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Blackening solution for metal grid, its blackening method, metal grid and touch screen

A metal mesh and blackening technology, applied in metal material coating process, input/output process of data processing, instruments, etc., can solve problems such as affecting the conductivity of metal, reducing reflectivity and brightness, and general extinction effect. , to achieve a good shadow removal effect, reduce brightness and reflectivity, and achieve a good shadow removal effect

Active Publication Date: 2021-02-26
LENS TECH CHANGSHA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And this kind of blackening layer is coated, which belongs to the physical blackening method. The process of blackening the metal grid with this physical blackening method is relatively cumbersome, but the metal is blocked by the blackening layer to reduce the reflectivity and Brightness, shadow removal effect is average, it is easy to affect the metal conductivity

Method used

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  • Blackening solution for metal grid, its blackening method, metal grid and touch screen
  • Blackening solution for metal grid, its blackening method, metal grid and touch screen
  • Blackening solution for metal grid, its blackening method, metal grid and touch screen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0114] A blackening medicinal solution, which is composed of the following components in mass percentage: 2% of selenous acid, 4.5% of sodium persulfate, 0.1% of copper sulfate, 0.1% of sodium gluconate and 93.3% of water.

[0115] The method for blackening the copper metal grid with the above-mentioned blackening liquid comprises the following steps:

[0116] (1) Soak the copper metal grid in the above-mentioned blackening liquid at a temperature of 15°C for 60s;

[0117] (2) Wash the metal grid with water after soaking, the washing temperature is 30°C, and the washing time is 60s;

[0118] (3) Dry the washed metal grid at a drying temperature of 65° C. and a drying time of 4 minutes.

[0119] The brightness L*, reflectance Y value and channel impedance of the entire metal before and after blackening are shown in Table 1 below.

[0120] Table 1 Example 1 The brightness and conductivity of the entire metal before and after blackening

[0121]

Embodiment 2

[0123] A blackening medicinal liquid, which is composed of the following components in mass percentage: 0.2% of selenous acid, 1% of sodium persulfate, 0.2% of copper sulfate, 0.2% of sodium gluconate and 98.4% of water.

[0124] The method for blackening the copper metal grid with the above-mentioned blackening liquid comprises the following steps:

[0125] (1) Soak the copper metal grid in the above-mentioned blackening liquid at a temperature of 35°C for 5s;

[0126] (2) Wash the metal grid with water after soaking, the washing temperature is 40°C, and the washing time is 30s;

[0127] (3) Dry the washed metal grid at a drying temperature of 55° C. and a drying time of 6 minutes.

[0128] The brightness L*, reflectance Y value and channel impedance of the entire metal before and after blackening are shown in Table 2 below.

[0129] Table 2 Example 2 The brightness and conductivity of the entire metal before and after blackening

[0130]

Embodiment 3

[0132] A blackening medicinal liquid, which is composed of the following components in mass percentage: 0.05% of selenous acid, 0.1% of sodium persulfate, 1% of copper sulfate, 0.01% of sodium gluconate and 98.84% of water.

[0133] The method for blackening the copper metal grid with the above-mentioned blackening liquid comprises the following steps:

[0134] (1) Soak the copper metal grid in the above-mentioned blackening liquid at a temperature of 25°C for 30s;

[0135] (2) Wash the metal grid with water after soaking, the washing temperature is 35°C, and the washing time is 45s;

[0136] (3) Dry the washed metal grid at a drying temperature of 60° C. and a drying time of 5 minutes.

[0137] The brightness L*, reflectance Y value and channel impedance of the entire metal before and after blackening are shown in Table 3 below.

[0138] Table 3 Example 3 The brightness and conductivity of the entire metal before and after blackening

[0139]

[0140]

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Abstract

The invention discloses a blackening chemical solution for metal grids, a blackening method thereof, a metal grid and a touch screen, and relates to the technical field of metal grids. The blackening medicinal solution comprises the following components in mass percentage: 0.05-5% of selenous acid, 0-10% of persulfate, 0.01-1% of stabilizer, 0.01-1% of inhibitor, and the rest is water. The blackening method of the metal grid uses the blackening liquid to soak the metal grid. The invention alleviates the defects that the current physical blackening method of coating the blackening layer is cumbersome, the effect of disappearing is general, and the conductive performance of the metal is easily affected. The blackening medicinal solution of the present invention can not only achieve a good blackening effect through the mutual cooperation of selenous acid, stabilizers and inhibitors, but also significantly reduce the reflectivity and brightness of metals, which is not obvious to the naked eye and achieve the effect of disappearing shadows. After blackening, the circuit is complete and does not affect its electrical conductivity.

Description

technical field [0001] The invention relates to the technical field of metal grids, in particular to a blackening chemical solution for metal grids, a blackening method thereof, a metal grid and a touch screen. Background technique [0002] Metal Mesh technology is a conductive metal mesh pattern formed by pressing on plastic films such as PET by using metal materials such as silver and copper or oxides that are easily available and inexpensive. Its theoretical minimum resistance value can reach 0.1 ohm / square inch, and it has good electromagnetic interference shielding effect. Due to the advantages of high conductivity, high light transmittance, and good anti-interference ability, metal grids have gradually replaced ITO and become the new mainstream of touch screen electrodes. [0003] The metal of the metal grid touch screen is generally copper, silver or aluminum, etc., and the line width is generally 2-5 μm, generally below 5 μm, which is difficult to see with the naked...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/48G06F3/041
CPCC23C22/48G06F3/0412G06F2203/04103
Inventor 饶桥兵周宇峰
Owner LENS TECH CHANGSHA
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