CN105788701B - A kind of capacitive touch screen fine-line laser-induced thermal etching conductive silver paste - Google Patents
A kind of capacitive touch screen fine-line laser-induced thermal etching conductive silver paste Download PDFInfo
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Abstract
The present invention relates to a kind of capacitive touch screen fine-line laser-induced thermal etching conductive silver paste, the conductive silver paste includes following components and parts by weight content：0~1 part of 65~80 parts of silver powder, 5~10 parts of organic carrier, 3~23 parts of organic solvent, 0.1~1 part of defoamer, 0.1~1 part of levelling agent, 0.1~1 part of anti-tangerine peel agent, 0~1 part of thixotropic agent and pigment；The preparation process of described conductive silver paste is that first organic carrier and organic solvent are mixed, it is configured to uniform colloidal solution, then other components are sequentially added, mixed through batch mixer, three-roll grinder grinding, filtering etc. is after technique, that is, capacitive touch screen fine-line laser-induced thermal etching conductive silver paste is made.Compared with prior art, preparation technology of the present invention is simple, conductive silver paste resistance obtained by preparation is low, adhesive force is strong, it can reach 5B grades with PET base material adhesive force, and case hardness is big, and hardness can reach more than 3H, it is anticorrosive, anti-oxidant, it laser etch process can be used to make the fine-line on capacitive touch screen.
Description
Technical field
The invention belongs to conductive material technical field, it is related to a kind of conductive silver paste, more particularly, to a kind of capacitance touch
Shield fine-line laser-induced thermal etching conductive silver paste and preparation method thereof.
Background technology
Capacitance-type touch screen technology is operated using the electric current sensing of human body.It is one piece of four layers of compound glass
Screen, the inner surface and interlayer of glass screen respectively scribble one layer of tin-doped indium oxide (English abbreviation ITO), and outermost layer is the native glass of a thin layer silicon
Glass protective layer.Interlayer ITO coatings draw four electrodes as working face on four angles, internal layer ITO is that screen layer is good to ensure
Working environment.When finger is touched on the metal layer, due to human body electric field, one coupling electricity of user and touch screen surface formation
Hold, for high frequency electric, electric capacity is direct conductor, and then finger siphons away the electric current of a very little from contact point.This electricity
Stream flows out from the electrode on the corner of touch-screen respectively, and flows through the distance of the electric current and finger to corner of this four electrodes
It is directly proportional, controller draws the position of touch point by the accurate calculating to this four current ratios.
In capacitive touch screen, conductive silver paste is primarily used to the electrode material for doing four sides or four pins, often
One electrode is all one group of fine conducting wire, otherwise this group of conducting wire is directly prepared into by silk-screen, or first silk-screen into
Thicker silver wire, then it is etched into fine circuit.The circuit fineness of direct silk-screen is relatively low, on the premise of yield is ensured, and one
As more than 70 μm circuit just use direct silk screen printing process；Comparatively speaking, etch process most can carefully make 30 μm even more thin
Circuit, and precision and yield are all higher.With the development of Mobile phone touch control technology, to narrow frame high-end smartphones extensively by market
Favor, so that the line width, line-spacing to touch-screen circuit require also higher.
The Chinese invention patent of Application No. 201310387410.1 discloses a kind of conductive silver paste for touch screens and its system
Preparation Method, it is by silver powder 55~70%, epoxy resin 5~15%, polyester resin 5~15%, powdered graphite 0.1~1%, two
Silicon oxide powder 1~2%, diethylene glycol ether acetate 5~15% and butyl acetate 5~15% are constituted, its
In, silver powder is 1 by mass ratio:20~1:30 micro-silver powder end and Nano Silver powder constituent, the grain at the micro-silver powder end
Footpath is 10~20 μm, and the particle diameter of the Nano Silver powder is 60~90nm, and specific preparation process is：First by the asphalt mixtures modified by epoxy resin of formula ratio
Fat, polyester resin, diethylene glycol ether acetate, butyl acetate are uniformly dispersed, and obtain organic carrier；It will match somebody with somebody again
The silver powder of side's amount, powdered graphite, SiO 2 powder are added to organic carrier and are uniformly dispersed, that is, obtain product.Above-mentioned patent
In the technical scheme of announcement, slurry is larger due to silver powder particles, deposits the technical problems such as line edges after the etching are rough.
The content of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind is used for capacitive touch
Touch conductive silver paste of screen laser-induced thermal etching fine-line technique and preparation method thereof.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of capacitive touch screen fine-line laser-induced thermal etching conductive silver paste, the conductive silver paste is including following components and again
Measure part content：65~80 parts of silver powder, 5~10 parts of organic carrier, 3~23 parts of organic solvent, 0.1~1 part of defoamer, levelling
0~1 part of 0.1~1 part of agent, 0.1~1 part of anti-tangerine peel agent, 0~1 part of thixotropic agent and pigment.
The component and parts by weight content of described conductive silver paste be preferably：70~71 parts of silver powder, organic carrier 9~10
Part, 19~20 parts of organic solvent, 0.3~0.4 part of defoamer, 0.4~0.5 part of levelling agent, 0.2~0.3 part of anti-tangerine peel agent, thixotroping
0.9~1 part of 0.8~0.9 part of agent and pigment.
Described silver powder is flake silver powder, and the particle diameter of the flake silver powder is 0.2~5 μm, and tap density is 3~4g/
ml。
Preferably 0.4~0.6 μm of the particle diameter of described flake silver powder, tap density preferably 3.5~4g/ml.
Described organic carrier is formed using macromolecule resin with organic solvent mixed preparing, and specific compound method is：Press
The mass ratio of macromolecule resin and organic solvent is 1：(3~6), macromolecule resin is added in organic solvent, heat temperature raising
To 70~80 DEG C, constant temperature, until macromolecule resin is completely dissolved, is cooled to less than 40 DEG C, entered with the screen cloth of 300~400 mesh
Row filtering and impurity removing, that is, be made organic carrier.
Described macromolecule resin is one kind or two in polyacrylic resin, polyurethane resin or saturated polyester resin
Kind, the relative molecular mass of described macromolecule resin is 20000~35000, fracture elongation>120%, glass transition temperature
Degree>10℃.
Described organic solvent is one or both of ketone or esters solvent, and the boiling range of described organic solvent is
120~230 DEG C, fusing point<-20℃；Described defoamer is one in polyethers, polysiloxane-based or polyether modified siloxane class
Kind；Described levelling agent is organic silicon or one kind of esters of acrylic acid；Described anti-tangerine peel agent is organosilicon compound；Institute
The thixotropic agent stated is gas-phase silica, and described pigment is one kind in graphite microparticles or carbon black.
The preferred cyclohexanone of described organic solvent or propylene glycol methyl ether acetate；Described defoamer preferred, polyethers modified silicon
Oxygen alkane；The preferred polyacrylate of described levelling agent；Described anti-tangerine peel agent preferably organically-modified silica alkane.
Preferred, polyethers modified siloxane can effectively suppress or eliminate slurry in preparation, stirring, work progress as defoamer
The bubble of generation, so that short-term probability when reducing fine-line printing；It is preferred that polyacrylate is as levelling agent, it can put down
The difference of weighing apparatus slurry moisture membrane surface tension force, so as to obtain the fine-line with real smooth performance；It is preferred that organically-modified oxygen alkane
As anti-tangerine peel agent, it can prevent the generation of film surface defects, and these defects are mainly irregular ripple as orange
The texture in epidermis face.
A kind of preparation method of capacitive touch screen fine-line laser-induced thermal etching conductive silver paste, this method specifically include with
Lower step：
(1) got the raw materials ready according to following components and parts by weight：
(2) preparation of conductive silver paste：In batch mixer, according to the parts by weight in step (1), first organic carrier is added to
In organic solvent, uniform colloidal solution is mixed into, defoamer, levelling agent, thixotropic agent, anti-tangerine peel agent and pigment is added, most
After add silver powder, after being sufficiently mixed, then be placed in high speed dispersor and carry out scattered at a high speed, uniform conductive silver paste is made；
(3) production of capacitive touch screen conductive silver paste：Conductive silver paste made from step (2) is added to the grinding of three rollers
It is ground in machine, 50~55 revs/min of fine setting roller rotating speed so that the fineness of conductive silver paste<10 μm, viscosity be 30~
45Pas, after filtering, that is, is made capacitive touch screen fine-line laser-induced thermal etching conductive silver paste.
The present invention is by the way that first organic carrier and organic solvent are mixed, uniform colloidal solution is configured to, then, successively
Defoamer, levelling agent, thixotropic agent, anti-tangerine peel agent and pigment are added, silver powder is eventually adding, is mixed through batch mixer, three rollers are ground
After the techniques such as grinding machine grinding, filtering, that is, capacitive touch screen fine-line laser-induced thermal etching conductive silver paste is made.
The present invention passes through the suitable silver powder of preferred particle size and its applicable macromolecule resin, organic solvent body
System, the requirement and properties of product requirement of capacitive touch screen fine-line laser etch process can be met well.
Compared with prior art, the invention has the characteristics that：
1) it is the conductive silver that 0.4~0.6 μm of flake silver powder is made especially with particle diameter due to using particle diameter for 0.2~5 μm
Slurry, during for laser etch process, results in edge very smooth circuit, and the extra fine wire etched can be with away from, line footpath
Reach 20 μm；
2) due to being configured to defoamer, levelling agent, thixotropic agent and anti-tangerine peel agent in rational ratio so that silk-screen
Conducting wire surfacing, without shrinkage cavity, without open circuit, can effectively lift the yield of silver-colored conducting wire manufacturing process；
3) macromolecule resin of suitable molecular weight is selected, it has good dissolubility in organic solvent, prepares gained
Conductive silver paste, modest viscosity, resistance is relatively low, and adhesive force is strong, and it can reach 5B grades, case hardness with PET base material adhesive force
Greatly, hardness can reach more than 3H.
Embodiment
With reference to specific embodiment, the present invention is described in detail.
Embodiment 1：
In the present embodiment, a kind of capacitive touch screen fine-line laser-induced thermal etching conductive silver paste, including following components and
Parts by weight content：70 parts of silver powder, 9 parts of organic carrier, 19 parts of organic solvent, 0.4 part of defoamer, 0.4 part of levelling agent, anti-tangerine
0.9 part of 0.2 part of skin agent, 0.8 part of thixotropic agent and pigment.
Wherein, silver powder is flake silver powder, and particle diameter is 0.4 μm, and tap density is 3.8g/ml.
The compound method of organic carrier is：It is 1 by the mass ratio of macromolecule resin and organic solvent：4, by macromolecule resin
It is added in organic solvent, is heated to 80 DEG C, constant temperature, until macromolecule resin is completely dissolved, is cooled to less than 40 DEG C,
Filtering and impurity removing is carried out with the screen cloth of 400 mesh, that is, organic carrier is made.
Macromolecule resin is polyurethane resin, and relative molecular weight is 30000, fracture elongation>120%, glass transition
Temperature>10 DEG C, organic solvent is cyclohexanone.
Specific preparation process is as follows：
(1) got the raw materials ready according to following components and parts by weight：
(2) preparation of conductive silver paste：In batch mixer, according to the parts by weight in step (1), first organic carrier is added to
In organic solvent, uniform colloidal solution is mixed into, defoamer, levelling agent, thixotropic agent, anti-tangerine peel agent and pigment is added, most
After add silver powder, after being sufficiently mixed, then be placed in high speed dispersor and carry out scattered at a high speed, uniform conductive silver paste is made；
(3) production of capacitive touch screen conductive silver paste：Conductive silver paste made from step (2) is added to the grinding of three rollers
It is ground in machine, fine setting roller rotating speed is 55 revs/min so that the fineness of conductive silver paste<10 μm, viscosity is 30Pas, soon
It is rapid to be filtered with 800 mesh polyester nets after fast agitating and heating, that is, the laser-induced thermal etching of capacitive touch screen fine-line is made conductive
Silver paste.
Wherein, defoamer is polyether modified siloxane, and levelling agent is polyacrylate, and anti-tangerine peel agent is organically-modified silica
Alkane, thixotropic agent is gas-phase silica, and pigment is graphite microparticles.
Conductive silver paste obtained by the present embodiment preparation, quantitative measurement the results are shown in Table physical property after 1, solidification before solidification
Test result is shown in Table 2.
Physical property is characterized before table 1 solidifies
Physical property is characterized after table 2 solidifies
In Tables 1 and 2, the method for testing of physical properties is：
Viscosity --- 25 DEG C of BROOKFIELD DV-I+VISCOMETER, S14,5rpm ,@, Pa.s；
Silver powder particle size --- laser particle size analyzer；
Solid content --- 135 DEG C are toasted 60 minutes；
6~10 μm of spreading area --- thickness of dry film；
Slurry sheet resistance --- universal meter；
Adhesive force --- hundred lattice test (ITO/PET films), 3M600 adhesive tapes, vertical to draw；
Hardness (H) --- Chinese pencil.
By the present embodiment prepare obtained by conductive silver paste be printed in using 400 mesh polyester nets on ITO/PET diaphragms, print
Circuit is five one group, every circuit line length 150mm, line width 8mm, after 135 DEG C are toasted 60 minutes, is etched using laser etching machine
Line-spacing, line width are 30 μm of circuit.Etching the circuit completed, line edges are clear under the microscope, and actual, measured dimension, which meets, to be set
Meter is required.
Embodiment 2：
In the present embodiment, a kind of capacitive touch screen fine-line laser-induced thermal etching conductive silver paste, including following components and
Parts by weight content：70.8 parts of silver powder, 9.4 parts of organic carrier, 19.6 parts of organic solvent, 0.3 part of defoamer, levelling agent 0.5
1 part of part, 0.3 part of anti-tangerine peel agent, 0.9 part of thixotropic agent and pigment.
Wherein, silver powder is flake silver powder, and particle diameter is 0.6 μm, and tap density is 4g/ml.
The compound method of organic carrier is：It is 1 by the mass ratio of macromolecule resin and organic solvent：4, by macromolecule resin
It is added in organic solvent, is heated to 80 DEG C, constant temperature, until macromolecule resin is completely dissolved, is cooled to less than 40 DEG C,
Filtering and impurity removing is carried out with the screen cloth of 400 mesh, that is, organic carrier is made.
Macromolecule resin is saturated polyester resin, and relative molecular weight is 24000, fracture elongation>120%, vitrifying turns
Temperature>10 DEG C, organic solvent is cyclohexanone.
Specific preparation process is as follows：
(1) got the raw materials ready according to following components and parts by weight：
(2) preparation of conductive silver paste：In batch mixer, according to the parts by weight in step (1), first organic carrier is added to
In organic solvent, uniform colloidal solution is mixed into, defoamer, levelling agent, thixotropic agent, anti-tangerine peel agent and pigment is added, most
After add silver powder, after being sufficiently mixed, then be placed in high speed dispersor and carry out scattered at a high speed, uniform conductive silver paste is made；
(3) production of capacitive touch screen conductive silver paste：Conductive silver paste made from step (2) is added to the grinding of three rollers
It is ground in machine, fine setting roller rotating speed is 55 revs/min so that the fineness of conductive silver paste<10 μm, viscosity is 40Pas, soon
It is rapid to be filtered with 800 mesh polyester nets after fast agitating and heating, that is, the laser-induced thermal etching of capacitive touch screen fine-line is made conductive
Silver paste.
Wherein, defoamer is polysiloxanes, and levelling agent is polyacrylate, and anti-tangerine peel agent is organically-modified silica alkane, is touched
Change agent is gas-phase silica, and pigment is carbon black.
Embodiment 3：
In the present embodiment, a kind of capacitive touch screen fine-line laser-induced thermal etching conductive silver paste, including following components and
Parts by weight content：It is 71 parts of silver powder, 10 parts of organic carrier, 20 parts of organic solvent, 0.4 part of defoamer, 0.5 part of levelling agent, anti-
0.9 part of 0.3 part of tangerine peel agent, 0.8 part of thixotropic agent and pigment.
Wherein, silver powder is flake silver powder, and particle diameter is 0.5 μm, and tap density is 3.5g/ml.
The compound method of organic carrier is：It is 1 by the mass ratio of macromolecule resin and organic solvent：3, by macromolecule resin
It is added in organic solvent, is heated to 78 DEG C, constant temperature, until macromolecule resin is completely dissolved, is cooled to less than 40 DEG C,
Filtering and impurity removing is carried out with the screen cloth of 400 mesh, that is, organic carrier is made.
Macromolecule resin is polyacrylic resin, and relative molecular weight is 35000, fracture elongation>120%, vitrifying turns
Temperature>10 DEG C, organic solvent is propylene glycol methyl ether acetate.
Specific preparation process is as follows：
(1) got the raw materials ready according to following components and parts by weight：
(2) preparation of conductive silver paste：In batch mixer, according to the parts by weight in step (1), first organic carrier is added to
In organic solvent, uniform colloidal solution is mixed into, defoamer, levelling agent, thixotropic agent, anti-tangerine peel agent and pigment is added, most
After add silver powder, after being sufficiently mixed, then be placed in high speed dispersor and carry out scattered at a high speed, uniform conductive silver paste is made；
(3) production of capacitive touch screen conductive silver paste：Conductive silver paste made from step (2) is added to the grinding of three rollers
It is ground in machine, fine setting roller rotating speed is 50 revs/min so that the fineness of conductive silver paste<10 μm, viscosity is 35Pas, soon
It is rapid to be filtered with 800 mesh polyester nets after fast agitating and heating, that is, the laser-induced thermal etching of capacitive touch screen fine-line is made conductive
Silver paste.
Wherein, defoamer is polyethers, and levelling agent is organosilicon, and anti-tangerine peel agent is organically-modified silica alkane, and thixotropic agent is gas
Phase white carbon, pigment is graphite microparticles.
Embodiment 4：
In the present embodiment, a kind of capacitive touch screen fine-line laser-induced thermal etching conductive silver paste, including following components and
Parts by weight content：65 parts of silver powder, 7 parts of organic carrier, 16 parts of organic solvent, 0.5 part of defoamer, 0.6 part of levelling agent, anti-tangerine
0.2 part of 0.6 part of skin agent, 0.3 part of thixotropic agent and pigment.
Wherein, silver powder is flake silver powder, and particle diameter is 0.2 μm, and tap density is 3/ml.
The compound method of organic carrier is：It is 1 by the mass ratio of macromolecule resin and organic solvent：3, by macromolecule resin
It is added in organic solvent, is heated to 80 DEG C, constant temperature, until macromolecule resin is completely dissolved, is cooled to less than 40 DEG C,
Filtering and impurity removing is carried out with the screen cloth of 300 mesh, that is, organic carrier is made.
Macromolecule resin is saturated polyester resin and polyurethane resin is 1 in mass ratio:1 mixing macromolecule resin, its
In, the relative molecular weight of saturated polyester resin is 24000, and the relative molecular mass of polyurethane resin is 30000, saturated polyester tree
The fracture elongation of fat and polyurethane resin>120%, glass transition temperature>10 DEG C, organic solvent is cyclohexanone and propane diols
Methyl ether acetate is 1 in mass ratio:2 mixed organic solvents, boiling range is 120~230 DEG C, fusing point<-20℃.
Specific preparation process is as follows：
(1) got the raw materials ready according to following components and parts by weight：
(2) preparation of conductive silver paste：In batch mixer, according to the parts by weight in step (1), first organic carrier is added to
In organic solvent, uniform colloidal solution is mixed into, defoamer, levelling agent, thixotropic agent, anti-tangerine peel agent and pigment is added, most
After add silver powder, after being sufficiently mixed, then be placed in high speed dispersor and carry out scattered at a high speed, uniform conductive silver paste is made；
(3) production of capacitive touch screen conductive silver paste：Conductive silver paste made from step (2) is added to the grinding of three rollers
It is ground in machine, fine setting roller rotating speed is 55 revs/min so that the fineness of conductive silver paste<10 μm, viscosity is 30Pas, soon
It is rapid to be filtered with 800 mesh polyester nets after fast agitating and heating, that is, the laser-induced thermal etching of capacitive touch screen fine-line is made conductive
Silver paste.
Wherein, defoamer is polyethers, and levelling agent is polyacrylate, and anti-tangerine peel agent is organically-modified silica alkane, thixotropic agent
For gas-phase silica, pigment is carbon black.
Embodiment 5：
In the present embodiment, a kind of capacitive touch screen fine-line laser-induced thermal etching conductive silver paste, including following components and
Parts by weight content：75 parts of silver powder, 8 parts of organic carrier, 18 parts of organic solvent, 0.1 part of defoamer, 0.3 part of levelling agent, anti-tangerine
0.3 part of 0.1 part of skin agent, 1 part of thixotropic agent and pigment.
Wherein, silver powder is flake silver powder, and particle diameter is 0.8 μm, and tap density is 3.3/ml.
The compound method of organic carrier is：It is 1 by the mass ratio of macromolecule resin and organic solvent：5, by macromolecule resin
It is added in organic solvent, is heated to 70 DEG C, constant temperature, until macromolecule resin is completely dissolved, is cooled to less than 40 DEG C,
Filtering and impurity removing is carried out with the screen cloth of 300 mesh, that is, organic carrier is made.
Macromolecule resin is polyacrylic resin and polyurethane resin is 1 in mass ratio:2 mixing macromolecule resin, its
In, the relative molecular weight of polyacrylic resin is 20000, and the relative molecular mass of polyurethane resin is 25000, polyacrylic acid tree
The fracture elongation of fat and polyurethane resin>120%, glass transition temperature>10 DEG C, organic solvent is cyclohexanone and propane diols
Methyl ether acetate is 3 in mass ratio:5 mixed organic solvents, boiling range is 120~230 DEG C, fusing point<-20℃.
Specific preparation process is as follows：
(1) got the raw materials ready according to following components and parts by weight：
(2) preparation of conductive silver paste：In batch mixer, according to the parts by weight in step (1), first organic carrier is added to
In organic solvent, uniform colloidal solution is mixed into, defoamer, levelling agent, thixotropic agent, anti-tangerine peel agent and pigment is added, most
After add silver powder, after being sufficiently mixed, then be placed in high speed dispersor and carry out scattered at a high speed, uniform conductive silver paste is made；
(3) production of capacitive touch screen conductive silver paste：Conductive silver paste made from step (2) is added to the grinding of three rollers
It is ground in machine, fine setting roller rotating speed is 55 revs/min so that the fineness of conductive silver paste<10 μm, viscosity is 32Pas, soon
It is rapid to be filtered with 800 mesh polyester nets after fast agitating and heating, that is, the laser-induced thermal etching of capacitive touch screen fine-line is made conductive
Silver paste.
Wherein, defoamer is polyether modified siloxane, and levelling agent is organosilicon, and anti-tangerine peel agent is organically-modified silica alkane,
Thixotropic agent is gas-phase silica, and pigment is graphite microparticles.
Embodiment 6：
In the present embodiment, a kind of capacitive touch screen fine-line laser-induced thermal etching conductive silver paste, including following components and
Parts by weight content：80 parts of silver powder, 10 parts of organic carrier, 23 parts of organic solvent, 1 part of defoamer, 1 part of levelling agent, anti-tangerine peel
0.7 part of 1 part of agent, 0.7 part of thixotropic agent and pigment.
Wherein, silver powder is flake silver powder, and particle diameter is 5 μm, and tap density is 3g/ml.
The compound method of organic carrier is：It is 1 by the mass ratio of macromolecule resin and organic solvent：6, by macromolecule resin
It is added in organic solvent, is heated to 80 DEG C, constant temperature, until macromolecule resin is completely dissolved, is cooled to less than 40 DEG C,
Filtering and impurity removing is carried out with the screen cloth of 400 mesh, that is, organic carrier is made.
Macromolecule resin is polyacrylic resin and polyurethane resin is 1 in mass ratio:3 mixing macromolecule resin, its
In, the relative molecular weight of polyacrylic resin is 30000, and the relative molecular mass of polyurethane resin is 35000, polyacrylic acid tree
The fracture elongation of fat and polyurethane resin>120%, glass transition temperature>10 DEG C, organic solvent is cyclohexanone and propane diols
Methyl ether acetate is 3 in mass ratio:4 mixed organic solvents, boiling range is 120~230 DEG C, fusing point<-20℃.
Specific preparation process is as follows：
(1) got the raw materials ready according to following components and parts by weight：
(2) preparation of conductive silver paste：In batch mixer, according to the parts by weight in step (1), first organic carrier is added to
In organic solvent, uniform colloidal solution is mixed into, defoamer, levelling agent, thixotropic agent, anti-tangerine peel agent and pigment is added, most
After add silver powder, after being sufficiently mixed, then be placed in high speed dispersor and carry out scattered at a high speed, uniform conductive silver paste is made；
(3) production of capacitive touch screen conductive silver paste：Conductive silver paste made from step (2) is added to the grinding of three rollers
It is ground in machine, fine setting roller rotating speed is 55 revs/min so that the fineness of conductive silver paste<10 μm, viscosity is 45Pas, soon
It is rapid to be filtered with 800 mesh polyester nets after fast agitating and heating, that is, the laser-induced thermal etching of capacitive touch screen fine-line is made conductive
Silver paste.
Wherein, defoamer is polysiloxanes, and levelling agent is organosilicon, and anti-tangerine peel agent is organically-modified silica alkane, thixotropic agent
For gas-phase silica, pigment is graphite microparticles.
Embodiment 7：
In the present embodiment, a kind of capacitive touch screen fine-line laser-induced thermal etching conductive silver paste, including following components and
Parts by weight content：76 parts of silver powder, 5 parts of organic carrier, 3 parts of organic solvent, 0.1 part of defoamer, 0.1 part of levelling agent, anti-tangerine
0.1 part of skin agent, 0.2 part of thixotropic agent.
Wherein, silver powder is flake silver powder, and particle diameter is 4 μm, and tap density is 3.2g/ml.
The compound method of organic carrier is：It is 1 by the mass ratio of macromolecule resin and organic solvent：4, by macromolecule resin
It is added in organic solvent, is heated to 80 DEG C, constant temperature, until macromolecule resin is completely dissolved, is cooled to less than 40 DEG C,
Filtering and impurity removing is carried out with the screen cloth of 400 mesh, that is, organic carrier is made.
Macromolecule resin is polyacrylic resin and polyurethane resin is 1 in mass ratio:1 mixing macromolecule resin, its
In, the relative molecular weight of polyacrylic resin is 20000, and the relative molecular mass of polyurethane resin is 25000, polyacrylic acid tree
The fracture elongation of fat and polyurethane resin>120%, glass transition temperature>10 DEG C, organic solvent is cyclohexanone and propane diols
Methyl ether acetate is 1 in mass ratio:1 mixed organic solvents, boiling range is 120~230 DEG C, fusing point<-20℃.
Specific preparation process is as follows：
(1) got the raw materials ready according to following components and parts by weight：
(2) preparation of conductive silver paste：In batch mixer, according to the parts by weight in step (1), first organic carrier is added to
In organic solvent, uniform colloidal solution is mixed into, defoamer, levelling agent, thixotropic agent and anti-tangerine peel agent is added, finally added
Enter silver powder, after being sufficiently mixed, then be placed in high speed dispersor and carry out scattered at a high speed, uniform conductive silver paste is made；
(3) production of capacitive touch screen conductive silver paste：Conductive silver paste made from step (2) is added to the grinding of three rollers
It is ground in machine, fine setting roller rotating speed is 55 revs/min so that the fineness of conductive silver paste<10 μm, viscosity is 38Pas, soon
It is rapid to be filtered with 800 mesh polyester nets after fast agitating and heating, that is, the laser-induced thermal etching of capacitive touch screen fine-line is made conductive
Silver paste.
Wherein, defoamer is polyethers, and levelling agent is organosilicon, and anti-tangerine peel agent is organically-modified silica alkane, and thixotropic agent is gas
Phase white carbon.
Embodiment 8：
In the present embodiment, a kind of capacitive touch screen fine-line laser-induced thermal etching conductive silver paste, including following components and
Parts by weight content：68 parts of silver powder, 6 parts of organic carrier, 12 parts of organic solvent, 0.8 part of defoamer, 0.6 part of levelling agent, anti-tangerine
0.5 part of skin agent, 0.3 part of pigment.
Wherein, silver powder is flake silver powder, and particle diameter is 2 μm, and tap density is 3g/ml.
The compound method of organic carrier is：It is 1 by the mass ratio of macromolecule resin and organic solvent：3, by macromolecule resin
It is added in organic solvent, is heated to 75 DEG C, constant temperature, until macromolecule resin is completely dissolved, is cooled to less than 40 DEG C,
Filtering and impurity removing is carried out with the screen cloth of 400 mesh, that is, organic carrier is made.
Macromolecule resin is polyacrylic resin, and relative molecular weight is 32000, fracture elongation>120%, vitrifying turns
Temperature>10 DEG C, organic solvent is propylene glycol methyl ether acetate.
Specific preparation process is as follows：
(1) got the raw materials ready according to following components and parts by weight：
(2) preparation of conductive silver paste：In batch mixer, according to the parts by weight in step (1), first organic carrier is added to
In organic solvent, uniform colloidal solution is mixed into, defoamer, levelling agent, anti-tangerine peel agent and pigment is added, is eventually adding gold
Belong to silver powder, after being sufficiently mixed, then be placed in high speed dispersor and carry out scattered at a high speed, uniform conductive silver paste is made；
(3) production of capacitive touch screen conductive silver paste：Conductive silver paste made from step (2) is added to the grinding of three rollers
It is ground in machine, fine setting roller rotating speed is 55 revs/min so that the fineness of conductive silver paste<10 μm, viscosity is 32Pas, soon
It is rapid to be filtered with 800 mesh polyester nets after fast agitating and heating, that is, the laser-induced thermal etching of capacitive touch screen fine-line is made conductive
Silver paste.
Wherein, defoamer is polyether modified siloxane, and levelling agent is organosilicon, and anti-tangerine peel agent is organically-modified silica alkane,
Pigment is graphite microparticles.
Embodiment 9：
In the present embodiment, a kind of capacitive touch screen fine-line laser-induced thermal etching conductive silver paste, including following components and
Parts by weight content：74 parts of silver powder, 7 parts of organic carrier, 17 parts of organic solvent, 0.2 part of defoamer, 0.8 part of levelling agent, anti-tangerine
0.5 part of 0.6 part of skin agent, 0.6 part of thixotropic agent and pigment.
Wherein, silver powder is flake silver powder, and particle diameter is 1 μm, and tap density is 3.4/ml.
The compound method of organic carrier is：It is 1 by the mass ratio of macromolecule resin and organic solvent：5, by macromolecule resin
It is added in organic solvent, is heated to 78 DEG C, constant temperature, until macromolecule resin is completely dissolved, is cooled to less than 40 DEG C,
Filtering and impurity removing is carried out with the screen cloth of 400 mesh, that is, organic carrier is made.
Macromolecule resin is polyacrylic resin and saturated polyester resin is 1 in mass ratio:2 mixing macromolecule resin,
Wherein, the relative molecular weight of polyacrylic resin is 20000, and the relative molecular mass of saturated polyester resin is 20000, polypropylene
The fracture elongation of acid resin and saturated polyester resin>120%, glass transition temperature>10 DEG C, organic solvent be cyclohexanone with
Propylene glycol methyl ether acetate is 3 in mass ratio:5 mixed organic solvents, boiling range is 120~230 DEG C, fusing point<-20℃.
Specific preparation process is as follows：
(1) got the raw materials ready according to following components and parts by weight：
(2) preparation of conductive silver paste：In batch mixer, according to the parts by weight in step (1), first organic carrier is added to
In organic solvent, uniform colloidal solution is mixed into, defoamer, levelling agent, thixotropic agent, anti-tangerine peel agent and pigment is added, most
After add silver powder, after being sufficiently mixed, then be placed in high speed dispersor and carry out scattered at a high speed, uniform conductive silver paste is made；
(3) production of capacitive touch screen conductive silver paste：Conductive silver paste made from step (2) is added to the grinding of three rollers
It is ground in machine, fine setting roller rotating speed is 55 revs/min so that the fineness of conductive silver paste<10 μm, viscosity is 30Pas, soon
It is rapid to be filtered with 800 mesh polyester nets after fast agitating and heating, that is, the laser-induced thermal etching of capacitive touch screen fine-line is made conductive
Silver paste.
Wherein, defoamer is polyether modified siloxane, and levelling agent is polyacrylate, and anti-tangerine peel agent is organically-modified silica
Alkane, thixotropic agent is gas-phase silica, and pigment is graphite microparticles.
Embodiment 10：
In the present embodiment, a kind of capacitive touch screen fine-line laser-induced thermal etching conductive silver paste, including following components and
Parts by weight content：67 parts of silver powder, 6 parts of organic carrier, 15 parts of organic solvent, 0.7 part of defoamer, 0.9 part of levelling agent, anti-tangerine
0.9 part of 0.7 part of skin agent, 0.7 part of thixotropic agent and pigment.
Wherein, silver powder is flake silver powder, and particle diameter is 0.2 μm, and tap density is 4/ml.
The compound method of organic carrier is：It is 1 by the mass ratio of macromolecule resin and organic solvent：4, by macromolecule resin
It is added in organic solvent, is heated to 80 DEG C, constant temperature, until macromolecule resin is completely dissolved, is cooled to less than 40 DEG C,
Filtering and impurity removing is carried out with the screen cloth of 400 mesh, that is, organic carrier is made.
Macromolecule resin is polyacrylic resin and saturated polyester resin is 1 in mass ratio:4 mixing macromolecule resin,
Wherein, the relative molecular weight of polyacrylic resin is 30000, and the relative molecular mass of saturated polyester resin is 32000, polypropylene
The fracture elongation of acid resin and saturated polyester resin>120%, glass transition temperature>10 DEG C, organic solvent be cyclohexanone with
Propylene glycol methyl ether acetate is 1 in mass ratio:1 mixed organic solvents, boiling range is 120~230 DEG C, fusing point<-20℃.
Specific preparation process is as follows：
(1) got the raw materials ready according to following components and parts by weight：
(2) preparation of conductive silver paste：In batch mixer, according to the parts by weight in step (1), first organic carrier is added to
In organic solvent, uniform colloidal solution is mixed into, defoamer, levelling agent, thixotropic agent, anti-tangerine peel agent and pigment is added, most
After add silver powder, after being sufficiently mixed, then be placed in high speed dispersor and carry out scattered at a high speed, uniform conductive silver paste is made；
(3) production of capacitive touch screen conductive silver paste：Conductive silver paste made from step (2) is added to the grinding of three rollers
It is ground in machine, fine setting roller rotating speed is 55 revs/min so that the fineness of conductive silver paste<10 μm, viscosity is 36Pas, soon
It is rapid to be filtered with 800 mesh polyester nets after fast agitating and heating, that is, the laser-induced thermal etching of capacitive touch screen fine-line is made conductive
Silver paste.
Wherein, defoamer is polyether modified siloxane, and levelling agent is organosilicon, and anti-tangerine peel agent is organically-modified silica alkane,
Thixotropic agent is gas-phase silica, and pigment is carbon black.
Embodiment 11：
In the present embodiment, a kind of capacitive touch screen fine-line laser-induced thermal etching conductive silver paste, including following components and
Parts by weight content：66 parts of silver powder, 7 parts of organic carrier, 13 parts of organic solvent, 0.8 part of defoamer, 0.7 part of levelling agent, anti-tangerine
0.6 part of 0.8 part of skin agent, 0.6 part of thixotropic agent and pigment.
Wherein, silver powder is flake silver powder, and particle diameter is 0.6 μm, and tap density is 3/ml.
The compound method of organic carrier is：It is 1 by the mass ratio of macromolecule resin and organic solvent：4, by macromolecule resin
It is added in organic solvent, is heated to 80 DEG C, constant temperature, until macromolecule resin is completely dissolved, is cooled to less than 40 DEG C,
Filtering and impurity removing is carried out with the screen cloth of 400 mesh, that is, organic carrier is made.
Macromolecule resin is polyacrylic resin and saturated polyester resin is 1 in mass ratio:3 mixing macromolecule resin,
Wherein, the relative molecular weight of polyacrylic resin is 30000, and the relative molecular mass of saturated polyester resin is 32000, polypropylene
The fracture elongation of acid resin and saturated polyester resin>120%, glass transition temperature>10 DEG C, organic solvent be cyclohexanone with
Propylene glycol methyl ether acetate is 2 in mass ratio:3 mixed organic solvents, boiling range is 120~230 DEG C, fusing point<-20℃.
Specific preparation process is as follows：
(1) got the raw materials ready according to following components and parts by weight：
(2) preparation of conductive silver paste：In batch mixer, according to the parts by weight in step (1), first organic carrier is added to
In organic solvent, uniform colloidal solution is mixed into, defoamer, levelling agent, thixotropic agent, anti-tangerine peel agent and pigment is added, most
After add silver powder, after being sufficiently mixed, then be placed in high speed dispersor and carry out scattered at a high speed, uniform conductive silver paste is made；
(3) production of capacitive touch screen conductive silver paste：Conductive silver paste made from step (2) is added to the grinding of three rollers
It is ground in machine, fine setting roller rotating speed is 50 revs/min so that the fineness of conductive silver paste<10 μm, viscosity is 42Pas, soon
It is rapid to be filtered with 800 mesh polyester nets after fast agitating and heating, that is, the laser-induced thermal etching of capacitive touch screen fine-line is made conductive
Silver paste.
Wherein, defoamer is polyether modified siloxane, and levelling agent is organosilicon, and anti-tangerine peel agent is organically-modified silica alkane,
Thixotropic agent is gas-phase silica, and pigment is graphite microparticles.
Claims (5)
1. a kind of capacitive touch screen fine-line laser-induced thermal etching conductive silver paste, it is characterised in that the conductive silver paste include with
Lower component and parts by weight content：70~71 parts of silver powder, 9~10 parts of organic carrier, 19~20 parts of organic solvent, defoamer
0.3~0.4 part, 0.4~0.5 part of levelling agent, 0.2~0.3 part of anti-tangerine peel agent, 0.8~0.9 part of thixotropic agent and pigment 0.9~1
Part；
Described silver powder is flake silver powder, and the particle diameter of the flake silver powder is 0.4~0.6 μm, and tap density is 3.5~4g/
mL；
Described organic carrier is formed using macromolecule resin with organic solvent mixed preparing, and specific compound method is：By high score
The mass ratio of subtree fat and organic solvent is 1:(3~6), macromolecule resin is added in organic solvent, is heated to 70
~80 DEG C, constant temperature, until macromolecule resin is completely dissolved, is cooled to less than 40 DEG C, carried out with the screen cloth of 300~400 mesh
Filter out miscellaneous, i.e., obtained organic carrier.
2. a kind of capacitive touch screen fine-line laser-induced thermal etching conductive silver paste according to claim 1, its feature exists
In, described macromolecule resin be one or both of polyacrylic resin, polyurethane resin or saturated polyester resin, it is described
Macromolecule resin relative molecular mass be 20000~35000, fracture elongation>120%, glass transition temperature>10
℃。
3. a kind of capacitive touch screen fine-line laser-induced thermal etching conductive silver paste according to claim 1, its feature exists
In, described organic solvent be one or both of ketone or esters solvent, the boiling range of described organic solvent for 120~
230 DEG C, fusing point<-20℃；Described defoamer is one kind in polyethers, polysiloxane-based or polyether modified siloxane class；Institute
The levelling agent stated is organic silicon or one kind of esters of acrylic acid；Described anti-tangerine peel agent is organosilicon compound；Described
Thixotropic agent is gas-phase silica；Described pigment is one kind in graphite microparticles or carbon black.
4. a kind of capacitive touch screen fine-line laser-induced thermal etching conductive silver paste according to claim 3, its feature exists
In the preferred cyclohexanone of described organic solvent or propylene glycol methyl ether acetate；Described defoamer preferred, polyethers modified siloxane；
The preferred polyacrylate of described levelling agent；Described anti-tangerine peel agent preferably organically-modified silica alkane.
5. a kind of preparation method of capacitive touch screen fine-line laser-induced thermal etching conductive silver paste as claimed in claim 1,
Characterized in that, this method specifically includes following steps：
(1) got the raw materials ready according to following components and parts by weight：
(2) preparation of conductive silver paste：In batch mixer, according to the parts by weight in step (1), first organic carrier is added to organic
In solvent, uniform colloidal solution is mixed into, defoamer, levelling agent, thixotropic agent, anti-tangerine peel agent and pigment is added, finally added
Enter silver powder, after being sufficiently mixed, then be placed in high speed dispersor and carry out scattered at a high speed, uniform conductive silver paste is made；
(3) production of capacitive touch screen conductive silver paste：Conductive silver paste made from step (2) is added in three-roll grinder
It is ground, 50~55 revs/min of fine setting roller rotating speed so that the fineness of conductive silver paste<10 μm, viscosity is 30~45Pas,
After filtering, that is, capacitive touch screen fine-line laser-induced thermal etching conductive silver paste is made.
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| CN106297955A (en) * | 2016-09-30 | 2017-01-04 | 天津宝兴威科技有限公司 | A kind of nano silver conductive paste |
| CN107236099B (en) * | 2017-06-01 | 2020-09-15 | 长兴化学工业(中国)有限公司 | Acrylate-polyurethane copolymer resin and conductive silver paste containing same |
| CN110097998B (en) * | 2018-01-31 | 2021-06-15 | 上海宝银电子材料有限公司 | Conductive silver paste for transfer printing process touch screen and preparation method thereof |
| CN110070956A (en) * | 2019-05-20 | 2019-07-30 | 深圳市博耀新材料有限公司 | A kind of nanometer silver paste and preparation method thereof for ultra fine-line laser engraving |
| CN110853795B (en) * | 2019-11-22 | 2021-08-31 | 广州精卓化工有限公司 | Laser etching type conductive silver paste and preparation method and application thereof |
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| CN1702779A (en) * | 2004-05-24 | 2005-11-30 | 上海宝银电子材料有限公司 | Conductive silver slurry for touch screen and method for manufacturing same |
| CN101770829A (en) * | 2010-03-16 | 2010-07-07 | 彩虹集团公司 | Special silver electrode paste for touch screen and preparation method thereof |
| CN103824611A (en) * | 2014-03-07 | 2014-05-28 | 广州北峻工业材料有限公司 | Laser lithography silver paste and preparation method thereof as well as touch screen |
| TW201443922A (en) * | 2013-01-18 | 2014-11-16 | Toyo Boseki | Conductive paste, conductive film, electrical circuit and touch panel |
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| CN1702779A (en) * | 2004-05-24 | 2005-11-30 | 上海宝银电子材料有限公司 | Conductive silver slurry for touch screen and method for manufacturing same |
| CN101770829A (en) * | 2010-03-16 | 2010-07-07 | 彩虹集团公司 | Special silver electrode paste for touch screen and preparation method thereof |
| TW201443922A (en) * | 2013-01-18 | 2014-11-16 | Toyo Boseki | Conductive paste, conductive film, electrical circuit and touch panel |
| CN103824611A (en) * | 2014-03-07 | 2014-05-28 | 广州北峻工业材料有限公司 | Laser lithography silver paste and preparation method thereof as well as touch screen |
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