A press-type paper-based intelligent display label based on gravure printing and a manufacturing method thereof

Abstract

The invention discloses a push-type paper-based intelligent display label based on gravure printing and a manufacturing method thereof. The push-type paper-based intelligent display label comprises a packaging layer using a polyethylene terephthalate film with certain flexibility, a polymer display layer made by gravure printing using a conductive polymer ink with a display function, an ion conduction layer made by pouring and freezing an aqueous solution of aluminum perchlorate and polyethylene oxide, a metal film layer as a label contact, and paper as a substrate layer. The key information display of the paper-based intelligent display label is turned on by pressing the contact, thereby enhancing the anti-counterfeiting information display effect of the product and the interactive experience of the user. The preparation method is environmentally friendly, low-cost, and simple in process. The push-type paper-based intelligent display label has obvious display effect, rapid information display, and stable information retention. The label can be used on printed and packaged products to realize self-driven anti-counterfeiting information display of the product and increase its added value.

Description

Technical Field

[0001] The present invention belongs to the field of semiconductor technology and relates to a press-type paper-based intelligent display label based on gravure printing and a manufacturing method thereof. Background Art

[0002] Smart labels are considered to be highly promising smart technologies due to their portability, flexibility, quick response, product feature display, anti-counterfeiting, and interactivity. Common smart labels include PP packaging labels, PVC card labels, fragile labels, ABS material labels, and silicone labels. Technologies such as RFID, chemical reactions, enzyme catalysis, temperature, and humidity are often used. At present, smart labels have been successfully applied to logistics, food, fabrics, packaging, wearable devices, etc. However, these smart labels are disposable, non-reusable, or require external drive. The press-type paper-based smart display label can achieve self-drive and display by pressing without consuming external power. With the continuous advancement of new material technology and printing technology, it has become possible to prepare press-type paper-based smart display labels on packaging materials through gravure printing. Usually, the characteristics of the material and the difference in the ability of ion embedding are used to form display, potential difference, and other characteristics, thereby achieving efficient self-driven information display. At the same time, the press-type paper-based smart display label has the characteristics of small size, simple structure, flexibility, lightness, continuous stability, fast and obvious display, which not only improves the consumer experience, but also gives the self-driven display technology of packaging products a higher technical content.

[0003] Therefore, it is a relatively advanced solution to utilize the characteristic effects of the material itself and the uniqueness of the label structure to prepare paper-based smart display labels through printing, and to achieve fully controllable information display under active pressing. It not only improves the display controllability of the product and achieves the purpose of anti-counterfeiting, but also enhances the consumer experience and promotes sales. Summary of the invention

[0004] The object of the present invention is to provide a press-type paper-based intelligent display label based on gravure printing and a method for making the same, so as to enhance the anti-counterfeiting information display effect of the product and the user experience.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A press-type paper-based smart display label based on gravure printing, which includes, from top to bottom, a packaging layer, a metal film layer, an ion conduction layer, a polymer display layer and a substrate layer;

[0007] An ink prepared with a mixed solution of poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid, N-methylpyrrolidone and ethanol as raw materials in an aqueous dispersed phase is used. The ink and pure citric acid are printed and dried in sequence on a base layer by gravure printing to form a polymer display layer. An aqueous solution of aluminum perchlorate and polyethylene oxide is frozen on the polymer display layer to form an ion conductive layer, which is then covered with a metal film layer and encapsulated to form a press-type paper-based smart display label based on gravure printing.

[0008] Furthermore, the ink is a mixed solution of poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid, N-methylpyrrolidone and ethanol with a mass fraction of 1.3% of the aqueous dispersion phase; wherein the mass ratio of the poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid aqueous dispersion to N-methylpyrrolidone is (93-97):(7-3), the solution obtained by mixing the two is recorded as N-PEDOT:PSS, and the mass ratio of N-PEDOT:PSS to ethanol is (90-95):(10-5).

[0009] Furthermore, the mass ratio of aluminum perchlorate, polyethylene oxide and water in the raw materials for preparing the ion conductive layer is (1-2):1:(6-10).

[0010] Furthermore, the packaging layer is a polyethylene terephthalate film; the base layer is a coated paper; and the metal film layer is a zinc foil, an aluminum foil or an iron foil with a thickness of 0.01 to 0.5 mm.

[0011] Furthermore, the polymer display layer is produced by gravure printing with a screen line count of 150-200 l / in.

[0012] A method for preparing a press-type paper-based smart display label based on gravure printing comprises the following steps:

[0013] Step 1: Design the structure of a press-type paper-based smart display label; design a gravure printing plate with key anti-counterfeiting information;

[0014] Step 2: ultrasonically cleaning the polyethylene terephthalate film;

[0015] Step 3: Mixing poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid aqueous dispersion and N-methylpyrrolidone at a mass ratio of (93-97):(7-3), recorded as N-PEDOT:PSS, and mixing N-PEDOT:PSS with ethanol at a mass ratio of (90-95):(10-5) to prepare a polymer display layer raw material;

[0016] Step 4: Printing the polymer display layer of the paper-based smart display label on coated paper using the raw material prepared in step 3 as ink using a gravure printing device;

[0017] Step 5: Drying the polymer display layer of the paper-based smart display label in an oven;

[0018] Step 6: Prepare the gravure printing plate with anti-counterfeiting information designed in step 1, and use pure citric acid to form the anti-counterfeiting key information on the surface of the polymer display layer after the drying treatment in step 5 by gravure printing to obtain the display part of the paper-based smart display label;

[0019] Step 7: Mix the polydimethylsiloxane solution and the curing agent in a volume ratio of 10:1, let it stand for defoaming, then pour it into a glass dish, and dry it in an oven to obtain solid polydimethylsiloxane;

[0020] Step 8: Stick solid polydimethylsiloxane around the polyethylene terephthalate film cleaned in step 2 as a height-enhancing packaging ring to form a square closed groove; leave a pressing space in a specific area of ​​the square closed groove;

[0021] Step 9: using aluminum perchlorate, polyethylene oxide and water to prepare an ion conductive layer solid film; placing a metallic film having a thickness lower than that of the height-enhancing packaging ring in the reserved specific pressing space to prepare the metal film layer; obtaining the packaging part of the paper-based smart display label;

[0022] Step 10: Attach the packaging part of the paper-based smart display label produced in step 9 to the display part of the paper-based smart display label produced in step 6 to complete the assembly of the press-type paper-based smart display label.

[0023] Furthermore, in step 6, a layer of key information is gravure-printed on the surface of the polymer display layer after the drying treatment in step 5 with an appropriate amount of pure citric acid at room temperature, and after keeping it for 20 minutes, the film is dried in an oven at 105° C. for 30 minutes to display anti-counterfeiting information.

[0024] Furthermore, the oven drying temperature in step 7 is 60° C. and the drying time is 30 minutes.

[0025] Furthermore, in step 2, the polyethylene terephthalate film is first wiped with detergent, and then ultrasonically cleaned with deionized water and alcohol for 5 minutes, and then dried with nitrogen.

[0026] Furthermore, the oven drying temperature in step 5 is 105° C. and the drying time is 30 minutes.

[0027] Compared with the prior art, the present invention has the following beneficial technical effects:

[0028] The present invention uses a mixed solution of poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid aqueous dispersion, N-methylpyrrolidone and ethanol as an ink suitable for gravure printing as a polymer display layer of a paper-based smart display label, and realizes rapid self-driving and high-contrast information display by pressing a specific position on the top of the paper-based smart display label, thereby providing a unique self-driven anti-counterfeiting information display effect.

[0029] The press-type paper-based smart display label based on gravure printing of the present invention comprises a packaging layer made of polyethylene terephthalate film with certain flexibility, a polymer display layer made by gravure printing of conductive polymer ink with display function, an ion conduction layer made by pouring and freezing an aqueous solution of aluminum perchlorate and polyethylene oxide, a metal film layer as a label contact, and paper as a base layer. Through a specially designed structure, the paper-based smart display label is originally disconnected; when a specific position on the top of the label is pressed, the paper-based smart display label is connected, thereby realizing self-driven information display without an external power supply, enhancing the product's anti-counterfeiting information display effect and the user's interactive experience.

[0030] The method for making a press-type paper-based smart display label based on gravure printing of the present invention adopts gravure printing to realize the preparation of the press-type paper-based smart display label, and provides a reliable solution for realizing high-level self-driven anti-counterfeiting and added value improvement of products such as flexible printing and packaging. The preparation method is environmentally friendly, low-cost, and simple in process, and the press-type paper-based smart display label with obvious display effect, rapid information display, and stable information retention is obtained, which can be used on printed packaging products to realize the self-driven anti-counterfeiting information display of the product and increase its added value.

[0031] The press-type paper-based intelligent display label printed by the present invention uses an appropriate amount of pure citric acid to print specific information on the dried polymer display layer by gravure printing, so as to improve the display effect of the specific information part of the polymer display layer and enhance anti-counterfeiting. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the structure of a press-type paper-based smart display label based on gravure printing. Figure 1 ;

[0033] Figure 2 This is a schematic diagram of the structure of a press-type paper-based smart display label based on gravure printing. Figure 2 ;

[0034] FIG3( a ) is a design diagram of a metal film layer;

[0035] FIG3( b ) is a design diagram of the ion conducting layer;

[0036] FIG3( c ) is a design diagram of a polymer display layer;

[0037] Figure 3(d) is a gravure printing plate design;

[0038] Figure 4 It is an example diagram of a press-type paper-based smart display label;

[0039] Among them: 1. base layer, 2. polymer display layer, 3. ion conduction layer, 4. metal film layer, 5. heightened packaging ring, 6. packaging layer. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention are described clearly and completely below.

[0041] The present invention provides a press-type paper-based smart display label structure, which uses poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid (PEDOT:PSS) in a water-dispersed phase as a raw material to prepare an ink suitable for gravure printing, and prints and dries the ink and pure citric acid on a paper substrate in sequence by gravure printing, thereby realizing the preparation of a functional layer of the paper-based smart display label.

[0042] The conductive polymer ink with display characteristics is a mixed solution of poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid, N-methylpyrrolidone and ethanol with a mass fraction of 1.3% of the aqueous dispersion phase; the mass ratio of the poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid aqueous dispersion to N-methylpyrrolidone is (93-97):(7-3), and the solution obtained by mixing the two is recorded as N-PEDOT:PSS, and the mass ratio of N-PEDOT:PSS to ethanol is (90-95):(10-5), and the specific amount used is based on the requirements of gravure printing.

[0043] like Figure 1 and Figure 2 As shown, the press-type paper-based smart display label based on gravure printing is composed of five layers distributed from top to bottom: an encapsulation layer 6, a metal film layer 4, an ion conduction layer 3, a polymer display layer 2, and a base layer 1. The metal film layer 4 is made by cutting zinc foil; the ion conduction layer 3 is made by pouring and freezing an aqueous solution of aluminum perchlorate and polyethylene oxide; and the polymer display layer 2 is made by gravure printing of a conductive polymer ink with display characteristics.

[0044] The raw material of the polymer display layer 2 is a mixed solution of poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid (PEDOT:PSS) in an aqueous dispersion phase, N-methylpyrrolidone (NMP) and ethanol (EA); the encapsulation layer 6 is a clean polyethylene terephthalate (PET) film; the base layer 1 is a clean coated paper; the raw material of the ion conductive layer 3 is an aqueous solution of aluminum perchlorate (Al(ClO4)3) and polyethylene oxide (PEO); the raw material of the metal film layer 4 is a zinc foil with a thickness of 0.01 to 0.5 mm.

[0045] Combination Figure 1 , Figure 3(a), Figure 3(b), Figure 3(c), Figure 3(d) and Figure 4 The method for making a press-type paper-based smart display label based on gravure printing is specifically implemented according to the following steps:

[0046] Step 1: Design the structure of a push-type paper-based smart display label. Among them, the metal film layer 4, the ion conductive layer 3, and the polymer display layer 2 are designed to be of appropriate size, and the shapes are shown in Figure 3 (a), Figure 3 (b) and Figure 3 (c). The polymer display layer 2 of the push-type paper-based smart display label is made by gravure printing with a screen line number of 150-200l / in, and the ion conductive layer 3 is prepared by a square closed groove surrounded by solid polydimethylsiloxane (PDMS) with a thickness of 0.8 to 2mm on a PET film. Design a gravure printing plate with key anti-counterfeiting information, the shape of which is shown in Figure 3 (d); prepare before preparation according to the above-mentioned structural dimensions and gravure printing parameters.

[0047] Step 2: To ensure that the conductive polymer ink with display characteristics can be well wetted on the coated paper, the mass ratio of poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid (PEDOT:PSS) aqueous dispersion to N-methylpyrrolidone (NMP) is (93-97): (7-3), and the solution obtained by mixing the two is recorded as N-PEDOT:PSS. The mass ratio of N-PEDOT:PSS to ethanol (EA) is (90-95): (10-5), so that it meets the requirements of gravure printing. The three are mixed, stirred at room temperature for 1 hour, and ultrasonicated for 30 minutes to ensure that the solution is evenly dispersed.

[0048] Step 3: Use a gravure printing device with a printing width of 50 mm, a cell depth of 50 μm, a screen angle of 53°, and a screen line count of 150-200 l / in to print the polymer display layer of the press-type paper-based smart display label on clean coated paper at a printing pressure of 600-700 N and a printing speed of 0.2 m / s using the ink prepared in step 2.

[0049] Step 4: Place the printed polymer display layer in an oven at 105° C. and dry it for 30 minutes to make it fully dry.

[0050] Step 5: Make the gravure printing plate with anti-counterfeiting information designed in step 1, and gravure print pure citric acid. Pure citric acid is gravure printed on the surface of the polymer display layer after drying in step 4 to form key anti-counterfeiting information. After keeping it for 20 minutes, the film is dried in an oven at 105°C for 30 minutes to obtain the display part of the paper-based smart display label.

[0051] Step 6: Mix the polydimethylsiloxane (PDMS) solution and the curing agent in a volume ratio of 10:1, let it stand for defoaming, and then pour it into a glass dish. After drying in an oven at 60° C. for 30 minutes, solid polydimethylsiloxane (PDMS) is obtained.

[0052] Step 7: A solid polydimethylsiloxane (PDMS) with a thickness of 0.8 to 2 mm is attached around the cleaned PET film as a height-enhancing packaging ring 5 to form a square closed groove; a pressing space is left at a distance of 0.3 to 0.5 cm from the upper edge of the square closed groove;

[0053] Step 8: Dissolve 1-2 g of aluminum perchlorate (Al(ClO4)3) in 1 g of water to prepare an aluminum perchlorate solution, then add 5-9 g of water into a beaker, place it on a hot plate at 80°C, slowly add 1 g of polyethylene oxide (PEO) while heating, stir until PEO is completely dissolved, then pour in the aluminum perchlorate solution, continue heating for 20 minutes, pour the solution in the beaker into the square closed groove prepared in step 7 and flatten it, put it into a low temperature of -10 to -20°C for 30 minutes and take it out to complete the preparation of the ion conductive layer 3.

[0054] Step 9: Place a Zn foil with a thickness lower than that of the heightened packaging ring in the reserved specific pressing space to complete the preparation of the metal film layer; together with the ion conductive layer prepared in step 8, form the packaging part of the paper-based smart display label.

[0055] Step 10: Lay the packaging part of the paper-based smart display label prepared in step 9 on the display part of the paper-based smart display label prepared in step 5 to complete the assembly of the press-type paper-based smart display label;

[0056] Finally, a paper-based smart display label based on gravure printing is formed, and the structure is as follows Figure 1 As shown in the figure, when a specific position on the top of the paper-based smart display label is pressed, the paper-based smart display label will automatically drive the information to be displayed. The actual effect is shown in the figure Figure 4 shown.

[0057] Example 1

[0058] A method for making a press-type paper-based smart display label based on gravure printing is specifically implemented according to the following steps:

[0059] (1) Design the structure of a push-type paper-based smart display label. The size of the metal film layer is 0.2×0.3 cm, the size of the ion conductive layer is 3.6×1.6 cm, and the size of the polymer display layer is 4×2 cm. The shapes are shown in Figure 3 (a), Figure 3 (b) and Figure 3 (c). The polymer display layer of the push-type paper-based smart display label is made by gravure printing with a printing width of 50 mm, a cell depth of 50 μm, a screen angle of 53°, and a screen line number of 150 l / in. The ion conductive layer is prepared by a square closed groove surrounded by solid PDMS with a thickness of 0.8 mm on a PET film. Design a gravure printing plate with the letter "W", the shape of which is shown in Figure 3 (d); prepare before preparation according to the above structural dimensions and gravure printing parameters.

[0060] (2) To ensure that the conductive polymer ink with display characteristics can be well wetted on the single-sided coated paper, the mass ratio of poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid (PEDOT:PSS) aqueous dispersion to N-methylpyrrolidone is 93:7, and the solution obtained by mixing the two is recorded as N-PEDOT:PSS. The mass ratio of N-PEDOT:PSS to ethanol is 9:1, so that it meets the requirements of gravure printing. The three are mixed, stirred at room temperature for 1 hour, and ultrasonicated for 30 minutes to ensure that the solution is evenly dispersed.

[0061] (3) Using a gravure printing device with a printing width of 50 mm, a cell depth of 50 μm, a screen angle of 53°, and a screen line number of 150 l / in, the ink prepared in step (2) is used as the ink, and the polymer display layer of the press-type paper-based smart display label is printed on a clean single-sided coated paper at a printing pressure of 600 N and a printing speed of 0.2 m / s.

[0062] (4) The printed polymer display layer was placed in an oven at 105°C for 30 minutes to allow it to dry completely.

[0063] (5) Prepare the gravure printing plate with anti-counterfeiting information designed in step (1), and gravure print pure citric acid. Pure citric acid is gravure printed on the surface of the polymer display layer after the drying treatment in step 4 to form the key anti-counterfeiting information. After keeping it for 20 minutes, the film is dried in an oven at 105° C. for 30 minutes to obtain the display part of the paper-based smart display label.

[0064] (6) The PDMS solution and the curing agent were mixed in a volume ratio of 10:1, allowed to stand for defoaming, and then poured into a glass dish. After drying in an oven at 60° C. for 30 minutes, solid PDMS was obtained.

[0065] (7) A solid PDMS with a thickness of 0.8 mm is pasted around the cleaned PET film as a heightened packaging ring to form a square closed groove; a pressing space is left 0.3 cm away from the upper edge of the square closed groove.

[0066] (8) Dissolve 1 g of aluminum perchlorate (Al(ClO4)3) in 1 g of water to prepare an aluminum perchlorate solution. Then add 5 g of water into a beaker and place it on a hot plate at 80°C. Slowly add 1 g of PEO while heating and stir until the PEO is completely dissolved. Then pour in the aluminum perchlorate solution and continue heating for 20 min. Then pour the solution in the beaker into the square closed groove prepared in step (7) and flatten it. Place it in a low temperature of -10°C for 30 min and take it out to complete the preparation of the ion conductive layer.

[0067] (9) A Zn foil with a thickness of 0.01 mm is placed in the reserved specific pressing space to complete the preparation of the metal film layer, which together with the ion conductive layer prepared in step (8) forms the packaging part of the paper-based smart display label.

[0068] (10) Laminating the packaging part of the paper-based smart display label prepared in step (9) with the display part of the paper-based smart display label prepared in step (5) to complete the assembly of the press-type paper-based smart display label;

[0069] Finally, a paper-based smart display label based on gravure printing is formed, and the structure is as follows Figure 1 As shown in the figure, when the word "press" on the top of the paper-based smart display label is pressed, the paper-based smart display label will automatically drive the information to display. The actual effect is shown in the figure Figure 4 shown.

[0070] Example 2

[0071] A method for making a press-type paper-based smart display label based on gravure printing is specifically implemented according to the following steps:

[0072] (1) Design the structure of a push-type paper-based smart display label. The size of the metal film layer is 0.2×0.3 cm, the size of the ion conductive layer is 3.6×1.6 cm, and the size of the polymer display layer is 4×2 cm. The shapes are shown in Figure 3 (a), Figure 3 (b) and Figure 3 (c). The polymer display layer of the push-type paper-based smart display label is made by gravure printing with a printing width of 50 mm, a cell depth of 50 μm, a screen angle of 53°, and a screen line number of 175 l / in. The ion conductive layer is prepared by a square closed groove surrounded by solid PDMS with a thickness of 1.5 mm on a PET film. Design a gravure printing plate with the letter "W", the shape of which is shown in Figure 3 (d); prepare before preparation according to the above structural dimensions and gravure printing parameters.

[0073] (2) To ensure that the conductive polymer ink with display characteristics can be well wetted on the single-sided coated paper, the mass ratio of poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid (PEDOT:PSS) aqueous dispersion to N-methylpyrrolidone is 95:5, and the solution obtained by mixing the two is recorded as N-PEDOT:PSS. The mass ratio of N-PEDOT:PSS to ethanol is 93:7, which meets the requirements of gravure printing. The three are mixed, stirred at room temperature for 1 hour, and ultrasonicated for 30 minutes to ensure that the solution is evenly dispersed.

[0074] (3) Using a gravure printing device with a printing width of 50 mm, a cell depth of 50 μm, a screen angle of 53°, and a screen line number of 175 l / in, the ink prepared in step (2) is used as the ink, and the polymer display layer of the press-type paper-based smart display label is printed on a clean single-sided coated paper at a printing pressure of 650 N and a printing speed of 0.2 m / s.

[0075] (4) The printed polymer display layer was placed in an oven at 105°C for 30 minutes to allow it to dry completely.

[0076] (5) Prepare the gravure printing plate with anti-counterfeiting information designed in step (1), and gravure print pure citric acid. Pure citric acid is gravure printed on the surface of the polymer display layer after the drying treatment in step 4 to form the key anti-counterfeiting information. After keeping it for 20 minutes, the film is dried in an oven at 105° C. for 30 minutes to obtain the display part of the paper-based smart display label.

[0077] (6) The PDMS solution and the curing agent were mixed in a volume ratio of 10:1, allowed to stand for defoaming, and then poured into a glass dish. After drying in an oven at 60° C. for 30 minutes, solid PDMS was obtained.

[0078] (7) A solid PDMS with a thickness of 1.5 mm is pasted around the cleaned PET film as a heightened packaging ring to form a square closed groove; a pressing space is left 0.4 cm away from the upper edge of the square closed groove.

[0079] (8) Dissolve 1.6 g of aluminum perchlorate (Al(ClO4)3) in 1 g of water to prepare an aluminum perchlorate solution. Then add 7 g of water into a beaker and place it on a hot plate at 80°C. Slowly add 1 g of PEO while heating and stir until the PEO is completely dissolved. Then pour in the aluminum perchlorate solution and continue heating for 20 min. Then pour the solution in the beaker into the square closed groove prepared in step (7) and flatten it. Place it in a low temperature of -15°C for 30 min and take it out to complete the preparation of the ion conductive layer.

[0080] (9) A Zn foil with a thickness of 0.08 mm is placed in the reserved specific pressing space to complete the preparation of the metal film layer, which together with the ion conductive layer prepared in step (8) forms the packaging part of the paper-based smart display label.

[0081] (10) Laminating the packaging part of the paper-based smart display label prepared in step (9) with the display part of the paper-based smart display label prepared in step (5) to complete the assembly of the press-type paper-based smart display label;

[0082] Finally, a paper-based smart display label based on gravure printing is formed, and the structure is as follows Figure 1 As shown in the figure, when the word "press" on the top of the paper-based smart display label is pressed, the paper-based smart display label will automatically drive the information to display. The actual effect is shown in the figure Figure 4 shown.

[0083] Example 3

[0084] A method for making a press-type paper-based smart display label based on gravure printing is specifically implemented according to the following steps:

[0085] (1) Design the structure of a push-type paper-based smart display label. The size of the metal film layer is 0.2×0.3 cm, the size of the ion conductive layer is 3.6×1.6 cm, and the size of the polymer display layer is 4×2 cm. The shapes are shown in Figure 3 (a), Figure 3 (b) and Figure 3 (c). The polymer display layer of the push-type paper-based smart display label is made by gravure printing with a printing width of 50 mm, a cell depth of 50 μm, a screen angle of 53°, and a screen line number of 200 l / in. The ion conductive layer is prepared by a square closed groove surrounded by solid PDMS with a thickness of 2 mm on a PET film. Design a gravure printing plate with the letter "W", the shape of which is shown in Figure 3 (d); prepare before preparation according to the above structural dimensions and gravure printing parameters.

[0086] (2) To ensure that the conductive polymer ink with display characteristics can be well wetted on the single-sided coated paper, the mass ratio of poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid (PEDOT:PSS) aqueous dispersion to N-methylpyrrolidone is 97:3, and the solution obtained by mixing the two is recorded as N-PEDOT:PSS. The mass ratio of N-PEDOT:PSS to ethanol is 95:5, so that it meets the requirements of gravure printing. The three are mixed, stirred at room temperature for 1 hour, and ultrasonicated for 30 minutes to ensure that the solution is evenly dispersed.

[0087] (3) Using a gravure printing device with a printing width of 50 mm, a cell depth of 50 μm, a screen angle of 53°, and a screen line number of 200 l / in, the ink prepared in step (2) is used as the ink, and the polymer display layer of the press-type paper-based smart display label is printed on a clean single-sided coated paper at a printing pressure of 700 N and a printing speed of 0.2 m / s.

[0088] (4) The printed polymer display layer was placed in an oven at 105°C for 30 minutes to allow it to dry completely.

[0089] (5) Prepare the gravure printing plate with anti-counterfeiting information designed in step (1), and gravure print pure citric acid. Pure citric acid is gravure printed on the surface of the polymer display layer after the drying treatment in step 4 to form the key anti-counterfeiting information. After keeping it for 20 minutes, the film is dried in an oven at 105° C. for 30 minutes to obtain the display part of the paper-based smart display label.

[0090] (6) The PDMS solution and the curing agent were mixed in a volume ratio of 10:1, allowed to stand for defoaming, and then poured into a glass dish. After drying in an oven at 60° C. for 30 minutes, solid PDMS was obtained.

[0091] (7) A solid PDMS with a thickness of 2 mm is pasted around the cleaned PET film as a heightened packaging ring to form a square closed groove; a pressing space is left in the square closed groove at a distance of 0.5 cm from the upper edge.

[0092] (8) Dissolve 2 g of aluminum perchlorate (Al(ClO4)3) in 1 g of water to prepare an aluminum perchlorate solution. Then add 9 g of water into a beaker and place it on a hot plate at 80°C. Slowly add 1 g of PEO while heating and stir until the PEO is completely dissolved. Then pour in the aluminum perchlorate solution and continue heating for 20 min. Then pour the solution in the beaker into the square closed groove prepared in step (7) and flatten it. Place it in a low temperature of -20°C for 30 min and take it out to complete the preparation of the ion conductive layer.

[0093] (9) A Zn foil with a thickness of 0.5 mm is placed in the reserved specific pressing space to complete the preparation of the metal film layer, which together with the ion conductive layer prepared in step (8) forms the packaging part of the paper-based smart display label.

[0094] (10) Laminating the packaging part of the paper-based smart display label prepared in step (9) with the display part of the paper-based smart display label prepared in step (5) to complete the assembly of the press-type paper-based smart display label;

[0095] Finally, a paper-based smart display label based on gravure printing is formed, and the structure is as follows Figure 1As shown in the figure, when the word "press" on the top of the paper-based smart display label is pressed, the paper-based smart display label will automatically drive the information to display. The actual effect is shown in the figure Figure 4 shown.

Claims

1. A press-type paper-based smart display label based on gravure printing, characterized in that: The invention comprises, from top to bottom, an encapsulation layer (6), a metal film layer (4), an ion conduction layer (3), a polymer display layer (2) and a substrate layer (1); An ink prepared with a mixed solution of poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid, N-methylpyrrolidone and ethanol as raw materials is used, and the ink and pure citric acid are sequentially printed and dried on a base layer (1) by gravure printing to form a polymer display layer (2), and an aqueous solution of aluminum perchlorate and polyethylene oxide is frozen on the polymer display layer (2) to form an ion conduction layer (3), which is then covered with a metal film layer (4) and packaged to form a press-type paper-based smart display label based on gravure printing.

2. The press-type paper-based smart display label based on gravure printing according to claim 1, characterized in that: The ink is a mixed solution of poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid, N-methylpyrrolidone and ethanol with a mass fraction of 1.3% of the aqueous dispersion phase; the mass ratio of the poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid aqueous dispersion to N-methylpyrrolidone is (93-97):(7-3), the solution obtained by mixing the two is recorded as N-PEDOT:PSS, and the mass ratio of N-PEDOT:PSS to ethanol is (90-95):(10-5).

3. The press-type paper-based smart display label based on gravure printing according to claim 1, characterized in that: The mass ratio of aluminum perchlorate, polyethylene oxide and water in the raw materials for preparing the ion conductive layer is (1-2):1:(6-10).

4. The gravure-printed press-type paper-based smart display label according to claim 3, characterized in that: The packaging layer (6) is a polyethylene terephthalate film; the base layer (1) is a coated paper; and the metal film layer (4) is a zinc foil, an aluminum foil or an iron foil with a thickness of 0.01 to 0.5 mm.

5. The press-type paper-based smart display label based on gravure printing according to claim 1, characterized in that: The polymer display layer (2) is produced by gravure printing with a screen line count of 150-200 l / in.

6. A method for preparing a press-type paper-based smart display label based on gravure printing as claimed in claim 4, characterized in that The following steps are involved: Step 1: Design the structure of a press-type paper-based smart display label; design a gravure printing plate with key anti-counterfeiting information; Step 2: ultrasonically cleaning the polyethylene terephthalate film; Step 3: Mix poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid aqueous dispersion and N-methylpyrrolidone at a mass ratio of (93-97): (7-3), recorded as N-PEDOT:PSS, and mix N-PEDOT:PSS with ethanol at a mass ratio of (90-95): (10-5) to prepare a polymer display layer raw material; Step 4: Printing the polymer display layer of the paper-based smart display label on coated paper using the raw material prepared in step 3 as ink using a gravure printing device; Step 5: Drying the polymer display layer of the paper-based smart display label in an oven; Step 6: Prepare the gravure printing plate with anti-counterfeiting information designed in step 1, and use pure citric acid to form the anti-counterfeiting key information on the surface of the polymer display layer after the drying treatment in step 5 by gravure printing to obtain the display part of the paper-based smart display label; Step 7: Mix the polydimethylsiloxane solution and the curing agent in a volume ratio of 10:1, let it stand for defoaming, then pour it into a glass dish, and dry it in an oven to obtain solid polydimethylsiloxane; Step 8: Stick solid polydimethylsiloxane around the polyethylene terephthalate film cleaned in step 2 as a height-enhancing packaging ring to form a square closed groove; leave a pressing space in a specific area of ​​the square closed groove; Step 9: using aluminum perchlorate, polyethylene oxide and water to prepare an ion conductive layer solid film; placing a metallic film having a thickness lower than that of the height-enhancing packaging ring in a reserved specific pressing space to achieve the preparation of a metallic film layer; Obtaining a packaging portion of a paper-based smart display label; Step 10: Attach the packaging part of the paper-based smart display label produced in step 9 to the display part of the paper-based smart display label produced in step 6 to complete the assembly of the press-type paper-based smart display label.

7. The method for preparing a press-type paper-based smart display label based on gravure printing according to claim 6, characterized in that: In step 6, a layer of key information is gravure-printed on the surface of the polymer display layer after the drying treatment in step 5 with an appropriate amount of pure citric acid at room temperature, and after keeping it for 20 minutes, the film is dried in an oven at 105° C. for 30 minutes to display anti-counterfeiting information.

8. The method for preparing a press-type paper-based smart display label based on gravure printing according to claim 6, characterized in that: The oven drying temperature in step 7 is 60° C. and the drying time is 30 minutes.

9. The method for preparing a press-type paper-based smart display label based on gravure printing according to claim 6, characterized in that: In the step 2, the polyethylene terephthalate film is first wiped with detergent, and then ultrasonically cleaned with deionized water and alcohol for 5 minutes, and then dried with nitrogen.

10. The method for preparing a press-type paper-based intelligent display label based on gravure printing according to claim 6, characterized in that: The oven drying temperature in step 5 is 105° C. and the drying time is 30 minutes.

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