Conductive silver paste for touch screen using transfer process and preparation method thereof

A technology of conductive silver paste and touch screen, which is applied in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, circuits, etc., can solve the problems of high manufacturing costs, flat screen printing technology cannot meet three-dimensional printing technology, etc., and achieve The effect of increasing hardness

Active Publication Date: 2019-08-06
SHANGHAI BAOYIN ELECTRONICS MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the implantation of the concept of "full-screen mobile phone", the "frame" that originally required silk screen printing has disappeared, and flat screen printing technology cannot meet the newly developed three-dimensional printing technology. The lines are transferred on the side of the screen to achieve a "borderless" three-dimensional printing effect
In contrast, transfer printing of fine lines puts forward higher requirements for traditional touch screen silver paste, including good thixotropy, silver paste fineness and fast curing ability, and its manufacturing cost is relatively high

Method used

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  • Conductive silver paste for touch screen using transfer process and preparation method thereof
  • Conductive silver paste for touch screen using transfer process and preparation method thereof
  • Conductive silver paste for touch screen using transfer process and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method of conductive silver paste for a transfer printing process touch screen, the method comprising the following steps:

[0024] (1) Preparation of organic carrier: Prepare 100Kg of carrier, weigh 30kg of polyurethane resin, 35kg of ester solvent and 35kg of ketone solvent, stir to wet the resin, then heat it up to 80°C and keep the temperature constant until the resin is completely dissolved. When it is cooled to below 40°C, it is filtered on a 300-400-mesh mesh cloth to obtain an organic carrier.

[0025] (2) Prepare materials, prepare materials according to the following components and contents:

[0026]

[0027] In the metal silver powder used, the particle size is 1.2 μm, and the tap density is 4.8 g / ml;

[0028] (3) Preparation of silver paste: Weigh metal silver powder, mix it with organic carrier, defoamer, wetting agent, anti-orange peel agent, thixotropic agent, hardening agent in a mixer, and then use The high-speed disperser performs hi...

Embodiment 2

[0032] A preparation method of conductive silver paste for a transfer printing process touch screen, the method comprising the following steps:

[0033] (1) Preparation of organic carrier: Prepare 100Kg of carrier, weigh 30kg of polyurethane resin and 70kg of ester solvent, stir to wet the resin, then heat it up to 80°C and keep the temperature constant until the resin is completely dissolved, then cool to below 40°C Filter it on a mesh cloth of 300-400 mesh to remove impurities to obtain an organic carrier.

[0034] (2) Prepare materials, prepare materials according to the following components and contents:

[0035]

[0036] The metal silver powder used had an average particle diameter of 1.5 μm and a tap density of 4.8 g / ml. ;

[0037] (3) Preparation of silver paste: Weigh metal silver powder, mix it with organic carrier, defoamer, wetting agent, anti-orange peel agent, thixotropic agent, hardening agent in a mixer, and then use The high-speed disperser performs high-...

Embodiment 3

[0041] A preparation method of conductive silver paste for a transfer printing process touch screen, the method comprising the following steps:

[0042] (1) Preparation of organic carrier: Prepare 100Kg of carrier, weigh 30kg of saturated polyester resin, 30kg of ester solvent and 40kg of ketone solvent, stir to wet the resin, then heat it up to 80°C and keep the temperature constant until the resin is completely Dissolve it, and when it is cooled to below 40°C, filter it on a 300-400-mesh mesh cloth to obtain an organic vehicle.

[0043] (2) Prepare materials, prepare materials according to the following components and contents:

[0044]

[0045] The metal silver powder used has a particle size of 2 μm and a tap density of 4.0 g / ml;

[0046] (3) Preparation of silver paste: Weigh metal silver powder, mix it with organic carrier, defoamer, wetting agent, anti-orange peel agent, thixotropic agent, hardening agent in a mixer, and then use The high-speed disperser performs h...

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Abstract

The invention relates to conductive silver paste for a touch screen using a transfer process and a preparation method thereof. The method comprises steps of weighing 10-15 parts by weight of polymer resin and 3-20 parts by weight of an organic solvent, heating the polymer resin and the organic solvent to 80 degrees centigrade and keeping the temperature until the resin is completely dissolved, cooling the product below 40 degrees centigrade and then filtering and purifying the product on a 300-400 mesh screen cloth to obtain an organic carrier; weighing 60 to 75 parts by weight of metal silverpowder, fully mixing the metal silver powder, the organic carrier, 0.1-1 parts by weight of antifoaming agent, 0.1-1 parts by weight of wetting agent, 0.1-1 parts by weight of anti-orange peel agent,0-2 parts by weight of thixotropic agent, and 0-1 parts by weight of hardening agent in a mixer, then dispersing the mixture at a high speed by a high-speed disperser to obtain uniform paste; grinding the paste on a three-roll grinder, and controlling, by the fine adjustment of the roller, the fineness of the silver paste to be less than 5 [mu]m and the viscosity of the silver paste to be 30 to 45 Pa.S so as to obtain the conductive silver paste for a touch screen using a transfer process. Compared with the prior art, the conductive silver paste has the advantages of low resistance, good corrosion resistance, good oxidation resistance and the like.

Description

technical field [0001] The invention relates to conductive silver paste, in particular to a conductive silver paste for a touch screen in a transfer printing process and a preparation method thereof. Background technique [0002] Capacitive touch screen technology is a transparent absolute coordinate system, and the data of each touch is converted into coordinates on the screen through calibration data. When the human body touches the capacitive screen, the electric field of the human body, fingers and the working surface will form a coupling capacitance. There is a high-frequency signal connected to the touch screen, and the finger will absorb a small current, which flows out of the electrodes on the four feet of the touch screen, and the current flowing through the four electrodes is theoretically the same as the distance from the finger to the four corners. Proportional, the controller goes through confidential calculations to arrive at the location of the touch point. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/22H01B13/00
CPCH01B1/22H01B13/00
Inventor 江海涵何利娜朱庆明王德龙
Owner SHANGHAI BAOYIN ELECTRONICS MATERIALS CO LTD
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