Scratch-resistant transfer membrane material and preparation process thereof

Abstract

The invention belongs to the field of transfer membranes, and particularly relates to a scratch-resistant transfer membrane material and a preparation process thereof. The preparation method is based on blending of rigid components and flexible resin and intermolecular crosslinking reinforcement. According to the coating, waterborne polyurethane resin is used as a main film-forming material, and meanwhile, high-hardness waterborne acrylic resin with a specific proportion is doped, so that the cured coating has hardness for resisting deformation and elasticity for absorbing stress. On the basis, an environment-friendly cross-linking agent is introduced into the formula of the coating, and the auxiliary agent chemically reacts with an active functional group on a resin molecular chain in the baking process, so that the cohesion strength and the overall durability of the coating are enhanced. And the compactness of the coating is further improved through the cross-linked structure, so that the coating has better tolerance to solvents and heat in subsequent processing, and the definition of laser patterns and the gloss of an aluminum-plated layer are guaranteed. And the final product meets the strict solvent residue limit standard, and is suitable for the packaging field with higher safety requirements.

Description

Technical Field

[0001] This invention relates to the field of transfer film technology, specifically to a scratch-resistant and fold-resistant transfer film material and its preparation process. Background Technology

[0002] Transfer film is an intermediate carrier that carries information patterns and is used to transfer them onto the printed item. It is a chemically elastic film that has been widely used in the packaging industry. Compared with traditional printing technology, transfer film has bright and dynamic colors and a certain degree of anti-counterfeiting.

[0003] Due to limitations in the manufacturing process and coating, during the lamination of transfer film and sheet paper into a single sheet of transfer paper, the friction between the paper surface and the back of the paper causes the paper surface to exhibit diffuse reflection instead of mirror reflection, a phenomenon commonly known in the industry as "sticking." This also makes the paper prone to scratches during stacking, sorting, and transportation, leading to this quality issue. Scratch-resistant and fold-resistant transfer paper requires the laminated paper surface to have good scratch and fold resistance. The coating must be both scratch-resistant and fold-resistant. The adhesive used in conjunction with this process cannot be too hard; higher hardness provides better scratch resistance but can also cause the paper to crack. Adhesive that is too soft will cause surface sticking and is not abrasion-resistant. Therefore, selecting a suitable adhesive and coating, and adjusting the coating amount and drying effect, allows the transferred paper surface to have appropriate flexibility to solve the problems of scratching and cracking. The key to solving these problems lies in using coatings that are both scratch-resistant and flexible, with excellent folding resistance and high toughness to prevent smudging. The coating film, adhesive, and paper combine to form a rollable, sheet-and-pasteable holographic anti-counterfeiting laser film that is scratch-resistant, folding-resistant, and smudge-proof. However, existing coatings of this type often have excessive formaldehyde and solvent residues, making it difficult to meet environmental protection requirements. Summary of the Invention

[0004] The purpose of this invention is to provide a scratch-resistant and fold-resistant transfer film material and its preparation process to solve the problems existing in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a scratch-resistant transfer film material, the film material comprising a polyethylene terephthalate base film layer, a scratch-resistant release coating disposed on the base film layer, a laser information layer disposed on the release coating, and an aluminum plating layer disposed on the laser information layer.

[0006] Furthermore, a method for preparing a scratch-resistant transfer film material includes the following preparation steps: (1) 55-77 parts by weight of deionized water, 2-8 parts by weight of ethylene glycol butyl ether, 0-3 parts by weight of propylene glycol ethyl ether, 1-4 parts by weight of n-butanol and 2-5 parts by weight of acetone are sequentially added to a stirred tank. The stirring device is turned on and stirred continuously to carry out preliminary mixing and dissolution. Then, while maintaining the stirring operation, 18-23 parts by weight of polyurethane resin and 2-6 parts by weight of waterborne acrylic resin are slowly and evenly added to the above mixture. After all the resin is added, the speed of the stirring device is increased and stirring is continued for 40-60 minutes to completely dissolve the resin particles and achieve a highly uniform dispersion in the liquid system, thereby forming a stable and uniform mixture. The stirring speed is adjusted to medium speed. Under this stirring condition, 1-5 parts by weight of aziridine crosslinking agent is slowly added dropwise to the mixture. After all the crosslinking agent has been added, stirring is continued for 15-30 minutes to obtain a waterborne release coating. (2) Polyethylene terephthalate film is selected as the carrier substrate. Before entering the coating station, the film needs to be pre-treated by an online corona treatment device for surface activation. The corona-treated film is installed on the unwinding shaft of the coating machine and the tension during the transmission process is precisely adjusted. Then, the water-based release coating prepared in the first step is uniformly transferred and coated on the film surface using a micro-gravure coating roller. By finely controlling the running speed of the coating roller and the viscosity parameters of the coating in the trough, a wet film is obtained. (3) The wet film after coating needs to be immediately introduced into a hot air circulating oven with segmented temperature zones for processing; the film passes through the entire oven at a constant speed, and its total residence time in the oven is 80-120s, of which the residence time in the oven area with a temperature higher than 120℃ is 40-60s; after this drying and curing process, the volatile components in the coating are completely released, and its dry coating amount should be 1.1-1.4g / m², and a semi-finished film is obtained. (4) The above-mentioned dried semi-finished film is introduced into a high-speed molding machine to complete the transfer of laser texture; (5) The molded roll of thin film material is loaded into the winding system of the vacuum coating machine; when the vacuum level in the coating chamber reaches 5.0 × 10⁻⁶, the film is coated with a film. -2 When the pressure reaches Pa, the evaporation source can be started; by precisely controlling the evaporation process parameters, the vaporized aluminum atoms are uniformly deposited on the thin film surface. (6) After vacuum evaporation, the product is subjected to necessary quality inspection procedures and then slit on the machine. During the slitting process, the winding tension should be set at 8-12 kg, and corresponding measures should be taken to maintain the tightness of the film roll and the neatness of the end face to obtain the finished transfer film.

[0007] Furthermore, in step (1), the dripping rate is 10 drops / min.

[0008] Furthermore, in step (2), the thickness of the polyethylene terephthalate film is 12 μm.

[0009] Furthermore, in step (2), the coating amount of the wet coating is 3.5-5.5 g / m².

[0010] Furthermore, in step (3), the temperatures of each zone of the oven are set at 70-100℃, 120-150℃, and 160-190℃, respectively.

[0011] Furthermore, in step (4), the temperature of the printing roller used for molding is set to 170-190℃.

[0012] Furthermore, the linear pressure applied to the film surface in step (4) is 35-45 kg.

[0013] Furthermore, in step (4), during the entire molding process, it is necessary to ensure that the unwinding tension is maintained at 16-20 kg and the rewinding tension is stable at 8-12 kg to ensure the smooth transport and winding of the film.

[0014] Furthermore, the thickness of the aluminum layer formed in step (5) is 350-450 Å.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are: This invention provides a scratch-resistant and fold-resistant transfer film material based on the blending of rigid components and flexible resins, and intermolecular cross-linking reinforcement. The coating uses waterborne polyurethane resin as the main film-forming material, while incorporating a specific proportion of high-hardness waterborne acrylic resin. After blending, the rigid segments of the acrylic resin form dispersed reinforcing regions within the flexible polyurethane matrix, giving the cured coating both deformation-resistant hardness and stress-absorbing elasticity. Furthermore, an environmentally friendly cross-linking agent is introduced into the coating formulation. This agent reacts chemically with the active functional groups on the resin molecular chains during baking, constructing a stable three-dimensional bonded structure within the coating, thereby enhancing the coating's cohesive strength and overall durability. The addition of acrylic resin improves the coating's surface hardness and abrasion resistance; tests show that its scratch resistance can be improved by approximately 46%. Simultaneously, the combined effect of the polyurethane matrix and the cross-linked structure allows the polymer segments to disperse stress through recoverable elastic deformation during repeated bending, effectively suppressing brittle fracture and surface whitening, thus balancing scratch resistance and fold resistance. The cross-linked structure further enhances the density of the coating, making it more resistant to solvents and heat in subsequent processing, thus ensuring the clarity of the laser pattern and the gloss of the aluminum plating layer.

[0016] In terms of environmental friendliness, this solution uses aziridines as crosslinking aids, which are formaldehyde-free and have low volatile organic compound (VOC) content. Under appropriate baking processes, the crosslinking reaction is complete, effectively controlling the residue of unreacted monomers and volatile byproducts. The final product meets stringent solvent residue limits and is suitable for packaging applications with high safety requirements. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention. Example 1

[0018] (1) 55 parts by weight of deionized water, 2 parts by weight of ethylene glycol butyl ether, 0 parts by weight of propylene glycol ethyl ether, 1 part by weight of n-butanol, and 2 parts by weight of acetone were sequentially added to a stirred tank. The stirring device was turned on, and the speed was set to 150 rpm. The stirring was continued for 8 minutes to ensure that the various alcohols and ketones could be fully mixed and miscible with the water. Then, while maintaining the stirring, 18 parts by weight of polyurethane resin and 2 parts by weight of waterborne acrylic resin were slowly and evenly added to the above mixture. After all the resins were added... Then, the stirring speed of the agitator was increased to 550 rpm and stirred continuously for 40 minutes. This process aims to completely dissolve the resin particles and achieve a highly uniform dispersion in the liquid system, thereby forming a stable and homogeneous mixture. The stirring speed was then adjusted to a medium speed of 350 rpm. Under this stirring condition, 1 part by weight of aziridine crosslinking agent was slowly added to the mixture at a rate of 10 drops / min. The addition process should be carried out smoothly. After all the crosslinking agent has been added, the stirring speed was maintained for another 15 minutes to obtain the water-based release coating. (2) A 12μm thick polyethylene terephthalate film is selected as the carrier substrate. Before entering the coating station, the film needs to be pre-treated by an online corona treatment device for surface activation. The corona-treated film is installed on the unwinding shaft of the coating machine, and the tension during its transmission is precisely adjusted. Then, the water-based release coating prepared in the first step is uniformly transferred and coated on the film surface using a micro-gravure coating roller. By finely controlling the running speed of the coating roller and the viscosity parameters of the coating in the trough, the coating amount of the wet coating is 3.5g / m², and a wet film is obtained. (3) The wet film after coating needs to be immediately introduced into a hot air circulating oven with segmented temperature zones for processing; the temperature of each zone of the oven is set at 70℃, 120℃ and 160℃ respectively; the film passes through the entire oven at a constant speed, and its total residence time in the oven is 80s, of which the residence time in the oven zone with a temperature higher than 120℃ is 40s; after this drying and curing process, the volatile components in the coating are completely released, and its dry coating amount should be 1.1g / m², and a semi-finished film is obtained. (4) The above-mentioned dried semi-finished film is introduced into a high-speed molding machine; the temperature of the molding roller is set to 170°C, and a linear pressure of 35kg is applied to the film surface to complete the transfer of laser texture; throughout the molding process, it is necessary to ensure that the unwinding tension is maintained at 16kg and the rewinding tension is stable at 8kg to ensure the flat conveying and winding of the film. (5) The molded roll of thin film material is loaded into the winding system of the vacuum coating machine; when the vacuum level in the coating chamber reaches 5.0 × 10⁻⁶, the film is coated with a film. -2 When Pa, the evaporation source can be started; by precisely controlling the evaporation process parameters, the vaporized aluminum atoms are uniformly deposited on the thin film surface, and the resulting aluminum layer has a thickness of 350 Å. (6) After the vacuum-deposited product has undergone the necessary quality inspection procedures, it is then slit on the machine. During the slit process, the winding tension should be set at 8 kg, and corresponding measures should be taken to maintain the tightness of the film roll and the neatness of the end face to obtain the finished transfer film. Example 2

[0019] (1) 66 parts by weight of deionized water, 5 parts by weight of ethylene glycol butyl ether, 1.5 parts by weight of propylene glycol ethyl ether, 2.5 parts by weight of n-butanol, and 3.5 parts by weight of acetone were sequentially added to a stirred tank. The stirring device was turned on, and the speed was set to 200 rpm. The mixture was stirred continuously for 11.5 min to ensure that the various alcohols and ketones could be fully mixed and miscible with the water. Subsequently, while maintaining the stirring, 20.5 parts by weight of polyurethane resin and 4 parts by weight of waterborne acrylic resin were slowly and evenly added to the above mixture. After the resin is added, the stirring speed is increased to 700 rpm and stirred continuously for 50 minutes. This process aims to completely dissolve the resin particles and achieve a highly uniform dispersion in the liquid system, thereby forming a stable and homogeneous mixture. The stirring speed is then adjusted to a medium speed of 400 rpm. Under this stirring condition, 3 parts by weight of aziridine crosslinking agent are slowly added to the mixture at a rate of 10 drops / min. The addition process should be carried out smoothly. After all the crosslinking agent has been added, the stirring speed is maintained for another 22.5 minutes to obtain the water-based release coating. (2) A 12μm thick polyethylene terephthalate film is selected as the substrate. Before entering the coating station, the film needs to be pre-treated by an online corona treatment device for surface activation. The corona-treated film is installed on the unwinding shaft of the coating machine, and the tension during the transmission process is precisely adjusted. Then, the water-based release coating prepared in the first step is uniformly transferred and coated on the film surface using a micro-gravure coating roller. By finely controlling the running speed of the coating roller and the viscosity parameters of the coating in the trough, the coating amount of the wet coating is 4.5g / m², and a wet film is obtained. (3) The wet film after coating needs to be immediately introduced into a hot air circulating oven with segmented temperature zones for processing; the temperature of each zone of the oven is set at 85℃, 135℃ and 175℃ respectively; the film passes through the entire oven at a constant speed, and its total residence time in the oven is 100s, of which the residence time in the oven zone with a temperature higher than 120℃ is 50s; after this drying and curing process, the volatile components in the coating are completely released, and its dry coating amount should be 1.25g / m², and a semi-finished film is obtained. (4) The above-mentioned dried semi-finished film is introduced into a high-speed molding machine; the temperature of the molding roller is set to 180°C, and a linear pressure of 40kg is applied to the film surface to complete the transfer of laser texture; throughout the molding process, it is necessary to ensure that the unwinding tension is maintained at 18kg and the rewinding tension is stable at 10kg to ensure the flat conveying and winding of the film. (5) The molded roll of thin film material is loaded into the winding system of the vacuum coating machine; when the vacuum level in the coating chamber reaches 5.0 × 10⁻⁶, the film is coated with a film. -2 When Pa, the evaporation source can be started; by precisely controlling the evaporation process parameters, the vaporized aluminum atoms are uniformly deposited on the thin film surface, and the resulting aluminum layer has a thickness of 400 Å. (6) After the vacuum-deposited product has undergone the necessary quality inspection procedures, it is then slit on the machine. During the slit process, the winding tension should be set at 10 kg, and corresponding measures should be taken to maintain the tightness of the film roll and the neatness of the end face to obtain the finished transfer film. Example 3

[0020] (1) 77 parts by weight of deionized water, 8 parts by weight of ethylene glycol butyl ether, 3 parts by weight of propylene glycol ethyl ether, 4 parts by weight of n-butanol, and 5 parts by weight of acetone were sequentially added to a stirred tank. The stirring device was turned on, and the speed was set to 250 rpm. The stirring was continued for 15 minutes to ensure that the various alcohols and ketones could be fully mixed and miscible with the water. Then, while maintaining the stirring, 23 parts by weight of polyurethane resin and 6 parts by weight of waterborne acrylic resin were slowly and evenly added to the above mixture. After all the resins were added... After the initial stirring is complete, the stirring speed is increased to 850 rpm and stirred continuously for 60 minutes. This process aims to completely dissolve the resin particles and achieve a highly uniform dispersion in the liquid system, thereby forming a stable and homogeneous mixture. The stirring speed is then adjusted to a medium speed of 450 rpm. Under this stirring condition, 5 parts by weight of aziridine crosslinking agent are slowly added to the mixture at a rate of 10 drops / min. The addition process must be carried out smoothly. After all the crosslinking agent has been added, the stirring speed is maintained for another 30 minutes to obtain the water-based release coating. (2) A 12μm thick polyethylene terephthalate film is selected as the carrier substrate. Before entering the coating station, the film needs to be pre-treated by an online corona treatment device for surface activation. The corona-treated film is installed on the unwinding shaft of the coating machine, and the tension during its transmission is precisely adjusted. Then, the water-based release coating prepared in the first step is uniformly transferred and coated on the film surface using a micro-gravure coating roller. By finely controlling the running speed of the coating roller and the viscosity parameters of the coating in the trough, the coating amount of the wet coating is 5.5g / m², and a wet film is obtained. (3) The wet film after coating needs to be immediately introduced into a hot air circulating oven with segmented temperature zones for processing; the temperature of each zone of the oven is set at 100℃, 150℃ and 190℃ respectively; the film passes through the entire oven at a constant speed, and its total residence time in the oven is 120s, of which the residence time in the oven zone with a temperature higher than 120℃ is 60s; after this drying and curing process, the volatile components in the coating are completely released, and its dry coating amount should be 1.4g / m², and a semi-finished film is obtained. (4) The above-mentioned dried semi-finished film is introduced into a high-speed molding machine; the temperature of the molding roller is set to 190°C, and a linear pressure of 45kg is applied to the film surface to complete the transfer of laser texture; throughout the molding process, it is necessary to ensure that the unwinding tension is maintained at 20kg and the rewinding tension is stable at 12kg to ensure the flat conveying and winding of the film. (5) The molded roll of thin film material is loaded into the winding system of the vacuum coating machine; when the vacuum level in the coating chamber reaches 5.0 × 10⁻⁶, the film is coated with a film. -2When Pa, the evaporation source can be started; by precisely controlling the evaporation process parameters, the vaporized aluminum atoms are uniformly deposited on the thin film surface, and the resulting aluminum layer has a thickness of 450 Å. (6) After the vacuum-deposited product has undergone the necessary quality inspection procedures, it is then slit on the machine. During the slit process, the winding tension should be set at 12 kg, and corresponding measures should be taken to maintain the tightness of the film roll and the neatness of the end face to obtain the finished transfer film.

[0021] Comparative Example 1 The difference between Comparative Example 1 and Example 2 lies in step (1). Step (1) is changed as follows: 66 parts by weight of ethyl acetate, 5 parts by weight of ethylene glycol butyl ether, 1.5 parts by weight of propylene glycol ethyl ether, 2.5 parts by weight of n-butanol and 3.5 parts by weight of acetone are sequentially added to a stirred tank. The stirring device is turned on and the speed is set to 200 rpm. The stirring is continued for 11.5 min. Then, 20.5 parts by weight of solvent-based polyurethane resin and 4 parts by weight of solvent-based acrylic resin are added to the system while stirring. After the addition is completed, the speed is increased to 700 rpm and the stirring is continued for 50 min to form a homogeneous mixture. Finally, 3 parts by weight of polyisocyanate crosslinking agent are added dropwise to the mixture at a speed of 400 rpm at a dropping rate of 10 drops / min. After the addition is completed, the stirring is continued for 22.5 min to obtain the coating. The remaining steps are the same as in Example 2.

[0022] Comparative Example 2 The difference between Comparative Example 2 and Example 2 lies in step (1). Step (1) is changed as follows: 66 parts by weight of deionized water, 5 parts by weight of ethylene glycol butyl ether, 1.5 parts by weight of propylene glycol ethyl ether, 2.5 parts by weight of n-butanol and 3.5 parts by weight of acetone are added to the stirred tank in sequence, the stirring device is turned on, the speed is set to 200 rpm, and the stirring is continued for 11.5 min; then, 20.5 parts by weight of polyurethane resin and 4 parts by weight of waterborne acrylic resin are added to the system while stirring; after the materials are added, the speed is increased to 700 rpm and the stirring is continued for 50 min to obtain the coating; the remaining steps are the same as in Example 2.

[0023] Comparative Example 3 The difference between Comparative Example 3 and Example 2 lies in step (1). Step (1) is changed as follows: 66 parts by weight of deionized water, 5 parts by weight of ethylene glycol butyl ether, 1.5 parts by weight of propylene glycol ethyl ether, 2.5 parts by weight of n-butanol and 3.5 parts by weight of acetone are sequentially added to a stirred tank. The stirring device is turned on and the speed is set to 200 rpm. The stirring is continued for 11.5 min. Then, under stirring, 28.5 parts by weight of polyurethane resin and 1.0 part by weight of waterborne acrylic resin are slowly added to the above mixture. After the addition is completed, the stirring speed is increased to 700 rpm and the stirring is continued for 50 min. After that, 3 parts by weight of aziridine crosslinking agent are added dropwise to the mixture at a speed of 400 rpm at a dropping rate of 10 drops / min. After the dropping is completed, the stirring is continued for 22.5 min to obtain the coating. The remaining steps are the same as in Example 2.

[0024] Comparative Example 4 The difference between Comparative Example 4 and Example 2 lies in step (3). Step (3) is changed to: the coated wet film is introduced into the oven, and the temperature of each zone of the oven is 70℃, 110℃ and 150℃; the total residence time of the film is 70s, of which the residence time in the area with a temperature higher than 120℃ is 20s; after drying, the dry coating amount is 1.25g / m²; the remaining steps are the same as in Example 2.

[0025] Example of effect Table 1 below shows the performance analysis results of a scratch-resistant transfer film material using Examples 1 to 3 and Comparative Examples 1 to 4 of the present invention.

[0026] Table 1

[0027] A comparison of the experimental data on the coefficient of kinetic friction between the examples and comparative examples reveals that the present invention, through the blending and compounding of waterborne polyurethane resin and high-hardness waterborne acrylic resin, combined with an environmentally friendly crosslinking agent to form a stable three-dimensional bond structure, results in a denser and smoother coating surface, achieving a significant reduction in the coefficient of surface friction. This helps to reduce adhesion during actual bonding and stacking processes. A comparison of the experimental data on surface hardness between the examples and comparative examples reveals that the present invention incorporates a specific proportion of high-hardness waterborne acrylic resin as a rigidity reinforcing component, and under the action of the crosslinking agent, forms a stable composite structure with the flexible polyurethane matrix, resulting in excellent surface hardness of the coating. A comparison of the experimental data on glossiness between the examples and comparative examples reveals that the present invention, benefiting from a sufficient crosslinking reaction and a dense coating structure, as well as the good film-forming and leveling properties provided by the optimized resin formulation, exhibits excellent optical properties on the coating surface, thereby ensuring high clarity of the laser pattern and high reflective gloss of the aluminum plating layer. A comparison of the tensile strength experimental data of the examples and comparative examples reveals that the present invention, through the construction of a three-dimensional network between resin molecular chains by an environmentally friendly crosslinking agent, greatly enhances the cohesive strength and integrity of the coating, enabling the material to possess higher mechanical load-bearing capacity and effectively improving coating durability and resistance to deformation and stress damage.

[0028] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No markings in the claims should be construed as limiting the scope of the claims.

Claims

1. A scratch- and fold-resistant transfer film material, characterized in that, The membrane material includes a polyethylene terephthalate (PET) base film layer, a scratch-resistant release coating disposed on the base film layer, a laser information layer disposed on the release coating, and an aluminum plating layer disposed on the laser information layer.

2. A method for preparing a scratch-resistant and fold-resistant transfer film material, characterized in that, The preparation steps include the following: (1) 55-77 parts by weight of deionized water, 2-8 parts by weight of ethylene glycol butyl ether, 0-3 parts by weight of propylene glycol ethyl ether, 1-4 parts by weight of n-butanol and 2-5 parts by weight of acetone are sequentially added to a stirred tank. The stirring device is turned on and the mixture is stirred continuously to carry out preliminary mixing and dissolution. Then, while maintaining the stirring operation, 18-23 parts by weight of polyurethane resin and 2-6 parts by weight of waterborne acrylic resin are slowly and evenly added to the above mixture. After all the resin has been added, increase the speed of the stirring device and continue stirring for 40-60 minutes to completely dissolve the resin particles and achieve a highly uniform dispersion in the liquid system, thereby forming a stable and homogeneous mixture. Adjust the stirring speed to medium speed, and under this stirring condition, slowly add 1-5 parts by weight of aziridine crosslinking agent to the mixture. After all the crosslinking agent has been added, continue stirring for 15-30 minutes to obtain the water-based release coating. (2) Polyethylene terephthalate film is selected as the carrier substrate. Before entering the coating station, the film needs to be pre-treated by an online corona treatment device for surface activation. The corona-treated film is installed on the unwinding shaft of the coating machine and the tension during the transmission process is precisely adjusted. Then, the water-based release coating prepared in the first step is uniformly transferred and coated on the film surface using a micro-gravure coating roller. By finely controlling the running speed of the coating roller and the viscosity parameters of the coating in the trough, a wet film is obtained. (3) The wet film after coating needs to be immediately introduced into a hot air circulating oven with segmented temperature zones for processing; the film passes through the entire oven at a constant speed, and its total residence time in the oven is 80-120s, of which the residence time in the oven area with a temperature higher than 120℃ is 40-60s; after this drying and curing process, the volatile components in the coating are completely released, and its dry coating amount should be 1.1-1.4g / m², and a semi-finished film is obtained. (4) The above-mentioned dried semi-finished film is introduced into a high-speed molding machine to complete the transfer of laser texture; (5) The molded roll of thin film material is loaded into the winding system of the vacuum coating machine; when the vacuum level in the coating chamber reaches 5.0 × 10⁻⁶, the film is coated with a film. -2 When the pressure reaches Pa, the evaporation source can be started; by precisely controlling the evaporation process parameters, the vaporized aluminum atoms are uniformly deposited on the thin film surface. (6) After vacuum evaporation, the product is subjected to necessary quality inspection procedures and then slit on the machine. During the slitting process, the winding tension should be set at 8-12 kg, and corresponding measures should be taken to maintain the tightness of the film roll and the neatness of the end face to obtain the finished transfer film.

3. The method for preparing a scratch-resistant and fold-resistant transfer film material according to claim 2, characterized in that, The dripping rate in step (1) is 10 drops / min.

4. The method for preparing a scratch-resistant and fold-resistant transfer film material according to claim 2, characterized in that, The thickness of the polyethylene terephthalate film in step (2) is 12 μm.

5. The method for preparing a scratch-resistant and fold-resistant transfer film material according to claim 2, characterized in that, In step (2), the amount of wet coating applied is 3.5-5.5 g / m².

6. The method for preparing a scratch-resistant and fold-resistant transfer film material according to claim 2, characterized in that, In step (3), the temperatures of each zone of the oven are set at 70-100℃, 120-150℃ and 160-190℃ respectively.

7. The method for preparing a scratch-resistant and fold-resistant transfer film material according to claim 2, characterized in that, In step (4), the temperature of the printing roller used for molding is set to 170-190℃.

8. The method for preparing a scratch-resistant and fold-resistant transfer film material according to claim 2, characterized in that, The linear pressure applied to the film surface in step (4) is 35-45 kg.

9. The method for preparing a scratch-resistant and fold-resistant transfer film material according to claim 2, characterized in that, In step (4), during the entire molding process, it is necessary to ensure that the unwinding tension is maintained at 16-20 kg and the rewinding tension is stable at 8-12 kg to ensure the smooth transport and winding of the film.

10. The method for preparing a scratch-resistant transfer film material according to claim 2, characterized in that, The thickness of the aluminum layer formed in step (5) is 350-450 Å.

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