Glass cover plate with starry sky ag effect and preparation method thereof

Abstract

The application provides a glass cover plate with a starry sky AG effect and a preparation method thereof, and the preparation method comprises the following steps: sand blasting a glass cover plate surface to form a micro-pit structure on the glass cover plate surface; and AG etching the glass cover plate surface with the micro-pit structure to form a starry sky texture structure on the glass cover plate surface, so that the glass cover plate with the starry sky AG effect is obtained. The glass cover plate with the starry sky AG effect and the preparation method thereof are characterized in that: the glass cover plate surface is sequentially subjected to sand blasting and AG etching, so that the starry sky texture structure is formed on the glass cover plate surface, and the effect similar to the dark night sky is presented.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material surface treatment, and in particular to a glass cover plate with starry sky AG effect and a preparation method thereof. BACKGROUND

[0002] With the advent of the 5G era, the use of glass cover plates in the mobile phone industry has become mainstream, but the drawbacks of ordinary smooth glass have also emerged, such as fingerprinting, poor scratch resistance, poor hand feeling, etc. In order to solve the drawbacks of ordinary glass, AG processing technology has emerged. AG processing technology is divided into: coating AG, spraying AG and chemical etching AG. Coating AG, also known as dizzy plating, is a kind of atomization plating technology. By micro concave-convex processing on the surface of the polarizer, the purpose of reducing reflected light is achieved. It has high reflectivity to visible light and high reflectivity to infrared light, but the hardness is not high and the writing hand feeling is produced, and the application range is very limited. Spraying AG is to attach a layer of coating on the surface of the glass through a spraying device (spray gun or butterfly atomizer). Although the processing technology is convenient and efficient, the production efficiency is high, and various specifications of AG glass can be easily processed, but the AG layer is easy to fall off due to environmental and use factors, and the AG glass surface has poor wear resistance. Ordinary chemical etching AG is to use strong acid corrosion to produce fine grooves on the surface of the glass, thereby greatly reducing the reflection of the glass surface. Although the treated glass surface has high hardness, long scratch resistance life, good hand feeling and good anti-fingerprint performance, the texture effect can only be limited.

[0003] Considering that the homogenization phenomenon of electronic products on the market is particularly serious, that is, the cover plate appearance structure of the electronic products in the prior art is not much different, causing user aesthetic fatigue. In order to break the deadlock of single product appearance and serious homogenization, and to give the glass cover plate AG effect, the actual complicated process required as supporting technology is obviously far from enough. SUMMARY

[0004] Based on the technical problems existing in the background art, the present application proposes a glass cover plate with starry sky AG effect and a preparation method thereof. The surface of the glass cover plate is sequentially subjected to sand blasting and AG etching treatment, so that the surface of the glass cover plate forms a starry sky texture structure, and presents an effect similar to a dark night sky.

[0005] The preparation method of the glass cover plate with starry sky AG effect proposed by the present application comprises the following steps:

[0006] S1, sandblasting the surface of the glass cover plate to form a micro-pit structure on the surface of the glass cover plate;

[0007] S2, performing AG etching on the glass cover plate surface with the micro-pit structure to form a starry sky texture structure on the glass cover plate surface, to obtain the glass cover plate with the starry sky AG effect.

[0008] Preferably, the sandblasting sand is mixed sand with different particle sizes, and the sand is preferably green silicon carbide with a particle size range of 10-300 μm.

[0009] Preferably, the sandblasting pressure is 0.2-1.0 Mpa, the conveying belt speed is 5-50 MM / s, and the spray gun swing speed is 5-50 MM / s.

[0010] Preferably, the sandblasting on the glass cover plate surface further comprises, before the sandblasting:

[0011] Spraying a photosensitive ink on the glass cover plate surface to form a photosensitive protective layer, exposing and developing the photosensitive protective layer to form a star-shaped pattern photosensitive protective layer.

[0012] Preferably, the sandblasting on the glass cover plate surface specifically comprises:

[0013] Sandblasting the glass cover plate surface with the star-shaped pattern photosensitive protective layer to form a micro-pit structure on the area outside the star-shaped pattern on the glass cover plate surface.

[0014] Preferably, the AG etching on the glass cover plate surface with the micro-pit structure further comprises, before the AG etching: removing the star-shaped pattern photosensitive protective layer on the glass cover plate surface.

[0015] Preferably, the AG etching on the glass cover plate surface with the micro-pit structure specifically comprises: AG etching the glass cover plate in an AG etching solution for a predetermined time.

[0016] Preferably, the AG etching on the glass cover plate surface with the micro-pit structure further comprises, before the AG etching: spraying an acid-resistant protective ink on other glass cover plate surfaces except the micro-pit structure to form an acid-resistant protective layer.

[0017] Preferably, the acid-resistant protective layer has a thickness of 20-25 μm.

[0018] The application further provides a glass cover plate with a starry sky AG effect, which is prepared by the above preparation method.

[0019] The preparation method of the glass cover plate with the starry sky AG effect provided by the application can first form a micro-pit structure with different sizes on the surface of the glass cover plate through sand blasting, and then perform AG etching treatment on the glass surface with the micro-pit structure with different sizes, so that the glass cover plate surface forms a plurality of AG regions respectively presenting star point effect and night sky effect, and the starry sky AG treatment effect of the glass cover plate surface is obtained.

[0020] The preparation method of the glass cover plate with the starry sky AG effect provided by the application can first form a micro-pit structure with different sizes on the surface of the glass cover plate through sand blasting, and then perform AG etching treatment on the glass surface with the micro-pit structure with different sizes, so that the glass cover plate surface forms a plurality of AG regions respectively presenting star point effect and night sky effect, and the starry sky AG treatment effect of the glass cover plate surface is obtained. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The glass cover plate with the starry sky AG effect;

[0022] Figure 2 The glass cover plate with the starry sky AG effect; DETAILED DESCRIPTION

[0023] In the following, the technical solutions of the application will be described in detail through specific embodiments, but it should be clear that these embodiments are provided for illustration, but not to be interpreted as limiting the scope of the application.

[0024] The application provides a glass cover plate with a starry sky AG effect, and a preparation method thereof includes the following steps:

[0025] (1) providing a glass cover plate, spraying acid-resistant protective ink on the back surface of the glass cover plate, and forming an acid-resistant protective layer on the back surface of the glass cover plate after baking and curing;

[0026] In this embodiment, the acid-resistant protective layer is formed on the back surface of the glass cover plate, so that the acid-resistant protection of the back surface of the glass cover plate is realized, and the influence of subsequent acid etching on the back surface of the glass cover plate is avoided;

[0027] In this embodiment, in order to make the acid-resistant protective layer and the glass cover plate adhere more firmly, the baking and curing process can include pre-baking and final baking, pre-baking: 85±5℃ / 7±1min, final baking: 150-180℃ / 30min, so as to ensure that the acid-resistant protective ink can be effectively attached to the glass cover plate; at the same time, in order to ensure that the back of the glass cover plate can withstand subsequent sandblasting and etching liquid erosion, the thickness of the acid-resistant protective layer is selected to be 20-25μm;

[0028] (2) The front surface of the glass cover plate with the acid-resistant protective layer on the back surface is sandblasted to roughen the front surface of the glass cover plate and form a micro-pit structure on the front surface of the glass cover plate;

[0029] In this embodiment, the sand used for sandblasting is mixed sand with different particle sizes, and the impact of sand with different particle sizes on the surface of the glass cover plate is different. When mixed sand with different particle sizes is used for sandblasting, pits with different sizes and different roughness will be formed on the front surface of the glass cover plate. Therefore, when the front surface of the glass cover plate is further subjected to AG etching treatment, different AG etching effects will be formed in different pit areas on the front surface of the glass cover plate;

[0030] In this embodiment, in order to ensure that pits with a certain roughness are formed on the front surface of the glass cover plate, green silicon carbide with a particle size range of 10-300μm is used for sandblasting, the sandblasting pressure is 0.2-1.0Mpa, the conveying belt speed is 5-50MM / s, and the spray gun swing speed is 5-50MM / s;

[0031] (3) The front surface of the glass cover plate with the micro-pit structure is subjected to AG etching, specifically by immersing the glass cover plate in an etching liquid (acidic solution) for a predetermined time, a starry night texture structure is formed on the front surface of the glass cover plate;

[0032] In this embodiment, the front surface of the glass cover plate undergoes a chemical reaction in the etching liquid, and the front surface of the glass cover plate subjected to sandblasting is further eroded. Since the front surface of the glass cover plate subjected to sandblasting has pit structures with different sizes, the etching effect of the etching liquid in the pits with different sizes is also different. Therefore, after a period of etching treatment, AG areas with different sizes and different star point effects and night sky effects will be formed in different areas on the front surface of the glass cover plate, and a starry night AG effect is obtained;

[0033] (4) Finally, the back surface of the glass cover plate needs to be subjected to ink removal treatment to remove the acid-resistant protective layer on the back surface of the glass cover plate, and a glass cover plate with a starry night AG effect is obtained as shown in Figure 1 .

[0034] Referring to Figure 1It can be seen that the glass cover plate obtained in the embodiment has a starry night texture structure on the front surface, and presents a starry night sparkling effect with a plurality of white star points on a dark bottom surface. Compared with the prior art, the starry night texture structure is obtained by directly spraying and AG etching in two steps in the embodiment, and the process is simple and the light and dark contrast effect is obvious.

[0035] Embodiment 2

[0036] The application further provides a glass cover plate with a starry night AG effect, and a preparation method thereof specifically comprises the following steps:

[0037] (1) providing a glass cover plate, and spraying acid-resistant protective ink on the back surface of the glass cover plate, so that an acid-resistant protective layer is formed on the back surface of the glass cover plate after baking and curing;

[0038] In the embodiment, the acid-resistant protective layer is formed on the back surface of the glass cover plate, so that the acid-resistant protection of the surface of the glass cover plate is realized, and the influence of subsequent acid etching on the back surface of the glass cover plate is avoided. At the same time, in order to make the adhesion between the acid-resistant protective layer and the substrate more firm, the baking and curing process comprises pre-baking and final baking, the pre-baking is 85±5℃ / 7±1min, and the final baking is 150-180℃ / 30min. In addition, in order to ensure that the back surface of the glass cover plate can withstand subsequent sandblasting and etching liquid erosion, the thickness of the acid-resistant protective layer can be selected to be 20-25μm.

[0039] (2) spraying photosensitive ink on the front surface of the glass cover plate with the acid-resistant protective layer on the back surface, so that a photosensitive protective layer is formed on the front surface of the glass cover plate after curing;

[0040] In the embodiment, in order to avoid the photosensitive protective layer from falling off or peeling off during subsequent sandblasting treatment, the photosensitive ink can be selected to be photosensitive ink doped with a toughening agent, so that the obtained photosensitive protective layer has high toughness. At the same time, in order to make the adhesion between the photosensitive protective layer and the glass cover plate more firm, the curing temperature is 110-120℃, and the time is 1-2min. In order to enhance the bearing performance of the photosensitive protective layer during subsequent sandblasting treatment, the thickness of the photosensitive protective layer is 2-5μm.

[0041] (3) installing a mask plate on the front surface of the glass cover plate with the photosensitive protective layer on the front surface, and performing exposure and development, so that a star-shaped pattern photosensitive protective layer is formed on the front surface of the glass cover plate;

[0042] In the embodiment, the mask plate covers part of the photosensitive protective layer, and the photosensitive protective film corresponding to the part is a star-shaped pattern. After exposure and development, the photosensitive protective layer not covered by the mask plate is removed, that is, the star-shaped pattern photosensitive protective layer is formed.

[0043] (4) Spraying sand on the front surface of the glass cover plate with the star-shaped patterned photosensitive protective layer to form a micro-pit structure on the unprotected area of the front surface of the glass cover plate, and the protected area is not affected;

[0044] In this embodiment, the sandblasting is a physical erosion of the surface of the glass cover plate by the impact of high-speed sand flow, so as to form a rough structure on the surface of the glass cover plate. In this embodiment, the sand used for sandblasting can be sand of the same particle size, preferably green silicon carbide with a particle size of 10-300 μm. The sandblasting pressure is 0.2-1.0 Mpa, the conveying belt speed is 5-50 MM / s, and the spray gun swing speed is 5-50 MM / s.

[0045] (5) First, remove the photosensitive protective layer on the front surface of the glass cover plate, and then perform AG etching on the front surface of the glass cover plate, that is, immerse the glass cover plate in an etching solution (acidic solution) for a predetermined time to form a starry texture structure on the front surface of the glass cover plate.

[0046] In this embodiment, the photosensitive protective layer on the front surface of the glass cover plate can be removed by a general photoresist removal process. The photoresist removal solution can be a 5% NaOH solution, and the photoresist removal temperature is 50±2℃.

[0047] In this embodiment, the front surface of the glass cover plate undergoes a chemical reaction in the etching solution to form a rough AG treatment effect. Since the glass cover plate was protected by the photosensitive protective layer during the sandblasting process, the protected area was not eroded by sandblasting, while the unprotected area was previously eroded and roughened by sandblasting. Therefore, after etching the glass cover plate without the photosensitive protective layer, the AG treatment effects corresponding to the protected and unprotected areas on the front surface of the glass cover plate are necessarily different. Moreover, since the protected area corresponds to a star-shaped pattern, the resulting glass cover plate finally presents a starry AG effect.

[0048] (6) Finally, perform ink removal treatment on the back surface of the glass cover plate to remove the acid-resistant protective layer on the back surface of the glass cover plate, thereby obtaining a glass cover plate with a starry AG effect as shown in Figure 2 .

[0049] Referring to Figure 2 , it can be seen that in this embodiment, the front surface of the glass cover plate presents a bright and dark contrast effect with multiple stars in the night sky. Compared to the glass cover plate with a starry AG effect obtained by performing different AG treatments on different areas of the front surface of the glass cover plate, this embodiment directly obtains the AG effect by sandblasting and AG etching, which is simple and has a clearer identifiable pattern line between the AG effect areas corresponding to the stars and the night sky.

[0050] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A method for producing a glass cover plate having a starry sky (AG) effect, characterized by, The method comprises the following steps: S1, sandblasting the surface of the glass cover plate to form a micro-pit structure on the surface of the glass cover plate; S2, AG etching the surface of the glass cover plate with the micro-pit structure to form a starry night texture structure on the surface of the glass cover plate, thereby obtaining the glass cover plate with the starry night AG effect; The sandblasting sand is mixed sand with different particle sizes, and the sand is green silicon carbide with a particle size range of 10-300 μm; the sandblasting pressure is 0.2-1.0 Mpa, the conveying belt speed is 5-50 MM / s, and the spray gun swing speed is 5-50 MM / s; The starry night texture structure is a texture structure showing a starry night sparkling effect with multiple white star points on a dark bottom surface; Before the sandblasting of the surface of the glass cover plate, the method further comprises the following steps: spraying a photosensitive ink on the surface of the glass cover plate to form a photosensitive protective layer, exposing and developing the photosensitive protective layer, and forming a star-shaped pattern photosensitive protective layer; The sandblasting of the surface of the glass cover plate with the star-shaped pattern photosensitive protective layer specifically comprises the following steps: sandblasting the surface of the glass cover plate with the star-shaped pattern photosensitive protective layer to form a micro-pit structure on the area outside the star-shaped pattern on the surface of the glass cover plate.

2. The method for preparing the glass cover plate with starry sky AG effect according to claim 1, characterized in that, Before the AG etching of the surface of the glass cover plate with the micro-pit structure, the method further comprises the following step: removing the star-shaped pattern photosensitive protective layer on the surface of the glass cover plate.

3. The method for preparing a glass cover plate with a starry sky AG effect according to claim 1 or 2, characterized in that, The AG etching of the surface of the glass cover plate with the micro-pit structure specifically comprises the following step: immersing the glass cover plate in an AG etching solution for a predetermined time for AG etching.

4. The method for preparing a glass cover plate with a starry sky AG effect according to claim 1 or 2, characterized in that, Before the AG etching of the surface of the glass cover plate with the micro-pit structure, the method further comprises the following step: spraying an acid-resistant protective ink on the other surface of the glass cover plate except the micro-pit structure to form an acid-resistant protective layer; The thickness of the acid-resistant protective layer is 20-25 μm.

5. A glass cover plate having a starry night AG effect, characterized in that The glass cover plate is prepared by the preparation method of any one of claims 1-4.

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