CN111862780A - Anti-counterfeit label with lens - Google Patents

Anti-counterfeit label with lens Download PDF

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Publication number
CN111862780A
CN111862780A CN202010700724.2A CN202010700724A CN111862780A CN 111862780 A CN111862780 A CN 111862780A CN 202010700724 A CN202010700724 A CN 202010700724A CN 111862780 A CN111862780 A CN 111862780A
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China
Prior art keywords
low
label
lens
heating ink
voltage
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Pending
Application number
CN202010700724.2A
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Chinese (zh)
Inventor
叶双莉
钱俊
廖宇
魏旭冉
王鑫
黄月
张海斋
谷思怡
孙基素
马晓花
李庆芝
赵美君
宋蓉
程凯兴
刘汉东
陈袁
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Wuhan Shidimu Cultural Media Co ltd
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Wuhan Shidimu Cultural Media Co ltd
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Priority to CN202010700724.2A priority Critical patent/CN111862780A/en
Publication of CN111862780A publication Critical patent/CN111862780A/en
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F3/0291—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time
    • 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
    • C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
    • C09D11/037—Printing inks characterised by features other than the chemical nature of the binder characterised by the pigment
    • 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
    • C09D11/08—Printing inks based on natural resins
    • 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
    • C09D11/106—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C09D11/107—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from unsaturated acids or derivatives thereof
    • 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
    • C09D11/14—Printing inks based on carbohydrates
    • 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

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)

Abstract

The invention belongs to the technical field of anti-counterfeit labels, and particularly relates to an anti-counterfeit label with a lens, which at least comprises a substrate layer, wherein a low-voltage heating ink layer, a shielding layer, a label printing layer and a lens are sequentially arranged on the substrate layer, the lens is a lens with variable curvature, and the low-voltage heating ink layer is connected with a power supply positioned outside the anti-counterfeit label. The lens with the variable curvature is made of plastic resin, the curvature is changed after heating, so that light cannot be focused, the authenticity of a label pattern observed by human eyes can be judged after the label pattern becomes fuzzy, the use is simple, the observation is easy, and the rapid anti-counterfeiting is facilitated; the USB interface can be adopted to connect with a power supply, so that the USB interface is convenient to use and is not limited by places.

Description

Anti-counterfeit label with lens
Technical Field
The invention belongs to the technical field of anti-counterfeit labels, and particularly relates to an anti-counterfeit label with a lens.
Background
In recent years, anti-counterfeiting and display technologies are developed rapidly, anti-counterfeiting types are more and more, many anti-counterfeiting technologies have been developed for a long time, basic principles and implementation methods are basically known by the public, the anti-counterfeiting technologies are challenged, and the anti-counterfeiting labels are static, have single use style, cannot meet the requirements of dynamic change display, and urgently need to develop new anti-counterfeiting technologies. A lens is a well-known optical element, belonging to the passive optical elements, used in optical systems to converge and diverge light radiation. The invention provides an anti-counterfeit label based on a technology of a lens with variable curvature and conductive ink.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides an anti-counterfeiting label with a lens.
The technical scheme adopted for achieving the purpose of the invention is as follows: the utility model provides a take antifalsification label of lens, includes the stratum basale at least, be equipped with low-voltage heating ink layer, shielding layer, label printing layer and lens on the stratum basale in proper order, lens are the changeable lens of camber, the low-voltage heating ink layer with be located with the antifalsification label power connection in the outside.
And the power supply is a USB interface or a switch and a battery which can be connected with electricity, the low-voltage heating ink layer is connected with the power supply through a conducting wire made of conductive ink or conductive metal, and the USB interface or the switch which can be connected with electricity is positioned on the outer side of the anti-counterfeit label.
And a first silver paste layer is arranged between the substrate layer and the upper part of the low-voltage heating ink layer, and the lens with variable curvature is made of one or the combination of polymethyl methacrylate and polycarbonate in any proportion.
Further, the label printing layer is printed with a label.
The color of the shielding layer is different from the color of the label printed on the label printing layer.
The low-voltage heating ink layer comprises the following components in percentage by mass: 5-10% of water-based acrylic resin, 5-10% of rosin resin, 5-15% of graphite, 3-10% of carbon black, 0-50% of carbon nanotube dispersion liquid, 0.5-1.5% of pH regulator, 1-5% of dispersing agent, 0-1% of xanthan gum, 0.5-1% of defoaming agent and 10-50% of deionized water.
The low-voltage heating ink layer is formed by coating low-voltage heating ink on the substrate layer through a screen printing or coating method.
The pH regulator is one or more of formamide, ethanolamine or ammonia water which are mixed in any proportion.
The dispersant is one of Dispenser W-518 type aqueous wetting dispersant, Dispenser W-920 type aqueous wetting dispersant, NUOSPERSE FX 600 type aqueous wetting dispersant or NUOSPERSE FX 365 type aqueous wetting dispersant or a plurality of the dispersant mixed in any proportion.
The defoaming agent is one or a plurality of types of DefomW-0506 type waterborne defoaming agents, TEGO Foamex 805 type waterborne defoaming agents or SF-809B type standard American silicon fluorine defoaming agents which are mixed in any proportion.
The technical scheme of the invention has the beneficial effects that:
(1) the power supply has two options, namely a USB interface capable of being connected with electricity, and a switch and a battery. When the power supply adopts the combination of the switch and the battery, the switch is closed to provide the power supply for the anti-counterfeit label; when the USB interface is adopted, the charging power supply or the mobile power supply can be directly connected with the USB interface arranged outside the anti-counterfeiting label, so that the anti-counterfeiting label is convenient to use and is not limited by places.
(2) The lens with changeable curvature is made of plastic resin, the temperature of the low-voltage heating ink layer reaches the melting point of the lens material after being electrified, so that the lens structure is deformed, the curvature of the lens is changed, and the authenticity can be judged by blurring the label pattern observed by human eyes. The anti-counterfeiting liquid is simple to use, easy to observe and beneficial to rapid anti-counterfeiting.
(3) The shielding layer color is different from the label color printed on the label printing layer, so that the color of the low-voltage heating ink layer can be prevented, and the influence of the color of the shielding layer on the visual observation of the label can be avoided.
(4) The low-voltage heating ink provided by the invention has the following advantages: 1. biomass materials such as xanthan gum and rosin resin are used as raw materials, so that the effects of energy conservation and environmental protection are achieved; 2. under the combined action of the xanthan gum and the rosin resin, the overall proportion of the acrylic resin in the ink is reduced, so that the proportion of conductive fillers such as carbon black, graphite and carbon nano tubes in a carbon film formed after the prepared low-voltage heating ink is dried is increased, and the conductivity is excellent; 3. the low-voltage heating ink has higher viscosity and better thixotropy, the viscosity of the ink is instantly reduced under the action of shearing force in the printing process to form a thicker carbon film, the viscosity is rapidly improved after the printing is finished, so that the ink is not diffused on a printing stock, the printing adaptability of the ink is improved, and the low-voltage heating ink is suitable for screen printing; 4. the low-voltage heating ink can obtain a better heating effect under a lower working voltage. High heating efficiency and high heating rate.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of a security label with a lens according to the present invention;
FIG. 2 is a schematic diagram of the anti-counterfeit label with lens provided by the invention before power connection;
FIG. 3 is a schematic diagram of the anti-counterfeit label with lens according to the present invention after power is applied;
FIG. 4(a) is a graph showing the operation of 3cm by 3cm low voltage heating ink packs prepared in example 1 of the present invention at different voltages;
FIG. 4(b) is the operation of the low-voltage heating ink block in example 1 under the condition of continuously changing voltage;
FIG. 5 is a graph showing the temperature of the low-voltage heat-generating ink stick versus time in example 1;
FIG. 6 is a graph showing the heating temperature of the low-voltage heating ink block as a function of power density in this example 1;
FIG. 7 is a graph showing the volt-ampere relationship of the low voltage thermal ink stick of this example 1;
fig. 8 is a graph of the input voltage versus saturation temperature for the low voltage heating ink block of this embodiment 1.
In the figure: 1. the lens, 2, label printing layer, 3, shielding layer, 4, low voltage heating ink layer, 5, basal layer.
Detailed Description
The invention is further explained by the figures and the examples.
Fig. 1 is an embodiment of the anti-counterfeit label with a lens, provided by the invention, and the anti-counterfeit label with the lens includes a substrate layer 5, wherein a low-voltage heating ink layer 4, a shielding layer 3, a label printing layer 2 and a lens 1 are sequentially arranged on the substrate layer, the lens is a lens with a variable curvature, and the low-voltage heating ink layer is connected with a power supply located outside the anti-counterfeit label. The power supply is a USB interface or a switch and a battery which can be connected with electricity, the low-voltage heating ink layer is connected with the power supply through a conducting wire made of conducting ink or conducting metal, the conducting wire is made of conducting ink or conducting metal, and the conducting ink can adopt the low-voltage heating ink provided by the scheme and can also be other types of conducting ink. The concrete position that sets up of wire is according to the corresponding setting of size on the low-voltage heating printing ink layer, can set up from top to bottom on the low-voltage heating printing ink layer, also can set up at low-voltage heating printing ink layer both ends. The circuit is simple and easy to realize, and the circuit is formed by connecting a switch, a battery, a lead and a low-voltage heating ink layer into a loop, or two poles of a USB interface are connected with the low-voltage heating ink layer through the lead.
The low-voltage heating ink layer is formed by coating low-voltage heating ink on a substrate layer by a screen printing or coating method, and the substrate layer is made of any material capable of printing ink, such as paper, cloth, cotton and plastic.
The label printing layer is printed with a label, the color of the shielding layer is different from that of the label printed layer, the shielding layer can be made of paper cloth, cotton plastics and the like, and the influence of the color of the shielding layer on the visual observation of the label can be avoided.
Fig. 2 is a schematic structural diagram of the anti-counterfeit label with the lens before power connection, and the product is manufactured into a label with a printed layer printed clearly when the curvature of the lens is not changed. Fig. 3 is a schematic structural diagram of the anti-counterfeit label with the lens after being connected with electricity, when a power circuit is connected, the low-voltage heating ink layer is electrified, the temperature reaches the melting point of the lens material, so that the lens structure is deformed, the curvature of the lens is changed, and the pattern of the printing layer becomes fuzzy due to the change of the curvature, so that the aim of quickly identifying the authenticity of human eyes is fulfilled.
The material used to make the lens has a high transparency and a melting point within the range that can be achieved with low voltage heat-generating inks, for example, a 3cm by 3cm low voltage heat-generating ink block prepared in example 1 can achieve 175 ℃ at 3V, and the melting point of the material used is within 175 ℃. The invention adopts a lens with variable curvature, which is made of one of polymethyl methacrylate and polycarbonate or the combination of the polymethyl methacrylate and the polycarbonate in any proportion.
(1) PMMA: polymethyl methacrylate, commonly known as organic glass
The method is characterized in that: highest transparency of all plastics
Transmittance: 91 to 94 percent
Refractive index: 1.49
Melting point: 130 ℃ and 140 DEG C
Coefficient of thermal expansion: 6 x 10-5/° c.
(2) PC: polycarbonate resin
The method is characterized in that: compared with PMMA, the material has higher refractive index, better heat resistance, impact resistance, flame retardance and processability than PMMA, but is relatively expensive.
Transmittance: 85 to 89 percent
Refractive index: 1.586
Heat distortion temperature: 130 deg.C
Embrittlement temperature: -100 deg.C
The thermal expansion coefficient of PMMA is (5-9) × 10-5/° C, which is 10 times that of glass.
The technical scheme of the invention has the beneficial effects that:
(1) the power supply has two options, namely a USB interface capable of being connected with electricity, and a switch and a battery. When the power supply adopts the combination of the switch and the battery, the switch is closed to provide the power supply for the anti-counterfeit label; when the USB interface is adopted, the charging power supply or the mobile power supply can be directly connected with the USB interface arranged outside the anti-counterfeiting label, so that the anti-counterfeiting label is convenient to use and is not limited by places.
(2) The lens with changeable curvature is made of plastic resin, the temperature of the low-voltage heating ink layer reaches the melting point of the lens material after being electrified, so that the lens structure is deformed, the curvature of the lens is changed, and the authenticity can be judged by blurring the label pattern observed by human eyes. The anti-counterfeiting liquid is simple to use, easy to observe and beneficial to rapid anti-counterfeiting.
(3) The shielding layer color is different from the label color printed on the label printing layer, so that the color of the low-voltage heating ink layer can be prevented, and the influence of the color of the shielding layer on the visual observation of the label can be avoided.
The low-voltage heating ink in the anti-counterfeiting label with the lens comprises the following components in percentage by mass: 5-10% of water-based acrylic resin, 5-10% of rosin resin, 5-15% of graphite, 3-10% of carbon black, 0-50% of carbon nanotube dispersion liquid, 0.5-1.5% of pH regulator, 1-5% of dispersing agent, 0-1% of xanthan gum, 0.5-1% of defoaming agent and 10-50% of deionized water. The pH regulator is one or more of formamide, ethanolamine or ammonia water which are mixed in any proportion. The dispersant is one of Dispenser W-518 type aqueous wetting dispersant, Dispenser W-920 type aqueous wetting dispersant, NUOSPERSE FX 600 type aqueous wetting dispersant or NUOSPERSE FX 365 type aqueous wetting dispersant or a plurality of the dispersant mixed in any proportion. The defoaming agent is one or a mixture of several of a DefomW-0506 type waterborne defoaming agent, a TEGOFoamex 805 type waterborne defoaming agent or a SF-809B type standard silicon fluoride defoaming agent in any proportion.
The preparation method of the low-voltage heating ink specifically comprises the following steps:
(1) weighing each component of the low-voltage heating ink according to the mass parts, placing the water-based acrylic resin, the rosin resin, the pH regulator and the deionized water in a stirring kettle, stirring for 5-10 min, after uniformly mixing, sequentially adding the carbon black, the graphite, the carbon nanotube dispersion liquid and the xanthan gum, uniformly stirring, finally adding the dispersing agent and the defoaming agent, and uniformly stirring to form the primary heating ink;
(2) mixing the primary heating ink and the ball-milled beads according to the mass ratio of 3:1, placing the mixture in an electric stirrer, stirring the mixture for 1-3 hours, taking out the mixture, filtering the mixture, and finally placing the primary heating ink in a sand mill, and grinding the mixture until the particle size is below 5 microns to obtain the low-voltage heating ink.
In the preparation process of the low-voltage heating ink, xanthan gum, conductive fillers such as carbon black, graphite and carbon nano tubes and deionized water can form a stable three-dimensional network structure, so that graphene, carbon black and graphite generated in the mechanical grinding process have better dispersion stability; the xanthan gum serving as the biomass hydrogel can form a reversible hydrogel with solvents such as deionized water and the like, free water molecules in the ink are reduced, the viscosity of the ink is improved, the reversible hydrogel enables the viscosity of the prepared low-voltage heating ink to be larger than 10000mPa & s in a standing state, the viscosity of the low-voltage heating ink is reduced to 4000-5000 mPa & s under stirring at a rotating speed of 60r/min, and the viscosity of the low-voltage heating ink is recovered to be more than 10000mPa & s after stirring is stopped.
Example 1:
weighing 7% of water-based acrylic resin, 7% of rosin resin, 6% of graphite, 10% of carbon black, 35% of carbon nanotube dispersion liquid, 0.5% of formamide, 0.5% of ethanolamine, 5% of Disponer W-518 type water-based wetting dispersant, 0.3% of xanthan gum, 0.5% of TEGO Foamex 805 type water-based defoaming agent and 28.2% of deionized water according to parts by mass.
Placing 7% of water-based acrylic resin, 7% of rosin resin, 0.5% of formamide, 0.5% of ethanolamine and 28.2% of deionized water in a stirring kettle, stirring for 5-10 min, after uniformly mixing, sequentially adding 10% of carbon black, 6% of graphite, 35% of carbon nanotube dispersion liquid and 0.3% of xanthan gum, uniformly stirring, finally adding 5% of Disponer W-518 type water-based wetting dispersant and 0.5% of TEGO Foamex 805 type water-based defoaming agent, and uniformly stirring to form primary heating ink; mixing the primary heating ink and the ball-milled beads according to the mass ratio of 3:1, placing the mixture in an electric stirrer to be mixed and dispersed for 2 hours, taking out the mixture to be filtered, and finally placing the primary heating ink in a sand mill to be ground until the particle size is below 5 mu m to obtain the low-voltage heating ink.
The low-voltage heating ink obtained in the embodiment has the viscosity of 9000-11000 mPa & s under stirring at the rotating speed of 12r/min, the viscosity of 4000-5000 mPa & s under stirring at the rotating speed of 60r/min, the thickness of the dried ink layer is 15-18 mu m, the low-voltage heating ink can be used for screen printing of a 200-mesh silk screen printing plate once, and the sheet resistance value of the low-voltage heating ink is 9.6 omega/25 mu m. The saturation temperature of the low-voltage heating ink heating module with the size of 2cm multiplied by 2.5cm under the working voltage of 3V can reach 80 ℃.
The measurement conditions were as follows: 1. square resistance: measurement using a four-probe sheet resistance tester
2. Viscosity: measurement using a rotational viscometer
3. Saturation temperature: measured using an infrared camera.
FIG. 4(a) is a graph showing the operation of the 3cm by 3cm low voltage heating ink packs prepared in example 1 of the present invention at different voltages. And respectively switching on heating data of direct current voltages of 1.0v, 1.5v, 2.0v, 2.5v and 3.0v, and testing the temperature response rate of the low-voltage heating ink block and the saturation temperature of the low-voltage heating ink block at each working voltage. The temperature influence speed is fast, the saturation temperature can be reached by switching on the power supply for about 10s, the required voltage is extremely low, the heating efficiency is high, and the heating rate is fast. When 1.0v of voltage is applied to the low-voltage heating ink block, the passing working current is 0.28A, and the saturation temperature which can be reached is about 47 ℃; when 1.5v voltage is switched on, the passing working current is 0.428A, and the saturation temperature is 70 ℃; when 2.0v of voltage is applied, the working current is 0.583A, and the saturation temperature is 100 ℃; when 2.5v of voltage is applied, the working current is 0.749A, and the saturation temperature is 130 ℃; when 3.0v voltage was applied, the operating current was 0.915A, and the saturation temperature reached by the low voltage heat-generating ink block was about 175 ℃. The prepared low-voltage heating ink block has very high electrothermal radiation conversion efficiency, extremely low required working voltage and safer use of the low-voltage heating ink. Fig. 4(b) shows the operation of the low-voltage heating ink block under the condition of continuously changing voltage, the voltage applied to the low-voltage heating ink block is continuously increased from 1.0v to 3.0v at intervals of 0.5v, and it can be seen that the response rate and the heating stability are very stable, and the saturation temperature reached at the same voltage is consistent with that of the graph in fig. 4 (a). According to an electrothermal radiation conversion efficiency formula: β ═ S α (T) r 4-T0 4) P, where β is the electrothermal radiation conversion efficiency of the electrothermal film, S is the heating area of the electrothermal film, and α is the Spander-Boltzmann constant (5.67 × 10)-8In the unit of W/m2K4)，TrIs the saturation temperature at a certain working voltageDegree, T0P is the ambient temperature and electric power. According to the formula, the electrothermal radiation conversion efficiency beta of the low-voltage heating ink block under the working voltage of 3v is 74.75 percent, which is about 10 percent higher than that of the traditional electrothermal material.
The carbon material is stable in chemical property, can stably exist in the air, is not suitable for reacting with oxygen, the aqueous acrylic resin used by the low-voltage heating ink block is stable and does not decompose in the air below 250 ℃, and the conductive carbon particles are stable and does not decompose in the air below 400 ℃, so that the prepared low-voltage heating ink block can continuously and stably work at the running temperature below 200 ℃. To further verify that the low voltage heat-generating ink block can continuously and stably operate at high temperature (175 ℃), the low voltage heat-generating ink block is modulated to have higher working voltage (3.0v) and is kept for more than 4h in the operation state at 175 ℃. As shown in fig. 5, the temperature and time variation relationship shows that the saturation temperature remains unchanged in the high temperature state, which indicates that the electrothermal infrared radiation efficiency of the low voltage heat-generating ink block, and the composition and performance of the ink are not changed, which is enough to prove that the stability of the low voltage heat-generating ink in the air and in the high temperature state is very outstanding.
Fig. 6 shows a functional relationship between the heating temperature and the power density of the low-voltage heating ink block prepared in this embodiment, and a fitted curve of the temperature and the power density is approximately linear (T ═ 249 × P +37, T is the temperature, and P is the energy density), and as can be seen from the graph, the slope is steep (about 249.53 ℃ c, cm2W-1), which indicates that the saturation temperature that can be reached per unit area under the same power density condition is higher, i.e., the electrothermal infrared radiation efficiency is higher, which indicates that the electrothermal infrared radiation efficiency of the low-voltage heating ink block prepared based on this embodiment is higher, and the energy consumption is lower.
Fig. 7 is a graph of the volt-ampere (V-a) relationship of the low voltage heat-generating ink stick prepared in this example, and it can be seen from the fitted curve that the voltage V applied to the low voltage heat-generating ink stick is almost proportional to the passing current a, which shows that the resistance of the low voltage heat-generating ink stick does not change with the increase of temperature (the saturation temperature is 47 ℃ at 1.0V to 175 ℃ at 3.0V), i.e., the resistance does not change with the change of temperature.
Fig. 8 is a graph of the relationship between the input voltage and the saturation temperature of the low-voltage heat-generating ink stick prepared in this example, and it can be seen from the fitted curve in the graph that the saturation temperature reached when the low-voltage heat-generating ink stick is powered on is exponential to the voltage applied at both ends: t ═ A 1exp(-V/t1)-y0Where T is the saturation temperature of the electrothermal film, V is the voltage at which it is switched on, A1＝39.98±13.40，t1＝-1.91±0.31，y0-14.84 ± 16.71. The exponential relationship between temperature and voltage shows that the conversion efficiency of the low-voltage heat-generating ink block prepared in the embodiment through infrared heat radiation is high.
Example 2:
weighing 7% of water-based acrylic resin, 7% of rosin resin, 5% of graphite, 10% of carbon black, 35% of carbon nanotube dispersion liquid, 1% of ethanolamine, 5% of Disponer W-920 type water-based wetting dispersant, 0.3% of xanthan gum, 0.5% of DefomW-0506 type water-based defoaming agent and 29.2% of deionized water according to parts by mass.
Placing 7% of water-based acrylic resin, 7% of rosin resin, 1% of ethanolamine and 29.2% of deionized water in a stirring kettle, stirring for 5-10 min, after uniformly mixing, sequentially adding 10% of carbon black, 5% of graphite, 35% of carbon nanotube dispersion liquid and 0.3% of xanthan gum, uniformly stirring, finally adding 5% of Disponer W-920 type water-based wetting dispersant and 0.5% of DefomW-0506 type water-based defoaming agent, and uniformly stirring to form primary heating ink; mixing the primary heating ink and the ball-milled beads according to the mass ratio of 3:1, placing the mixture in an electric stirrer to be mixed and dispersed for 2.5h, taking out and filtering the mixture, and finally placing the primary heating ink in a sand mill to be ground until the particle size is below 5 mu m to obtain the low-voltage heating ink.
The low-voltage heating ink obtained in the embodiment has the viscosity of 9000-11000 mPa & s under stirring at the rotating speed of 12r/min, the viscosity of 4000-5000 mPa & s under stirring at the rotating speed of 60r/min, the thickness of the dried ink layer is 15-18 mu m, the low-voltage heating ink can be used for screen printing of a 200-mesh silk screen printing plate once, and the sheet resistance value of the low-voltage heating ink is 10.6 omega/25 mu m. The saturation temperature of the low-voltage heating ink heating module with the size of 2cm multiplied by 2.5cm under the working voltage of 5V can reach 72 ℃.
Example 3:
respectively weighing 10% of waterborne acrylic resin, 5% of rosin resin, 12% of graphite, 6% of carbon black, 40% of carbon nanotube dispersion liquid, 1.5% of ammonia water, 5% of NUOSPERSE FX 365 type waterborne wetting dispersant, 0.4% of xanthan gum, 1% of SF-809B type standard American silicon fluorine defoaming agent and 19.1% of deionized water according to the mass parts.
Placing 10% of water-based acrylic resin, 5% of rosin resin, 1.5% of ethanolamine and 19.1% of deionized water in a stirring kettle, stirring for 5-10 min, after uniformly mixing, sequentially adding 6% of carbon black, 12% of graphite, 40% of carbon nanotube dispersion and 0.4% of xanthan gum, uniformly stirring, finally adding 5% of NUEROSPSE FX 365 type water-based wetting dispersant and 1% of SF-809B type standard silicon fluorine defoaming agent, and uniformly stirring to form primary heating ink; mixing the primary heating ink and the ball-milled beads according to the mass ratio of 3:1, placing the mixture in an electric stirrer to be mixed and dispersed for 2.5h, taking out and filtering the mixture, and finally placing the primary heating ink in a sand mill to be ground until the particle size is below 5 mu m to obtain the low-voltage heating ink.
The low-voltage heating ink obtained in the embodiment has the viscosity of 15000-20000 mPa & s under stirring at the rotating speed of 12r/min, the thickness of the dried ink layer is 20-22 mu m, the low-voltage heating ink can be used for screen printing of a 200-mesh silk screen plate once, and the sheet resistance value of the low-voltage heating ink is 8.9 omega/25 mu m. The saturation temperature of the low-voltage heating ink heating module with the size of 2cm multiplied by 2.5cm under the working voltage of 5V can reach 76 ℃.
Example 4:
weighing 5% of water-based acrylic resin, 10% of rosin resin, 9% of graphite, 6% of carbon black, 30% of carbon nanotube dispersion liquid, 0.5% of ethanolamine, 4% of a mixture of Disponer W-920 type water-based wetting dispersant and NUOSPERSE FX 600 type water-based wetting dispersant, 0.5% of xanthan gum, 0.5% of TEGO Foamex 805 type water-based defoaming agent and 34.5% of deionized water according to parts by mass.
Placing 5% of water-based acrylic resin, 10% of rosin resin, 0.5% of ethanolamine and 34.5% of deionized water in a stirring kettle, stirring for 5-10 min, after uniformly mixing, sequentially adding 6% of carbon black, 9% of graphite, 30% of carbon nanotube dispersion and 0.5% of xanthan gum, uniformly stirring, finally adding a mixed solution of 4% of Disponer W-920 type water-based wetting dispersant and NUOSPERSE FX 600 type water-based wetting dispersant and 0.5% of TEGO Foamex 805 type water-based defoaming agent, and uniformly stirring to form primary heating ink; mixing the primary heating ink and the ball-milled beads according to the mass ratio of 3:1, placing the mixture in an electric stirrer to be mixed and dispersed for 3 hours, taking out the mixture to be filtered, and finally placing the primary heating ink in a sand mill to be ground until the particle size is below 5 mu m to obtain the low-voltage heating ink.
The low-voltage heating ink obtained in the example has viscosity of 12000mPa & s under stirring at a rotating speed of 12r/min, the thickness of the dried ink layer is 19 μm, the low-voltage heating ink can be used for screen printing of a 200-mesh screen printing plate once, and the sheet resistance value of the low-voltage heating ink is 9.6 omega/25 μm. The saturation temperature of the low-voltage heating ink heating module with the size of 2cm multiplied by 2.5cm under the working voltage of 5V can reach 70 ℃.
Example 5:
respectively weighing 10% of water-based acrylic resin, 10% of rosin resin, 15% of graphite, 10% of carbon black, 1.5% of ethanolamine, 5% of NUOSPERSE FX 365 type water-based wetting dispersant, 1% of DefomW-0506 type water-based defoaming agent and 47.5% of deionized water according to parts by weight.
Placing 10% of water-based acrylic resin, 10% of rosin resin, 1.5% of ethanolamine and 47.5% of deionized water in a stirring kettle, stirring for 5-10 min, after uniformly mixing, sequentially adding 10% of carbon black and 15% of graphite, uniformly stirring, finally adding 5% of NUOSPERSE FX 365 type water-based wetting dispersant and 1% of DefomW-0506 type water-based defoaming agent, and uniformly stirring to form primary heating ink; mixing the primary heating ink and the ball-milled beads according to the mass ratio of 3:1, placing the mixture in an electric stirrer to be mixed and dispersed for 3 hours, taking out the mixture to be filtered, and finally placing the primary heating ink in a sand mill to be ground until the particle size is below 5 mu m to obtain the low-voltage heating ink.
The low-voltage heating ink obtained in the example has a viscosity of 18000mPa · s under stirring at a rotation speed of 12r/min, has a thickness of 23 μm after drying, can be used for screen printing of a 200-mesh screen printing plate once, and has a sheet resistance value of 12.8 Ω/25 μm. The saturation temperature of the low-voltage heating ink heating module with the size of 2cm multiplied by 2.5cm under the working voltage of 5V can reach 68 ℃.
Example 6:
weighing 7.5% of water-based acrylic resin, 7.5% of rosin resin, 5% of graphite, 8% of carbon black, 50% of carbon nanotube dispersion liquid, 0.8% of ammonia water, 1% of Disponer W-920 type water-based wetting dispersant, 1% of xanthan gum, 0.3% of mixed liquid of TEGO Foamex 805 type water-based defoamer and SF-809B type standard silicon fluorine defoamer and 18.9% of deionized water according to parts by weight.
Placing 7.5% of water-based acrylic resin, 7.5% of rosin resin, 0.8% of ammonia water and 18.9% of deionized water in a stirring kettle, stirring for 5-10 min, after uniformly mixing, sequentially adding 8% of carbon black and 5% of graphite, uniformly stirring, finally adding a mixed solution of 1% of Disponer W-920 type water-based wetting dispersant, 0.3% of TEGO Foamex 805 type water-based defoaming agent and SF-809B type standard silicon fluorine defoaming agent, and uniformly stirring to form primary heating ink; mixing the primary heating ink and the ball-milled beads according to the mass ratio of 3:1, placing the mixture in an electric stirrer to be mixed and dispersed for 1h, taking out the mixture to be filtered, and finally placing the primary heating ink in a sand mill to be ground until the particle size is below 5 mu m to obtain the low-voltage heating ink.
The low-voltage heating ink obtained in the embodiment has the viscosity of 11000mPa & s under the stirring at the rotating speed of 12r/min, the thickness of the dried ink layer is 18 mu m, the low-voltage heating ink can be used for screen printing of a 200-mesh screen printing plate once, and the sheet resistance value of the low-voltage heating ink is 9.0 omega/25 mu m. The saturation temperature of the low-voltage heating ink heating module with the size of 2cm multiplied by 2.5cm under the working voltage of 5V can reach 76 ℃.
Example 7:
weighing 8% of water-based acrylic resin, 5% of rosin resin, 12% of graphite, 3% of carbon black, 40% of carbon nanotube dispersion liquid, 0.5% of formamide, 0.5% of ethanolamine, 3% of NUOSPERSE FX 365 type water-based wetting dispersant, 0.3% of xanthan gum, 0.6% of DefomW-0506 type water-based defoaming agent and 27.1% of deionized water according to parts by mass.
Placing 8% of water-based acrylic resin, 5% of rosin resin, 0.5% of formamide, 0.5% of ethanolamine and 27.1% of deionized water in a stirring kettle, stirring for 5-10 min, after uniformly mixing, sequentially adding 3% of carbon black and 12% of graphite, uniformly stirring, finally adding 3% of NUOSPERSE FX 365 type water-based wetting dispersant and 0.6% of DefomoW-0506 type water-based defoaming agent, and uniformly stirring to form primary heating ink; mixing the primary heating ink and the ball-milled beads according to the mass ratio of 3:1, placing the mixture in an electric stirrer to be mixed and dispersed for 2.5h, taking out and filtering the mixture, and finally placing the primary heating ink in a sand mill to be ground until the particle size is below 5 mu m to obtain the low-voltage heating ink.
The low-voltage heat-generating ink obtained in the example has a viscosity of 13000mPa · s under stirring at a rotation speed of 12r/min, has a thickness of 21 μm after drying, can be used for screen printing of a 200-mesh screen printing plate once, and has a sheet resistance value of 10.9 Ω/25 μm. The saturation temperature of the low-voltage heating ink heating module with the size of 2cm multiplied by 2.5cm under the working voltage of 5V can reach 71 ℃.
The low-voltage heating ink provided by the invention can obtain a better heating effect under a lower working voltage; the low-voltage heating ink has high viscosity and high thixotropy, the viscosity of the ink is instantly reduced under the action of shearing force in the printing process to form a thick carbon film, the viscosity is rapidly improved after the printing is finished, the ink is prevented from diffusing on a printing stock, the printing adaptability of the ink is improved, and the low-voltage heating ink is suitable for screen printing. The xanthan gum in the components can play a role in dispersing graphene, carbon black and graphite, can replace part of acrylic resin, and the addition of a small amount of rosin resin can make up the poor adhesive force and mechanical property of the xanthan gum; under the combined action of the xanthan gum and the rosin resin, the overall proportion of acrylic resin in the ink is reduced, the xanthan gum and the rosin resin are both biomass materials, the energy-saving and environment-friendly effects can be achieved, and in addition, the addition of the xanthan gum and the rosin resin enables the proportion of conductive fillers such as carbon black, graphite and carbon nano tubes in a carbon film formed after the prepared low-voltage heating ink is dried to be increased, and the conductivity is excellent.

Claims (10)

1. The utility model provides a take antifalsification label of lens, includes the stratum basale at least, its characterized in that: the anti-counterfeiting label comprises a base layer and is characterized in that a low-voltage heating ink layer, a shielding layer, a label printing layer and a lens are sequentially arranged on the base layer, the lens is a lens with variable curvature, and the low-voltage heating ink layer is connected with a power supply located on the outer side of the anti-counterfeiting label.
2. A lensed security label according to claim 1, wherein: the power supply is a USB interface or a switch capable of being connected with electricity and a battery, the low-voltage heating ink layer is connected with the power supply through a conducting wire made of conductive ink or conductive metal, and the USB interface or the switch capable of being connected with electricity is located on the outer side of the anti-counterfeit label.
3. A lensed security label according to claim 1, wherein: the lens with the variable curvature is made of one of polymethyl methacrylate and polycarbonate or a combination of the polymethyl methacrylate and the polycarbonate in any proportion.
4. A lensed security label according to claim 1, wherein: the label printing layer is printed with a label.
5. The lensed security label of claim 4, wherein: the color of the shielding layer is different from the color of the label printed by the label printing layer.
6. A lensed security label according to claim 1, wherein: the low-voltage heating ink layer comprises the following components in percentage by mass: 5-10% of water-based acrylic resin, 5-10% of rosin resin, 5-15% of graphite, 3-10% of carbon black, 0-50% of carbon nanotube dispersion liquid, 0.5-1.5% of pH regulator, 1-5% of dispersing agent, 0-1% of xanthan gum, 0.5-1% of defoaming agent and 10-50% of deionized water.
7. The lensed security label of claim 6, wherein: the low-voltage heating ink layer is formed by coating low-voltage heating ink on the substrate layer through a screen printing or coating method.
8. The lensed security label of claim 6, wherein: the pH regulator is one or more of formamide, ethanolamine or ammonia water mixed in any proportion.
9. The lensed security label of claim 6, wherein: the dispersant is one of Dispenser W-518 type aqueous wetting dispersant, Dispenser W-920 type aqueous wetting dispersant, NUOSPERSE FX 600 type aqueous wetting dispersant or NUOSPERSE FX 365 type aqueous wetting dispersant or a mixture of the two in any proportion.
10. The lensed security label of claim 6, wherein: the defoaming agent is one or more of a DefomW-0506 type waterborne defoaming agent, a TEGO Foamex 805 type waterborne defoaming agent or a SF-809B type standard silicon fluoride defoaming agent which is mixed in any proportion.
CN202010700724.2A 2020-07-17 2020-07-17 Anti-counterfeit label with lens Pending CN111862780A (en)

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CN108084823A (en) * 2017-12-18 2018-05-29 中南大学 A kind of electric-heating coatings and its preparation method and application
CN109337448A (en) * 2018-10-17 2019-02-15 江苏扬中印刷有限公司 A kind of electrically conductive ink and preparation method thereof
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11258998A (en) * 1998-03-13 1999-09-24 Konica Corp Adhesive label, film with lens having the same, and processing method of the same film with lens
CN103436074A (en) * 2013-08-05 2013-12-11 南昌大学 Preparation method of water-based conductive ink
CN203721122U (en) * 2014-01-27 2014-07-16 南京天朗制药有限公司 Anti-fake or temperature label based on visual image change
CN106998597A (en) * 2017-03-20 2017-08-01 北京旭碳新材料科技有限公司 Electric heating device and device and preparation method thereof
CN106883679A (en) * 2017-03-27 2017-06-23 国网山东省电力公司威海供电公司 A kind of distribution line temperature-sensitive paster
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CN110054930A (en) * 2019-03-12 2019-07-26 北京爱上地科技有限公司 A kind of aqueous double-component electric heating ink and preparation method thereof

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Application publication date: 20201030