochloric acid and acetone in sequence, heating to 150-160 ℃, and drying and curing to obtain the metal particle coating.

(3) And (3) conveying the glass panel treated in the step (2) to a heating furnace, heating to 750-780 ℃, and then performing surface pre-pressing treatment under the pressure of 2 MPa.

(4) And (3) conveying the glass panel subjected to surface pre-pressing treatment in the step (3) to a reaction chamber, controlling the temperature to be 280-300 ℃, vacuumizing, introducing a mixed gas of chlorine and water vapor with the pressure of 1MPa (the volume ratio of the chlorine to the water vapor is 1:0.1) for reaction, and washing to remove copper chloride after the reaction is finished to obtain the AG anti-glare glass.

Example 5

(1) 15 parts by mass of a magnesium oxide powder having an average particle diameter of 1 μm was dispersed in 100 parts by mass of a silica sol having a silica content of 10% to obtain a metal oxide particle coating material.

(2) And (2) spraying the metal oxide particle coating obtained in the step (1) on the surface of the glass panel which is washed and dried by hydrochloric acid and acetone in sequence, and heating to 150-160 ℃ for drying and curing treatment to obtain the metal oxide particle coating.

(3) And (3) conveying the glass panel treated in the step (2) to a heating furnace, heating to 760-800 ℃, and then performing surface pre-pressing treatment under the pressure of 1 MPa.

(4) And (3) conveying the glass panel subjected to surface pre-pressing treatment in the step (3) to a reaction chamber, controlling the temperature to be 200-240 ℃, vacuumizing, introducing a mixed gas of chlorine and water vapor with the pressure of 0.4MPa (the volume ratio of the chlorine to the water vapor is 1:0.05), reacting, and washing with water to remove magnesium chloride to obtain the AG anti-glare glass.

The AG anti-glare glass obtained in the above examples was tested for light transmittance, surface roughness, gloss and haze, and the results are shown in table 1 below.

TABLE 1

	Light transmittance	Surface roughness	Glossiness (60 degree)	Haze degree
					Example 1	82％	0.11μm	45GU	20％
Example 2	79％	0.23μm	38GU	28％
					Example 3	76％	0.56μm	29GU	33％
Example 4	74％	0.89μm	21GU	36％
					Example 5	71％	1.18μm	12GU	42％

As can be seen from the results in Table 1, the AG anti-glare glass with good comprehensive performance can be obtained by adopting the method of the invention. And the indexes such as glass surface roughness and the like can be regulated and controlled through the particle size of the metal or metal oxide powder, and the method has the advantages of simplicity and convenience.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims

1. The preparation method of the AG anti-glare glass is characterized by comprising the following preparation steps:

2. The method according to claim 1, wherein the metal or metal oxide powder in step (1) is at least one selected from the group consisting of iron powder, iron oxide powder, aluminum oxide powder, zinc oxide powder, copper oxide powder, magnesium powder, and magnesium oxide powder.

3. The method of claim 2, wherein the metal or metal oxide powder of step (1) has a particle size of 0.1-1.2 μm.

4. The method for preparing AG anti-glare glass according to claim 1, wherein the silica sol in the step (1) comprises 5 to 10 percent by mass of silica; the mass percentage of the metal or metal oxide powder dispersed in the silica sol is 15-30%.

5. The method for preparing AG anti-glare glass according to claim 1, wherein the cleaning in the step (2) is performed by sequentially using hydrochloric acid and acetone.

6. The method for preparing AG anti-glare glass according to claim 1, wherein the pressure of the surface pre-pressing treatment in the step (3) is 1 to 5 MPa.

7. The method for preparing AG anti-glare glass according to claim 1, wherein the pressure of the chlorine gas in the step (4) is 0.1 to 1 MPa.

8. The method for preparing AG anti-glare glass according to claim 1, wherein the step (4) of introducing chlorine gas under a certain pressure is a step of introducing a mixture of chlorine gas and inert gas under a pressure of 0.1-1 MPa for reaction.

9. The method for preparing AG anti-glare glass according to claim 1, wherein the step (4) of introducing chlorine gas under a certain pressure is a step of introducing a mixture of chlorine gas and water vapor under a pressure of 0.1-1 MPa for reaction; the volume ratio of the chlorine to the water vapor is 1: 0.05-0.1.

10. An AG anti-glare glass, which is prepared by the method of any one of claims 1 to 9.