CN103426497B - A kind of conductive silver paste for touch screens and preparation method thereof - Google Patents
A kind of conductive silver paste for touch screens and preparation method thereof Download PDFInfo
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- CN103426497B CN103426497B CN201310387410.1A CN201310387410A CN103426497B CN 103426497 B CN103426497 B CN 103426497B CN 201310387410 A CN201310387410 A CN 201310387410A CN 103426497 B CN103426497 B CN 103426497B
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Abstract
The present invention relates to conductive silver paste technical field, be specifically related to a kind of conductive silver paste for touch screens and preparation method thereof, it is by silver powder 55-70%, epoxy resin 5-15%, mylar 5-15%, powdered graphite 0.1-1%, SiO 2 powder 1-2%, diethylene glycol ether acetate 5-15%, butyl acetate 5-15% forms, PU modified epoxy vinyl ester resin of the present invention and acrylic type mylar can fully be dissolved in the dicyandiamide solution of butyl acetate and butyl acetate, form organic carrier, there is the silver powder of electric conductivity, can well be disperseed after powdered graphite adds, improve the conductivity of conductive silver paste, PU modified epoxy vinyl ester resin, acrylic type mylar, pulp strength after the employing of SiO 2 powder also makes conductive silver paste sinter is high, good with the adhesive force of substrate, the requirement that the live width of the electrocondution slurry of touch-screen circuit is more and more thinner can be met.
Description
Technical field
The present invention relates to conductive silver paste technical field, be specifically related to a kind of conductive silver paste for touch screens and preparation method thereof.
Background technology
Conductive silver paste refers to and is printed on conduction stock, and making it the silver slurry having conduction current and get rid of accumulate static charge ability, is generally be imprinted on the non-conductive stocks such as plastics, glass, pottery or cardboard.
Japanese patent application publication No. No.2005-251542 discloses a kind of method preparing conductive silver paste, and the nano-silver powder that this conductive silver paste is below 20nm by epoxy resin, flake silver powder and surface-coated by the size of organic material forms.But the composition containing flakelike powder and nanometer powder is difficult to the packed density being increased plain conductor by self.The electrical property that this type of conductive silver paste obtains when carrying out low-temperature sintering is still restricted.
And the live width of the current electrocondution slurry of touch-screen circuit is more and more thinner, but attenuate due to circuit, resistance and sheet resistance increase thereupon, even there will be adhesion bad, broken string, the problem that cannot ensure with the adhesive force of substrate.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, provide one to conduct electricity very well, adhesion is good, conductive silver paste for touch screens that line film-strength is high, good with the adhesive force of substrate and preparation method thereof.
To achieve these goals, the present invention adopts following technical scheme:
A kind of conductive silver paste for touch screens, it is made up of the raw material of following percentage by weight:
Silver powder 55-70%
Epoxy resin 5-15%
Mylar 5-15%
Powdered graphite 0.1-1%
SiO 2 powder 1-2%
Diethylene glycol ether acetate 5-15%
Butyl acetate 5-15%,
The percentage by weight sum of above-mentioned each raw material is 100%.
Wherein, described epoxy resin is PU modified epoxy vinyl ester resin, and PU modified epoxy vinyl ester resin has excellent corrosion resistance, pliability and good process, due to the introducing of carbamate, can keep the air-drying property that resin surface is good.
Wherein, described mylar is acrylic type mylar.
Butyl acetate and butyl acetate are with the use of PU modified epoxy vinyl ester resin and acrylic type mylar being had to excellent dissolubility and evaporation rate slowly, after PU modified epoxy vinyl ester resin and acrylic type mylar are fully dissolved, silver powder and the powdered graphite with electric action could fully incorporate wherein.
Preferably, it is made up of the raw material of following percentage by weight:
Silver powder 55-65%
Epoxy resin 5-15%
Mylar 5-15%
Powdered graphite 0.5-1%
SiO 2 powder 1-1.5%
Diethylene glycol ether acetate 5-8%
Butyl acetate 5-8%,
The percentage by weight sum of above-mentioned each raw material is 100%.
More preferred, it is made up of the raw material of following percentage by weight:
Silver powder 65%
Epoxy resin 10%
Mylar 8%
Powdered graphite 1%
SiO 2 powder 2%
Diethylene glycol ether acetate 7%
Butyl acetate 7%.
Preferably, silver powder is micro-silver powder end and the Nano Silver powder constituent of 1:20-1:30 by mass ratio, and the particle diameter at described micro-silver powder end is 10-20 μm, and the particle diameter of described Nano Silver powder is 60-90nm.Micro-silver powder end in this particle diameter and ratio range and Nano Silver powder can coordinate better, both little quality and the high surface energy of Nano Silver powder can have been utilized, Nano Silver powder is made to be attached to surface, micro-silver powder end, formed core the composite construction of shell, make again in follow-up mixed process, Nano Silver powder is attached to the surface at micro-silver powder end along with moving together at micro-silver powder end, effectively prevent the agglomeration of Nano Silver powder; In addition because Nano Silver powder has high surface energy, the combination of the macromolecular chain in it and epoxy resin and mylar is tightr, therefore micro-silver powder end can by being attached to the combination of the macromolecular chain in the Nano Silver powder on its surface and epoxy resin and mylar, the Nano Silver powder not being attached to surface, micro-silver powder end will be filled into the various gaps of epoxy resin and mylar, final all micro-silver powder ends and Nano Silver powder all obtain dispersed, improve conductivity of the present invention.
Preferably, the particle diameter of described powdered graphite is 20-50 μm, and powdered graphite is micron-sized, and Nano Silver powder also partly can be attached to the surface of powdered graphite, and as a same reason, this also can improve conductivity of the present invention.
Preferably, the particle diameter of described SiO 2 powder is for being 30-80 μm.
A preparation method for conductive silver paste for touch screens, it comprises following preparation process:
Steps A: the epoxy resin of formula ratio, mylar, diethylene glycol ether acetate, butyl acetate are uniformly dispersed, obtain organic carrier;
Step B: the silver powder of formula ratio, powdered graphite, SiO 2 powder are joined organic carrier and be uniformly dispersed, obtains a kind of conductive silver paste for touch screens.
After described step B adopts and first stirs, the mode of ultrasonic vibration is disperseed.
Inventive touch screen conductive silver paste sinters in the temperature range of 100-200 DEG C.
Compared with prior art, beneficial effect is in the present invention:
(1) PU modified epoxy vinyl ester resin of the present invention and acrylic type mylar can fully be dissolved in the dicyandiamide solution of butyl acetate and butyl acetate, form organic carrier, there is the silver powder of electric conductivity, powdered graphite can well be disperseed after adding, improve conductivity of the present invention, it is high, good with the adhesive force of substrate that the employing of PU modified epoxy vinyl ester resin, acrylic type mylar, SiO 2 powder also makes the present invention sinter disposed slurry intensity.
(2) preparation method of the present invention is simple, and production efficiency is high.
Embodiment
Below in conjunction with embodiment, the present invention is further illustrated.
embodiment 1.
A kind of conductive silver paste for touch screens, it is made up of the raw material of following percentage by weight: silver powder 55%, epoxy resin 10%, mylar 13%, powdered graphite 1%, SiO 2 powder 1%, diethylene glycol ether acetate 10%, butyl acetate 10%
Wherein, described epoxy resin is PU modified epoxy vinyl ester resin,
Wherein, described mylar is acrylic type mylar.
Wherein, silver powder is micro-silver powder end and the Nano Silver powder constituent of 1:20 by mass ratio, and the particle diameter at described micro-silver powder end is 10-20 μm, and the particle diameter of described Nano Silver powder is 60-90nm.
Wherein, the particle diameter of described powdered graphite is 20-50 μm.
Wherein, the particle diameter of described SiO 2 powder is for being 30-80 μm.
The preparation method of above-mentioned conductive silver paste for touch screens, it comprises following preparation process:
Steps A: the epoxy resin of formula ratio, mylar, diethylene glycol ether acetate, butyl acetate are uniformly dispersed, obtain organic carrier;
Step B: the silver powder of formula ratio, powdered graphite, SiO 2 powder are joined organic carrier and be uniformly dispersed, the concrete mode first stirring rear ultrasonic vibration that adopts is disperseed, and obtains a kind of conductive silver paste for touch screens.
embodiment 2.
A kind of conductive silver paste for touch screens, it is made up of the raw material of following percentage by weight: silver powder 60%, epoxy resin 5%, mylar 10%, powdered graphite 1%, SiO 2 powder 2%, diethylene glycol ether acetate 15%, butyl acetate 7%,
Wherein, described epoxy resin is PU modified epoxy vinyl ester resin,
Wherein, described mylar is acrylic type mylar.
Wherein, silver powder is micro-silver powder end and the Nano Silver powder constituent of 1:30 by mass ratio, and the particle diameter at described micro-silver powder end is 10-20 μm, and the particle diameter of described Nano Silver powder is 60-90nm.
Wherein, the particle diameter of described powdered graphite is 20-50 μm.
Wherein, the particle diameter of described SiO 2 powder is for being 30-80 μm.
The preparation method of above-mentioned conductive silver paste for touch screens, it comprises following preparation process:
Steps A: the epoxy resin of formula ratio, mylar, diethylene glycol ether acetate, butyl acetate are uniformly dispersed, obtain organic carrier;
Step B: the silver powder of formula ratio, powdered graphite, SiO 2 powder are joined organic carrier and be uniformly dispersed, the concrete mode first stirring rear ultrasonic vibration that adopts is disperseed, and obtains a kind of conductive silver paste for touch screens.
embodiment 3.
A kind of conductive silver paste for touch screens, it is made up of the raw material of following percentage by weight: silver powder 65%, epoxy resin 15%, mylar 5%, powdered graphite 0.1%, SiO 2 powder 1.9%, diethylene glycol ether acetate 5%, butyl acetate 8%
Wherein, described epoxy resin is PU modified epoxy vinyl ester resin,
Wherein, described mylar is acrylic type mylar.
Wherein, silver powder is micro-silver powder end and the Nano Silver powder constituent of 1:25 by mass ratio, and the particle diameter at described micro-silver powder end is 10-20 μm, and the particle diameter of described Nano Silver powder is 60-90nm.
Wherein, the particle diameter of described powdered graphite is 20-50 μm.
Wherein, the particle diameter of described SiO 2 powder is for being 30-80 μm.
The preparation method of above-mentioned conductive silver paste for touch screens, it comprises following preparation process:
Steps A: the epoxy resin of formula ratio, mylar, diethylene glycol ether acetate, butyl acetate are uniformly dispersed, obtain organic carrier;
Step B: the silver powder of formula ratio, powdered graphite, SiO 2 powder are joined organic carrier and be uniformly dispersed, the concrete mode first stirring rear ultrasonic vibration that adopts is disperseed, and obtains a kind of conductive silver paste for touch screens.
embodiment 4.
A kind of conductive silver paste for touch screens, it is made up of the raw material of following percentage by weight: silver powder 70%, epoxy resin 5%, mylar 13%, powdered graphite 0.5%, SiO 2 powder 1.5%, diethylene glycol ether acetate 5%, butyl acetate 5%
Wherein, described epoxy resin is PU modified epoxy vinyl ester resin,
Wherein, described mylar is acrylic type mylar.
Wherein, silver powder is micro-silver powder end and the Nano Silver powder constituent of 1:30 by mass ratio, and the particle diameter at described micro-silver powder end is 10-20 μm, and the particle diameter of described Nano Silver powder is 60-90nm.
Wherein, the particle diameter of described powdered graphite is 20-50 μm.
Wherein, the particle diameter of described SiO 2 powder is for being 30-80 μm.
The preparation method of above-mentioned conductive silver paste for touch screens, it comprises following preparation process:
Steps A: the epoxy resin of formula ratio, mylar, diethylene glycol ether acetate, butyl acetate are uniformly dispersed, obtain organic carrier;
Step B: the silver powder of formula ratio, powdered graphite, SiO 2 powder are joined organic carrier and be uniformly dispersed, the concrete mode first stirring rear ultrasonic vibration that adopts is disperseed, and obtains a kind of conductive silver paste for touch screens.
embodiment 5.
A kind of conductive silver paste for touch screens, it is made up of the raw material of following percentage by weight: silver powder 65%, epoxy resin 10%, mylar 8%, powdered graphite 1%, SiO 2 powder 2%, diethylene glycol ether acetate 7%, butyl acetate 7%,
Wherein, described epoxy resin is PU modified epoxy vinyl ester resin,
Wherein, described mylar is acrylic type mylar.
Wherein, silver powder is micro-silver powder end and the Nano Silver powder constituent of 1:20-1:30 by mass ratio, and the particle diameter at described micro-silver powder end is 10-20 μm, and the particle diameter of described Nano Silver powder is 60-90nm.
Wherein, the particle diameter of described powdered graphite is 20-50 μm.
Wherein, the particle diameter of described SiO 2 powder is for being 30-80 μm.
The preparation method of above-mentioned conductive silver paste for touch screens, it comprises following preparation process:
Steps A: the epoxy resin of formula ratio, mylar, diethylene glycol ether acetate, butyl acetate are uniformly dispersed, obtain organic carrier;
Step B: the silver powder of formula ratio, powdered graphite, SiO 2 powder are joined organic carrier and be uniformly dispersed, the concrete mode first stirring rear ultrasonic vibration that adopts is disperseed, and obtains a kind of conductive silver paste for touch screens.
embodiment 6.
A kind of conductive silver paste for touch screens, it is made up of the raw material of following percentage by weight: silver powder 55%, epoxy resin 10%, mylar 10%, powdered graphite 1%, SiO 2 powder 1%, diethylene glycol ether acetate 13%, butyl acetate 10%
Wherein, described epoxy resin is PU modified epoxy vinyl ester resin,
Wherein, described mylar is acrylic type mylar.
Wherein, silver powder is micro-silver powder end and the Nano Silver powder constituent of 1:20-1:30 by mass ratio, and the particle diameter at described micro-silver powder end is 10-20 μm, and the particle diameter of described Nano Silver powder is 60-90nm.
Wherein, the particle diameter of described powdered graphite is 20-50 μm.
Wherein, the particle diameter of described SiO 2 powder is for being 30-80 μm.
The preparation method of above-mentioned conductive silver paste for touch screens, it comprises following preparation process:
Steps A: the epoxy resin of formula ratio, mylar, diethylene glycol ether acetate, butyl acetate are uniformly dispersed, obtain organic carrier;
Step B: the silver powder of formula ratio, powdered graphite, SiO 2 powder are joined organic carrier and be uniformly dispersed, the concrete mode first stirring rear ultrasonic vibration that adopts is disperseed, and obtains a kind of conductive silver paste for touch screens.
The above-mentioned properties of embodiment 1-6 is in table 1.
Table 1
Can be found out by table 1, the present invention conducts electricity very well, and adhesion is high.
Finally should be noted that; above embodiment is only in order to illustrate technical scheme of the present invention; but not limiting the scope of the invention; although done to explain to the present invention with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to technical scheme of the present invention or equivalent replacement, and not depart from essence and the scope of technical solution of the present invention.
Claims (5)
1. a conductive silver paste for touch screens, is characterized in that: it is made up of the raw material of following percentage by weight:
Silver powder 55-70%
Epoxy resin 5-15%
Mylar 5-15%
Powdered graphite 0.1-1%
SiO 2 powder 1-2%
Diethylene glycol ether acetate 5-15%
Butyl acetate 5-15%,
Wherein, described epoxy resin is PU modified epoxy vinyl ester resin,
Wherein, described mylar is acrylic type mylar,
Silver powder is micro-silver powder end and the Nano Silver powder constituent of 1:20-1:30 by mass ratio, and the particle diameter at described micro-silver powder end is 10-20 μm, and the particle diameter of described Nano Silver powder is 60-90nm,
The particle diameter of described powdered graphite is 20-50 μm,
The particle diameter of described SiO 2 powder is for being 30-80 μm.
2. a kind of conductive silver paste for touch screens according to claim 1, is characterized in that: it is made up of the raw material of following percentage by weight:
Silver powder 55-65%
Epoxy resin 5-15%
Mylar 5-15%
Powdered graphite 0.5-1%
SiO 2 powder 1-1.5%
Diethylene glycol ether acetate 5-8%
Butyl acetate 5-8%.
3. a kind of conductive silver paste for touch screens according to claim 1, is characterized in that: it is made up of the raw material of following percentage by weight:
Silver powder 65%
Epoxy resin 10%
Mylar 8%
Powdered graphite 1%
SiO 2 powder 2%
Diethylene glycol ether acetate 7%
Butyl acetate 7%.
4. the preparation method of a kind of conductive silver paste for touch screens described in any one of claim 1-3, is characterized in that: it comprises following preparation process:
Steps A: the epoxy resin of formula ratio, mylar, diethylene glycol ether acetate, butyl acetate are uniformly dispersed, obtain organic carrier;
Step B: the silver powder of formula ratio, powdered graphite, SiO 2 powder are joined organic carrier and be uniformly dispersed, obtains a kind of conductive silver paste for touch screens.
5. the preparation method of a kind of conductive silver paste for touch screens according to claim 4, is characterized in that: after described step B adopts and first stirs, the mode of ultrasonic vibration is disperseed.
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Families Citing this family (10)
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| CN103729089B (en) * | 2013-12-31 | 2016-08-24 | 东莞市平波电子有限公司 | A kind of manufacture method of the touch screen of GFF structure |
| CN104123976B (en) * | 2014-02-09 | 2016-07-06 | 深圳唯一科技股份有限公司 | A kind of handset touch panel electric slurry and preparation method thereof |
| CN104157323A (en) * | 2014-07-30 | 2014-11-19 | 安徽状元郎电子科技有限公司 | Silica powder corrosion-resistant conductive slurry and manufacturing method thereof |
| CN104464881B (en) * | 2014-11-17 | 2017-02-22 | 昆明贵金属研究所 | Dual-function electric conduction silver paste for touch screen and preparation method and application thereof |
| CN104575683B (en) * | 2015-01-08 | 2017-01-04 | 安徽凤阳德诚科技有限公司 | Conductive silver paste with long service life |
| CN104629512A (en) * | 2015-02-06 | 2015-05-20 | 海宁安剑贸易有限公司 | Touch screen fluid and preparation method thereof |
| CN106683747B (en) * | 2017-01-23 | 2017-12-22 | 湖南省国银新材料有限公司 | A kind of touch-screen silver paste and preparation method thereof |
| CN107818845A (en) * | 2017-09-19 | 2018-03-20 | 合肥惠科金扬科技有限公司 | A kind of preparation method of TFT LCD screens conductive silver paste |
| CN109754904A (en) * | 2019-02-21 | 2019-05-14 | 珠海纳金科技有限公司 | A kind of laser ablation electrocondution slurry and preparation method thereof |
| CN111253883B (en) * | 2019-10-30 | 2021-08-03 | 安第斯新材料科技(浙江)有限公司 | Ultrafast photon curing conductive adhesive and preparation method thereof |
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