CN101645318A - Conductive silver paste special for circuit of laptop keyboard and preparation method thereof - Google Patents
Conductive silver paste special for circuit of laptop keyboard and preparation method thereof Download PDFInfo
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- CN101645318A CN101645318A CN200810041500A CN200810041500A CN101645318A CN 101645318 A CN101645318 A CN 101645318A CN 200810041500 A CN200810041500 A CN 200810041500A CN 200810041500 A CN200810041500 A CN 200810041500A CN 101645318 A CN101645318 A CN 101645318A
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Abstract
The invention relates to a conductive silver paste special for a circuit of a laptop keyboard and a preparation method thereof. The silver paste is prepared from the raw materials of the following components in percentage by weight: 55 to 65 percent of metal silver powder, 10 to 20 percent of macromolecule resin, 1.5 to 5 percent of additive and 10 to 25 percent of solvent. Compared with the priorart, a conductive silver circuit obtained by drying the silver paste has excellent anti-bending performance, the coverage property or associative property of insulation oil or carbon paste on a silver layer is greatly improved, and the performances such as screen printing property, surface rigidity, corrodibility resistance, environmental service life and the like are also improved; and the conductive silver paste enables the silver circuit obtained by screen printing, drying and solidify to be fully suitable for the process requirement of the production of the laptop keyboards.
Description
Technical field
The present invention relates to conductive silver paste, relate in particular to a kind of conductive silver paste special for circuit of laptop keyboard and preparation method thereof.
Background technology
With respect to desktop computer keyboard circuit, the keyboard setting of notebook computer is determined by complicated more production technology, therefore with regard to the performance of silver slurry product, requires the circuit of laptop keyboard dedicated silver paste to meet higher use standard, specifically comprises:
1. the bending resistance folding endurance of silver-colored circuit: because the design of each parts of notebook computer has very big restriction on taking up room, and as the PET film of keyboard circuit and cover silver-colored circuit on it by silk screen printing and when computer is assembled, must therefore require silver-colored circuit to have stronger bend resistance performance by crooked or fold and save the space.
2. after dielectric ink and carbon slurry is printed on the silver-colored circuit, and the good binding performance is arranged between the silver layer, the phenomenon that can't cover or come off can not take place.
3. the silver layer on the circuit has better hardness, is difficult for being worn.
4. silver-colored circuit has very strong antioxygenic property, plays a part certain at this respect in useful life that improves notebook computer.
Shortcomings such as at present, circuit of laptop keyboard is starched with silver and existed the bend resistance poor performance, is worn easily, useful life is short.
Summary of the invention
Purpose of the present invention is exactly to provide conductive silver paste special for circuit of laptop keyboard that a kind of bend resistance performance is strong, associativity good, oxidation resistance is strong and preparation method thereof for the defective that overcomes above-mentioned prior art existence.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of conductive silver paste special for circuit of laptop keyboard is characterized in that, this silver paste is made by the raw material that comprises following component and content (weight):
Silver powder 55%～65%;
Macromolecule resin 10%～20%;
Additive 1.5%～5%;
Solvent 10%～25%.
Described silver powder is the mixing silver powder that flake silver powder and spherical silver powder are formed, and the grain diameter of described flake silver powder is 5～10 μ m, apparent density 0.8～1.2g/ml.
Described macromolecule resin is selected from polyurethane resin or mylar; Described solvent is selected from esters solvent or ketones solvent.
Described additive comprises levelling agent, thickener, defoamer, and three's weight ratio is 1～4: 0.4～2: 1～4.
Described levelling agent is selected from one or more in castor oil, olein, the butyl acetate; Described thickener is selected from one or more in aerosil, polyvinyl alcohol, the rilanit special; Described defoamer is selected from ethylene glycol, n-butanol, the ethyl silicon oil one or more.
A kind of preparation method of conductive silver paste special for circuit of laptop keyboard is characterized in that, this method comprises following processing step:
(1) get the raw materials ready according to following component and content (weight):
Silver powder 55%～65%,
Macromolecule resin 10%～20%,
Additive 1.5%～5%,
Solvent 10%～25%;
(2) preparation of carrier:
With macromolecule resin, solvent, be heated to 70～90 ℃ and constant temperature, be dissolved to viscosity at 3000～6000 centipoises until resin constant temperature, filtering and impurity removing on 500～800 purpose screen cloths obtains carrier;
(3) preparation of silver slurry:
The carrier for preparing in silver powder, additive and the step (2) is fully mixed in batch mixer, re-use the high speed dispersor high speed dispersion, obtain silver slurry uniformly;
(4) preparation of silver paste:
The silver slurry that obtains in the step (3) is ground in three-high mill, and the grain diameter of silver slurry reaches 5～10 μ m, viscosity reaches 20000～30000 centipoises, obtains conductive silver paste special for circuit of laptop keyboard.
Described silver powder is the mixing silver powder that flake silver powder and spherical silver powder are formed, and the grain diameter of described flake silver powder is 5～10 μ m, apparent density 0.8～1.2g/ml.
Described macromolecule resin is selected from polyurethane resin or mylar; Described solvent is selected from esters solvent or ketones solvent.
Described additive comprises levelling agent, thickener, defoamer, and three's weight ratio is 1～4: 0.4～2: 1～4.
Described levelling agent is selected from one or more in castor oil, olein, the butyl acetate; Described thickener is selected from one or more in aerosil, polyvinyl alcohol, the rilanit special; Described defoamer is selected from ethylene glycol, n-butanol, the ethyl silicon oil one or more.
The present invention makes the resulting silver layer in silver slurry oven dry back have minimum volume resistance by selecting high molecular material resin for use; Promote resin to improve the adhesion between silver layer and PET and the hardness of silver layer itself by adding 1.5%～5% adhesive force; Improve the performance of its bend resistance by interpolation low bulk sheet powder and ultra-fine ball powder; By selection to additive, after raising dielectric ink and carbon slurry are printed on the silver-colored circuit, and the good binding performance is arranged between the silver layer, the phenomenon that can't cover or come off can not take place.Select the particle of flake silver powder directly to be controlled at 5～10 μ m, apparent density 0.8～1.2g/ml, such silver powder has good dispersiveness and can reduce silver layer because the probability of fracture takes place in the external force effect, thereby improves the hardness of electric conductivity, bending resistance folding endurance, silver layer.
Compared with prior art, the resulting conductive silver circuit in silver slurry of the present invention oven dry back has preferable bend resistance performance, but insulating oil or spreadability or the binding ability of carbon slurry on silver layer are well improved, and improved the performance such as silk screen printing, case hardness, corrosion resistance, environment useful life of silver paste, can make conductive silver paste resulting silver-colored circuit after process silk screen printing, baking and curing, be suitable for the technological requirement that keyboard of notebook computer is produced fully.
Embodiment
The invention will be further described in conjunction with specific embodiments in contrast below.
Embodiment 1
A kind of preparation method of conductive silver paste special for circuit of laptop keyboard, this method comprises following processing step:
(1) get the raw materials ready according to following component and content (weight):
Silver powder 55%
Macromolecule resin 20%
Additive 2.5%
Solvent 22.5%
Described silver powder is the mixing silver powder (weight ratio is 8: 1) that flake silver powder and spherical silver powder are formed, the grain diameter of described flake silver powder is 5 μ m, apparent density 0.8g/ml, the particle diameter of described spherical silver powder is less than 1 μ m, described macromolecule resin is a polyurethane resin, described additive comprises levelling agent olein, thickener polyvinyl alcohol, defoamer n-butanol, and three's weight ratio is 1: 0.4: 1, and described solvent is a cyclohexanone;
(2) preparation of carrier:
With macromolecule resin, solvent, be heated to 85 ℃ and constant temperature, be dissolved to viscosity at 3000 centipoises until resin constant temperature, filtering and impurity removing on 500 purpose screen cloths obtains carrier;
(3) preparation of silver slurry:
The carrier for preparing in silver powder, additive and the step (2) is fully mixed in batch mixer, re-use the high speed dispersor high speed dispersion, obtain silver slurry uniformly;
(4) preparation of silver paste:
The silver slurry that obtains in the step (3) is ground in three-high mill, and the grain diameter of silver slurry reaches 5 μ m, viscosity reaches 20000 centipoises, obtains conductive silver paste special for circuit of laptop keyboard.
Embodiment 2
A kind of preparation method of conductive silver paste special for circuit of laptop keyboard, this method comprises following processing step:
(1) get the raw materials ready according to following component and content (weight):
Silver powder 60%
Macromolecule resin 16%
Additive 1.5%
Solvent 22.5%
Described silver powder is the mixing silver powder (weight ratio is 4: 1) that flake silver powder and spherical silver powder are formed, the grain diameter of described flake silver powder is 7 μ m, apparent density 1.0g/ml, the particle diameter of described spherical silver powder is less than 1 μ m, described macromolecule resin is toluene di-isocyanate(TDI)-ethylene glycol polymer or vulcabond diphenyl-methane-glycerol polymer, described additive comprises levelling agent castor oil, thickener aerosil, defoamer ethylene glycol, three's weight ratio is 2: 1.5: 2, and described solvent is a methyl benzoate;
(2) preparation of carrier:
With macromolecule resin, solvent, be heated to 70 ℃ and constant temperature, be dissolved to viscosity at 4500 centipoises until resin constant temperature, filtering and impurity removing on 600 purpose screen cloths obtains carrier;
(3) preparation of silver slurry:
The carrier for preparing in silver powder, additive and the step (2) is fully mixed in batch mixer, re-use the high speed dispersor high speed dispersion, obtain silver slurry uniformly;
(4) preparation of silver paste:
The silver slurry that obtains in the step (3) is ground in three-high mill, and the grain diameter of silver slurry reaches 7 μ m, viscosity reaches 25000 centipoises, obtains conductive silver paste special for circuit of laptop keyboard.
Embodiment 3
A kind of preparation method of conductive silver paste special for circuit of laptop keyboard, this method comprises following processing step:
(1) get the raw materials ready according to following component and content (weight):
Silver powder 65%
Macromolecule resin 10%
Additive 5%
Solvent 20%
Described silver powder is the mixing silver powder (weight ratio is 5: 1) that flake silver powder and spherical silver powder are formed, the grain diameter of described flake silver powder is 9 μ m, apparent density 1.2g/ml, the particle diameter of described spherical silver powder is less than 1 μ m, described macromolecule resin is a mylar, described additive comprises levelling agent butyl acetate, thickener rilanit special, defoamer ethyl silicon oil, and three's weight ratio is 4: 1: 3, and described solvent is an ethyl benzoate;
(2) preparation of carrier:
With macromolecule resin, solvent, be heated to 90 ℃ and constant temperature, be dissolved to viscosity at 5000 centipoises until resin constant temperature, filtering and impurity removing on 700 purpose screen cloths obtains carrier;
(3) preparation of silver slurry:
The carrier for preparing in silver powder, additive and the step (2) is fully mixed in batch mixer, re-use the high speed dispersor high speed dispersion, obtain silver slurry uniformly;
(4) preparation of silver paste:
The silver slurry that obtains in the step (3) is ground in three-high mill, and the grain diameter of silver slurry reaches 9 μ m, viscosity reaches 28000 centipoises, obtains conductive silver paste special for circuit of laptop keyboard.
Embodiment 4
A kind of preparation method of conductive silver paste special for circuit of laptop keyboard, this method comprises following processing step:
(1) get the raw materials ready according to following component and content (weight):
Silver powder 58%
Macromolecule resin 13%
Additive 4%
Solvent 25%
Described silver powder is the mixing silver powder (weight ratio is 6: 1) that flake silver powder and spherical silver powder are formed, the grain diameter of described flake silver powder is 10 μ m, apparent density 1.1g/ml, the particle diameter of described spherical silver powder is less than 1 μ m, described macromolecule resin is polyethylene terephthalate or poly-2,6-naphthalenedicarboxylic acid second diester, described additive comprises the levelling agent butyl acetate, castor oil (the two weight ratio 2: 1), the thickener rilanit special, polyvinyl alcohol (the two weight ratio 1: 2), the defoamer ethyl silicon oil, ethylene glycol (the two weight ratio 4: 1), levelling agent, thickener and defoamer three's weight ratio is 3: 2: 4, and described solvent is a benzophenone;
(2) preparation of carrier:
With macromolecule resin, solvent, be heated to 85 ℃ and constant temperature, be dissolved to viscosity at 6000 centipoises until resin constant temperature, filtering and impurity removing on 800 purpose screen cloths obtains carrier;
(3) preparation of silver slurry:
The carrier for preparing in silver powder, additive and the step (2) is fully mixed in batch mixer, re-use the high speed dispersor high speed dispersion, obtain silver slurry uniformly;
(4) preparation of silver paste:
The silver slurry that obtains in the step (3) is ground in three-high mill, and the grain diameter of silver slurry reaches 10 μ m, viscosity reaches 30000 centipoises, obtains conductive silver paste special for circuit of laptop keyboard.
Claims (10)
1. a conductive silver paste special for circuit of laptop keyboard is characterized in that, this silver paste is made by the raw material that comprises following component and content (weight):
Silver powder 55%～65%;
Macromolecule resin 10%～20%;
Additive 1.5%～5%;
Solvent 10%～25%.
2. conductive silver paste special for circuit of laptop keyboard according to claim 1, it is characterized in that, described silver powder is the mixing silver powder that flake silver powder and spherical silver powder are formed, and the grain diameter of described flake silver powder is 5～10 μ m, apparent density 0.8～1.2g/ml.
3. conductive silver paste special for circuit of laptop keyboard according to claim 1 is characterized in that described macromolecule resin is selected from polyurethane resin or mylar; Described solvent is selected from esters solvent or ketones solvent.
4. conductive silver paste special for circuit of laptop keyboard according to claim 1 is characterized in that described additive comprises levelling agent, thickener, defoamer, and three's weight ratio is 1～4: 0.4～2: 1～4.
5. conductive silver paste special for circuit of laptop keyboard according to claim 4 is characterized in that described levelling agent is selected from one or more in castor oil, olein, the butyl acetate; Described thickener is selected from one or more in aerosil, polyvinyl alcohol, the rilanit special; Described defoamer is selected from ethylene glycol, n-butanol, the ethyl silicon oil one or more.
6. the preparation method of a conductive silver paste special for circuit of laptop keyboard is characterized in that, this method comprises following processing step:
(1) get the raw materials ready according to following component and content (weight):
Silver powder 55%～65%,
Macromolecule resin 10%～20%,
Additive 1.5%～5%,
Solvent 10%～25%;
(2) preparation of carrier:
With macromolecule resin, solvent, be heated to 70～90 ℃ and constant temperature, be dissolved to viscosity at 3000～6000 centipoises until resin constant temperature, filtering and impurity removing on 500～800 purpose screen cloths obtains carrier;
(3) preparation of silver slurry:
The carrier for preparing in silver powder, additive and the step (2) is fully mixed in batch mixer, re-use the high speed dispersor high speed dispersion, obtain silver slurry uniformly;
(4) preparation of silver paste:
The silver slurry that obtains in the step (3) is ground in three-high mill, and the grain diameter of silver slurry reaches 5～10 μ m, viscosity reaches 20000～30000 centipoises, obtains conductive silver paste special for circuit of laptop keyboard.
7. the preparation method of conductive silver paste special for circuit of laptop keyboard according to claim 6, it is characterized in that, described silver powder is the mixing silver powder that flake silver powder and spherical silver powder are formed, the grain diameter of described flake silver powder is 5～10 μ m, apparent density 0.8～1.2g/ml.
8. the preparation method of conductive silver paste special for circuit of laptop keyboard according to claim 6 is characterized in that, described macromolecule resin is selected from polyurethane resin or mylar; Described solvent is selected from esters solvent or ketones solvent.
9. the preparation method of conductive silver paste special for circuit of laptop keyboard according to claim 6 is characterized in that, described additive comprises levelling agent, thickener, defoamer, and three's weight ratio is 1～4: 0.4～2: 1～4.
10. the preparation method of conductive silver paste special for circuit of laptop keyboard according to claim 9 is characterized in that, described levelling agent is selected from one or more in castor oil, olein, the butyl acetate; Described thickener is selected from one or more in aerosil, polyvinyl alcohol, the rilanit special; Described defoamer is selected from ethylene glycol, n-butanol, the ethyl silicon oil one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810041500A CN101645318A (en) | 2008-08-07 | 2008-08-07 | Conductive silver paste special for circuit of laptop keyboard and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810041500A CN101645318A (en) | 2008-08-07 | 2008-08-07 | Conductive silver paste special for circuit of laptop keyboard and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101645318A true CN101645318A (en) | 2010-02-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810041500A Pending CN101645318A (en) | 2008-08-07 | 2008-08-07 | Conductive silver paste special for circuit of laptop keyboard and preparation method thereof |
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| CN102426872A (en) * | 2011-12-28 | 2012-04-25 | 彩虹集团公司 | Low temperature solidified silver paste for keyboard lines and preparation method thereof |
| CN102610296A (en) * | 2012-03-13 | 2012-07-25 | 江苏金陵特种涂料有限公司 | Thermosetting carbon/silver composite nano conductive silver paste and preparation method thereof |
| CN103165219A (en) * | 2011-12-15 | 2013-06-19 | 上海宝银电子材料有限公司 | Iodobromite-free slurry used for large keyboard and preparation method of iodobromite-free slurry |
| CN103165218A (en) * | 2011-12-15 | 2013-06-19 | 上海宝银电子材料有限公司 | Iodobromite-contained slurry used for large keyboard and preparation method of iodobromite-contained slurry |
| CN103165221A (en) * | 2011-12-15 | 2013-06-19 | 上海宝银电子材料有限公司 | Halogen-free silver paste for laptop and preparation method thereof |
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| US10741300B2 (en) | 2016-10-07 | 2020-08-11 | E I Du Pont De Nemours And Company | Conductive paste composition and semiconductor devices made therewith |
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| CN103165219A (en) * | 2011-12-15 | 2013-06-19 | 上海宝银电子材料有限公司 | Iodobromite-free slurry used for large keyboard and preparation method of iodobromite-free slurry |
| CN103165218A (en) * | 2011-12-15 | 2013-06-19 | 上海宝银电子材料有限公司 | Iodobromite-contained slurry used for large keyboard and preparation method of iodobromite-contained slurry |
| CN103165221A (en) * | 2011-12-15 | 2013-06-19 | 上海宝银电子材料有限公司 | Halogen-free silver paste for laptop and preparation method thereof |
| CN102426872A (en) * | 2011-12-28 | 2012-04-25 | 彩虹集团公司 | Low temperature solidified silver paste for keyboard lines and preparation method thereof |
| CN102610296A (en) * | 2012-03-13 | 2012-07-25 | 江苏金陵特种涂料有限公司 | Thermosetting carbon/silver composite nano conductive silver paste and preparation method thereof |
| CN102610296B (en) * | 2012-03-13 | 2014-04-09 | 江苏金陵特种涂料有限公司 | Preparation method of thermosetting carbon/silver composite nano conductive silver paste |
| CN103531267A (en) * | 2012-07-05 | 2014-01-22 | 横滨橡胶株式会社 | Conductive composition used for forming collecting electrode of solar cell and solar cell unit |
| CN104392766A (en) * | 2014-10-17 | 2015-03-04 | 阜阳市节源照明电器有限责任公司 | High-hardness conductive silver paste containing chromium powders and manufacturing method thereof |
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| US10741300B2 (en) | 2016-10-07 | 2020-08-11 | E I Du Pont De Nemours And Company | Conductive paste composition and semiconductor devices made therewith |
| US10593439B2 (en) | 2016-10-21 | 2020-03-17 | Dupont Electronics, Inc. | Conductive paste composition and semiconductor devices made therewith |
| US10825575B2 (en) | 2016-10-21 | 2020-11-03 | Dupont Electronics, Inc. | Conductive paste composition and semiconductor devices made therewith |
| CN107068293A (en) * | 2017-04-21 | 2017-08-18 | 绵阳市奇帆科技有限公司 | A kind of hetero-junctions crystal silicon solar back silver paste preparation method |
| CN106876006A (en) * | 2017-04-21 | 2017-06-20 | 绵阳市奇帆科技有限公司 | A kind of preparation method of touch-screen laser engraving silver paste |
| WO2019150162A1 (en) * | 2018-01-31 | 2019-08-08 | Eoplex Limited | Silver paste composition for configurable sintered interconnect and associated method of preparation |
| WO2022021228A1 (en) * | 2020-07-30 | 2022-02-03 | 欧菲光集团股份有限公司 | Conductive material, ultrasonic fingerprint module, and electronic device |
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