High-adhesion anti-fingerprint UV film and preparation method thereof

Abstract

The invention discloses a high-adhesion anti-fingerprint UV film and a preparation method thereof. The UV film comprises a base layer, a bonding layer, a functional layer and an anti-fingerprint layer which are sequentially stacked. The silane coupling agent KH-560 added in the bonding layer can chemically react with active groups on the surfaces of the base layer and the protected base material to form chemical bond connection, and meanwhile, a polymer network structure formed by urethane acrylate and 2-ethylhexyl acrylate further enhances the bonding force with the base material. Fluorosilicone resin in the anti-fingerprint layer has the characteristic of low surface energy, so that the adhesive force between fingerprint stains and the surface of the film can be effectively reduced, and fingerprints are easy to wipe and remove; due to the addition of the aziridine cross-linking agent, the anti-fingerprint layer forms a compact cross-linked network structure, and the wear resistance and durability of the anti-fingerprint layer are improved. The nano silicon dioxide in the functional layer not only improves the hardness and the wear resistance of the UV film, but also can improve the optical performance of the film.

Description

Technical Field

[0001] This invention relates to the field of UV film materials, and in particular to a high-adhesion anti-fingerprint UV film and its preparation method. Background Technology

[0002] With the widespread use of electronic devices, UV films, as an important surface protection material, have been extensively used. However, some problems exist with current UV films on the market. Firstly, the adhesion between the UV film and the protected substrate (such as glass and plastic) is insufficient, easily leading to edge lifting and peeling, affecting the protective effect and user experience. Secondly, existing UV films have poor fingerprint resistance; in daily use, fingerprints easily remain after touching the film, affecting not only the appearance but also making cleaning difficult.

[0003] In existing technologies, some UV films improve adhesion by adding tackifiers, but the addition of tackifiers may affect the film's optical properties and weather resistance. Furthermore, improvements in anti-fingerprint properties often involve coating the film surface with a simple fluorosilicone coating, but its anti-fingerprint durability and abrasion resistance are not ideal. Therefore, there is an urgent need to develop a UV film and its preparation method that combine high adhesion and excellent anti-fingerprint properties. Summary of the Invention

[0004] The technical problem to be solved by this invention is to address the shortcomings of the prior art by providing a high-adhesion anti-fingerprint UV film and its preparation method. This improves the adhesion and anti-fingerprint properties of the UV film, thereby enhancing its overall performance and effectiveness.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is a high-adhesion anti-fingerprint UV film, comprising a base layer, an adhesive layer, a functional layer and an anti-fingerprint layer stacked in sequence; The functional layer is obtained by coating a functional layer coating and then curing it. The functional layer coating includes the following components by weight: 40-50 parts epoxy acrylate, 15-25 parts tripropylene glycol diacrylate, 5-10 parts nano silica, and 4-6 parts photoinitiator.

[0006] Preferably, the functional layer coating is prepared by the following steps: uniformly mixing epoxy acrylate, tripropylene glycol diacrylate, nano silica, and photoinitiator to obtain the functional layer coating; The coating thickness of the functional layer coating is 8-12μm.

[0007] Preferably, the adhesive layer is obtained by applying an adhesive coating and then curing it. The adhesive coating comprises the following components by weight: 30-40 parts of polyurethane acrylate, 20-30 parts of isooctyl acrylate, 5-10 parts of adhesion promoter, and 3-5 parts of photoinitiator.

[0008] Preferably, the adhesion promoter is silane coupling agent KH-560.

[0009] Preferably, the adhesive layer coating is prepared by the following steps: mixing polyurethane acrylate, isooctyl acrylate, silane coupling agent and photoinitiator evenly to obtain the adhesive layer coating; The coating thickness of the adhesive layer is 7-8 μm.

[0010] Preferably, the anti-fingerprint layer is obtained by coating an anti-fingerprint coating and then curing it. The anti-fingerprint coating comprises the following components by weight: 20-30 parts of fluorosilicone resin, 10-15 parts of methyl methacrylate, 3-5 parts of crosslinking agent, and 2-4 parts of photoinitiator. The crosslinking agent is a aziridine crosslinking agent.

[0011] Preferably, the anti-fingerprint coating is prepared by the following steps: mixing fluorosilicone resin, methyl methacrylate, crosslinking agent and photoinitiator evenly to obtain the anti-fingerprint coating; The coating thickness of the anti-fingerprint layer is 3-5μm.

[0012] Preferably, the base layer is a polyethylene terephthalate film with a thickness of 25-50 μm.

[0013] The present invention also provides a method for preparing a high-adhesion anti-fingerprint UV film as described above, comprising the following steps: S1. By weight, mix 30-40 parts of polyurethane acrylate, 20-30 parts of isooctyl acrylate, 5-10 parts of adhesion promoter, and 3-5 parts of photoinitiator, stir evenly to obtain an adhesive layer coating; apply the adhesive layer coating evenly to the substrate, and cure by ultraviolet light to form an adhesive layer. S2. By weight, mix 40-50 parts of epoxy acrylate, 15-25 parts of tripropylene glycol diacrylate, 5-10 parts of nano silica, and 4-6 parts of photoinitiator, stir evenly to obtain a functional layer coating; apply the functional layer coating onto the adhesive layer; cure by ultraviolet light to form a functional layer. S3. By weight, mix 20-30 parts of fluorosilicone resin, 10-15 parts of methyl methacrylate, 3-5 parts of crosslinking agent, and 2-4 parts of photoinitiator, stir evenly to obtain an anti-fingerprint coating layer; uniformly coat the anti-fingerprint coating layer onto the functional layer, cure by ultraviolet light irradiation to form an anti-fingerprint layer, and finally obtain the high adhesion anti-fingerprint UV film.

[0014] Preferably, the method for preparing the high-adhesion anti-fingerprint UV film includes the following steps: S1. By weight, mix 30-40 parts of polyurethane acrylate, 20-30 parts of isooctyl acrylate, 5-10 parts of adhesion promoter, and 3-5 parts of photoinitiator, and stir evenly at a speed of 300-500 r / min to obtain an adhesive layer coating; apply the adhesive layer coating evenly to the substrate by roller coating, with the coating thickness controlled at 5-8 μm; cure by irradiation under ultraviolet light intensity of 800-1200 mW / cm² for 2-4 seconds to form an adhesive layer; S2. By weight, mix 40-50 parts of epoxy acrylate, 15-25 parts of tripropylene glycol diacrylate, 5-10 parts of nano silica, and 4-6 parts of photoinitiator, and stir evenly at 800-1000 r / min to obtain a functional layer coating; apply the functional layer coating to the adhesive layer by scraping, with a coating thickness of 8-12 μm; cure for 3-5 s under ultraviolet light intensity of 1000-1500 mW / cm² to form a functional layer; S3. By weight, mix 20-30 parts of fluorosilicone resin, 10-15 parts of methyl methacrylate, 3-5 parts of crosslinking agent, and 2-4 parts of photoinitiator, and stir evenly to obtain an anti-fingerprint coating layer; apply the anti-fingerprint coating layer evenly to the functional layer by spraying, with a coating thickness of 3-5 μm; cure for 2-3 seconds under ultraviolet light intensity of 600-1000 mW / cm² to form an anti-fingerprint layer, and finally obtain the high adhesion anti-fingerprint UV film.

[0015] The beneficial effects of this invention are: This invention provides a high-adhesion anti-fingerprint UV film and its preparation method. The high-adhesion anti-fingerprint UV film of this invention has at least the following advantages: 1. High Adhesion: The silane coupling agent KH-560 added to the adhesive layer of this invention can chemically react with the active groups on the surface of the base layer and the protected substrate to form chemical bonds. Simultaneously, the polymer network structure formed by polyurethane acrylate and isooctyl acrylate further enhances the adhesion to the substrate. Testing shows that the adhesion between the UV film of this invention and the glass substrate reaches grade 0 (according to GB / T 9286-1998 standard), significantly superior to existing UV films.

[0016] 2. Excellent anti-fingerprint performance: The fluorosilicone resin in the anti-fingerprint layer of this invention has low surface energy, which effectively reduces the adhesion of fingerprint stains to the film surface, making fingerprints easy to wipe away. The addition of aziridine crosslinking agent forms a dense crosslinked network structure in the anti-fingerprint layer, improving its wear resistance and durability. Tests show that the UV film surface contact angle of this invention can reach 115°-125°, and it can withstand more than 500 fingerprint wiping cycles while maintaining good anti-fingerprint performance.

[0017] 3. Excellent overall performance: The nano-silica in the functional layer not only improves the hardness and wear resistance of the UV film, but also improves the optical properties of the film, so that the light transmittance of the UV film can reach more than 92%; the reasonable combination and synergistic effect between the layers enable the UV film of the present invention to achieve a good balance in terms of adhesion, anti-fingerprint performance, optical performance and mechanical properties, and has broad application prospects. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to embodiments, so that those skilled in the art can implement it based on the description.

[0019] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0020] Unless otherwise specified, the experimental methods used in the following examples are conventional methods. Unless otherwise specified, the materials and reagents used in the following examples are commercially available. For examples where specific conditions are not specified, conventional conditions or conditions recommended by the manufacturer are followed. For reagents or instruments whose manufacturers are not specified, they are all commercially available products.

[0021] The present invention provides a high-adhesion anti-fingerprint UV film, comprising a base layer, an adhesive layer, a functional layer and an anti-fingerprint layer stacked sequentially.

[0022] In a preferred embodiment, the substrate is a polyethylene terephthalate (PET) film with a thickness of 25-50 μm, which provides support and basic physical properties for the entire UV film.

[0023] In a preferred embodiment, the adhesive layer is obtained by applying an adhesive coating and then curing it. The adhesive coating comprises the following components by weight: 30-40 parts polyurethane acrylate, 20-30 parts isooctyl acrylate, 5-10 parts adhesion promoter, and 3-5 parts photoinitiator. This adhesive layer can effectively enhance the adhesion between the UV film and the substrate.

[0024] In a preferred embodiment, the adhesion promoter is silane coupling agent KH-560.

[0025] In a preferred embodiment, the adhesive layer coating is prepared by the following steps: mixing polyurethane acrylate, isooctyl acrylate, silane coupling agent and photoinitiator evenly to obtain the adhesive layer coating.

[0026] In a preferred embodiment, the coating thickness of the adhesive layer is 7-8 μm.

[0027] In a preferred embodiment, the functional layer is obtained by coating and curing a functional layer coating, which comprises the following components by weight: 40-50 parts epoxy acrylate, 15-25 parts tripropylene glycol diacrylate, 5-10 parts nano-silica, and 4-6 parts photoinitiator. The functional layer imparts good hardness, abrasion resistance, and optical properties to the UV film.

[0028] In a preferred embodiment, the functional layer coating is prepared by the following steps: epoxy acrylate, tripropylene glycol diacrylate, nano silica, and photoinitiator are mixed evenly to obtain the functional layer coating.

[0029] In a preferred embodiment, the coating thickness of the functional layer coating is 8-12 μm.

[0030] In a preferred embodiment, the anti-fingerprint layer is obtained by coating an anti-fingerprint layer coating and then curing it. The anti-fingerprint layer coating comprises the following components by weight: 20-30 parts of fluorosilicone resin, 10-15 parts of methyl methacrylate, 3-5 parts of crosslinking agent, and 2-4 parts of photoinitiator. The anti-fingerprint layer effectively prevents fingerprint residue and has good durability and abrasion resistance.

[0031] In a preferred embodiment, the crosslinking agent is a aziridine crosslinking agent.

[0032] In a preferred embodiment, the anti-fingerprint coating is prepared by the following steps: fluorosilicone resin, methyl methacrylate, crosslinking agent, and photoinitiator are mixed evenly to obtain the anti-fingerprint coating.

[0033] In a preferred embodiment, the coating thickness of the anti-fingerprint layer is 3-5 μm.

[0034] The present invention also provides a method for preparing the above-mentioned high-adhesion anti-fingerprint UV film, comprising the following steps: S1. By weight, mix 30-40 parts of polyurethane acrylate, 20-30 parts of isooctyl acrylate, 5-10 parts of adhesion promoter, and 3-5 parts of photoinitiator, stir evenly to obtain an adhesive layer coating; apply the adhesive layer coating evenly to the substrate, and cure by ultraviolet light to form an adhesive layer. S2. By weight, mix 40-50 parts of epoxy acrylate, 15-25 parts of tripropylene glycol diacrylate, 5-10 parts of nano silica, and 4-6 parts of photoinitiator, stir evenly to obtain a functional layer coating; apply the functional layer coating onto the adhesive layer; cure by ultraviolet light to form a functional layer. S3. By weight, mix 20-30 parts of fluorosilicone resin, 10-15 parts of methyl methacrylate, 3-5 parts of crosslinking agent, and 2-4 parts of photoinitiator, stir evenly to obtain an anti-fingerprint coating layer; apply the anti-fingerprint coating layer evenly on the functional layer, cure it by ultraviolet light to form an anti-fingerprint layer, and finally obtain a high-adhesion anti-fingerprint UV film.

[0035] In a preferred embodiment, the method for preparing a high-adhesion anti-fingerprint UV film includes the following steps: S1. By weight, mix 30-40 parts of polyurethane acrylate, 20-30 parts of isooctyl acrylate, 5-10 parts of adhesion promoter, and 3-5 parts of photoinitiator, and stir evenly at a speed of 300-500 r / min to obtain an adhesive layer coating; apply the adhesive layer coating evenly to the substrate by roller coating, with the coating thickness controlled at 5-8 μm; cure by irradiation under ultraviolet light intensity of 800-1200 mW / cm² for 2-4 seconds to form an adhesive layer; S2. By weight, mix 40-50 parts of epoxy acrylate, 15-25 parts of tripropylene glycol diacrylate, 5-10 parts of nano silica, and 4-6 parts of photoinitiator, and stir evenly at 800-1000 r / min to obtain a functional layer coating; apply the functional layer coating to the adhesive layer by scraping, with a coating thickness of 8-12 μm; cure for 3-5 s under ultraviolet light intensity of 1000-1500 mW / cm² to form a functional layer; S3. By weight, mix 20-30 parts of fluorosilicone resin, 10-15 parts of methyl methacrylate, 3-5 parts of crosslinking agent, and 2-4 parts of photoinitiator, and stir evenly to obtain an anti-fingerprint coating layer. Apply the anti-fingerprint coating layer evenly to the functional layer by spraying, with a coating thickness of 3-5 μm. Curing time is 2-3 s under ultraviolet light intensity of 600-1000 mW / cm² to form an anti-fingerprint layer, and finally obtain a high-adhesion anti-fingerprint UV film.

[0036] The above is the general concept of the present invention. Based on this, detailed embodiments and comparative examples are provided below to further illustrate the present invention.

[0037] All units in the following ingredient ratios are parts by weight.

[0038] Example 1 A high-adhesion anti-fingerprint UV film comprises a base layer, an adhesive layer, a functional layer, and an anti-fingerprint layer stacked sequentially, and its preparation method includes the following steps: S1. Provide the base layer: Select a 60μm thick polyethylene terephthalate (PET) film as the base layer; S2. Preparation of adhesive layer: Weigh 32 parts of polyurethane acrylate, 22 parts of isooctyl acrylate, 6 parts of silane coupling agent KH-560, and 4 parts of 1-hydroxycyclohexylphenyl ketone photoinitiator 184 according to the weight ratio. After mixing evenly, apply the mixture to the substrate by roller coating. The coating thickness is 6μm. UV cure is performed under the conditions of UV intensity of 1000mW / cm² and curing time of 3s to form adhesive layer. S3. Preparation of functional layer: Weigh 42 parts of epoxy acrylate, 18 parts of tripropylene glycol diacrylate, 6 parts of nano silica, and 184.5 parts of 1-hydroxycyclohexylphenyl ketone photoinitiator according to the weight ratio. After high-speed dispersion at 1000r / min, coat it onto the adhesive layer with a coating thickness of 9μm. UV cure it under the conditions of UV intensity of 1200mW / cm² and curing time of 4s to form the functional layer. S4. Preparation of anti-fingerprint layer: Weigh 22 parts of fluorosilicone resin, 12 parts of methyl methacrylate, 4 parts of aziridine crosslinking agent, and 3 parts of 1-hydroxycyclohexylphenyl ketone photoinitiator according to the weight ratio. After stirring evenly, spray the mixture onto the functional layer with a coating thickness of 4 μm. UV cure the coating under the conditions of UV intensity of 800 mW / cm² and curing time of 2.5 s to form an anti-fingerprint layer, and finally obtain the high adhesion anti-fingerprint UV film.

[0039] Example 2 A high-adhesion anti-fingerprint UV film comprises a base layer, an adhesive layer, a functional layer, and an anti-fingerprint layer stacked sequentially, and its preparation method includes the following steps: S1. Substrate: A 70μm thick polyethylene terephthalate (PET) film is used as the substrate; S2. Preparation of adhesive layer: Weigh 38 parts of polyurethane acrylate, 28 parts of isooctyl acrylate, 8 parts of silane coupling agent KH-560, and 4.5 parts of 1-hydroxycyclohexylphenyl ketone photoinitiator 184 according to the weight ratio. Mix them and roll them onto the substrate with a coating thickness of 7μm. UV cure them under the conditions of UV intensity of 1100mW / cm² and curing time of 3.5s to form an adhesive layer. S3. Preparation of functional layer: Weigh 48 parts of epoxy acrylate, 22 parts of tripropylene glycol diacrylate, 8 parts of nano silica, and 5.5 parts of 1-hydroxycyclohexylphenyl ketone photoinitiator according to the weight ratio. After uniform dispersion at 000 r / min, coat the coating onto the adhesive layer with a coating thickness of 10 μm. UV cure under the conditions of UV intensity of 1300 mW / cm² and curing time of 4.5 s to form the functional layer. S4. Preparation of anti-fingerprint layer: Weigh 28 parts of fluorosilicone resin, 14 parts of methyl methacrylate, 4.5 parts of aziridine crosslinking agent, and 3.5 parts of 1-hydroxycyclohexylphenyl ketone photoinitiator 184 according to the weight ratio. After stirring evenly, spray the mixture onto the functional layer with a coating thickness of 4.5 μm. UV cure the coating under the conditions of UV intensity of 900 mW / cm² and curing time of 2.8 s to form an anti-fingerprint layer, and finally obtain the high adhesion anti-fingerprint UV film.

[0040] Comparative Example 1 A high-adhesion anti-fingerprint UV film comprises a base layer, an adhesive layer, a functional layer, and an anti-fingerprint layer stacked sequentially, and its preparation method includes the following steps: S1. Provide the base layer: Use a 70μm thick polyethylene terephthalate (PET) film as the base layer; S2. Preparation of adhesive layer: Weigh 38 parts of polyurethane acrylate, 28 parts of isooctyl acrylate, and 4.5 parts of 1-hydroxycyclohexylphenyl ketone photoinitiator by weight, mix them, and roll them onto the substrate with a coating thickness of 7μm. UV cure them under the conditions of UV intensity of 1100mW / cm² and curing time of 3.5s to form an adhesive layer. S3. Preparation of functional layer: Weigh 48 parts of epoxy acrylate, 22 parts of tripropylene glycol diacrylate, 8 parts of nano silica, and 5.5 parts of 1-hydroxycyclohexylphenyl ketone photoinitiator according to the weight ratio. After uniform dispersion at 000 r / min, coat the coating onto the adhesive layer with a coating thickness of 10 μm. UV cure under the conditions of UV intensity of 1300 mW / cm² and curing time of 4.5 s to form the functional layer. S4. Preparation of anti-fingerprint layer: Weigh 28 parts of fluorosilicone resin, 14 parts of methyl methacrylate, 4.5 parts of aziridine crosslinking agent, and 3.5 parts of 1-hydroxycyclohexylphenyl ketone photoinitiator 184 according to the weight ratio. After stirring evenly, spray the mixture onto the functional layer with a coating thickness of 4.5 μm. UV cure the coating under the conditions of UV intensity of 900 mW / cm² and curing time of 2.8 s to form an anti-fingerprint layer, and finally obtain the high adhesion anti-fingerprint UV film.

[0041] Comparative Example 2 A high-adhesion anti-fingerprint UV film comprises a base layer, an adhesive layer, a functional layer, and an anti-fingerprint layer stacked sequentially, and its preparation method includes the following steps: S1. Provide the base layer: Use a 70μm thick polyethylene terephthalate (PET) film as the base layer; S2. Preparation of adhesive layer: Weigh 38 parts of polyurethane acrylate, 28 parts of isooctyl acrylate, 8 parts of silane coupling agent KH-560, and 4.5 parts of 1-hydroxycyclohexylphenyl ketone photoinitiator 184 according to the weight ratio. Mix them and roll them onto the substrate with a coating thickness of 7μm. UV cure them under the conditions of UV intensity of 1100mW / cm² and curing time of 3.5s to form an adhesive layer. S3. Preparation of functional layer: Weigh 48 parts of epoxy acrylate, 22 parts of tripropylene glycol diacrylate, 8 parts of nano silica, and 5.5 parts of 1-hydroxycyclohexylphenyl ketone photoinitiator according to the weight ratio. After uniform dispersion at 000 r / min, coat the coating onto the adhesive layer with a coating thickness of 10 μm. UV cure under the conditions of UV intensity of 1300 mW / cm² and curing time of 4.5 s to form the functional layer. S4. Preparation of anti-fingerprint layer: Weigh 28 parts of fluorosilicone resin, 14 parts of methyl methacrylate, and 3.5 parts of 1-hydroxycyclohexylphenyl ketone photoinitiator 184 according to the weight ratio. After stirring evenly, spray the mixture onto the functional layer with a coating thickness of 4.5 μm. UV cure the coating under the conditions of UV intensity of 900 mW / cm² and curing time of 2.8 s to form an anti-fingerprint layer, and finally obtain the high adhesion anti-fingerprint UV film.

[0042] Comparative Example 3 A high-adhesion anti-fingerprint UV film comprises a base layer, an adhesive layer, a functional layer, and an anti-fingerprint layer stacked sequentially, and its preparation method includes the following steps: S1. Provide the base layer: Use a 70μm thick polyethylene terephthalate (PET) film as the base layer; S2. Preparation of adhesive layer: Weigh 38 parts of polyurethane acrylate, 28 parts of isooctyl acrylate, 8 parts of silane coupling agent KH-560, and 4.5 parts of 1-hydroxycyclohexylphenyl ketone photoinitiator 184 according to the weight ratio. Mix them and roll them onto the substrate with a coating thickness of 7μm. UV cure them under the conditions of UV intensity of 1100mW / cm² and curing time of 3.5s to form an adhesive layer. S3. Preparation of functional layer: Weigh 48 parts of epoxy acrylate, 22 parts of tripropylene glycol diacrylate, and 5.5 parts of 1-hydroxycyclohexylphenyl ketone photoinitiator according to the weight ratio. After uniform dispersion at 000 r / min, coat the coating onto the adhesive layer with a coating thickness of 10 μm. UV cure under the conditions of UV intensity of 1300 mW / cm² and curing time of 4.5 s to form the functional layer. S4. Preparation of anti-fingerprint layer: Weigh 28 parts of fluorosilicone resin, 14 parts of methyl methacrylate, 4.5 parts of aziridine crosslinking agent, and 3.5 parts of 1-hydroxycyclohexylphenyl ketone photoinitiator 184 according to the weight ratio. After stirring evenly, spray the mixture onto the functional layer with a coating thickness of 4.5 μm. UV cure the coating under the conditions of UV intensity of 900 mW / cm² and curing time of 2.8 s to form an anti-fingerprint layer, and finally obtain the high adhesion anti-fingerprint UV film.

[0043] Comparative Example 1 Choose a commercially available UV film, specifically a 3D / single-layer post-cured UV film. The performance of the UV films prepared in Examples 1 and 2, as well as the UV films in Comparative Examples 1, 2, and 3, was tested: Adhesion (Grade): At 100℃, boiled in water for 30 minutes; no delamination, adhesion is OK. Surface contact angle (°): Water droplet angle > 108° (after UV curing) Water droplet angle tester Fingerprint swipe count (times): >500 times Light transmittance (%): ≥90%@550nm (after UV curing); The results are shown in Table 1 below: Table 1 Test Project Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Adhesion (Grade) 0 0 2 3 2 Surface contact angle (°) 118 122 95 100 85 Number of fingerprint swipes (times) 520 550 300 250 300 Light transmittance (%) 93 94 88 90 90 The test results show that, compared with the data in the comparative example table, the high adhesion anti-fingerprint UV film prepared by the present invention is significantly better than conventional UV films in terms of adhesion, anti-fingerprint performance and light transmittance, and has significant technical advantages.

[0044] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details.

Claims

1. A high-adhesion anti-fingerprint UV film, characterized in that, It includes a base layer, an adhesive layer, a functional layer, and an anti-fingerprint layer stacked in sequence; The functional layer is obtained by coating a functional layer coating and then curing it. The functional layer coating includes the following components by weight: 40-50 parts epoxy acrylate, 15-25 parts tripropylene glycol diacrylate, 5-10 parts nano silica, and 4-6 parts photoinitiator.

2. The high-adhesion anti-fingerprint UV film according to claim 1, characterized in that, The functional layer coating is prepared by the following steps: epoxy acrylate, tripropylene glycol diacrylate, nano silica and photoinitiator are mixed evenly to obtain the functional layer coating; The coating thickness of the functional layer coating is 8-12μm.

3. The high-adhesion anti-fingerprint UV film according to claim 1, characterized in that, The adhesive layer is obtained by applying an adhesive coating and then curing it. The adhesive coating comprises the following components by weight: 30-40 parts of polyurethane acrylate, 20-30 parts of isooctyl acrylate, 5-10 parts of adhesion promoter, and 3-5 parts of photoinitiator.

4. The high-adhesion anti-fingerprint UV film according to claim 3, characterized in that, The adhesion promoter is silane coupling agent KH-560.

5. The high-adhesion anti-fingerprint UV film according to claim 4, characterized in that, The adhesive layer coating is prepared by the following steps: polyurethane acrylate, isooctyl acrylate, silane coupling agent and photoinitiator are mixed evenly to obtain the adhesive layer coating; The coating thickness of the adhesive layer is 7-8 μm.

6. The high-adhesion anti-fingerprint UV film according to claim 1, characterized in that, The anti-fingerprint layer is obtained by coating an anti-fingerprint coating and then curing it. The anti-fingerprint coating comprises the following components by weight: 20-30 parts of fluorosilicone resin, 10-15 parts of methyl methacrylate, 3-5 parts of crosslinking agent, and 2-4 parts of photoinitiator. The crosslinking agent is a aziridine crosslinking agent.

7. The high-adhesion anti-fingerprint UV film according to claim 6, characterized in that, The anti-fingerprint coating is prepared by the following steps: fluorosilicone resin, methyl methacrylate, crosslinking agent and photoinitiator are mixed evenly to obtain the anti-fingerprint coating. The coating thickness of the anti-fingerprint layer is 3-5μm.

8. The high-adhesion anti-fingerprint UV film according to claim 1, characterized in that, The base layer is a polyethylene terephthalate film with a thickness of 25-50μm.

9. A method for preparing a high-adhesion anti-fingerprint UV film as described in any one of claims 1-8, characterized in that, Includes the following steps: S1. By weight, mix 30-40 parts of polyurethane acrylate, 20-30 parts of isooctyl acrylate, 5-10 parts of adhesion promoter, and 3-5 parts of photoinitiator, stir evenly to obtain an adhesive layer coating; apply the adhesive layer coating evenly to the substrate, and cure by ultraviolet light to form an adhesive layer. S2. By weight, mix 40-50 parts of epoxy acrylate, 15-25 parts of tripropylene glycol diacrylate, 5-10 parts of nano silica, and 4-6 parts of photoinitiator, stir evenly to obtain a functional layer coating; apply the functional layer coating onto the adhesive layer; cure by ultraviolet light to form a functional layer. S3. By weight, mix 20-30 parts of fluorosilicone resin, 10-15 parts of methyl methacrylate, 3-5 parts of crosslinking agent, and 2-4 parts of photoinitiator, stir evenly to obtain an anti-fingerprint coating layer; uniformly coat the anti-fingerprint coating layer onto the functional layer, cure by ultraviolet light irradiation to form an anti-fingerprint layer, and finally obtain the high adhesion anti-fingerprint UV film.

10. The method for preparing a high-adhesion anti-fingerprint UV film according to claim 9, characterized in that, Includes the following steps: S1. By weight, mix 30-40 parts of polyurethane acrylate, 20-30 parts of isooctyl acrylate, 5-10 parts of adhesion promoter, and 3-5 parts of photoinitiator, and stir evenly at a speed of 300-500 r / min to obtain the adhesive coating; apply the adhesive coating evenly to the substrate by roller coating, and control the coating thickness to be 5-8 μm; The adhesive layer is cured by irradiation with ultraviolet light at an intensity of 800-1200 mW / cm² for 2-4 seconds. S2. By weight, mix 40-50 parts of epoxy acrylate, 15-25 parts of tripropylene glycol diacrylate, 5-10 parts of nano silica, and 4-6 parts of photoinitiator, and stir evenly at a speed of 800-1000 r / min to obtain a functional layer coating; apply the functional layer coating to the adhesive layer by scraping, with a coating thickness of 8-12 μm; The functional layer is formed by curing under ultraviolet light intensity of 1000-1500mW / cm² for 3-5 seconds. S3. By weight, mix 20-30 parts of fluorosilicone resin, 10-15 parts of methyl methacrylate, 3-5 parts of crosslinking agent, and 2-4 parts of photoinitiator, and stir evenly to obtain an anti-fingerprint coating layer; apply the anti-fingerprint coating layer evenly to the functional layer by spraying, with a coating thickness of 3-5 μm; cure for 2-3 seconds under ultraviolet light intensity of 600-1000 mW / cm² to form an anti-fingerprint layer, and finally obtain the high adhesion anti-fingerprint UV film.