Composite holographic anti-counterfeiting material capable of being painted without deviation after positioning holographic aluminum washing and preparation method of composite holographic anti-counterfeiting material

Abstract

The invention belongs to the field of packaging materials, and particularly relates to a composite holographic anti-counterfeiting material capable of being painted without deviation after positioning holographic aluminum washing and a preparation method of the composite holographic anti-counterfeiting material. The anti-counterfeiting material is sequentially provided with a base film layer, a dry composite adhesive layer, a color ink layer, a local aluminum plating layer and a holographic image layer from bottom to top, and the local aluminum plating layer and the holographic image layer are in two-way registration; and the color ink layer and the local aluminum-plated layer are completely registered and overlapped. The preparation method comprises the following steps: 1) fully coating the transfer imaging coating on the PET base film layer; 2) carrying out mold pressing on a holographic image and printing washing ink; according to the composite holographic anti-counterfeiting material prepared through the method, a coloring area and an aluminum plating area are completely overlapped, an aluminum plating layer is endowed with different appearance colors, the colorful holographic appearance display effect is good, the anti-copying effect is good, and the anti-counterfeiting performance of a product is improved.

Description

Technical Field

[0001] This invention belongs to the field of packaging materials, specifically relating to a composite holographic anti-counterfeiting material with no deviation after positioning holographic aluminum washing and color coating, and its preparation method. Background Technology

[0002] Traditional holographic aluminum washing can achieve the positioning of the holographic area and the aluminum washing area, which can give the product a more upscale appearance. However, all holographic effects can only be made in silver. Due to the limitations of current technology, it is impossible to meet the requirements of other appearances. The silver holographic effect is relatively monotonous and its application in products is greatly restricted.

[0003] To overcome this deficiency, those skilled in the art have attempted to use a method of positioning and coloring on the aluminum pattern after washing and then placing it on the production line. However, due to the limitations of equipment precision, it is impossible to achieve a complete overlap between the coloring area and the holographic area, resulting in poor color holographic appearance display on the products in the group. Summary of the Invention

[0004] The purpose of this invention is to provide a composite holographic anti-counterfeiting material with no deviation in coloring after holographic aluminum washing and its preparation method. The coloring area completely overlaps with the aluminum plating area, giving the aluminum plating layer different appearance colors and a good color holographic appearance display effect.

[0005] This invention is achieved through the following technical solution: A composite holographic anti-counterfeiting material with no deviation after positioning and aluminum washing is characterized by the following layers arranged from bottom to top: a base film layer, a dry adhesive layer, a color ink layer, a partial aluminum plating layer, and a holographic image layer. The partial aluminum plating layer and the holographic image layer are bidirectionally aligned, and the color ink layer and the partial aluminum plating layer are completely aligned and overlapped.

[0006] The base film layer of this invention is used to achieve the load-bearing capacity of the material, and the material is PET or BOPP. Preferably, the material substrate is a biaxially oriented polyacrylic acid film, with single-sided corona discharge, a surface corona discharge value ≥38dyn, no heat-sealing layer, and a thickness of 18-33μm, which serves as the load-bearing layer of this material.

[0007] The dry coating layer of this invention is a two-component dry composite adhesive for polyurethane, preferably Laizhou Yuli YL6789. The mass ratio of the main agent to the auxiliary agent is 6:1. Ethanol is used as a diluent. It is applied by anilox roller coating, with an on-machine solid content between 18% and 25% and a wet coating weight of 5.0-6.0 g / m². 2 The coating surface is the corona-electrode surface of the BOPP core layer. The adhesive becomes sticky after drying and is bonded to the heat-sealing layer after exiting the oven to complete the lamination.

[0008] The thickness of the partial aluminum plating layer in this invention is 300-450 angstroms. The partial aluminum plating layer is prepared by vacuum evaporation. The function of the partial aluminum plating layer is to give the entire anti-counterfeiting material a metallic luster, making the appearance more dazzling and effectively supporting the appearance.

[0009] The color ink layer of this invention uses a water-based color ink used in conjunction with a water-washable protective ink. This water-based color ink has good compatibility and adhesion with conventional water-washable protective inks. Compared with commercially available ordinary color inks, the water-based color ink of this invention has a better water-disintegration effect and can be detached simultaneously during the aluminum washing process, thereby achieving a 100% overlap between the aluminum plating layer area and the color ink layer.

[0010] Furthermore, the color ink layer of this invention is printed using water-based color ink, and the raw materials and their mass percentages of the Mercury color ink are as follows: Organosilicon-modified waterborne polyurethane 45%-55%; Low viscosity alcohol / water-soluble acrylic resin 8%-12%; Polyvinylpyrrolidone 4%-6%; Ultrafine fumed silica 1.5%-2.5%; Glycerin 1%-2%; Water-based colorant 12%-18%; Color paste dispersant 0.8%-1.2%; Leveling agent 0.3%-0.8%; Defoamer 0.2%-0.4%; Wetting agent 0.8%-1.2%; Alcohol-water mixed solvent: 13.2%-14.3%; The alcohol-water mixed solvent raw materials are ethanol or isopropanol and water, with a mass ratio of 2:1 to 2.5:1.

[0011] The silicone-modified waterborne polyurethane of the above-mentioned waterborne ink is the FS series waterborne polyurethane resin of Anhui Feimiao New Material Co., Ltd., model FS-2440T. It has good resistance to damp heat aging and serves as the main resin of the ink, providing the main film-forming function and adhesion. The silicone modification can enhance the heat resistance.

[0012] The low-viscosity alcohol / water-soluble acrylic resin of the above-mentioned water-based ink, from BASF, model number Joncryl 678, is an auxiliary resin for the ink, which improves the hydrophilicity and water solubility rate of the resin system and helps with synergistic shedding.

[0013] The hydrophilicity enhancer for the aforementioned water-based inks is polyvinylpyrrolidone (PVP). Products from Beijing Solarbio Technology Co., Ltd. are recommended; these are commercially available, mature, and standardized products that significantly improve the ink's hydrophilicity, effectively enhance the hydrophilicity and water solubility of the resin system, and rapidly swell upon contact with water, promoting the overall film peeling off. The filler in the aforementioned water-based inks is a key component, employing ultrafine fumed silica with a native particle size of 10-30 nm. This effectively prevents pigment sedimentation, maintains ink stability, and gives the ink layer a loose structure, facilitating water penetration and easy removal during the aluminum washing process. Fumed silica is rarely used in water-based imaging inks, primarily due to its swelling properties; even a small amount can cause significant swelling in the entire system. To mitigate this drawback, TEGO Wet KL 245 is used as an internal wetting agent. This agent alters the wettability of the fumed silica surface, allowing the silicone-modified waterborne polyurethane to effectively encapsulate the silica particles, preventing swelling. Simultaneously, the addition of silica changes the surface smoothness of the ink layer, effectively reducing the risk of back-sticking after the roll is wound up.

[0014] The diluent used in the above-mentioned water-based inks is glycerin, which absorbs moisture and accelerates the wetting and disintegration of the ink layer during the washing process.

[0015] The color paste in the above-mentioned water-based inks is water-based color paste from Shenzhen Yoshida Chemical Co., Ltd. The color of the color paste is determined according to the end-user requirements. Attention should be paid to the control of pigment particle size. Too high a proportion may affect flexibility and washability.

[0016] The additives for the above-mentioned water-based inks consist of four parts: Shanghai Yitu Industrial Co., Ltd.'s X-405 is used as the pigment dispersant, which can promote the uniform dispersion of pigments in the ink system and prevent agglomeration. The leveling agent used is Dow Corning's DC-51, which can improve the leveling performance of ink after printing, enhance the smoothness of the ink surface after printing, reduce brush marks, obtain a smooth ink layer, and prevent reverse sticking.

[0017] The defoamer used is Dow Corning's DC-62, which is highly effective and long-lasting in defoaming, inhibiting the generation of bubbles during production and printing, and has good compatibility. The wetting agent used is TEGO Wet KL 245, a high-efficiency substrate wetting agent that prevents pinholes, improves leveling and adhesion, reduces ink surface tension, enhances its wetting and spreading ability for water-washable protective inks or substrates, strengthens interfacial bonding, enhances the ability of silicone-modified waterborne polyurethane in the system to encapsulate fumed silica, and prevents system swelling. The above-mentioned water-based inks use an alcohol-water mixture (ethanol:water = 2:1) as a diluent. Isopropanol can be used to dilute the ink during the application process to adjust its viscosity and drying speed, making it suitable for high-speed printing.

[0018] A method for preparing a composite holographic anti-counterfeiting material with no deviation after positioning and aluminum washing, comprising the following steps: 1) Apply a transfer imaging coating to the entire PET base film layer using a 150-mesh ceramic anilox roller, with a wet coating amount of 9.0 g / m². 2 The solid content of the coating is 18%, the coating temperature is 90-120-145-150-90℃, the machine speed is 80m / min, the film surface temperature is 99℃, and the peeling is checked with 3M tape at the winding point. The winding is ensured to be neat. 2) On the substrate coated in step 1), a molding and printing machine is used to imprint the holographic image onto the transfer imaging coating using a nickel plate with a holographic effect. The molding temperature is 180℃ and the roller pressure is 35kg. At the same time, water-washable ink is printed on the area that needs to be washed with aluminum during the molding process. The printing oven temperature is set to 100℃ and the roller pressure is 15kg. The overall production speed is 60m / min and the registration deviation is controlled within ±0.3mm. Step 2) It can present a holographic effect on a transparent substrate and can also pre-treat the parts that need to be de-aluminized, which is an important guarantee for the product's appearance. 3) A dense aluminum coating is applied to the molding surface in step 2). The high-purity aluminum wire is vaporized in a vacuum aluminum plating machine, heated to 1700°C under a vacuum of 10⁻³-10⁻⁴ Pa, and then cooled and adhered to the thin film corona surface to form an aluminum coating layer. The aluminum plating layer serves to protect the embossed holographic pattern and give the material a vibrant metallic luster. 4) Coat the aluminum-plated surface of the material processed in step 3 with printing ink. The color of the printing ink is adjusted according to the end requirements. The coating anilox roller is a 210-mesh metal plate roller, the coating roller pressure is 15kg, the coating temperature is 90-110-130-100℃, and the coating speed is 70m / min. The purpose of step 4) is to pre-color the holographic effect to facilitate precise dealuminization and decolorization in non-appearance areas during subsequent production; Dealuminization is performed in a washing machine. After the base film is unwound, it first passes through an aluminum washing tank. This tank has five brushes rotating in the opposite direction to the film's movement. These brushes remove the aluminum layer and color ink layer from areas covered by the wash ink, leaving behind the holographic aluminum layer and its corresponding color ink layer. Following the aluminum washing tank is a clean water tank, where the film is thoroughly cleaned before being dried in an oven. The oven temperature is 80-100-100-80℃, and the aluminum washing machine speed is 30m / min. The dealuminization process has already given the product its final appearance. 6) Dry lamination: Place the inner corona surface of the BOPP core layer on the auxiliary unwinding seat of the dry laminator, and place the PET transfer film processed in step 3) on the main unwinding seat. Apply transfer adhesive to the aluminized surface of the PET transfer film. After drying in an oven, laminate it with the inner corona surface of the BOPP core layer. Ethyl acetate is used as a diluent when applying the transfer adhesive. The coating is done with an anilox roller, and the solid content on the machine is between 16%. The wet coating amount is 7.0 g / square meter. After lamination, cure at 50℃ for 24 hours. 7) Peeling process: Peel off the PET transfer film from the surface of the film treated in step 4). During the peeling process, all information on the PET transfer film will be transferred to the BOPP core layer. The peeling speed is 100m / min. During the process, it is necessary to ensure complete transfer and neat winding.

[0019] The transfer imaging coating in the process of this invention is an existing acrylic molding transfer coating with a solid content of 18% (preferably Guangdong Banggu RTH series coating). The main resin is CAB-381 acrylic series resin, which has good fluidity, molding imaging performance and edge cutting properties. It is coated by an anilox roller and can be well spread on the non-corona-electrode surface of PET. It is the carrier layer of holographic molding image and belongs to the key layer structure.

[0020] The composite holographic anti-counterfeiting material prepared using this invention has a completely overlapping colored area and an aluminum-plated area, giving the aluminum-plated layer different appearance colors. The color holographic appearance display effect is good, the anti-copying effect is good, and the anti-counterfeiting performance of the product is improved. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the layer structure of the composite holographic anti-counterfeiting material prepared by the present invention. Figure 2 The image shows a physical sample of the composite holographic anti-counterfeiting material prepared in Example 1. Figure 3 The image shows a physical sample of the holographic anti-counterfeiting material prepared in Comparative Example 1.

[0022] As shown in the figure: 1. Base film layer; 2. Dry adhesive layer; 3. Color ink layer; 4. Partial aluminum plating layer; 5. Holographic image layer. Detailed Implementation

[0023] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore merely examples and should not be used to limit the scope of protection of the present invention. It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning understood by those skilled in the art to which this invention pertains. Example 1

[0024] like Figure 1 As shown: The composite holographic anti-counterfeiting material is arranged from bottom to top as follows: base film layer 1, dry adhesive layer 2, color ink layer 3, partial aluminum plating layer 4, and holographic image layer 5. The partial aluminum plating layer 4 and the holographic image layer 5 are bidirectionally aligned, and the color ink layer 3 and the partial aluminum plating layer 4 are completely aligned and overlapped.

[0025] In this embodiment, ink layer 3 is printed using water-based ink. The raw materials and their mass percentages for the Mercury ink are as follows: 50% silicone-modified waterborne polyurethane; 10% low-viscosity alcohol / water-soluble acrylic resin; Polyvinylpyrrolidone 5%; 2% ultrafine fumed silica; Glycerin 2%; 15% water-based colorant; Color paste dispersant 1%; Leveling agent 0.5%; Defoamer 0.3%; 1% wetting agent; Alcohol-water mixed solvent 13.2%; The raw materials for the alcohol-water mixed solvent are ethanol and water, with a mass ratio of 2:1.

[0026] The preparation steps of the composite holographic anti-counterfeiting material in this embodiment are as follows: 1) Apply a transfer imaging coating to the entire PET base film layer using a 150-mesh ceramic anilox roller, with a wet coating amount of 9.0 g / m². 2 The solid content of the coating is 18%, the coating temperature is 90-120-145-150-90℃, the machine speed is 80m / min, the film surface temperature is 99℃, and the peeling is checked with 3M tape at the winding point. The winding is ensured to be neat. 2) On the substrate coated in step 1), a molding and printing machine is used to imprint the holographic image onto the transfer imaging coating using a nickel plate with a holographic effect. The molding temperature is 180℃ and the roller pressure is 35kg. At the same time, water-washable ink is printed on the area that needs to be washed with aluminum during the molding process. The printing oven temperature is set to 100℃ and the roller pressure is 15kg. The overall production speed is 60m / min and the registration deviation is controlled within ±0.3mm. Step 2) It can present a holographic effect on a transparent substrate and can also pre-treat the parts that need to be de-aluminized, which is an important guarantee for the product's appearance. 3) A dense aluminum coating is applied to the molding surface in step 2). The high-purity aluminum wire is vaporized in a vacuum aluminum plating machine, heated to 1700°C under a vacuum of 10⁻³-10⁻⁴ Pa, and then cooled and adhered to the thin film corona surface to form an aluminum coating layer. The aluminum plating layer serves to protect the embossed holographic pattern and give the material a vibrant metallic luster. 4) Coat the aluminum-plated surface of the material processed in step 3 with printing ink. The color of the printing ink is adjusted according to the end requirements. The coating anilox roller is a 210-mesh metal plate roller, the coating roller pressure is 15kg, the coating temperature is 90-110-130-100℃, and the coating speed is 70m / min. The purpose of step 4) is to pre-color the holographic effect to facilitate precise dealuminization and decolorization in non-appearance areas during subsequent production; 5) Dealuminization is performed in a washing machine. After the base film is unwound, it first passes through an aluminum washing tank. The aluminum washing tank has five brushes rotating in the opposite direction to the film feeding direction, which can brush away the aluminum layer and color ink layer in the areas covered by water-wash ink, leaving the holographic aluminum layer and the corresponding color ink layer. After the aluminum washing tank, there is a clean water tank to clean the film before it enters the drying oven. The oven temperature is 80-100-100-80℃, and the aluminum washing speed is 30m / min. The dealuminization process has already given the product its final appearance. 6) Dry lamination: Place the inner corona surface of the BOPP core layer on the auxiliary unwinding seat of the dry laminator, and place the PET transfer film processed in step 3) on the main unwinding seat. Apply transfer adhesive to the aluminized surface of the PET transfer film. After drying in an oven, laminate it with the inner corona surface of the BOPP core layer. Ethyl acetate is used as a diluent when applying the transfer adhesive. The coating is done with an anilox roller, and the solid content on the machine is between 16%. The wet coating amount is 7.0 g / square meter. After lamination, cure at 50℃ for 24 hours. 7) Peeling process: Peel off the PET transfer film from the surface of the film treated in step 4). During the peeling process, all information on the PET transfer film will be transferred to the BOPP core layer. The peeling speed is 100m / min. During the process, it is necessary to ensure complete transfer and neat winding.

[0027] like Figure 2 The image shown is a physical picture of the composite holographic anti-counterfeiting material prepared in this embodiment. Example 2

[0028] The layer structure of the composite holographic anti-counterfeiting material in this embodiment is the same as in Embodiment 1.

[0029] In this embodiment, ink layer 3 is printed using water-based ink. The raw materials and their mass percentages for the Mercury ink are as follows: 45% silicone-modified waterborne polyurethane; 12% low-viscosity alcohol / water-soluble acrylic resin; Polyvinylpyrrolidone 6%; 1.5% ultrafine fumed silica; 1% glycerol; Water-based colorant 18%; Color paste dispersant 1.2%; Leveling agent 0.8%; Defoamer 0.2%; Wetting agent 0.8%; Alcohol-water mixed solvent 13.5%; The alcohol-water mixed solvent raw materials are isopropanol and water, with a mass ratio of 2.5:1.

[0030] The preparation steps of the composite holographic anti-counterfeiting material in this embodiment are as follows: 1) Apply a transfer imaging coating to the entire PET base film layer using a 150-mesh ceramic anilox roller, with a wet coating amount of 9.0 g / m². 2 The solid content of the coating is 18%, the coating temperature is 90-120-145-150-90℃, the machine speed is 80m / min, the film surface temperature is 99℃, and the peeling is checked with 3M tape at the winding point. The winding is ensured to be neat. 2) On the substrate coated in step 1), a molding and printing machine is used to imprint the holographic image onto the transfer imaging coating using a nickel plate with a holographic effect. The molding temperature is 180℃ and the roller pressure is 35kg. At the same time, water-washable ink is printed on the area that needs to be washed with aluminum during the molding process. The printing oven temperature is set to 100℃ and the roller pressure is 15kg. The overall production speed is 60m / min and the registration deviation is controlled within ±0.3mm. Step 2) It can present a holographic effect on a transparent substrate and can also pre-treat the parts that need to be de-aluminized, which is an important guarantee for the product's appearance. 3) A dense aluminum coating is applied to the molding surface in step 2). The high-purity aluminum wire is vaporized in a vacuum aluminum plating machine, heated to 1700°C under a vacuum of 10⁻³-10⁻⁴ Pa, and then cooled and adhered to the thin film corona surface to form an aluminum coating layer. The aluminum plating layer serves to protect the embossed holographic pattern and give the material a vibrant metallic luster. 4) Coat the aluminum-plated surface of the material processed in step 3 with printing ink. The color of the printing ink is adjusted according to the end requirements. The coating anilox roller is a 210-mesh metal plate roller, the coating roller pressure is 15kg, the coating temperature is 90-110-130-100℃, and the coating speed is 70m / min. The purpose of step 4) is to pre-color the holographic effect to facilitate precise dealuminization and decolorization in non-appearance areas during subsequent production; 5) Dealuminization is performed in a washing machine. After the base film is unwound, it first passes through an aluminum washing tank. The aluminum washing tank has five brushes rotating in the opposite direction to the film feeding direction, which can brush away the aluminum layer and color ink layer in the areas covered by water-wash ink, leaving the holographic aluminum layer and the corresponding color ink layer. After the aluminum washing tank, there is a clean water tank to clean the film before it enters the drying oven. The oven temperature is 80-100-100-80℃, and the aluminum washing speed is 30m / min. The dealuminization process has already given the product its final appearance. 6) Dry lamination: Place the inner corona surface of the BOPP core layer on the auxiliary unwinding seat of the dry laminator, and place the PET transfer film processed in step 3) on the main unwinding seat. Apply transfer adhesive to the aluminized surface of the PET transfer film. After drying in an oven, laminate it with the inner corona surface of the BOPP core layer. Ethyl acetate is used as a diluent when applying the transfer adhesive. The coating is done with an anilox roller, and the solid content on the machine is between 16%. The wet coating amount is 7.0 g / square meter. After lamination, cure at 50℃ for 24 hours. 7) Peeling process: Peel off the PET transfer film from the surface of the film treated in step 4). During the peeling process, all information on the PET transfer film will be transferred to the BOPP core layer. The peeling speed is 100m / min. During the process, it is necessary to ensure complete transfer and neat winding. Example 3

[0031] The layer structure of the composite holographic anti-counterfeiting material in this embodiment is the same as in Embodiment 1.

[0032] In this embodiment, ink layer 3 is printed using water-based ink. The raw materials and their mass percentages for the Mercury ink are as follows: 55% silicone-modified waterborne polyurethane; Low viscosity alcohol / water-soluble acrylic resin 8%; Polyvinylpyrrolidone 4%; 2.5% ultrafine fumed silica; Glycerin 1.5%; Water-based pigments 12%; Color paste dispersant 0.8%; Leveling agent 0.3%; Defoamer 0.4%; Wetting agent 1.2%; Alcohol-water mixed solvent 14.3%; The raw materials for the alcohol-water mixed solvent are ethanol and water, with a mass ratio of 2.3:1.

[0033] The preparation steps of the composite holographic anti-counterfeiting material in this embodiment are as follows: 1) Apply a transfer imaging coating to the entire PET base film layer using a 150-mesh ceramic anilox roller, with a wet coating amount of 9.0 g / m².2 The solid content of the coating is 18%, the coating temperature is 90-120-145-150-90℃, the machine speed is 80m / min, the film surface temperature is 99℃, and the peeling is checked with 3M tape at the winding point. The winding is ensured to be neat. 2) On the substrate coated in step 1), a molding and printing machine is used to imprint the holographic image onto the transfer imaging coating using a nickel plate with a holographic effect. The molding temperature is 180℃ and the roller pressure is 35kg. At the same time, water-washable ink is printed on the area that needs to be washed with aluminum during the molding process. The printing oven temperature is set to 100℃ and the roller pressure is 15kg. The overall production speed is 60m / min and the registration deviation is controlled within ±0.3mm. Step 2) It can present a holographic effect on a transparent substrate and can also pre-treat the parts that need to be de-aluminized, which is an important guarantee for the product's appearance. 3) A dense aluminum coating is applied to the molding surface in step 2). The high-purity aluminum wire is vaporized in a vacuum aluminum plating machine, heated to 1700°C under a vacuum of 10⁻³-10⁻⁴ Pa, and then cooled and adhered to the thin film corona surface to form an aluminum coating layer. The aluminum plating layer serves to protect the embossed holographic pattern and give the material a vibrant metallic luster. 4) Coat the aluminum-plated surface of the material processed in step 3 with printing ink. The color of the printing ink is adjusted according to the end requirements. The coating anilox roller is a 210-mesh metal plate roller, the coating roller pressure is 15kg, the coating temperature is 90-110-130-100℃, and the coating speed is 70m / min. The purpose of step 4) is to pre-color the holographic effect to facilitate precise dealuminization and decolorization in non-appearance areas during subsequent production; 5) Dealuminization is performed in a washing machine. After the base film is unwound, it first passes through an aluminum washing tank. The aluminum washing tank has five brushes rotating in the opposite direction to the film feeding direction, which can brush away the aluminum layer and color ink layer in the areas covered by water-wash ink, leaving the holographic aluminum layer and the corresponding color ink layer. After the aluminum washing tank, there is a clean water tank to clean the film before it enters the drying oven. The oven temperature is 80-100-100-80℃, and the aluminum washing speed is 30m / min. The dealuminization process has already given the product its final appearance. 6) Dry lamination: Place the inner corona surface of the BOPP core layer on the auxiliary unwinding seat of the dry laminator, and place the PET transfer film processed in step 3) on the main unwinding seat. Apply transfer adhesive to the aluminized surface of the PET transfer film. After drying in an oven, laminate it with the inner corona surface of the BOPP core layer. Ethyl acetate is used as a diluent when applying the transfer adhesive. The coating is done with an anilox roller, and the solid content on the machine is between 16%. The wet coating amount is 7.0 g / square meter. After lamination, cure at 50℃ for 24 hours. 7) Peeling process: Peel off the PET transfer film from the surface of the film treated in step 4). During the peeling process, all information on the PET transfer film will be transferred to the BOPP core layer. The peeling speed is 100m / min. During the process, it is necessary to ensure complete transfer and neat winding. Comparative Example 1

[0034] This comparative example uses a method of positioning and coloring on the aluminum wash pattern after the aluminum is washed and then fitted off the production line. Figure 3 This is a physical image of the holographic anti-counterfeiting material produced in this comparative example.

[0035] pass Figure 2 and Figure 3 In comparison, it is clear that the composite holographic anti-counterfeiting material prepared using Example 1 of the present invention has a completely overlapping colored area with the aluminum-plated area, giving the aluminum-plated layer different appearance colors, resulting in a better color holographic appearance display effect, better anti-copying effect, and improved anti-counterfeiting performance of the product.

[0036] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A composite holographic security material for positioning holographic post-alum-washing non-biased painting, characterized in that From bottom to top, the base film layer, dry adhesive layer, color ink layer, local aluminum plating layer and holographic image layer are arranged in turn, the local aluminum plating layer and the holographic image layer are bidirectional sleeve, and the color ink layer and the local aluminum plating layer are completely registered and overlapped.

2. The composite holographic security material according to claim 1, wherein the material is capable of being positioned and painted without any deviation after being washed with aluminum. The color ink layer is printed by water-based color ink, and the raw materials and mass percentage of the water-based color ink are as follows: Organic silicon modified water-based polyurethane 45%-55%; Low viscosity alcohol / water soluble acrylic resin 8%-12%; Polyvinylpyrrolidone 4%-6%; Ultrafine fumed silica 1.5%-2.5%; Glycerol 1%-2%; Water-based color paste 12%-18%; Color paste dispersant 0.8%-1.2%; Leveling aid 0.3%-0.8%; Defoaming agent 0.2%-0.4%; Wetting agent 0.8%-1.2%; Alcohol and water mixed solvent 13.2%-14.3%; The alcohol and water mixed solvent raw materials are ethanol or isopropyl alcohol and water, and the mass ratio of the two is 2:1-2.5:

1.

3. A method for preparing a composite holographic security material according to claim 1, which is positioned holographic post-alum-washing non-deviation colored, characterized in that The steps are as follows: 1) Full coat the transfer imaging coating on the PET base film layer, 150 mesh ceramic screen roller, wet coating amount 9.0 g / m 2 The machine solid content is 18%, the coating temperature is 90-120-145-150-90°C, the vehicle speed is 80 m / min, the film surface temperature is 99°C, the peeling is good at the inspection by 3M tape at the winding, and the winding is ensured to be neat; 2) On the base material coated in step 1), use a die printing press to print a holographic image on the transfer imaging coating using a nickel plate with a holographic effect, the die temperature is 180℃, and the rubber roller pressure is 35kg; at the same time, print water-based ink on the area where aluminum needs to be washed during the die printing process, the printing oven temperature is set to 100℃, the rubber roller pressure is 15kg, and the overall production speed is 60m / min, the registration deviation is controlled within ±0.3mm; 3) Perform dense aluminum plating layer treatment on the die printed surface of step 2), perform evaporation in a vacuum aluminum plating machine, vaporize high-purity aluminum wire at a vacuum of 10-3-10-4 Pa, heat to 1700℃, and then attach to the thin film corona surface after cooling to form an aluminum plating layer; 4) Print color ink on the entire aluminum plated surface of the material treated in step three, the coating anilox roller is a 210 mesh metal plate roller, the coating rubber roller pressure is 15kg, and the coating temperature is 90-110-130-100℃, the coating speed is 70m / min; Aluminum is removed in a water washing machine, after the base film is unwound, it first passes through the aluminum washing tank, which has 5 rotating brushes opposite to the film running direction, which can brush off the aluminum layer and color ink layer covered by the water-based ink, leaving the holographic aluminum layer and the corresponding color ink layer, and then the film is washed clean in the clean water tank and enters the oven for drying, the oven temperature is 80-100-100-80℃, and the aluminum washing speed is 30m / min; 6) Dry compounding, place the inner corona surface of the BOPP core layer on the dry compounding machine auxiliary unwinding seat, place the PET transfer film treated in step 5) on the main unwinding seat, use transfer adhesive to coat the aluminum plated surface of the PET transfer film, and after drying in the oven, the BOPP core layer is compounded with the inner corona surface, the transfer adhesive is diluted with ethyl acetate as a diluent, and the anilox roller is coated, the machine solid content is 16%, the wet coating amount is 7.0g / m2, and the compounding is completed in a 50℃ environment for 24 hours. 7) stripping process, the film treated in step 6) is stripped to remove the surface PET transfer film, all information on the PET transfer film will be transferred to the BOPP core layer during the stripping process, the stripping speed is 100 m / min, and it is necessary to ensure complete transfer and neat winding during the process.

Images