Antibacterial anti-dazzle screen film

Abstract

The invention discloses an antibacterial anti-dazzle screen film which comprises a base material layer, an anti-dazzle layer, an antibacterial layer and an antifouling layer which are sequentially arranged from bottom to top, the antibacterial layer is a zinc oxide and silicon oxide mixed plating layer, and the content ratio of zinc oxide to silicon oxide is (5-9): (5-1). According to the antibacterial anti-dazzle screen film, the antibacterial layer is arranged, and zinc oxide and silicon oxide are added into the antibacterial layer, so that the antibacterial anti-dazzle screen film has a good antibacterial effect and is lower in manufacturing cost. Due to the arrangement of the anti-dazzle layer, the screen film has an anti-dazzle effect while being antibacterial. In addition, due to the arrangement of the anti-fouling layer, the anti-bacterial effect of the anti-bacterial layer can be prolonged, and the scratch resistance and the anti-fouling performance of the screen can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of film materials, and in particular relates to an antibacterial and anti-glare screen film. Background Art

[0002] With the continuous development of science and technology, mobile phones and tablets have become an indispensable part of modern life. They have evolved from the original communication tools to a powerful aggregate. While providing convenience, mobile phones and tablets have also unknowingly become a breeding ground for bacteria. According to surveys and studies, mobile phones are used the longest in daily life, reaching more than 5 hours, followed by tablets and computers. With high-frequency use, tablets and computers also bring many negative effects. With high-frequency contact between fingers and screens, various bacteria will inevitably adhere to the screen surface, especially for medical staff, the environment is more complicated.

[0003] At present, most of the antibacterial layers used in the market are nano-Ag ions. Although silver ions have excellent antibacterial effects, there are also some problems. First, the antibacterial effect of silver ions may be weakened due to corrosion and oxidation from sweat on fingers during long-term use, and the transmittance of the coating may be reduced due to oxidation and blackening. Second, the cost of silver ions is high, which may limit the feasibility of its widespread application in the market. In addition, the antifouling and scratch resistance of existing antibacterial films are also insufficient.

[0004] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0005] The object of the present invention is to provide an antibacterial anti-glare screen film, which has good antibacterial effect and lower cost.

[0006] In order to achieve the above-mentioned purpose, a specific embodiment of the present invention provides an antibacterial anti-glare screen film, which includes a substrate layer, an anti-glare layer, an antibacterial layer and an anti-fouling layer arranged in sequence from bottom to top; the antibacterial layer is a mixed coating of zinc oxide and silicon oxide, and the content ratio of the zinc oxide to the silicon oxide is between (5-9): (5-1).

[0007] In one or more embodiments of the present invention, the antibacterial layer is magnetron sputtered on the anti-glare layer, and the thickness of the antibacterial layer is between 20 nm and 30 nm.

[0008] In one or more embodiments of the present invention, the anti-glare layer is coated on the substrate layer by precision wet coating, the anti-glare layer includes inorganic particles and organic particles, and the anti-glare layer is configured to have a haze between 5% and 20%.

[0009] In one or more embodiments of the present invention, the content ratio of the inorganic particles to the organic particles is 9:(5-8).

[0010] In one or more embodiments of the present invention, the inorganic particles are selected from one or more of silicon oxide, aluminum oxide and titanium oxide.

[0011] In one or more embodiments of the present invention, the organic particles are selected from one or more of PMMA, PE and PC.

[0012] In one or more embodiments of the present invention, the thickness of the anti-glare layer is between 3 μm and 6 μm.

[0013] In one or more embodiments of the present invention, the substrate layer is selected from one of PET, TAC, SRF, and PC.

[0014] In one or more embodiments of the present invention, the thickness of the substrate layer is between 20 μm and 125 μm.

[0015] In one or more embodiments of the present invention, the anti-fouling layer is a fluorosilicone polymer layer; the thickness of the anti-fouling layer is between 10nm and 20nm.

[0016] Compared with the prior art, the antibacterial and anti-glare screen film of the present invention has an antibacterial layer and adds zinc oxide and silicon oxide to the antibacterial layer. Zinc oxide has a good antibacterial effect, and silicon oxide can be combined with zinc oxide, so that the manufacturing cost of the entire antibacterial and anti-glare screen film is lower, and the anti-fouling layer can be better attached to the antibacterial layer. The anti-glare layer is provided so that the screen film can have an anti-glare effect while being antibacterial. In addition, the provision of the anti-fouling layer can not only prolong the antibacterial effect of the antibacterial layer but also improve the scratch resistance and anti-fouling performance of the screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 Schematic diagram of an antibacterial anti-glare screen film in one embodiment of the present invention.

[0019] Description of main reference numerals:

[0020] 1- substrate layer, 2- anti-glare layer, 3- antibacterial layer, 4- anti-fouling layer. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0022] like Figure 1 As shown, an antibacterial anti-glare screen film in one embodiment of the present invention comprises a substrate layer 1, an anti-glare layer 2, an antibacterial layer 3 and an antifouling layer 4 arranged in sequence from bottom to top. The antibacterial layer 3 is a mixed coating of zinc oxide and silicon oxide, and the content ratio of zinc oxide to silicon oxide is between (5-9): (5-1).

[0023] Most of the existing antibacterial films and other antibacterial materials use nano-Ag ions as antibacterial substances. Antibacterial films using silver ions have excellent antibacterial effects, but there are also some problems. On the one hand, silver ions may weaken their antibacterial effects due to corrosion and oxidation from sweat on fingers during long-term use, and oxidation and blackening may reduce the transmittance of the coating and affect the light transmittance of the protective film; on the other hand, the high cost of silver ions will increase the manufacturing cost of the protective film. In the above embodiment, the antibacterial and anti-glare screen film of the present invention can play a good antibacterial role through the antibacterial layer 3.

[0024] The antibacterial layer 3 is a mixed coating of zinc oxide and silicon oxide. Zinc oxide has a good antibacterial effect. It can release ions and cell membranes, oxidative stress and enzyme activity inhibition, etc. The released zinc ions can affect the metabolism and growth of bacteria, and the zinc oxide particles have a physical effect on the bacterial cell membrane, thereby destroying the bacterial structure and inducing oxidative stress, and finally inhibiting the growth and reproduction of bacteria. The antibacterial effect of zinc oxide can effectively inhibit the growth of various bacteria, fungi and viruses, including drug-resistant strains, and is suitable for electronic displays, medical equipment, food packaging and other fields. At the same time, zinc oxide performs well in safety and has little impact on the human body and the environment. In addition, the stability and versatility of zinc oxide also provide guarantees for its wide application. At the same time, compared with other high-cost materials, zinc oxide has a lower cost, and the simple preparation method makes it have good market feasibility.

[0025] Silicon oxide is widely used in optical and electronic devices due to its excellent low dielectric constant, heat preservation, corrosion resistance and anti-reflection properties. In addition, silicon oxide has been used in biomedical applications due to its biocompatibility, biodegradability and non-toxicity. The content ratio of zinc oxide to silicon oxide is controlled between (5-9): (5-1) by controlling the sputtering power of the zinc target and the silicon target. On the one hand, the presence of silicon dioxide can provide hydroxyl groups (Si-OH), so that the main reactive groups in the antifouling layer 4 react with it to produce a condensation reaction. On the other hand, the presence of silicon oxide can greatly improve the mechanical toughness of zinc oxide, and silicon oxide is often used as a low reflectivity material, which can improve the transmittance of the film material.

[0026] In one embodiment, the antibacterial layer 3 is magnetron sputtered on the anti-glare layer 2 , and the thickness of the antibacterial layer 3 is between 20 nm and 30 nm.

[0027] In one embodiment, the surface of the substrate layer 1 is coated with an anti-glare layer 2 by a precision wet coating process. Since the anti-glare layer 2 is too thick and may affect the haze of the entire antibacterial anti-glare screen film, increase the manufacturing cost, and affect the bending performance of the substrate layer 1, the thickness of the anti-glare layer 2 is controlled between 3μm-6μm. Furthermore, the anti-glare layer 2 controls the haze of the anti-glare layer 2 by adding inorganic particles and organic particles to control the haze of the anti-glare layer 2 between 5% and 20%. Too high haze will cause the film surface to turn white, affecting the user's experience. In order to ensure the anti-glare effect while taking into account the haze of the film material, the content ratio of inorganic particles to organic particles in the anti-glare layer 2 is between 9: (5-8). Among them, the inorganic particles are selected from one or more of silicon oxide, aluminum oxide, and titanium oxide. The organic particles are selected from one or more of PMMA, PE and PC.

[0028] The surface of the antibacterial layer 3 can also be sprayed with an antifouling layer 4 to reduce the impact of substances in the air on the antibacterial layer 3 and improve the antifouling ability of the entire membrane. The antifouling layer 4 can be a fluorosilicone polymer layer, which can increase the wear resistance and antifouling properties of the membrane surface and make the outer surface of the membrane easy to clean. Specifically, it can be made from the antifouling spray liquid developed by Suzhou Ruikang Vacuum Technology Co., Ltd. The thickness is between 10nm-20nm.

[0029] Since the antibacterial anti-glare screen film is mainly used in application scenarios that require high light transmittance or high definition, its substrate layer 1 needs to be selected from a material with a total light transmittance of more than 90%. In one embodiment, the substrate layer 1 is selected from one of PET, TAC, SRF, and PC, and its thickness is between 20μm and 125μm. In addition, an anti-glare layer 2 is provided on one surface of the substrate layer 1, and an optical adhesive layer can be provided on the other surface for bonding to a surface such as a screen.

[0030] The present invention is further described below in conjunction with specific embodiments and comparative examples.

[0031] Embodiment 1:

[0032] Substrate layer 1: TAC substrate, thickness 60μm; anti-glare layer 2: thickness 4μm, the ratio of organic particles and inorganic particles is: 9:5, and the haze is controlled at about 5%; antibacterial layer 3: the content ratio of zinc oxide and silicon oxide is: 5:5, and the thickness is controlled at 20nm; anti-fouling layer 4: thickness 15nm.

[0033] Embodiment 2:

[0034] Substrate layer 1: TAC substrate, thickness 60μm; anti-glare layer 2: thickness 4μm, the ratio of organic particles and inorganic particles is: 9:6; the haze is controlled at about 12%, antibacterial layer 3: the content ratio of zinc oxide and silicon oxide is: 7:3, the thickness is controlled at 20nm; anti-fouling layer 4: thickness 15nm.

[0035] Embodiment 3:

[0036] Substrate layer 1: TAC substrate, thickness 60μm; anti-glare layer 2: thickness 4μm, the ratio of organic particles and inorganic particles is: 9:8; the haze is controlled at about 20%, antibacterial layer 3: the content ratio of zinc oxide and silicon oxide is: 9:1, the thickness is controlled at 30nm; anti-fouling layer 4: thickness 15nm.

[0037] Comparative Example 1:

[0038] Substrate layer: TAC substrate, thickness 60μm; anti-glare layer: thickness selected 4μm, the ratio of organic particles and inorganic particles is: 9:5, and the haze is controlled at 5%; anti-fouling layer: thickness 15nm.

[0039] Comparative Example 2:

[0040] Substrate layer: TAC substrate, thickness 60μm, anti-glare layer: thickness selected 4μm, the ratio of organic particles and inorganic particles is: 9:5, and the haze is controlled at 5%; antibacterial layer: the content ratio of zinc oxide and silicon oxide is: 10:0, and the thickness is controlled at 20nm.

[0041] Comparative Example 3:

[0042] Substrate layer: TAC substrate, thickness 60μm; anti-glare layer: thickness 4μm, the ratio of organic particles and inorganic particles is: 9:5, and the haze is controlled at about 5%; antibacterial layer: the content ratio of zinc oxide and silicon oxide is: 0:10, and the thickness is controlled at 20nm; anti-fouling layer: thickness 15nm.

[0043] Comparative Example 4:

[0044] Substrate layer: TAC substrate, thickness 60μm; anti-glare layer: thickness 4μm, the ratio of organic particles and inorganic particles is: 9:5, and the haze is controlled at about 5%; antibacterial layer: the content ratio of zinc oxide and silicon oxide is: 3:7, and the thickness is controlled at 20nm; anti-fouling layer: thickness 15nm.

[0045] The antibacterial anti-glare screen film of Examples 1-4 and the screen film of Comparative Example 1-2 were subjected to antibacterial tests, and the total light transmittance (TT) and haze (Haze) were measured. Among them, the antibacterial test was carried out according to the national standard GB4789.2-2016. The test method is: after the sample is sterilized by steam in an autoclave, it is placed in a test tube according to the sample grouping, and sterilized by irradiation with a UV lamp. Dilute the bacterial solution to 106CFU / mL with a liquid culture medium, add 7mL of the diluted bacterial solution to the corresponding test tube, and ensure that the bacterial solution covers the sample. Oscillate and culture in a constant temperature oscillator at 37°C for 6h, and use a UV lamp (peak wavelength 365nm) for continuous irradiation during the culture process. After the culture is completed, the bacterial solution is diluted 10 times continuously with sterile phosphate buffer. Take 100μL of the dilution and evenly spread it on the solid culture medium, place it in a constant temperature incubator at 37°C for 18h, take it out, take a picture and record the number of colonies. The total light transmittance (TT) and haze are tested by a haze meter according to the ASTM D1003 standard.

[0046] The test results are shown in Table 1 below.

[0047] Table 1 Test results of the antibacterial anti-glare screen films of Examples 1-4 and the screen films of Comparative Examples 1-2

[0048]

[0049] As can be seen from the table above, the antibacterial anti-glare screen films of Examples 1-3 have good antibacterial effects while also taking into account good light transmittance and haze. Although Comparative Example 2 also has a bactericidal effect, due to the lack of silicon oxide, its mechanical stability and optical properties are greatly reduced, and due to the lack of silicon dioxide, the antifouling layer 4 cannot adhere to the antibacterial layer 3. The proportion of zinc oxide in Comparative Example 4 is too low, and the antibacterial effect is less than 90, which is not suitable for practical use.

[0050] In summary, the antibacterial and anti-glare screen film of the present invention has good antibacterial effect and lower manufacturing cost by providing the antibacterial layer 3 and adding zinc oxide and silicon oxide to the antibacterial layer 3. The provision of the anti-glare layer 2 enables the screen film to have an anti-glare effect while being antibacterial. In addition, the provision of the anti-fouling layer 4 can not only prolong the antibacterial effect of the antibacterial layer 3 but also improve the scratch resistance and anti-fouling performance of the screen.

[0051] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and range of equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0052] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An antibacterial anti-glare screen film, characterized in that: It includes a substrate layer, an anti-glare layer, an antibacterial layer and an antifouling layer arranged in sequence from bottom to top; The antibacterial layer is a mixed coating of zinc oxide and silicon oxide, and the content ratio of the zinc oxide to the silicon oxide is between (5-9): (5-1).

2. The antibacterial anti-glare screen film according to claim 1, characterized in that: The antibacterial layer is magnetron sputtered on the anti-glare layer, and the thickness of the antibacterial layer is between 20nm and 30nm.

3. The antibacterial anti-glare screen film according to claim 1, characterized in that: The anti-glare layer is coated on the substrate layer by a precision wet coating method, the anti-glare layer comprises inorganic particles and organic particles, and the anti-glare layer is configured to have a haze between 5% and 20%.

4. The antibacterial anti-glare screen film according to claim 3, characterized in that: The content ratio of the inorganic particles to the organic particles is 9:(5-8).

5. The antibacterial anti-glare screen film according to claim 3, characterized in that: The inorganic particles are selected from one or more of silicon oxide, aluminum oxide and titanium oxide.

6. The antibacterial anti-glare screen film according to claim 3, characterized in that: The organic particles are selected from one or more of PMMA, PE and PC.

7. The antibacterial anti-glare screen film according to claim 1, characterized in that: The thickness of the anti-glare layer is between 3 μm and 6 μm.

8. The antibacterial anti-glare screen film according to claim 1, characterized in that: The substrate layer is selected from one of PET, TAC, SRF and PC.

9. The antibacterial anti-glare screen film according to claim 1, characterized in that: The thickness of the substrate layer is between 20 μm and 125 μm.

10. The antibacterial anti-glare screen film according to claim 1, characterized in that: The antifouling layer is a fluorosilicone polymer layer; the thickness of the antifouling layer is between 10nm and 20nm.

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