CN104766674A - Method for manufacturing flexible transparent conductive film - Google Patents
Method for manufacturing flexible transparent conductive film Download PDFInfo
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- CN104766674A CN104766674A CN201410002888.2A CN201410002888A CN104766674A CN 104766674 A CN104766674 A CN 104766674A CN 201410002888 A CN201410002888 A CN 201410002888A CN 104766674 A CN104766674 A CN 104766674A
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Abstract
The invention discloses a method for manufacturing a flexible transparent conductive film to solve the problem that linear conductive materials in conductive ink cannot form a good network-shaped conductive layer and the conductivity of the conductive layer is affected as linear conductive ink flows in a fixed direction and most linear conductive materials in the conductive ink are longitudinally arranged according to the flow direction of ink due to the action of pressing force between a spindle roller and a transfer roller when a flexible transparent conductive film is manufactured by a transfer mode in the prior art. The method comprises the steps of imprinting transparent conductive ink containing linear conductive materials to a flexible transparent substrate by an intaglio printing mode, and curing the transparent ink to obtain a transparent conductive layer with a fixed pattern. By adopting the method, the linear conductive materials in the conductive ink can be in overlap joint to form a good network-shaped conductive layer in the process of manufacturing a flexible transparent conductive film, thus improving the conductivity of the conductive layer.
Description
Technical field
The present invention relates to field of flexography, in particular to a kind of manufacture method of flexible transparent conducting film.
Background technology
Nesa coating refers to there is higher light transmittance in visible-range, high conductive thin-film material, it also has good optical clarity and surface conductivity simultaneously, is widely used in the products such as liquid crystal display, touch-screen, OLED and thin-film solar cells.According to the difference of electric conducting material, the nesa coating of application at present is mainly divided into: metal system, oxidation film system (or claiming semiconductor), polymeric membrane system, compound film system and other nesa coatings etc.Metal system nesa coating on market is mainly with metal grid mesh behavior master, and it can adopt again etching method, fibrage method, print process and silver salt method to make.Print process wherein has the advantages such as cost is low, pliability good, sheet resistance is adjustable.The selection of electric conducting material is then main mainly with linear nanometer conductive material, and the liquid flux of such as nano-silver thread, carbon nano-tube etc. realizes.Linear nano conductive liquid is utilized to be generally undertaken by the mode of transfer printing to print nesa coating, adopt in this way manufacture nesa coating time, under the extruding force effect between the principal axis roller and transfer roll of transfer interpreter, line style electrically conductive ink can produce the fixing flow direction, cause the large portion line style electric conducting material meeting longitudinal arrangement in electrically conductive ink, so then can make electrically conductive ink in the dried or cured, be in the negligible amounts of the line style electric conducting material of mutual overlap joint state, good network-like body conductive layer can not be formed, affect the conductivity of conductive layer.
And other trans-printing, there is the problem that efficiency is low, consistency is poor, and also there is the deficiency such as half tone quick abrasion, quality instability in the mode of silk screen printing.
Summary of the invention
Object of the present invention be exactly to solve existing printing technology for silver-colored line ink or coating print transparent conducting coating produce the problem of non-uniform phenomenon.
The mode of intaglio printing is used to be impressed on flexible and transparent base material by disposable for the electrically conducting transparent ink containing line style electric conducting material, solidify the transparency conducting layer that described transparent ink obtains having fixed pattern, it is network-like that the line style electric conducting material in described transparency conducting layer overlaps formation mutually.
Effect of the present invention is: can not produce due to directed flow that extruding force is formed during the printing of the silver-colored line coating printed, and the problem that the coating caused therefrom is uneven, and efficiency is high, the coating uniform printed.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in further detail the embodiment of the present invention below in conjunction with embodiment.
The invention provides a kind of manufacture method of flexible transparent conducting film, when adopting the mode of transfer printing to print flexible transparent conducting film in order to solve in prior art, good network-like conductive layer can not be formed owing to causing line style electrically conducting transparent ink under the extruding force effect between the principal axis roller and transfer roll of transfer interpreter, affect the problem of the conductivity of conductive layer, and the problem of bat printing and silk-screen.
Embodiment 1
The method of the manufacturing flexible nesa coating of the present embodiment comprises the following steps:
Step 101: use the mode of intaglio printing to be impressed on flexible and transparent base material by disposable for the electrically conducting transparent ink containing line style electric conducting material;
Step 102: curing transparent ink obtains the transparency conducting layer with fixed pattern.
Wherein, the line style electric conducting material in the transparency conducting layer that the transparent ink after solidification is formed mutually overlaps and forms network-like coating.Before above-mentioned steps 101, also need to carry out the configuration of electrically conducting transparent ink and scribing of intaglio plate, below respectively for forme scribe and the configuration of electrically conductive ink describes in detail.
Scribing of forme: intaglio printing print picture deep or light level be determined by the size of pit and the depth, if pit is comparatively dark, then the ink contained is more, and the layer of ink after impression, stock stayed is just thicker; If contrary pit is more shallow, then the quantity of ink contained is just less, and the layer of ink after impression, stock stayed is just thinner.Here can comprehensively to the depth and the size that in practical application, the requirement of the requirement of the electric conductivity of conductive layer and transparency are suitably adjusted to the pit on intaglio plate.In order to ensure the transparency of flexible transparent conducting film, the conductive layer of printing preferably has consistent thickness, therefore when making forme, can, by the degree of depth of the pit on forme engraving for consistent, also can be the different degree of depth.
When the flexible transparent conducting film of the present embodiment is the diaphragm being exclusively used in touch-screen, in order to increase the function of some personalizations, in the region of conducting film that can be corresponding in the conventional tap regions with touch-screen, print transparent conductive patterns.Therefore, the entirety of the pattern formed for the zones of different that can be dispersed in transparent base for multiple independently pattern of the fixed pattern on above-mentioned flexible and transparent base material is printed on.Particularly, these independently pattern can to overlap with the conventional application touch area of touch-screen respectively or adjacent, to realize calling or controlling of specific function or application.Particularly, each pattern can be hollow out, can improve the transparency of conductive layer so further.When engraved printing formes, the grid of carve proper alignment on forme can be taked to form multiple cuboid.When printing, electrically conducting transparent ink is filled in the pit of forme, and the excess ink of plate surface is wiped off by blade coating machine, and forme and stock have certain pressure and contact, by the printing ink transfer in pit on stock.Gridline intaglio is become to have the lines of certain depth, being uniformly distributed of ink can be guaranteed, reduce the difficulty of printing, improve the success rate that one-step print is shaping.Certainly scribing of forme is not limited to this kind of mode herein, can also be other specific patterns.Be not specifically limited herein.
The preparation of electrically conductive ink: preferably, in view of the electric conductivity of flexible transparent conducting film and the requirement of transparency two indices, the line style electric conducting material in the present embodiment account for 0.2% to 1% of electrically conductive ink component.In view of the electric conductivity of silver is excellent, above-mentioned line style electrically conducting transparent ink can be preferably the dispersion liquid of nano-silver thread, and the diameter of silver-colored line is 30-60 nanometer, and length is 15-20 micron.Particularly, can come to allocate particularly according to the impact of nano-silver thread dispersion liquid concentration on flexible transparent conducting film surface resistance value.Above-mentioned line style electrically conducting transparent ink also can be the mixed liquor of nano-silver thread and volatile solvent, like this, this electrically conductive ink is printed on after on flexible and transparent base material, after volatile solvent volatilizees completely, the only remaining transparent netted conductive layer be made up of line style electric conducting material.Wherein volatile solvent can be methyl alcohol, ethanol, isopropyl alcohol, n-butanol, acetone, butanone, oxolane, propylene glycol monomethyl ether, change the organic solvents such as ethanol.In order to improve tack and the stability of the conductive layer be printed on transparent flexible base material further, transparent binding agent can be added in the electrically conducting transparent ink used.Preferably, the interpolation of binding agent can account for 5% to 10% of ink component.The transparent ink simultaneously adding binding agent can also increase the viscosity of electrically conducting transparent ink, reduce its mobility, then further reduce vibrations ink being produced due to the effect of external force in printing process, and then ensure that being uniformly distributed of line style electric conducting material in ink, ensure that the electric conductivity of conductive layer simultaneously.It should be noted that, binding agent herein can for having the polymer of certain adhesive property, be specifically as follows hydrophily transparent resin acrylic resin, silicone grease or polyurethane, also for the mixture of the mixture of polyurethane and polyurethane curing agent thereof, organic siliconresin and containing hydrogen silicone oil and catalyst or the well thermosetting epoxy resin of bending property and the mixture of curing agent can be had.
The flexible transparent conducting film being applied to the diaphragm of touch-screen often requires higher to the transparency; based on this; in order to improve the transparency of conductive layer; containing the medium with light diffuse scattering ability in the line style electrically conducting transparent ink that printing flexible transparent conducting film uses, can adjust according to accounting for 1% to 20% of the component of electrically conducting transparent ink to transparent specific requirement to the light diffusely scattering media added.
Embodiment 2
The method of the present embodiment manufacturing flexible nesa coating, the method comprises the following steps:
Step 301: scribe the forme used for intaglio printing;
Step 302: configuration nano-silver thread electrically conducting transparent ink;
Step 303: process flexible and transparent base material, increases its hydrophily;
Step 304: use intaglio printing mode to be printed on transparent flexible base material by nano-silver thread electrically conducting transparent ink;
Step 305: solidify the nano-silver thread electrically conducting transparent ink be printed on flexible parent metal.
Wherein in step 301, scribing of forme can adopt the mode of mechanical engraving intaglio plate and electronic engraving intaglio plate to realize.Scribing of this forme needs the requirement combining the transparency to nesa coating and the conductivity to conductive layer to determine the degree of depth and the shape of pit.
Wherein in step 302, the diameter of nano-silver thread can for being less than 120nm and draw ratio is 180-220.Nano-silver thread and organic solvent and binding agent can be configured to electrically conducting transparent ink by the configuration of nano-silver thread in certain proportion.If desired in order to improve the transparency of flexible transparent conducting film, the medium with light diffuse scattering effect can be added in this ink.
Pass through the corona treatment to flexible and transparent base material or plasma treatment in step 303, its hydrophily can be increased, and then strengthen the tack of ink.
After the volatile solvent volatilization in ink, through the baking a little more than 100 degrees Celsius, it can be processed in step 305, make the bonded adhesive solidification added in ink.
In order to ensure flexible transparent conducting film widely using on electronic product, the material of above-mentioned flexible and transparent base material can be polyethylene terephthalate, polymethyl methacrylate or Merlon.Wherein, because the advantage polyethylene terephthalates such as pliability is stronger are comparatively applicable to the diaphragm of touch-screen.
The solution of the present invention adopts intaglio printing to replace hectographic printing of the prior art to carry out manufacturing flexible nesa coating.When printing, electrically conducting transparent ink is filled in the pit of forme, and the excess ink of plate surface is wiped off by blade coating machine, and forme and stock have certain pressure and contact, by the printing ink transfer in pit on stock.Like this, in the process of printing, because ink is in each less pit, can the flowing space greatly reduce, the ink be simultaneously in pit it also avoid the extruding force that can be subject in transfer modes, so greatly reduce the flowable of ink, better can keep line style electric conducting material being uniformly distributed in ink like this, so adopt carry out in this way printing can ensure line style electric conducting material better according to its nature all be distributed in printing ink solvent, the overlap joint that each line style electric conducting material in the conductive layer that printing is obtained is good.
It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
The foregoing is only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.All any amendments done within the spirit and principles in the present invention, equivalent replacement, improvement etc., be all included in protection scope of the present invention.
Claims (9)
1. a manufacture method for flexible transparent conducting film, is characterized in that, comprising:
The mode of intaglio printing is used to be impressed on flexible and transparent base material by disposable for the electrically conducting transparent ink containing line style electric conducting material, solidify the transparency conducting layer that described transparent ink obtains having fixed pattern, it is network-like that the line style electric conducting material in described transparency conducting layer overlaps formation mutually.
2. method according to claim 1, is characterized in that, the material of described flexible and transparent base material is polyethylene terephthalate, polymethyl methacrylate or Merlon.
3. method according to claim 1, is characterized in that, described line style electrically conducting transparent ink is the mixed liquor of line style electric conducting material and volatile solvent.
4. method according to claim 1, is characterized in that, described line style electrically conducting transparent ink is the dispersion liquid of line style electric conducting material and the mixed liquor of binding agent.
5. method according to claim 4, is characterized in that, described binding agent is hydrophily transparent resin.
6. method according to claim 1, is characterized in that, the entirety of the pattern formed for the separate pattern in multiple zones of different being dispersed in described transparent base of described fixed pattern.
7. method according to claim 1, is characterized in that, each pit on the forme that described intaglio printing mode adopts has the different degree of depth.
8. method according to claim 1, is characterized in that, described line style electric conducting material account for 0.2% to 1% of described electrically conductive ink component.
9. the method according to claim 1-8 any one, is characterized in that, containing the medium having light and disperse look ability in described line style electrically conducting transparent ink.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410002888.2A CN104766674A (en) | 2014-01-05 | 2014-01-05 | Method for manufacturing flexible transparent conductive film |
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| CN201410002888.2A CN104766674A (en) | 2014-01-05 | 2014-01-05 | Method for manufacturing flexible transparent conductive film |
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| CN104766674A true CN104766674A (en) | 2015-07-08 |
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| CN201410002888.2A Pending CN104766674A (en) | 2014-01-05 | 2014-01-05 | Method for manufacturing flexible transparent conductive film |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112109569A (en) * | 2020-08-28 | 2020-12-22 | 武昌理工学院 | Length-adjustable charging wire structure of new energy automobile |
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2014
- 2014-01-05 CN CN201410002888.2A patent/CN104766674A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112109569A (en) * | 2020-08-28 | 2020-12-22 | 武昌理工学院 | Length-adjustable charging wire structure of new energy automobile |
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Owner name: BEIJING ZHIMO SCIENCE + TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: LIU HUI Effective date: 20150730 |
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Effective date of registration: 20150730 Address after: 100085, No. 2, information road, 17, Beijing, Haidian District, 17A Applicant after: ZHIMO SCIENCE & TECHNOLOGY CO., LTD. Address before: 102208 Beijing, Hualong, Changping District Beiyuan 12-601 Applicant before: Liu Hui |
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