A glass cover plate with combined ag effect and a method of making the same

Abstract

The application provides a preparation method of a glass cover plate with combined AG effects, comprising the following steps: preparing a glass cover plate, wherein a plurality of AG areas are preset on a to-be-etched surface of the glass cover plate; attaching an acid-proof film on the to-be-etched surface of the glass cover plate, wherein a plurality of tearable areas surrounded by cut marks are formed on the acid-proof film, and the tearable areas correspond to the AG areas on the to-be-etched surface of the glass cover plate one by one; tearing off the film on the tearable areas on the acid-proof film for the first time, etching the AG areas exposed on the to-be-etched surface of the glass cover plate, coating the AG areas with acid-proof ink again to form an acid-proof ink layer after the AG areas form the AG effects; repeating the above operation until the preset AG areas on the to-be-etched surface of the glass cover plate form different AG effects, then tearing off the remaining acid-proof film and removing the acid-proof ink layer, and finally obtaining the glass cover plate with the combined AG effects. The glass cover plate has multiple AG effects and texture effects, and also has a considerable anti-glare effect.

Description

Technical Field

[0001] This invention relates to the technical field of glass cover plates, and more particularly to a glass cover plate with a combined AG effect and its preparation method. Background Technology

[0002] AG glass, also known as anti-reflective glass or anti-glare glass, is a type of glass with a specially processed surface. The characteristic of AG glass is that it transforms the reflective surface of ordinary glass into a matte, non-reflective surface (with an uneven texture). The principle behind this is that one or both sides of a high-quality glass sheet undergo special processing to achieve a significantly lower reflectance compared to ordinary glass, reducing light reflectivity from 8% to below 1%. This technology creates a clear and transparent visual effect, providing viewers with a superior sensory experience.

[0003] The current market suffers from severe homogenization of electronic products, meaning that the appearance and structure of glass covers on existing electronic products are largely similar, leading to aesthetic fatigue among users. To break this deadlock of monotonous and highly homogenized product appearances, and to simultaneously give glass covers a combined AG (Agglomerate) effect, the existing complex manufacturing processes are clearly insufficient. Summary of the Invention

[0004] Based on the technical problems existing in the background technology, the present invention proposes a glass cover plate with combined AG effect and its preparation method. By performing multiple AG etching treatments on the surface of the glass cover plate, the surface of the glass cover plate exhibits a variety of AG effects and texture effects, and also has a considerable degree of anti-glare effect.

[0005] The present invention proposes a method for preparing a glass cover plate with combined AG effect, comprising the following steps: S1. Prepare a glass cover plate. Several AG areas are pre-set on the surface of the glass cover plate to be etched. S2. The acid-resistant film is pasted on the glass cover plate to be etched. Several removable areas surrounded by cuts are formed on the acid-resistant film. The removable areas correspond one-to-one with the AG areas on the glass cover plate to be etched. S3. First, peel off the removable area of ​​the acid-resistant film, and etch the exposed AG area on the glass cover plate to be etched to form the AG effect. Then, apply acid-resistant ink to the AG area to form an acid-resistant ink layer. S4. Once again, peel off the removable area of ​​the anti-acid film and etch the exposed AG area on the glass cover plate to be etched. After forming an AG effect different from the previous one, apply anti-acid ink to the AG area again to form an anti-acid ink layer. S5. Repeat step S4 until different AG effects are formed in the preset AG areas on the glass cover plate to be etched. Then, remove the remaining acid-resistant film and perform a final etching on the glass substrate to be etched. After forming different AG effects, remove the acid-resistant ink layer to obtain the glass cover plate with combined AG effects.

[0006] In this invention, a glass cover is prepared according to a preset pattern effect. Several AG areas are preset on the surface of the glass cover to be etched. An acid-resistant film is precisely cut into several removable areas surrounded by cut lines. The acid-resistant film is then precisely adhered to the glass substrate, acting as a protective mask. The first time, the removable areas of the acid-resistant film are peeled off, exposing the glass substrate to the etching solution. The surface of the glass substrate not protected by the film is etched into a slightly rough surface, forming an AG anti-glare effect. The glass surface below, protected by the acid-resistant film, remains smooth. At this point, the glass surface forms an "AG background" + a "smooth pattern protected by the film." A peelable acid-resistant ink that is easy to remove later is precisely filled into the pattern recesses in the areas where the AG pattern has already been created. The removable areas of the acid-resistant film are peeled off again, exposing the glass substrate to the etching solution. The protected glass substrate surface is then etched into a slightly roughened surface. However, unlike the first etching, a peelable, acid-resistant ink that is easy to remove is used to precisely fill the patterned recesses in the areas where AG (Ag-Enhanced Glass) has already been created. This process is repeated until all the preset AG areas on the glass substrate's etchable surface have formed different AG effects. The remaining acid-resistant protective film is then peeled off, revealing the previously protected, still smooth glass patterned areas. The peelable, acid-resistant ink acts as a second protective mask. At this point, the glass surface forms a combination of "AG areas protected by ink (with patterns)" and "exposed smooth glass areas." Finally, AG chemical etching is performed on the glass. The previously exposed smooth patterned areas (not covered by ink) are etched, becoming AG surfaces. The areas covered by ink (the AG-formed patterns) are protected, maintaining their original AG state. The glass surface now forms a combination of "AG patterns protected by ink" and... The newly formed AG background is then removed using a specific solvent or by physical stripping to thoroughly clean the peelable ink that fills the pattern. Although AG treatment is performed multiple times, subtle differences in etching conditions (such as time and concentration) can be controlled, or the treatment itself can be the same. In this way, subtle or significant differences between the "AG pattern" and the "AG background" are created visually and tactilely.

[0007] Preferably, step S1 further includes: coating all surfaces of the glass cover plate except the surface to be etched with acid-resistant ink to form an acid-resistant ink layer; Preferably, the thickness of the acid-resistant ink layer is 15-25 μm.

[0008] In this invention, by forming an acid-resistant protective layer on the back and four sides of the glass cover, acid-resistant protection is achieved for the non-etched surfaces of the glass cover, thus avoiding the impact on other surfaces of the glass cover during subsequent etching.

[0009] Preferably, in step S2, the acid-resistant film is at least one of polytetrafluoroethylene film, polyethylene film, or polypropylene film; Preferably, the acid-resistant film has several removable areas formed by precision cutting.

[0010] Preferably, in step S2, the acid-resistant film is bonded to the surface of the glass cover plate to be etched using an adhesive.

[0011] Preferably, in steps S3 and S4, the etching solution comprises, by weight, 20-50 parts of fluoride salt, 10-20 parts of acidic compound, 25-30 parts of barium sulfate, 5-15 parts of starch, and 100 parts of water. The fluoride salts include potassium hydrofluoride and ammonium fluoride; the acidic compounds include hydrofluoric acid and nitric acid.

[0012] Preferably, in steps S3 and S4, the raw materials of the acid-resistant ink include: 50-70 wt% polyester acrylate, 10-30 wt% acrylate monomer, 1-10 wt% tackifier, 1-10 wt% photoinitiator, 5-15 wt% filler, and 0.1-1 wt% additives.

[0013] Preferably, the tackifier is obtained by catalytic addition of tetramethylcyclotetrasiloxane, 2-epoxy-4-vinylcyclohexane and dimethylaminoethyl acrylate in a molar ratio of 1:1-2:0.5-1; the photoinitiator includes 4-bromomethylbenzophenone.

[0014] In this invention, since the acid-resistant ink layer is pre-formed in the tearable area of ​​the acid-resistant film, a certain degree of adhesion inevitably forms between the two at the interface. If the adhesion at the interface is strong, when the acid-resistant film is torn off, the acid-resistant ink layer will inevitably be torn off as well, resulting in unclear boundaries of the AG area and a significant reduction in the overall appearance. Therefore, the acid-resistant ink must not only adhere well to the glass cover plate but also not adhere to the film, so as to ensure that the AG area boundary is not affected when the film is torn off. To this end, tetramethylcyclotetrasilane is used... An addition reaction is performed between oxane, 2-epoxy-4-vinylcyclohexane, and dimethylaminoethyl acrylate to obtain a tackifier with epoxy, siloxy, and tertiary amine groups. The epoxy and siloxy groups exhibit excellent compatibility with glass, ensuring good adhesion to the glass cover, but they also have a repulsive effect on the film, thus ensuring no adhesion to the film. The tertiary amine groups can undergo a quaternization reaction with the photoinitiator 4-bromomethylbenzophenone, thereby enabling the tackifier to be well compatible with the polyester acrylate along with the initiator, ensuring that the ink achieves better adhesion to the glass cover surface and no adhesion to the film.

[0015] Preferably, in steps S4 and S5, the different AG effects are achieved by controlling the different concentrations of the etching solution or the different etching times.

[0016] Preferably, in step S5, the reagent for removing the acid-resistant ink layer includes an alkaline solution, specifically a sodium hydroxide or potassium hydroxide solution.

[0017] The present invention also proposes a glass cover plate with combined AG effect, which is prepared by the above preparation method.

[0018] This invention proposes a glass cover plate with combined AG effect and its preparation method. By using a protective mask (first a film, then ink) and multiple AG treatments, a variety of different micro-textures are successfully created on a single glass surface. Compared with traditional methods, the AG styles are more numerous and the patterns are richer. Attached Figure Description

[0019] Figure 1 It is a glass cover with a combined AG effect; Figure 2 This is another type of glass cover that has a combined AG effect. Detailed Implementation

[0020] The technical solution of the present invention will be described in detail below through specific embodiments. However, it should be clearly stated that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0021] Example 1

[0022] Reference Figure 1 This invention proposes a glass cover with a combined AG effect, the preparation method of which specifically includes the following steps: (1) Provide a flat and clean glass as a glass cover plate. Spray anti-acid ink on the back and four sides of the glass cover plate to form an anti-acid ink protective layer. Then, use the front of the glass cover plate as the surface to be etched. There are four pre-set circular AG areas on it. (2) The polyethylene film is precisely attached to the glass cover plate to be etched as an acid-resistant film. Four circular removable areas surrounded by cuts are formed on the acid-resistant film. The size, shape and position of the circular removable areas correspond one-to-one with the AG area on the glass substrate to be etched. (3) First, peel off the film of the four removable areas on the acid-resistant film to expose the four pre-set circular AG areas on the glass cover plate to be etched. Immerse the glass cover plate in the etching solution and remove it after 15 minutes to form an AG effect. The etching solution includes the following by weight: 15 parts potassium hydrofluoric acid, 20 parts ammonium fluoride, 5 parts hydrofluoric acid, 10 parts nitric acid, 25 parts barium sulfate, 10 parts starch, and 100 parts water. (4) Spray acid-resistant ink onto the four circular AG areas on the glass cover plate to be etched to form an acid-resistant ink protective layer; (5) Remove the remaining acid-resistant film to expose the glass cover plate to be etched, except for the four circular AG areas. Then immerse the glass cover plate in the etching solution and leave it for 5 minutes before removing it to form another AG effect. The etching solution includes the following components by weight: 10 parts potassium hydrofluoric acid, 30 parts ammonium fluoride, 10 parts hydrofluoric acid, 5 parts nitric acid, 30 parts barium sulfate, 5 parts starch, and 100 parts water. (6) Immerse the glass cover plate in a 15wt% potassium hydroxide solution and soak it at 80°C for 5 minutes. Thoroughly clean the acid-resistant ink protective layer that fills the four circular AG areas of the glass cover plate to obtain the glass cover plate with the combined AG effect. In this embodiment, the formulation of the acid-resistant ink includes: 60wt% polyester acrylate prepolymer (DSM Agisyn 9771), 10wt% dipropylene glycol diacrylate, 9wt% trimethylolpropane triacrylate, 5wt% tackifier, 5wt% 4-bromomethylbenzophenone, 0.5wt% 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 10wt% talc, 0.3wt% leveling agent (BYK333), and 0.2wt% defoamer (BYK-053). The thickener is prepared by mixing tetramethylcyclotetrasiloxane and Castel platinum catalyst (5000 ppm) for 15 min, then adding 2-epoxy-4-vinylcyclohexane and dimethylaminoethyl acrylate. The molar ratio of tetramethylcyclotetrasiloxane, Castel platinum catalyst, 2-epoxy-4-vinylcyclohexane, and dimethylaminoethyl acrylate is 1:0.01:1.5:0.8. The mixture is heated to 90°C and reacted for 2 h. After cooling to room temperature, activated carbon is added for adsorption for 24 h. The mixture is then filtered and distilled under reduced pressure to obtain the thickener. The acid-resistant ink is prepared by mixing polyester acrylate prepolymer at 50°C and stirring at 300 rpm until uniformly dispersed, while maintaining the temperature. Then, dipropylene glycol diacrylate, trimethylolpropane triacrylate, tackifier, leveling agent, and defoamer are added and mixed at 500 rpm until uniformly dispersed. Finally, 4-bromomethylbenzophenone, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, and talc are added and mixed at 500 rpm until uniformly dispersed. The mixture is then ground for 60 minutes and filtered through a 450-mesh polyester mesh to obtain the acid-resistant ink.

[0023] The glass cover plate with combined AG effect, as observed by the naked eye, has clear boundaries between different AG effect areas, without jagged edges or burrs.

[0024] Example 2

[0025] Reference Figure 2 This invention proposes a glass cover with a combined AG effect, the preparation method of which specifically includes the following steps: (1) Provide a flat and clean glass as a glass cover plate. Spray anti-acid ink on the back and four sides of the glass cover plate to form an anti-acid ink protective layer. Then, use the front of the glass cover plate as the surface to be etched. There are two pre-set aircraft-shaped AG areas on it. (2) The polyethylene film is precisely attached to the glass cover plate to be etched as an acid-resistant film. Two tearable areas in the shape of an airplane surrounded by cuts are formed on the acid-resistant film. The size, shape and position of the tearable areas in the shape of an airplane correspond one-to-one with the AG area on the glass substrate to be etched. (3) First, peel off a removable area of ​​the acid-resistant film to expose a pre-set airplane-shaped AG area on the glass cover to be etched. Then, immerse the entire glass cover in the etching solution to form an AG effect. (4) Spray acid-resistant ink on the aircraft-shaped AG area on the glass cover plate to be etched to form an acid-resistant ink protective layer. (5) Then peel off another removable area of ​​the acid-resistant film to expose another pre-set airplane-shaped AG area on the glass cover plate to be etched. Immerse the entire glass cover plate in the etching solution to form another AG effect. (6) Spray acid-resistant ink on the aircraft-shaped AG area on the glass cover plate to be etched to form another AG effect, and form an acid-resistant ink protective layer. (7) Next, peel off all the remaining acid-resistant film on the acid-resistant film to expose the glass cover plate to be etched, except for the two airplane-shaped AG areas. Then immerse the glass cover plate in the etching solution to form an AG effect different from the two previous ones. (8) Use an alkaline solution to thoroughly clean the acid-resistant ink protective layer that fills the two airplane-shaped AG areas with the glass cover, and you will get the glass cover with the combined AG effect. In this embodiment, the formulation of the acid-resistant ink is the same as in Example 1.

[0026] The glass cover plate with combined AG effect, as observed by the naked eye, has clear boundaries between different AG effect areas, without jagged edges or burrs.

[0027] Comparative Example 1 This comparative example also proposes a glass cover with a combined AG effect, the preparation method of which is the same as in Example 1, except that the formulation of the acid-resistant ink includes: 65wt% polyester acrylate prepolymer (DSM Agisyn 9771), 10wt% dipropylene glycol diacrylate, 9wt% trimethylolpropane triacrylate, 5wt% 4-bromomethylbenzophenone, 0.5wt% 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 10wt% talc, 0.3wt% leveling agent (BYK333), and 0.2wt% defoamer (BYK-053); The acid-resistant ink is prepared by mixing polyester acrylate prepolymer at 50°C and stirring at 300 rpm until uniformly dispersed, while maintaining the temperature. Then, dipropylene glycol diacrylate, trimethylolpropane triacrylate, leveling agent, and defoamer are added and stirred at 500 rpm until uniformly dispersed. Finally, 4-bromomethylbenzophenone, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, and talc are added and stirred at 500 rpm until uniformly dispersed. The mixture is then ground for 60 minutes and filtered through a 450-mesh polyester mesh to obtain the acid-resistant ink.

[0028] When observed with the naked eye, the glass cover plate with the combined AG effect has obvious serrated burrs at the junction of different AG effect areas.

[0029] Twenty glass cover plates with combined AG effect were prepared according to the preparation methods described in Example 1 and Comparative Example 1, respectively. The product yield and the presence of obvious serrations or burrs at the boundaries of different AG effect areas were statistically analyzed. The results are shown in the table below:

[0030] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for preparing a glass cover plate with a combined AG effect, characterized in that, Includes the following steps: S1. Prepare a glass cover plate. Several AG areas are pre-set on the surface of the glass cover plate to be etched. S2. The acid-resistant film is attached to the surface of the glass cover to be etched. Several removable areas surrounded by cuts are formed on the acid-resistant film. The removable areas correspond one-to-one with the AG areas on the surface of the glass cover to be etched. S3. First, peel off the removable area of ​​the acid-resistant film, and etch the exposed AG area on the glass cover plate to be etched to form the AG effect. Then, apply acid-resistant ink to the AG area to form an acid-resistant ink layer. S4. Once again, peel off the removable area of ​​the anti-acid film and etch the exposed AG area on the glass cover plate to be etched. After forming an AG effect different from the previous one, apply anti-acid ink to the AG area again to form an anti-acid ink layer. S5. Repeat step S4 until different AG effects are formed in the preset AG areas on the glass cover plate to be etched. Then, remove the remaining acid-resistant film and perform a final etching on the glass substrate to be etched. After forming different AG effects, remove the acid-resistant ink layer to obtain the glass cover plate with combined AG effects.

2. The method for preparing a glass cover plate with a combined AG effect according to claim 1, characterized in that, Step S1 also includes: coating all surfaces of the glass cover plate except the surface to be etched with acid-resistant ink to form an acid-resistant ink layer; Preferably, the thickness of the acid-resistant ink layer is 15-25 μm.

3. The method for preparing a glass cover plate with a combined AG effect according to claim 1 or 2, characterized in that, In step S2, the acid-resistant film is at least one of polytetrafluoroethylene film, polyethylene film, or polypropylene film; Preferably, the acid-resistant film has several removable areas formed by precision cutting.

4. The method for preparing a glass cover plate with a combined AG effect according to any one of claims 1-3, characterized in that, In step S2, the acid-resistant film is attached to the surface of the glass cover plate to be etched using an adhesive.

5. The method for preparing a glass cover plate with a combined AG effect according to any one of claims 1-4, characterized in that, In steps S3 and S4, the etching solution used includes, by weight, 20-50 parts of fluoride salt, 10-20 parts of acidic compound, 25-30 parts of barium sulfate, 5-15 parts of starch, and 100 parts of water. The fluoride salts include potassium hydrofluoride and ammonium fluoride; the acidic compounds include hydrofluoric acid and nitric acid.

6. The method for preparing a glass cover plate with a combined AG effect according to any one of claims 1-5, characterized in that, In steps S3 and S4, the raw materials of the acid-resistant ink include: 50-70 wt% polyester acrylate, 10-30 wt% acrylate monomer, 1-10 wt% tackifier, 1-10 wt% photoinitiator, 5-15 wt% filler, and 0.1-1 wt% additives.

7. The method for preparing a glass cover plate with a combined AG effect according to claim 6, characterized in that, The tackifier is obtained by catalytic addition of tetramethylcyclotetrasiloxane, 2-epoxy-4-vinylcyclohexane and dimethylaminoethyl acrylate in a molar ratio of 1:1-2:0.5-1; the photoinitiator includes 4-bromomethylbenzophenone.

8. The method for preparing a glass cover plate with a combined AG effect according to any one of claims 1-7, characterized in that, In steps S4 and S5, the different AG effects are achieved by controlling the concentration of the etching solution or the etching time.

9. The method for preparing a glass cover plate with a combined AG effect according to any one of claims 1-8, characterized in that, In step S5, the reagent for removing the acid-resistant ink layer includes an alkaline solution, specifically a sodium hydroxide or potassium hydroxide solution.

10. A glass cover with a combined AG effect, characterized in that, It is prepared by the preparation method described in any one of claims 1-9.

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