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Tempered glass and manufacturing method thereof

A technology for strengthening glass and manufacturing methods, applied in the direction of coating, etc., can solve the dilemma of overall strength and safety, and cannot reach the maximum strength, etc., and achieve the effect of strong safety performance

Active Publication Date: 2019-05-14
CHONGQING XINJING SPECIAL GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this approach is that in order to ensure safety and avoid the phenomenon of "self-explosion", the strength of the glass is sacrificed, so the strength of the glass may not meet the requirements of design and use, or cannot reach the maximum strength.
For this kind of tempered glass with uneven thickness, its overall strength and safety become a pair of contradictions and dilemmas

Method used

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  • Tempered glass and manufacturing method thereof
  • Tempered glass and manufacturing method thereof
  • Tempered glass and manufacturing method thereof

Examples

Experimental program
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preparation example Construction

[0038] The method for preparing strengthened glass provided by the present invention mainly includes the following steps:

[0039] Step S1: coating a high temperature resistant protective coating on a part of the glass to be strengthened, and curing the protective coating;

[0040] Step S2: putting the glass to be strengthened into a first ion exchange salt bath for chemical strengthening;

[0041] Step S3: taking out the glass to be strengthened from the first ion exchange salt bath, and cleaning the glass to be strengthened;

[0042] Step S4: removing the protective coating on the glass to be strengthened.

[0043] Because the protective coating in step S1 can prevent or impede ion exchange in the first ion exchange salt bath in the partial region of the glass to be strengthened. Therefore, after the above steps, the depth of the ion exchange layer in the part of the glass to be strengthened must be smaller than the depth of the ion exchange layer in other parts of the gla...

Embodiment 1

[0048] Prepare a sheet of glass to be strengthened with a blind hole in the middle, the thickness of the blind hole area of ​​the glass to be strengthened is 2.1mm, and the thickness of other areas of the glass to be strengthened is basically 2.2mm (error less than 0.04mm).

[0049] Then the glass to be strengthened is processed as follows:

[0050] Step S1, coating the protective coating a on both sides of the blind hole and its surrounding area of ​​5 mm, the protective coating a is required to cover the entire blind hole and the area within 5 mm around the blind hole, and the blind hole The thickness of the protective coating a on the inside of the front is about 35-40 μm, and the thickness of the protective coating a on the back of the blind hole is 15-20 μm, and the protective coating a is cured under certain conditions.

[0051] Step S2, putting the glass to be strengthened into an ion-exchange salt bath a at 420° C. for 120 minutes.

[0052] Step S3, taking out the gla...

Embodiment 2

[0077] Its difference with embodiment 1 only lies in:

[0078] First, in step S2, the glass to be strengthened is placed in an ion-exchange salt bath a at 430° C. for 180 minutes.

[0079] In addition, protective coating b is used instead of said protective coating a. In this embodiment, the difference between the protective coating b and the protective coating a is that the glass 8206 powder is used instead of the glass 8205 powder, wherein the preparation process of the glass 8206 powder is as follows:

[0080] (1) Take the raw materials of each mass ratio according to the formula of each raw material content in the following table, mix and stir evenly;

[0081] raw material

B 2 o 3

ZnO

TiO 2

ZrO 2

Al 2 o 3

MgO

SiO 2

Mass ratio (%)

3.7

4.5

2.3

3.5

11

10

65

[0082] (2) Put it into a crucible and heat it to above 1300°C to make the glass into a molten state;

[0083] (3) Quenching the molte...

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Abstract

The invention discloses tempered glass and a manufacturing method thereof. The surface of a tempered glass product is provided with a compressive surface stress layer formed by an ion exchange method,and different internal tensile stress is distributed in different areas of the tempered glass product. The manufacturing method includes the steps: S1 coating parts of areas of glass to be tempered with high-temperature-resistant protective coating layers, and curing the protective coating layers; S2 placing the glass to be tempered into first ion exchange salt bath to perform chemical strengthening; S3 taking out the glass to be tempered from the first ion exchange salt bath, and cleaning the glass to be tempered; S4 removing the protective coating layers on the glass to be tempered. The protective coating layers are used for preventing or blocking ion exchange of the parts of areas of the glass to be tempered in the first ion exchange salt bath. The tempered glass product can ensure that whole strength meets requirements (namely, whole compressive stress is not too low) and has sufficiently high safety (namely, local tensile stress is not too high).

Description

technical field [0001] The invention relates to the field of glass manufacturing, in particular to a strengthened glass and a manufacturing method thereof. Background technique [0002] Strengthened glass has been widely used in displays, watches, mobile phones, automobiles, and high-speed rail. Generally speaking, the surface compressive stress and internal tensile stress distribution of the same flat tempered glass is uniform and consistent. Usually, in order to ensure the overall strength and safety of strengthened glass, it is necessary to ensure that the surface compressive stress and overall strength of the glass are sufficiently large to meet the needs of use, and to control the internal tensile stress not to be too high. When the internal tensile stress is too large, the strengthened glass will "self-explode", that is to say, the strengthened glass will disintegrate and break by itself. When the thickness of the glass is a definite value, the greater the compressive...

Claims

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Application Information

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IPC IPC(8): C03C21/00
CPCC03C21/002C03C2218/355C03C17/008C03C3/093C03C8/04C03C8/14C03C17/007C03C2217/475C03C2217/48C03C2218/328
Inventor 胡伟谈宝权陈芳华常瑞荆
Owner CHONGQING XINJING SPECIAL GLASS CO LTD
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