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Touch screen silver paste and preparation method thereof

A technology of touch screen and silver paste, which is applied in cable/conductor manufacturing, instrument, electrical digital data processing, etc. It can solve the problems of restricting the development of touch screen, high cost, etc., to ensure the conductivity, improve the hardness and scratch resistance, and the preparation method is simple Effect

Active Publication Date: 2017-05-17
湖南省国银新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the silver content of the common touch screen silver paste in the market is mostly about 72%. However, the high price of silver and the reduction of silver ore resources have greatly restricted the development of the touch screen industry. Therefore, there is an urgent need for conductive materials with more abundant reserves and lower prices to replace them.

Method used

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  • Touch screen silver paste and preparation method thereof

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Effect test

Embodiment 1

[0025] A touch screen silver paste, comprising the following components by weight: 58 g of silver powder, zirconium hydride (ZrH 2 ) 10g, polyester resin 10g, butyl butyrate 20g, nano-silica 2g.

[0026] The preparation method of touch screen silver paste in this embodiment includes the following steps:

[0027] a. Add 10 g of polyester resin to 20 g of butyl butyrate, heat and stir at 75°C for 2 hours, until the polyester resin is completely dissolved, and filter with a 300-mesh filter to remove insoluble matter to obtain an organic carrier;

[0028] b. Take 58 g of silver powder with a particle size of 0.8 to 5 μm and ZrH with a particle size of 3 to 5 μm 2 10g of powder, 2g of nano-silica, added to the organic carrier in step a, uniformly dispersed with a planetary dispersing mixer at 30°C, rolled with a three-roll mill for 10 passes, and then filtered with a 450-mesh filter to remove insoluble matter, Get touch screen silver paste.

Embodiment 2

[0030] A touch screen silver paste, comprising the following components by weight: 53 g of silver powder, zirconium hydride (ZrH 2 ) 15g, polyurethane 10g, diethylene glycol ethyl ether acetate 20g, methyl benzoate 2g.

[0031] The preparation method of touch screen silver paste in this embodiment includes the following steps:

[0032] a. Add 10 g of polyurethane to 20 g of diethylene glycol ethyl ether acetate, heat and stir at 75°C for 2 hours until the polyurethane is completely dissolved, and filter with a 300-mesh filter to remove insoluble matter to obtain an organic carrier;

[0033] b. Take 53 g of silver powder with a particle size of 0.8 to 5 μm and ZrH with a particle size of 3 to 5 μm 2 15g of powder, 2g of methyl benzoate, added to the organic carrier in step a, uniformly dispersed with a planetary dispersing mixer at 30°C, rolled with a three-roll mill for 10 passes, and then filtered with a 450-mesh filter to remove insoluble matter, Get touch screen silver pa...

Embodiment 3

[0035] A touch screen silver paste, comprising the following components by weight: 48 g of silver powder, zirconium hydride (ZrH 2) 20g, polyacrylic acid resin 15g, diethylene glycol methyl ether 25g, polyethylene glycol 5g.

[0036] The preparation method of touch screen silver paste in the present embodiment comprises the following steps:

[0037] a. Add 15 g of polyacrylic acid resin to 25 g of diethylene glycol methyl ether, heat and stir at 70° C. for 2.5 h until the polyester resin is completely dissolved, and filter with a 350-mesh filter to remove insoluble matter to obtain an organic carrier;

[0038] b. Take 48g of silver powder with a particle size of 0.8-5μm and ZrH with a particle size of 3-5μm 2 Add 20g of powder and 5g of polyethylene glycol to the organic carrier in step a, disperse evenly with a planetary dispersion mixer at 35°C, roll 8 passes with a three-roll mill, and then filter with a 500-mesh filter to remove insoluble matter. Get touch screen silver ...

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Abstract

The invention discloses touch screen silver paste and a preparation method thereof. The touch screen silver paste is prepared from the following components in parts by weight: 40-60 parts of silver powder, 10-30 parts of zirconium hydride, 10-15 parts of polymer resin, 15-28 parts of an organic solvent and 2-5 parts of an additive. The preparation method comprises the following steps of firstly preparing an organic carrier; and adding the silver powder, the zirconium hydride and the additive to the organic carrier, fully mixing evenly, rolling by using a three-roll mill, filtering and removing insoluble substances. Through the addition of the zirconium hydride, the powder filling amount of the touch screen silver paste is not reduced while the usage amount of the silver powder is reduced by 15%-30%, the conductivity is ensured, the hardness and the scratch resistance are improved and the cost is reduced; and meanwhile, the touch screen silver paste is simple in preparation method and high in production efficiency. The touch screen silver paste does not contain a harmful heavy metal ion or halogen and meets the environmental protection requirements.

Description

technical field [0001] The invention relates to the technical field of touch screens, in particular to a touch screen silver paste and a preparation method thereof. Background technique [0002] In the 1970s, electronic paste began to rise, and touch screen silver paste came out as the times require. Especially after the touch screen was successfully used on mobile phones, people found that it could save a lot of tedious input steps, simplify the equipment operation interface, and optimize the appearance of the equipment. , which makes the human-computer interaction more convenient and friendly, which greatly increases the amount of touch screen silver paste. At present, the silver content of the common touch screen silver paste on the market is mostly about 72%, and the high silver price and the reduction of silver ore resources greatly restrict the development of the touch screen industry, so there is an urgent need for more abundant reserves and cheaper conductive materia...

Claims

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Application Information

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IPC IPC(8): H01B1/22H01B1/20H01B13/00G06F3/041
CPCG06F3/041H01B1/20H01B1/22H01B13/00
Inventor 陈实
Owner 湖南省国银新材料有限公司
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