CN103165215B - A kind of mobile phone shielding silver paste and preparation method thereof - Google Patents
A kind of mobile phone shielding silver paste and preparation method thereof Download PDFInfo
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- CN103165215B CN103165215B CN201110418652.3A CN201110418652A CN103165215B CN 103165215 B CN103165215 B CN 103165215B CN 201110418652 A CN201110418652 A CN 201110418652A CN 103165215 B CN103165215 B CN 103165215B
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Abstract
The present invention relates to a kind of mobile phone shielding silver paste and preparation method thereof, conductive silver paste comprises following component and weight percent content: silver powder 45-54, macromolecule resin 7-9, adhesion promoter 0.2-0.4, thickener 0.5-2.0, solvent 37-45, is starched by formulation vehicle, preparation silver and is carried out having produced the manufacture of silver paste.Compared with prior art, the present invention can starch products at 80 degree of 30 minutes completely crued silver, and the resistance value after solidification is less than 1 ohm, the heatproof requirement of the shielding material not only met, and also meets the resistance requirement needed for shielding simultaneously.
Description
Technical field
The present invention relates to a kind of silver paste and preparation method thereof, especially relate to a kind of mobile phone shielding silver paste and preparation method thereof.
Background technology
According to the display of Strategy Analytics current research, the second quarter in 2011, global mobile phone shipment amount increased by 13% compared with the same period of last year, reached 3.611 hundred million.There is since nineteen ninety-nine maximum downslide in Nokia, and apple is close to the LG be number three.
StrategyAnalytics senior analyst AlexSpektor makes a comment: " although multiple debt crisis and economic turmoil occur global range, mobile phone market still development circumstances is good.The second quarter in 2011, global mobile phone shipment amount increased by 13% compared with the same period of last year, reached 300,000,000 6,110 ten thousand.Apple performance is outstanding, and its shipment amount reaches record-breaking 2,030 ten thousand.
Along with continuing to increase of handset demand, everyone may can't do without taking on the telephone every day, but mobile phone belongs to radiotechnics, relate to the radiation problem of electromagnetic pulse to human body, just carried out spraying conductive shielding layer in the inner side of mobile phone shell in the past, but mobile phone key cannot be shielded to here, in order to better meet this contradiction, below mobile phone key, increasing the netted signal shielding layer of one deck is the ways of addressing this issue expected at present.
The silver slurry product of current use is all use with original circuit silver slurry.The current Problems existing of these silver slurries is:
Curing temperature is high, reach about 150 degree, and rational and suitable temperature is good at about 80 degree.
Resistance is large, and reach the requirement of European Union to amount of radiation-60DB, resistance requirement is less than less than 1 ohm, and existing silver slurry also cannot meet these requirements.
Summary of the invention
Object of the present invention is exactly provide one can at 80 degree of 30 minutes completely crued mobile phone shielding silver pastes and preparation method thereof to overcome defect that above-mentioned prior art exists.
Object of the present invention can be achieved through the following technical solutions:
A kind of mobile phone shielding silver paste, comprises following component and weight percent content:
Silver powder 45-54;
Macromolecule resin 7-9;
Adhesion promoter 0.2-0.4;
Thickener 0.5-2.0;
Solvent 37-45.
Described silver powder is flake silver powder, and the grain diameter of this silver powder is 3-7 μm, and tap density is 2.6-3.5g/ml.
Described macromolecule resin is chlorine vinegar copolymer.
Described adhesion promoter is silane coupler.
Described thickener is aerosil.
Described solvent is commercially available DBE (divalent acid fat).
A preparation method for mobile phone shielding silver paste, comprises the following steps:
(1) get the raw materials ready according to following component and weight percent content:
Silver powder 45-54,
Macromolecule resin 7-9,
Adhesion promoter 0.2-0.4,
Thickener 0.5-2.0,
Solvent 37-45;
(2) preparation of carrier: take macromolecule resin and solvent, be then poured in dissolution kettle, power-on is stirred, and after the transparent shape of carrier, is used 300-400 order screen cloth to carry out filtering and impurity removing, obtains carrier.
(3) preparation of silver slurry: take silver powder, carrier, adhesion promoter, thickener, be placed in high speed dispersor and carry out high speed dispersion, obtain uniform slurry.
(4) production of silver paste: above-mentioned slurry is ground in three-high mill, silver slurry fineness is made to reach less than 15 μm by the adjustment of roll seam, make the viscosity of silver slurry within the scope of 10-30PaS by the fine setting of solvent, obtained halogen-free silver paste for laptop.
Compared with prior art, the present invention is directed to mobile phone shielding base material and requirement on electric performance, developing curing temperature can at 80 degree of 30 minutes completely crued silver slurry product, and the resistance value after solidification is less than 1 ohm, the heatproof requirement of the shielding material not only met, also meets the resistance requirement needed for shielding simultaneously.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.
Embodiment 1
A preparation method for mobile phone silver paste, the method comprises the following steps:
(1) get the raw materials ready, get the raw materials ready according to following component: silver powder 45kg, macromolecule resin 9kg, adhesion promoter 0.2kg, thickener 2.0kg, solvent 43.8kg.Silver powder used is flake silver powder, and grain diameter is 7 μm, tap density 3.5g/ml; Macromolecule resin used is chlorine vinegar copolymer, and adhesion promoter used is silane coupler, and thickener used is aerosil, and solvent used is DBE.
(2) preparation of carrier: take chlorine vinegar copolymer and DBE, be then poured in dissolution kettle, power-on is stirred, and after the transparent shape of carrier, is used 300-400 order screen cloth to carry out filtering and impurity removing, obtains carrier.
(3) preparation of silver slurry: take silver powder, carrier, adhesion promoter, thickener and solvent, be placed in high degree of dispersion machine and carry out high speed dispersion, obtain uniform slurry.
(4) production of silver paste: ground in three-high mill by above-mentioned slurry, makes the fineness of silver slurry reach 9 μm by the adjustment of roll seam, makes viscosity be 10PaS, obtained mobile phone shielding silver paste by the fine setting of solvent.
Embodiment 2
(1) get the raw materials ready, get the raw materials ready according to following component: silver powder 50kg, macromolecule resin 8kg, adhesion promoter 0.3kg, thickener 1.6kg, solvent 40.1kg.Silver powder used is flake silver powder, and grain diameter is 5 μm, tap density 2.85g/ml; Macromolecule resin used is chlorine vinegar copolymer, and adhesion promoter used is silane coupler, and thickener used is aerosil, and solvent used is DBE.
(2) preparation of carrier: take chlorine vinegar copolymer and DBE, be then poured in dissolution kettle, power-on is stirred, and after the transparent shape of carrier, is used 300-400 order screen cloth to carry out filtering and impurity removing, obtains carrier.
(3) preparation of silver slurry: take silver powder, carrier, adhesion promoter, thickener and solvent, be placed in high degree of dispersion machine and carry out high speed dispersion, obtain uniform slurry.
(4) production of silver paste: ground in three-high mill by above-mentioned slurry, makes the fineness of silver slurry reach 10 μm by the adjustment of roll seam, makes viscosity be 13PaS, obtained mobile phone shielding silver paste by the fine setting of solvent.
Embodiment 3
(1) get the raw materials ready, get the raw materials ready according to following component: silver powder 54kg, macromolecule resin 7kg, adhesion promoter 0.3kg, thickener 1.5kg, solvent 37.2kg.Silver powder used is flake silver powder, and grain diameter is 3 μm, tap density 2.6g/ml; Macromolecule resin used is chlorine vinegar copolymer, and adhesion promoter used is silane coupler, and thickener used is aerosil, and solvent used is DBE.
(2) preparation of carrier: take chlorine vinegar copolymer and DBE, be then poured in dissolution kettle, power-on is stirred, and after the transparent shape of carrier, is used 300-400 order cloth to carry out filtration impurity removal, obtains carrier.
(3) preparation of silver slurry: take silver powder, carrier, adhesion promoter, thickener and solvent, be placed in high degree of dispersion machine and carry out high speed dispersion, obtain uniform slurry.
(4) production of silver paste: ground in three-high mill by above-mentioned slurry, makes the fineness of silver slurry reach 11 μm by the adjustment of roll seam, makes viscosity be 14PaS, obtained mobile phone shielding silver paste by the fine setting of solvent.
Embodiment 4
A preparation method for mobile phone shielding silver paste, comprises the following steps:
(1) get the raw materials ready according to following component and content: silver powder 46kg, macromolecule resin chlorine vinegar copolymer 8.1kg, adhesion promoter are silane coupler 0.4kg, thickener aerosil 0.5kg, solvent are commercially available DBE (divalent acid fat) 45kg;
(2) preparation of carrier: take macromolecule resin and solvent, be then poured in dissolution kettle, power-on is stirred, and after the transparent shape of carrier, is used 300-400 order screen cloth to carry out filtering and impurity removing, obtains carrier.
(3) preparation of silver slurry: take silver powder, carrier, adhesion promoter, thickener, be placed in high speed dispersor and carry out high speed dispersion, obtain uniform slurry.
(4) production of silver paste: above-mentioned slurry is ground in three-high mill, silver slurry fineness is made to reach less than 15 μm by the adjustment of roll seam, make the viscosity of silver slurry within the scope of 10-30PaS by the fine setting of solvent, obtained halogen-free silver paste for laptop.
Claims (6)
1. a mobile phone shielding silver paste, is characterized in that, this mobile phone shielding silver paste comprises following component and weight percent content:
Described macromolecule resin is chlorine vinegar copolymer.
2. a kind of mobile phone shielding silver paste according to claim 1, is characterized in that, described silver powder is flake silver powder, and the grain diameter of this silver powder is 3-7 μm, and tap density is 2.6-3.5g/ml.
3. a kind of mobile phone shielding silver paste according to claim 1, is characterized in that, described adhesion promoter is silane coupler.
4. a kind of mobile phone shielding silver paste according to claim 1, is characterized in that, described thickener is aerosil.
5. a kind of mobile phone shielding silver paste according to claim 1, is characterized in that, described solvent is commercially available DBE (divalent acid fat).
6. a preparation method for mobile phone shielding silver paste as claimed in claim 1, it is characterized in that, the method comprises the following steps:
(1) get the raw materials ready according to following component and weight percent content:
(2) preparation of carrier: take macromolecule resin and solvent, be then poured in dissolution kettle, power-on is stirred, and after the transparent shape of carrier, is used 300-400 order screen cloth to carry out filtering and impurity removing, obtains carrier;
(3) preparation of silver slurry: take silver powder, carrier, adhesion promoter, thickener, be placed in high speed dispersor and carry out high speed dispersion, obtain uniform slurry;
(4) production of silver paste: ground in three-high mill by above-mentioned slurry, makes silver slurry fineness reach less than 15 μm by the adjustment of roll seam, makes the viscosity of silver slurry within the scope of 10-30PaS by the fine setting of solvent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110418652.3A CN103165215B (en) | 2011-12-14 | 2011-12-14 | A kind of mobile phone shielding silver paste and preparation method thereof |
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| CN201110418652.3A CN103165215B (en) | 2011-12-14 | 2011-12-14 | A kind of mobile phone shielding silver paste and preparation method thereof |
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| CN103165215A CN103165215A (en) | 2013-06-19 |
| CN103165215B true CN103165215B (en) | 2015-09-09 |
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| JP4447273B2 (en) * | 2003-09-19 | 2010-04-07 | 三井金属鉱業株式会社 | Silver ink and method for producing the same |
| CN102054881B (en) * | 2009-10-29 | 2012-07-18 | 上海宝银电子材料有限公司 | Solderable conductive silver paste with low-temperature back of crystalline silicon solar cell and preparation method |
| CN102079847A (en) * | 2009-11-27 | 2011-06-01 | 东莞市立高电子制品有限公司 | Photosensitive silver slurry conductive adhesive and preparation method thereof |
| CN101882481A (en) * | 2010-06-28 | 2010-11-10 | 彩虹集团公司 | Halogen-free type low-temperature solidified silver paste and method for preparing same |
| CN102157222B (en) * | 2011-04-13 | 2012-05-23 | 成都印钞有限公司 | Low-temperature conductive silver paste and preparation method thereof |
| CN102254586B (en) * | 2011-05-05 | 2012-06-06 | 苏州喜仁新材料科技有限公司 | Low-temperature cured conductive silver paste and preparation method and use thereof |
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Inventor after: Jiang Haihan Inventor after: Zhu Qingming Inventor after: He Lina Inventor before: Zhu Yuming |
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