CN217145427U - Gravure connecting line printing structure for precise etching aluminum-plated film invisible anti-counterfeiting material - Google Patents

Abstract

The utility model discloses a stealthy anti-fake material gravure line printing structure of precision etching aluminizer, including from the bottom up's white cardboard ply, shift glue layer, varnish protective layer, aluminize the layer, anti-fake picture and text layer and printing picture and text layer. The anti-counterfeiting image-text layer of the utility model is arranged below the printing image-text layer, which can play a good role in protection, avoid damage, is convenient for verification and difficult to counterfeit, and the adopted gravure high-speed online composite transfer equipment almost does not need to increase any extra cost, thus realizing low-cost high-speed production of packaging products; the application range is wide, products such as various cigarette labels, medicine packages, cosmetics, wine boxes and the like can be flexibly applied, and some valuable securities, confidential documents and the like can be applied.

Description

Gravure line printing structure for precise etching aluminum-plated film invisible anti-counterfeiting material

Technical Field

The utility model relates to a stealthy anti-fake material gravure line printing structure of precision etching aluminizer belongs to paper products packing printing technical field.

Background

The development and business of society are more and more prosperous, manufacturers and consumers have higher and higher requirements for identifying the authenticity of products, and a plurality of anti-counterfeiting technologies of packaging presswork with mature application are promoted, and the following categories are mainly summarized and classified:

1. optical anti-counterfeiting technology: which utilize a multi-layer dielectric film structure of a thin film interference effect, a grating structure, and various types of holographic techniques using an information optical concept. The technologies mainly utilize basic laws of scattering, reflection, transmission, absorption, diffraction and the like generated when light interacts with substances to obtain a certain special visual effect, thereby achieving the purpose of identifying the authenticity of products. However, with the development of science and technology, the optical anti-counterfeiting means can be easily copied and copied.

2. The chemical anti-fake technology is that special ink is used to make printed matter obtain confidential information with special function, such as photochromism, thermochromism, fluorescent ink, etc. through printing process. The disadvantage is that as long as the counterfeit operator purchases the ink raw materials with the same effect, the counterfeit products with very close effect can be prepared, which is enough to be fake.

3. The product spouts the sign indicating number or adds the RFID chip, carries out single coding to the product, guarantees a product thing sign indicating number through high in the clouds big data, reaches anti-fake purpose. Its disadvantages are increased production steps and high cost.

4. The special packaging structure is as follows: the disposable packaging container is discarded by itself once opened and cannot be reused so as to prevent counterfeiting such as 'true bottle counterfeit wine', and the anti-counterfeiting mode is also called destructive anti-counterfeiting packaging in some cases. In addition, the anti-theft package used in food and beverage has certain anti-fake function to prevent theft and adulteration. Still others have complicated container designs that are difficult to counterfeit or incorporate into their own company know-how in terms of container construction and manufacturing processes. For example, the sealing tape of EMS, Lebai sealing tape, sealing label of the same-side computers in Qinghua province, sealing label of the packaging box of China sports lottery issuing equipment and the like in China express, a new 'primary-secondary anti-counterfeiting' technology is provided for anti-counterfeiting technology under the traditional idea of sealing by means of sealing tape, so that the anti-counterfeiting performance is further improved. Accordingly, individual paper product packages can increase manufacturing costs if the design mechanism is modified.

The prior anti-counterfeiting technologies are integrated, and have respective characteristics, but the same problems exist: special processing procedures are required, and the production cost is increased.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: provides a gravure line printing structure of a concealed anti-counterfeiting material of a precision etching aluminizer, which aims to solve the problems in the prior art.

The utility model discloses the technical scheme who takes does: a gravure line printing structure of a precise etching aluminized film invisible anti-counterfeiting material comprises a white cardboard paper layer, a transfer glue layer, a varnish protective layer, an aluminized layer, an anti-counterfeiting image-text layer and a printing image-text layer from bottom to top.

The utility model has the advantages that: compared with the prior anti-counterfeiting technology, the anti-counterfeiting image-text layer of the utility model is arranged below the printing image-text layer, which can play a good role in protection, avoid damage, is convenient for verification and difficult to counterfeit, and the adopted gravure high-speed online composite transfer equipment almost does not need to increase any extra cost, thus realizing low-cost high-speed production of packaging products; the application range is wide, products such as various cigarette labels, medicine packages, cosmetics, wine boxes and the like can be flexibly applied, and some valuable securities, confidential documents and the like can be applied.

Drawings

FIG. 1 is a schematic structural cross-sectional view of a precisely etched aluminizer, wherein 1, a base film layer, 2, a coating layer, 3, an anti-counterfeiting image-text layer, 4, an aluminized layer, 5 and a printing image-text layer are shown in the figure.

FIG. 2 is a schematic diagram showing the effect of precisely etching an aluminum-plated film.

FIG. 3 is a cross-sectional view of a gravure composite transfer printing structure of a precisely etched aluminum-plated film, wherein the cross-sectional view comprises a white cardboard layer 1, a transfer glue layer 2, a varnish protective layer 3, an aluminum-plated layer 4, an anti-counterfeiting image-text layer 5, and a printing image-text layer 6.

FIG. 4 is a production flow chart of gravure on-line printing of the precision etching aluminizer.

Detailed Description

The invention will be further described with reference to specific embodiments.

Example 1: as shown in fig. 3, the gravure connecting line printing structure for the invisible anti-counterfeiting material with the precisely etched aluminizer comprises a white cardboard paper layer 1, a transfer glue layer 2, a varnish protective layer 3, an aluminized layer 4, an anti-counterfeiting image-text layer 5 and a printing image-text layer 6 from bottom to top.

As shown in fig. 4, a printing method of a gravure on-line printing structure of a precision etching invisible anti-counterfeiting material comprises the following steps: the anti-counterfeiting graphic information is manufactured into an anti-counterfeiting gravure plate through a laser precision etching process, the plate is used for synchronously printing release resin ink during a bottom coating process of processing a PET base film surface, then vacuum aluminizing processing is carried out to obtain a PET aluminizer with the content of the precision etching anti-counterfeiting information, the aluminizer and single-side coated winding drum white card backing paper are subjected to composite transfer stripping, and online gravure processing is carried out to obtain the novel packaging material with a multilayer structure and an invisible anti-counterfeiting effect.

Example 2: as shown in fig. 1-4, a gravure on-line composite transfer printing method for precisely etching an aluminum-plated film. The method comprises the following steps: when the vacuum aluminizer is produced by adopting the conventional vacuum aluminizer production process, high-temperature gaseous aluminum particles are deposited and cooled on the surface of a moving film base material to form a continuous and bright metal aluminum layer, which is commonly called as the vacuum aluminizer. The method comprises the steps of pre-printing a layer of release resin ink pattern on a base film by prefabricating a precise etching gravure roller plate, so that when high-temperature aluminum powder is deposited and cooled on the surface of a base material, a continuous bright metal aluminum layer is obtained at a blank position, the metal aluminum layer at the pattern position is repelled by release resin, and the aluminum plated layer is only 45% -55% of the aluminum plated layer at the continuous blank position, so that an aluminum plated film material with a hidden pattern is obtained, and then the aluminum plated film material is placed in a gravure online transfer printing device for online transfer printing processing, so that a final finished product is obtained. The method comprises the following specific steps:

step 1, designing anti-counterfeiting pattern

According to the requirements of customer products, the registered trademarks or names of the products are typeset in a repeated combination arrangement mode to form parallel arrays with moderate density spacing, the whole layout is covered fully according to the size of the layout of the materials for product on-machine production, and the advantage of random repeated arrangement is that when the finished products are processed and produced in the post-process, no matter how shaped the finished products are cut, the main body positions of the finished products can retain anti-counterfeiting patterns, and the overprinting preparation is not required to be carried out in advance for post-forming.

Preferably, the trademark or the image and text selected to be anti-counterfeit in the step must use the pattern designed by a special edition, but cannot adopt the font in the conventional font library, and the font is not larger than the font of the computer small number four as much as possible, because the font is too large or too thick, direct appearance can be caused, the anti-counterfeit significance is lost, and the copying difficulty can be increased.

Step 2, manufacturing the anti-counterfeiting pattern gravure roller

And (3) selecting a base roller with the length suitable for the circumference of the plate according to the size of the typesetting breadth in the step (1), uniformly coating a photosensitive adhesive layer on the circumference of the roller body after the treatment of cleaning, flattening, electroplating, polishing and the like before plate making, and airing. And (2) making the layout pattern obtained in the step (1) into a negative film, covering the peripheral line of the registration plate on the photosensitive layer, carrying out exposure treatment, immersing the exposed plate roller into a developing solution, obtaining a mask mother plate by a method of dissolving part of photoresist, carrying out fine processing on the mask mother plate by adopting a laser etching process, and finally cleaning the residual photosensitive layer to obtain the prefabricated image-text gravure roller. The steps obtain precise etching patterns by utilizing the superior processing performances of non-contact processing, high flexibility, high processing speed, no noise, small heat affected zone, capability of focusing to the extremely small light spot of the laser wavelength level and the like of the laser etching, and ensure the high precision and the processing quality.

Preferably, the process needs to adopt a laser precision etching process for engraving, and has the advantages that the image-text depth can be controlled, and the engraving mesh angle is not limited. Preferably, the engraving parameters required by the process in the step are 6-8um of cell depth, 100-110 lines of mesh number and 250 meshes of mesh number;

preferably, the laser wavelength adopted in the step is 355nm, the repetition frequency of the laser is 40 kHz-60 kHz, the pattern processing precision is +/-2 um, and the temperature of the working environment is 20 +/-1 ℃.

Step 3, coating the printing base film

In order to ensure the effect of vacuum aluminizing and the post-processing transfer quality, the base film needs to be pre-coated. The processing order is that a base coat is evenly coated on the surface of a basal membrane, and then the graph-text gravure printing roller obtained in the step 2 is used for printing on the basal membrane. Preferably, the PET \ BOPP is adopted as a main base film material in the step, and the bottom coating ink used for printing is mainly polyacrylic acid, so that the method has the advantages of improving the surface tension of the film surface and facilitating the adsorption of the aluminum coating. The printing uses an ionotropic ink, which is based on silicone and has a completely opposite action to that of the primer.

Preferably, the printing speed of the step is controlled within the range of 250-280 m/min, the drying temperature is 90-110 ℃, the water content of the precoating film is required to be lower than 0.1%, and the surface tension of the coated base coat is required to reach 38-42 Dyn/cm 2.

Step 4, vacuum aluminizing is carried out on the precoated printing base film

And (3) loading the precoated printing base film obtained in the step (3) on an unreeling station of a vacuum evaporation machine, winding the film on a reeling station after passing through a cooling roller (evaporation roller), vacuumizing by using a vacuum pump to ensure that the vacuum degree in an evaporation chamber reaches above the specified requirement, and heating an evaporation boat to melt and evaporate high-purity aluminum wires into gaseous aluminum at high temperature. And starting the film winding system, and opening the baffle plate to deposit and cool gaseous aluminum particles on the surface of the moving film substrate after the film running speed reaches a rated value to obtain the aluminizer. In the step, a shallow thin release resin pattern is pre-printed on part of the base film layer, so that the position of the base film layer has weak resistance to aluminum powder to repel the accumulation of the aluminum powder, but because the amount of gaseous aluminum powder particles in a vacuum evaporation plating machine is extremely large, after the repulsion of the position of the pre-coating pattern is reduced, about 40% -50% of the aluminum powder still forms accumulation and cooling on the position of the base film layer, the final appearance of the aluminizer is visually observed as a continuous and bright film surface, which is not consistent with that of a conventional aluminizer product, but the passing rate of the aluminizer to bright light is obviously different. After this process, a PET aluminum-plated film containing a precisely etched dark-grained pattern was obtained.

Preferably, the vacuum degree in the evaporation chamber is required to be 4 multiplied by 10 < -4 > mba to 6 multiplied by 10 < -4 > mba in the step, the diameter of the used aluminum wire is 2mm, the purity is more than 99.9 percent, the evaporation temperature is 1300 to 1400 ℃, the winding speed of the base film is 280 to 320m/min, the optimal aluminum feeding speed is 0.4 to 0.7 m/min, and the average aluminum layer thickness of the aluminized film is 100 to 300A degrees.

Step 5, rewinding inspection is carried out on the aluminizer

In the step, the prefabricated precision etched aluminizer obtained in the step 4 needs to be detected and rewound, and wrinkles, holes, brown stripes, stretching deformation, obvious leakage of anti-counterfeiting patterns and joint treatment are protected and removed. The finished product precisely etched aluminized film subjected to the step needs to be tightly wound and protected by a preservative film, needs to be tightly packaged and stored in a clean, cool and dry environment. Can be transported without rain or sunshine. When printing and drying are carried out, the environmental humidity needs to be controlled well, and particularly in the south area with moisture and rain, the film roll which is opened and packaged needs to be used up at one time to prevent the film roll from being affected with moisture and being oxidized and deteriorated.

Step 6, compound transfer of the precision etching aluminizer and the white cardboard

And (5) performing online composite transfer on the precisely etched aluminum-plated film and the single-side coated roll of the white card paper, and adopting water-based transfer glue.

Preferably, the single-side coated roll white cardboard is 225-230 g/square meter.

Preferably, the viscosity of the water-based transfer glue used in the step is 65 +/-5S, and the solid content is more than or equal to 55%. The composite pressure is 1.5-2, the drying temperature of the oven is 110-120 ℃, the drying air quantity is 75-88 cubic meters, and the length of the drying tunnel is not less than 30 meters.

Preferably, the computer-installing process in the step adopts a laser-engraved ceramic anilox roll as a gluing roller, and the number of the screen lines of the ceramic anilox roll is 90-100 lines, and the depth of a screen hole is 32-40 mu m. Compared with the traditional extrusion coating sizing process, the sizing amount and uniformity can be more accurately controlled, and the yield can be improved by 6-10% compared with the traditional process;

step 7, gravure on-line printing

And 6, after the step 6 is finished, obtaining the aluminized transfer paper with the precise etched hidden pattern, directly carrying out online printing processing on the aluminized transfer paper with the precise etched hidden pattern and a multicolor gravure printing unit, and drying to obtain a final printed product.

Preferably, the printing speed in the step is 180-250 m/min;

preferably, the equipment adopted in the step is a Siludi R960 gravure unit, and the Siludi R960 gravure unit is the first domestic gravure equipment integrating compounding, transferring, common printing and UV rotary printing. The method fully utilizes the advantages of the Serudina device, changes the traditional mode of division completion of printing and papermaking industries, can directly connect the line to enter a gravure production link after finishing the manufacture of the precision etching anti-counterfeiting aluminizing composite transfer paper material, realizes the extension of printing enterprises to the upstream of an industrial chain, shortens the process flow, and effectively reduces the production cost.

And 9, processing the semi-finished product after printing and inspecting the finished product.

The subsequent production requirements are basically consistent with the processing requirements of the conventional gravure printing production product, and the inspection package is delivered to customers for use after the post-process processing is finished.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention, therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims (1)

1. The utility model provides a precision etching aluminizer stealthy anti-fake material gravure line printing structure which characterized in that: the anti-counterfeiting paper comprises a white cardboard layer (1), a transfer glue layer (2), a varnish protective layer (3), an aluminum-plated layer (4), an anti-counterfeiting image-text layer (5) and a printing image-text layer (6) from bottom to top.

Images