A high-stretch 3D out-of-mold transfer film and its preparation method

Abstract

The present application relates to a high-strength 3D out-of-mold forming transfer film and a preparation method thereof, including a preparation method of a transfer film body, wherein the preparation method of the transfer film body comprises the following steps: preparation of a base film layer, preparation of a release layer, preparation of a texture layer, preparation of a hardening layer, preparation of a pattern printing layer, preparation of an adhesive layer, and preparation of a release film. The layered structure of the prepared transfer film body comprises, from bottom to top, a base film layer, a release layer, a texture layer, a hardening layer, a pattern printing layer, an adhesive layer, and a release film. The hardening layer of the transfer film body adopts a special modified polyurethane acrylate prepolymer, nano-wear-resistant particles and thermoplastic acrylic resin so that the prepared hardening liquid not only has good hardness, but also has good finger-drying properties, no cracking when stretched, an elongation of more than 300% at room temperature, and good hardness and wear resistance after light curing. The present application has the effects of high-strength forming without cracking, good hardness and wear resistance.

Description

Technical Field

[0001] The present application relates to the field of transfer films, and in particular to a high-stretch 3D out-of-mold transfer film and a preparation method thereof. Background Art

[0002] At present, there are many varieties of decorative films on the market, and the application scenarios are also different. However, the decorative films used in the field of surface decoration of special-shaped plastic parts and metal parts are still in the era of water coating transfer. During the implementation of the water coating process, activators - the main components of which are ketone and ester solvents - must be sprayed into the water, thereby generating wastewater, which has a certain impact on the environment and aquatic organisms, and has poor tensile properties.

[0003] Overseas, there is a related technology for over-mold transfer films, abbreviated as OMD in English. Various protective coatings, decorative coatings, and adhesives are applied and printed on a thin film. The film is heated and stretched using specific equipment and then adhered to the surface of a special-shaped workpiece under vacuum pressure to achieve the purpose of decoration. Due to the process characteristics of OMD, the functional coating used must have a certain hardness and a stretchability of approximately 300%, and the adhesive must have both low-temperature rapid activation and excellent edge trimming properties. However, overseas countries have a strict blockade against this technology.

[0004] With respect to the above-mentioned related technologies, the inventors believe that domestic decorative films have the defect of poor tensile properties. Summary of the Invention

[0005] In order to improve the tensile properties of a decorative film, the present application provides a high-stretch 3D out-of-mold transfer film and a preparation method thereof.

[0006] In a first aspect, the present application provides a method for preparing a high-stretch 3D out-of-mold transfer film, which adopts the following technical solution:

[0007] A method for preparing a high-stretch 3D out-of-mold transfer film includes a method for preparing a transfer film body. The method for preparing the transfer film body sequentially comprises preparing a base film layer, preparing a release layer, preparing a texture layer, preparing a hardening layer, preparing a pattern printing layer, preparing an adhesive layer, and preparing a release film. The specific preparation steps are as follows:

[0008] S1. Preparation of base film layer: The base film layer is made of any one of polyolefin film, cast polypropylene film, polycarbonate film, non-crystalline copolyester, polyvinyl chloride film, and polymethyl methacrylate film;

[0009] S2. Preparation of release layer: Preparation of the release layer: dissolving OP wax in any one of xylene, S-150 solvent oil, toluene, n-heptane, and methylcyclohexane, or any mixed solvent thereof, to form a release agent, wherein the solid content of OP wax in the release agent is configured to be 1%-10%;

[0010] S3, coating the release agent of the release layer 200 obtained in step S2 on the upper surface of the base film layer obtained in step S1, and drying it with hot air to form the release layer;

[0011] S4. Preparation of the texture layer (300): The texture layer (300) is formed by hot pressing the surface of the release film obtained in step S3 using a hot pressing roller.

[0012] S5. Preparation of a hardened layer: The hardening liquid used for the hardened layer comprises, by weight, 30-50 parts of acrylic resin, 30-50 parts of polyurethane acrylate prepolymer, 1-30 parts of photocurable monomer, 5-10 parts of nano-wear-resistant material, 0.3-0.8 parts of ultraviolet absorber, 5-7 parts of photoinitiator, 0.5-1 parts of antioxidant, 0.2-0.5 parts of dispersant, and 30-80 parts of mixed solvent to form a hardening liquid;

[0013] After the hardening liquid hardens, a hardened layer is formed, and the hardened layer is covered on the upper surface of the texture layer obtained in step S4;

[0014] S6. Preparation of a pattern printing layer: The pattern printing layer is prepared by gravure printing using an ink with polyurethane as a binder. The pattern printing layer is located on the upper surface of the hardened layer 400 obtained in S5.

[0015] S7. Preparation of adhesive layer: The adhesive components used in the adhesive layer include, by weight, 10-50 parts of acrylic resin, 30-60 parts of polyurethane acrylate prepolymer, 1-30 parts of photocurable monomer, 5-7 parts of photoinitiator, and 50-70 parts of mixed solvent;

[0016] The obtained adhesive layer is coated on the upper surface of the pattern printing layer obtained in step S6;

[0017] S8. Preparation of release film: The release film is prepared by coating polysiloxane on the surface of a substrate of PP or PE to form a release film, and the obtained release film is coated on the upper surface of the adhesive layer obtained in step S7.

[0018] By adopting the above technical scheme, the transfer film adopts the preparation steps of a layered structure, including the preparation of a base film layer, a release layer, a texture layer, a hardening layer, a pattern printing layer, an adhesive layer and a release film. The 3D out-of-mold transfer film body generated by the above technical scheme has multiple functions and performances, and uses specific materials and hierarchical structures to maintain its shape and performance. The hardening layer includes nano-wear-resistant materials to increase the wear resistance of the film. Photocurable monomers and photoinitiators are used to achieve rapid hardening and fixation of the pattern printing layer and the adhesive layer. The ink pattern printing layer uses polyurethane as a connecting material and has strong adhesion. Photocuring technology is used in the preparation process to reduce the emission of volatile organic compounds, which is beneficial to environmental protection, so that the transfer film body has the advantages of multi-layer structure, high stretchability, wear resistance, wide applicability, high efficiency and environmental protection.

[0019] Preferably, the release layer is formulated with 20-40 parts of solid hydroxy acrylic resin, 20-30 parts of toluene, 20-30 parts of butanone, 10-20 parts of ethyl acetate, 10-20 parts of isocyanate, and 3-10 parts of a silicon-containing additive. The above materials are dissolved in a solvent and mixed and dispersed evenly. The materials are then coated on the base film layer 100 using a micro-gravure coating, dried with hot air, and then matured at 60°C for 24 hours.

[0020] By adopting the above technical solution, the solid hydroxy acrylic resin has excellent adhesion properties, which helps to form a strong release layer on the base film layer, thereby improving the stability and durability of the membrane. The use of various organic solvents such as toluene, butanone, ethyl acetate, isocyanate, etc. can effectively dissolve and disperse the solid hydroxy acrylic resin, so that the release agent is evenly distributed and fully dissolved. After hot air drying, it is then heat-cured at 60°C for 24 hours, which helps to completely cure and stabilize the release layer. The addition of silicon-containing additives helps to improve the anti-adhesion and chemical corrosion resistance of the release layer. Through uniform mixing and dispersion, the various components in the release agent are evenly distributed, thereby improving the performance of the release layer and improving the adhesion, heat resistance, chemical corrosion resistance and other properties of the release layer as a whole, making the membrane suitable for high-stretch 3D mold forming.

[0021] Preferably, the release agent components of the release layer include, by weight: 5-10 parts of OP wax, 40-50 parts of xylene, and 30-50 parts of S-150 solvent oil;

[0022] The preparation method of the release agent is as follows:

[0023] Pour the prepared mixed solvent A into the dissolving kettle and heat to 90°C while dispersing;

[0024] In the B dissolving kettle, the mixed solvent is dispersed while adding OP wax powder;

[0025] C. Add OP wax powder to the mixed solvent and keep it at 90℃ for 2-3 hours until the OP wax powder is completely dissolved in the mixed solvent and then cool it to room temperature;

[0026] D. Filter and discharge the material for filling.

[0027] By adopting the above technical solution, the release agent components include OP wax, xylene and S-150 solvent oil, which have a synergistic effect and help form an efficient release layer. By dissolving at 90°C, OP wax can be quickly dissolved in the mixed solvent, thereby ensuring the uniformity and consistency of the release agent.

[0028] The heat preservation step can fully dissolve the OP wax and improve the quality of the prepared release layer. The OP wax in the release agent has excellent release performance, which can effectively separate the diaphragm from the mold and improve the success rate of 3D mold forming. The step of filtering the material out is used to remove impure substances. The preparation method of the release agent helps to prepare an efficient release layer, improve the preparation quality of the diaphragm, reduce the preparation cost, and improve production efficiency.

[0029] Preferably, in the production of the texture layer, the base film layer coated with the release agent is placed on the unwinding mechanism, the texture pressing roller is heated to 120-150°C, the base film layer coated with the release agent is unrolled and moved to the position below the texture roller, the texture roller is pressed tightly against the surface of the base film layer coated with the release agent, and the texture roller is forced to cool and then reeled, the texture film is formed, and the texture layer covering the upper surface of the base film layer is completed.

[0030] By adopting the above technical solution, the release agent is coated on the base film layer, and after heating and pressure treatment, the texture layer is integrally formed on the base film layer to achieve texture uniformity and fit. The texture pressing roller is heated to 120-150°C. When preparing the texture layer, the temperature is in an appropriate range, which is conducive to texture formation and quality control. The pressing and forced air cooling of the texture roller contribute to the quality and consistency of the texture, avoid the generation of bubbles and defects, and improve the overall appearance of the membrane. The preparation process of the texture layer is relatively automated, which improves production efficiency and reduces preparation costs. The temperature, pressure and speed are precisely controlled during the preparation process to ensure that the texture layer of each membrane has consistent characteristics.

[0031] Preferably, the hardening liquid used for the hardened layer is composed of 30-50 parts of acrylic resin, 30-50 parts of polyurethane acrylate prepolymer, 1-30 parts of photocurable monomer, 5-10 parts of nano wear-resistant material, 0.3-0.8 parts of ultraviolet absorber, 5-7 parts of photoinitiator, 0.5-1 parts of antioxidant, 0.2-0.5 parts of dispersant, and 30-80 parts of mixed solvent in parts by weight;

[0032] The acrylic resin uses a resin with a glass transition temperature of 70-120°C and a molecular weight of 50,000-200,000;

[0033] Polyurethane acrylate prepolymer is a resin with a functionality of 3-9;

[0034] The photocurable monomer is any one or a combination of pentaerythritol triacrylate, ethoxylated pentaerythritol tetraacrylate, and tricyclodecane dimethanol diacrylate;

[0035] The nano wear-resistant material includes any one or a combination of nano alumina, nano alumina dispersion, silicon nitride, nano diamond, glass powder, and POSS;

[0036] The photoinitiator is any one or a combination of 1-hydroxycyclohexyl phenyl ketone, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, and methyl benzoylformate;

[0037] The ultraviolet absorber is any one or a combination of benzotriazoles and triazines;

[0038] The antioxidant is any one or a combination of high molecular weight hindered phenol antioxidants and phosphite antioxidants;

[0039] The dispersant is any one of BYK163, BYK110, BYK111, and EFKA4061, or a combination of several of them.

[0040] By adopting the above technical solution, the hardened layer contains nano-wear-resistant materials to increase the wear resistance of the hardened layer and make it more durable. The photocuring monomers and photoinitiators are quickly photocured by ultraviolet irradiation, so that the hardened layer becomes strong in a short time, accelerating the production and processing process. The acrylic resin in the hardened layer has a high glass transition temperature and can maintain stability in high temperature environments, making it suitable for applications with high temperature requirements. The antioxidant in the hardening liquid improves the antioxidant properties of the hardened layer and extends its service life. The use of dispersants helps to evenly disperse the various components in the hardened layer and achieve consistency in coating quality.

[0041] Preferably, the curing liquid is a stretchable UV curing liquid, and the preparation method of the curing liquid is as follows:

[0042] a. The acrylic resin was dissolved in ethyl ester to form a resin solution containing 40% solids A for standby;

[0043] b. The nanomaterial, ethyl ester and dispersant are uniformly mixed and ground with a nano-horizontal sand mill to form a mixed solution B with a particle size of ≤100 nm;

[0044] c. Add UV monomer, UV absorber, photoinitiator, antioxidant to resin liquid A and disperse at high speed for 1-2 hours at a speed of not less than 1500 rpm to form mixed liquid C.

[0045] d. Mix the mixed solution B and the mixed solution C to form a mixed solution D.

[0046] e. Add the polyurethane acrylate prepolymer to the mixed solution D and evenly disperse it at medium speed, 500-800 rpm, for 30 minutes. After mixing, it becomes a stretchable UV curable liquid.

[0047] f1. Apply the stretchable UV curing solution prepared in steps a to e to the surface of the release layer using an anilox roller, comma roller, or slit process. Set the target thickness. After drying the solvent in an oven, form a touch-dry hardened layer 400. The hardened layer 400 is then laminated to the protective film and rolled up for later use.

[0048] f2. The stretchable UV curing liquid prepared in steps a to e above is applied to the surface of the texture layer 3 using an anilox roller, comma roller, and slit process. The target thickness is set. After the solvent is dried in an oven, a touch-dry hardened layer 400 is formed. The hardened layer 400 is then laminated to the protective film and rolled up for later use.

[0049] By adopting the above technical scheme, the composition and preparation steps of the stretchable UV curing liquid, the stretchable UV curing layer is suitable for surface coating of the release layer and the texture layer to form a thin film layer with specific properties, the curing liquid adopts UV curing technology to achieve rapid curing, and provides excellent wear resistance and scratch resistance. The components and formula in the curing liquid are applied on the stretchable surface and can adapt to applications that require stretching or deformation. Grinding nanomaterials to achieve uniform particle size distribution helps to obtain high-quality thin film coatings and reduce particle aggregation and defects. The nano wear-resistant materials added to the curing liquid are beneficial to enhance the wear resistance of the film. Photoinitiators and ultraviolet absorbers help control the curing process, ensure uniform hardening, provide UV protection, and prevent film aging and fading. By adjusting the proportion of different components in the curing liquid, the film properties can be adjusted to meet the requirements of specific applications, and the process is controllable.

[0050] Preferably, the acrylic resin is a resin with a glass transition temperature of 40-80°C and a molecular weight of 50,000-100,000, and the resin is any one of BM60, 64 / 12N, P24N, 66 / 02N, MB319, and MB-3015, or a combination of any several of them; the polyurethane acrylic prepolymer uses a resin with a functionality of 2-3, and the resin is any one of CN991, U384, 8413, SD7866, and SD8602, or a combination of any several of them.

[0051] By adopting the above-mentioned technical scheme, the preparation method of the adhesive layer and the composition and formula of the adhesive layer, the proportion of different components in the adhesive is adjusted to achieve the regulation of the adhesive properties to meet the requirements of specific applications, and different types of acrylic resins and polyurethane acrylate prepolymers are selected to adjust the performance of the adhesive layer, the composition of the photocurable monomer and the photoinitiator, to achieve rapid photocuring, improve efficiency, reduce the emission of volatile organic compounds (VOCs), reduce environmental pollution, and use polyurethane acrylate prepolymers to improve the adhesion performance of the adhesive layer. The preparation method includes clear steps to achieve controllability of the production process and achieve consistency and quality of the adhesive layer.

[0052] Preferably, the photocurable monomer includes pentaerythritol triacrylate, 1.6 hexanediol acrylate, tripropylene glycol acrylate, cyclotrimethylolpropane formal acrylate, tetrahydrofurfuryl acrylate, and dicyclopentenyl acrylate. The photocurable monomer is any one of pentaerythritol triacrylate, 1.6 hexanediol acrylate, tripropylene glycol acrylate, cyclotrimethylolpropane formal acrylate, tetrahydrofurfuryl acrylate, and dicyclopentenyl acrylate, or any combination of several of them.

[0053] By adopting the above technical solution, a variety of different types of monomers are used in the photocurable monomer to achieve diversified adjustment of coating properties to meet the needs of different applications. The photocurable monomer is suitable for UV light curing technology, achieves rapid curing, improves production efficiency, and has wide applicability. By selecting and adjusting different types and proportions of monomers in the photocurable monomer, the hardness, adhesion, and light transmittance of the coating can be adjusted, and the demand for organic solvents can be reduced, thereby reducing environmental and health risks.

[0054] Preferably, the initiator includes any one of 1-hydroxycyclohexyl phenyl ketone, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, and methyl benzoylformate, or any combination of several of them.

[0055] By adopting the above technical solution, the initiator starts the light curing process under the action of UV light.

[0056] Different types of photoinitiators are used selectively for different types of photocuring applications to adapt to different needs, to achieve the adjustment of the photosensitivity and reaction rate of the coating, suitable for UV light curing, to achieve rapid curing reaction, and enhance the stability of the coating. Consistent performance can be obtained during the photocuring process, which helps the coating to fully cure under UV light while maintaining optical transparency.

[0057] In a second aspect, the present application provides a high-strength 3D out-of-mold transfer film, which adopts the following technical solution:

[0058] A high-stretch 3D out-of-mold forming transfer film includes a transfer film body. The layered structure of the transfer film body is, from bottom to top, a base film layer, a release layer, a texture layer, a hardening layer, a pattern printing layer, an adhesive layer, and a release film. The transfer film body is produced using a preparation method for a high-stretch 3D out-of-mold forming transfer film.

[0059] By adopting the above technical solution, the layered structure of the transfer film body has multiple layers, each of which has different functions. The base film layer provides structural support for the film, acts as a bottom layer, and supports the upper coating, usually with mechanical strength, flatness and stability. The release layer acts as a separation layer to protect and separate the pattern printing layer. The pattern can be transferred to the target surface during the transfer process while avoiding adhesion. The texture layer includes a layer with a specific texture, pattern or texture, which is used to simulate or replicate the required surface texture or texture to improve the appearance or tactile effect. The hardening layer provides hardness, wear resistance and protective properties of the film, and adopts UV hardening technology to achieve rapid hardening. The pattern printing layer includes the required pattern, image or print, which is used to transfer to the target surface. The adhesive layer adheres the pattern to the target surface after the pattern printing is completed. The release film acts as a separation film layer to protect the adhesive layer and prevent it from adhering to other surfaces or materials during storage and transportation. Through this layered structure, a 3D over-mold transfer process from pattern printing to adhesion to the target surface is realized to create a decorative effect with a specific texture, pattern and color.

[0060] In summary, this application includes at least one of the following beneficial technical effects:

[0061] 1. The transfer film adopts a layered structure, including a base film layer, a release layer, a texture layer, a hardening layer, a pattern printing layer, an adhesive layer and a release film. It has multiple functions and properties. Specific materials and hierarchical structures are used to maintain its shape and performance. The hardening layer includes nano-wear-resistant materials to increase the wear resistance of the film. Photocurable monomers and photoinitiators are used to achieve rapid hardening and fixation of the pattern printing layer and the adhesive layer. The ink pattern printing layer uses polyurethane as a binder, which has strong adhesion. The photocuring technology used in the preparation process reduces the emission of volatile organic compounds and is beneficial to environmental protection. The transfer film body has the advantages of multi-layer structure, high stretchability, wear resistance, wide applicability, high efficiency and environmental protection.

[0062] 2. High stretchability: Improve the tensile properties of the diaphragm, suitable for high-stretch 3D mold forming applications,

[0063] Reduce damage or loss of shape during the forming process;

[0064] 3. By adding nano-wear-resistant materials to the hardened layer, the wear resistance of the diaphragm is improved;

[0065] 4. The use of photocurable monomers and photoinitiators allows for rapid film curing, improves production efficiency, and reduces emissions of volatile organic compounds, which is beneficial to environmental protection;

[0066] 5. The ink using polyurethane as the binder is used for the pattern printing layer, which has strong adhesion properties and improves the firm adhesion of the pattern on the adhesive layer;

[0067] 6. Use temperature control and pressure treatment preparation steps in the production of the texture layer to improve the quality, consistency and appearance of the texture layer.

[0068] 7. Use UV curing technology and reduce the use of organic solvents to reduce environmental and health risks;

[0069] 8. By adjusting the composition and proportion of different layers, the different performance characteristics of the film can be adjusted to meet the needs of different applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] Figure 1 This is a flow chart of a method for preparing a high-stretch 3D out-of-mold transfer film according to an embodiment of the present application;

[0071] Figure 2 This is a schematic diagram of a high-stretch 3D out-of-mold transfer film according to an embodiment of the present application.

[0072] Explanation of reference numerals: 100, base film layer; 200, release layer; 300, texture layer; 400, hardening layer; 500, pattern printing layer; 600, adhesive layer; 700, release film; 900, transfer film body. DETAILED DESCRIPTION

[0073] The following is combined with Figure 1-2 This application is described in further detail.

[0074] The embodiments of the present application disclose a method for preparing a high-stretch 3D out-of-mold transfer film.

[0075] Example 1

[0076] Reference Figure 1 The preparation method of the transfer film body 900 includes the following steps: preparing a base film layer 100, preparing a release layer 200, preparing a texture layer 300, preparing a hardening layer 400, preparing a pattern printing layer 500, preparing an adhesive layer 600, and preparing a release film 700. The specific preparation steps are as follows:

[0077] S1. Preparation of base film layer 100: The base film layer 100 is made of any one of polyolefin film, cast polypropylene film, polycarbonate film, non-crystalline copolyester, polyvinyl chloride film, and polymethyl methacrylate film;

[0078] S2. Preparation of release layer 200: OP wax is dissolved in any one or a mixed solvent of xylene, S-150 solvent oil, toluene, n-heptane, and methylcyclohexane to form a release agent. The release agent comprises, by weight, 5-10 parts of OP wax, 40-50 parts of xylene, and 30-50 parts of S-150 solvent oil. The solid content of OP wax in the release agent is 1%-10%. The OP wax is commercially available from one or a mixture of two or more of Clariant Licowwax OPFL, BASF Luwax OP, and German Waradur OP. The release agent is prepared as follows:

[0079] Pour the prepared mixed solvent A into the dissolving kettle and heat it to 90℃ while dispersing.

[0080] In the B dissolving kettle, add the mixed solvent while dispersing the OP wax powder.

[0081] C Add OP wax powder to the mixed solvent and keep it at 90℃ for 2-3 hours until the OP wax powder is completely dissolved in the mixed solvent and then cool it to room temperature.

[0082] D. Filter out the material and use it for filling;

[0083] The release layer 200 is prepared by dissolving 20-40 parts of a solid hydroxy acrylic resin, 20-30 parts of toluene, 20-30 parts of butanone, 10-20 parts of ethyl acetate, 10-20 parts of isocyanate, and 3-10 parts of a silicon-containing additive in a solvent, mixing and dispersing the above materials uniformly. The release layer 200 is then coated on the base film layer 100 using a micro-gravure coating, dried with hot air, and then cured at 60°C for 24 hours.

[0084] S3, coating the release agent of the release layer 200 obtained in step S2 on the upper surface of the base film layer 100 obtained in step S1, and drying with hot air to form the release layer 200;

[0085] S4. Preparation of the texture layer 300: The texture layer 300 is formed by hot pressing. During the preparation of the texture layer 300, the base film layer 100 coated with the release agent is placed on an unwinding mechanism. The texture roller is heated to 120-150° C. The base film layer 100 coated with the release agent is unwound and moved to a position below the texture roller. The texture roller is pressed against the surface of the base film layer 100 coated with the release agent and forced air-cooled before being rewound. The texture film is formed, and the texture layer 300 laminated on the upper surface of the base film layer 100 is completed.

[0086] S5. Preparation of hardened layer 400: The components of the hardening liquid used for hardened layer 400 include, by weight, 30-50 parts of acrylic resin, 30-50 parts of polyurethane acrylate prepolymer, 1-30 parts of photocurable monomer, 5-10 parts of nano-wear-resistant material, 0.3-0.8 parts of ultraviolet absorber, 5-7 parts of photoinitiator, 0.5-1 parts of antioxidant, 0.2-0.5 parts of dispersant, and 30-80 parts of mixed solvent to form the hardening liquid. By using specially modified polyurethane acrylate prepolymer, nano-wear-resistant particles and thermoplastic acrylic resin, the prepared hardening liquid not only has good hardness, but also has good finger-drying properties, no cracking when stretched, and an elongation of more than 300% at room temperature. After light curing, it has good hardness and wear resistance.

[0087] The hardening liquid used in the hardening layer 400 comprises, by weight, 30-50 parts of acrylic resin, 30-50 parts of polyurethane acrylate prepolymer, 1-30 parts of photocurable monomer, 5-10 parts of nano-wear-resistant material, 0.3-0.8 parts of ultraviolet absorber, 5-7 parts of photoinitiator, 0.5-1 parts of antioxidant, 0.2-0.5 parts of dispersant, and 30-80 parts of mixed solvent;

[0088] The acrylic resin has a glass transition temperature of 70-120°C and a molecular weight of 50,000-200,000. The acrylic resin includes BM11 from Bolier, LP51-03, VP1034F, M920, M912, and 66 / 02N from Evonik.

[0089] Polyurethane acrylate prepolymer is a resin with a functionality of 3-9 and excellent weather resistance. The resin raw materials for polyurethane acrylate prepolymer include CN9110 and CN9013 from Sartomer and 6195-100 from Changxing Chemical.

[0090] The photocurable monomer is any one or a combination of pentaerythritol triacrylate, ethoxylated pentaerythritol tetraacrylate, and tricyclodecane dimethanol diacrylate; the photocurable monomer includes pentaerythritol triacrylate, 1.6 hexanediol acrylate, tripropylene glycol acrylate, cyclotrimethylolpropane formal acrylate, tetrahydrofurfuryl acrylate, and dicyclopentenyl acrylate; the photocurable monomer is any one or a combination of pentaerythritol triacrylate, 1.6 hexanediol acrylate, tripropylene glycol acrylate, cyclotrimethylolpropane formal acrylate, tetrahydrofurfuryl acrylate, and dicyclopentenyl acrylate;

[0091] Nano wear-resistant materials include any one or a combination of VK-L30S nano alumina from Hangzhou Zhitai Purification Technology, JC-A30EO nano alumina dispersion slurry from Shenzhen Jingcai Chemical Co., Ltd., German BYK 3601, 3602, 3605, 3610 and other nano alumina dispersion slurries, 30nm silicon nitride from Nanjing Hongde Nanomaterials Co., Ltd., nano diamond, glass powder, and POSS;

[0092] The photoinitiator is any one or a combination of 1-hydroxycyclohexyl phenyl ketone, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, and methyl benzoylformate;

[0093] The ultraviolet absorber is any one or a combination of benzotriazoles and triazines;

[0094] The antioxidant is any one or a combination of high molecular weight hindered phenol antioxidants and phosphite antioxidants;

[0095] The dispersant is any one or a combination of BYK163, BYK110, BYK111, and EFKA4061. The hardening liquid of the above components forms a hardened layer 400 after hardening. The hardened layer 400 is coated on the upper surface of the texture layer 300 obtained in step S4.

[0096] S6. Preparation of the pattern printing layer 500: The pattern printing layer 500 is made of ink with polyurethane as a binder, and the ink is gravure-printed to form the pattern printing layer 500. The pattern printing layer 500 is located on the upper surface of the hardened layer 400 obtained in S5.

[0097] S7. Preparation of adhesive layer 600: The adhesive components used in adhesive layer 600 include, by weight, 10-50 parts of acrylic resin, 30-60 parts of polyurethane acrylate prepolymer, 1-30 parts of photocurable monomer, 5-7 parts of photoinitiator, and 50-70 parts of mixed solvent. The acrylic resin has a glass transition temperature of 40-80°C and a molecular weight of 50,000-100,000. The resin is any one of BM60, 64 / 12N, P24N, 66 / 02N, MB319, and MB-3015, or a combination of any of them.

[0098] The polyurethane acrylic prepolymer uses a resin with a functionality of 2-3, and the resin is any one of CN991, U384, 8413, SD7866, and SD8602, or a combination of several thereof;

[0099] The adhesive made of specially modified polyurethane acrylate prepolymer and thermoplastic acrylic resin not only has good heat activation performance, but also has good initial mechanical strength, which greatly improves the perfection of the coating. It can withstand boiling at 80℃ for 60 minutes and baking at 70℃ for 24 hours.

[0100] The obtained adhesive layer 600 is coated on the upper surface of the pattern printing layer 500 obtained in step S6;

[0101] S8. Preparation of release film 700: The release film 700 is made of a substrate of PP or PE coated with polysiloxane. The obtained release film 700 is coated on the upper surface of the adhesive layer 600 obtained in step S7.

[0102] The implementation principle of the preparation method of a high-stretch 3D over-mold transfer film in this embodiment is as follows: the transfer film body 900 adopts a layered structure preparation step, including the preparation of a base film layer 100, a release layer 200, a texture layer 300, a hardening layer 400, a pattern printing layer 500, an adhesive layer 600 and a release film 700. The 3D over-mold transfer film body 900 generated by the above preparation method has multiple functions and performances, and uses specific materials and hierarchical structures to maintain its shape and performance. The hardening layer 400 includes nano-wear-resistant materials to increase the wear resistance of the film. Photocurable monomers and photoinitiators are used to achieve rapid hardening and fixation of the pattern printing layer and the adhesive layer. The ink pattern printing layer uses polyurethane as a connecting material and has strong adhesion. Photocuring technology is used in the preparation process to reduce the emission of volatile organic compounds, so that the transfer film body 900 has the advantages of multi-layer structure, high stretchability, wear resistance, wide applicability, high efficiency and environmental protection.

[0103] Reference Figure 1 In the preparation method of the transfer film, the hardening liquid used in the preparation of the hardened layer 400 is a high-strength UV hardening liquid. The preparation steps of the high-strength UV hardening liquid are as follows:

[0104] a. Dissolve acrylic resin in ethyl ester to form a resin solution A with a solid content of 40% for later use;

[0105] b. The nanomaterial, ethyl ester and dispersant are uniformly mixed and ground with a nano-horizontal sand mill to form a mixed solution B with a particle size of ≤100 nm;

[0106] c. Add UV monomer, UV absorber, photoinitiator, and antioxidant to resin solution A and disperse at high speed for 1-2 hours at a speed of not less than 1500 rpm to form mixed solution C;

[0107] d. Mix B and C and disperse them evenly to form a mixed solution D;

[0108] e. The polyurethane acrylate prepolymer is added to the mixed solution D and dispersed evenly at a medium speed of 500-800 rpm for 30 minutes. After mixing, the stretchable UV curable liquid is obtained.

[0109] f. Apply the prepared stretchable UV curing liquid to the surface of the release layer 200 or the texture layer 300 using a process such as an anilox roller, comma roller, or slit roller. Set the target thickness. After drying the solvent in an oven, form a touch-dry film layer. Apply the protective film and rewind for later use.

[0110] The high-stretch UV adhesive comprises, by weight, 10-50 parts of acrylic resin, 30-60 parts of polyurethane acrylate prepolymer, 1-30 parts of photocurable monomer, 5-7 parts of photoinitiator, and 50-70 parts of mixed solvent;

[0111] The preferred acrylic resin has a glass transition temperature of 40-80°C and a molecular weight of 50,000-100,000. Commercially available resins include BM60 from Bolier, 64 / 12N, P24N, 66 / 02N, MB319 from Evonik, and Mitsubishi MB-3015, or a combination thereof.

[0112] Polyurethane acrylic prepolymers are preferably resins with 2-3 functional groups and excellent weather resistance. Commercially available products include CN991 from Sartomer, U384 from Changxing Chemical, 8413 from Cytec, SD7866 from Haohui, and SD8602, or a combination thereof.

[0113] The photocurable monomer preferably includes one or a combination of pentaerythritol triacrylate, 1,6-hexanediol diacrylate, tripropylene glycol diacrylate, cyclotrimethylolpropane formal acrylate, tetrahydrofurfuryl acrylate, and dicyclopentenyl acrylate;

[0114] The initiator includes one or a combination of 1-hydroxycyclohexyl phenyl ketone, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, and methyl benzoylformate.

[0115] Preparation of high tensile UV adhesive:

[0116] a. Dissolve acrylic resin in ethyl ester to form a resin solution A with a solid content of 40% for later use;

[0117] b. Add UV monomer and photoinitiator to resin liquid A and disperse at high speed for 1-2 hours at a speed of not less than 1500 rpm to form mixed liquid B;

[0118] c. Add the polyurethane acrylate prepolymer to the mixture B and disperse it evenly at a medium speed of 500-800 rpm for 30 minutes. After mixing, a high-stretch UV adhesive is obtained.

[0119] d. The prepared high-strength UV adhesive is applied to the surface of the pattern layer 5 by an anilox roller, comma roller, slit roller, etc., setting the target thickness. After the solvent is dried in an oven, a touch-dry film layer is formed, and the release film is rolled up for use.

[0120] 1. The manufacturers and brands of the raw materials used in the high-strength UV curing solution embodiment are as follows:

[0121] acrylic resin Shanghai Bolier MB12 acrylic resin Evonik of Germany LP51 / 03 acrylic resin Evonik of Germany VP1034F UV monomer Changxing Chemical PPTTA Polyurethane acrylic prepolymer Sartomer CN9110 Polyurethane acrylic prepolymer Sartomer CN9013 Wear-resistant materials Hangzhou Zhitai VK-L30S UV absorbers BASF 1130 Photoinitiator IGM 184 Photoinitiator IGM TPO antioxidants BASF 1010 antioxidants BASF 168 dispersants Ajinomoto TTS

[0122] 2. The weight of each component of high tensile UV curing solution is shown in Table 1 below:

[0123]

[0124]

[0125] Example 1

[0126] The weight of each component is shown in Table 1

[0127] Dissolve the acrylic resin with solvent, add UV monomer, nano powder grinding slurry, initiator, etc. into the acrylic resin liquid and disperse evenly; finally add polyurethane acrylate prepolymer and stir evenly.

[0128] Then you get the high tensile UV curing liquid.

[0129] The above-mentioned hardening liquid is coated on the surface of the PO base film coated with a release layer, and after drying in an oven, the pattern and adhesive are printed to produce the OMD film. After forming with a special forming machine, the PO base film is peeled off and then irradiated with a UV lamp.

[0130] Example 2

[0131] The weight of each component is shown in Table 1

[0132] The preparation method of high tensile UV curing solution is the same as that of Example 1 in Table 1.

[0133] The preparation method of the OMD diaphragm is the same as that of Example 1 in Table 1.

[0134] The difference from Example 1 is that MB12 is replaced by LP51 / 03.

[0135] Example 3

[0136] The weight of each component is shown in Table 1.

[0137] The preparation method of high tensile UV curing solution is the same as that of Example 2 in Table 1

[0138] The preparation method of the OMD diaphragm is the same as that of Example 2 in Table 1.

[0139] The difference from Example 1 is that MB12 is replaced by VP1034F.

[0140] Example 4

[0141] The weight of each component is shown in Table 1

[0142] The preparation method of high tensile UV curing solution is the same as that of Example 3 in Table 1.

[0143] The preparation method of the OMD diaphragm is the same as that of Example 3 in Table 1.

[0144] The difference from Example 1 is that MB12 is replaced by LP51 / 03, and CN9110 is replaced by CN9013.

[0145] Performance Testing

[0146] 1. Hardness test

[0147] First, form the film, then remove the PO base film. Then, cure with 1000mj / cm² of laser light. After curing, test the hardness with a pencil hardness tester. Test conditions: 1000g weight, Mitsubishi pencil, test speed 15m / min. Test three times in a row. If any of the values exceed the limit, lower the pencil hardness and test again.

[0148] 2. Wear resistance

[0149] First, the PO base film was removed after forming. The film was then cured with a light radiation dose of 1000 mj / cm2. After curing, the film was tested using a steel wool friction tester. The test conditions were: load: 1000 g weight, grinding head: 2 x 2 cm, speed: 70 times / min.

[0150] 3. Stretchability

[0151] Place the OMD film on a 165-degree constant temperature fixture and heat it. After the base film softens, stretch it 300%. After cooling, observe under a microscope to see if there are any cracks.

[0152] From the performance test results of the examples, it can be seen that the high-tensile UV curing liquid prepared in Example 5 has high hardness and good wear resistance.

[0153] It can be seen from the performance test results of the embodiments that the high-strength UV curing liquid prepared by Examples 2-5 of the present application has good wear resistance and high hardness when applied to OMD diaphragms, and has a very broad application prospect.

[0154] Compared with Example 1, in Example 2, the thermoplastic acrylic acid is replaced with high-tg, large-molecule LP51 / 03, which increases the hardness and wear resistance.

[0155] Compared with Example 1, the thermoplastic acrylic in Example 3 is replaced with VP1034F having the same tg but a larger molecular weight, so that the hardness and wear resistance are improved to a certain extent.

[0156] Compared with Example 1, in Example 4, the thermoplastic acrylic acid is replaced with the high-tg, large-molecular LP51 / 03 and the 9-functional polyurethane acrylate prepolymer CN9013 is replaced, so that the hardness and wear resistance are further improved.

[0157] 3. The manufacturers and brands of the raw materials used in the high-strength UV adhesive embodiment are as follows:

[0158] acrylic resin Mitsubishi Rayon MB-3015 acrylic resin Evonik of Germany LP64 / 12N UV monomer Changxing Chemical HDDA Polyurethane acrylic prepolymer Sartomer CN991 Polyurethane acrylic prepolymer Cytec 8413 Photoinitiator IGM 184 Photoinitiator IGM TPO antioxidants BASF 1010 antioxidants BASF 168

[0159] As shown in Figure 2 below:

[0160]

[0161] The weight of each component of Example 5 is shown in Table 2

[0162] Dissolve the acrylic resin with a solvent, add UV monomers, initiators, etc. into the acrylic resin liquid and disperse them evenly, and finally add the polyurethane acrylate prepolymer and stir evenly to obtain a high-stretch UV adhesive.

[0163] The above-mentioned UV adhesive is applied to the surface of the pattern layer and dried in an oven to obtain the OMD film. After being formed by a special molding machine, the PO base film is peeled off and then irradiated with a UV lamp.

[0164] Example 6

[0165] The weight of each component is shown in Table 2

[0166] The preparation method of high tensile UV adhesive is the same as that of Example 5.

[0167] The preparation method of the OMD diaphragm is the same as that of Example 5.

[0168] The difference from Example 5 is that CN991 is replaced by 8413.

[0169] Example 7

[0170] The weight of each component is shown in Table 2

[0171] The preparation method of high tensile UV adhesive is the same as that of Example 5.

[0172] The preparation method of OMD diaphragm is the same as that of Example 5

[0173] The difference from Example 5 is that MB3015 is replaced with LP64 / 12N.

[0174] Example 8

[0175] The weight of each component is shown in Table 2

[0176] The preparation method of high tensile UV adhesive is the same as that of Example 5.

[0177] The preparation method of OMD diaphragm is the same as that of Example 5

[0178] The difference from Example 5 is that MB3015 is replaced by LP64 / 12N, and CN991 is replaced by 8413.

[0179] Performance Testing

[0180] 1. Adhesion test

[0181] First form the film and then peel off the PO base film, then use 1000mj / cm2 of light laser to irradiate and cure it. After curing, use a grid knife with a spacing of 0.5mm to cut a cross grid, attach the tesa 4657 tape, roll it back and forth 5 times with a rolling wheel, leave it for 10 minutes and then peel it off quickly to check the shedding condition within the grid and the grid lines.

[0182] 1. Covering

[0183] First form and then peel off the PO base film, check whether there is any transfer defect area on the surface of the workpiece, and then check whether there is any defect when transferring on the second and third sides of the workpiece. If there is no defect, the covering property is excellent.

[0184] 3. Stretchability

[0185] The OMD film was placed in a 165-degree constant temperature fixture for heating. After the base film softened, it was stretched by 300%. After cooling, it was observed under a microscope to see if there were any cracks. The performance test results of the embodiment show that the high-stretch UV adhesive prepared in Example 7 has good coating properties and good adhesion.

[0186] The performance test results of the embodiments show that the high-strength UV adhesive prepared in Examples 5-8 of the present invention has good coating properties and adhesion when applied to OMD films, and has a very broad application prospect.

[0187] Compared with Example 5, in Example 6, the polyurethane acrylate prepolymer was replaced by 8413 instead of CN991, resulting in poor coating properties and decreased adhesion.

[0188] Compared with Example 5, the thermoplastic acrylic in Example 7 is replaced with LP64 / 12N with a slightly higher tg, which has excellent coating performance and adhesion.

[0189] Compared with Example 5, in Example 8, MB3015 was replaced by LP64 / 12N, and CN991 was replaced by 8413, and both the coating performance and adhesion were reduced.

[0190] The present embodiment also discloses a high-stretch 3D molded transfer film, referring to Figure 2The layered structure of the transfer film body 900 is, from bottom to top, a base film layer 100, a release layer 200, a texture layer 300, a hardening layer 400, a pattern printing layer 500, an adhesive layer 600, and a release film 700. The transfer film body 900 is produced by a preparation method of a high-stretch 3D out-of-mold transfer film.

[0191] The implementation principle of a high-stretch 3D over-mold transfer film according to an embodiment of the present application is as follows: the layered structure of the transfer film body 900 has multiple layers, each layer has different functions, the base film layer 100 provides structural support for the film, acts as a bottom layer, and supports the upper coating layer, usually with mechanical strength, flatness and stability, the release layer 200 acts as a separation layer, protects and separates the pattern printing layer, and the pattern can be transferred to the target surface during the transfer process while avoiding adhesion, the texture layer 300 includes a layer with a specific texture, pattern or line, which is used to simulate or replicate the desired surface texture or texture to improve the appearance or tactile effect, the hardening layer 400 provides the hardness, wear resistance and protection of the film, and adopts UV hardening technology to achieve rapid hardening, the pattern printing layer 500 includes the required pattern, image or print for transfer to the target surface, the adhesive layer 600 adheres the pattern to the target surface after the pattern printing is completed, and the release film 700 serves as a separation film layer to protect the adhesive layer and prevent it from adhering to other surfaces or materials during storage and transportation. Through this layered structure, the 3D molded transfer process from pattern printing to adhesion to the target surface is realized.

[0192] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A method for preparing a high-stretch 3D out-of-mold transfer film, comprising a method for preparing a transfer film body (900), characterized in that: The preparation method of the transfer film body (900) is sequentially preparing a base film layer (100), preparing a release layer (200), preparing a texture layer (300), preparing a hardening layer (400), preparing a pattern printing layer (500), preparing an adhesive layer (600), and preparing a release film (700). The specific preparation steps are as follows: S1. Preparation of a base film layer (100): The base film layer (100) is made of any one of polyolefin film, cast polypropylene film, polycarbonate film, non-crystalline copolyester, polyvinyl chloride film, and polymethyl methacrylate film; S2. Preparation of release layer (200): dissolving OP wax in any one of xylene, S-150 solvent oil, toluene, n-heptane, and methylcyclohexane, or any mixed solvent thereof to form a release agent, wherein the solid content of OP wax in the release agent is 1%-10%; S3, coating the release agent of the release layer (200) obtained in step S2 on the upper surface of the base film layer (100) obtained in step S1, and drying with hot air to form the release layer (200); S4, preparation of the texture layer (300): the texture layer (300) is formed by hot pressing the surface of the release film obtained in step S3 using a hot pressing roller; S5. Preparation of a hardening layer (400): The hardening liquid used for the hardening layer (400) comprises the following components in parts by weight: 30-50 parts of acrylic resin, 30-50 parts of polyurethane acrylate prepolymer, 1-30 parts of photocurable monomer, 5-10 parts of nano wear-resistant material, 0.3-0.8 parts of ultraviolet absorber, 5-7 parts of photoinitiator, 0.5-1 parts of antioxidant, 0.2-0.5 parts of dispersant, and 30-80 parts of mixed solvent to form a hardening liquid; After the hardening liquid hardens, a hardened layer (400) is formed, and the hardened layer (400) is covered on the upper surface of the texture layer (300) obtained in step S4; S6. Preparation of a pattern printing layer (500): The pattern printing layer (500) is made of ink using polyurethane as a binder, and the ink is gravure-printed to produce the pattern printing layer (500). The pattern printing layer (500) is located on the upper surface of the hardened layer (400) obtained in S5; S7, preparation of the adhesive layer (600): the adhesive components used in the adhesive layer (600) include, by weight: 10-50 parts of acrylic resin, 30-60 parts of polyurethane acrylate prepolymer, 1-30 parts of photocurable monomer, 5-7 parts of photoinitiator, and 50-70 parts of mixed solvent; The obtained adhesive layer (600) is coated on the upper surface of the pattern printing layer (500) obtained in step S6; S8. Preparation of release film (700): The release film (700) is made of a material which is a substrate of PP or PE and coated with polysiloxane to form a release film (700). The obtained release film (700) is coated on the upper surface of the adhesive layer (600) obtained in step S7.

2. The method for preparing a high-stretch 3D out-of-mold transfer film according to claim 1, characterized in that: The release layer (200) is prepared by dissolving the materials of the release layer (200) in a solvent, mixing and dispersing the materials uniformly, and then coating the release layer (200) on the base film layer (100) by micro-gravure coating, drying with hot air, and then curing at 60°C for 24 hours.

3. The method for preparing a high-strength 3D out-of-mold transfer film according to claim 2, characterized in that: The release agent components of the release layer (200) include, by weight: 5-10 parts of OP wax, 40-50 parts of xylene, and 30-50 parts of S-150 solvent oil; The preparation method of the release agent is as follows: Pour the prepared mixed solvent A into the dissolving kettle and heat to 90°C while dispersing; In the B dissolving kettle, the mixed solvent is dispersed while adding OP wax powder; C. Add OP wax powder to the mixed solvent and keep it at 90℃ for 2-3 hours until the OP wax powder is completely dissolved in the mixed solvent and then cool it to room temperature; D. Filter and discharge the material for filling.

4. The method for preparing a high-strength 3D out-of-mold transfer film according to claim 1, characterized in that: During the production of the texture layer (300), the base film layer (100) coated with a release agent is placed on an unwinding mechanism, the texture pressing roller is heated to 120-150° C., the base film layer (100) coated with a release agent is unrolled and moved to a position below the texture roller, the texture roller is pressed tightly against the surface of the base film layer (100) coated with a release agent, and the texture roller is forced to cool and then rewound, thereby forming a texture film. The texture layer (300) laminated on the upper surface of the base film layer (100) is then produced.

5. The method for preparing a high-strength 3D out-of-mold transfer film according to claim 1, characterized in that: The hardening liquid used in the hardened layer (400) is composed of 30-50 parts of acrylic resin, 30-50 parts of polyurethane acrylate prepolymer, 1-30 parts of photocurable monomer, 5-10 parts of nano wear-resistant material, 0.3-0.8 parts of ultraviolet absorber, 5-7 parts of photoinitiator, 0.5-1 parts of antioxidant, 0.2-0.5 parts of dispersant, and 30-80 parts of mixed solvent in parts by weight; The acrylic resin uses a resin with a glass transition temperature of 70-120°C and a molecular weight of 50,000-200,000; Polyurethane acrylate prepolymer is a resin with a functionality of 3-9; The photocurable monomer is any one or a combination of pentaerythritol triacrylate, ethoxylated pentaerythritol tetraacrylate, and tricyclodecane dimethanol diacrylate; The nano wear-resistant material includes any one or a combination of nano alumina, nano alumina dispersion, silicon nitride, nano diamond, glass powder, and POSS; The photoinitiator is any one or a combination of 1-hydroxycyclohexyl phenyl ketone, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, and methyl benzoylformate; The ultraviolet absorber is any one or a combination of benzotriazoles and triazines; The antioxidant is any one or a combination of high molecular weight hindered phenol antioxidants and phosphite antioxidants; The dispersant is any one of BYK163, BYK110, BYK111, and EFKA4061, or a combination of several of them.

6. The method for preparing a high-strength 3D out-of-mold transfer film according to claim 5, characterized in that: The hardening liquid is a stretchable UV hardening liquid, and the preparation method of the hardening liquid is as follows: a. The acrylic resin was dissolved in ethyl ester to form a resin solution containing 40% solids A for standby; b. The nanomaterial, ethyl ester and dispersant are uniformly mixed and ground with a nano-horizontal sand mill to form a mixed solution B with a particle size of ≤100 nm; c. Add UV monomer, UV absorber, photoinitiator, antioxidant to resin liquid A and disperse at high speed for 1-2 hours at a speed of not less than 1500 rpm to form mixed liquid C. d. Mix the mixed solution B and the mixed solution C to form a mixed solution D. e. Add the polyurethane acrylate prepolymer to the mixed solution D and evenly disperse it at medium speed, 500-800 rpm, for 30 minutes. After mixing, it becomes a stretchable UV curable liquid. f1. The stretchable UV curing liquid prepared in the above steps ae is coated on the surface of the release layer (200) through an anilox roller, a comma roller, and a slit process, and the target thickness is set. After the solvent is dried in an oven, a hardened layer (400) that is dry to the touch is formed. The hardened layer (400) is laminated to the protective film and rolled up for use. f2. The stretchable UV curing liquid prepared in steps a to e is coated on the surface of the texture layer (300) using an anilox roller, a comma roller, or a slit process, and a target thickness is set. After the solvent is dried in an oven, a touch-dry hardened layer (400) is formed. The hardened layer (400) is laminated to a protective film and rolled up for use.

7. The method for preparing a high-stretch 3D out-of-mold transfer film according to claim 1, characterized in that: The acrylic resin has a glass transition temperature of 40-80° C. and a molecular weight of 50,000-100,000, and is any one of BM60, 64 / 12N, P24N, 66 / 02N, MB319, and MB-3015, or a combination of any of the above. The polyurethane acrylic prepolymer adopts a resin with a functionality of 2-3, and the resin is any one of CN991, U384, 8413, SD7866, and SD8602, or a combination of several of them.

8. The method for preparing a high-stretch 3D out-of-mold transfer film according to claim 7, characterized in that: The photocurable monomer includes pentaerythritol triacrylate, 1.6 hexanediol acrylate, tripropylene glycol acrylate, cyclotrimethylolpropane formal acrylate, tetrahydrofurfuryl acrylate, and dicyclopentenyl acrylate. The photocurable monomer is any one of pentaerythritol triacrylate, 1.6 hexanediol acrylate, tripropylene glycol acrylate, cyclotrimethylolpropane formal acrylate, tetrahydrofurfuryl acrylate, and dicyclopentenyl acrylate, or any combination of several of them.

9. The method for preparing a high-stretch 3D out-of-mold transfer film according to claim 7, characterized in that: The initiator includes any one of 1-hydroxycyclohexyl phenyl ketone, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, and methyl benzoylformate, or any combination of several of them.

10. A high-stretch 3D out-of-mold transfer film, comprising a transfer film body (900), characterized in that: The layered structure of the transfer film body (900) is, from bottom to top, a base film layer (100), a release layer (200), a texture layer (300), a hardening layer (400), a pattern printing layer (500), an adhesive layer (600), and a release film (700). The transfer film body (900) is produced using the preparation method of claim 1.

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