CN101794637B - Conductive paste and light permeability conductive film and method of manufacturing the same - Google Patents
Conductive paste and light permeability conductive film and method of manufacturing the same Download PDFInfo
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- CN101794637B CN101794637B CN2010100028437A CN201010002843A CN101794637B CN 101794637 B CN101794637 B CN 101794637B CN 2010100028437 A CN2010100028437 A CN 2010100028437A CN 201010002843 A CN201010002843 A CN 201010002843A CN 101794637 B CN101794637 B CN 101794637B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/14—Non-insulated conductors or conductive bodies characterised by their form comprising conductive layers or films on insulating-supports
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0094—Shielding materials being light-transmitting, e.g. transparent, translucent
- H05K9/0096—Shielding materials being light-transmitting, e.g. transparent, translucent for television displays, e.g. plasma display panel
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Abstract
The invention provides a conductive paste and light permeability conductive film and method of manufacturing the same. The present invention provides a polymer conductive paste which has both electromagnetic wave shielding (conductive) performance and printability, can easily and inexpensively manufacture electromagnetic wave shielding film. The inventive conductive paste for gravure printing is characterized in that the conductive paste contains organic binders, conductive powders, coloring agents and organic solvents, wherein the organic solvents have high boiling point solvent whose boiling point is in the range of 240 - 330 DEG C at 760mmHg.
Description
Technical field
The present invention relates to conductive paste and light-permeable conductive film and manufacture method thereof.In more detail, relate to the conductive paste that is suitable for the manufacturing light-permeable conductive film, this light-permeable conductive film is useful as the electromagnetic display electromagnetic wave shielding filter that shielding is produced previously by displays such as CRT (cathode ray tube), PDP (plasma display), EL (electroluminescence) panels.
Background technology
In the past, one mentioned display, and representational is CRT monitor, but the substitute is recently, and FPD (flat-panel monitor) is popularized as slim TV etc.In the middle of the FPD, LCD (LCD) and PDP take the lead in popularizing, from now on, in addition to these, estimate also can further to popularize as the FED (Field Emission Display) that SED (surface-conduction-electron emission display, Surface-conduction Electron-emitter Display) etc. is attracted attention.
In so various displays, owing to generated electromagnetic waves by the driving signal of pixel etc., for example describe with PDP, CRT in the middle of above-mentioned, in order to shield the electromagnetic wave that is produced by these displays, known have an electromagnetic wave shielding filter that is configured in the display front.The electromagnetic wave shielding filter that uses in such purposes also requires electromagnetic wave shielding performance (conductivity) and light transmission.
Therefore, in order to have electromagnetic wave shielding performance (conductivity) and light transmission concurrently, known have transparent bases such as using resin film, glass in base material, and the display electromagnetic wave shielding filter that etching or the metal deposition by metal forming is provided with mesh layer on this transparent base.By the mesh layer that this metal level constitutes, its layer self is not have light transmission, therefore becomes netted mode according to plan view shape and forms pattern and a plurality of apertures (peristome) are set, thereby guarantee light transmission.But, if mesh is excessive, thereby then can more showyly influence display image, if the gross area in the hole of mesh (aperture opening ratio) is little in addition, then still can influence display image, make its deepening.In addition, if it is meticulous to constitute the line of mesh, the sheet resistance of mesh increases, and then produces broken string etc., damages original shielding properties.
In addition, all the time, the netted conductive pattern of electromagnetic wave shielding filter (conductivity mesh pattern) is to form by the Copper Foil photoetching that will be in turn laminated on the transparent base, its face is the words of light reflective, will reflect unwanted light such as extraneous light, the bright chamber contrast of fluoroscopy images is reduced, therefore usually by the face blackening (for example, with reference to patent documentation 1) of melanism processing with the layer of mesh layer itself.Therefore, operation complicates, existing problems aspect productivity ratio and cost.
As the method for boosting productivity, to the method for resin film printing conductive paste (for example proposed, with reference to patent documentation 2), but present situation is, because it is difficult to have concurrently printability and conductivity, therefore be used for guaranteeing that the plating processing of conductivity becomes necessary, the complexity of operation is not resolved.
That is, usually said polymer-type conductive paste refers to be dispersed with the material of conductive powder in organic bond, and in order to embody desired conductivity and printability, the cooperation ratio of the selection of conductive powder and conductive powder is important.As the most effective scheme that is used for improving conductivity, the method for the silver powder that cooperates a large amount of sheets is arranged.Yet if cooperate the silver powder of a large amount of sheets, it is too high that the thixotropy of conductive paste can become, and the printability in gravure processes reduces, and therefore, is not suitable for forming the purposes of the such fine line of conductivity mesh pattern.On the other hand, in order to form fine line, there is the particle of the silver powder of making to attenuate, and reduces the method for use level, but be difficult to come in contact between the conductive powder in the conductive paste, can not obtain bringing into play the conductivity of electromagnetic wave shielding performance degree.Therefore, under the situation of polymer-type conductive paste, be used for guaranteeing that the plating processing etc. of conductivity is necessary.
Like this, actual conditions are can make the method for the electromagnetic shielded film that has electromagnetic wave shielding performance (conductivity) and printability concurrently easy and at an easy rate and be applicable to that the polymer-type conductive paste of this method is non-existent.
The prior art document
Patent documentation
Patent documentation 1: Japanese kokai publication hei 10-335884 communique
Patent documentation 2: TOHKEMY 2000-13088 communique
Summary of the invention
The problem that invention will solve
The present invention carries out in view of described actual conditions, and its purpose is, provides to have electromagnetic wave shielding performance (conductivity) and printability concurrently, can make the polymer-type conductive paste of electromagnetic shielded film easy and at an easy rate.
For the scheme of dealing with problems
So, want to make the polymer-type conductive paste without plating processing etc. and guarantee conductivity (electromagnetic wave shielding performance), compare with China ink with existing typography (Graphic Arts), then need to improve the cooperation ratio of powder.Therefore, exist the paste drying to be inclined to faster, the result is when printing (transfer printing) with printing machine etc., black donor rollers drying, the bad problem of transfer printing in the printing process continuously can take place, and particularly become the reason that the printability (transfer printing) of photogravure etc. reduces.
The inventor furthers investigate the improvement of this printability, found that, the variation of the viscosity that the drying of paste causes in the printing process can influence printability (transfer printing).
And then the inventor is conceived to this viscosity, in order to keep good viscosity, furthers investigate.Found that, by using high boiling solvent as organic solvent, can obtain to have concurrently the conductive paste of printability (transfer printing) and conductivity, thereby finish the present invention.
Namely, photogravure conductive paste of the present invention, it is characterized in that this conductive paste contains organic bond, conductive powder, colouring agent and organic solvent, the boiling point that aforementioned organic solvent contains under 760mmHg is the high boiling solvent of 240～330 ℃ of scopes.
In the present invention, preferred aforementioned organic solvent contains aforementioned high boiling solvent with the ratio of 25～100 quality %.
In the present invention, consider from the viewpoint of printability that the preferred aforementioned number-average molecular weight that the agent adhesive arranged is 3000～50000 scope.
In the present invention, consider from the viewpoint that has conductivity and printability concurrently that in quality criteria, preferred aforementioned have the use level of agent adhesive, conductive powder and colouring agent to satisfy following relation:
Use level≤26 of 12≤(use level of the use level+colouring agent of conductive powder)/organic bond.
In the present invention, the viscosity value of preferred paste is 5～35 scope.
In addition, light-permeable conductive film of the present invention is characterized in that, possesses the netted conductive pattern that uses above-mentioned conductive paste to form at transparent resin film.
And then the manufacture method of light-permeable conductive film of the present invention is characterized in that, uses above-mentioned conductive paste to form netted conductive pattern by gravure processes at transparent resin film.
Here, in the present invention, viscosity value is to use rotation viscometer (Rotarytackmeter) (common first names: the measured value after 30 seconds under 30 ℃, 400 conditions of changeing black tensiometer (inkometer)).
The invention effect
By the present invention, can provide to have electromagnetic wave shielding performance (conductivity) and printability concurrently, can make the conductive paste of electromagnetic shielded film easy and at an easy rate.As a result, the conductive paste of the application of the invention, it is thin and keep high aperture to form the live width of net-like pattern, and has the display light-permeable conductive film of high electromagnetic wave shielding performance and the transparency (visuality).And conductive paste of the present invention only just can be guaranteed sufficient conductivity by printing, and then, owing to be colored in advance, therefore, do not need subsequent handlings such as plating, melanism processing, can be with lower cost manufacturing.And, owing to by using high boiling solvent can suppress the drying of conductive paste when printing, can keep the viscosity that is fit to printing, therefore can stably provide light transmission favorable conductive film.
Description of drawings
Fig. 1 represent about embodiment 1,2 and the viscosity value of the conductive paste put down in writing of comparative example 2 through the time figure that changes.
Fig. 2 represent the conductive paste put down in writing about embodiment 6 viscosity value through the time figure that changes.
Embodiment
Below, conductive paste of the present invention is described.
The agent adhesive that has that constitutes conductive paste of the present invention is remaining in also filming after drying, the curing, is used for giving all rerum naturas such as adaptation, resistance to bend(ing), hardness, and then gives printing necessary important component.As such the agent adhesive arranged, so long as it is just unqualified to give the material of paste printing, can enumerate for example mylar, urethane-modified polyester, epoxy modified polyester resin, various modified polyester resins such as acrylic acid modified polyester resin, the polyethers carbamate resins, the Merlon carbamate resins, the propenoic methyl carbamate resin, the trichloroactic acid vinyl ester copolymers, epoxy resin, phenolic resins, acrylic resin, the polyvinyl butyral resin, polyamidoimide, polyimides, polyamide, NC Nitroncellulose, acetylbutyrylcellulose (CAB), cellulose acetate propionate modified celluloses such as (CAP) class etc.
Wherein, in base material, use under the situation of resin film, consider preferred polyester resin, acrylic resin, polyvinyl butyral resin, modified polyester resin, trichloroactic acid vinyl ester copolymers, copolymer polyester resin etc. from resistance to bend(ing) with to the aspect of the adaptation of base material
As organic bond, more specifically, using number-average molecular weight (Mn) is that the organic bond of 3000～50000, more preferably 5000～30000 scope is suitable.If number-average molecular weight less than 3000, the transfer when easily printing taking place is bad and be difficult to form the good electrical conductivity pattern, so not preferred.On the other hand, if number-average molecular weight surpasses 50000, the whisker defects that the easy wire drawing that produces paste causes during printing, the fluctuating of line etc. also damage printability, so not preferred.In addition, number-average molecular weight is to utilize the value of the polystyrene standard conversion of gel dialysis chromatography (GPC) mensuration.
Conductive powder as constituting conductive paste of the present invention as long as can give compositions conductive, can use conductive powder arbitrarily.As such conductive powder, can enumerate Ag, Au, Pt, Pd, Ni, Cu, Al, Sn, Pb, Zn, Fe, Ir, Os, Rh, W, Mo, Ru etc.These conductive powders are not limited to use with the form of simple substance, also can use with the form of alloy, oxide.And then, can also use tin oxide (SnO
2), indium oxide (In
2O
3), ITO (tin indium oxide, Indium TinOxide) etc.As its shape, can use spherical, sheet, different shape such as dendritic, especially from printability, dispersedly consider, preferably use with spherical powder as main body.
With the nonvolatile component of conductive paste (in drying process not from paste volatilization and remain in composition in the film) be benchmark, the suitable cooperation ratio of conductive powder is 85～95 quality %, the scope of 90～94 quality % more preferably.
Under the situation of using spherical conductive powder, the suitable particle diameter of conductive powder is: use electron microscope (SEM) to be 0.1～5 μ m, to be preferably the size of 0.4～2.0 μ m with the average grain diameter of any 10 conductive powders of 10000 times of observations.During this average grain diameter less than 0.1 μ m, be difficult to produce contact between the conductive powder, conductivity reduces.On the other hand, when average grain diameter surpassed 5 μ m, so the linearity at line edge when being difficult to obtain printing was not preferred.In addition, the preferred conductive powder that uses average grain diameter 0.5～3.5 μ m size that records by Particle Size Analyzer (Microtrac).
In addition, under the situation of the conductive powder that uses sheet, preferably use following conductive powder: use electron microscope (SEM) to be 0.1～10 μ m, to be preferably the conductive powder of 0.4～5.0 μ m size with the average grain diameter of any 10 conductive powders of 10000 times of observations.During this average grain diameter less than 0.1 μ m, be difficult to produce contact between the conductive powder, conductivity reduces, and on the other hand, when average grain diameter surpassed 10 μ m, so the linearity at line edge when being difficult to obtain printing was not preferred.In addition, the preferred conductive powder that uses average grain diameter 0.5～7.0 μ m size that records by Particle Size Analyzer.
As such conductive powder, preferred silver powder, at this moment, it is 0.01～2.0m that silver powder is preferably used specific area
2/ g, be preferably 0.5～1.5m
2The powder of/g.The not enough 0.01m of this specific area
2During/g, Shen easily takes place during preservation fall, on the other hand, specific area surpasses 2.0m
2During/g, owing to the oil suction quantitative change damages the flowability of paste greatly, so not preferred.
The colouring agent that constitutes conductive paste of the present invention uses for visuality conductive paste is painted and the raising display.Its kind, shape are not particularly limited, and can use known colouring agent commonly used.The color of colouring agent is so long as have for suppressing that extraneous light reflects in display applications to be the suitable color that sufficient brightness reduces, just can to use colouring agent arbitrarily, the black that preferably list blueness, black, is formed by 3 color contamination looks etc.Especially black is suitable, can use carbon black, solvent black, oil black etc., and from the considerations such as easy degree that obtain, colorant is suitable with carbon black.For example, can list channel black, furnace black or colorant such as dim with carbon black and conductive carbon black, acetylene black etc. as carbon black.
The use level of such colouring agent can be used use level arbitrarily so long as can be coloured to object brightness, with respect to 100 mass parts organic bonds, is preferably 5～100 mass parts, more preferably 10～80 mass parts.In addition, colouring agent can use arbitrary form of powder, dispersion liquid.
During use level less than 5 mass parts of colouring agent, the brightness of paste uprises, and so the visual variation of display is not preferred.On the other hand, a large amount of cooperation even if surpass 100 mass parts, can produce also that viscosity significantly rises, thixotropy is crossed problems such as height, so not preferred.
The organic solvent that constitutes conductive paste of the present invention is be used to the viscosity of keeping conductive paste, gives the neccessary composition of good printability.As such organic solvent, the boiling point that must contain under 760mmHg is the high boiling solvent of 240～330 ℃ of scopes, and preferably the ratio with 25～100 quality % contains aforementioned high boiling solvent in organic solvent.More preferably the ratio with 35～100 quality % contains.During the ratio less than 25 quality % of high boiling solvent, it is dry that paste dry too fast causes printing process to take place, and is difficult to carry out good printing (transfer printing), so not preferred.In addition, by cooperating high boiling solvent, do not carry out plating processing etc. and just can guarantee conductivity (electromagnetic wave shielding performance).
As such high boiling solvent, can enumerate diamyl benzene (260～280 ℃ of boiling points), 3 penta benzene (300～320 ℃ of boiling points), n-dodecane alcohol (255～259 ℃ of boiling points), diethylene glycol (245 ℃ of boiling points), butyl carbitol acetate (247 ℃ of boiling points), dibutyl ethylene glycol ether (255 ℃ of boiling points), diethylene glycol monoacetate (250 ℃ of boiling points), triethylene glycol (276 ℃ of boiling points), triethylene glycol monomethyl ether (249 ℃ of boiling points), Triethylene glycol ethyl ether (256 ℃ of boiling points), triethylene glycol butyl ether (271 ℃ of boiling points), TEG (327 ℃ of boiling points), TEG monobutyl ether (304 ℃ of boiling points), tripropylene glycol (267 ℃ of boiling points), tripropylene glycol monomethyl ether (243 ℃ of boiling points), 2,2,4-trimethyl-1,3-pentanediol list isobutyl ester (253 ℃ of boiling points) etc.In addition, be hydro carbons as oil, can also enumerate AF SOLVENT4 number (240～265 ℃ of boiling points) that Nippon Oil(Nippon Mitsubishi Oil) (strain) produces, No. 5 (boiling point=275～306 ℃), No. 6 (296～317 ℃ of boiling points), No. 7 (259～282 ℃ of boiling points) and No. 0 SOLVENT H (245～265 ℃ of boiling points) etc., can comprise as required in these more than 2 kinds.
Wherein, consider suitable triethylene glycol derivative or the tripropylene glycol derivative of using from viewpoints such as dissolubility that the agent adhesive is arranged, boiling points.
In addition, as the organic solvent except above-mentioned high boiling solvent, as long as can be dissolved with the agent adhesive, can use known organic solvent commonly used.Can enumerate for example toluene, dimethylbenzene, ethyl acetate, butyl acetate, methyl alcohol, ethanol, isopropyl alcohol, isobutanol, 1-butanols, diacetone alcohol, ethylene glycol monobutyl ether, propanedione list methyl alcohol, dihydroxypropane single-ether, propylene glycol methyl ether acetate, terpineol, methylethylketone, carbitol, carbitol acetic acid esters, butyl carbitol etc., can comprise as required in these more than 2 kinds.
Adjustment contains the use level of the organic solvent of such high boiling solvent, so that paste is adjusted to the viscosity that is fit to photogravure, and for example 50～1000dPas, 100～750dPas more preferably.During the viscosity of conductive paste is not enough 50dPas, the easy attenuation of the thickness of the pattern that is printed, the sheet resistance of the conductive pattern that obtains uprises, so not preferred.On the other hand, when viscosity surpassed 1000dPas, owing to be difficult to carry out with scraper the scraping of paste when photogravure, printing was bad dirty version (paste is being paid in non-setting-out portion) to take place easily, ooze out etc., so not preferred.In addition, the viscosity of paste is to use cone-plate type viscosimeter among the present invention, is 10s in shear rate
-1, the value that records under 25 ℃ the condition.
In the conductive paste of above explanation, in order to obtain more excellent printability and conductivity, in quality criteria, preferred aforementioned have the use level of agent adhesive, conductive powder and colouring agent to satisfy following relation:
Use level≤26 of 12≤(use level of the use level+colouring agent of conductive powder)/organic bond,
More preferably satisfy following relation:
Use level≤21 of 13≤(use level of the use level+colouring agent of conductive powder)/organic bond.
In order to obtain good printability, make that the viscosity value of paste is also very important in suitable scope.The viscosity value of conductive paste of the present invention is preferably 5～35, more preferably 10～30 scope.If viscosity value less than 5, the metastatic difference of paste causes the tendency that the thickness attenuation after printing quality deterioration, the printing causes sheet resistance to uprise when then having printing, so not preferred.On the other hand, if viscosity value surpasses 35, when printing, be printed fluffing (being printed breaking of thing), the paperboard (be printed thing and stop up printing machine) of thing easily, so not preferred.
In addition, in the scope of not damaging printability, can cooperate additives such as crosslinking agent, metal dispersion, thixotropy imparting agent, defoamer, levelling agent, surface tension reducer, diluent, plasticizer, antioxidant, metal deactivation agent, coupling agent, filler in the conductive paste of the present invention.
Light-permeable conductive film of the present invention is by the conductive paste photogravure of above detailed description is formed netted conductive pattern to transparent bases such as resin film, and is dried and solidifies and obtain.The conductive paste of the application of the invention can provide a kind of light-permeable conductive film, and its unreal plating is applied to handle and just can be given this film sufficient conductivity, and has excellent electromagnetic wave shielding performance.
Here, resin film as above-mentioned transparent base, for example can enumerate the resin film that is formed by mylar, acrylic resin, polycarbonate resin, polyethersulfone resin, acrylic resin, primary cellulose acetate resin, dcpd resin, norbornene resin, carbamate resins etc.Hard conating, easy adhesive linkage, demoulding processing layer, electric conductive polymer layer, black receiving layer etc. can be set on the surface of film as required, can also implement plasma treatment etc. in addition.The thickness of film is generally 20～800 μ m.
In addition, the version for the such intaglio printing of photogravure (Gravure Printing) can be by waiting to make a plate to the rotary drum (cylinder) that is formed by copper, 42 alloys, glass etc., dull and stereotyped surface enforcement photomechanical process, laser.Can implement chromium plating processing, DLC (diamond-like-carbon) processing as required, improve the durability of intaglio plate.
In the present invention, netted conductive pattern can be for example triangle, quadrangle, pentagon, other N limit shape clathrates such as (N are the integer more than 6), can also be patterns such as round, blade profile, also can be unsetting.On the other hand, the live width of this pattern is generally 10～80 μ m, is preferably 10～40 μ m, and in addition, the line of this pattern is spaced apart 100～500 μ m, is preferably 125～500 μ m.When live width, line were excessive at interval, the conductive pattern of resulting light-permeable conductive film became obviously easily, when being used as the front panel of display, had the tendency of the visuality reduction of picture.In addition, when the line interval too small, the conductive pattern of resulting light-permeable conductive film attenuates (it is many that the radical of the line of per unit area becomes), and the transmissivity of luminous ray reduces, and when being used as the front panel of display, has the tendency of picture deepening.In addition, exist live width more little, more be difficult to form the tendency of uniform pattern, therefore, as described above, be fit to more than the 10 μ m.
In addition, because conductive paste of the present invention is colored in advance, does not therefore need to carry out melanism and handle, only just can obtain the light-permeable conductive film of excellent electric conductivity by printing and dry (or curing).This film is suitable to be used as purposes such as electromagnetic wave shielding devices.
As required, the light-permeable conductive film that makes like this can be implemented antireflection and handle, is used for reprocessings such as the painted processing of color correction, near-infrared absorbing processing.At this moment, the purposes as the front panel of plasma scope is fit to.In addition, but in light-permeable conductive film lamination be used for to paste pay in the adhesive of display.
Embodiment
Below, embodiment being shown and comparative example more specifically describes the present invention, following embodiment just is used for illustration the present invention, does not limit the present invention.In addition, if not otherwise specified, following " part " is all represented " mass parts ".
Embodiment 1～6 and comparative example 1～2
Cooperate each composition according to the cooperation ratio shown in the table 1, with the mixing conductive paste that obtains of 3 roll-type mixing rolls.In addition, mixing back is adjusted to 500dPas with organic solvent with viscosity, estimates then.
[table 1]
Conductivity, printing, dry strength and viscosity value for the various conductive pastes that obtain are like this estimated.Evaluation method is as described below.
(1) evaluation of conductivity
The various conductive paste patterns that obtain are printed on the glass substrate, form the pattern of 0.5cm * 10cm, carry out 120 ℃ * 30 minutes heat treated, form the conductive pattern of 0.5cm * 10cm.Adopt the four-terminal method that uses milliohm instrument (Milliohm high tester) to measure sheet resistance (sheet resistance) value to this conductive pattern, calculate resistivity value by this thin layer measured value and thickness, estimate conductivity.
(2) evaluation of printing
The various conductive pastes that will obtain by photogravure are printed on polyester film (TOYOBO CO., COSMOSHINE A4300,100 μ m that LTD makes are thick) on, carry out 120 ℃ * 30 minutes heat treated, make the light-permeable conductive film that is formed with cancellate conductive pattern.Here, the chromium plating intaglio plate that uses in photogravure is formed with the grid pattern of live width 20 μ m, version dark 10 μ m, spacing 300 μ m.
For the light-permeable conductive film of such making, observe its cancellate conductive pattern, confirm that it has or not dirty version (paste adheres to non-setting-out portion), whisker defects, photographic fog, estimates printing.Metewand is as follows:
Zero: do not have dirty version, whisker defects, photographic fog fully
△: observe a little dirty version, whisker defects, photographic fog
*: observing whole face has dirty version, whisker defects, photographic fog
In addition, measure the viscosity value of various conductive pastes, estimate the relation of printing and viscosity value.The viscosity value of this conductive paste uses rotation viscometer (Toyo SeikiSeisaku-SHO, the Ltd title that manufactures a product: Digtal inkometer), measure under the condition behind 30 ℃, rotating speed 400rpm * 30 second.
(3) evaluation of transfer printing
The conductive paste that obtains is filled into the setting-out portion of chromium plating intaglio plate of the grid pattern that is formed with live width 20 μ m, version dark 10 μ m, spacing 300 μ m, placed 2 minutes.Afterwards, polyester film is pressed into makes on the intaglio plate that is filled with paste that paste is transferred on the polyester film, carry out 120 ℃ * 30 minutes dryings, estimate the ageing stability of the transfer printing that relates to conductive paste.Metewand is as follows.
Zero: pattern all is transferred, and the setting-out of intaglio plate can be reproduced well.
△: the part of pattern is not transferred, and can confirm has partial disconnection, shortcoming.
*: pattern all is not transferred, and can not form setting-out.
These the results are shown in table 2.By result shown in this table 2 as can be known, by conductive paste of the present invention, can provide to have conductivity and printing (transfer printing) concurrently, can make the conductive paste of electromagnetic shielded film easy and at an easy rate.And then think that conductive paste of the present invention therefore for photogravure, is the paste that can give the stabilisation of quality owing to relate to the ageing stability excellence of transfer printing.
[table 2]
In addition, for embodiment 1,2,6 and comparative example 2 described conductive pastes, measure through the time viscosity value, it is changed pictorialization.The figure shows in Fig. 1 and Fig. 2.By this result shown in Figure 1 as can be known, it is that time more than 5 is longer that the described conductive paste of embodiment can be kept viscosity value, is more than 60 seconds.Compare with the conductive paste of comparative example, relate to the ageing stability excellence of transfer printing.
Claims (5)
1. photogravure conductive paste, it is characterized in that, this conductive paste contains organic bond, conductive powder, colouring agent and organic solvent, described organic solvent is the solvent of 240～330 ℃ of scopes with the boiling point that the ratio of 25～100 quality % contains under the 760mmHg, and the number-average molecular weight of described organic bond is 3000～50000 scope;
In quality criteria, the use level of described organic bond, conductive powder and colouring agent satisfies following relation:
Use level≤26 of 12≤(use level of the use level+colouring agent of conductive powder)/organic bond.
2. conductive paste according to claim 1 is characterized in that, the viscosity value of paste is 5～35 scope.
3. a conductive film is characterized in that, possesses the conductive pattern that right to use requires 1 or 2 described conductive pastes to form at film.
4. a light-permeable conductive film is characterized in that, possesses the netted conductive pattern that right to use requires 1 or 2 described conductive pastes to form at transparent resin film.
5. the manufacture method of a light-permeable conductive film is characterized in that, its right to use requires 1 or 2 described conductive pastes to form netted conductive pattern by gravure processes at transparent resin film.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009010324 | 2009-01-20 | ||
| JP2009-010324 | 2009-01-20 |
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| Publication Number | Publication Date |
|---|---|
| CN101794637A CN101794637A (en) | 2010-08-04 |
| CN101794637B true CN101794637B (en) | 2013-08-07 |
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| CN2010100028437A Active CN101794637B (en) | 2009-01-20 | 2010-01-20 | Conductive paste and light permeability conductive film and method of manufacturing the same |
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| JP (1) | JP5460348B2 (en) |
| KR (2) | KR20100085855A (en) |
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| TWI532059B (en) * | 2011-03-31 | 2016-05-01 | Taiyo Holdings Co Ltd | Conductive paste, conductive pattern formation method and conductive pattern |
| TWI570197B (en) * | 2011-03-31 | 2017-02-11 | Taiyo Holdings Co Ltd | Conductive paste |
| JP6001265B2 (en) * | 2011-12-21 | 2016-10-05 | 太陽ホールディングス株式会社 | Conductive paste |
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| JP2005225700A (en) * | 2004-02-12 | 2005-08-25 | Sumitomo Osaka Cement Co Ltd | Indium tin oxide fine particle, coating for forming transparent conductive film, transparent conductive film and display apparatus, and method of manufacturing transparent conductive film |
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| WO2008111757A1 (en) * | 2007-03-09 | 2008-09-18 | Dongjin Semichem Co., Ltd | Black paste composition having conductivity property, filter for shielding electromagnetic interference and display device comprising the same} |
| JP2009074143A (en) * | 2007-09-21 | 2009-04-09 | Bridgestone Corp | Method for producing conductive sheet |
| JP2009181917A (en) * | 2008-01-31 | 2009-08-13 | Sumitomo Metal Mining Co Ltd | Colored conductive film, and colored conductive paint |
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| CN1476287A (en) * | 2002-07-17 | 2004-02-18 | �ձ�������ҵ��ʽ���� | Copper size and wiring board using same |
| CN101072651A (en) * | 2004-12-22 | 2007-11-14 | 三井金属矿业株式会社 | Superfine copper powder slurry and production method thereof |
| CN101151682A (en) * | 2005-05-25 | 2008-03-26 | 住友电气工业株式会社 | Conductive paste and wiring board using it |
| CN101290816A (en) * | 2007-04-18 | 2008-10-22 | 第一毛织株式会社 | Paste composition, display device including the same, and associated methods |
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| JP5460348B2 (en) | 2014-04-02 |
| JP2010192429A (en) | 2010-09-02 |
| KR20130040976A (en) | 2013-04-24 |
| KR101369023B1 (en) | 2014-02-28 |
| CN101794637A (en) | 2010-08-04 |
| KR20100085855A (en) | 2010-07-29 |
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