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CN-121990767-A - Frosting powder for soft light display screen glass and preparation method thereof

CN121990767ACN 121990767 ACN121990767 ACN 121990767ACN-121990767-A

Abstract

The invention relates to the technical field of frosting powder preparation and discloses frosting powder for soft light display screen glass and a preparation method thereof, wherein the frosting powder comprises 1-3 parts of ferric trichloride, 5-7 parts of solid citric acid, 10-14 parts of solid ammonium bifluoride, 2-4 parts of barium sulfate and 2-4 parts of solid acetylated monobasic phosphate. The frosting powder for the soft light display screen glass completely abandons the use of liquid strong inorganic acids such as hydrochloric acid, hydrofluoric acid and the like by innovatively constructing a reaction system with water and specific solid acid/salt as cores, so that the serious corrosion of strong acid to production equipment is thoroughly eliminated, the service life of the equipment is prolonged, the safety risks and the environmental pollution problems caused by acid mist volatilization, strong acid storage and transportation are eliminated from the source, the production process is safer and more environment-friendly, and the special proportion combination of ferric trichloride, solid citric acid, ammonium bifluoride, barium sulfate and acetylated monobasic phosphate is adopted to cooperatively act on the surface of the glass, and the formula can form a uniform and fine microcrystalline structure in the etching process.

Inventors

  • HOU YUZHU
  • ZHANG CHENG
  • LI JUNXIU
  • CHEN XIBIN
  • WANG CHAO
  • LI CHENGYONG
  • HUO PEI

Assignees

  • 江苏华玻光电技术有限公司

Dates

Publication Date
20260508
Application Date
20251231

Claims (9)

  1. 1. The frosting powder for the soft light display screen glass is characterized by comprising, by weight, 1-3 parts of ferric trichloride, 5-7 parts of solid citric acid, 10-14 parts of solid ammonium bifluoride, 2-4 parts of barium sulfate and 2-4 parts of solid acetylated monobasic phosphate.
  2. 2. The frosting powder for soft display screen glass according to claim 1, wherein the content of the effective component of the solid citric acid is more than 98%; And/or the fineness of the barium sulfate is not lower than 2000 meshes.
  3. 3. A method of preparing the frosting powder for soft display glass of claim 1 or 2, comprising the steps of: s1, mixing ferric trichloride with water, stirring and dissolving to obtain a base solution; S2, sequentially adding solid ammonium bifluoride, solid citric acid, barium sulfate and solid acetylated monobasic phosphate into the base solution, and continuously stirring and mixing; s3, stirring and curing the mixed material obtained in the step S2 at the temperature of 60+/-3 ℃ at the speed of 180-200 rpm for 5-8 hours to obtain a pasty intermediate; And S4, continuously stirring and curing the pasty intermediate at 50-55 ℃ for 10-14 hours to obtain the frosting powder.
  4. 4. The method of claim 3, wherein the water is added in an amount sufficient to uniformly disperse all the solid components in the subsequent step and to finally form a usable frosting system in the step S1.
  5. 5. A method of treating glass with a frosting powder for soft display glass according to claim 1 or 2, comprising the steps of: y1, mixing the frosting powder with water, curing to prepare uniform frosting working solution; Y2, cooling the frosting working solution and keeping the temperature to 30+/-2 ℃ and placing the frosting working solution in a circulation system; y3, pumping the frosting working solution into a U-shaped groove with an open top, and overflowing from one side of the U-shaped groove to form a continuous stable waterfall-shaped liquid curtain; y4, enabling a surface to be etched of the glass to be processed to face the liquid curtain, and enabling the surface to be etched of the glass to pass below the liquid curtain at a constant speed of 2-4 m/min; And Y5, cleaning, polishing and drying the etched glass.
  6. 6. The method of treating glass with a frosting powder according to claim 5, wherein in Y1, the aging is performed at 50 to 55℃until the frosting working liquid is uniformly stable.
  7. 7. The method of treating glass with frosting powder according to claim 6, wherein the stirring device is provided in the circulation system in Y2 and Y3, the stirring rate is controlled to 300-350 rpm, and the flow rate pumped into the U-shaped tank is controlled to 7000-9000 l/hr.
  8. 8. The method of claim 7, wherein the total distance of the glass to be treated passing through the curtain in Y4 is 10 to 14 m.
  9. 9. A soft display glass obtainable by the process of any one of claims 5 to 8, having a surface gloss of 20±5GU, a surface roughness Ra of 0.2 to 0.3 μm and a transmission haze of 25 to 35%.

Description

Frosting powder for soft light display screen glass and preparation method thereof Technical Field The invention relates to the technical field of frosting powder preparation, in particular to frosting powder for soft display screen glass and a preparation method thereof. Background With rapid development and consumption upgrade of display technology, visual health and comfort experience of electronic products such as liquid crystal display screens and vehicle-mounted touch screens are becoming an increasingly focused attention. The traditional smooth display screen glass has the defects of high surface reflectivity, easy glare caused by interference of ambient light, easy visual fatigue caused by long-time viewing and the like. In order to improve the situation, the glass surface is usually etched by adopting a frosting process, so that the glass has soft light and anti-dazzle functions, and the purposes of soft display and eye protection are achieved. However, the existing frosting powder and process suitable for display screen glass still have a plurality of technical bottlenecks in meeting the requirements of high-performance soft light display: Firstly, the environment protection and the production safety are obviously deficient, a plurality of frosting formulas still need to rely on liquid strong inorganic acids such as hydrochloric acid, hydrofluoric acid and the like as key reaction mediums for realizing effective glass etching, the strong acids have extremely strong corrosiveness and volatility, the loss of production equipment is serious, the service life of the production equipment is shortened, and the safety risks are larger in the storage, transportation and use links, meanwhile, the volatilization of acid mist and the discharge of acid-containing waste liquid also cause burden to the operation environment and the ecological environment, and the development trend of the current green manufacturing is not met; Moreover, the cooperative control capability on key optical performance of the product is weak, a piece of high-quality soft display screen glass needs to have multiple optical parameters such as surface glossiness, microcosmic roughness, light transmission haze and the like matched in a specific precision range, perfect unification of 'soft vision' and 'smooth touch feeling' can be realized, the existing general frosting powder technology is often focused on improvement of etching rate or single roughness index, accurate and stable cooperative regulation and control on parameters such as glossiness, haze and the like are difficult, so that the product performance fluctuation is large, the yield is low, and the uniformity of display effect is poor; And the process suitability is poor, the universality is lacking, and different display screen glass substrates (such as high-alumina glass, soda lime glass and the like) have different sensitivity to etching due to the difference of chemical components, the prior art often needs to develop special frosting powder aiming at specific glass materials, and when glass varieties are switched in production, the formula and the process parameters are required to be readjusted, the process is tedious and time-consuming, a large amount of debugging waste materials and waste liquid can be generated, the production efficiency is reduced, and the environmental protection treatment cost and the material loss are increased. Therefore, there is an urgent need in the art to develop a novel frosting powder and a matching process thereof, which can thoroughly abandon the use of strong acid to promote safety and environmental protection, can precisely and cooperatively control multiple optical performance indexes to meet high-end display requirements, and has excellent universality to adapt to various mainstream glass substrates, thereby meeting the increasing demands of markets on high-performance soft display screen glass. Disclosure of Invention The invention is provided in view of the problems that the prior art has obvious defects in environmental protection and production safety, has weak cooperative control capability on key optical performance of products, has poor process suitability and lacks versatility, and different display screen glass substrates such as high-alumina glass, soda-lime glass and the like have different sensitivity to etching due to the difference of chemical components. Therefore, the invention aims to provide the frosting powder for the soft light display screen glass, which can thoroughly abandon the use of strong acid to promote safety and environmental protection, can precisely and cooperatively control a plurality of optical performance indexes to meet high-end display requirements, has excellent universality to adapt to various main stream glass substrates, and further meets the increasing demands of markets on high-performance soft light display screen glass. The technical scheme is that the frosting powder for soft light displ