阅读说明：本技术 微纳结构防伪镂空彩色图文全息烫印箔及生产设备和方法 (Micro-nano structure anti-counterfeiting hollowed-out color image-text holographic hot stamping foil and production equipment and method ) 是由 李静 史太川 张国华 吕伟 于 2021-09-10 设计创作，主要内容包括：本发明公开了一种微纳结构防伪镂空彩色图文全息烫印箔及生产设备和方法。其中,所述方法包括在基膜上满版涂布离型层；在离型层上镜像印刷彩色图文印刷层,并在其上涂布EVA涂料层；使EVA涂料层处于半融状态,并压光处理；之后采用热辊模压形成微纳结构模压全息图文层；再在全息图文层上真空蒸镀硫化锌层,之后涂布亲水性油层；在亲水性油层上真空蒸镀金属层；清洗亲水性油层使部分金属层剥离形成镂空图文；在金属层上设置隐藏图文层,并上传隐藏图文层的防伪信息,最后涂布胶粘层制成微纳结构防伪镂空彩色图文全息烫印箔。本发明采用先印后烫的方式,提高了烫印质量,实现了多种微纳结构光刻膜压效果、彩色图文及防伪的结合,增加产品表现多样性。(The invention discloses a micro-nano structure anti-counterfeiting hollowed color image-text holographic hot stamping foil and production equipment and a method. Wherein, the method comprises the steps of coating a release layer on the base film in a full-page manner; printing a color image-text printing layer on the release layer in a mirror image manner, and coating an EVA coating layer on the release layer; making the EVA coating layer in a semi-molten state and performing press polishing treatment; then, forming a micro-nano structure die pressing holographic image-text layer by adopting hot roller die pressing; vacuum evaporating a zinc sulfide layer on the holographic image-text layer, and then coating a 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 hollow-out pictures 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 color image-text holographic hot stamping foil. The invention adopts a mode of printing first and then stamping, improves the hot stamping quality, realizes the combination of photoetching film pressing effect, color image-text and anti-counterfeiting of various micro-nano structures, and increases the product expression diversity.)

1. A production facility that is used for holographic thermoprinting of anti-fake fretwork colour picture and text of micro-nano structure, its characterized in that includes:

the unwinding device is used for providing a base film;

the satellite type printing device is used for coating a release layer on the base film in a full-page manner and printing a color image-text printing layer on the release layer in a mirror image manner;

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 hot roller die pressing device is used for forming a micro-nano structure die pressing holographic image-text layer by die pressing the EVA coating layer in a semi-molten state;

the first evaporation device is used for carrying out vacuum evaporation on the micro-nano structure mould pressing holographic image-text layer to form a zinc sulfide layer;

the first coating device is used for coating a hydrophilic oil layer on the zinc sulfide layer according to the hollow pictures and texts;

the second evaporation device is used for evaporating the metal layer on the hydrophilic oil layer in vacuum;

the off-line cleaning device is used for cleaning the hydrophilic oil layer to strip part of the metal layer to form hollow-out pictures and texts;

the anti-counterfeiting processing device is used for arranging the 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 color image-text holographic hot stamping foil;

and the winding device is used for winding the micro-nano structure anti-counterfeiting hollowed color image-text holographic hot stamping foil.

2. The production apparatus according to claim 1, further comprising a plasma surface treatment device for performing a plasma surface treatment on the base film to improve adhesion of the base film surface.

3. The production apparatus as claimed in claim 2, wherein deviation correcting means are provided between the unwinding means and the plasma surface treatment means, between the plasma surface treatment means and the satellite printing means, between the satellite printing means and the first coating means, between the calendering means and the hot roll molding means, and between the hot roll molding means and the second coating means.

4. The production facility according to claim 1, wherein the anti-counterfeit processing device comprises:

the coating unit is used for coating the metal layer with the isolation layer;

the anti-counterfeiting code printing unit is used for printing anti-counterfeiting codes 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. The method for preparing the micro-nano structure anti-counterfeiting hollowed-out color image-text holographic hot stamping foil by using the production equipment as claimed in any one of claims 1 to 4 is characterized by comprising the following steps of:

coating a release layer on the base film in a full-page manner;

printing a color image-text printing layer on the release layer in a mirror image manner;

coating an EVA coating layer on the color image-text printing layer;

making the EVA coating layer in a semi-molten state and press polishing the EVA coating layer;

forming a micro-nano structure die pressing holographic image-text layer by adopting the EVA coating layer subjected to hot roller die pressing and calendaring;

vacuum evaporating a zinc sulfide layer on the micro-nano structure die pressing holographic image-text layer;

coating a hydrophilic oil layer on the zinc sulfide layer according to the hollow-out pictures 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 hollow-out pictures and texts;

arranging a hidden image-text layer on the metal layer, and uploading anti-counterfeiting information of the hidden image-text layer;

and coating an adhesive layer on the cleaned metal layer to prepare the micro-nano structure anti-counterfeiting hollowed color image-text holographic hot stamping foil.

6. The method according to claim 5, further comprising, before the step of blanket coating a release layer on the base film:

and carrying out 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 EVA coating layer comprises: 30% of modified epoxy acrylic resin, 25% of 1.6-hexanediol diacrylate, 5% of trimethylolpropane triacrylate, 0.9% of an organic silicon leveling agent, 5% of 2-benzyl-2-dimethylamine-1- (4-morpholine benzyl phenyl) butanone, 10% of a mixed diluent, 15% of EVA polyvinyl acetate, 5% of glycerol, 0.7% of triethanolamine and 3.4% of deionized water.

8. The method of claim 5, wherein the step of providing the hidden graphic layer on the metal layer and uploading the anti-counterfeiting information of the hidden graphic layer comprises:

coating an isolation 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.

9. The method as claimed in claim 5, wherein the step of forming the micro-nano structure die-pressed holographic image-text layer by using the EVA coating layer calendered by hot roller die pressing and the step of coating the hydrophilic oil layer on the zinc sulfide layer according to the hollowed-out image-text further comprise the following steps:

and cooling the micro-nano structure die pressing holographic image-text layer.

10. The micro-nano structure anti-counterfeiting hollow-out color image-text holographic hot stamping foil prepared by the production equipment of any one of claims 1 to 4 is characterized by comprising the following steps: the base film that stacks gradually the strippable of setting, from type layer, colored picture and text printing layer, receive nano-structure mould pressing holographic picture and text layer, zinc sulfide layer, metal level, anti-fake information layer and adhesive layer in proper order, the metal level has a plurality of fretworks portion, the adhesive layer covers on the metal level.

Technical Field

The invention relates to the technical field of printing, in particular to a micro-nano structure anti-counterfeiting hollowed color image-text holographic hot stamping foil and production equipment and method.

Background

With the improvement of the product packaging printing technology, the gold stamping process is widely applied to the field of packaging printing. At present, the application of the prior hot stamping and printing process in cigarette label packaging is very wide, but the process difficulty is very high, and the reasons mainly comprise that: firstly, the hot stamping-after-printing process has high requirements on the flatness of paper because the electrochemical aluminum needs to be directly hot stamped on the paper, otherwise, the problem of poor transfer can occur; secondly, the bonding strength between the alumite and the paper surface is required to be high, so that the requirement on the quality stability of the alumite is high, the peeling force of the alumite is required to be kept constant, if the viscosity of glue between the paper and the hot stamping foil is not enough or not stable enough, the hot stamping foil is very easily pulled reversely due to the influence of the viscosity of ink in the secondary overprinting process, and a blanket stacking phenomenon is formed, so that the production efficiency and the product quality are seriously influenced. Thirdly, in order to ensure that the hot stamping pressure is enough, the requirements of the hot stamping and post-printing process on the hot stamping equipment are that a hot stamping machine with circular pressing and circular pressing is preferentially selected, and then a hot stamping machine with flat pressing is selected. The conventional rotary gilding press is difficult to adjust pressure and is easy to generate the risk of product quality problems caused by uneven pressure. Fourthly, the existing hot stamping foil only has mould pressing aluminizing or zinc sulfide plating effects, the effect is single, and the hot stamping pattern does not have an anti-counterfeiting function or only has the anti-counterfeiting function but does not have color pictures and texts in general;

meanwhile, the positioning stamping process can be applied to printed products with anti-counterfeiting pictures and texts to improve the anti-counterfeiting capacity of the products, and the gold stamping metallic feeling can also improve the packaging grade of the products. The holographic positioning hot stamping machine has very high control requirements on temperature, pressure and speed, the selection of the hot stamping machine type also has great influence on the effect, large-area field hot stamping usually adopts an electro-engraving plate with higher precision and higher cost, and the problems of air bubbles, scutching and the like are also often generated during hot stamping. In addition, the existing positioning hot stamping aluminum is single-color, is very abrupt in comparison with the whole packaging design, and cannot be well blended with the existing packaging color.

Thus, the prior art has yet to be improved and enhanced.

Disclosure of Invention

In view of the defects of the prior art, the invention aims to provide the micro-nano structure anti-counterfeiting hollowed color image-text holographic hot stamping foil, production equipment and a method, which can improve the hot stamping quality.

In order to solve the technical problems, the invention adopts the following technical scheme:

a production facility for preparing anti-fake fretwork colour picture and text holographic thermoprint foil of micro-nano structure, it includes:

the unwinding device is used for providing a base film;

the satellite type printing device is used for coating a release layer on the base film in a full-page manner and printing a color image-text printing layer on the release layer in a mirror image manner;

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 hot roller die pressing device is used for forming a micro-nano structure die pressing holographic image-text layer by die pressing the EVA coating layer in a semi-molten state;

the first evaporation device is used for carrying out vacuum evaporation on the micro-nano structure mould pressing holographic image-text layer to form a zinc sulfide layer;

the first coating device is used for coating a hydrophilic oil layer on the zinc sulfide layer according to the hollow pictures and texts;

the second evaporation device is used for evaporating the metal layer on the hydrophilic oil layer in vacuum;

the off-line cleaning device is used for cleaning the hydrophilic oil layer to strip part of the metal layer to form hollow-out pictures and texts;

the anti-counterfeiting processing device is used for arranging the 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 color image-text holographic hot stamping foil;

and the winding device is used for winding the micro-nano structure anti-counterfeiting hollowed color image-text holographic hot stamping foil.

As the improvement of the invention, the production equipment also comprises a plasma surface treatment device which is used for carrying out plasma surface treatment on the base film and improving the adhesion of the surface of the base film.

Deviation rectifying devices are arranged between the unwinding 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 invention, the anti-counterfeiting processing device comprises:

the coating unit is used for coating the metal layer with the isolation layer;

the anti-counterfeiting code printing unit is used for printing anti-counterfeiting codes 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 a micro-nano structure anti-counterfeiting hollowed color image-text holographic hot stamping foil by production equipment comprises the following steps:

coating a release layer on the base film in a full-page manner;

printing a color image-text printing layer on the release layer in a mirror image manner;

coating an EVA coating layer on the color image-text printing layer;

making the EVA coating layer in a semi-molten state and press polishing the EVA coating layer;

forming a micro-nano structure die pressing holographic image-text layer by adopting the EVA coating layer subjected to hot roller die pressing and calendaring;

vacuum evaporating a zinc sulfide layer on the micro-nano structure die pressing holographic image-text layer;

coating a hydrophilic oil layer on the zinc sulfide layer according to the hollow-out pictures 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 hollow-out pictures and texts;

arranging a hidden image-text layer on the metal layer, and uploading anti-counterfeiting information of the hidden image-text layer;

and coating an adhesive layer on the cleaned metal layer to prepare the micro-nano structure anti-counterfeiting hollowed color image-text holographic hot stamping foil.

As an improvement of the invention, before the step of full-page coating the release layer on the base film, the method further comprises the following steps: and carrying out 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 present invention, the EVA coating layer includes: 30% of modified epoxy acrylic resin, 25% of 1.6-hexanediol diacrylate, 5% of trimethylolpropane triacrylate, 0.9% of an organic silicon leveling agent, 5% of 2-benzyl-2-dimethylamine-1- (4-morpholine benzyl phenyl) butanone, 10% of a mixed diluent, 15% of EVA polyvinyl acetate, 5% of glycerol, 0.7% of triethanolamine and 3.4% of deionized water.

As a further improvement of the present invention, the step of disposing the hidden image-text layer on the metal layer and uploading the anti-counterfeiting information of the hidden image-text layer includes:

coating an isolation 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.

A micro-nano structure anti-counterfeiting hollowed-out color image-text holographic thermoprinting foil prepared by production equipment comprises: the base film that stacks gradually the strippable of setting, from type layer, colored picture and text printing layer, receive nano-structure mould pressing holographic picture and text layer, zinc sulfide layer, metal level, anti-fake information layer and adhesive layer in proper order, the metal level has a plurality of fretworks portion, the adhesive layer covers on the metal level.

Compared with the prior art, the micro-nano structure anti-counterfeiting hollowed color image-text holographic hot stamping foil, the production equipment and the production method provided by the invention have the advantages that the hot stamping quality is improved by adopting a mode of printing first and then stamping, the holographic film pressing effect of various photoetching micro-nano structures and the combination of color images and texts and anti-counterfeiting information can be realized by adopting a color image-text hollowed holographic positioning stamping technology, transparent zinc sulfide and aluminum plating can be combined to realize various effects of metal and photoetching micro-nano structures, the hollowed mode can leak backing paper or printing background colors, the hot stamping foil is covered with the hidden image-text layer through the metal layer, a consumer can verify the hidden image-text layer by scraping the metal layer after purchasing a product, the product anti-counterfeiting tracing function is increased, the product diversity is increased, and the technical blank of the anti-counterfeiting micro-nano structure color image-text holographic hot stamping foil is filled up.

Drawings

FIG. 1 is a flow chart of a preparation method of the micro-nano structure anti-counterfeiting hollowed color image-text holographic hot stamping foil provided by the invention.

FIG. 2 is a process schematic diagram of the preparation method of the micro-nano structure anti-counterfeiting hollowed color image-text holographic hot stamping foil provided by the invention.

FIG. 3 is a schematic diagram of a printing plate in the preparation method of the micro-nano structure anti-counterfeiting hollowed-out color image-text holographic hot stamping foil provided by the invention.

FIG. 4 is a schematic diagram of production equipment for preparing the micro-nano structure anti-counterfeiting hollowed color image-text holographic hot stamping foil provided by the invention.

FIG. 5 is a schematic structural diagram of the micro-nano structured anti-counterfeiting hollowed-out color image-text holographic hot stamping foil provided by the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "on," "secured to" 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 the terms of orientation such as left, right, up and down in the embodiments of the present invention are only relative to each other or are referred to the normal use state of the product, and should not be considered as limiting.

The invention provides a preparation method of a micro-nano structure anti-counterfeiting hollowed color image-text holographic hot stamping foil, which is a positioning hot stamping technology of a multi-layer medium hollowed color image-text with a 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 aluminum plating layer, an anti-counterfeiting image-text layer and the like, the micro-nano structure anti-counterfeiting hollowed color image-text holographic hot stamping foil can be hollowed according to the design requirement, color images and texts are printed on the hot stamping foil, the prior hot stamping and printing process can be replaced, the micro-nano structure anti-counterfeiting hollowed color image-text holographic hot stamping foil can be directly subjected to hot stamping and transfer printing on a paper product, the one-time printing process is reduced, and the thermoprinting plate only needs to adopt a plane plate which is larger than the positioning and scalding area, the plate does not need to register printed matters, and the electric eye identification positioning gold foil registration cursor is registered, so that the efficiency is greatly improved, the processing cost is reduced, the post-process processing difficulty is reduced, and the product quality can be improved.

Referring to fig. 1 and 2, the preparation method of the micro-nano structure anti-counterfeiting hollowed color image-text holographic hot stamping foil provided by the invention comprises the following steps:

s1, coating a release layer on the base film in a full-page manner;

s2, printing a color image-text printing layer on the release layer in a mirror image manner;

s3, coating an EVA coating layer on the color image-text printing layer;

s4, making the EVA coating layer in a semi-molten state and press polishing the EVA coating layer;

s5, forming a micro-nano structure die pressing holographic image-text layer by adopting the EVA coating layer subjected to hot roller die pressing and calendaring;

s6, vacuum evaporation plating of a zinc sulfide layer on the micro-nano structure die pressing holographic image-text layer;

s7, coating a hydrophilic oil layer on the zinc sulfide layer according to the hollow pictures and texts;

s8, performing vacuum evaporation on the hydrophilic oil layer to form a metal layer;

s9, cleaning the hydrophilic oil layer to strip part of the metal layer to form hollow-out pictures 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 manufacture the micro-nano structure anti-counterfeiting hollowed color image-text holographic hot stamping foil.

The mode of stamping after printing is earlier, hot stamping quality is improved, and can realize multiple photoetching micro-nano structure membrane pressing holographic effect through colored fretwork location boiling hot, the combination of colored picture and text and anti-fake information, can combine transparent zinc sulfide and aluminize, realize the metal, the multiple effect of photoetching, the fretwork mode can spill backing paper or printing background color, the thermoprint paper has hidden picture and text layer through the metal level cover, the metal level is scraped away to the accessible after the consumer purchases the product, spill and hide the picture and text layer and verify, increase the anti-fake function of traceing back of product, increase product performance diversity, the technological blank of anti-fake, the holographic thermoprint paper of micro-nano structure colored picture and text has been remedied.

Before step S1, step S0 is further included, in which plasma surface treatment is performed on the base film to improve the adhesion of the base film surface.

Preferably, the invention needs some pre-press treatment when preparing the hot stamping foil, please refer to fig. 3, the positioning hot stamping picture and text needs to be executed pre-press makeup, the positioning hot stamping registration cursor 10 is added on the printing plate, the positioning hot stamping, film pressing and coating registration cross mark 20, the positioning hot stamping, film pressing and coating registration gauge line 30, and the positioning hot stamping, film pressing and coating registration color mark 40, so as to facilitate the positioning of the processes of coating, mould pressing, 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 technique to improve the surface adhesion of the base film. During plasma treatment, 220V stable voltage is adopted to avoid breakdown, compressed oxygen not lower than 0.1MPa is used, the plasma gun head is 5mm away from the surface of the film, and the surface tension of the base film after plasma treatment is larger than or equal to 48N.

In step S1, the release layer is silicone oil which is formed by mixing paraffin, oleic acid, triethanolamine, deionized water and TX-10 emulsifier, the coating is carried out by coating in a 4-cup mode, the coating viscosity is 45 +/-2S, the adhesive force of the coating is less than or equal to 1 grade, 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 used to perform reverse printing (i.e., mirror printing) when printing the color image-text printing layer, four-color and spot-color printing can be achieved by the satellite printing device, so that the base film has images and texts of various colors, and the satellite unit can effectively control the tension of the base film to prevent the base film from being over-stretched, and each color group can be used to register to achieve high-precision registration during printing, thereby improving the registration precision, wherein the registration precision can be within 0.1mm, and the tension can be controlled to make the deformation of the film less than 0.5%. After printing, the adhesive force between the printing layer and the release layer is less than or equal to level 1, and the surface tension of the printing ink is greater than or equal to 48N.

In step S3, when coating the EVA coating layer (i.e., polyvinyl acetate), an anilox roller 8 (as shown in fig. 4) may be used to coat the EVA coating with a thickness of more than 5 μm, and after coating, natural leveling and UV lamp curing are performed to make the adhesion between the EVA coating layer and the printing layer less than or equal to 1 grade and the surface tension greater than or equal to 48N.

Wherein, the EVA dope layer includes: 30% of modified epoxy acrylic resin, 25% of 1.6-hexanediol diacrylate, 5% of trimethylolpropane triacrylate, 0.9% of an organic silicon leveling agent, 5% of 2-benzyl-2-dimethylamine-1- (4-morpholine benzyl phenyl) butanone (namely a photoinitiator 369), 10% of a 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 a micro-nano structure die-pressed holographic image-text layer which is in a semi-molten state at 120 ℃ and can be cooled at normal temperature.

In step S4, the EVA coating layer is in a half-melted state to facilitate subsequent post-film-pressing curing, and after being applied, it is flattened by a calender roll to ensure film-pressing accuracy.

In step S5, the temperature of the hot roll is 100-140 ℃, and preferably, the hot roll 9 at 120 ℃ is used for die pressing to form the micro-nano structure die pressing holographic image-text layer on the EVA coating layer. The invention adopts the hot roller molding process to finish the three-dimensional effect image for anti-counterfeiting, and can also adopt the grating molding process to form the image and text with the depth visual effect, thereby improving the packaging grade.

The surface of the film pressing plate (namely the surface of the hot roller) is provided with a registration cross mark besides film pressing pictures and texts, and the registration is carried out with the printing cross mark in the film pressing process, so that the mould pressing precision is ensured. Because the color image-text printing layer is printed below the micro-nano structure die pressing holographic image-text layer before die pressing, the invention adopts a hot pressing mode for die pressing, and the micro-nano structure die pressing holographic image-text layer can be solidified after cooling, thereby ensuring the die pressing and solidifying effects.

Therefore, between step S5 and step S6, the method further comprises: and cooling the micro-nano structure molded holographic image-text layer through a cooling roller 11, and further solidifying the micro-nano structure molded holographic image-text layer.

After the micro-nano structure die pressing holographic image-text layer is cooled by the cooling roller, the micro-nano structure die pressing holographic image-text layer can be firstly rolled, and then the micro-nano structure die pressing holographic image-text layer is transferred to a vacuum plating workshop to finish the step S6, in the step S6, the rolled color holographic hot stamping foil with the die pressing holographic image-text layer of the micro-nano structure die pressing is unreeled and enters an evaporation plating bin to be fully plated with a zinc sulfide layer, and the zinc sulfide plated layer is a transparent layer and aims to present transparent photoetching images-text after subsequent aluminum washing and be rolled after evaporation plating is finished.

In step S7, the coating roller needs to design a coating pattern according to the hollow pattern, so that the position of the base film that needs to be cleaned is printed with hydrophilic ink, and the position that does not need to be cleaned (i.e., the metal layer needs to be protected) is hollow to form a coating plate. In this embodiment, hydrophilic printing ink and mould pressing glue adhesive force is grade 1 less, adds 13% polarity resin in the hydrophilic printing ink in order to increase evaporating aluminum layer adhesion fastness to the design has the registration cross on the coating printing forme, with the membrane pressure, the printing cross registers, later carries out the thermosetting again, can the rolling send into true plating workshop again and unreel and carry out the coating by vaporization this moment, prevents that the tensile influence of base film registration precision, certainly also can not the rolling directly carries out true plating, in order to raise the efficiency.

In step S7, the hydrophilic ink may be rolled up, and then transferred to a vacuum plating shop to complete the evaporation of the metal layer, and the rolled up after the second evaporation is completed enters the next process. The metal layer is preferably an aluminum layer, so that it can exhibit good metallic effects. In vacuum evaporation, an aluminum layer or other metal medium layer with the purity of more than 99.99 percent is adopted, the vacuum plating thickness is 400 angstroms, and the pressure of the vacuum degree cannot be lower than 10-3 pa.

And then, offline aluminum washing with clear water is carried out, because the part coated with the hydrophilic ink is dissolved in water, the aluminum layer in the area is stripped, the part of the aluminum layer not coated with the hydrophilic ink is remained on the base material, and the aluminum washing precision can reach more than 0.1mm according to the printing registration precision. And the solution for washing the aluminum can be recovered and purified through an extraction and recovery process, so that the direct discharge and environmental pollution are avoided, the aluminum can be recycled, and the cost is saved.

In step S10, adding a hidden image-text layer on the aluminum layer to make the holographic hot stamping foil have an anti-counterfeit function, where the step S10 specifically includes:

s101, coating an isolation layer on the 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.

In step S101, an isolation layer is coated on the aluminum layer corresponding to the hidden image-text position, so that the aluminum layer has a small adhesive force on the hidden image-text and is easy to scratch for verification, in step S102, image-text mirror image jet printing (i.e., reverse jet printing) can be performed on the isolation layer, and the jet printing contents include, but are not limited to, a two-dimensional code, a digital verification code, characters, images and texts. Of course, the printing may be performed by a positioning printing method, and the present invention is not limited thereto.

In S103, the obtained anti-counterfeit code information includes a two-dimensional code, a digital verification code, characters, patterns, and the like, that is, the anti-counterfeit information is jet printed or printed on the isolation layer. Preferably, the step S103 further includes: the method comprises the steps of shooting the outline of a hollow area by a high-definition camera, binding the outline with anti-counterfeiting code information (namely spraying a two-dimensional code, a digital verification code and the like) to form unique information, uploading the binding information to an anti-counterfeiting verification platform for storage, inputting the two-dimensional code, the digital verification code, characters, patterns and the like into the platform by scraping an aluminum layer during verification, calling the corresponding outline in a database to be compared with the actual outline, and achieving the verification purpose. The invention further increases the anti-counterfeiting safety performance by utilizing the characteristic that the outline of the hollow area is convenient to identify and combining the mode of binding the anti-counterfeiting code information, and avoids the situation that the anti-counterfeiting code cannot be truly anti-counterfeiting when being stolen.

And finally, coating fusible thermoplastic resin on the aluminum layer in 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 level 1, the adhesive layer is coated in a positioning mode, the coating area must cover the aluminum layer, and 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 1-2mm), so that the integrity of gold stamping transfer is ensured, and finally, the gold stamping transfer is wound.

The invention adopts the mode that the edge of the adhesive layer exceeds the metal layer, can expose the transparent photoetching image-text plated with the zinc sulfide layer according to different hollow positions, also can present various effects because the aluminized hollow parts expose the base paper or print the base color, can scrape off the aluminum layer during product verification, can show the hidden image-text, and can finish background verification by code scanning.

When the gold stamping is carried out, the positioning and the stamping are directly carried out, when the gold stamping is carried out on the printed product for packaging, the color printing procedures are reduced, and the problem that the metal foil is damaged due to the viscosity of the printing ink in the prior stamping and printing process is also avoided.

The invention also provides a production device for preparing the micro-nano structure anti-counterfeiting hollowed color image-text holographic hot stamping foil, please refer to fig. 4, which comprises:

the unwinding device 1 is used for providing a base film;

the satellite type printing device 3 is used for coating a release layer on the base film in a full-page manner and printing a color image-text printing layer on the release layer in a mirror image manner;

the coating and calendaring device 4 is used for coating the EVA coating layer on the color image-text printing layer, enabling the EVA coating layer to be in a half-melting state and calendaring the EVA coating layer;

the hot roller die pressing device 5 is used for forming a micro-nano structure die pressing holographic image-text layer by die pressing the EVA coating layer in a semi-molten state;

a first evaporation device (not shown in the figure) for evaporating a zinc sulfide layer on the micro-nano structure die pressing holographic image-text layer in vacuum;

a first coating device (not shown in the figure) for coating a hydrophilic oil layer on the zinc sulfide layer according to the hollow-out pictures and texts;

a second evaporation device (not shown) for vacuum evaporating the 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 hollow-out pictures and texts;

the anti-counterfeiting processing device (not shown in the figure) is used for arranging the 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 color image-text holographic hot stamping foil;

and the winding device is used for winding the micro-nano structure anti-counterfeiting hollowed color image-text holographic hot stamping foil.

Unwinding device and coiling mechanism include a plurality of unwinding rollers and wind-up roll, adopt rolling, unreel the mode at coating by vaporization, coating clear water oil, washing aluminium, coating isolation layer etc. and carry out off-line operation, avoid thermoprint paper tinsel overstretch, improve the overprint precision.

Further, the production equipment also comprises a plasma surface treatment device 2 for performing plasma surface treatment on the base film to improve the adhesion of the surface of the base film.

In order to improve the printing precision, in the production equipment, deviation rectifying devices 7 are arranged between the unwinding 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 calendering device 4 comprises an EVA coating unit 8 and a calendering unit (the figure shows the reference number) to complete coating and calendering, and the hot-roll molding device 5 comprises a hot-roll molding unit 9 to perform 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 hot stamping foil, please refer to fig. 5, which comprises: the base film 101, release layer 102, colored picture and text printing layer 103, the holographic picture and text layer 104 of the micro-nano structure mould pressing that stack gradually the setting, zinc sulfide layer 105, metal level 106, anti-fake information layer 107 and adhesive layer 108, the metal level has a plurality of fretwork portions, can make it see through the base colour of printed matter (like paper), the adhesive layer covers on the metal level, directly passes through gilt technology with the rendition of the holographic thermoprint of the anti-fake fretwork colored picture and text of micro-nano structure to the printed matter when the thermoprint, tears the PET membrane on upper strata and can present colored, metallic luster, have degree of depth or three-dimensional effect's printed matter.

In this embodiment, the anti-counterfeit information layer 107 includes an isolation layer 1071 and a hidden image-text layer 1072, and the isolation layer 1071 is disposed on the metal layer 106, so that the aluminum layer is conveniently scraped when the anti-counterfeit information is verified.

In conclusion, the micro-nano structure anti-counterfeiting hollowed-out color image-text holographic hot stamping foil can replace a first-time hot stamping and then printing process, one-time printing process is reduced, the hot stamping plate only needs to be a planar plate larger than a positioning hot stamping area, product plates with small area difference can be shared, the plate does not need to register printed matters, only an electric eye is needed to identify and position a hot stamping foil registration cursor for registration during hot stamping, the efficiency is greatly improved, the processing cost is reduced, the post-process processing difficulty is reduced, and the product quality can be improved. According to the invention, the effect of combining the film pressing holographic effect of various photoetching micro-nano structures with the color images and texts can be realized through the colored hollowed-out positioning ironing, the hollowed-out process can leak the backing paper or the printing background color, the product expression diversity is increased, and the technical blank of the anti-counterfeiting micro-nano structure color image and text holographic thermoprinting foil is filled.

It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.