Glass etching and thinning process

Abstract

The invention relates to a glass etching and thinning process in the technical field of liquid crystal glass processing. The glass etching and thinning process comprises the following steps: step 1, surface cleaning; 2, dispensing and smearing the edge of a to-be-etched glass sheet to form a dispensing layer on the edge, and curing the dispensing layer to form a protective layer; step 3, preparing an etching solution; step 4, putting a to-be-etched raw glass sheet on the etching jig, then transferring the jig into the etching tank, and enabling the raw glass sheet to be vertically downward and completely immersed into the etching liquid for etching and thinning; and step 5, transferring the etched glass into a clear water tank for cleaning, and carrying out dispensing on the edge of the glass through a UV curing adhesive to form a protective layer wrapping the edge of the glass, so that the edge of the glass can be protected in the etching and thinning process of the glass, the edge of the glass is prevented from generating flaws during etching, and the quality of the glass is improved. And the defect that the glass is seriously damaged due to flaws at the edge of the glass is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of liquid crystal glass processing, in particular to a glass etching and thinning process. Background Art

[0002] The glass etching and thinning process is to reduce the thickness of the liquid crystal. Its purpose is to make the product lighter, optimize the optical performance, reduce the stress of the glass, and make it easier to bend.

[0003] The existing glass etching and thinning process will produce defects at the edge of the glass after etching, and the defects at the edge of the glass can easily cause serious damage to the glass. Therefore, in view of these current situations, it is urgent to develop a glass etching and thinning process to meet the needs of practical use. Summary of the invention

[0004] The present invention aims to provide a glass etching and thinning process, which is used to reduce the defect that defects are generated at the edge of the glass after etching and thus cause glass breakage.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A glass etching and thinning process comprises the following steps:

[0007] Step 1: pre-treating the original glass sheet to be etched to clean its surface;

[0008] Step 2: Wrap the glass side with tape, apply glue to the edge of the original glass sheet to be etched to form a glue layer on the edge, and then cure the glue layer to form a protective layer;

[0009] Step 3, preparing an etching solution consisting of 6%-8% hydrofluoric acid, 4%-6% sulfuric acid and 85%-91% water by weight;

[0010] Step 4: Place the original glass sheet to be etched on the etching jig, transfer the jig to the etching tank, and immerse the original glass sheet vertically downward in the etching solution for etching and thinning for 13±3 minutes;

[0011] Step 5: Transfer the etched glass to a clean water tank for cleaning.

[0012] In the above description, as a further solution, a strip-shaped limiting tape is pasted on one side of the glue application location in step 2, and glue is applied at the edge of the limiting tape and the glass original sheet. After the glue application is completed, the limiting tape is peeled off, and then the glue layer is cured to form a protective layer.

[0013] In the above description, as a further solution, the glue-dispensing layer is composed of UV curing glue, and the glue-dispensing layer is cured by irradiating an ultraviolet lamp for 3-10 minutes.

[0014] In the above description, as a further solution, the process of pre-treating the original glass sheet in step 1 is to immerse it in a pre-treatment solution composed of 20% by mass of sodium hydroxide and 80% by mass of water for 11-13 minutes.

[0015] In the above description, as a further solution, in step 3, the order of adding hydrofluoric acid, sulfuric acid and water is water, sulfuric acid, and hydrofluoric acid, and bubbling stirring is required each time the liquid medicine is added.

[0016] In the above description, as a further solution, in step 4, the speed at which the original glass sheet is placed into the etching solution is 10-20 mm / s.

[0017] In the above description, as a further solution, during the glass etching process in step 4, the temperature in the etching tank is maintained at 25-45°C.

[0018] In the above description, as a further solution, during the etching process of step 4, bubbles are evenly blown into the etching solution through a bubbling device.

[0019] In the above description, as a further solution, in step two, the tape can be replaced with ink curing to isolate the side glass from the UV glue, avoiding excessive adhesion of the UV glue or bubbles in the UV glue, which may cause defects on the edge of the glass and the etching process, causing the acid to corrode the glass and cause defects.

[0020] The beneficial effects produced by the present invention are as follows:

[0021] The glass etching and thinning process of the present application has stable corrosion resistance after being cured. The UV curing glue is dispensed at the edge of the glass to form a protective layer wrapped around the edge of the glass. The edge of the glass can be protected during the glass etching and thinning process to prevent defects from occurring at the edge of the glass during etching. At the same time, the curing time is fast and the operation method is convenient. When the protective layer is formed at the edge of the glass, it is not easy to cause damage to the glass. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A flow chart of the steps of a glass etching and thinning process according to the present invention;

[0023] Figure 2 The present invention is a simplified structural diagram of a glass etching and thinning process. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with the embodiments and drawings, and the contents mentioned in the embodiments are not intended to limit the present invention. The present invention is described in detail below in conjunction with the drawings.

[0025] See also Figure 1-2 A glass etching and thinning process specifically implemented therein comprises the following steps:

[0026] Step 1: pre-treating the original glass sheet to be etched to clean its surface;

[0027] Step 2: Apply glue to the edge of the glass sheet to be etched to form a glue layer on the edge, and then solidify the glue layer to form a protective layer;

[0028] Step 3, preparing an etching solution consisting of 6% hydrofluoric acid, 5% sulfuric acid and 89% water by weight;

[0029] Step 4: Place the original glass sheet to be etched on the etching jig, transfer the jig to the etching tank, and immerse the original glass sheet vertically downward in the etching solution for etching and thinning for 14 minutes;

[0030] Step 5: Transfer the etched glass to a clean water tank for cleaning.

[0031] Preferably, a strip-shaped limiting tape is pasted on one side of the glue application location in step 2, and at the same time, the side of the glass is wrapped with tape or cured with ink to isolate the side glass from the UV glue, and the glue is applied at the edge of the limiting tape and the original glass sheet. After the glue application is completed, the limiting tape is peeled off, and the glue layer is cured to form a protective layer. The limiting tape can form neat straight lines to effectively prevent the UV curing glue from being applied to the glass area to be etched, and at the same time, it is avoided that the adhesion of the UV glue is too large or there are bubbles in the UV glue, which will cause defects on the edge of the glass and during the etching process, the acid will corrode the glass, resulting in defects.

[0032] Preferably, the glue-dispensing layer is composed of UV curing glue, and the glue-dispensing layer is cured by irradiating an ultraviolet lamp for 5 minutes.

[0033] Preferably, in step one, the process of pretreating the original glass sheet is to immerse it in a pretreatment solution composed of 20% by mass of sodium hydroxide and 80% by mass of water for 12 minutes to remove dirt and stains on the surface of the original glass sheet, make its surface clean, ensure the appearance of the glass after etching, and avoid the occurrence of white spots and other defects.

[0034] Preferably, in step 3, the order of adding hydrofluoric acid, sulfuric acid and water is water, sulfuric acid, and hydrofluoric acid, and bubbling stirring is required each time the liquid medicine is added.

[0035] In the above description, as a further solution, in step 4, the speed at which the original glass sheet is placed into the etching solution is 10 mm / s.

[0036] Preferably, during the glass etching process in step 4, the temperature in the etching tank is maintained at 27°C.

[0037] Preferably, during the etching process of step 4, bubbles are evenly blown into the etching solution through a bubbling device so that both sides of the glass are evenly etched to ensure uniform thickness.

[0038] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent changes and modifications made to the above embodiments according to the technology of the present invention are within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.

Claims

1. A glass etching and thinning process, characterized in that: The following steps are involved: Step 1: pre-treating the original glass sheet to be etched to clean its surface; Step 2: Wrap the glass side with tape, apply glue to the edge of the original glass sheet to be etched to form a glue layer on the edge, and then cure the glue layer to form a protective layer; Step 3, preparing an etching solution consisting of 6%-8% hydrofluoric acid, 4%-6% sulfuric acid and 85%-91% water by weight; Step 4: Place the original glass sheet to be etched on the etching jig, transfer the jig to the etching tank, and immerse the original glass sheet vertically downward in the etching solution for etching and thinning for 13±3 minutes; Step 5: Transfer the etched glass to a clean water tank for cleaning.

2. A glass etching and thinning process according to claim 1, characterized in that: In step 2, a strip of limiting tape is pasted on one side of the glue application area, and glue is applied at the edge of the limiting tape and the glass original sheet. After the glue application is completed, the limiting tape is peeled off, and then the glue layer is cured to form a protective layer.

3. A glass etching and thinning process according to claim 1, characterized in that: The glue-dispensing layer is composed of UV curing glue, and the glue-dispensing layer is cured by irradiating with an ultraviolet lamp for 3-10 minutes.

4. A glass etching and thinning process according to claim 1, characterized in that: In the step 1, the glass original sheet is pretreated by immersing it in a pretreatment solution composed of 20% by mass sodium hydroxide and 80% by mass water for 11-13 minutes.

5. The glass etching and thinning process according to claim 1, characterized in that: In the step 3, the order of adding hydrofluoric acid, sulfuric acid and water is water, sulfuric acid and hydrofluoric acid, and bubbling and stirring are required each time the liquid medicine is added.

6. The glass etching and thinning process according to claim 1, characterized in that: In the step 4, the speed at which the glass sheet is placed into the etching solution is 10-20 mm / s.

7. The glass etching and thinning process according to claim 1, characterized in that: During the glass etching process in step 4, the temperature in the etching tank is maintained at 25-45°C.

8. The glass etching and thinning process according to claim 1, characterized in that: During the etching process of step 4, bubbles are evenly blown into the etching solution through a bubbling device.

9. The glass etching and thinning process according to claim 1, characterized in that: In step 2, the tape can be replaced by ink curing to isolate the side glass from the UV glue.

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