CN112898830A - UV (ultraviolet) curing conductive ink and film pressure sensor - Google Patents
UV (ultraviolet) curing conductive ink and film pressure sensor Download PDFInfo
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- 229920005989 resin Polymers 0.000 claims abstract description 32
- 239000011347 resin Substances 0.000 claims abstract description 32
- 238000003848 UV Light-Curing Methods 0.000 claims abstract description 23
- 239000002904 solvent Substances 0.000 claims abstract description 23
- 239000000178 monomer Substances 0.000 claims abstract description 20
- 239000011231 conductive filler Substances 0.000 claims abstract description 18
- 239000002270 dispersing agent Substances 0.000 claims abstract description 15
- 239000003999 initiator Substances 0.000 claims abstract description 15
- 239000000758 substrate Substances 0.000 claims description 31
- 229910052751 metal Inorganic materials 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 18
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 14
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- 238000000576 coating method Methods 0.000 claims description 11
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- 239000000835 fiber Substances 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 3
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- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
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- 238000010438 heat treatment Methods 0.000 abstract description 8
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- NQBXSWAWVZHKBZ-UHFFFAOYSA-N 2-butoxyethyl acetate Chemical compound CCCCOCCOC(C)=O NQBXSWAWVZHKBZ-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
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- CYIGRWUIQAVBFG-UHFFFAOYSA-N 1,2-bis(2-ethenoxyethoxy)ethane Chemical compound C=COCCOCCOCCOC=C CYIGRWUIQAVBFG-UHFFFAOYSA-N 0.000 description 1
- SYWGFDMVCJISJX-UHFFFAOYSA-N 2-(oxetan-3-yl)butan-1-ol Chemical compound CCC(CO)C1COC1 SYWGFDMVCJISJX-UHFFFAOYSA-N 0.000 description 1
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- 239000004020 conductor Substances 0.000 description 1
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
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- PHEDXBVPIONUQT-RGYGYFBISA-N phorbol 13-acetate 12-myristate Chemical compound C([C@]1(O)C(=O)C(C)=C[C@H]1[C@@]1(O)[C@H](C)[C@H]2OC(=O)CCCCCCCCCCCCC)C(CO)=C[C@H]1[C@H]1[C@]2(OC(C)=O)C1(C)C PHEDXBVPIONUQT-RGYGYFBISA-N 0.000 description 1
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/52—Electrically conductive inks
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/101—Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/02—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning
- G01L9/04—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning of resistance-strain gauges
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention relates to UV (ultraviolet) curing conductive ink which comprises cationic UV resin, a cationic initiator, a cationic monomer, a UV dispersing agent, conductive filler and a solvent. The UV curing conductive ink can be cured by means of ultraviolet illumination and heating, and a pressure sensitive element made of the UV curing conductive ink is higher in measuring range and better in resistance stability. In addition, the invention also designs a film pressure sensor, and the film pressure sensor comprises a pressure sensitive element which is made of UV curing conductive ink, so that the measuring range is higher, and the resistance stability is better.
Description
Technical Field
The invention relates to a conductive ink, in particular to a UV (ultraviolet) curing conductive ink.
Background
The resistive film pressure sensor is also called a film pressure sensor, a flexible film sensor or an ultrathin flexible printed circuit. Existing membrane pressure sensors generally consist of the following structure: two layers of polyester fiber films (PET) are used as substrates, a conductive material is used on each layer of substrate, a layer of pressure-sensitive ink is added, an insulating layer (pure resin and color paste) is added when the conducting wire structures of the upper substrate and the lower substrate are crossed, and finally the two substrates are pressed together by using an adhesive to form the sensor; the most important pressure-sensitive ink is solvent-based polyester system ink, which is prepared from one or more solvent-based saturated polyester resins, a dispersant, conductive carbon black, a dispersion-aid filler, a latent isocyanate curing agent, a solvent and an auxiliary agent in a proper proportion, and meets the requirements of proper adhesive force, covering and resistance ranges.
The existing ink of the system is thermal curing ink, namely, a solvent is volatilized by heating, a latent isocyanate curing agent is deblocked to react with hydroxyl in saturated polyester resin, so that the curing purpose is achieved, the polyester fiber film has excellent adhesive force after the curing is finished, and meanwhile, a pressure-sensitive conductive layer is formed in a resin base material by distributing conductive carbon black, wherein the thickness of the pressure-sensitive conductive layer is about 20 mu m generally; the saturated polyester resin is generally a linear structure, the structure has excellent flexibility, when the saturated polyester resin is applied to a pressure-sensitive material in a sensor, the resin has poor performance on the structural fixation of carbon black after curing, so that the temperature of the sensor is higher, generally exceeds 60 ℃, the resistance of the conductive ink has obvious offset, the resistance value obtained by the sensor is deviated, in addition, the pressure-sensitive conductive ink layer made of the resin also has slow resistance change under the normal-temperature placing state, the resistance needs longer time to be stabilized, and the production efficiency of the product is lower.
In addition, the existing saturated polyester system inks have several disadvantages:
1. the saturated polyester resin is limited by the molecular structure of the saturated polyester resin, and the formed pressure sensitive layer has low saturation degree for pressure test, namely, the resistance is quickly in a saturated state, the pressure is continuously applied, and the resistance can not have a testable resistance change range;
2. the latent isocyanate curing agent is used for reacting with hydroxyl in the saturated polyester resin to form a cross-linked network structure, so that the high strength test cannot be met, and the resistance saturation degree is low;
3. the latent isocyanate curing agent is used for reacting with hydroxyl in the saturated polyester resin to form a cross-linked reticular structure, but the saturated polyester resin saves a large amount of linear structures, so that the fixing capacity of the conductive carbon black is poor, and the resistance of the conductive layer can change slowly or rapidly under the heating state at normal temperature or certain temperature, so that the resistance of the sensor is unstable;
4. because the conductive carbon black is generally carbon black with a higher oil absorption value, the dispersion difficulty in resin is high, and besides the dispersion by matching with a proper dispersant, the addition of the filler which is beneficial to the dispersion of the carbon black, such as barium sulfate, calcium carbonate, alumina, talcum powder, polytetrafluoroethylene wax powder and the like reduces the surface gloss of the solidified ink, so that the coating has an uneven phenomenon on a fine structure, the resistance stability of the sensor in the use process is poor, and the stability of the initial resistance (generally required to be more than 20M omega) of the sensor is poor;
5. after the latent isocyanate curing agent is added into the conductive ink prepared by a common saturated polyester system, 100% of blocking cannot be achieved due to the blocking technical limitation of the isocyanate curing agent, and the existing free NCO group can react with hydroxyl in polyester resin at normal temperature, so that the conductive ink can slowly react in the storage process, and finally the resistance in use is larger than that of the ink prepared just now, and the resistance stability of the ink is poor;
6. the solvent resistance of a coating film of the ink prepared by the saturated polyester system after curing and film forming is poor, so that the ink is easy to corrode when contacting with other solvent-type insulating layers and glue layers in the application process of the ink, adhesion abnormity may occur, and finally the resistance of the edge part of the coating layer is unstable.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide the UV curing conductive ink which is used for preparing the pressure sensitive element and has higher measuring range and better resistance stability.
The UV-curable conductive ink comprises cationic UV resin, a cationic initiator, a cationic monomer, a UV dispersing agent, a conductive filler and a solvent.
Furthermore, the UV curing conductive ink also comprises an auxiliary agent, wherein the auxiliary agent comprises a leveling agent and an antifoaming agent.
Further, in the UV curable conductive ink of the present invention, the conductive filler is a conductive carbon black filler.
Further, the UV curing conductive ink comprises, by weight, 16-26 parts of cationic UV resin, 8-15 parts of cationic initiator, 8-15 parts of cationic monomer, 7-14 parts of UV dispersant, 7-14 parts of conductive filler, 20-40 parts of solvent and 0.2-0.5 part of assistant.
By the scheme, the invention at least has the following advantages: according to the UV-curable conductive ink, the cation UV resin can be rapidly cured through heat or ultraviolet irradiation, and compared with a mode that the common free radical UV resin can be cured only through ultraviolet light, the curing way is more diversified. Meanwhile, when the amount of the conductive filler is large, ultraviolet rays cannot be irradiated into the inside of the ink made of the general radical UV resin, which limits the amount of the conductive filler added. According to the UV-curable conductive ink disclosed by the invention, the cationic UV resin can be cured through ultraviolet light to realize surface curing, and the deep curing can be further cured through a heating mode. In addition, compared with common solvent type saturated polyester resin, the dense net structure formed by curing the cationic UV resin and the cationic UV monomer under the action of the cationic initiator is higher in rigidity and has certain flexibility, so that the sensor not only can be bent and deformed on a film material, but also has excellent hardness, and a sensor made of the sensor has larger measuring range and resistance stability.
In conclusion, the UV curing conductive ink has the advantages that the pressure sensitive element made of the UV curing conductive ink has higher measuring range and better resistance stability.
A film pressure sensor comprises an upper substrate and a lower substrate, wherein metal conductive films are arranged on the inner side surfaces of the upper substrate and the lower substrate, pressure sensitive elements made of UV curing conductive ink are arranged on the metal conductive films, and the UV curing conductive ink comprises cationic UV resin, a cationic initiator, a cationic monomer, a UV dispersing agent, a conductive filler and a solvent.
Further, in the thin film pressure sensor of the present invention, the metal conductive film is made of silver, and an insulating layer is provided between the metal conductive film on the upper substrate and the metal conductive film on the lower substrate.
Furthermore, in the film pressure sensor of the present invention, the upper substrate and the lower substrate are both polyester fiber films or polyimide films.
According to the film pressure sensor, the pressure sensitive element is made of the UV curing conductive ink, and compared with a common pressure sensitive element, the film pressure sensor is better in resistance stability and higher in measuring range. The UV curing conductive ink is printed on the surface of the metal conductive film in a screen printing mode and is cured in an ultraviolet and heating mode.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a schematic structural view of an upper substrate of a thin film pressure sensor;
in the figure, an upper substrate 1, a metal conductive film 2 and a pressure sensitive element 3.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The first embodiment is as follows:
the UV-curable conductive ink comprises (by weight) 16-26 parts of cationic UV resin, 8-15 parts of cationic initiator, 8-15 parts of cationic monomer, 7-14 parts of UV dispersing agent, 5-10 parts of conductive filler and 20-40 parts of solvent.
Wherein the cationic UV resin is one or more of Japanese xylonite 2021P, 8010, 2081 and 2000, and 2386-87-0 of Shanghai Congress new material, the comprehensive average epoxy equivalent is 100-200, the viscosity is 2-240 mPa.s/25 ℃, and the cationic curable UV resin has a very low viscosity range, so that monomers can be added as little as possible according to the viscosity range suitable for screen printing during use, and the mechanical property and the chemical property of the resin can be further ensured (as the cationic UV resin can realize rapid curing of heat or ultraviolet rays through a cationic reaction mechanism, a compact network structure is further formed).
The cationic initiator is one or more of 6992, 784, 6976 and 1176, after being mixed with the cationic UV resin, the cationic initiator can enable active group epoxy groups in the UV resin to carry out ring-opening reaction through heating or ultraviolet light (200-450 nm) irradiation to form a network structure, and further enable a coating film to be cured into a tough film, and the formed cured coating has excellent hardness, toughness and compactness. (because the cationic initiator is used to react with the cationic UV resin, the formed compact network structure has stronger structural stability, chemical resistance and coating surface smoothness, the cationic initiator and the cationic UV resin can not generate any reaction at normal temperature and in a light-shielding state, and the storage stability of the ink after being uniformly dispersed is good.
The cationic UV monomer is one or more of triethylene glycol divinyl ether and 2- (3-oxetanyl) -1-butanol, the cationic UV monomer is mainly used for adjusting the viscosity of the ink, and is used for improving the compactness of the cured resin to enable the coating film to be tougher, and the cationic UV monomer is matched with a certain high-boiling-point solvent (such as DBE, isophorone, ethylene glycol butyl ether acetate and the like) when necessary, so that the adjustability of the viscosity range of the ink is ensured, and the adverse phenomena that the ink becomes brittle and easy to crack after film forming due to excessive addition of the monomer amount are prevented. (addition of cationic UV monomer can improve the compactness of the coating film.
The UV dispersing agent is one or more of BYK-111, UNIQJET9510, Luborun 36000, Luborun 24000 and Luborun 32000, the dispersing agent mainly has the function of dispersing and conducting electricity, carbon black is stably suspended in UV resin and UV monomers through a certain charge repulsion principle or high molecular steric effect, and the carbon black can be stably and uniformly dispersed in the whole ink fluid, so that the resistance stability of the whole conductive ink is good, and the ink recoatability is good.
The conductive filler is conductive carbon black filler, the preferable conductive carbon black filler is one or more of EC-300J, Kabot VXC-72, Kabot LITX300 and Mitsubishi 3230B, the conductive carbon black has the function of providing certain conductivity to the whole ink system after complete drying and hardening, the resistance can be adjusted to be within the range of the proper resistance of the sensor through the adjustment of the addition amount of the carbon black, and simultaneously, the conductive carbon black and the resin system act together, the conductive path is more smooth when the sensor is pressed, the resistance is reduced according to a certain trend, and the function of stress-resistance change of the sensor is realized.
The solvent is one or more of isophorone, DBE, ethylene glycol monobutyl ether acetate and PMA, the main function of the solvent is to adjust the viscosity of the ink by matching with a monomer so as to adapt to a screen printing scheme, the solvent can be baked and volatilized at a certain temperature (120-125 ℃) after the printing of the ink is finished, and finally the solvent can be volatilized completely.
The method for producing the UV curable conductive ink of the present embodiment includes the steps of:
s1, adding the cationic UV resin, the cationic photoinitiator, the cationic UV monomer and the solvent into a stirring tank according to a certain proportion, and dispersing for 5min at the speed of 400-600 rpm;
s2, adding a certain proportion of dispersant in the step S1, and dispersing for 10 minutes at the speed of 600-800 rpm;
s3, after the step S2 is finished, adding a certain proportion of conductive filler, and dispersing for 20 minutes at the speed of 800rpm, wherein the conductive filler is preferably conductive carbon black filler in the implementation;
s4, adding a certain amount of auxiliary agents (flatting agents and antifoaming agents) after the step S3 is finished, dispersing for 10 minutes at the speed of 800rpm, and grinding to reach the required fineness (the fineness is less than 3 μm);
s5, taking out the ink after the step S4 is finished, adding a solvent to adjust the viscosity, dispersing for 20min at the speed of 800rpm, and filtering to obtain a finished product.
The curing mode adopted by the conductive ink prepared by the method is a cationic UV curing mode, the curing mode can be UV curing and can also be a heating curing reaction, the UV curing can be regarded as surface curing, the thermal curing can be regarded as deep curing, the printed ink layer is ensured to be completely cured, and the curing degree of the ink layer is ensured;
the cationic curing mode solves the difficult problem of difficult thorough curing of the UV black opaque ink, the common UV ink is difficult to realize black opaque, in order to ensure a fixed resistance value, the addition amount of the conductive carbon black has a large addition amount in the ink, the overall blackness of the ink is high, when the ink is printed to be more than 15 microns, an ink layer is opaque, UV illumination is difficult to pass, and the phenomenon that the curing of the black ink layer is incomplete or the orange peel on the surface after curing is caused is avoided;
the UV curing mode does not contain a hydroxyl group and NCO reaction part, so that the slow curing of the ink in the storage process is avoided on the premise that the ink does not receive illumination, and the resistance stability of the ink is ensured.
After the printing ink layer is completely cured by the UV curing mode, the coating forms a very compact net structure, the net structure after UV curing is relatively very stable, the fixation of conductive carbon black particles is very favorable, and the characteristic that the resistance of the conductive coating is stable at normal temperature and certain temperature is further ensured.
Preferably, the UV curable conductive ink of the present invention further comprises an auxiliary agent, and the auxiliary agent comprises a leveling agent and an antifoaming agent.
The leveling agent is one or more of BYK-333, BYK-410, BYK-UV3510, a defoaming agent is Digao 1488, Huaxia HX-2080, BYK-055 and BYK-057, and the leveling agent is used for improving the leveling property of a coating of the printing ink after the printing ink is screen-printed to a PET/PI material, so that the surface of the ink layer is smooth and flat without concave-convex feeling; the defoaming agent is used for eliminating bubbles generated in the printing ink forming process by the screen printing mode, and ensuring the compactness and the surface flatness of the formed printing ink layer.
Preferably, in the UV curable conductive ink of the present invention, the conductive filler is a conductive carbon black filler.
Preferably, the UV curing conductive ink comprises, by weight, 16-26 parts of cationic UV resin, 8-15 parts of cationic initiator, 8-15 parts of cationic monomer, 7-14 parts of UV dispersant, 7-14 parts of conductive filler, 20-40 parts of solvent and 0.2-0.5 part of assistant.
Example two:
referring to fig. 1, a film pressure sensor includes an upper substrate 1 and a lower substrate (not shown in the figure), wherein metal conductive films 2 are respectively disposed on inner side surfaces of the upper substrate and the lower substrate, a pressure sensitive element 3 made of UV curable conductive ink is disposed on the metal conductive films, and the UV curable conductive ink includes cationic UV resin, cationic initiator, cationic monomer, UV dispersant, conductive filler and solvent.
According to the film pressure sensor, the pressure sensitive element is made of the UV curing conductive ink, and compared with a common pressure sensitive element, the film pressure sensor is better in resistance stability and higher in measuring range. The UV curing conductive ink is printed on the surface of the metal conductive film in a screen printing mode and is cured in an ultraviolet and heating mode.
Preferably, in the thin film pressure sensor of the present invention, the metal conductive film is made of silver, and an insulating layer is provided between the metal conductive film on the upper substrate and the metal conductive film on the lower substrate.
Preferably, in the thin film pressure sensor of the present invention, the upper substrate and the lower substrate are both polyester fiber films or polyimide films.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description.
In addition, the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention. Also, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A UV-curable conductive ink, characterized by: comprises cationic UV resin, cationic initiator, cationic monomer, UV dispersant, conductive filler and solvent.
2. The UV-curable conductive ink according to claim 1, wherein: the coating also comprises an auxiliary agent, wherein the auxiliary agent comprises a leveling agent and an antifoaming agent.
3. The UV-curable conductive ink according to claim 2, wherein: the conductive filler is conductive carbon black filler.
4. The UV-curable conductive ink according to claim 3, wherein: the UV-curable resin composition comprises, by weight, 16-26 parts of cationic UV resin, 8-15 parts of cationic initiator, 8-15 parts of cationic monomer, 7-14 parts of UV dispersant, 7-14 parts of conductive filler, 20-40 parts of solvent and 0.2-0.5 part of auxiliary agent.
5. The utility model provides a film pressure sensor, includes upper substrate and lower substrate, and the medial surface of upper substrate and lower substrate all is equipped with metal conducting film, its characterized in that: the metal conductive film is provided with a pressure sensitive element made of UV curing conductive ink, and the UV curing conductive ink comprises cationic UV resin, a cationic initiator, a cationic monomer, a UV dispersing agent, a conductive filler and a solvent.
6. The membrane pressure sensor of claim 5, wherein: the metal conductive film is made of silver, and an insulating layer is arranged between the metal conductive film on the upper substrate and the metal conductive film on the lower substrate.
7. The membrane pressure sensor of claim 5, wherein: the upper substrate and the lower substrate are both polyester fiber films or polyimide films.
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Application publication date: 20210604 |