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Re-strengthening method for chemical cold-bending thinned surface of aluminosilicate cover plate glass

A cover glass and aluminosilicate technology, which is applied in the field of re-strengthening of chemical cold-bending thinned surface of aluminosilicate cover glass, can solve the problem that glass is not easy to be formed by hot bending.

Active Publication Date: 2021-01-01
FUYAO GLASS IND GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the technical problem that aluminosilicate cover glass is not easy to be bent and formed, here is a method for bending and forming aluminosilicate cover glass without raising the temperature. Specifically, the aluminosilicate cover glass is Plate glass is tempered first and then local chemical thinning is used. For high-alumina glass sheets (thickness below 2.0mm) it is firstly ion-exchanged to achieve the expected chemical strengthening effect, and then local chemical thinning is used, so that The two outer surfaces of the glass substrate have different compressive stresses. Using the principle of stress difference, the glass naturally bends with the stress distribution.

Method used

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  • Re-strengthening method for chemical cold-bending thinned surface of aluminosilicate cover plate glass
  • Re-strengthening method for chemical cold-bending thinned surface of aluminosilicate cover plate glass
  • Re-strengthening method for chemical cold-bending thinned surface of aluminosilicate cover plate glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0161] Effect of heat treatment on CS and DOL on the surface of chemically strengthened glass and the effect of chemical strengthening again:

[0162] This example uses the high-alumina cover glass of Rainbow Special Glass, model Irico CG-01, with a thickness of 1.0mm; uses a standardized strong furnace with built-in potassium nitrate (purity above 99%), the strengthening temperature is 400 ° C, and the temperature holding time is 4 hours After chemical strengthening, use the FSM-6000LE surface stress meter of Orihara Manufacturing Co., Ltd. to measure DOL and CS. The size of the glass sample is 50mmx50mm, and the thickness is 1.0mm. All the glass samples are edge-treated and the edge micro-cracks are eliminated as much as possible. After finishing, the glass sheets are cleaned and dried, and then placed in a chemical strengthening furnace for chemical strengthening.

[0163] During the chemical strengthening process, the glass is soaked in molten potassium nitrate at 400 ° C....

Embodiment 2

[0172] Effects of heat treatment and re-ion exchange on surface compressive stress (CS) and depth of stress layer (DOL) of cold-bent curved glass:

[0173] In this example, the high-alumina cover glass of Rainbow Special Glass, model Irico CG-01, with a thickness of 0.7mm is used; potassium nitrate (purity above 99%) is built in a standardized strong furnace, the strengthening temperature is 400°C, and the temperature holding time is 4 hours After chemical strengthening, use the FSM-6000LE surface stress meter of Orihara Manufacturing Co., Ltd. to measure DOL and CS. The size of the glass sample is 130mmx70mm, and the thickness is 0.7mm. All the glass samples are edge treated and the edge micro-cracks are eliminated as much as possible. After finishing, the glass sheets are cleaned and dried first, and then placed in a chemical strengthening furnace for chemical strengthening.

[0174] During the chemical strengthening process, the glass is soaked in molten potassium nitrate a...

Embodiment 3

[0179] Effects of heat treatment and re-chemical ion exchange on the bow height of high-alumina glass after chemical cold bending:

[0180] In this example, the high-alumina cover glass of Rainbow Special Glass, model Irico CG-01, with a thickness of 0.7mm is used; potassium nitrate (purity above 99%) is built in a standardized strong furnace, the strengthening temperature is 400°C, and the temperature holding time is 4 hours After chemical strengthening, use the FSM-6000LE surface stress meter of Orihara Manufacturing Co., Ltd. to measure DOL and CS. The size of the glass sample is 130mmx70mm, and the thickness is 0.7mm. All the glass samples are edge treated and the edge micro-cracks are eliminated as much as possible. After finishing, the glass sheets are cleaned and dried first, and then placed in a chemical strengthening furnace for chemical strengthening.

[0181] During the chemical strengthening process, the glass is soaked in molten potassium nitrate at 400 ° C. Durin...

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Abstract

The invention belongs to the technical field of glass processing, and particularly relates to a re-strengthening method for a chemical cold-bending thinned surface of aluminosilicate cover plate glass. According to the ultra-thin high-aluminum cover plate glass subjected to chemical cold bending, two surfaces of a glass plate are subjected to chemical strengthening firstly, and one surface of theglass plate is subjected to thinning treatment to form cold-bent glass, so that the surface compressive stress and the stress layer depth of the thinned surface are partially or completely eliminated,and the strengthening effect of the thinned surface is reduced or eliminated; by chemically strengthening the thinned surface again, the thinned surface has higher surface pressure stress and deeperstress layer depth again on the premise of maintaining cold bending of the glass, so that the two surfaces of the cold-bent ultra-thin high-aluminum cover plate glass still have the protection effectof chemical strengthening. According to the method, the aluminosilicate cover plate glass can be applied to appearance protection of automobile instrument display, automobile windows, skylights, display protection cover plates, white household appliances, building glass and other consumer electronics in a curved surface mode.

Description

technical field [0001] The invention belongs to the technical field of glass processing, and in particular relates to a method for restrengthening the chemically cold-bent thinned surface of an aluminosilicate cover glass. Background technique [0002] The lightweight of automotive materials is currently an important topic in the field of automotive material technology development and energy saving and carbon reduction, among which the lightweight of automotive glass is also one of the key points. At present, most of the front windshield and sunroof on the market are made of two physically stiffened soda-lime glass plates sandwiched by a layer of polyvinyl butyral (PVB) film. If the effect of reducing the weight of the glass is achieved by reducing the thickness of the glass without reducing the mechanical properties of the glued glass window combination, it is limited by the strength of the soda-lime glass itself and the physical rigidity required for the thickness of the g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C21/00C03C23/00
CPCC03C21/002C03C23/0085C03C23/0075Y02P40/57
Inventor 丁原杰陈琦
Owner FUYAO GLASS IND GROUP CO LTD
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