Anti-forgery paper, production equipment and production method of anti-forgery paper

Abstract

The application provides a production equipment of anti-fake paper, comprising a paper machine, the paper machine comprises a surface layer net, a core layer net and a bottom layer net, a gantry is arranged at a position before a surface-core composite roller of the core layer net; and / or a gantry is arranged at a position before a bottom-core composite roller of the bottom layer net; the gantry comprises a crossbeam, the length direction of the crossbeam is parallel to the width direction of the core layer net or the bottom layer net, an electric actuator is arranged on the crossbeam, a printing module is connected to the electric actuator, the printing module comprises a UV nozzle, and the printing module is arranged above the core layer net and / or the bottom layer net. The production equipment of anti-fake paper, the production method and the anti-fake paper have the characteristics of high resolution, large height span, intuitive anti-fake effect, five anti-fake, high anti-fake reliability and identification, low cost and the like, and are suitable for full-load operation of a high-speed paper machine.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of anti-fake paper production, and particularly relates to an anti-fake paper, an anti-fake paper production device and a production method. BACKGROUND

[0002] Anti-fake paper is a special paper with marks or hidden records on the surface, which is not easy to be imitated, counterfeited or changed. The existing anti-fake technology applied in papermaking can be divided into the following types: 1. Buried security line method. Gold wire or plastic wire is embedded in the middle of the paper during papermaking. The shape of the security line is divided into straight line, wavy line, zigzag line and the like. This method is widely used in banknote printing. However, the disadvantage is that the equipment is complex and the cost is high. 2. Color fiber method. Color fiber or color chips are mixed into the paper pulp or sprinkled on the surface of the paper when the paper is not yet shaped. The red and blue fiber silk mixed into the paper pulp is divided into color fiber and colorless fluorescent fiber. The former can be seen by the naked eye, and the latter needs to be seen by ultraviolet light. The defect is that the anti-fake is relatively single and easy to imitate. 3. Chemical encryption method. Special chemicals are added to the pulp. The chemicals can be revealed on the surface of the paper by applying a developing agent. Similarly, this method is easy to imitate. 4. Layered dyeing method. For example, color dyes are added to the core layer pulp, or the headbox is modified to allow different colored pulp to be sprayed, which is sandwiched between the paper, and the core layer can be seen by lifting the surface layer or the bottom layer. This method is not easy to imitate, but it will cause the core layer system to have dye, and when producing other paper, the system needs to be stopped and cleaned, resulting in low production efficiency and waste of water resources. And the cost of modifying the headbox is higher. 5. Watermark method. This method is an early anti-fake technology, which is simple in structure, but only suitable for low-speed paper machines with low basis weight. For high-speed paper machines and high-basis-weight paper, there are great limitations.

[0003] In order to solve the problems existing in the above methods, several technical solutions have been published. The Chinese patent document with publication number CN1936180A discloses a processing method of anti-fake paper. The core layer pulp is sprayed onto the core layer wire through the core layer headbox, and the core layer wet paper sheet is formed by dehydration through the dehydration device. After the wet paper sheet passes through the digital nozzle, the surface is sprayed with emulsion containing anti-fake pigment. The water solvent in it flows into the recovery tank for recycling after penetrating the core layer wire. However, in this method, the digital nozzle is used to spray the pigment onto the core layer wet paper sheet. The particle size of the pigment is usually between 0.05um and 1mm. The digital nozzle can only spray a large area of dyeing, and the dyeing range is large. It cannot print Chinese characters, characters, pictures and the like. Since the pigment cannot penetrate and contains many small particles, the moisture content of the wet paper sheet is very high, and it has tensile property. In the subsequent process, the pattern formed by the pigment is easy to deform due to the speed and heating drying. The large-area pigment spraying on the surface of the core layer also increases the difficulty of compounding with the surface layer, and increases the manufacturing cost.

[0004] The Chinese patent document with publication number CN101967777A discloses a kind of anti-fake white cardboard and its manufacturing method, the disclosed method is to place a dye nozzle under the core layer net after forming core layer pulp, spray upwards through the core layer net, there is a vacuum dehydration tank above the paper in this area, while dehydrating, dye is absorbed into the core layer paper sheet, this technical solution is simple in structure and well solves many drawbacks of layered dyeing method, but the disadvantage is low dye use efficiency, part of the dye will enter white water system with the core layer net.

[0005] The Chinese patent document with publication number CN111391522A discloses a kind of high-speed digital code printing anti-fake white cardboard production method and code printing equipment, the manufacturing method is to use high-speed code printer to print code at a distance (2mm-5mm) close to the net of the core layer of the paper machine, the disadvantages are: one is that the distance to the net is too close, the net itself will shake up and down when running at high speed, once the nozzle contacts the net, it will surely break the paper, and even the net and the nozzle will be damaged; two is that the working principle of high-speed digital code printer limits its inability to print out high-resolution large characters or patterns. The maximum speed of high-speed digital code printer is 300m / min when printing a single row of simple small characters, which is far from the speed of paper machine which is as high as 1000m / min, and seriously limits the production capacity of the paper machine. SUMMARY

[0006] The technical problem solved by the present application is to provide an anti-fake paper, production equipment and production method of anti-fake paper, with high resolution of anti-fake trademark or text, large span of trademark or font height, intuitive and reliable anti-fake effect, five anti-fake effects, high anti-fake reliability and identification, not easy to be imitated, low production cost, and suitable for full-load operation of high-speed paper machine.

[0007] To solve the above problems, one aspect of the present application provides a kind of production equipment of anti-fake paper, including paper machine, the paper machine includes net part, the net part includes face layer net, core layer net, bottom layer net, the wet paper sheet formed on the face layer net is compounded with the wet paper sheet formed on the core layer net through face-core compound roller, the wet paper sheet formed on the bottom layer net is compounded with the wet paper sheet formed on the core layer net through bottom-core compound roller:

[0008] The position of the core layer net before the face-core compound roller is provided with a portal frame;And / or, the position of the bottom layer net before the bottom-core compound roller is provided with a portal frame;

[0009] The gantry comprises a crossbeam, the length direction of the crossbeam is parallel to the width direction of the core layer net or the bottom layer net, an electric actuator is arranged on the crossbeam, a printing module is connected to the electric actuator, the printing module comprises a UV nozzle, the electric actuator is used to drive the printing module to move back and forth along the length direction of the crossbeam and move up and down along the vertical direction, and the printing module is located above the core layer net and / or the bottom layer net.

[0010] Preferably, the gantry further comprises a first vertical column and a second vertical column, two ends of the crossbeam are connected to the top ends of the first vertical column and the second vertical column respectively, and the first vertical column is detachably connected to the crossbeam.

[0011] Preferably, a controller, an input device and a display device are further comprised, the input device, the display device and the electric actuator are electrically connected to the controller respectively, the controller is used to control the electric actuator according to the signal input by the input device and display data on the display device.

[0012] Preferably, a first heating assembly is further comprised, the first heating assembly is suitable for heating the gantry and the printing module.

[0013] Preferably, the printing module comprises a printing unit, the printing unit comprises a shell and a UV nozzle arranged on the shell, the shell is a double-layer shell, and a second heating assembly is arranged in the interlayer of the double-layer shell.

[0014] Preferably, a cooling water coil radiator is further arranged in the shell, the cooling water channel of the cooling water coil radiator is connected to a water cooler, and a water pump is used to provide circulating power for the cooling water coil radiator.

[0015] Preferably, the double-layer shell is made of 316L stainless steel and is subjected to polishing treatment, and a three-element EPDM sealing strip is arranged at the joint of the plates of the double-layer shell.

[0016] The second aspect of the present application provides a production method of anti-fake paper, which is produced by using the production equipment of anti-fake paper.

[0017] S1. preparing a surface layer pulp, a core layer pulp and a bottom layer pulp;

[0018] S2. dehydrating the surface layer pulp, the core layer pulp and the bottom layer pulp through a surface layer net, a core layer net and a bottom layer net respectively to form a surface layer wet paper sheet, a core layer wet paper sheet and a bottom layer wet paper sheet respectively;

[0019] S3. Before the core layer wet paper sheet is compounded with the surface layer wet paper sheet, ink is jet-printed on the core layer wet paper sheet, or before the core layer wet paper sheet is compounded with the bottom layer wet paper sheet, ink is jet-printed on the bottom layer wet paper sheet to form an anti-counterfeiting text or pattern, and the ink is solidified to form an anti-counterfeiting layer;

[0020] S4. After the jet printing is completed, the core layer wet paper sheet is compounded with the surface layer wet paper sheet, and then compounded with the bottom layer wet paper sheet, and then subjected to subsequent papermaking processes to complete the production of the anti-counterfeiting paper.

[0021] Preferably, the ink is one or a combination of UV quick-drying ink, pigment waterproof quick-drying ink, and oil-based quick-drying ink.

[0022] The third aspect of the present application provides an anti-counterfeiting paper produced by the above-mentioned production method of anti-counterfeiting paper.

[0023] Compared with the prior art, the present application has the following beneficial effects:

[0024] The production equipment, production method, and produced anti-counterfeiting paper of the present application have high resolution of anti-counterfeiting trademarks or texts, large span of trademark or font height, and intuitive and reliable anti-counterfeiting effect. The anti-counterfeiting paper has five anti-counterfeiting effects, high anti-counterfeiting reliability and identification, is not easy to be imitated, has low production cost, and is suitable for full-load operation of a high-speed paper machine.

[0025] The production equipment of the anti-fake paper of the embodiment can produce anti-fake paper with five anti-fake effects: 1. By adjusting the inkjet resolution, pulp ratio and basis weight, the text or pattern sprayed inside the paper can be clearly observed by the naked eye without damaging the paper structure, which is completely different from the visual effect of directly printing text and pattern on the surface of the paper, and is not easy to be imitated; 2. By adjusting the inkjet resolution, pulp ratio and basis weight, the text or pattern sprayed inside the paper can be observed by the naked eye without damaging the paper structure, which has a hazy feeling, high anti-fake identification and is not easy to be imitated. 3. By adjusting the inkjet resolution, pulp ratio and basis weight, the text or pattern sprayed inside the paper cannot be observed by the naked eye without damaging the paper structure. However, the text and pattern can be clearly observed by peeling off the surface layer of the paper, which has high anti-fake identification and is difficult to imitate. 4. By adjusting the inkjet resolution, pulp ratio and basis weight, the text or pattern sprayed inside the paper cannot be observed by the naked eye without damaging the paper structure. The text or pattern inside the paper is clearly displayed on the surface of the paper by wiping the surface of the paper with a wet cloth or other ways of wetting the surface of the paper. When the paper is dried, the previously displayed text and pattern disappear. The above operation is still effective after repeated several times, which has high anti-fake identification, simple anti-fake verification method and great difficulty in imitation. 5. By adjusting the inkjet resolution, pulp ratio and basis weight, the text or pattern sprayed inside the paper cannot be observed by the naked eye without damaging the paper structure. However, the displayed font and pattern have a concave-convex feeling on the surface by wiping the surface of the paper with a wet cloth or other ways of wetting the surface of the paper. When the paper is dried, the position where the font and pattern disappear still has a concave-convex feeling. This feature can effectively prevent illegal businessmen from recycling old packaging boxes for counterfeiting and selling, effectively protect the brand value of related enterprises, effectively protect the rights and interests of consumers, and escort more Chinese brands. The clamping with this feature makes the anti-fake identification of the product higher and the imitation more difficult.

[0026] The anti-fake paper of the application can be applied to paper with a grammage of 60g / m 2 The paper machine with a speed of 1200M / min or less can be widely applied to various paper types such as coated white cardboard, white cardboard, coated white paperboard, kraft paper, coated kraft paper, kraft paper, white kraft paper, and copper plate paper. The anti-fake effect is intuitive and reliable, has five anti-fake effects, high anti-fake reliability and identification, is not easy to be imitated, and has the characteristics of low production cost. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structural schematic view of the production equipment of the anti-fake paper of embodiment 1 of the application;

[0028] Figure 2This is a schematic diagram of the gantry and printing module in the anti-counterfeiting paper production equipment described in Embodiment 1 of the present invention;

[0029] Figure 3 This is a schematic diagram of the printing unit in the anti-counterfeiting paper production equipment described in Embodiment 1 of the present invention;

[0030] Figure 4 This is a schematic diagram of the anti-counterfeiting paper described in Embodiment 3 of the present invention.

[0031] Wherein: 1-Top layer screen; 2-Core layer screen; 3-Bottom layer screen; 4-Top and bottom layer composite roller; 5-Gantry frame; 51-Crossbeam; 52-Column; 53-Column; 6-Printing module; 61-Printing unit; 611-Shell; 612-UV printhead; 613-Cooling water coil radiator; 7-Top layer headbox; 8-Core layer headbox; 9-Bottom layer headbox; 10-Low vacuum dehydration box; 11-High vacuum dehydration box; 12-Sizing layer; 13-Bottom layer paper; 14-Core layer paper; 15-Anti-counterfeiting layer; 16-Top layer paper; 17-Sizing layer. Detailed Implementation

[0032] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1

[0034] like Figure 1 As shown, the anti-counterfeiting paper production equipment of this embodiment includes a paper machine, which includes a wire section. The wire section includes a surface wire 1, a core wire 2, and a bottom wire 3. The wet paper sheet formed on the surface wire 1 and the wet paper sheet formed on the core wire 2 are laminated by a surface-core composite roller 4. The wet paper sheet formed on the bottom wire 3 and the wet paper sheet formed on the core wire 2 are laminated by a bottom-core composite roller.

[0035] A gantry frame 5 is provided at a position before the face core composite roller 4 for the core layer mesh 2; or a gantry frame 5 is provided at a position before the bottom core composite roller for the bottom layer mesh 3;

[0036] The gantry frame 5 includes a crossbeam 51, the length direction of which is parallel to the width direction of the core layer mesh 2 or the bottom layer mesh 3. An electric actuator is provided on the crossbeam 51, and a printing module 6 is connected to the electric actuator. The electric actuator is used to drive the printing module 6 to move back and forth along the length direction of the crossbeam 51 and to move up and down in the vertical direction. The printing module 6 is located above the core layer mesh 2 or the bottom layer mesh 3.

[0037] In the production equipment, the gantry and the printing module can be arranged above the core layer wire 2 to print on the core layer wet paper sheet to form the anti-counterfeiting pattern or text on the core layer wet paper sheet, or can be arranged above the bottom layer wire 3 to print on the bottom layer wet paper sheet to form the anti-counterfeiting pattern or text on the bottom layer wet paper sheet. Alternatively, the production equipment can not include the core layer wire, and only include the surface layer wire and the bottom layer wire, that is, a two-layer papermaking wire paper machine, the printing module is arranged above the bottom layer wire, and the formed anti-counterfeiting paper is composed of the surface layer paper and the bottom layer paper. Alternatively, the production equipment can include a plurality of core layer wires, that is, a four-layer papermaking wire or a five-layer papermaking wire paper machine, the printing module is arranged above one or more core layer wires or above the bottom layer wire, and the formed anti-counterfeiting paper is composed of the surface layer paper, the plurality of core layer papers and the bottom layer paper. As a specific embodiment, in the embodiment, the production equipment includes the bottom layer wire, the core layer wire and the surface layer wire, and the gantry and the printing module are arranged above the core layer wire.

[0038] In the production equipment of the anti-counterfeiting paper, the surface layer slurry is dehydrated through the surface layer wire to form a surface layer wet paper sheet, the core layer slurry is dehydrated through the core layer wire to form a core layer wet paper sheet, and the bottom layer slurry is dehydrated through the bottom layer wire to form a bottom layer wet paper sheet. When the core layer wet paper sheet passes through the position of the printing module of the gantry, the electric actuator moves left and right to adjust the horizontal distance of the printing, and the electric actuator moves up and down to adjust the height of the printing module from the wire, for example, to 10 mm from the paper surface. The printing module sprays ink droplets on the core layer wet paper sheet, and a large number of ink droplets are arranged according to the control software settings under the control of the main controller of the printing module, so as to form text or patterns according to the preset resolution. Subsequently, the content after being printed is solidified on the wet paper sheet. The core layer wet paper sheet is compounded with the surface layer wet paper sheet through the surface-core compound roller, and then is compounded with the bottom layer wet paper sheet through the surface-bottom compound roller. The compounded wet paper sheet is subjected to subsequent processes to finally form the anti-counterfeiting paper. In the embodiment, the UV nozzle is used in the printing module, that is, the UV printer nozzle, which can spray UV ink. The particle size of the UV ink is less than 1 um, and the size of the ink droplets is 20-25 pl. Therefore, Chinese characters, characters and even pictures can be sprayed, and the resolution is very high. Furthermore, multiple nozzles can be further coordinated, and further synchronization compensation on the software program can be made, so that the equipment can still obtain a very high resolution in the state of high-speed printing.

[0039] In some embodiments, the production equipment for anti-counterfeiting paper further includes: a surface layer desander, a surface layer pressure screen, and a surface layer headbox 7 arranged in sequence; a core layer pressure screen and a core layer headbox 8 arranged in sequence; a bottom layer desander, a bottom layer pressure screen, and a bottom layer headbox 9 arranged in sequence; a low-vacuum dewatering box and a high-vacuum dewatering box arranged in sequence below the surface layer mesh; a low-vacuum dewatering box 10 and a high-vacuum dewatering box 11 arranged in sequence below the core layer mesh; and a low-vacuum dewatering box and a high-vacuum dewatering box arranged in sequence below the bottom layer mesh. The surface layer pulp is sprayed onto the surface layer mesh through the surface layer desander, surface layer pressure screen, and surface layer headbox, and then passes through the low-vacuum dewatering box and high-vacuum dewatering box to form a surface layer wet paper sheet; the core layer pulp is sprayed onto the core layer mesh through the core layer pressure screen and core layer headbox, and then passes through the low-vacuum dewatering box and high-vacuum dewatering box to form a core layer wet paper sheet; and the bottom layer pulp is sprayed onto the bottom layer mesh through the bottom layer desander, bottom layer pressure screen, and bottom layer headbox, and then passes through the low-vacuum dewatering box and high-vacuum dewatering box to form a bottom layer wet paper sheet.

[0040] In some embodiments, a UV curing lamp is also provided above the core layer mesh, located behind the gantry. The wet core layer paper sheet printed by the printing module is irradiated by the UV lamp, and the printed content is instantly cured on the paper sheet.

[0041] like Figure 2 As shown, in some embodiments, the gantry frame 5 includes: a crossbeam 51, a column 52, and a column 53. The two ends of the crossbeam 51 are connected to the tops of the columns 52 and 53, respectively, and the columns 52 and crossbeam 51 are detachably connected. During maintenance shutdown, the column 52 on the operating side of the gantry frame can be disassembled, and after removal, the gantry frame forms a cantilever beam structure to facilitate replacement of the core mesh.

[0042] The gantry frame and the electric actuator installed on it are existing technologies. Its structure can be selected according to the existing technology. For example, guide rails can be installed on the crossbeam of the gantry frame, and the electric actuator can be movably installed on the guide rails. The electric actuator can be an electric hoist, and the lifting part of the electric hoist is connected to the printing module. The specific structure will not be described in detail here.

[0043] In some embodiments, the anti-counterfeiting paper production equipment further includes a controller, an input device, and a display device. The input device, display device, and electric actuator are electrically connected to the controller. The controller controls the electric actuator according to the signals received from the input device and displays the data on the display device. As a specific implementation, the controller can be a PLC, and the walking logic and safety protection interlocks of the electric actuator can be integrated into the PLC control program to improve the control accuracy and safety of the electric actuator. The input device and display device can be implemented using a touch screen. A touch screen is installed on-site and connected to the PLC via a network. The position of the printing module can be set on the screen, and one-button automatic positioning can be achieved as needed.

[0044] During operation, the high-temperature and high-humidity environment of the paper machine net department and the high-speed operation of the net can raise a large amount of fine fibers, which are suspended in the air and can seriously affect the normal operation of the ordinary printing module. Even if the fiber group is gathered to a certain extent on the module, it can fall onto the net case and cause paper breakage. Therefore, in some embodiments, the anti-counterfeit paper production equipment further comprises a first heating assembly adapted to heat the gantry 5 and the printing module 6, so that the outer wall temperature of the gantry and the printing module is higher than the ambient temperature, avoiding fiber aggregation. In some embodiments, the first heating assembly can use a hot air blower or a self-controlled low-temperature heat tracing band.

[0045] In some embodiments, the printing module specifically includes 6 sets of printing units 61 (which can not be limited to 6 sets), a main controller.

[0046] In some embodiments, the main controller is composed of a power supply controller and a computer connected by electricity, and the computer is built-in ink supply system control and printing system control.

[0047] In some embodiments, as shown in Figure 3 The printing unit 61 includes a shell 611, a UV nozzle 612 arranged on the shell 611, an ink supply system arranged in the shell, and a drive board arranged in the shell 611. The drive board is electrically connected with the main controller to control the ink supply and printing of the printing unit. The drive board controls the walking of the printing module. When the printing module walks, a large amount of heat will be generated. In order to increase the heat dissipation, a heat sink is added to each drive board. The stability of the drive circuit is improved to ensure the stable operation of the actuator.

[0048] In some embodiments, the shell 611 is a double-layer shell, and a second heating assembly is arranged in the interlayer of the double-layer shell. The second heating assembly arranged in the interlayer of the double-layer shell controls the temperature of the outer surface of the shell at about 60°C. Because the humidity in the production site of the net pressing part is very large, the setting of the second heating assembly can make the temperature of the shell higher than the ambient temperature, so as to avoid the condensation and dripping of the water vapor in the environment on the surface of the shell, which can affect the production. In some embodiments, the second heating assembly can be a self-controlled low-temperature heat tracing band.

[0049] Because the internal structure of the printing module is very precise, once the moisture and dust in the production site environment enter the internal structure of the printing module, it will cause harm to the electronic components of the printing module. In some embodiments, the double-layer shell is made of 316L stainless steel material and is subjected to polishing treatment to reduce the surface roughness. The splicing part of the double-layer shell is sealed by EPDM (Ethylene Propylene Diene Monomer) rubber strip, and the entire printing module is designed to be sealed.

[0050] In some embodiments, the shell 611 is also provided with a cooling water coil radiator 613, the cooling water passage of the cooling water coil radiator 613 is connected with the water cooler, and the circulation power of water to the cooling water coil radiator is provided by the water pump. The cooling water coil radiator has better refrigeration effect.

[0051] In some embodiments, the ink supply system comprises a main ink cartridge with a built-in liquid level meter, a filter connected with the outlet of the main ink cartridge, a secondary ink cartridge with a built-in liquid level switch, a filter connected with the outlet of the secondary ink cartridge, an ink supply pump and a one-way valve arranged on the pipeline connecting the main ink cartridge, the secondary ink cartridge and the printhead. The ink level sensor can realize ink shortage alarm. The main ink cartridge adopts constant pressure ink supply design. The recyclable oil circuit design of the secondary ink cartridge in the printing process ensures the smoothness of the ink supply system, which is conducive to the long-term stable operation of the printhead.

[0052] In some embodiments, the ink supply system further comprises a constant temperature control system suitable for heating the main ink cartridge and the secondary ink cartridge. The constant temperature control system of the ink supply ensures the constant temperature of the ink, which can prevent the ink from blocking the printhead on one hand and improve the printing quality on the other hand, so that the printing module can still continuously and stably print high-quality products in winter low-temperature environment.

[0053] In some embodiments, each printhead of the printing module has independent positive and negative pressure control, and the negative pressure precision is as high as 0.01 kpa. The accurate and adjustable ink pressure effectively guarantees the stability of continuous printing.

[0054] The production equipment of the anti-counterfeiting paper of the embodiment adopts UV spray heads, the spray heads in multiple spray printing units work in parallel, the content of the spray printing can be repeated by each spray head, thereby improving the resolution, in the case of the same resolution, the spray printing speed is improved by increasing the number of spray printing units and the number of spray heads. The highest spray printing speed that can be achieved is: the resolution is 360*400 dpi when the screen section vehicle speed is 1200 m / min; higher resolution can be obtained when the screen section vehicle speed of the paper machine is lower than 1200 m / min, and the resolution can be adjusted by combining the software setting subsequently; the horizontal resolution of the spray printing is 360 dpi, the lower limit of the vertical resolution is 100 dpi, and the upper limit is 4000 dpi, the resolution setting interval is 50 dpi. The ink drop size is 20-25 pl. The UV spray head can support printing fixed characters, variable characters, serial numbers, fixed images, and the following types of one-dimensional codes: ITF14, GS1128, JAN13, EAN13, EAN13+2, EAN13+5, JAN8, EAN8, EAN8+2, EAN8+5, UPCA, UPCA+2, UPCA+5, CODE128, CODE128A, CODE128B, CODE128C, ISBN13, CODE39(3of9), CODE93(9of3), CODE39 Extended, CODE93 Extended; the following types of two-dimensional codes: QR Code Mode12, Micro QR, PDF417, MicroPDF417, Data Matrix.

[0055] The production equipment of the anti-fake paper of the embodiment can produce anti-fake paper with five anti-fake effects: 1. By adjusting the inkjet resolution, slurry ratio and basis weight, the text or pattern sprayed inside the paper can be clearly observed by the naked eye without damaging the paper structure, which is completely different from the visual effect of directly printing text and pattern on the surface of the paper, and is not easy to be imitated; 2. By adjusting the inkjet resolution, slurry ratio and basis weight, the text or pattern sprayed inside the paper can be observed by the naked eye without damaging the paper structure, which has a hazy feeling, high anti-fake identification and is not easy to be imitated. 3. By adjusting the inkjet resolution, slurry ratio and basis weight, the text or pattern sprayed inside the paper cannot be observed by the naked eye without damaging the paper structure. However, the text and pattern can be clearly seen by peeling off the surface layer of the paper, which has high anti-fake identification and is difficult to imitate. 4. By adjusting the inkjet resolution, slurry ratio and basis weight, the text or pattern sprayed inside the paper cannot be observed by the naked eye without damaging the paper structure. By using a wet cloth to wipe the surface of the paper or other ways to wet the surface of the paper, the text or pattern inside the paper clearly appears on the surface of the paper. When the paper is dried, the previously appeared text and pattern disappear. The above operation is repeated several times, which has high anti-fake identification, simple anti-fake verification method and great difficulty in imitation. 5. By adjusting the inkjet resolution, slurry ratio and basis weight, the text or pattern sprayed inside the paper cannot be observed by the naked eye without damaging the paper structure. However, by using a wet cloth to wipe the surface of the paper or other ways to wet the surface of the paper, the font and pattern appear, and the surface has a concave-convex feeling when touched by hand. When the paper is dried, the position where the font and pattern disappear still has a concave-convex feeling when touched by hand. This feature can effectively prevent illegal businessmen from recycling old packaging boxes for counterfeiting and selling, effectively protect the brand value of related enterprises, effectively protect the rights and interests of consumers, and escort more Chinese brands. The clamping with this feature makes the anti-fake identification of the product higher and the imitation more difficult.

[0056] Embodiment 2

[0057] The production method of the anti-fake paper of the embodiment is produced by the above-mentioned production equipment of the anti-fake paper, which comprises the following steps:

[0058] S1. Slurry preparation, the surface layer slurry, core layer slurry and bottom layer slurry are prepared according to the process ratio;

[0059] S2. The surface layer slurry, core layer slurry and bottom layer slurry are respectively dehydrated through the surface layer net, core layer net and bottom layer net to form the surface layer wet paper, core layer wet paper and bottom layer wet paper;

[0060] S3. Before the core layer wet paper sheet and the surface layer wet paper sheet are laminated, ink is sprayed onto the core layer wet paper sheet as it passes through the inkjet printing module, and / or before the core layer wet paper sheet and the bottom layer wet paper sheet are laminated, ink is sprayed onto the bottom layer wet paper sheet as it passes through the inkjet printing module. A large number of ink droplets are arranged according to the control software settings and form text or patterns according to the preset resolution. Then, the core layer wet paper sheet or the bottom layer wet paper sheet after inkjet printing is irradiated by a UV curing lamp, and the inkjet content is instantly cured on the paper sheet to form an anti-counterfeiting layer.

[0061] S4. After printing, the core wet paper sheet is laminated with the surface wet paper sheet by the face-core laminating roller, and then laminated with the bottom wet paper sheet by the face-bottom laminating roller. At this point, the anti-counterfeiting process is completed. The laminated wet paper sheet is then subjected to subsequent processes such as pressing, drying, surface sizing, calendering, and coating to finally form anti-counterfeiting paper.

[0062] This method can involve printing ink on the core layer wet paper to form anti-counterfeiting patterns or text, or printing ink on the bottom layer wet paper to form anti-counterfeiting patterns or text. Alternatively, the method may omit the step of forming the core layer wet paper and only form the top layer wet paper and the bottom layer wet paper, then print ink on the bottom layer wet paper, resulting in anti-counterfeiting paper composed of the top layer paper and the bottom layer paper. Alternatively, the method may include the step of forming multiple layers of core layer wet paper, printing ink on one or more core layer wet paper sheets, or on the bottom layer wet paper, resulting in anti-counterfeiting paper composed of the top layer paper, multiple core layers paper, and the bottom layer paper. As a specific implementation, in this embodiment, the method forms the top layer wet paper, the core layer wet paper, and the bottom layer wet paper, and prints ink on the core layer wet paper.

[0063] The ink types can be UV quick-drying ink, pigment waterproof quick-drying ink, and oil-based quick-drying ink. Other reagents can also be added to the above inks to achieve specific anti-counterfeiting effects.

[0064] Example 3

[0065] like Figure 4 As shown, the anti-counterfeiting paper in this embodiment is the anti-counterfeiting paper prepared in Example 2. The anti-counterfeiting paper includes, from bottom to top, an sizing layer 12, a bottom layer paper 13, a core layer paper 14, an anti-counterfeiting layer 15, a top layer paper 16, and an sizing layer 17.

[0066] This anti-counterfeiting paper is suitable for a weight of 60g / m². 2The paper machine with the speed of 1200M / min or less can be widely applied to various paper types such as coated white cardboard, white cardboard, coated white board, kraft paper, coated kraft paper, kraft paper, white kraft paper, and art paper, etc. The anti-counterfeiting effect is intuitive and reliable, has five anti-counterfeiting, high anti-counterfeiting reliability and identification, is not easy to be imitated, and has low production cost.

[0067] Obviously, the above embodiments are only examples for clearly illustrating but not limiting the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. All the embodiments do not need to be exhausted here. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. An anti-counterfeiting paper production equipment, comprising a paper machine, the paper machine comprising a web section, the web section comprising a top layer web, a core layer web, a bottom layer web, a wet paper sheet formed on the top layer web is combined with a wet paper sheet formed on the core layer web through a top-core combining roller, and a wet paper sheet formed on the bottom layer web is combined with a wet paper sheet formed on the core layer web through a bottom-core combining roller, characterized in that: a gantry is arranged at a position of the core layer web before the top-core combining roller; and / or a gantry is arranged at a position of the bottom layer web before the bottom-core combining roller; the gantry comprises a crossbeam, a length direction of the crossbeam is parallel to a width direction of the core layer web or the bottom layer web, an electric actuator is arranged on the crossbeam, a printing module is connected to the electric actuator, the printing module comprises a UV nozzle, the electric actuator is used to drive the printing module to move back and forth along the length direction of the crossbeam and move up and down along a vertical direction, the printing module is located above the core layer web and / or the bottom layer web, and a UV curing lamp is further arranged at a position of the core layer web above the gantry to cure the content printed by the printing module on a wet paper sheet formed on the core layer web.

2. The anti-counterfeiting paper production equipment according to claim 1, characterized in that: the gantry further comprises a first vertical column and a second vertical column, two ends of the crossbeam are connected to top ends of the first vertical column and the second vertical column respectively, and the first vertical column is detachably connected to the crossbeam to form a cantilever structure after being detached.

3. The anti-counterfeiting paper production equipment according to claim 1, characterized in that: further comprising a controller, an input device and a display device, the input device, the display device and the electric actuator are electrically connected to the controller respectively, and the controller is used to control the electric actuator according to a signal input by the input device and display data on the display device.

4. The anti-counterfeiting paper production equipment according to claim 1, characterized in that: further comprising a first heating assembly, the first heating assembly is adapted to heat the gantry and the printing module.

5. The anti-counterfeiting paper production equipment according to claim 1, characterized in that: the printing module comprises a printing unit, the printing unit comprises a shell and a UV nozzle arranged on the shell, the shell is a double-layer shell, and a second heating assembly is arranged in a sandwich layer of the double-layer shell.

6. The anti-counterfeiting paper production equipment according to claim 5, characterized in that: a cooling water coil radiator is further arranged in the shell, a cooling water channel of the cooling water coil radiator is connected to a cold water machine, and a cold water pump is used to provide circulating power of water to the cooling water coil radiator.

7. The anti-counterfeiting paper production equipment according to claim 5, characterized in that: the double-layer shell is made of 316L stainless steel and is subjected to polishing treatment, and a three-element EP sealing rubber strip is arranged at a plate splicing position of the double-layer shell. The anti-counterfeiting paper production equipment according to any one of claims 1-7 is used for production, comprising the following steps: ​ ​ ​ ​ ​ ​ ​ 8. A method of producing a security paper, characterized by, ​ S1. preparing a top layer pulp, a core layer pulp, a bottom layer pulp; S2. dehydrating the top layer pulp, the core layer pulp, and the bottom layer pulp through a top layer net, a core layer net, and a bottom layer net respectively to form a top layer wet paper sheet, a core layer wet paper sheet, and a bottom layer wet paper sheet respectively; S3. before the core layer wet paper sheet is compounded with the top layer wet paper sheet, ink is jet-printed on the core layer wet paper sheet to form an anti-counterfeiting text or pattern, and the ink is solidified to form an anti-counterfeiting layer; and / or before the core layer wet paper sheet is compounded with the bottom layer wet paper sheet, ink is jet-printed on the bottom layer wet paper sheet to form an anti-counterfeiting text or pattern, and the ink is solidified to form an anti-counterfeiting layer; S4. after the jet-printing is completed, the core layer wet paper sheet is compounded with the top layer wet paper sheet, and then compounded with the bottom layer wet paper sheet, and then the subsequent papermaking process is performed to complete the production of the anti-counterfeiting paper.

9. The production method of the anti-counterfeiting paper according to claim 8, characterized in that: the ink is one or a combination of several of UV quick-drying ink, pigment waterproof quick-drying ink, and oil-based quick-drying ink.

10. An anti-counterfeiting paper produced by the production method of the anti-counterfeiting paper according to claim 8 or 9.

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