Platinum embossment aluminum plating transfer paper for plastic removal of wine bag and preparation process of platinum embossment aluminum plating transfer paper

Abstract

The invention discloses plastic-removing platinum relief aluminized transfer paper for wine bags and a preparation process thereof, and belongs to the technical field of packaging materials. The transfer paper comprises a stripping layer, a platinum relief information layer, a vacuum plating layer, a transfer adhesive layer, a backing paper base layer and a back coating which are sequentially stacked, the stripping layer is a modified waterborne polyurethane resin coating, the platinum relief information layer is a modified waterborne polyurethane resin mold pressing coating, the transfer adhesive layer is a polyurethane resin and acrylic resin mixture coating, and the vacuum plating layer is a vacuum plating layer. And the back coating is a modified acrylic emulsion coating. The preparation process mainly comprises the following steps of coating A, coating B, plate making, mould pressing, vacuum evaporation, coating drying, transshipment compounding and stripping transverse cutting. The transfer paper product disclosed by the invention is high in brightness, stereoscopic and gorgeous in color, solves the problems that the wine bag is not resistant to folding and easy to burst during plastic removal, is easy to degrade, and meets the plastic removal requirement.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging materials, and more particularly to a wine package de-molded platinum embossed aluminum-plated transfer paper and a preparation process thereof. Background Art

[0002] Plastic waste currently accounts for 85% of all marine debris. It is predicted that by 2040, the amount of plastic waste in the ocean will nearly triple, reaching 23 to 37 million tons annually. Currently, over 90% of cigarette packaging products have replaced laminated cardboard with transfer paper (laminated cardboard is produced by applying an adhesive, heat, and pressure to a base paper surface, while transfer paper replaces the plastic film with a water-based coating), thus eliminating plastic. However, social packaging products (including alcohol packaging, daily chemical boxes, and mobile phone boxes) still use laminated cardboard due to their higher requirements for folding and bursting resistance, and are thus not yet fully plasticized. Developing a plastic-free transfer paper specifically for alcohol packaging that exhibits excellent folding resistance, is resistant to bursting, complies with printing processes, and meets the relevant performance requirements of alcohol packaging materials would have widespread application value. Summary of the Invention

[0003] The present invention aims to overcome the shortcomings of the prior art by providing a platinum-embossed aluminum-plated transfer paper for wine packaging and its preparation process. The transfer paper has excellent folding resistance, is not prone to cracking, meets the requirements of wine packaging printing processes, and meets the relevant performance requirements of wine packaging. Furthermore, the product is easily degradable and meets the requirements of plastic removal and environmental protection.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A de-molded platinum-embossed aluminum-plated transfer paper for wine packaging, comprising a peeling layer, a platinum-embossed information layer, a vacuum-plated layer, a transfer adhesive layer, a base paper substrate, and a back coating layer stacked in sequence. The peeling layer is a modified waterborne polyurethane resin coating, the platinum-embossed information layer is a molded coating of a modified waterborne polyurethane resin, the transfer adhesive layer is a coating of a mixture of a polyurethane resin and an acrylic resin, and the back coating is a modified acrylic emulsion coating.

[0006] The present invention is further configured such that the peeling layer and the relief information layer are both coatings formed of a modified polyurethane resin composed of waterborne polyurethane, n-butanol, isopropyl alcohol, ethanol, water, a leveling agent, and a defoaming agent.

[0007] The present invention is further configured such that the transfer adhesive layer is a coating of a mixture of polyurethane resin and acrylic resin in a mass ratio of 9:1.

[0008] The present invention is further configured such that the modified waterborne polyurethane resins used in the peeling layer and the platinum embossed information layer are both PET-7100 color layer resin purchased from Shanghai Bangrong Trading Co., Ltd.

[0009] The present invention is further configured such that the modified acrylic emulsion used in the back coating layer is a water-based back coating HPW-BA001 purchased from Zhongshan Haiheng Packaging Materials Co., Ltd.

[0010] The present invention is further configured such that the peeling layer has a thickness of 2-3 μm; the platinum embossed information layer has a thickness of 2-3 μm; the vacuum coating is an aluminum layer or a ZnS layer with a thickness of 420-470 angstroms; the transfer adhesive layer has a thickness of 2-3 μm; and the base paper has a grammage of 150-350 g / m 2 White cardboard or gray-bottom white board paper; the back coating thickness is 0.3-0.6 μm.

[0011] A preparation process for platinum embossed aluminum-plated transfer paper for wine packaging, comprising the following steps:

[0012] S1, coating A: coating a layer of modified waterborne polyurethane on the PET film to form a peeling layer;

[0013] S2, coating B: coating a layer of modified waterborne polyurethane on the peeling layer;

[0014] S3: Plate making: Design the platinum relief pattern and prepare the platinum relief working plate through photolithography, plate making and electroforming processes;

[0015] S4, molding: molding the modified waterborne polyurethane coating applied in step S2 using a platinum embossing working plate to form a platinum embossed information layer;

[0016] S5. Vacuum evaporation: vacuum evaporating an aluminum layer or a ZnS layer on the platinum embossed information layer to form a vacuum coating;

[0017] S6, composite back coating: coating one side of the base paper with a layer of a mixture of waterborne polyurethane and acrylic emulsion to obtain a transfer adhesive layer, and compounding the material obtained in step S5 with the transfer adhesive layer, and then back coating the other side of the base paper with a layer of modified acrylic emulsion to obtain a back coating layer;

[0018] S7, peeling and cross-cutting: the material obtained in step S8 is placed to solidify, and the PET film is peeled off and cross-cut at the same time to obtain the wine bag de-molded platinum embossed aluminum-plated transfer paper.

[0019] The present invention is further configured as follows: in step S1 and step S2, the coating process is: the coating temperature is 80°C, 120°C, 160°C, 160°C, 120°C, 80°C in sequence, the thermal efficiency is controlled at 82-88°C, the mesh wire roll is 150 mesh, the coating speed is 120m / min, the film release and film collection pressures are both 9-10kg, and the coating roller pressure is 2.3-2.5MPa; the coating dry weight in step S1 is 2.0-2.5g / m 2, the dry coating weight in step S2 is 2.0-2.5g / m 2 .

[0020] The present invention is further configured such that, in step S4, the molding is performed by oil heating, the molding temperature is 180-185°C, the pressure is 0.2-0.4 MPa, the unwinding tension is 7-8 kg, the winding tension is 6.5-7.5 kg, the rubber roller hardness is 95-97 degrees, and the speed is 40-50 m / min.

[0021] The present invention is further configured such that in step S6, the process parameters during compounding are: coating speed of 130-140 m / min, film release pressure of 6.5-7.5 kg, paper release pressure of 30-32 kg, paper collection pressure of 32-34 kg, taper of 50%, composite pressure roller pressure of 4.5-5.5 kg, glue pressure roller pressure of 1.5-2.0 kg, glue reduction pressure roller pressure of 0.5-1.5 kg, blank space of 1-2 mm on the non-cursor side, cooling water temperature of 16-25 ° C, composite rubber roller hardness of 72-75 degrees, glue amount of 7.2-7.8 g / m 2 , the drying temperatures are 0℃, 90℃, 110℃, 100℃, 90℃, and 0℃;

[0022] The process parameters for back coating are: back coating screen roller is 200 mesh, back coating sweeping speed is 900rpm / min, back coating dry weight is 4-5g / m 2 The drying temperatures are 120℃, 120℃, and 120℃ respectively.

[0023] In summary, the present invention has the following beneficial effects:

[0024] The present invention combines formula design with platinum embossing technology and product process improvement to prepare a high-gloss, three-dimensional and colorful wine bag deplasticizing platinum embossed aluminum-plated transfer paper product, which solves the problems of poor folding resistance and easy bursting encountered in wine bag deplasticizing. The product is easy to degrade and meets the deplasticization requirements. The film can also be recycled and customized according to needs to meet production and use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the distribution of each layer of the platinum embossed aluminum-plated transfer paper for wine packaging in Example 1;

[0026] Figure 2 This is a partial appearance picture of the de-molded platinum embossed aluminum-plated transfer paper for wine packaging prepared in Example 1;

[0027] In the figure: peeling layer 1, platinum embossed information layer 2, vacuum coating layer 3, transfer adhesive layer 4, base paper layer 5, back coating layer 6. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] The present invention provides a wine bag de-plasticized platinum embossed aluminum transfer paper comprising a peeling layer 1, a platinum embossed information layer 2, a vacuum coating layer 3, a transfer adhesive layer 4, a base paper substrate 5 and a back coating layer 6, each layer being arranged in a stacked manner. Figure 1 shown.

[0030] The peeling layer 1 has a thickness of 2-3 μm and is a modified waterborne polyurethane resin coating. The platinum relief information layer 2 has a thickness of 2-3 μm and is a molded coating of a modified waterborne polyurethane resin. The modified waterborne polyurethane resin used in both the peeling layer 1 and the platinum relief information layer 2 is preferably PET-7100 color layer resin (a translucent or opaque liquid composed of waterborne polyurethane, n-butanol, isopropyl alcohol, ethanol, water, a leveling agent, and a defoaming agent) purchased from Shanghai Bangrong Trading Co., Ltd.

[0031] The vacuum coating 3 is an aluminum layer or a ZnS layer with a thickness of 420-470 angstroms.

[0032] The transfer adhesive layer 4 has a thickness of 2-3 μm. The transfer adhesive layer 4 is a coating of a mixture of polyurethane resin and acrylic resin, and the mass ratio of polyurethane resin to acrylic resin is 9:1.

[0033] The base paper 5 has a grammage of 150-350 g / m 2 White card paper or white board paper with gray background.

[0034] The back coating layer 6 has a thickness of 0.3-0.6 μm; the back coating layer 6 is a modified acrylic emulsion coating (preferably a water-based back coating HPW-BA001 purchased from Zhongshan Haiheng Packaging Materials Co., Ltd.).

[0035] The preparation process of the wine bag de-plasticized platinum embossed aluminum-plated transfer paper comprises the following steps:

[0036] S1. Coating A: Coat a layer of modified waterborne polyurethane on the PET film to form a peeling layer 1; the coating process is as follows: the coating temperatures are 80°C, 120°C, 160°C, 160°C, 120°C, and 80°C in sequence, the thermal efficiency is controlled at 82-88°C, the mesh wire roll is 150 mesh, the coating speed is 120m / min, the film unwinding and film winding pressures are both 9-10kg, the coating roller pressure is 2.3-2.5MPa, and the coating dry weight is 2.0-2.5g / m 2 .

[0037] S2, coating B: coating a layer of modified waterborne polyurethane on the peeling layer 1; the coating process is as follows: the coating temperature is 80℃, 120℃, 160℃, 160℃, 120℃, 80℃, the thermal efficiency is controlled at 82-88℃, the mesh wire roll is 150 mesh, the coating speed is 120m / min, the film unwinding and film winding pressures are both 9-10kg, the coating roller pressure is 2.3-2.5MPa, and the coating dry weight is 2.0-2.5g / m 2 .

[0038] S3: Plate making: Design the platinum relief pattern and prepare the platinum relief working plate through photolithography, plate making and electroforming processes;

[0039] S4. Molding: The modified waterborne polyurethane coating applied in step S2 is molded using a platinum embossing working plate to form a platinum embossed information layer 2. The molding is performed using oil heating, with a molding temperature of 180-185° C., a pressure of 0.2-0.4 MPa, an unwinding tension of 7-8 kg, a rewinding tension of 6.5-7.5 kg, a rubber roller hardness of 95-97 degrees, and a speed of 40-50 m / min.

[0040] S5, vacuum evaporation: vacuum evaporation of an aluminum layer or a ZnS layer on the platinum relief information layer 2 to form a vacuum coating layer 3; vacuum degree <9.9×10 -2 ; The diameter of the aluminum wire during aluminizing is 1.8mm and the purity is ≥99.98%.

[0041] S6, composite back coating: a layer of waterborne polyurethane and acrylic emulsion mixture is coated on one side of the base paper 5 to obtain a transfer adhesive layer 4, and the material obtained in step S5 is composited with the transfer adhesive layer 4, and then a layer of modified acrylic emulsion is coated on the other side of the base paper 5 to obtain a back coating layer 6; the process parameters during the composite are: coating speed is 130-140m / min, film release pressure is 6.5-7.5kg, paper release pressure is 30-32kg, paper collection pressure is 32-34kg, taper is 50%, composite pressure roller pressure is 4.5-5.5kg, glue pressure roller pressure is 1.5-2.0kg, glue reduction pressure roller pressure is 0.5-1.5kg, 1-2mm of blank space is left on the non-cursor side, cooling water temperature is 16-25℃, composite rubber roller hardness is 72-75 degrees, glue amount is 7.2-7.8g / m 2 , the drying temperatures are 0℃, 90℃, 110℃, 100℃, 90℃, and 0℃;

[0042] The process parameters for back coating are: back coating screen roller is 200 mesh, back coating sweeping speed is 900rpm / min, back coating dry weight is 4-5g / m 2 The drying temperatures are 120℃, 120℃, and 120℃ respectively.

[0043] S7, peeling and cross-cutting: the material obtained in step S8 is placed to solidify, and the PET film is peeled off and cross-cutted at the same time to obtain the wine bag de-molded platinum embossed aluminum-plated transfer paper; the peeling and cross-cutting rate is ≤180 sheets / min.

[0044] In the present invention, the base paper layer 5 is the carrier of the entire wine bag de-plasticizing platinum embossed aluminum-plated transfer paper. The folding resistance of the paper base affects the bursting of the wine bag de-plasticizing platinum embossed aluminum-plated transfer paper. It is necessary to select a paper base with good folding resistance to support each coating. The back coating layer 6 is coated on the back of the base paper layer 5 to ensure the flatness of the paper and prevent deformation of the paper in the subsequent process. The transfer adhesive layer 4 is formed by roller coating, which not only meets the bonding strength between the vacuum coating 3 and the base paper layer 5, but also improves the folding resistance of the product. The platinum embossed information layer 2 adopts polyurethane resin, which has excellent film-forming and folding resistance, and has imaging properties, and can replicate the platinum embossed micro-nano structure. The peeling layer 1 adopts polyurethane resin, which has excellent film-forming and folding resistance, has peeling properties, can be separated from the PET film, and achieves the purpose of de-plasticizing.

[0045] Example 1

[0046] S1. Coating A: A layer of modified waterborne polyurethane (PET-7100 color layer resin purchased from Shanghai Bangrong Trading Co., Ltd.) was coated on the PET film to form a 2 μm thick peeling layer 1; the coating process was as follows: the coating temperatures were 80°C, 120°C, 160°C, 160°C, 120°C, and 80°C in sequence, the thermal efficiency was controlled at 85°C, the mesh wire roll used was 150 mesh, the coating speed was 120 m / min, the film unwinding and film winding pressures were both 9 kg, the coating roller pressure was 2.1 MPa, and the coating dry weight was 2 g / m 2 .

[0047] S2, coating B: a layer of modified waterborne polyurethane (PET-7100 color layer resin purchased from Shanghai Bangrong Trading Co., Ltd.) was coated on the peeling layer 1; the coating process was as follows: the coating temperatures were 80°C, 120°C, 160°C, 160°C, 120°C, and 80°C in sequence, the thermal efficiency was controlled at 85°C, the mesh wire roll used was 150 mesh, the coating speed was 120 m / min, the film unwinding and film winding pressures were both 9 kg, the coating roller pressure was 2.5 MPa, and the coating dry weight was 2.5 g / m 2 .

[0048] S3: Plate making: Design the platinum relief pattern and prepare the platinum relief working plate through photolithography, plate making and electroforming processes;

[0049] S4. Molding: The modified waterborne polyurethane coating applied in step S2 is molded using a platinum embossing working plate to form a 2.5 μm thick platinum embossed information layer 2. The molding is performed using oil heating, with a molding temperature of 180° C., a pressure of 0.3 MPa, an unwinding tension of 7.5 kg, a rewinding tension of 7 kg, a rubber roller hardness of 95 degrees, and a speed of 45 m / min.

[0050] S5, vacuum evaporation: vacuum evaporation of an aluminum layer on the platinum embossed information layer 2 to form a vacuum coating 3 with a coating thickness of 450A; vacuum degree <9.9×10 -2 ; The diameter of the aluminum wire during aluminizing is 1.8mm and the purity is ≥99.98%.

[0051] S6, composite back coating: 220g / m 2 The white cardboard is used as the paper base 5, and a layer of a mixture of water-based polyurethane and acrylic emulsion is coated on one side of the paper base 5 to obtain a transfer adhesive layer 4 with a thickness of 2 μm, and the material obtained in step S5 is compounded with the transfer adhesive layer 4, and then a layer of modified acrylic emulsion (water-based back coating HPW-BA001 purchased from Zhongshan Haiheng Packaging Materials Co., Ltd.) is coated on the other side of the paper base 5 to obtain a back coating layer 6 with a thickness of 0.5 μm; the process parameters during compounding are: coating speed of 130 m / min, film release pressure of 7 kg, paper release pressure of 30 kg, paper collection pressure of 32 kg, taper of 50%, composite pressure roller pressure of 5 kg, glue pressure roller pressure of 2.0 kg, glue reduction pressure roller pressure of 15 kg, blank space of 1-2 mm on the non-cursor side, cooling water temperature of 20 ° C, composite rubber roller hardness of 75 degrees, glue amount of 7.5 g / m 2 The drying temperatures are 0℃, 90℃, 110℃, 100℃, 90℃, and 0℃, respectively. The back coating process parameters are: the back coating screen roller is 200 mesh, the back coating sweeping speed is 900rpm / min, and the back coating dry weight is 4.5g / m 2 The drying temperatures are 120℃, 120℃, and 120℃ respectively.

[0052] S7, peeling and cross-cutting: the material obtained in step S8 is placed to solidify, and the PET film is peeled and cross-cut (peeling and cross-cutting rate ≤ 180 sheets / min) to obtain the wine bag de-molded platinum embossed aluminum transfer paper, the appearance of which is shown in the figure. Figure 2 .

[0053] Comparative Example 1

[0054] The de-molded platinum embossed aluminum-plated transfer paper was prepared according to the method of Example 1, except that the water-based polyurethane 6028 purchased from Shenzhen Jitian Chemical Co., Ltd. was used in step S1.

[0055] Comparative Example 2

[0056] The de-molded platinum embossed aluminum-plated transfer paper was prepared according to the method of Example 1, except that a water-based polyurethane resin with the brand GSB-BT127 purchased from Wenzhou Guoshibang Polymer Materials Co., Ltd. was used in step S1.

[0057] Comparative Example 3

[0058] The de-molded platinum embossed aluminum-plated transfer paper was prepared according to the method of Example 1, except that water-based polyurethane 6028 purchased from Shenzhen Jitian Chemical Co., Ltd. was used in step S2.

[0059] Comparative Example 4

[0060] The de-molded platinum embossed aluminum-plated transfer paper was prepared according to the method of Example 1, except that a water-based polyurethane resin with the brand GSB-BT127 purchased from Wenzhou Guoshibang Polymer Materials Co., Ltd. was used in step S2.

[0061] Comparative Example 5

[0062] The plastic-removed platinum embossed aluminum-plated transfer paper was prepared according to the method of Example 1, except that the back coating layer 6 used a pure acrylic emulsion with model number YC-8813 purchased from Guangdong Yinyang Resin Co., Ltd.

[0063] Comparative Example 6

[0064] The de-molded platinum embossed aluminum-plated transfer paper was prepared according to the method of Example 1, except that the thickness of the platinum embossed information layer 2 was 1 μm.

[0065] Comparative Example 7

[0066] The de-molded platinum embossed aluminum-plated transfer paper was prepared according to the method of Example 1, except that the thickness of the platinum embossed information layer 2 was 4 μm.

[0067] A biodegradation experiment was conducted with reference to GB / T 19275-2024 "Evaluation of the potential biodegradability and disintegration of materials under the action of specific microorganisms" (using the soil landfill test method therein with a landfill time of 90 days). It was found that the 90-day biodegradation rate of the transfer paper prepared in Example 1 was 91.7%.

[0068] The tensile strength of the transfer paper prepared in Example 1 and each comparative example was measured according to the method specified in GB / T31110-2014, "Paper and paperboard - Determination of tensile strength in the Z direction." Samples of 25 cm x 15 cm were cut from the transfer paper prepared in Example 1 and each comparative example. The samples were folded 180° and observed for cracking at the crease. The number of folds required for cracking to occur was recorded. The stiffness of the transfer paper prepared in Example 1 and each comparative example was also measured according to GB / T22364-2008, "Paper and paperboard - Determination of bending stiffness."

[0069] After testing, the tensile strength of the sample in Example 1 is the largest, which is 54.6N·m / g, while the tensile strengths of the samples in Comparative Examples 1 to 7 are between 40.2-55.4N·m / g, and the tensile strength of the sample in Comparative Example 7 is 55.4N·m / g; the number of folding times when the sample in Example 1 bursts is 52 times, while the number of folding times when the samples in Comparative Examples 1 to 7 bursts is between 32-46 times, and the number of folding times of the sample in Comparative Example 7 is 40 times; the bending stiffness of the samples in Example 1 and Comparative Examples 1 to 7 are 5.13, 4.42, 4.51, 4.28, 4.33, 4.59, 4.95, and 4.64mN·m, respectively, and the grammage is 220g / m 2 The bending stiffness of white cardboard is 4.06mN·m.

[0070] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A wine bag de-molding platinum embossed aluminum transfer paper, characterized in that: The transfer paper comprises a peeling layer (1), a platinum relief information layer (2), a vacuum coating (3), a transfer adhesive layer (4), a base paper substrate (5) and a back coating layer (6) which are sequentially stacked. The peeling layer (1) is a modified waterborne polyurethane resin coating, the platinum relief information layer (2) is a molded coating of a modified waterborne polyurethane resin, the transfer adhesive layer (4) is a coating of a mixture of polyurethane resin and acrylic resin, and the back coating layer (6) is a modified acrylic emulsion coating.

2. The wine bag de-molding platinum embossed aluminum transfer paper according to claim 1, characterized in that: The peeling layer (1) and the relief information layer (2) are both coatings formed of a modified polyurethane resin composed of waterborne polyurethane, n-butanol, isopropyl alcohol, ethanol, water, a leveling agent, and a defoaming agent.

3. The wine bag de-molding platinum embossed aluminum transfer paper according to claim 1, characterized in that: The transfer adhesive layer (4) is a coating of a mixture of polyurethane resin and acrylic resin in a mass ratio of 9:

1.

4. The wine bag de-molding platinum embossed aluminum transfer paper according to claim 1, characterized in that: The modified waterborne polyurethane resins used in the peeling layer (1) and the platinum embossed information layer (2) are both PET-7100 color layer resins purchased from Shanghai Bangrong Trading Co., Ltd.

5. The wine bag de-molding platinum embossed aluminum transfer paper according to claim 1, characterized in that: The modified acrylic emulsion used in the back coating (6) is water-based back coating HPW-BA001 purchased from Zhongshan Haiheng Packaging Materials Co., Ltd.

6. The wine bag de-molding platinum embossed aluminum transfer paper according to claim 1, characterized in that: The peeling layer (1) has a thickness of 2-3 μm; the platinum embossed information layer (2) has a thickness of 2-3 μm; the vacuum coating (3) is an aluminum layer or a ZnS layer with a thickness of 420-470 angstroms; the transfer adhesive layer (4) has a thickness of 2-3 μm; the base paper (5) has a grammage of 150-350 g / m 2 White cardboard or gray-bottom white board paper; the back coating (6) has a thickness of 0.3-0.6 μm.

7. A process for preparing the wine bag de-molding platinum embossed aluminum transfer paper according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1, coating A: coating a layer of modified waterborne polyurethane on the PET film to form a peeling layer (1); S2, coating B: coating a layer of modified waterborne polyurethane on the peeling layer (1); S3: Plate making: Design the platinum relief pattern and prepare the platinum relief working plate through photolithography, plate making and electroforming processes; S4, molding: molding the modified waterborne polyurethane coating applied in step S2 using a platinum embossing working plate to form a platinum embossing information layer (2); S5, vacuum evaporation: vacuum evaporating an aluminum layer or a ZnS layer on the platinum relief information layer (2) to form a vacuum coating layer (3); S6, composite back coating: coating one side of the base paper substrate (5) with a layer of a mixture of waterborne polyurethane and acrylic emulsion to obtain a transfer adhesive layer (4), and compounding the material obtained in step S5 with the transfer adhesive layer (4), and then coating the other side of the base paper substrate (5) with a layer of modified acrylic emulsion to obtain a back coating layer (6); S7, peeling and cross-cutting: the material obtained in step S8 is placed to solidify, and the PET film is peeled off and cross-cut at the same time to obtain the wine bag de-molded platinum embossed aluminum-plated transfer paper.

8. The process for preparing the de-molded platinum embossed aluminum-plated transfer paper for wine packages according to claim 7, characterized in that: In the steps S1 and S2, the coating processes are: the coating temperatures are 80°C, 120°C, 160°C, 160°C, 120°C, and 80°C, the thermal efficiency is controlled at 82-88°C, the mesh wire roll is 150 mesh, the coating speed is 120m / min, the film release and film collection pressures are both 9-10kg, and the coating roller pressure is 2.3-2.5MPa; the dry weight of the coating in step S1 is 2.0-2.5g / m 2 , the dry coating weight in step S2 is 2.0-2.5g / m 2 .

9. The process for preparing the de-molded platinum embossed aluminum-plated transfer paper for wine packages according to claim 7, characterized in that: In step S4, the molding is carried out by oil heating, the molding temperature is 180-185°C, the pressure is 0.2-0.4 MPa, the unwinding tension is 7-8 kg, the winding tension is 6.5-7.5 kg, the rubber roller hardness is 95-97 degrees, and the speed is 40-50 m / min.

10. The process for preparing the de-molded platinum embossed aluminum-plated transfer paper for wine packages according to claim 7, characterized in that: In step S6, the process parameters during compounding are: coating speed is 130-140m / min, film release pressure is 6.5-7.5kg, paper release pressure is 30-32kg, paper collection pressure is 32-34kg, taper is 50%, composite pressure roller pressure is 4.5-5.5kg, glue pressure roller pressure is 1.5-2.0kg, glue reduction pressure roller pressure is 0.5-1.5kg, blank space of 1-2mm on the non-cursor side, cooling water temperature is 16-25℃, composite rubber roller hardness is 72-75 degrees, and glue amount is 7.2-7.8g / m 2 , the drying temperatures are 0℃, 90℃, 110℃, 100℃, 90℃, and 0℃; The process parameters for back coating are: back coating screen roller is 200 mesh, back coating sweeping speed is 900rpm / min, back coating dry weight is 4-5g / m 2 The drying temperatures are 120℃, 120℃, and 120℃ respectively.

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