CN113715541B - Micro-nano structure anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil and production equipment and method - Google Patents
Micro-nano structure anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil and production equipment and method Download PDFInfo
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- CN113715541B CN113715541B CN202111063671.9A CN202111063671A CN113715541B CN 113715541 B CN113715541 B CN 113715541B CN 202111063671 A CN202111063671 A CN 202111063671A CN 113715541 B CN113715541 B CN 113715541B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/14—Security printing
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Abstract
The invention discloses a micro-nano structure anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil, and production equipment and a method thereof. Wherein the method comprises full-plate coating a release layer on a base film; mirror-printing a color image-text printing layer on the release layer, and coating an EVA coating layer on the release layer; the EVA coating layer is in a semi-molten state and is subjected to calendaring treatment; then, a micro-nano structure mould pressing holographic image-text layer is formed by adopting hot roll mould pressing; vacuum evaporating zinc sulfide layer on the holographic graph-text layer, and coating hydrophilic oil layer; vacuum evaporating a metal layer on the hydrophilic oil layer; cleaning the hydrophilic oil layer to strip part of the metal layer to form hollowed-out graphics and texts; and arranging a hidden image-text layer on the metal layer, uploading anti-counterfeiting information of the hidden image-text layer, and finally coating an adhesive layer to prepare the micro-nano structure anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil. The invention adopts a mode of first printing and then scalding, improves the thermoprinting quality, realizes the combination of various micro-nano structure photoetching film pressing effects, color pictures and texts and anti-counterfeiting, and increases the product expression diversity.
Description
Technical Field
The invention relates to the technical field of printing, in particular to a micro-nano structure anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil, and production equipment and method thereof.
Background
With the improvement of product package printing technology, the gold stamping technology is widely applied in the field of package printing. At present, the technology of firstly scalding and then printing is widely applied to cigarette label packaging, but the technology difficulty is also very high, and the reasons mainly comprise: firstly, in the hot stamping process, electrochemical aluminum is required to be directly hot stamped on paper, so that high requirements are made on the flatness of the paper, and otherwise, the problem of poor transfer can occur; secondly, the bonding strength between the electrochemical aluminum and the surface of the paper is required to be high, so that the quality stability of the electrochemical aluminum is required to be high, the peeling force of the electrochemical aluminum is required to be kept constant, and if the viscosity of glue between the paper and the hot stamping foil is insufficient or unstable, the hot stamping foil is extremely easy to be reversely pulled by the influence of the viscosity of the ink in the secondary overprinting process, so that a pile blanket phenomenon is formed, and the production efficiency and the product quality are seriously influenced. Thirdly, in order to ensure that the stamping pressure is enough, the requirements of the stamping technology after stamping on the stamping equipment are that a round stamping machine and a round flattening stamping machine are selected preferentially, and then the flat stamping machine is adopted. The conventional rotary stamping press faces the risks of high pressure adjustment difficulty and product quality problems caused by uneven pressure. Fourthly, the existing hot stamping foil has only mould pressing aluminizing or zinc plating, the effect is single, and the hot stamping pattern does not contain anti-counterfeiting function or only has anti-counterfeiting function but does not have color graphics and texts under the general condition;
meanwhile, the positioning stamping technology can be applied to printing products with anti-counterfeiting graphics and texts to improve the anti-counterfeiting capacity of the products, and meanwhile, the gold stamping metallic feeling can also improve the packaging grade of the products. The holographic positioning thermoprinting machine has very high control requirements on temperature, pressure and speed, the selection of the thermoprinting machine type has great influence on the effect of the thermoprinting machine type, and the large-area on-site thermoprinting generally adopts the relief plate with higher precision and high cost, and the problems of air bubbles, tingling and the like are also often generated during thermoprinting. In addition, the existing positioning hot stamping aluminum is single-color, is very abrupt compared with the whole package design, and cannot be well fused with the existing package color.
There is thus a need for improvements and improvements in the art.
Disclosure of Invention
In view of the shortcomings of the prior art, the invention aims to provide the micro-nano structure anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil, and production equipment and method thereof, which can provide thermoprinting quality.
In order to solve the technical problems, the invention adopts the following technical scheme:
a production facility for preparing micro-nano structure anti-fake fretwork color picture and text holographic thermoprinting foil, which includes:
unreeling means for providing a base film;
the satellite printing device is used for coating a release layer on the base film in a full-screen mode and mirror-printing a color image-text printing layer on the release layer;
the coating and calendaring device is used for coating the EVA coating layer on the color image-text printing layer, enabling the EVA coating layer to be in a semi-molten state and calendaring the EVA coating layer; the EVA coating layer comprises: 30% of modified epoxy acrylic resin, 25% of 1, 6-hexanediol diacrylate, 5% of trimethylolpropane triacrylate, 0.9% of organosilicon leveling agent, 5% of 2-phenylbenzyl-2-dimethylamine-1- (4-morpholinophenyl) butanone, 10% of mixed diluent, 15% of EVA polyvinyl acetate, 5% of glycerol, 0.7% of triethanolamine and 3.4% of deionized water, wherein the obtained EVA coating layer is in a semi-molten state at 120 ℃;
the hot roller molding device is used for molding the EVA coating layer in a semi-molten state to form a micro-nano structure molding holographic image-text layer; the temperature of a hot roller of the hot roller molding device is 120-140 ℃;
the first evaporation device is used for vacuum evaporation of a zinc sulfide layer on the micro-nano structure mould pressing holographic image-text layer;
the first coating device is used for coating a hydrophilic oil layer on the zinc sulfide layer according to the hollowed-out graphics and texts;
the second evaporation device is used for vacuum evaporation of a metal layer on the hydrophilic oil layer;
the off-line cleaning device is used for cleaning the hydrophilic oil layer to strip part of the metal layer to form hollowed-out graphics and texts;
the anti-counterfeiting processing device is used for arranging a hidden image-text layer on the metal layer and uploading anti-counterfeiting information of the hidden image-text layer;
the second coating device is used for coating an adhesive layer on the cleaned metal layer to prepare the micro-nano structure anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil;
the winding device is used for winding the micro-nano structure anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil.
As an improvement of the present invention, the production apparatus further comprises a plasma surface treatment device for performing plasma surface treatment on the base film to improve the adhesion of the surface of the base film.
And a deviation correcting device is arranged between the unreeling device and the plasma surface treatment device, between the plasma surface treatment device and the satellite printing device, between the satellite printing device and the first coating device, between the calendaring device and the hot roller molding device, and between the hot roller molding device and the second coating device.
As an improvement of the present invention, the anti-counterfeit processing device includes:
a coating unit for coating the metal layer with the isolation layer;
an anti-counterfeiting code printing unit for printing an anti-counterfeiting code on the isolation layer;
and the anti-counterfeiting code acquisition and uploading unit is used for acquiring anti-counterfeiting code information and uploading the anti-counterfeiting code information to the anti-counterfeiting verification platform.
A method for preparing micro-nano structured anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil by production equipment comprises the following steps:
coating a release layer on the base film;
mirror-printing a color image-text printing layer on the release layer;
coating an EVA coating layer on the color graphic printing layer;
the EVA coating layer is in a semi-molten state, and the EVA coating layer is calendered; the EVA coating layer comprises: 30% of modified epoxy acrylic resin, 25% of 1, 6-hexanediol diacrylate, 5% of trimethylolpropane triacrylate, 0.9% of organosilicon leveling agent, 5% of 2-phenylbenzyl-2-dimethylamine-1- (4-morpholinophenyl) butanone, 10% of mixed diluent, 15% of EVA polyvinyl acetate, 5% of glycerol, 0.7% of triethanolamine and 3.4% of deionized water, wherein the obtained EVA coating layer is in a semi-molten state at 120 ℃;
forming a micro-nano structure mould pressing holographic image-text layer by adopting the EVA coating layer which is subjected to mould pressing and calendaring by a hot roller; the temperature of a hot roller of the hot roller molding device is 120-140 ℃;
vacuum evaporating zinc sulfide layer on the micro-nano structure mould pressing holographic graph-text layer;
coating a hydrophilic oil layer on the zinc sulfide layer according to the hollowed-out graphics and texts;
vacuum evaporating a metal layer on the hydrophilic oil layer;
cleaning the hydrophilic oil layer to strip part of the metal layer to form hollowed-out graphics and texts;
a hidden image-text layer is arranged on the metal layer, and anti-counterfeiting information of the hidden image-text layer is uploaded;
and coating an adhesive layer on the cleaned metal layer to prepare the micro-nano structure anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil.
As an improvement of the present invention, before the step of full-plate coating the release layer on the base film, the method further comprises: and (3) performing plasma surface treatment on the base film to improve the adhesive force of the surface of the base film.
As a further improvement of the invention, the steps of arranging the hidden image-text layer on the metal layer and uploading the anti-counterfeiting information of the hidden image-text layer comprise the following steps:
coating an isolating layer on the metal layer;
printing an anti-counterfeiting code on the isolation layer;
and acquiring anti-counterfeiting code information and uploading the anti-counterfeiting code information to an anti-counterfeiting verification platform.
The micro-nano structure anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil prepared by production equipment comprises the following components: the anti-fake adhesive comprises a strippable base film, a release layer, a color image-text printing layer, a micro-nano structure mould pressing holographic image-text layer, a zinc sulfide layer, a metal layer, an anti-fake information layer and an adhesive layer which are sequentially laminated, wherein the metal layer is provided with a plurality of hollowed-out parts, and the adhesive layer is covered on the metal layer.
Compared with the prior art, the micro-nano structure anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil and production equipment and method provided by the invention adopt a mode of printing before scalding, so that thermoprinting quality is improved, the combination of holographic film pressing effect of various photoetching micro-nano structures, color image-text and anti-counterfeiting information can be realized through a color image-text hollowed-out holographic positioning thermoprinting technology, transparent zinc sulfide and aluminum plating can be combined, various effects of metal and photoetching micro-nano structures are realized, base paper or printing background color can be leaked out in a hollowed-out mode, the thermoprinting foil is covered with a hidden image-text layer through a metal layer, a consumer can scratch the metal layer after buying a product, leak the hidden image-text layer for verification, the anti-counterfeiting traceability function of the product is increased, the product expression diversity is increased, and the technical blank of the anti-counterfeiting and micro-nano structure color image-text holographic thermoprinting foil is made up.
Drawings
Fig. 1 is a flowchart of a preparation method of the micro-nano structured anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil.
Fig. 2 is a schematic process diagram of a preparation method of the micro-nano structured anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil.
Fig. 3 is a schematic diagram of a printing plate in the preparation method of the micro-nano structured anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil.
Fig. 4 is a schematic diagram of a production device for preparing the micro-nano structured anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil.
Fig. 5 is a schematic structural diagram of the micro-nano structured anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil provided by the invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It is noted that when an element is referred to as being "mounted," "secured," or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.
It should be noted that, in the embodiments of the present invention, terms such as left, right, up, and down are merely relative concepts or references to normal use states of the product, and should not be construed as limiting.
The invention provides a preparation method of a micro-nano structure anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil, which is a positioning thermoprinting technology of multi-layer medium hollowed-out color image-text with micro-nano structure anti-counterfeiting function, and comprises a color printing image-text layer, a micro-nano structure photoetching information layer, a transparent zinc sulfide layer, a hollowed-out aluminum plating layer, an anti-counterfeiting image-text layer and the like, wherein the hollowed-out aluminum plating layer, the anti-counterfeiting image-text layer and the like can be designed according to requirements, the thermoprinting foil is printed with the color image-text, the existing thermoprinting technology can be replaced by the prior thermoprinting technology, the micro-nano structure anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil is directly transferred onto paper in a hot stamping mode, the primary printing technology is reduced, the thermoprinting plate is only required to be a plane plate with a positioning thermoprinting area, the plate is not required to be registered, the electric eye is required to identify and position the thermoprinting foil to be registered with a cursor, the efficiency is greatly improved, the processing cost is reduced, the processing difficulty of a subsequent procedure is also improved, and the product quality is improved.
Referring to fig. 1 and 2, the preparation method of the micro-nano structured anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil provided by the invention comprises the following steps:
s1, coating a release layer on a base film in a full-plate manner;
s2, mirror-printing a color image-text printing layer on the release layer;
s3, coating an EVA coating layer on the color image-text printing layer;
s4, enabling the EVA coating layer to be in a semi-molten state, and calendaring the EVA coating layer;
s5, forming a micro-nano structure die-pressed holographic image-text layer by adopting the EVA coating layer which is die-pressed and polished by the hot roller;
s6, vacuum evaporating a zinc sulfide layer on the micro-nano structure mould pressing holographic image-text layer;
s7, coating a hydrophilic oil layer on the zinc sulfide layer according to the hollowed-out graphics and texts;
s8, vacuum evaporating a metal layer on the hydrophilic oil layer;
s9, cleaning the hydrophilic oil layer to strip part of the metal layer to form hollowed-out graphics and texts;
s10, arranging a hidden image-text layer on the metal layer, and uploading anti-counterfeiting information of the hidden image-text layer;
s11, coating an adhesive layer on the cleaned metal layer to prepare the micro-nano structure anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil.
The method of stamping before stamping improves the stamping quality, can realize the combination of various photoetching micro-nano structure film pressing holographic effects, color graphics context and anti-counterfeiting information through color hollowed-out positioning stamping, can combine transparent zinc sulfide with aluminum plating, realize various effects of metal and photoetching, can leak base paper or printing background color in a hollowed-out mode, and can cover a hidden graphics context layer through the metal layer, so that a consumer can scrape the metal layer after buying a product to leak the hidden graphics context layer for verification, thereby increasing the anti-counterfeiting traceability function of the product, increasing the appearance diversity of the product, and making up the technical blank of the anti-counterfeiting micro-nano structure color graphics context holographic stamping foil.
Before step S1, the method further includes S0, performing a plasma surface treatment on the base film, so as to improve the adhesion of the surface of the base film.
Preferably, in the present invention, when preparing the stamping foil, a pre-printing process is required, please refer to fig. 3, the positioning stamping image and text is first assembled before printing, the positioning stamping registration cursor 10, the positioning stamping, film pressing, coating registration cross mark 20, the positioning stamping, film pressing, coating registration gauge line 30, the positioning stamping, film pressing, coating registration color mark 40 are added on the printing plate, so as to facilitate the positioning of the procedures of coating, molding, aluminum washing, gluing, etc.
In a specific embodiment, the base film is a PET (polyethylene terephthalate) film, and in step S0, the surface of the PET base film is chemically grafted by using a plasma treatment technology, so as to improve the adhesion of the surface of the base film. When the plasma treatment is carried out, 220V stable voltage is adopted to avoid breakdown, compressed oxygen not lower than 0.1MPa is used, and the plasma gun head is 5mm away from the surface of the film, so that the surface tension of the base film after the plasma treatment is more than or equal to 48N.
In the step S1, the release layer is silicone oil, which is formed by mixing paraffin, oleic acid, triethanolamine, deionized water and TX-10 emulsifying agent, and is coated by a coating-4 cup, wherein the coating viscosity is 45+/-2S, the coating adhesive force is less than or equal to 1 level, and the surface tension of the base film is less than or equal to 38N.
Preferably, the release layer is formed by mixing 20% of paraffin, 0.6% of oleic acid, 4% of triethanolamine, 70% of deionized water and 5.4% of TX-10 emulsifier.
In step S2, a satellite printing device is adopted to carry out reverse printing (namely mirror image printing) when a color image-text printing layer is printed, four-color and special-color multicolor printing can be realized through the satellite printing device, so that images and texts with various colors are arranged on a base film, the tension of the base film can be effectively controlled by adopting a satellite unit, the base film is prevented from being excessively stretched, each group of color groups can be used for carrying out registration during printing, high-precision registration is realized, the registration precision is improved, the registration precision can be within 0.1mm, and the tension can be controlled so that the deformation of the film is less than 0.5%. After printing, the adhesive force between the printing layer and the release layer is less than or equal to 1 grade, and the surface tension of the ink is more than or equal to 48N.
In step S3, when the EVA coating layer (i.e. polyvinyl acetate) is coated, the anilox roller 8 (as shown in fig. 4) may be used to coat EVA coating with a thickness of 5 μm or more, and after coating, the EVA coating layer is naturally leveled and then cured by UV lamp, so that the adhesion between the EVA coating layer and the printing layer is 1 level or less and the surface tension is 48N or more.
Wherein, the EVA coating layer includes: 30% of modified epoxy acrylic resin, 25% of 1.6-hexanediol diacrylate, 5% of trimethylolpropane triacrylate, 0.9% of organosilicon leveling agent, 5% of 2-phenylbenzyl-2-dimethyl amine-1- (4-morpholinophenyl) butanone (namely photoinitiator 369), 10% of mixed diluent, 15% of EVA polyvinyl acetate, 5% of glycerol, 0.7% of triethanolamine and 3.4% of deionized water, wherein the obtained EVA coating layer is in a semi-molten state at 120 ℃, and the micro-nano structure molded holographic image-text layer capable of being cooled at normal temperature can be obtained.
In step S4, the EVA coating layer is left in a semi-molten state to facilitate the subsequent post-lamination curing, and after being applied, is flattened by a calender roll to ensure the lamination accuracy.
In step S5, the temperature of the hot roller is 100-140 ℃, preferably, the EVA coating layer is formed into the micro-nano structure molded holographic image-text layer by the mold pressing of the hot roller 9 at 120 ℃. The invention adopts a hot roller molding process to finish the stereoscopic effect image for anti-counterfeiting, and can also adopt grating molding to form images and texts with depth visual effect, thereby improving the packaging grade.
Besides film press graphics context, the surface of the film press plate (namely the surface of the hot roller) is also provided with a registration cross mark, and the registration is carried out with a printing cross mark in the film press process, so that the die pressing precision is ensured. Before the mould pressing, the color image-text printing layer is printed below the mould pressing holographic image-text layer of the micro-nano structure.
Thus between step S5 and step S6, the method further comprises: the micro-nano structure mould pressing holographic image-text layer is cooled by the cooling roller 11, and then the micro-nano structure mould pressing holographic image-text layer is solidified.
After the micro-nano structure mould pressing holographic image-text layer is cooled by the cooling roller, the mould pressing holographic image-text layer can be rolled firstly and then transferred to a true plating workshop to finish the step S6, in the step S6, the rolled color holographic thermoprinting foil with the mould pressing holographic image-text layer with the micro-nano structure is put into a full-plate plating zinc sulfide layer of a vapor plating bin, and the zinc sulfide plating layer is a transparent layer, so that transparent photoetching image-text is presented after aluminum washing is carried out subsequently, and the mould pressing holographic image-text layer is rolled after vapor plating is finished.
In step S7, the coating roller is required to be coated with the graphic according to the hollowed-out graphic design, so that the hydrophilic ink is printed at the position where the base film needs to be cleaned, and the coating plate is hollowed-out at the position where the base film does not need to be cleaned (i.e. the metal layer needs to be protected). In this embodiment, the adhesion force between the hydrophilic ink and the molding glue is less than or equal to 1 level, 13% polar resin is added in the hydrophilic ink to increase the adhesion fastness of the vapor deposition layer, and a registration cross line is designed on the coated printing plate to be registered with the film pressing and printing cross line, and then the coated printing plate is thermally cured, at this time, the coated printing plate can be rolled up and sent into a true plating workshop to be unrolled for vapor deposition, so that the registration accuracy is prevented from being influenced by the stretching of the base film, and the true plating can be directly performed without rolling up, so that the efficiency is improved.
In step S7, the hydrophilic ink may be rolled up, transferred to a vacuum plating workshop to complete vapor deposition of the metal layer, and rolled up after the second vapor deposition is completed to enter the next process. The metal layer is preferably an aluminum layer so that it can exhibit a good metal effect. In vacuum evaporation, an aluminum layer or other metal medium layer with purity higher than 99.99% is adopted, the true plating thickness is 400 angstroms, and the pressure of vacuum degree is not lower than 10 < -3 > pa.
And then off-line washing aluminum by clean water, wherein the part coated with the hydrophilic ink is dissolved in water, the aluminum layer in the area is stripped, and the part of the aluminum layer which is not coated with the hydrophilic ink is remained on the substrate, so that the aluminum washing precision can reach more than 0.1mm according to the printing position precision. And the aluminum can be recovered and purified in the aluminum washing solution through an extraction and recovery process, so that the direct discharge of the aluminum is avoided, the aluminum can be recycled, and the cost is saved.
In step S10, a hidden graphic layer is added on the aluminum layer, so that the holographic thermoprinting foil further has an anti-counterfeiting function, and specifically, the step S10 includes:
s101, coating an isolation layer on a metal layer;
s102, printing an anti-counterfeiting code on the isolation layer;
s103, acquiring anti-counterfeiting code information and uploading the anti-counterfeiting code information to an anti-counterfeiting verification platform.
The step S101 is used for coating the isolating layer on the aluminum layer corresponding to the hidden graphics context position, so that the aluminum layer has smaller adhesive force on the hidden graphics context and is easy to scratch for verification, and the step 102 can perform graphics context mirror image spray printing (i.e. reverse spray printing) on the isolating layer position, wherein the spray printing content includes but is not limited to two-dimensional codes, digital verification codes, characters, graphics context and the like. Of course, a positioning printing manner may be adopted, which is not limited by the present invention.
In S103, the obtained anti-counterfeiting code information includes two-dimensional codes, digital verification codes, characters, patterns, etc., that is, anti-counterfeiting information printed or printed on the isolation layer. Preferably, the step S103 further includes: the outline of the hollowed-out area is shot by adopting a high-definition camera, the outline is bound with the anti-counterfeiting code information (namely, two-dimensional code spraying, digital verification code spraying and the like) to form unique information, the bound information is uploaded to an anti-counterfeiting verification platform for storage, an aluminum layer is scraped during verification, the two-dimensional code, the digital verification code, characters, patterns and the like are input into the platform, and the corresponding outline in a database is called to be compared with the actual outline, so that the verification purpose is achieved. The invention further increases the anti-counterfeiting safety performance by utilizing the characteristic that the outline of the hollowed-out area is convenient to identify and combining the mode of binding anti-counterfeiting code information, and avoids the situation that the anti-counterfeiting code cannot be truly anti-counterfeiting by being stolen.
And finally, coating fusible thermoplastic resin on the aluminum layer through the step S10, and drying to obtain the adhesive layer, wherein the adhesive force between the adhesive layer and the aluminum layer is less than or equal to 1 level, the adhesive layer is coated in a positioning mode, and the aluminum layer must be covered by the coating area, so that the edge of the adhesive layer is larger than the metal layer. Preferably, the edge of the adhesive layer exceeds the metal layer by 1-5mm (such as 1-2 mm), so that the integrity of gold stamping transfer is ensured, and finally the adhesive layer is rolled.
According to the invention, the mode that the edge of the adhesive layer exceeds the metal layer is adopted, and the transparent photoetching image-text plated with the zinc sulfide layer can be exposed according to different hollowed-out positions, and also the bottom paper or the printing bottom color can be exposed due to aluminized hollowed-out, so that various effects are presented, the aluminum layer can be scraped off during product verification, the hidden image-text can be penetrated out, and the background verification can be completed through code scanning.
When in gold stamping, the stamping process is directly carried out, and when the stamping product is packaged, the color printing process is reduced, and the problem that the metal foil is pulled out due to the viscosity of the printing ink in the process of stamping before stamping is avoided.
The invention also provides a production device for preparing the micro-nano structured anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil, referring to fig. 4, which comprises:
an unreeling device 1 for providing a base film;
the satellite printing device 3 is used for coating a release layer on the base film in a full-screen mode and mirror-printing a color image-text printing layer on the release layer;
the coating and calendaring device 4 is used for coating the EVA coating layer on the colorful graphic printing layer, enabling the EVA coating layer to be in a semi-molten state and calendaring the EVA coating layer;
the hot roller molding device 5 is used for molding the EVA coating layer in a semi-molten state to form a micro-nano structure molding holographic image-text layer;
a first vapor deposition device (not shown in the figure) for vacuum vapor deposition of a zinc sulfide layer on the micro-nano structure molding holographic image-text layer;
a first coating device (not shown in the figure) for coating a hydrophilic oil layer on the zinc sulfide layer according to the hollowed-out graphics and texts;
a second vapor deposition device (not shown) for vacuum vapor deposition of a metal layer on the hydrophilic oil layer;
the off-line cleaning device is used for cleaning the hydrophilic oil layer to strip part of the metal layer to form hollowed-out graphics and texts;
an anti-counterfeiting processing device (not shown in the figure) is used for arranging a hidden image-text layer on the metal layer and uploading anti-counterfeiting information of the hidden image-text layer;
the second coating device is used for coating an adhesive layer on the cleaned metal layer to prepare the micro-nano structure anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil;
the winding device is used for winding the micro-nano structure anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil.
Unreeling device and coiling mechanism include a plurality of unreeling roller and wind-up roll, adopt the rolling mode to carry out off-line operation at coating by vaporization, coating clear oil, aluminium washing, coating isolation layer etc. to unreel, avoid thermoprinting foil to excessively stretch, improve the overprinting precision.
Further, the production equipment also comprises a plasma surface treatment device 2 for carrying out plasma surface treatment on the base film and improving the adhesive force of the surface of the base film.
In order to improve printing precision, in the production equipment of the invention, a deviation correcting device 7 is arranged between the unreeling device and the plasma surface treatment device, between the plasma surface treatment device and the satellite printing device, between the satellite printing device and the first coating device, between the calendaring device and the hot roller molding device, and between the hot roller molding device and the second coating device.
The coating and calendaring device 4 comprises an EVA coating unit 8 and a calendaring unit (shown as a reference numeral in the figure) for coating calendaring, and the hot roll molding device 5 comprises a hot roll molding unit 9 for hot roll molding and is cooled by a cooling roll 11.
The invention also provides a micro-nano structure anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil, referring to fig. 5, which comprises: the base film 101, the release layer 102, the color image-text printing layer 103, the micro-nano structure mould pressing holographic image-text layer 104, the zinc sulfide layer 105, the metal layer 106, the anti-fake information layer 107 and the adhesive layer 108 which are sequentially laminated, wherein the metal layer is provided with a plurality of hollowed-out parts, the metal layer can be enabled to penetrate out the base color of a printed matter (such as paper), the adhesive layer covers the metal layer, the micro-nano structure anti-fake hollowed-out color image-text holographic thermoprinting foil is directly transferred onto the printed matter through a gold stamping process during thermoprinting, and the printed matter with color, metallic luster, depth or three-dimensional effect can be presented by tearing the PET film on the upper layer.
In this embodiment, the anti-counterfeit information layer 107 includes an isolation layer 1071 and a hidden graphic layer 1072, where the isolation layer 1071 is disposed on the metal layer 106, so that the aluminum layer is convenient to be scraped when verifying the anti-counterfeit information.
In summary, the micro-nano structure anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil can replace a thermoprinting process, one-time printing process is reduced, thermoprinting plates only need to be plane plates larger than a positioning thermoprinting area, product plates with small area difference can be shared, the plates do not need to be registered with printed matters, when thermoprinting is carried out, only electric eyes are needed to identify and position the thermoprinting foil to register a cursor for registering, so that the efficiency is greatly improved, meanwhile, the processing cost is reduced, the processing difficulty of a post-process is reduced, and meanwhile, the product quality is also improved. The invention can realize the combination effect of various photoetching micro-nano structure film pressure holographic effects and color graphics context by color hollowed-out positioning ironing, and the hollowed-out process can leak base paper or printing background color, thereby increasing the diversity of product expression and making up the technical blank of anti-counterfeiting micro-nano structure color graphics context holographic thermoprinting foil.
It will be understood that equivalents and modifications will occur to those skilled in the art in light of the present invention and their spirit, and all such modifications and substitutions are intended to be included within the scope of the present invention as defined in the following claims.
Claims (9)
1. The production equipment for the micro-nano structure anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil is characterized by comprising the following components:
unreeling means for providing a base film;
the satellite printing device is used for coating a release layer on the base film in a full-screen mode and mirror-printing a color image-text printing layer on the release layer;
the coating and calendaring device is used for coating the EVA coating layer on the color image-text printing layer, enabling the EVA coating layer to be in a semi-molten state and calendaring the EVA coating layer; the EVA coating layer comprises: 30% of modified epoxy acrylic resin, 25% of 1, 6-hexanediol diacrylate, 5% of trimethylolpropane triacrylate, 0.9% of organosilicon leveling agent, 5% of 2-phenylbenzyl-2-dimethylamine-1- (4-morpholinophenyl) butanone, 10% of mixed diluent, 15% of EVA polyvinyl acetate, 5% of glycerol, 0.7% of triethanolamine and 3.4% of deionized water, wherein the obtained EVA coating layer is in a semi-molten state at 120 ℃;
the hot roller molding device is used for molding the EVA coating layer in a semi-molten state to form a micro-nano structure molding holographic image-text layer; the temperature of a hot roller of the hot roller molding device is 120-140 ℃;
the first evaporation device is used for vacuum evaporation of a zinc sulfide layer on the micro-nano structure mould pressing holographic image-text layer;
the first coating device is used for coating a hydrophilic oil layer on the zinc sulfide layer according to the hollowed-out graphics and texts;
the second evaporation device is used for vacuum evaporation of a metal layer on the hydrophilic oil layer;
the off-line cleaning device is used for cleaning the hydrophilic oil layer to strip part of the metal layer to form hollowed-out graphics and texts;
the anti-counterfeiting processing device is used for arranging a hidden image-text layer on the metal layer and uploading anti-counterfeiting information of the hidden image-text layer;
the second coating device is used for coating an adhesive layer on the cleaned metal layer to prepare the micro-nano structure anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil;
the winding device is used for winding the micro-nano structure anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil.
2. The production apparatus according to claim 1, further comprising a plasma surface treatment means for performing plasma surface treatment on the base film to improve adhesion of the surface of the base film.
3. The production apparatus according to claim 2, wherein deviation correcting means are provided between the unreeling means and the plasma surface treating means, between the plasma surface treating means and the satellite printing means, between the satellite printing means and the first coating means, between the calender means and the hot roll molding means, and between the hot roll molding means and the second coating means.
4. The production apparatus according to claim 1, wherein the anti-counterfeit processing means comprises:
a coating unit for coating the metal layer with the isolation layer;
an anti-counterfeiting code printing unit for printing an anti-counterfeiting code on the isolation layer;
and the anti-counterfeiting code acquisition and uploading unit is used for acquiring anti-counterfeiting code information and uploading the anti-counterfeiting code information to the anti-counterfeiting verification platform.
5. A method for preparing micro-nano structured anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil according to any one of the claims 1-4, comprising the steps of:
coating a release layer on the base film;
mirror-printing a color image-text printing layer on the release layer;
coating an EVA coating layer on the color graphic printing layer;
the EVA coating layer is in a semi-molten state, and the EVA coating layer is calendered; the EVA coating layer comprises: 30% of modified epoxy acrylic resin, 25% of 1, 6-hexanediol diacrylate, 5% of trimethylolpropane triacrylate, 0.9% of organosilicon leveling agent, 5% of 2-phenylbenzyl-2-dimethylamine-1- (4-morpholinophenyl) butanone, 10% of mixed diluent, 15% of EVA polyvinyl acetate, 5% of glycerol, 0.7% of triethanolamine and 3.4% of deionized water, wherein the obtained EVA coating layer is in a semi-molten state at 120 ℃;
forming a micro-nano structure mould pressing holographic image-text layer by adopting the EVA coating layer which is subjected to mould pressing and calendaring by a hot roller; the temperature of a hot roller of the hot roller molding device is 120-140 ℃;
vacuum evaporating zinc sulfide layer on the micro-nano structure mould pressing holographic graph-text layer;
coating a hydrophilic oil layer on the zinc sulfide layer according to the hollowed-out graphics and texts;
vacuum evaporating a metal layer on the hydrophilic oil layer;
cleaning the hydrophilic oil layer to strip part of the metal layer to form hollowed-out graphics and texts;
a hidden image-text layer is arranged on the metal layer, and anti-counterfeiting information of the hidden image-text layer is uploaded;
and coating an adhesive layer on the cleaned metal layer to prepare the micro-nano structure anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil.
6. The method of claim 5, further comprising, prior to the step of flood coating the release layer on the base film:
and (3) performing plasma surface treatment on the base film to improve the adhesive force of the surface of the base film.
7. The method of claim 5, wherein the steps of providing a hidden graphic layer on the metal layer and uploading the security information of the hidden graphic layer include:
coating an isolating layer on the metal layer;
printing an anti-counterfeiting code on the isolation layer;
and acquiring anti-counterfeiting code information and uploading the anti-counterfeiting code information to an anti-counterfeiting verification platform.
8. The method of claim 5, wherein after the step of forming the micro-nano structure embossed holographic pattern layer by embossing the calendered EVA coating layer with the hot roller, the step of coating the hydrophilic oil layer on the zinc sulfide layer according to the hollowed pattern further comprises:
and cooling the micro-nano structure mould pressing holographic graph-text layer.
9. A micro-nano structured anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil prepared by adopting the production equipment as claimed in any one of claims 1 to 4, which is characterized by comprising: the anti-fake adhesive comprises a strippable base film, a release layer, a color image-text printing layer, a micro-nano structure mould pressing holographic image-text layer, a zinc sulfide layer, a metal layer, an anti-fake information layer and an adhesive layer which are sequentially laminated, wherein the metal layer is provided with a plurality of hollowed-out parts, and the adhesive layer is covered on the metal layer.
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| CN115074036B (en) * | 2022-07-11 | 2023-09-19 | 扬州市祥华新材料科技有限公司 | Temperature-sensitive color-changing alumite hot stamping back adhesive and preparation method thereof |
| CN116141844A (en) * | 2023-03-13 | 2023-05-23 | 湖南泰利恒友科技开发有限公司 | Integrated multi-color positioning concentric lens thermoprinting film and manufacturing method thereof |
| CN116691204B (en) * | 2023-05-17 | 2024-03-08 | 佛山市龙源镭射科技有限公司 | Preparation method of cold stamping foil |
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| JP2001039068A (en) * | 1999-08-02 | 2001-02-13 | Imai Sanseido:Kk | Scratch card |
| CN202062842U (en) * | 2011-03-10 | 2011-12-07 | 深圳市东鹏印刷厂 | Anti-counterfeiting ticket |
| CN202126797U (en) * | 2011-05-10 | 2012-01-25 | 山东泰宝防伪技术产品有限公司 | Disposable digital anti-counterfeit label relevant to English alphabets |
| CN203923799U (en) * | 2014-04-18 | 2014-11-05 | 上海紫江喷铝环保材料有限公司 | A kind of local composite transferring holographic false proof paper |
| CN205767829U (en) * | 2016-05-20 | 2016-12-07 | 山东泰宝防伪制品有限公司 | Holographic scraped information tracing anti-counterfeit package box |
| CN206217412U (en) * | 2016-12-05 | 2017-06-06 | 武汉华工图像技术开发有限公司 | It is a kind of to position double-colored laser holographic thermoprinted film |
| CN111806072B (en) * | 2020-06-03 | 2024-05-07 | 深圳劲嘉集团股份有限公司 | Micro-nano structure printing equipment, printing method and printed matter |
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