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Chemical strengthening method for improving falling resistance and surface hardness of glass

A surface hardness and chemical technology, used in the field of improving glass drop resistance and surface hardness, to achieve the effect of high surface hardness, strong drop resistance, and improved service life

Inactive Publication Date: 2020-06-30
CHANGSHU JIAHE DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The limitation of this patent is that the ion exchange only takes place in the shallow layer of the glass

Method used

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  • Chemical strengthening method for improving falling resistance and surface hardness of glass
  • Chemical strengthening method for improving falling resistance and surface hardness of glass
  • Chemical strengthening method for improving falling resistance and surface hardness of glass

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Embodiment Construction

[0012] The present invention is a chemical strengthening method for improving the drop resistance and surface hardness of glass. The specific operation is divided into three steps, which are the glass plate pretreatment process, the first chemical strengthening process and the second chemical strengthening process.

[0013] In the glass plate pretreatment process, the glass needs to be placed in a mixed solution of sulfuric acid and sodium sulfate at a temperature of 50-60°C for 1-2 hours. The original sharp cracks on the glass surface are rounded due to the corrosion of hydrogen ions. When treated with a mixed solution, the hydrogen ions in the solution exchange with the lithium ions and sodium ions in the glass, forming a surface layer rich in hydrogen ions on the glass surface, which promotes ion exchange for subsequent chemical strengthening.

[0014] In the glass plate pretreatment process, it is necessary to use a mixed solution with a ratio (mass fraction) of 6%-10% sul...

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Abstract

The invention discloses a chemical strengthening method for improving the falling resistance and surface hardness of glass, which sequentially comprises the following steps: (1) a glass plate pretreatment process: soaking with an acid solution to passivate cracks on the surface of the glass and perform preliminary ion exchange at the same time; step (2): a first step of chemical strengthening process: infiltrating the glass plate into a molten salt with a specific composition for ion exchange so as to obtain a deeper compressive stress layer; and (3) a second chemical strengthening process: soaking the glass plate in a molten salt with a specific composition to perform ion exchange so as to obtain relatively high surface layer compression stress.

Description

technical field [0001] The invention relates to the field of improving the drop resistance and surface hardness of glass, in particular to a chemical strengthening method for manufacturing. Background technique [0002] With the progress of the times and the popularization of electronic products, tablet products such as monitors, touch screens, and mobile phones have emerged in large numbers and are widely accepted and used by people. At the same time, the pursuit of thinner and lighter cover glass also makes the glass produced by cover glass manufacturers thinner and thinner. However, in order to improve the glass's drop resistance and surface hardness, the cover glass must have a higher thickness under the premise of thinner and lighter. Strength, therefore, requires strengthening the cover glass. However, the traditional low-temperature ion exchange method has been difficult to meet the requirements of drop resistance and surface hardness. [0003] The patent "Glass Sui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C23/00C03C21/00
CPCC03C23/0095C03C21/002
Inventor 张福军瞿述良朱凯迪
Owner CHANGSHU JIAHE DISPLAY TECH CO LTD
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