Enhancer for touch screen edge enhancing process

Abstract

The invention discloses an enhancer for a touch screen edge enhancing process. The enhancer is prepared by sequentially mixing pure water, 70% sulfuric acid, 70% ammonium fluoride, 49% hydrofluoric acid, 99% acetic acid and 37% hydrochloric acid at the mass ratio of (0.5-0.6) to (1-1.1) to (0.025-0.035) to (0.1-0.2) to (0.02-0.03) to (0.001-0.002), wherein the sulfuric acid can smoothen small scars on the surface of glass and is not easy to volatilize, so that the utilization rate of the enhancer is improved; the hydrofluoric acid mainly functions as etching and is capable of eliminating micro cracks in the glass; ammonium fluoride can take an effect of etching the glass after being mixed with sulfuric acid, and can form a buffer solution together with hydrofluoric acid; acetic acid is conducive to the improvement of the solubility of calcium sulfate and calcium fluoride generated from an reaction between the enhancer and the glass so as to avoid the generation of a precipitate; hydrochloric acid can be used for effectively removing metal impurities included in the glass; and the mixed acid is utilized as the enhancer, so that the problem of metal residue in etching when hydrofluoric acid is merely adopted can be avoided, and the strength of a touch screen is enhanced.

Description

technical field [0001] The invention relates to the field of touch screen production and manufacturing, in particular to a strengthening agent used in the touch screen edge strengthening process. Background technique [0002] The touch screen is made of glass. After cutting and edging a large piece of glass, there will be microcracks on the edge of the glass. The cracks are prone to breakage under the extrusion of external force, resulting in a decrease in the overall strength of the touch screen. At present, there are mainly two methods of physical polishing of high-precision abrasive tools and chemical immersion in hydrofluoric acid to eliminate micro-cracks and achieve the effect of secondary reinforcement. However, physical polishing of high-precision abrasive tools has low efficiency and poor mass productivity, and requires A lot of manpower and machine equipment are costly; at this stage, chemical immersion is mainly preferred, but the glass contains metal impurities i...

AI Technical Summary

Problems solved by technology

[0002] The touch screen is made of glass as a carrier. After cutting and edging a large piece of glass, there will be micro-cracks on the edge of the glass. The cracks are prone to breakage under the extrusion of external force, resulting in a decrease in the overall strength of the touch screen.

At present, there are mainly two methods of physical polishing of high-precision abrasive tools and chemical immersion in hydrofluoric acid to eliminate micro-cracks and achieve the effect of secondary reinforcement. However, physical polishing of high-precision abrasive tools has low efficiency and poor mass productivity, and requires A lot of manpower and machine equipment are costly; at this stage, chemical immersion is mainly preferred, but the glass contains metal impurities in the process of processing, which cannot be effectively removed by hydrofluoric acid etching, and it is easy to form convex bumps, and the strength after strengthening insufficient

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