Composite laser anti-counterfeiting packaging material and preparation method thereof

Abstract

The invention relates to a composite laser anti-counterfeiting packaging material and a preparation method thereof. The material comprises a surface coating, an aluminum layer, a local composite coating layer, a base film layer, an adhesive layer, a base paper layer and a back coating which are sequentially arranged from top to bottom, wherein the local composite coating layer, the base film layer and the aluminum layer jointly form a laser composite film with a laser effect and a bright silver effect at the same time. The preparation method comprises the following steps: locally transferring the local composite coating layer to the base film layer through an anilox roller with patterns to form a pre-coating film; carrying out mould pressing on the pre-coating film, forming a transparent laser film on a coating part, and forming a transparent white film on a non-coating part; an aluminum layer is plated on the film subjected to mold pressing, and a laser composite film with a laser pattern and a bright silver surface on the same layout is formed; the laser composite film is compounded with the base paper layer through the adhesive layer to form the pre-printing packaging paper; and coating a back coating and a surface coating on the two surfaces of the pre-printing packaging paper respectively to obtain a final product. Personalized requirements of customers are met, the cost is greatly reduced, and the production efficiency and the product precision are improved.

Description

Technical Field

[0001] The present invention relates to the field of anti-counterfeiting packaging materials, and in particular to a composite laser anti-counterfeiting packaging material and a preparation method thereof. Background Art

[0002] Most of the anti-counterfeiting laser products currently used in the packaging market are traditional single-color paper with patterns added through printing or hot stamping. If consumers want to achieve personalized patterns on laser paper, they currently use a photolithography machine to produce unit patterns, which are then made into films through UV splicing, and then silver sprayed and electroformed to make working nickel plates. A laser machine is then used to transfer aluminum onto the base film, and finally compounded with the base paper to form packaging materials. This undoubtedly has a long production cycle and high costs.

[0003] In view of the increasing demand for anti-counterfeiting packaging paper in the current market, more and more personalized demands, and increasingly fierce competition in the industry, there is an urgent need to improve efficiency and reduce costs through process innovation to meet customer needs and increase corporate profits. Summary of the Invention

[0004] In view of the above-mentioned shortcomings, the present invention provides a composite laser anti-counterfeiting packaging material and a preparation method thereof, which can meet the personalized needs of customers, greatly reduce costs, and reduce a large amount of customer waiting time, thereby improving production efficiency.

[0005] To achieve the above objectives, the embodiments of the present invention adopt the following technical solutions:

[0006] According to a first aspect of the present invention, a composite laser anti-counterfeiting packaging material is provided, comprising a top coating layer, an aluminum layer, a partial composite coating layer, a base film layer, an adhesive layer, a base paper layer, and a back coating layer, which are arranged in sequence from top to bottom. The partial composite coating layer, the base film layer, and the aluminum layer together form a laser composite film having both a laser effect and a light silver effect.

[0007] As an option, the local composite coating layer includes: two-component acrylic resin and nano-silicon dioxide, the nano-silicon dioxide content is 1-3%, the solid content is 17-20%, the viscosity is 18-25s, and the dry coating weight is 0.9-1.0g / m 2 , thermal efficiency 96%.

[0008] As an option, the top coating is made of acrylic resin water-based environmentally friendly material with a solid content of 25-30%, a viscosity of 15-22s, and a top coating amount of 3.5-4g / m 2 , the surface tension after drying is above 38mN / m.

[0009] As an option, the back coating layer is made of water-based environmentally friendly paint made of polyvinyl alcohol, with a solid content of 8%, a viscosity of 30-40s, and a back coating amount of 4-5g / m 2.

[0010] As an option, the adhesive layer is made of acrylic resin latex with a solid content of 50-55%, a viscosity of 18-35s, and a sizing amount of 5-7g / m 2 , peel strength ≥3.5N / 15mm.

[0011] Optionally, the base film layer is a PET composite base film with a thickness of 14-23U and a surface tension of more than 50mN / m on both sides.

[0012] Optionally, the aluminum layer has a thickness of 380 to 520 angstroms, and the base paper layer uses a composite base paper of 90 to 400 grams.

[0013] According to a second aspect of the present invention, a method for preparing a composite laser anti-counterfeiting packaging material is provided, which is used to prepare the composite laser anti-counterfeiting packaging material, comprising the following steps:

[0014] S1, partially transferring the local composite coating layer to the base film layer through a patterned anilox roller to form a pre-coating film;

[0015] S2. Molding the pre-coated film to form a transparent laser film where there is coating and a transparent white film where there is no coating;

[0016] S3, aluminizing the molded film layer to form a laser composite film having a laser pattern and a bright silver surface on the same surface;

[0017] S4, laminating the laser composite film with the base paper layer via the adhesive layer to form pre-printed packaging paper;

[0018] S5. Coating a back coating layer and a top coating layer on both sides of the pre-printed packaging paper to obtain a final product.

[0019] Optionally, a patterned anilox roller is provided with a plurality of cells to form a pattern. During the rotation of the anilox roller, the coating in the cells is transferred to the base film layer, and the remaining coating is removed by a scraper and will not be transferred to the base film layer.

[0020] As an option, when the pre-coated film is molded, if it is a positioning product, the plate spacing is controlled by a single plate, the positioning product starts tension collaborative control, and the PID algorithm is used to dynamically adjust the unwinding tension and the winding tension to achieve a laser pattern positioning accuracy of ±0.1mm, and the molding plate roller temperature is 155-165°C; if it is a non-positioning product, medium-pressure laser is used, the temperature of the first plate roller is 155-160°C, the temperature of the second plate roller is 160-165°C, the pressure is 2.0-3.0MPa, and the dry coating weight of the composite coating layer is 0.9-1.0g / m 2 , thermal efficiency 96%, the thickness of the aluminum layer is 380 to 520 angstroms, and the amount of glue applied to the adhesive layer is 5 to 7 g / m 2The back coating amount of the back coating is 4 to 5 g / m 2 The coating amount of the topcoat is 3.5 to 4 g / m 2 .

[0021] Advantages of the implementation of the present invention: The present invention can meet the personalized needs of customers, reduce the need for a series of processes from pattern design to UV lithography, UV plate making, silver spraying, electroforming, etc., greatly reduce costs, and reduce a large amount of customer waiting time; the present invention realizes personalized laser patterns on the paper base, which can reduce the subsequent printing pattern production or reduce color groups, and can also replace the printing of hot stamping patterns, thereby reducing the customer's printing costs to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic structural diagram of the composite laser anti-counterfeiting packaging material of the present invention.

[0024] The names corresponding to the serial numbers in the figure are as follows:

[0025] 1. Back coating layer; 2. Base paper layer; 3. Adhesive layer; 4. Base film layer; 5. Local composite coating layer; 6. Aluminum layer; 7. Top coating layer.

[0026] Figure 2 The invention relates to a preparation method of a composite laser anti-counterfeiting packaging material. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "top", "bottom", "one side", "the other side", "front", "back", "middle part", "inside", "top", "bottom", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] Example 1

[0029] like Figure 1 and Figure 2 As shown, a composite laser anti-counterfeiting packaging material includes, from top to bottom, a top coating layer 7, an aluminum layer 6, a partial composite coating layer 5, a base film layer 4, an adhesive layer 3, a base paper layer 2, and a back coating layer 1. The partial composite coating layer 5, the base film layer 4, and the aluminum layer 6 together form a laser composite film having both a laser effect and a silver effect. The preparation method of the composite laser anti-counterfeiting packaging material includes the following steps:

[0030] The local composite coating layer is partially transferred to the base film layer 4 through a patterned anilox roller to form a pre-coated film; the pre-coated film is molded to form a transparent laser film in the coated area and a transparent white film in the uncoated area; the molded film is aluminized 6 to form a laser composite film with a laser pattern and a bright silver surface on the same surface; the laser composite film is compounded with the base paper layer 2 through an adhesive layer 3 to form a pre-pressed packaging paper; the back coating 1 and the top coating 7 are respectively coated on both sides of the pre-pressed packaging paper to obtain the final product.

[0031] Furthermore, a plurality of cells are provided on the patterned anilox roller to form a pattern. During the rotation of the anilox roller, the coating in the cells is transferred to the base film layer, and the remaining coating is removed by a scraper and will not be transferred to the base film layer.

[0032] In this embodiment, the back coating 1 is made of water-based environmentally friendly paint made of polyvinyl alcohol, with a solid content of 8% and a viscosity of 30s to 40s. 4 cups are coated at room temperature of 18°C ​​to 25°C. It can fill the back of the paper well and better balance the moisture of the paper. The back coating amount is generally 4g / m 2 ~5g / m 2 .

[0033] In this embodiment, the base paper layer 2 can adopt various composite bottom papers ranging from 90 grams to 400 grams. According to the requirements of product types, most cigarette packs use bottom papers of 90 to 250 grams, which have higher requirements for VOC, good surface smoothness, and more than 300S on the front side; for social cards, bottom papers of 250 grams to 400 grams are generally required, and the smoothness requirements for social cards are relatively low.

[0034] In this embodiment, the adhesive layer 3 generally adopts acrylic resin latex, with a solid content of 50% to 55%, a viscosity of 18s to 35s, and 4 cups of coating at room temperature of 18°C ​​to 25°C. It has good composite fastness, that is, strong adhesion, good leveling, and a certain degree of stickiness; the amount of glue applied is 5g / m 2 ~7g / m 2 .

[0035] In this embodiment, the base film layer 4 uses a PET composite base film with a thickness of more than 14U (micrometers), and can use a biaxially oriented polyester film (BOPET). The surface tension on both sides reaches more than 50mN / m. Generally, the material must be corona treated before coating.

[0036] In this embodiment, the local composite coating layer 5 adopts a traditional two-component acrylic resin with a solid content of 17% to 20%, a viscosity of 18s to 25s, and a coating dry weight of 0.9g / m2 at room temperature. 2 ~1.0g / m 2 , thermal efficiency 96%. The coating has good wettability and leveling properties.

[0037] In this embodiment, the aluminum layer 6 has a thickness of 380 angstroms to 520 angstroms and is tightly bonded to the local composite coating layer 5 , thereby increasing the metallic luster of the product and having a moisture and oxygen barrier effect.

[0038] In this embodiment, the top coating 7 is made of acrylic resin water-based environmentally friendly material with a solid content of 25% to 30%, a viscosity of 15s to 22s, and a coating amount of 3.5g / m 2 ~4g / m 2 The topcoat 7 has good leveling and drying properties, and the surface tension after drying is above 38mN / m, and has good bonding properties with the printing substrate.

[0039] The beneficial effects of this embodiment are: the present invention can meet the personalized needs of customers, reduce the need for a series of processes from pattern design to UV lithography, UV plate making, silver spraying, electroforming, etc., greatly reduce costs, and reduce a large amount of customer waiting time; the present invention realizes personalized laser patterns on paper bases, which can reduce subsequent printing pattern production or reduce color groups, and can also replace printing hot stamping patterns, reducing customers' printing costs to a certain extent.

[0040] Example 2

[0041] This embodiment provides a method for preparing a composite laser anti-counterfeiting packaging material. The composite laser anti-counterfeiting packaging material can be used to make both ordinary non-positioning anti-counterfeiting laser materials and laser positioning anti-counterfeiting materials. The method for preparing the composite laser anti-counterfeiting packaging material includes the following steps:

[0042] Step 1: Transfer the local composite coating layer 5 to the base film layer 4 to form a pre-coated film; specifically, the following steps are performed: the required groove pattern is processed on the coating screen roller, and the non-patterned coating is completely scraped off by the ink blade during the coating process, while the patterned coating is transferred to the biaxially oriented polyester film (BOPET) base film material through the mesh; the coating dry weight is 0.9g / m 2 ~1.0g / m 2, thermal efficiency 96%, the paint is fully dried; if pattern positioning printing is required, the fixed-length stretching tension is controlled during coating to achieve a plate distance of one screen circumference, and the plate distance deviation is within ±0.3mm.

[0043] Step 2: The pre-coated film is molded to form a laser film. During molding, any customer-specified plate can be used, such as light beams, plain surfaces, and various decorative plates as the pattern background. The areas with paint are molded to achieve the laser pattern, while areas without paint cannot be molded and are white plates. During molding, if the product is a positioning product, the plate spacing is controlled by a single plate. For positioning products, tension collaborative control is enabled, and a PID algorithm is used to dynamically adjust the unwinding tension and rewinding tension to achieve a laser pattern positioning accuracy of ±0.1mm. The molding plate roller temperature is 155-165°C. For non-positioning products, medium-pressure laser production is used, with the first plate roller temperature at 155-160°C, the second plate roller temperature at 160-165°C, and the pressure at 2.0-3.0MPa.

[0044] Step 3: The molded transparent laser film is plated with an aluminum layer 6 to form a laser composite film, wherein the thickness of the aluminum layer 6 is 380 angstroms to 520 angstroms. The patterned areas are laser patterns, and the non-patterned areas are matte silver, achieving a perfect combination of matte silver and laser on one page.

[0045] Step 4: Use a wet laminating machine to laminate the laser composite film with the base paper layer 2 through the adhesive layer 3 to form a pre-printed packaging paper, wherein the amount of adhesive applied to the adhesive layer 3 is 5g / m 2 ~7g / m 2 ;

[0046] Step 5: Coat the back coating 1 and the top coating 7 on both sides of the pre-printed packaging paper to obtain the final product; the back coating amount of the back coating 1 is 4g / m 2 ~5g / m 2 The coating weight of topcoat 7 is 3.5g / m 2 ~4g / m 2 The packaging material or packaging paper can be used in a series of products such as cigarette packages, medicine packages, and food packages.

[0047] In this embodiment, the back coating 1 is made of water-based environmentally friendly paint made of polyvinyl alcohol, with a solid content of 8% and a viscosity of 30s to 40s. 4 cups are coated at room temperature of 18°C ​​to 25°C. It can fill the back of the paper well and better balance the moisture of the paper. The back coating amount is generally 4g / m 2 ~5g / m 2 .

[0048] In this embodiment, the base paper layer 2 can adopt various composite bottom papers ranging from 90 grams to 400 grams. According to the requirements of product types, most cigarette packs use bottom papers of 90 to 250 grams, which have higher requirements for VOC, good surface smoothness, and more than 300S on the front side; for social cards, bottom papers of 250 grams to 400 grams are generally required, and the smoothness requirements for social cards are relatively low.

[0049] In this embodiment, the adhesive layer 3 generally adopts acrylic resin latex with a solid content of 50% to 55%, a viscosity of 18s to 35s, and 4 cups of coating at room temperature of 18°C ​​to 25°C. It has good composite firmness, that is, strong adhesion, good leveling, and a certain degree of persistent adhesion.

[0050] In this embodiment, the surface tension of the biaxially oriented polyester film (BOPET) reaches above 48 mN / m on both sides. Generally, the material needs to be corona treated before coating.

[0051] In this embodiment, the local composite coating layer 5 is made of a conventional two-component acrylic resin with a solid content of 17% to 20% and a viscosity of 18s to 25s. Four cups are applied at room temperature. This coating has good wettability and leveling properties.

[0052] In this embodiment, the aluminum layer 6 is tightly combined with the local composite coating layer 5, which increases the metallic luster of the product and has moisture and oxygen barrier effects.

[0053] In this embodiment, the top coating 7 is made of acrylic resin water-based environmentally friendly material with a solid content of 25% to 30%, a viscosity of 15s to 22s, and 4 cups of coating at a room temperature of 18°C ​​to 25°C. The top coating 7 has good leveling and drying properties, and a surface tension of more than 38mN / m after drying, and has good bonding with the printing substrate.

[0054] The beneficial effects of this embodiment are:

[0055] 1. The present invention realizes the personalized needs of customers through the coating and processing of the screen roller pattern engraving process, which reduces the need for a series of processes from pattern design to UV lithography, UV plate making, silver spraying, electroforming, etc., and these processes are costly and cumbersome. This process greatly reduces the cost and shortens the waiting time of a large number of customers;

[0056] 2. Using traditional plain plates and pattern plates as the personalized pattern background required by customers, it realizes the sublimation of traditional plate utilization, and the places without patterns can be made of glossy silver, realizing the perfect combination of glossy silver and laser patterns on one plate;

[0057] 3. Through the engraving and fixed-length stretching tension control of the coated screen, not only conventional non-positioned products can be achieved (fast and efficient through mold pressing), but also positioned laser products can be achieved (positioned laser products can be achieved through single-plate mold pressing to control the plate distance)

[0058] 4. The present invention realizes personalized laser patterns on the paper base, which can reduce the subsequent printing pattern production or reduce the color group, and can also replace the printing of hot stamping patterns, thereby reducing the customer's printing costs to a certain extent.

[0059] Example 3: Preparation of composite laser anti-counterfeiting packaging paper for cigarettes

[0060] 1. Material composition (set from top to bottom)

[0061] Topcoat: Adopt acrylic resin water-based environmentally friendly material, solid content 25%, viscosity 18s coating 4 cups, room temperature 20℃, topcoat amount 3.8g / m 2 The surface tension after drying is 40mN / m, ensuring good bonding with printing ink.

[0062] Aluminum layer: 450 angstroms thick, formed by a vacuum aluminum plating process, giving it a metallic luster and enhancing moisture and oxygen barrier properties.

[0063] Local composite coating layer: two-component acrylic resin-based coating, containing 2% nano-silicon dioxide, solid content 18%, viscosity 20s, coating dry weight 1.0g / m 2 , thermal efficiency 96%, used to form the laser pattern area.

[0064] Base film layer: 18U thick PET composite base film (BOPET), with a surface tension of 52mN / m on both sides (after corona treatment), providing a stable supporting base.

[0065] Adhesive layer: acrylic resin latex, solid content 52%, viscosity 25s, sizing amount 6g / m 2 , peel strength 4N / 15mm, ensuring that the film layer and the base paper are firmly laminated.

[0066] Base paper layer: 150g composite bottom paper (common specifications for cigarette packages), surface smoothness above 350S, low VOC content, meeting the environmental protection requirements of tobacco packaging.

[0067] Back coating: polyvinyl alcohol water-based coating, solid content 8%, viscosity 35s, back coating amount 4.5g / m 2 , balance paper moisture and improve printability.

[0068] 2. Preparation steps

[0069] Preparation of pre-coating film: Use an anilox roller engraved with a laser pattern exclusive to the cigarette brand (the cell depth matches the amount of paint transferred) to apply a local composite coating layer at a rate of 1.0 g / m 2 The dry amount is locally transferred to the PET base film, and the coating in the non-patterned area is removed by a doctor blade to form a pre-coated film.

[0070] Compression molding: For non-positioned cigarette packaging products, a medium-pressure laser process is used: the temperature of the first roller is 158°C, the temperature of the second roller is 163°C, and the pressure is 2.5MPa. During compression molding, the patterned area with coating forms a transparent laser texture due to thermoplastic deformation of the coating, and the uncoated area remains in a transparent white film state.

[0071] Aluminum plating: The film layer after molding is vacuum-aluminum-plated, and the thickness of the aluminum layer is controlled at 450 angstroms, so that the laser texture area presents a colorful optical effect, and the texture-free area forms a uniform silver surface, realizing the combination of laser and silver on the same layout.

[0072] Base paper lamination: through wet laminating machine, with 6g / m 2 The amount of glue applied is to compound the laser composite film with 150g of cigarette base paper through the adhesive layer to form pre-printing packaging paper, ensuring that the peel strength is ≥3.5N / 15mm.

[0073] Double-sided coating: Apply acrylic resin water-based coating on one side of the composite film, 3.8g / m 2 The dry weight, surface tension after drying is 40mN / m, which meets the subsequent printing requirements. Polyvinyl alcohol coating is applied on the other side of the base paper, 4.5g / m 2 Dry weight, improve paper flatness and moisture resistance.

[0074] Example 4: Pakistani 250g 680*551PET laser positioning composite paper:

[0075] Materials: 225g Hongta white cardboard, 14.3μm PET rich fiber composite base film (50mN / m after corona), 1582C composite glue (50% solid content), 3000B back coating, 1# top coating (containing nano-SiO22%, solid content 25%), Weikai 7203D coating (containing nano-SiO23wt%, solid content 17%).

[0076] Coating process: 160-line electric anilox roller with the required pattern of the product, dry coating amount 1.3 g / ㎡, plate spacing control 551±0.1mm.

[0077] Molding process: single plate positioning molding, use 296# light column background pattern to pass the plate, pressure 2.5MPa, plate roller temperature 160℃, plate distance control 550.5±0.1mm.

[0078] Aluminum plating process: aluminum layer thickness 30nm.

[0079] Lamination process: fixed length stretching, plate spacing 551±0.1mm, glue amount 6.5g / m2, dry weight: 3.2g / m2, peel strength 4.0N / 15mm, top coating amount: 4g / m2.

[0080] Dry weight: 1g / m2, abrasion resistance 580 times (Taber test), ethanol wiping resistance 65 times.

[0081] Effect verification:

[0082] Anti-counterfeiting: The laser pattern changes color dynamically at a viewing angle of 20°-70° (ISO 12947-2 certified); the precision deviation is as low as 0.1mm, which improves the product quality and makes it difficult for ordinary companies to imitate, thereby enhancing the company's competitiveness.

[0083] Economical: The comprehensive cost of the product is 1.5 yuan / ㎡, which is 40% lower than the traditional process; key products do not require hot stamping and overprinting in subsequent printing, saving more than 40% of printing costs.

[0084] Durability: After 1000h of accelerated aging test (85℃ / 85%RH), the aluminum layer did not oxidize or fall off.

[0085] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variation, combination, or substitution that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A composite laser anti-counterfeiting packaging material, characterized in that: The invention comprises a top coating layer, an aluminum layer, a local composite coating layer, a base film layer, an adhesive layer, a base paper layer and a back coating layer which are arranged in sequence from top to bottom. The local composite coating layer, the base film layer and the aluminum layer together form a laser composite film having both laser effect and optical silver effect.

2. The composite laser anti-counterfeiting packaging material according to claim 1, characterized in that: The local composite coating layer includes: two-component acrylic resin and nano-silicon dioxide, the nano-silicon dioxide content is 1-3%, the solid content is 17-20%, the viscosity is 18-25s, and the dry coating weight is 0.9-1.0g / m 2 , thermal efficiency 96%.

3. The composite laser anti-counterfeiting packaging material according to claim 1, characterized in that: The top coating is made of acrylic resin water-based environmentally friendly material with a solid content of 25-30%, a viscosity of 15-22s, and a top coating amount of 3.5-4g / m 2 , the surface tension after drying is above 38mN / m.

4. The composite laser anti-counterfeiting packaging material according to claim 1, characterized in that: The back coating layer is made of water-based environmentally friendly paint made of polyvinyl alcohol, with a solid content of 8%, a viscosity of 30-40s, and a back coating amount of 4-5g / m 2 .

5. The composite laser anti-counterfeiting packaging material according to claim 1, characterized in that: The adhesive layer is made of acrylic resin latex with a solid content of 50-55%, a viscosity of 18-35s, and a sizing amount of 5-7g / m 2 , peel strength ≥3.5N / 15mm.

6. The composite laser anti-counterfeiting packaging material according to claim 1, characterized in that: The base film layer is a PET composite base film with a thickness of 14-23U and a surface tension of more than 50mN / m on both sides.

7. The composite laser anti-counterfeiting packaging material according to claim 1, characterized in that: The thickness of the aluminum layer is 380 to 520 angstroms, and the base paper layer is a composite base paper of 90 to 400 grams.

8. A method for preparing a composite laser anti-counterfeiting packaging material, characterized in that: The method for preparing the composite laser anti-counterfeiting packaging material according to any one of claims 1 to 7 comprises the following steps: S1, partially transferring the local composite coating layer to the base film layer through a patterned anilox roller to form a pre-coating film; S2. Molding the pre-coated film to form a transparent laser film where there is coating and a transparent white film where there is no coating; S3, aluminizing the molded film layer to form a laser composite film having a laser pattern and a bright silver surface on the same surface; S4, laminating the laser composite film with the base paper layer via the adhesive layer to form pre-printed packaging paper; S5. Coating a back coating layer and a top coating layer on both sides of the pre-printed packaging paper to obtain a final product.

9. The preparation method according to claim 8, characterized in that The patterned anilox roller is provided with a number of cells to form a pattern. During the rotation of the anilox roller, the paint in the cells is transferred to the base film layer, and the remaining paint will be removed by a scraper and will not be transferred to the base film layer.

10. The preparation method according to claim 8, characterized in that When molding the pre-coated film, if it is a positioning product, the plate spacing is controlled by a single plate, the positioning product starts tension collaborative control, and the PID algorithm is used to dynamically adjust the unwinding tension and the winding tension to achieve a laser pattern positioning accuracy of ±0.1mm, and the molding plate roller temperature is 155-165°C; if it is a non-positioning product, medium-pressure laser is used, the temperature of the first plate roller is 155-160°C, the temperature of the second plate roller is 160-165°C, the pressure is 2.0-3.0MPa, and the dry coating weight of the composite coating layer is 0.9-1.0g / m 2 , thermal efficiency 96%, the thickness of the aluminum layer is 380 to 520 angstroms, and the amount of glue applied to the adhesive layer is 5 to 7 g / m 2 The back coating amount of the back coating is 4 to 5 g / m 2 The coating amount of the topcoat is 3.5 to 4 g / m 2 .

Images