Anti-ultraviolet and anti-fingerprint explosion-proof film and its production process

Abstract

The present disclosure belongs to the field of thin film technology, specifically relating to an explosion-proof film that is UV-resistant and fingerprint-resistant. The explosion-proof film comprises, from top to bottom, a first release layer, an anti-fingerprint layer, an anti-UV layer, a substrate layer, a pressure-sensitive adhesive layer, and a second release layer. The anti-fingerprint layer is an epoxy resin layer containing a leveling agent, a coupling agent, and an additive; the anti-UV layer is a polydopamine layer containing modified cerium dioxide nanoparticles and a UV absorber; and the pressure-sensitive adhesive layer is a silicone pressure-sensitive adhesive layer. The present disclosure exhibits both UV-resistant and fingerprint-resistant properties. Furthermore, the tin / fluorine co-doped cerium dioxide nanoparticles provided by the present disclosure exhibit significantly greater UV resistance than those doped with tin or fluorine alone.

Description

Technical Field

[0001] The present disclosure relates to the field of thin film technology, and in particular to an anti-ultraviolet and anti-fingerprint explosion-proof film and a production process thereof. Background Art

[0002] To enhance the surface properties of PET film, improving its printability and the adhesion of the vacuum aluminum coating, corona treatment is commonly used to increase the film's surface tension. However, this method has issues such as time-to-effect, particularly in high-temperature and high-humidity environments, where the tension of the treated film readily decays. Chemical coating, however, avoids these issues and is therefore favored by the printing and aluminum coating industries. A range of PET chemical coating products has been developed: coating with water-soluble polymers can increase the surface tension of PET film; coating with acrylic emulsions improves printability (allowing the use of water-soluble inks); and coating with polyurethane aqueous solutions strengthens the adhesion of the aluminum coating to the PET base film and increases the thickness of the aluminum coating. Furthermore, coating can also be used to produce high-barrier and antistatic films.

[0003] However, the anti-fingerprint and anti-ultraviolet properties of this type of hardened film in the prior art are relatively poor. Summary of the Invention

[0004] The present disclosure provides an anti-ultraviolet and anti-fingerprint explosion-proof film and a production process thereof to address the deficiencies in the related art.

[0005] According to a first aspect of an embodiment of the present disclosure, there is provided an anti-ultraviolet and anti-fingerprint explosion-proof film, wherein the explosion-proof film is provided with:

[0006] a first release layer, an anti-fingerprint layer, an anti-ultraviolet layer, a substrate layer, a pressure-sensitive adhesive layer, and a second release layer;

[0007] The materials of the first release layer, the substrate layer and the second release layer are independently selected from any one of polyethylene terephthalate, polymethyl methacrylate, polycarbonate, polypropylene or polyethylene;

[0008] The anti-fingerprint layer is an epoxy resin layer containing a leveling agent, a coupling agent and an auxiliary agent;

[0009] The anti-ultraviolet layer is a polydopamine layer containing modified cerium dioxide nanoparticles and ultraviolet absorbers;

[0010] The pressure-sensitive adhesive layer is an organic silicone pressure-sensitive adhesive layer.

[0011] In one aspect of the embodiments of the present disclosure, the thickness of the first release layer is 25-100 μm; the thickness of the anti-fingerprint layer is 5-50 μm; the thickness of the anti-UV layer is 15-50 μm; the thickness of the substrate layer is 100-300 μm; the thickness of the pressure-sensitive adhesive layer is 30-70 μm; and the thickness of the second release layer is 25-100 μm.

[0012] In one aspect of the embodiments of the present disclosure, the material of the substrate layer is selected from polyethylene terephthalate; the material of the first release layer and the second release layer is selected from polymethyl methacrylate.

[0013] In one aspect of the embodiments of the present disclosure, the modified ceria nanoparticles are tin / fluorine co-doped ceria nanoparticles.

[0014] In one aspect of the embodiments of the present disclosure, the tin / fluorine co-doped cerium dioxide nanoparticles are prepared by the following steps:

[0015] Step 1-a: Weighing a cerium salt, adding it to an acidic solution, and maintaining stirring to obtain the solution of step 1-a;

[0016] Step 2-a: adding ammonium fluoride to the ammonium carbonate solution to obtain the solution of step 2-a;

[0017] Step 3-a: mixing the solution of step 1-a and the mixed solution of step 2-a, aging for 16-24 hours, and then filtering, washing, and drying to obtain a solid of step 3-a;

[0018] Step 4-a: adding the solid of step 3-a to a first organic solvent, adding acetylacetone, adding tin salt after stirring, aging for 16-24 hours after stirring, and then filtering, washing, and drying to obtain the solid of step 4-a;

[0019] Step 5-a: calcining the solid obtained in step 4-a at 450° C.-600° C. to obtain the tin / fluorine co-doped cerium dioxide nanoparticles.

[0020] In one aspect of the embodiments of the present disclosure, the cerium salt is selected from cerium carbonate, cerium nitrate or cerium chloride.

[0021] In one aspect of the disclosed embodiments, the acidic solution is selected from nitric acid or hydrochloric acid;

[0022] In one aspect of the embodiments of the present disclosure, the molar ratio of the ammonium fluoride to the cerium salt is selected from (0.1-0.4):1.

[0023] In one aspect of the embodiments of the present disclosure, the tin salt is selected from stannous chloride.

[0024] In one aspect of the embodiments of the present disclosure, preferably, the molar ratio of the tin salt to the cerium salt is selected from (0.15-0.35):1.

[0025] In one aspect of the embodiments of the present disclosure, based on the total weight of the anti-ultraviolet layer, the weight percentage of the tin / fluorine co-doped cerium dioxide nanoparticles is selected from 3.5% to 15%.

[0026] In one aspect of the embodiments of the present disclosure, the polydopamine layer further comprises an anti-ultraviolet compound.

[0027] According to a second aspect of an embodiment of the present disclosure, a process for preparing an explosion-proof membrane is provided, the process comprising the following steps:

[0028] Step 1-b: preparing tin / fluorine co-doped ceria nanoparticles;

[0029] Step 2-b: dissolving the anti-UV compound in a second organic solvent and stirring at 40° C.-55° C. for 4-8 hours; then adding dopamine hydrochloride, a buffer solution, and tin / fluorine co-doped cerium dioxide nanoparticles, and cooling to room temperature to obtain a first slurry;

[0030] Step 3-b: providing a substrate layer, coating the first slurry on one surface of the substrate layer, and obtaining an anti-ultraviolet layer after curing;

[0031] Step 4-b: dissolving the leveling agent, coupling agent, auxiliary agent and epoxy resin in a third organic solvent, heating to 80° C.-95° C., heating for 30-120 minutes, and then cooling to below 40° C. to obtain a second slurry;

[0032] Step 5-b: coating the second slurry onto the surface of the anti-ultraviolet layer away from the substrate layer, and obtaining an anti-fingerprint layer after curing.

[0033] In one aspect of the embodiments of the present disclosure, after the anti-fingerprint layer is prepared, the preparation process further includes the following steps:

[0034] Step 6-b: providing a first release layer on the surface of the anti-fingerprint layer away from the anti-ultraviolet layer;

[0035] Step 7-b: applying a silicone pressure-sensitive adhesive to the surface of the substrate layer away from the anti-ultraviolet layer, and curing the substrate to obtain a pressure-sensitive adhesive layer;

[0036] Step 8-b: Disposing a second release layer on the surface of the pressure-sensitive adhesive layer away from the substrate layer.

[0037] In one aspect of the embodiments of the present disclosure, the first organic solvent is selected from acetone, ethanol or methanol; the second organic solvent is selected from acetone, acetonitrile, N,N-dimethylformamide or dimethyl sulfoxide; the third organic solvent is selected from ethyl acetate, butyl acetate, 1,4-dioxane, diethyl ether, N,N-dimethylformamide or dimethyl sulfoxide.

[0038] The technical solutions provided by the embodiments of the present disclosure may have the following beneficial effects:

[0039] The present disclosure prepares an explosion-proof film with both anti-ultraviolet and anti-fingerprint properties, and compared with single doping of tin or fluorine, the tin / fluorine co-doped cerium dioxide nanoparticles provided by the present disclosure have significant anti-ultraviolet ability.

[0040] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0042] Figure 1 1 is a structural diagram of an explosion-proof membrane provided by the present disclosure, shown according to an exemplary embodiment.

[0043] Among them, 1-base material layer, 2-anti-ultraviolet layer, 3-anti-fingerprint layer, 4-first release layer, 5-pressure-sensitive adhesive layer, 6-second release layer. DETAILED DESCRIPTION

[0044] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0045] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0046] It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining."

[0047] like Figure 1 As shown, the explosion-proof film provided by the present disclosure is provided with, from top to bottom,: a first release layer 4, an anti-fingerprint layer 3, an anti-ultraviolet layer 2, a substrate layer 1, a pressure-sensitive adhesive layer 5 and a second release layer 6; wherein, the thickness of the substrate layer 1 is 100-300 μm; preferably 150-250 μm; the material of the substrate layer 1 is selected from any one of polyethylene terephthalate, polymethyl methacrylate, polycarbonate, polypropylene or polyethylene; specifically, the material of the substrate layer 1 is selected from polyethylene terephthalate.

[0048] The thickness of the first release layer 4 and the second release layer 6 is 25-100 μm, preferably 50-75 μm. The material of the first release layer 4 and the second release layer 6 is selected from any one of polyethylene terephthalate, polymethyl methacrylate, polycarbonate, polypropylene or polyethylene. Specifically, the material of the first release layer 4 and the second release layer 6 is selected from polymethyl methacrylate.

[0049] The anti-UV layer 2 is a polydopamine layer comprising tin / fluorine co-doped cerium dioxide nanoparticles and an anti-UV compound. Based on the total weight of the anti-UV layer, the weight percentage of the tin / fluorine co-doped cerium dioxide nanoparticles is selected from 3.5% to 15%, and the weight percentage of the anti-UV compound is selected from 2.5% to 8.5%. The anti-UV layer 2 has a thickness of 15 to 50 μm, preferably 25 to 40 μm.

[0050] In one aspect of the disclosed embodiments, the anti-UV compound is selected from one or more of benzotriazole compounds, triazine compounds, ester compounds, indole compounds, and pyrimidine compounds. Specifically, the anti-UV compound is selected from one or more of 384 (benzotriazole), CarboProtect (benzotriazole), 477 (triazine), Eusorb UV1990 (ester), BONASORB UA-3912 (indole), and FDB-009 (pyrimidine), but is not limited thereto.

[0051] The anti-fingerprint layer 3 comprises a leveling agent, a coupling agent, an additive, and an epoxy resin layer. The thickness of the anti-fingerprint layer 3 is 5-50 μm, preferably 15-35 μm. In one aspect of the present disclosure, the leveling agent is selected from, but not limited to, leveling agent HY-3600 or leveling agent BYK-361N. In one aspect of the present disclosure, the weight percentage of the leveling agent is selected from 0.3% to 1% based on the total weight of the anti-fingerprint layer 3.

[0052] In one aspect of the present disclosure, the coupling agent is selected from γ-aminopropyltrimethoxysilane or γ-aminopropyltriethoxysilane. In one aspect of the present disclosure, the weight percentage of the coupling agent is selected from 1.5% to 5% based on the total weight of the anti-fingerprint layer 3.

[0053] In one aspect of an embodiment of the present disclosure, the auxiliary agent is selected from triphenylsulfonium tetrafluoroborate, bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (BIS) and SiO2; wherein, based on the total weight of the anti-fingerprint layer 3, the weight percentage of triphenylsulfonium tetrafluoroborate is selected from 0.25%-0.5%; the weight percentage of bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate is selected from 0.15%-0.45%; and the weight percentage of SiO2 is selected from 0.45%-0.9%.

[0054] In one aspect of the embodiments of the present disclosure, the epoxy resin is selected from one or more of Syna Epoxy S-101, Syna-Epoxy 06E, and Syna-Epoxy 27.

[0055] The thickness of the pressure-sensitive adhesive layer 5 is 30-70 μm, preferably 50-65 μm. The material of the pressure-sensitive adhesive layer 5 is selected from silicone pressure-sensitive adhesive, and the specific material can be selected from DOWSIL TM 7268 or DOWSIL TM 789, but not limited thereto.

[0056] The present invention will be further described below by way of specific examples. The various chemical reagents used in the examples of the present invention were obtained through conventional commercial channels unless otherwise specified. Unless otherwise specified, the contents described below are all by weight. Unless otherwise specified, it is understood that the experiments were conducted at room temperature.

[0057] Example 1:

[0058] The first embodiment includes the following steps:

[0059] A. Preparation of Sn / F co-doped Ceria Nanoparticles:

[0060] Weigh 4.92 g of cerium chloride and add it to 1.5 mol / L nitric acid while stirring (350 rpm) to obtain a first solution; weigh 1.85 g of ammonium fluoride and add it to an appropriate amount of ammonium carbonate solution to obtain a second solution; mix the first solution and the second solution, age them for 18 hours, and then filter, wash, and dry them to obtain a solid;

[0061] The obtained solid was dissolved in 50 mL of ethanol, 2.5 mL of acetylacetone was added, and 0.76 SnCl2 was added after stirring. After stirring, the mixture was aged for 18 hours, and then filtered, washed, and dried to obtain a solid. The obtained solid was calcined at 550°C to obtain tin / fluorine co-doped cerium dioxide nanoparticles.

[0062] B. Preparation of the anti-ultraviolet and anti-fingerprint explosion-proof film of Example 1:

[0063] An anti-ultraviolet compound (0.35 g of 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-benzotriazole) was dissolved in 50 mL of acetone and stirred at 50° C. for 4 h. 9 g of dopamine hydrochloride, an appropriate amount of buffer, and 0.85 g of the tin / fluorine co-doped cerium dioxide nanoparticles prepared above were then added, and the mixture was stirred for another 4 h. The mixture was cooled to room temperature to obtain a first slurry.

[0064] Providing a polyethylene terephthalate substrate layer (225 μm), coating a first slurry on one surface of the substrate layer, and curing to obtain an anti-ultraviolet layer with a coating thickness of 40 μm;

[0065] A leveling agent (0.5 g BYK-361N), a coupling agent (1.0 g γ-aminopropyltrimethoxysilane), an auxiliary agent (0.35 g triphenylsulfonium tetrafluoroborate, 0.25 g bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate, 0.5 g SiO2) and an epoxy resin (96 g Syna Epoxy S-101) were dissolved in DMF, the temperature was raised to 90°C, heated for 60 minutes, and then cooled to below 40°C to obtain a second slurry.

[0066] The second slurry is coated on the surface of the anti-ultraviolet layer away from the substrate layer, and the anti-fingerprint layer is obtained after curing; the coating thickness is 30 μm.

[0067] A polymethyl methacrylate layer is coated on the surface of the anti-fingerprint layer away from the anti-ultraviolet layer; the thickness of the polymethyl methacrylate layer is 70 μm.

[0068] DOWSIL silicone pressure-sensitive adhesive TM7268 is coated on the surface of the substrate layer away from the anti-ultraviolet layer with a coating thickness of 50 μm, and a pressure-sensitive adhesive layer is obtained after curing; a polymethyl methacrylate layer is coated on the surface of the formed pressure-sensitive adhesive layer away from the substrate layer; the thickness of the polymethyl methacrylate layer is 70 μm; and the anti-ultraviolet and anti-fingerprint explosion-proof film of Example 1 is obtained.

[0069] Example 2:

[0070] The second embodiment includes the following steps:

[0071] A. Preparation of Sn / F co-doped Ceria Nanoparticles:

[0072] Weigh 4.92 g of cerium chloride and add it to 1.5 mol / L nitric acid while stirring (350 rpm) to obtain a first solution; weigh 3.7 g of ammonium fluoride and add it to an appropriate amount of ammonium carbonate solution to obtain a second solution; mix the first and second solutions, age them for 18 hours, and then filter, wash, and dry them to obtain a solid;

[0073] The obtained solid was dissolved in 50 mL of ethanol, 2.5 mL of acetylacetone was added, and 0.76 SnCl2 was added after stirring. After stirring, the mixture was aged for 18 hours, and then filtered, washed, and dried to obtain a solid. The obtained solid was calcined at 550°C to obtain tin / fluorine co-doped cerium dioxide nanoparticles.

[0074] B. Preparation of the anti-ultraviolet and anti-fingerprint explosion-proof film of Example 2:

[0075] An anti-ultraviolet compound (0.35 g of 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-benzotriazole) was dissolved in 50 mL of acetone and stirred at 50° C. for 4 h. 9 g of dopamine hydrochloride, an appropriate amount of buffer, and 0.85 g of the tin / fluorine co-doped cerium dioxide nanoparticles prepared above were then added, and the mixture was stirred for another 4 h. The mixture was cooled to room temperature to obtain a first slurry.

[0076] Providing a polyethylene terephthalate substrate layer (225 μm), coating a first slurry on one surface of the substrate layer, and curing to obtain an anti-ultraviolet layer with a coating thickness of 40 μm;

[0077] A leveling agent (0.5 g BYK-361N), a coupling agent (1.0 g γ-aminopropyltrimethoxysilane), an auxiliary agent (0.35 g triphenylsulfonium tetrafluoroborate, 0.25 g bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate, 0.5 g SiO2) and an epoxy resin (96 g Syna Epoxy S-101) were dissolved in DMF, the temperature was raised to 90°C, heated for 60 minutes, and then cooled to below 40°C to obtain a second slurry.

[0078] The second slurry is coated on the surface of the anti-ultraviolet layer away from the substrate layer, and the anti-fingerprint layer is obtained after curing; the coating thickness is 30 μm.

[0079] A polymethyl methacrylate layer is coated on the surface of the anti-fingerprint layer away from the anti-ultraviolet layer; the thickness of the polymethyl methacrylate layer is 70 μm.

[0080] DOWSIL silicone pressure-sensitive adhesive TM 7268 is coated on the surface of the substrate layer away from the anti-ultraviolet layer with a coating thickness of 50 μm, and a pressure-sensitive adhesive layer is obtained after curing; a polymethyl methacrylate layer is coated on the surface of the formed pressure-sensitive adhesive layer away from the substrate layer; the thickness of the polymethyl methacrylate layer is 70 μm; and the anti-ultraviolet and anti-fingerprint explosion-proof film of Example 2 is obtained.

[0081] Example 3:

[0082] The steps of Example 3 are basically the same as those of Example 1, except that the weight of ammonium fluoride used in Example 3 is 5.55 g.

[0083] Example 4:

[0084] The steps of Example 4 are basically the same as those of Example 1, except that the weight of ammonium fluoride used in Example 4 is 0.74 g.

[0085] Embodiment 5:

[0086] The steps of Example 5 are basically the same as those of Example 1, except that the weight of SnCl2 used in Example 5 is 1.52 g.

[0087] Example 6:

[0088] The steps of Example 6 are basically the same as those of Example 1, except that the weight of SnCl2 used in Example 6 is 2.28 g.

[0089] Embodiment seven:

[0090] The steps of Example 7 are basically the same as those of Example 1, except that the weight of SnCl2 used in Example 7 is 0.38 g.

[0091] Comparative Example 1:

[0092] A. Preparation of fluorine-doped ceria nanoparticles:

[0093] Weigh 4.92 g of cerium chloride and add it to 1.5 mol / L nitric acid, maintaining stirring at 350 r / min; obtain a first solution; weigh 3.7 g of ammonium fluoride and add it to an appropriate amount of ammonium carbonate solution to obtain a second solution; mix the first solution and the second solution, age for 18 hours, and then filter, wash, and dry to obtain a solid; the obtained solid is calcined at 550°C to obtain fluorine-doped cerium dioxide nanoparticles.

[0094] B. Preparation of the anti-ultraviolet and anti-fingerprint explosion-proof film of Comparative Example 1:

[0095] An anti-ultraviolet compound (0.35 g of 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-benzotriazole) was dissolved in 50 mL of acetone and stirred at 50° C. for 4 h. 9 g of dopamine hydrochloride, an appropriate amount of buffer, and 0.85 g of the tin / fluorine co-doped cerium dioxide nanoparticles prepared above were then added, and the mixture was stirred for another 4 h. The mixture was cooled to room temperature to obtain a first slurry.

[0096] Providing a polyethylene terephthalate substrate layer (225 μm), coating a first slurry on one surface of the substrate layer, and curing to obtain an anti-ultraviolet layer with a coating thickness of 40 μm;

[0097] A leveling agent (0.5 g BYK-361N), a coupling agent (1.0 g γ-aminopropyltrimethoxysilane), an auxiliary agent (0.35 g triphenylsulfonium tetrafluoroborate, 0.25 g bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate, 0.5 g SiO2) and an epoxy resin (96 g Syna Epoxy S-101) were dissolved in DMF, the temperature was raised to 90°C, heated for 60 minutes, and then cooled to below 40°C to obtain a second slurry.

[0098] The second slurry is coated on the surface of the anti-ultraviolet layer away from the substrate layer, and the anti-fingerprint layer is obtained after curing; the coating thickness is 30 μm.

[0099] A polymethyl methacrylate layer is coated on the surface of the anti-fingerprint layer away from the anti-ultraviolet layer; the thickness of the polymethyl methacrylate layer is 70 μm.

[0100] DOWSIL silicone pressure-sensitive adhesive TM 7268 is coated on the surface of the substrate layer away from the anti-ultraviolet layer with a coating thickness of 50 μm, and a pressure-sensitive adhesive layer is obtained after curing; a polymethyl methacrylate layer is coated on the surface of the formed pressure-sensitive adhesive layer away from the substrate layer; the thickness of the polymethyl methacrylate layer is 70 μm; and the anti-ultraviolet and anti-fingerprint explosion-proof film of comparative example 1 is obtained.

[0101] Comparative Example 2:

[0102] A. Preparation of tin-doped ceria nanoparticles:

[0103] 4.92 g of cerium chloride was weighed and added to 50 mL of ethanol, 2.5 mL of acetylacetone was added, and 0.76 SnCl2 was added after stirring. After stirring, the mixture was aged for 18 h, and then filtered, washed, and dried to obtain a solid. The obtained solid was calcined at 550°C to obtain tin-doped cerium dioxide nanoparticles.

[0104] B. Preparation of the anti-ultraviolet and anti-fingerprint explosion-proof film of Comparative Example 2:

[0105] An anti-ultraviolet compound (0.35 g of 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-benzotriazole) was dissolved in 50 mL of acetone and stirred at 50° C. for 4 h. 9 g of dopamine hydrochloride, an appropriate amount of buffer, and 0.85 g of the tin / fluorine co-doped cerium dioxide nanoparticles prepared above were then added, and the mixture was stirred for another 4 h. The mixture was cooled to room temperature to obtain a first slurry.

[0106] Providing a polyethylene terephthalate substrate layer (225 μm), coating a first slurry on one surface of the substrate layer, and curing to obtain an anti-ultraviolet layer with a coating thickness of 40 μm;

[0107] A leveling agent (0.5 g BYK-361N), a coupling agent (1.0 g γ-aminopropyltrimethoxysilane), an auxiliary agent (0.35 g triphenylsulfonium tetrafluoroborate, 0.25 g bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate, 0.5 g SiO2) and an epoxy resin (96 g Syna Epoxy S-101) were dissolved in DMF, the temperature was raised to 90°C, heated for 60 minutes, and then cooled to below 40°C to obtain a second slurry.

[0108] The second slurry is coated on the surface of the anti-ultraviolet layer away from the substrate layer, and the anti-fingerprint layer is obtained after curing; the coating thickness is 30 μm.

[0109] A polymethyl methacrylate layer is coated on the surface of the anti-fingerprint layer away from the anti-ultraviolet layer; the thickness of the polymethyl methacrylate layer is 70 μm.

[0110] DOWSIL silicone pressure-sensitive adhesive TM 7268 is coated on the surface of the substrate layer away from the anti-ultraviolet layer with a coating thickness of 50 μm, and a pressure-sensitive adhesive layer is obtained after curing; a polymethyl methacrylate layer is coated on the surface of the formed pressure-sensitive adhesive layer away from the substrate layer; the thickness of the polymethyl methacrylate layer is 70 μm; and the anti-ultraviolet and anti-fingerprint explosion-proof film of comparative example 2 is obtained.

[0111] Elemental analysis: The cerium dioxide nanoparticles obtained in the examples and comparative examples were tested by inductively coupled plasma optical emission spectrometry (ICP-OES), and the element ratios of tin and fluorine were given. The test results are shown in Table 1 below.

[0112] UV absorbance and b* value testing: A spectrophotometer (Konica, Japan, Model CM-5) was used to test the UV transmittance and CIELAB values under transparent conditions. The test results are shown in Table 1 below.

[0113] Table 1

[0114]

[0115] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein.

Claims

1. An anti-ultraviolet and anti-fingerprint explosion-proof film, characterized in that: The explosion-proof membrane is provided with: a first release layer, an anti-fingerprint layer, an anti-ultraviolet layer, a substrate layer, a pressure-sensitive adhesive layer, and a second release layer; The materials of the first release layer, the substrate layer and the second release layer are independently selected from any one of polyethylene terephthalate, polymethyl methacrylate, polycarbonate, polypropylene or polyethylene; The anti-fingerprint layer is an epoxy resin layer containing a leveling agent, a coupling agent and an auxiliary agent; The anti-ultraviolet layer is a polydopamine layer containing modified cerium dioxide nanoparticles and ultraviolet absorbers; The pressure-sensitive adhesive layer is an organic silicone pressure-sensitive adhesive layer; The modified cerium dioxide nanoparticles are tin / fluorine co-doped cerium dioxide nanoparticles; The tin / fluorine co-doped cerium dioxide nanoparticles are prepared by the following steps: Step 1-a: Weighing a cerium salt, adding it to an acidic solution, and maintaining stirring to obtain the solution of step 1-a; Step 2-a: adding ammonium fluoride to the ammonium carbonate solution to obtain the solution of step 2-a; Step 3-a: mixing the solution of step 1-a and the mixed solution of step 2-a, aging for 16-24 hours, and then filtering, washing, and drying to obtain a solid of step 3-a; Step 4-a: adding the solid of step 3-a to a first organic solvent, adding acetylacetone, adding tin salt after stirring, aging for 16-24 hours after stirring, and then filtering, washing, and drying to obtain the solid of step 4-a; Step 5-a: calcining the solid obtained in step 4-a at 450° C.-600° C. to obtain the tin / fluorine co-doped cerium dioxide nanoparticles.

2. The explosion-proof membrane according to claim 1, characterized in that: The thickness of the first release layer is 25-100 μm; the thickness of the anti-fingerprint layer is 5-50 μm; the thickness of the anti-ultraviolet layer is 15-50 μm; the thickness of the substrate layer is 100-300 μm; the thickness of the pressure-sensitive adhesive layer is 30-70 μm; and the thickness of the second release layer is 25-100 μm.

3. The explosion-proof membrane according to claim 1, characterized in that: The material of the substrate layer is selected from polyethylene terephthalate; the materials of the first release layer and the second release layer are selected from polymethyl methacrylate.

4. The explosion-proof membrane according to claim 1, characterized in that: Steps 1-a to 5-a satisfy at least one of the following conditions: (1) The cerium salt is selected from cerium carbonate, cerium nitrate or cerium chloride; (2) The acidic solution is selected from nitric acid or hydrochloric acid; (3) The molar ratio of ammonium fluoride to cerium salt is selected from (0.1-0.4):1; (4) The tin salt is selected from stannous chloride; (5) The molar ratio of the tin salt to the cerium salt is selected from (0.15-0.35):

1.

5. The explosion-proof membrane according to claim 1, characterized in that: Based on the total weight of the anti-ultraviolet layer, the weight percentage of the tin / fluorine co-doped cerium dioxide nanoparticles is selected from 3.5% to 15%.

6. A process for preparing an explosion-proof membrane according to any one of claims 1 to 5, characterized in that: The preparation process comprises the following steps: Step 1-b: preparing tin / fluorine co-doped ceria nanoparticles; Step 2-b: dissolving the UV absorber in a second organic solvent and stirring at 40° C.-55° C. for 4-8 hours; then adding dopamine hydrochloride, a buffer solution, and tin / fluorine co-doped cerium dioxide nanoparticles, and cooling to room temperature to obtain a first slurry; Step 3-b: providing a substrate layer, coating the first slurry on one surface of the substrate layer, and obtaining an anti-ultraviolet layer after curing; Step 4-b: dissolving the leveling agent, coupling agent, auxiliary agent and epoxy resin in a third organic solvent, heating to 80° C.-95° C., heating for 30-120 minutes, and then cooling to below 40° C. to obtain a second slurry; Step 5-b: coating the second slurry onto the surface of the anti-ultraviolet layer away from the substrate layer, and obtaining an anti-fingerprint layer after curing.

7. The process for preparing the explosion-proof membrane according to claim 6, characterized in that: After the anti-fingerprint layer is prepared, the preparation process further comprises the following steps: Step 6-b: providing a first release layer on the surface of the anti-fingerprint layer away from the anti-ultraviolet layer; Step 7-b: applying a silicone pressure-sensitive adhesive to the surface of the substrate layer away from the anti-ultraviolet layer, and curing the substrate to obtain a pressure-sensitive adhesive layer; Step 8-b: Disposing a second release layer on the surface of the pressure-sensitive adhesive layer away from the substrate layer.

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