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Chemically strengthened glass, float glass raw sheet, and preparation method and production line of float glass raw sheet

A float glass and production line technology, applied in coating and other directions, can solve the problems of insufficient precision, unfavorable environmental protection, increased production cost, etc., and achieve the effect of small warpage and increased difficulty

Inactive Publication Date: 2020-08-28
LILING KIBING ELECTRONIC GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, after the glass is strengthened and then ground, the production cost increases, and more polishing waste liquid will be generated, which is not conducive to environmental protection; the cooling rate of the glass air surface and the tin liquid surface during the annealing process is adjusted by blasting, due to insufficient precision, limited ability to adjust

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0023] The preparation method of described float glass original sheet comprises:

[0024] (1) Prepare the sol for coating;

[0025] (2) atomizing the coating sol into an aerosol by an atomizing device;

[0026] (3) In a mixer, the aerosol is mixed with clean compressed air to obtain a mixed gas;

[0027] (4) passing the mixed gas into the coating device, and the coating device sprays the mixed gas on the air surface of the float glass; the coating device is located on the annealing kiln of the float glass production line;

[0028] (5) After annealing, cooling, cutting and other processes, the original piece of float glass coated with a film is obtained.

[0029] Coating sol is configured according to actual production requirements. The coating sol includes one or more of aluminum hydroxide sol, silica sol, and the like. The solid content of the coating sol is less than 15wt%, and the particle size of the particles is below 0.1 μm, which facilitates the atomization device t...

Embodiment 1

[0040] The aluminum hydroxide sol with a solid content of 13 wt% is atomized through an atomizing device to obtain an aerosol. Mix in the mixer according to the ratio of compressed air: aerosol = 6:1 (gas molar ratio), the mixing time is more than 1h, and the mixing temperature is 200°C. According to a certain flow rate, it is passed into the coating device in the annealing kiln. The device sprays the mixed gas on the air surface of the float glass. The time for the float glass to stay at the coating device is 5s. The temperature in the area where the coating device is located is 600°C. After annealing, cooling, cutting and other processes, the coated float glass is obtained. Original film.

[0041] The original float glass is processed into 5.5-inch 2D cover glass. After cleaning, it is chemically strengthened. The time is 5h, the annealing start temperature is 380°C, and the furnace is cooled and annealed. After chemical strengthening, the product air surface CS: 824MPa, D...

Embodiment 2

[0043] The aluminum hydroxide sol with a solid content of 14 wt% is atomized through an atomizing device to obtain an aerosol. Mix in the mixer according to the ratio of compressed air: aerosol = 8:1 (gas molar ratio), the mixing time is more than 1h, and the mixing temperature is 200°C. According to a certain flow rate, it is passed into the coating device in the annealing kiln. The device sprays the mixed gas on the air surface of the float glass. The time for the float glass to stay at the coating device is 5s. The temperature in the area where the coating device is located is 600°C. After annealing, cooling, cutting and other processes, the coated float glass is obtained. Original film.

[0044]The original float glass is processed into 5.5-inch 2D cover glass. After cleaning, it is chemically strengthened. The time is 5h, the annealing start temperature is 380°C, and the furnace is cooled and annealed. After chemical strengthening, the product air surface CS: 828MPa, Do...

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Abstract

The invention discloses chemically strengthened glass, a float glass raw sheet, and a preparation method and a production line of the float glass raw sheet. The preparation method of the float glass raw sheet comprises the following steps: (1) preparing sol for film coating; (2) atomizing the sol for film coating into aerosol through an atomizing device; (3) mixing the aerosol with clean compressed air in a mixer to obtain mixed gas; (4) introducing the mixed gas into a coating device, and spraying the mixed gas to the air surface of the float glass by the coating device; and (5) annealing, cooling, cutting and the like to obtain the coated float glass raw sheet. The air surface float glass raw sheet prepared by the preparation method is coated with a layer of inorganic oxide film, so theion exchange capacity of the air surface is reduced, the ion exchange capacity of the air surface tends to be consistent with that of a tin liquid surface, and the stress strength of the air surface tends to be consistent with that of the tin liquid surface of the chemically strengthened glass obtained by strengthening under the same condition, thereby the glass is small in warping degree or freeof warping.

Description

technical field [0001] The invention relates to the field of glass, in particular to a chemically strengthened glass, a float glass original sheet, a preparation method and a production line thereof. Background technique [0002] In recent years, electronic information products such as tablet computers, smart phones, and car screens have basically become displays with touch panels. There is a layer of protective glass on the outermost layer of the display, also known as cover glass. At present, the method of increasing the mechanical properties of the cover glass is mainly the low-temperature ion exchange chemical strengthening method. + ) is also a large monovalent cation (such as K + ), and glass surface alkali ions (such as Na + ) exchange, so that cations with large ionic radius (such as K + ) into the glass surface, forming a certain stress intensity and stress depth on the glass surface. [0003] When the float glass is formed, one side of the glass is in contact w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/245C03C21/00C03B25/00
CPCC03B25/00C03C17/002C03C17/245C03C21/00C03C2217/213C03C2217/214
Inventor 熊圣安王海雄聂江宁任亚军
Owner LILING KIBING ELECTRONIC GLASS CO LTD