Holographic printing integrated hot stamping foil and manufacturing method thereof

Abstract

The invention particularly relates to a holographic printing integrated hot stamping foil and a manufacturing method thereof, the layer structure of the hot stamping foil sequentially comprises a PET base film layer, a release layer, a holographic information layer, a zinc sulfide dielectric layer, an adhesion enhancing coating, a local printing pattern layer, an aluminum plating layer and a back glue layer from top to bottom, and the manufacturing method comprises the following steps: 1) coating water wax as the release layer; 2) coating a holographic layer on the release surface; 3) holographic mould pressing; 4) evaporating a zinc sulfide medium; (5) coating an adhesive force enhancing coating; (6) colored patterns are printed; the technology has the advantages of being stable in operation, capable of guaranteeing uniform quality, easy and convenient to operate, easy to master, capable of reducing manual intervention difficulty, remarkably improving the yield, reducing loss and guaranteeing output benefits, printed patterns and holographic information are displayed in an overlapped mode through the prepared hot stamping foil, and the technology has the advantages of being exquisite in pattern and good in anti-fake performance.

Description

Technical Field

[0001] This invention belongs to the technical field of anti-counterfeiting packaging products, specifically relating to a holographic printing integrated hot stamping foil and its manufacturing method. Background Technology

[0002] With the development of laser engraving technology, hot stamping foil can achieve high-precision and personalized hot stamping effects, such as complex designs like three-dimensional embossing and gradient colors. Currently, hot stamping foil is widely used in high-end packaging, cosmetics and automotive decoration.

[0003] Currently, because the hot stamping foil production process uses wax as a release material, the stamped area cannot be printed with other inks. Therefore, the hot stamping foil can only be used as the last color in the printing process. As a result, the surface of the anti-counterfeiting holographic laser pattern on the packaging product cannot be printed with other patterns, which greatly limits the further development of hot stamping foil. Summary of the Invention

[0004] The purpose of this invention is to provide a holographic printing integrated hot stamping foil and its manufacturing method. The printing pattern is printed between the transparent zinc sulfide dielectric layer and the aluminum layer of the holographic hot stamping foil using highly transparent colored printing ink, so that the holographic pattern surface of the hot stamping foil has a beautiful printed pattern at the same time, thereby improving the anti-counterfeiting performance and the exquisiteness of the hot stamping foil.

[0005] This invention is achieved through the following technical solution: This refers to a holographic printing integrated hot stamping foil, characterized by a layer structure consisting of, from top to bottom, a PET base film layer, a release layer, a holographic information layer, a zinc sulfide dielectric layer, an adhesion-enhancing coating, a partial printed pattern layer, an aluminum plating layer, and an adhesive backing layer. The raw materials and their mass percentages for the adhesion-enhancing coating are as follows: Epoxy acrylate 35%-40%; 1,6-Hexanediol diacrylate 10%-15%; Bifunctional monomers 10%-15%; Nano-silica 5%-8%; Silane coupling agent 3%-5%; Photoinitiator 1%-2%; Additives 1%-2%; Ethyl acetate 23%-25%; The bifunctional monomers are mercaptopropionic acid and acrylic acid, with a mass ratio of 7:3. The additives are dispersants and defoamers, with a mass ratio of 1:1.

[0006] The base resin of this invention is epoxy acrylate (which combines the polarity of epoxy with the flexibility of acrylate), providing film-forming properties and basic adhesion.

[0007] The reactive diluent of this invention is 1,6-hexanediol diacrylate (HDDA), which adjusts viscosity and promotes curing.

[0008] The bifunctional monomer of the present invention is used for chemical anchoring of zinc sulfide and aluminum layers.

[0009] The nano-silica of the present invention preferably has a particle size of 20 nm (smaller than the particle size of zinc sulfide to avoid clogging), and is pretreated with a silane coupling agent before dispersion to physically fill microcracks.

[0010] The silane coupling agent of this invention is KH-560 (γ-glycidoxypropyltrimethoxysilane) from Shanghai Kanglang Biotechnology Co., Ltd., which improves compatibility.

[0011] The photoinitiator of this invention is 1-hydroxycyclohexylphenyl ketone (HCPK), which is UV cured.

[0012] The additives of this invention include BYK-163 as the dispersant and BYK-088 as the defoamer (BYK-Chemie, Germany).

[0013] The solvent used in this invention is ethyl acetate, which is used to adjust the viscosity of the coating.

[0014] The adhesion-enhancing coating of the present invention increases the adhesion between the transparent zinc sulfide dielectric layer and the printed pattern and aluminum layer.

[0015] The partial printed pattern layer of the present invention is located between the transparent zinc sulfide dielectric layer and the aluminum layer, which can present the printed pattern area with a holographic laser effect at the same time, without obscuring the aluminum layer below, and has the metallic texture of traditional hot stamping foil.

[0016] The partial printing pattern layer of the present invention can be customized with personalized patterns according to needs, making the appearance of hot stamping foil more exquisite.

[0017] Furthermore, the partial printed pattern layer of the present invention is printed using highly transparent color ink, and the raw materials and their mass percentages of the highly transparent color ink are as follows: Polyurethane resin 37%-40%; Environmentally friendly plasticizers: 16%-18%; Acetone 22%-25%; Ethyl acetate 11%-13%; Transparent organic pigments 5%-8%; Polyether-modified siloxane 1%-1.5%; Fumed silica 0.5%-0.7%; UV stabilizer 0.3%-0.5%.

[0018] The polyurethane resin used in this invention is a low-viscosity polyurethane resin (transparency ≥ 95%), which provides film-forming properties and adhesion.

[0019] The environmentally friendly plasticizer of this invention is a citrate ester, which reduces resin brittleness without affecting transparency. Preferred, but not limited to, tributyl citrate produced by Shandong Suihua Biotechnology Co., Ltd. or Jiangsu Raymond Chemical Technology Co., Ltd.

[0020] In this invention, acetone and ethyl acetate are used as diluents, with a mass ratio of acetone to ethyl acetate of 2:1, which allows for rapid evaporation and strong solubility.

[0021] The transparent organic pigment of this invention is an ultrafine dispersed phthalocyanine blue / green / red pigment (particle size ≤ 0.1 μm), ensuring high transparency and color rendering.

[0022] The leveling agent of this invention is a polyether-modified siloxane, which eliminates the orange peel effect caused by uneven surface tension. BYK-333 polyether-modified organosilicon water-based leveling agent from BYK Chemicals (Germany) is preferred. The anti-settling agent of the present invention is fumed silica, which prevents pigments from settling.

[0023] The UV stabilizer of the present invention is a benzotriazole class, which delays fading under light, and BASF Tinuvin 360 is preferred.

[0024] The highly transparent colored ink of this invention presents the printed pattern without obscuring the underlying holographic information.

[0025] A method for manufacturing a holographic printing integrated hot stamping foil according to claim 1, comprising the following steps: 1) Select a 20-micron PET corona-free base film, apply 5017 water wax as a release liner, and use a 140-160 mesh electro-engraved metal mesh roller to apply 0.7%-1% water wax as a release layer; 2) Use a 160-180 mesh metal mesh roller to coat the holographic layer on the release surface of the coating machine, and control the dry coating amount to 1.0-1.3 g / m². 3) Holographic molding is performed using a molding machine, with the molding temperature controlled at 160-180℃; 4) Use a coating machine to vapor deposit zinc sulfide medium on the holographic molding surface, and control the OD value of the vapor deposition to be ≥0.04; 5) Apply an adhesion-enhancing coating to the zinc sulfide medium using a 160-180 mesh metal mesh roller on a coating machine, with the dry weight of the coating controlled at 0.5-0.6 g / m². 6) Use a gravure printing machine to print color patterns on the adhesion-enhancing layer; 7) Use a coating machine to perform aluminum coating with a sheet resistance of 1.8-2.3; 8) Use a 140-160 mesh metal mesh roller to coat the backing layer on the coating machine, and control the dry coating weight at 1.4-1.5 g / ㎡.

[0026] Furthermore, the preparation steps of the adhesion-enhancing coating of the present invention are as follows: 1) Preprocessing: Surface modification of nano-silica: Nano-silica was dispersed in anhydrous ethanol at a solid-liquid mass ratio of 1:10. KH-560 was added at a mass of 5% of the nano-silica mass. The mixture was ultrasonically dispersed for 30 minutes, then stirred in a 60°C water bath for 3 hours. After centrifugation, washing with deionized water, and drying, the mixture was heated at 80°C for 2 hours to obtain modified nano-silica. 2) Add epoxy acrylate resin to the reactor, heat to 50°C, slowly add reactive diluent, and stir for 30 minutes until homogeneous; 4) Add the bifunctional monomer, modified nano silica, and silane coupling agent in sequence, and disperse at high speed of 800 rpm for 2 hours to ensure uniform dispersion of each component; 5) Add photoinitiator and additives, and continue dispersing for 30 minutes; 6) Finally, add solvent to adjust the viscosity to 2000-3000 mPa·s, at 25℃, filter through a Forte 4 cup and a 100-mesh sieve to obtain the finished coating.

[0027] Furthermore, the preparation steps of the high-transparency colored ink of the present invention are as follows: 1) Resin pretreatment: Heat the polyurethane resin to 40°C and stir at a constant speed of 500 r / min. Add the plasticizer and mix for 20 minutes until completely homogenized. 2) Solvent preparation: Mix the two solvents in a ratio of acetone to ethyl acetate of 2:1 and stir thoroughly until homogeneous; 3) Pigment dispersion: The transparent organic pigment is premixed with a portion of the diluted solvent and ground with a nano-grind mill until the particle size is ≤0.1μm to form a color paste for later use; 4) Preparation of main agent: Mix the pretreated resin with the remaining diluent, keep the temperature below 25℃ to avoid the solvent from evaporating too quickly, slowly add the color paste, and stir at 800r / min for 30 minutes to ensure that the pigment is evenly dispersed and does not agglomerate. 5) Additives: Add leveling agent, anti-settling agent and UV stabilizer in sequence, reduce stirring speed to 200 r / min to avoid introducing air bubbles, and continue for 30 minutes; 6) Filtration and testing: Remove impurities through a 5μm pore size filter, test viscosity, use a Forte 4 cup, 25℃, 35-45 seconds, test transparency, and measure transmittance ≥90% using a spectrophotometer.

[0028] The process of this invention has the advantages of stable operation, ensuring uniform quality; simple operation, easy to master, reducing the difficulty of manual intervention; significantly improving the yield, reducing losses, and ensuring output efficiency; the hot stamping foil produced by this invention presents the printed pattern and holographic information superimposed, which has the advantages of exquisite pattern and good anti-counterfeiting performance. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the layer structure of the hot stamping foil of the present invention.

[0030] As shown in the figure: 1. PET base film; 2. Release layer; 3. Holographic information layer; 4. Zinc sulfide dielectric layer; 5. Adhesion-enhancing coating; 6. Partially printed pattern layer; 7. Aluminum layer; 8. Adhesive backing layer. Detailed Implementation Example 1

[0031] like Figure 1 As shown: The holographic printing integrated hot stamping foil of this embodiment has a layer structure from top to bottom as follows: PET base film layer 1, release layer 2, holographic information layer 3, zinc sulfide dielectric layer 4, adhesion-enhancing coating 5, partial printing pattern layer 6, aluminum plating layer 7, and adhesive backing layer 8. The raw materials and their mass percentages of the adhesion-enhancing coating are as follows: Epoxy acrylate 35%; 1,6-Hexanediol diacrylate 10%; Bifunctional monomers 15%; Nano-silica 8%; 5% silane coupling agent; Photoinitiator 1%; 1% of the additives; Ethyl acetate 25%; The bifunctional monomers are mercaptopropionic acid and acrylic acid, with a mass ratio of 7:3. The additives are dispersants and defoamers, with a mass ratio of 1:1.

[0032] The aforementioned nano-silica preferably has a particle size of 20nm (smaller than zinc sulfide crystal size to avoid clogging), and is pretreated with a silane coupling agent before dispersion to physically fill microcracks.

[0033] The aforementioned silane coupling agent is KH-560 (γ-glycidoxypropyltrimethoxysilane) from Shanghai Kanglang Biotechnology Co., Ltd.

[0034] The photoinitiator used above is 1-hydroxycyclohexylphenyl ketone (HCPK), and it is UV cured.

[0035] The above-mentioned additives include BYK-163 (dispersant) from BYK Chemicals (Germany) and BYK-088 (defoamer).

[0036] The preparation steps for the adhesion-enhancing coating are as follows: 1) Preprocessing: Surface modification of nano-silica: Nano-silica was dispersed in anhydrous ethanol at a solid-liquid mass ratio of 1:10. KH-560 was added at a mass of 5% of the nano-silica mass. The mixture was ultrasonically dispersed for 30 minutes, then stirred in a 60°C water bath for 3 hours. After centrifugation, washing with deionized water, and drying, the mixture was heated at 80°C for 2 hours to obtain modified nano-silica. 2) Add epoxy acrylate resin to the reactor, heat to 50°C, slowly add reactive diluent, and stir for 30 minutes until homogeneous; 4) Add the bifunctional monomer, modified nano silica, and silane coupling agent in sequence, and disperse at high speed of 800 rpm for 2 hours to ensure uniform dispersion of each component; 5) Add photoinitiator and additives, and continue dispersing for 30 minutes; 6) Finally, add solvent to adjust the viscosity to 2000 mPa·s, at 25℃, filter through a Forte 4 cup and a 100-mesh sieve to obtain the finished coating.

[0037] The adhesion-enhancing coating of this embodiment increases the adhesion between the transparent zinc sulfide dielectric layer and the printed pattern and aluminum layer.

[0038] The partial printed pattern layer in this embodiment is printed using highly transparent color ink. The raw materials and their mass percentages of the highly transparent color ink are as follows: 40% polyurethane resin; 17% environmentally friendly plasticizer; Acetone 22%; Ethyl acetate 11%; 8% transparent organic pigments; 1% polyether-modified siloxane; Fumed silica 0.5%; UV stabilizer 0.5%.

[0039] The polyurethane resin used above is a low-viscosity polyurethane resin (transparency ≥ 95%).

[0040] The aforementioned environmentally friendly plasticizer is tributyl citrate from Shandong Suihua.

[0041] The mass ratio of acetone to ethyl acetate is 2:1.

[0042] The aforementioned transparent organic pigments are ultrafine dispersed phthalocyanine blue / green / red pigments (particle size ≤ 0.1 μm).

[0043] The leveling agent mentioned above is BYK-333 polyether-modified silicone water-based leveling agent from BYK Chemicals, Germany.

[0044] The UV stabilizer mentioned above is BASF Tinuvin 360, which delays fading under light.

[0045] The preparation steps for high-transparency colored inks are as follows: 1) Resin pretreatment: Heat the polyurethane resin to 40°C and stir at a constant speed of 500 r / min. Add the plasticizer and mix for 20 minutes until completely homogenized. 2) Solvent preparation: Mix the two solvents in a ratio of acetone to ethyl acetate of 2:1 and stir thoroughly until homogeneous; 3) Pigment dispersion: The transparent organic pigment is premixed with a portion of the diluted solvent and ground with a nano-grind mill until the particle size is ≤0.1μm to form a color paste for later use; 4) Preparation of main agent: Mix the pretreated resin with the remaining diluent, keep the temperature below 25℃ to avoid the solvent from evaporating too quickly, slowly add the color paste, and stir at 800r / min for 30 minutes to ensure that the pigment is evenly dispersed and does not agglomerate. 5) Additives: Add leveling agent, anti-settling agent and UV stabilizer in sequence, reduce stirring speed to 200 r / min to avoid introducing air bubbles, and continue for 30 minutes; 6) Filtration and testing: Remove impurities through a 5μm pore size filter, test viscosity, use a Forte 4 cup, 25℃, 35 seconds, test transparency, and measure transmittance ≥90% using a spectrophotometer.

[0046] The highly transparent colored ink in this embodiment presents the printed pattern without obscuring the underlying holographic information.

[0047] The manufacturing method of this embodiment includes the following steps: 1) Use a 20-micron PET corona-free base film coated with 5017 water wax as a release layer, and use a 140-mesh electro-engraved metal mesh roller to coat with 1.0% water wax as a release layer; 2) A holographic layer is coated on the release surface using an 180-mesh metal mesh roller on a coating machine, with the coating dry weight controlled at 1.0 g / m². 3) Holographic molding is performed using a molding machine, with the molding temperature controlled at 170℃; 4) Use a coating machine to vapor deposit zinc sulfide medium on the holographic molding surface, and control the OD value of the vapor deposition to be ≥0.04; 5) Apply an adhesion-enhancing coating to the zinc sulfide substrate using a 160-mesh metal mesh roller on a coating machine, with the dry weight of the coating controlled at 0.6 g / m². 6) Use a gravure printing machine to print color patterns on the adhesion-enhancing layer; 7) Use a coating machine to perform aluminum plating with a sheet resistance of 1.8. 8) Use a 140-mesh metal anodized roller on the coating machine to apply the adhesive backing layer, and control the dry coating weight at 1.5 g / ㎡.

[0048] In this embodiment, the partial printed pattern layer is located between the transparent zinc sulfide dielectric layer and the aluminum layer, which can present the printed pattern area with a holographic laser effect at the same time without obscuring the aluminum layer below, and has the metallic texture of traditional hot stamping foil.

[0049] The partial printing pattern layer in this embodiment can be customized with personalized patterns according to needs, making the appearance of the hot stamping foil more exquisite. Example 2

[0050] The holographic printing integrated hot stamping foil layer structure in this embodiment is the same as in Embodiment 1. The raw materials and their mass percentages for the adhesion-enhancing coating are as follows: Epoxy acrylate 40%; 1,6-Hexanediol diacrylate 15%; Bifunctional monomers 10%; 5% nano-silica; Silane coupling agent 3%; Photoinitiator 2%; 2% of the additives; Ethyl acetate 23%; The bifunctional monomers are mercaptopropionic acid and acrylic acid, with a mass ratio of 7:3. The additives are dispersants and defoamers, with a mass ratio of 1:1.

[0051] The requirements for the above raw materials are the same as in Example 1.

[0052] The preparation steps for the adhesion-enhancing coating are as follows: 1) Preprocessing: Surface modification of nano-silica: Nano-silica was dispersed in anhydrous ethanol at a solid-liquid mass ratio of 1:10. KH-560 was added at a mass of 5% of the nano-silica mass. The mixture was ultrasonically dispersed for 30 minutes, then stirred in a 60°C water bath for 3 hours. After centrifugation, washing with deionized water, and drying, the mixture was heated at 80°C for 2 hours to obtain modified nano-silica. 2) Add epoxy acrylate resin to the reactor, heat to 50°C, slowly add reactive diluent, and stir for 30 minutes until homogeneous; 4) Add the bifunctional monomer, modified nano silica, and silane coupling agent in sequence, and disperse at high speed of 800 rpm for 2 hours to ensure uniform dispersion of each component; 5) Add photoinitiator and additives, and continue dispersing for 30 minutes; 6) Finally, add solvent to adjust the viscosity to 2500 mPa·s, at 25℃, filter through a Forte 4 cup and a 100-mesh sieve to obtain the finished coating.

[0053] The partial printed pattern layer in this embodiment is printed using highly transparent color ink. The raw materials and their mass percentages of the highly transparent color ink are as follows: Polyurethane resin 37%; 18% environmentally friendly plasticizer; 25% acetone; Ethyl acetate 12.5%; 5% transparent organic pigments; 1.5% polyether-modified siloxane; Fumed silica 0.7%; UV stabilizer 0.3%.

[0054] The requirements for the above raw materials are the same as in Example 1.

[0055] The preparation steps for high-transparency colored inks are as follows: 1) Resin pretreatment: Heat the polyurethane resin to 40°C and stir at a constant speed of 500 r / min. Add the plasticizer and mix for 20 minutes until completely homogenized. 2) Solvent preparation: Mix the two solvents in a ratio of acetone to ethyl acetate of 2:1 and stir thoroughly until homogeneous; 3) Pigment dispersion: The transparent organic pigment is premixed with a portion of the diluted solvent and ground with a nano-grind mill until the particle size is ≤0.1μm to form a color paste for later use; 4) Preparation of main agent: Mix the pretreated resin with the remaining diluent, keep the temperature below 25℃ to avoid the solvent from evaporating too quickly, slowly add the color paste, and stir at 800r / min for 30 minutes to ensure that the pigment is evenly dispersed and does not agglomerate. 5) Additives: Add leveling agent, anti-settling agent and UV stabilizer in sequence, reduce stirring speed to 200 r / min to avoid introducing air bubbles, and continue for 30 minutes; 6) Filtration and testing: Remove impurities through a 5μm pore size filter, test viscosity, use a Forte 4 cup, 25℃, 40 seconds, test transparency, and measure transmittance ≥90% using a spectrophotometer.

[0056] The steps in this embodiment are as follows: 1) Use a 20-micron PET corona-free base film coated with 5017 water wax as a release layer, and use a 150-mesh electro-engraved metal mesh roller to coat 0.8% water wax as a release layer; 2) A holographic layer is coated on the release surface using a 160-mesh metal mesh roller on a coating machine, with the coating dry weight controlled at 1.3 g / m². 3) Holographic molding is performed using a molding machine, with the molding temperature controlled at 160℃; 4) Use a coating machine to vapor deposit zinc sulfide medium on the holographic molding surface, and control the OD value of the vapor deposition to be ≥0.04; 5) Apply an adhesion-enhancing coating to the zinc sulfide medium using a 170-mesh metal mesh roller on a coating machine, with the dry weight of the coating controlled at 0.55 g / m². 6) Use a gravure printing machine to print color patterns on the adhesion-enhancing layer; 7) Use a coating machine to perform aluminum plating according to a sheet resistance of 2.0; 8) Use a 150-mesh metal anodized roller to coat the adhesive backing layer on the coating machine, and control the dry coating weight at 1.45 g / ㎡. Example 3

[0057] The layer structure of the holographic printing integrated hot stamping foil in this embodiment is the same as that in Embodiment 1. The raw materials and their mass percentages of the adhesion-enhancing coating are as follows: Epoxy acrylate 37%; 1,6-Hexanediol diacrylate 13%; Bifunctional monomers 13%; Nano-silica 6%; 4% silane coupling agent; Photoinitiator 1.5%; Additives 1.5%; Ethyl acetate 24%; The bifunctional monomers are mercaptopropionic acid and acrylic acid, with a mass ratio of 7:3. The additives are dispersants and defoamers, with a mass ratio of 1:1.

[0058] The requirements for the above raw materials are the same as in Example 1.

[0059] The preparation steps for the adhesion-enhancing coating are as follows: 1) Preprocessing: Surface modification of nano-silica: Nano-silica was dispersed in anhydrous ethanol at a solid-liquid mass ratio of 1:10. KH-560 was added at a mass of 5% of the nano-silica mass. The mixture was ultrasonically dispersed for 30 minutes, then stirred in a 60°C water bath for 3 hours. After centrifugation, washing with deionized water, and drying, the mixture was heated at 80°C for 2 hours to obtain modified nano-silica. 2) Add epoxy acrylate resin to the reactor, heat to 50°C, slowly add reactive diluent, and stir for 30 minutes until homogeneous; 4) Add the bifunctional monomer, modified nano silica, and silane coupling agent in sequence, and disperse at high speed of 800 rpm for 2 hours to ensure uniform dispersion of each component; 5) Add photoinitiator and additives, and continue dispersing for 30 minutes; 6) Finally, add solvent to adjust the viscosity to 3000 mPa·s, at 25℃, filter through a Forte 4 cup and a 100-mesh sieve to obtain the finished coating.

[0060] The partial printed pattern layer is printed using highly transparent color ink. The raw materials and their mass percentages for the highly transparent color ink are as follows: Polyurethane resin 38%; 16% environmentally friendly plasticizer; Acetone 24%; Ethyl acetate 13%; Transparent organic pigments: 6.7%; Polyether-modified siloxane 1.3%; Fumed silica 0.6%; UV stabilizer 0.4%.

[0061] The requirements for the above raw materials are the same as in Example 1.

[0062] The preparation steps for high-transparency colored inks are as follows: 1) Resin pretreatment: Heat the polyurethane resin to 40°C and stir at a constant speed of 500 r / min. Add the plasticizer and mix for 20 minutes until completely homogenized. 2) Solvent preparation: Mix the two solvents in a ratio of acetone to ethyl acetate of 2:1 and stir thoroughly until homogeneous; 3) Pigment dispersion: The transparent organic pigment is premixed with a portion of the diluted solvent and ground with a nano-grind mill until the particle size is ≤0.1μm to form a color paste for later use; 4) Preparation of main agent: Mix the pretreated resin with the remaining diluent, keep the temperature below 25℃ to avoid the solvent from evaporating too quickly, slowly add the color paste, and stir at 800r / min for 30 minutes to ensure that the pigment is evenly dispersed and does not agglomerate. 5) Additives: Add leveling agent, anti-settling agent and UV stabilizer in sequence, reduce stirring speed to 200 r / min to avoid introducing air bubbles, and continue for 30 minutes; 6) Filtration and testing: Remove impurities through a 5μm pore size filter, test viscosity, use a Forte 4 cup, 25℃, 45 seconds, test transparency, and measure transmittance ≥90% using a spectrophotometer.

[0063] The method for manufacturing the holographic printing integrated hot stamping foil in this embodiment includes the following steps: 1) Use a 20-micron PET corona-free base film coated with 5017 water wax as a release liner, and use a 160-mesh electro-engraved metal mesh roller to coat 0.7% water wax as a release layer; 2) A holographic layer is coated on the release surface using a 170-mesh metal mesh roller on a coating machine, with the coating dry weight controlled at 1.1 g / m². 3) Holographic molding is performed using a molding machine, with the molding temperature controlled at 180℃; 4) Use a coating machine to vapor deposit zinc sulfide medium on the holographic molding surface, and control the OD value of the vapor deposition to be ≥0.04; 5) Apply an adhesion-enhancing coating to the zinc sulfide substrate using an 180-mesh metal mesh roller on a coating machine, with the dry weight of the coating controlled at 0.5 g / m². 6) Use a gravure printing machine to print color patterns on the adhesion-enhancing layer; 7) Use a coating machine to perform aluminum plating with a sheet resistance of 2.3. 8) Use a 160-mesh metal anodized roller to coat the backing layer on the coating machine, and control the dry coating weight at 1.4 g / ㎡.

Claims

1. A holographic printed integral transfer foil, characterized in that The layer structure from top to bottom is PET base film layer, release layer, holographic information layer, zinc sulfide medium layer, adhesion enhancement coating layer, partial printing pattern layer, aluminum plating layer and back adhesive layer, the raw materials of the adhesion enhancement coating layer and their mass percentages are as follows: Epoxy acrylate 35%-40%; 1,6-hexanediol diacrylate 10%-15%; Bifunctional monomer 10%-15%; Nano-silicon dioxide 5%-8%; Silane coupling agent 3%-5%; Photoinitiator 1%-2%; Auxiliary agent 1%-2%; Ethyl acetate 23%-25%; The bifunctional monomer is mercaptopropionic acid and acrylic acid, and the mass ratio of the two is 7:3; The auxiliary agent is a dispersing agent and a defoaming agent, and the mass ratio of the two is 1:

1.

2. The holographic printed integral stamping foil according to claim 1, characterized in that The partial printing pattern layer is printed by high transparent color ink, and the raw materials of the high transparent color ink and their mass percentages are as follows: Polyurethane resin 37%-40%; Environment-friendly plasticizer 16%-18%; Acetone 22%-25%; Ethyl acetate 11%-13%; Transparent organic pigment 5%-8%; Polyether modified siloxane 1%-1.5%; Fumed silica 0.5%-0.7%; UV stabilizer 0.3%-0.5%.

3. A method of making a holographic printed integral transfer foil according to claim 1, characterized in that The steps are as follows: 1) Select 20 micron PET non-corona base film, coat 5017 water wax release, use 140-160 mesh electric metal screen roller to coat 0.7%-1% water wax as release layer; 2) Use 160-180 mesh metal screen roller to coat holographic layer on the release surface in the coating machine, and the coating dryness is controlled at 1.0-1.3 g / m²; 3) Use mold pressing machine for holographic mold pressing, and the mold pressing temperature is controlled at 160-180℃; 4) Use film plating machine to evaporate zinc sulfide medium on the holographic mold pressing surface, and the evaporation control OD value is greater than or equal to 0.04; 5) Use 160-180 mesh metal screen roller to coat adhesion enhancement coating on the zinc sulfide medium surface in the coating machine, and the coating dryness is controlled at 0.5-0.6 g / m²; 6) Use intaglio printing machine to print color pattern on the adhesion enhancement layer; 7) Use film plating machine to plate aluminum according to 1.8-2.3 square resistance; 8) Use 140-160 mesh metal screen roller to coat back adhesive layer in the coating machine, and the coating dryness is controlled at 1.4-1.5 g / m².

4. The method for manufacturing a holographic printing integrated hot stamping foil according to claim 3, characterized in that... The preparation steps of the adhesion enhancement coating layer are as follows: 1) Pretreatment: Nano-silicon dioxide surface modification: disperse nano-silicon dioxide into anhydrous ethanol, solid-liquid mass ratio 1:10, add KH-560, mass is 5% of nano-silicon dioxide, ultrasonic dispersion for 30 minutes, then stir in 60℃ water bath for 3 hours, centrifugal, wash with deionized water, dry at 80℃ for 2 hours, to obtain modified nano-silicon dioxide; 2) Add epoxy acrylate resin to the reaction kettle, heat to 50℃, slowly add active diluent, stir for 30 minutes to uniform; 4) Add bifunctional monomer, modified nano-silicon dioxide, silane coupling agent in turn, high speed dispersion at 800 rpm for 2 hours to ensure uniform dispersion of each component; 5) Add photoinitiator and auxiliary agent, continue to disperse for 30 minutes; 6) Finally, add solvent to adjust viscosity to 2000-3000 mPa-s, 25℃, coating-4 cup, 100 mesh screen filter to get finished paint.

5. The method for manufacturing a holographic printing integrated hot stamping foil according to claim 3, characterized in that... The preparation steps of high transparent color ink are as follows: 1) Resin pretreatment: heat polyurethane resin to 40℃ and stir at a uniform speed, rotate speed 500 r / min, add plasticizer and mix for 20 minutes to complete homogenization; 2) Solvent configuration: mix two solvents according to the proportion of acetone: ethyl acetate = 2:1 and fully stir to be uniform; 3) Pigment dispersion: pre-mix transparent organic pigment with part of dilution solvent, grind to particle size ≤0.1 μm by using nano sand mill to form color paste for standby; 4) Main agent configuration: mix pretreated resin with remaining dilution solvent, temperature control below 25℃ to avoid solvent volatilization too fast, slowly add color paste, stir at 800 r / min for 30 minutes to ensure uniform dispersion of pigment and no agglomeration; 5) Additive addition: add leveling agent, anti-settling agent and UV stabilizer in sequence, reduce stirring speed to 200 r / min to avoid introducing bubbles, continue for 30 minutes; 6) Filtration and test: remove impurities by 5 μm pore size filter screen, detect viscosity, coating-4 cup, 25℃, 35-45 seconds, detect transparency, measure light transmittance ≥90% by spectrophotometer.

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