Antifouling antibacterial window film

Abstract

The utility model discloses an antifouling antibacterial window film, which comprises a base material composite layer, which is provided with a first surface and a second surface which are opposite to each other along the layer thickness and comprises a plurality of PET (Polyethylene Terephthalate) unit layers; the antibacterial surface layer is arranged on the first surface; the mounting adhesive layer is arranged on the second surface; the surface, away from the base material composite layer, of the antibacterial surface layer is provided with anti-fouling protrusions, and the base material composite layer comprises a photochromic layer and / or a heat insulation layer. The antifouling and antibacterial window film is reasonable in structure, tiny concave-convex structure textures are formed through the antifouling protrusions arranged on the surface of the antibacterial surface layer, the contact area of dirt can be reduced, and therefore the adhesive force of the dirt is reduced; in combination with the antibacterial surface layer, the growth of microorganisms can be inhibited, stains caused by the microorganisms can be reduced, and the anti-fouling performance is indirectly improved; and through the photochromic layer and / or the heat insulation layer arranged on the base material composite layer, the window film is endowed with an energy-saving function, and the application scene of the window film is widened.

Description

Technical Field

[0001] The utility model relates to the technical field of window films, in particular to an antifouling and antibacterial window film. Background Art

[0002] Window film refers to the film pasted on the surface of automobile glass or architectural glass. Conventional window film includes a base material layer, an installation adhesive layer and a release layer. However, window film is easily scratched and contaminated, and bacteria, oil stains, etc. can damage the surface of the window film.

[0003] Patent CN209368177U discloses a window film that, from top to bottom, includes a removable antibacterial layer, an antifouling layer, a first substrate layer, an adhesive layer for mounting, and a release layer. The adhesive layer for mounting is a water-based adhesive layer. The window film also includes a removable vapor barrier layer disposed on the water-based adhesive layer. The antibacterial layer has a fuzzy structure on its surface, with a height of 0.01-2μm. Although the window film has antibacterial properties, nano-titanium dioxide must be exposed to light to exert its antibacterial activity. Furthermore, the atomic oxygen decomposed by light decomposes the film-forming material of the antibacterial layer, causing the performance of the antibacterial layer to degrade. Furthermore, the antifouling layer is a secondary outer layer and cannot directly and effectively exert its antifouling properties.

[0004] Therefore, it is necessary to improve the antifouling and antibacterial window film in the prior art. Utility Model Content

[0005] The purpose of the utility model is to overcome the defects existing in the prior art and provide an antifouling and antibacterial window film. The antifouling protrusions arranged on the surface of the antibacterial surface layer form a tiny concave-convex structure texture, which can reduce the contact area of ​​dirt and thus reduce the adhesion of dirt; the antibacterial surface layer can inhibit the growth of microorganisms and reduce stains caused by microorganisms, thereby indirectly improving the antifouling performance; and the photochromic layer and / or thermal insulation layer arranged on the substrate composite layer can give the window film an energy-saving function, thereby broadening the application scenarios of the window film.

[0006] To achieve the above technical effects, the technical solution of the present invention is: an antifouling and antibacterial window film, comprising:

[0007] A substrate composite layer having a first surface and a second surface opposite to each other along the thickness of the layer, and comprising a plurality of PET unit layers;

[0008] an antibacterial surface layer disposed on the first surface;

[0009] An installation adhesive layer is provided on the second surface;

[0010] The antibacterial surface layer is provided with antifouling protrusions on a surface away from the substrate composite layer, and the substrate composite layer includes a photochromic layer and / or a heat insulation layer.

[0011] A preferred technical solution is that the substrate composite layer further includes an antibacterial unit layer and / or an anti-ultraviolet unit layer, and the substrate composite layer is a stacked structure of an antibacterial unit layer / photochromic layer / anti-ultraviolet unit layer, or a photochromic layer / anti-ultraviolet unit layer / thermal insulation layer, or an antibacterial unit layer / photochromic layer / thermal insulation layer, and the antibacterial unit layer or photochromic layer is close to the antibacterial surface layer.

[0012] A preferred technical solution is that a bending-resistant layer is provided between the substrate composite layer and the antibacterial surface layer, and / or between the substrate composite layer and the mounting adhesive layer.

[0013] A preferred technical solution is that the bending-resistant layer is a thermoplastic polyurethane layer, and the antibacterial surface layer is made of polyurethane.

[0014] A preferred technical solution is that the photochromic material of the photochromic layer is an organic compound of the spironaphthol oxazine or naphthol pyran type.

[0015] A preferred technical solution is that the thermal insulation material of the thermal insulation layer is ceramic nanoparticles.

[0016] The preferred technical solution is that the antibacterial agent of the antibacterial surface layer is an organic polymer antibacterial agent; the antibacterial agent of the antibacterial unit layer is a silver-based, zinc-based and copper-based antibacterial agent.

[0017] A preferred technical solution is that the anti-fouling protrusions are silica particles modified by fluorinated polymers, silane coupling agents or surfactants.

[0018] A preferred technical solution is that the mounting adhesive layer is one of a polyurethane adhesive layer, an acrylate adhesive layer and an organic silicone adhesive layer.

[0019] A preferred technical solution is that an antistatic release film is provided on the surface of the mounting adhesive layer away from the substrate composite layer.

[0020] The advantages and beneficial effects of the utility model are:

[0021] The antifouling and antibacterial window film has a reasonable structure. The antifouling protrusions arranged on the surface of the antibacterial surface layer form a tiny concave-convex structure texture, which can reduce the contact area of ​​dirt and thus reduce the adhesion of dirt. The antibacterial surface layer can inhibit the growth of microorganisms and reduce stains caused by microorganisms, thereby indirectly improving the antifouling performance. The photochromic layer and / or thermal insulation layer arranged on the substrate composite layer can give the window film an energy-saving function, thereby broadening the application scenarios of the window film. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of Example 1 of the antifouling and antibacterial window film of the present invention;

[0023] Figure 2This is a schematic structural diagram of Example 1 of the antifouling and antibacterial window film of the present invention;

[0024] Figure 3 yes Figure 2 A partial enlarged view of middle A.

[0025] In the figure: 1. Base material composite layer; 2. Antibacterial surface layer; 3. Installation adhesive layer; 4. Bending-resistant layer; 5. Antistatic release film; 10. Connecting adhesive layer; 11. Photochromic layer; 12. Thermal insulation layer; 13. Antibacterial unit layer; 14. Anti-ultraviolet unit layer; 20. Anti-fouling protrusions. DETAILED DESCRIPTION

[0026] The following embodiments are used to further describe the specific embodiments of the present invention in conjunction with the accompanying drawings and examples. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0027] The terms "surface" and "inner surface" are based on the normal use state of the anti-fouling and antibacterial window film and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.

[0028] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified with "first," "second," etc., may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means two or more.

[0029] The antifouling and antibacterial window film of the present invention includes a substrate composite layer 1, an antibacterial surface layer 2 and an installation adhesive layer 3. The substrate composite layer 1 has a first surface (unmarked) and a second surface (unmarked) relative to each other along the layer thickness, and contains multiple PET unit layers; the antibacterial surface layer 2 is arranged on the first surface, and the installation adhesive layer 3 is arranged on the second surface; the surface of the antibacterial surface layer 2 away from the substrate composite layer 1 is provided with anti-fouling protrusions 20, and the substrate composite layer 1 includes a photochromic layer 11 and / or a thermal insulation layer 12.

[0030] The anti-fouling protrusions 20 set on the surface of the antibacterial surface layer 2 form a tiny concave-convex structure texture, which can reduce the contact area of ​​dirt and thus reduce the adhesion of dirt; combined with the antibacterial surface layer 2, it can inhibit the growth of microorganisms and reduce stains caused by microorganisms, thereby indirectly improving the anti-fouling performance; and the photochromic layer 11 and / or thermal insulation layer 12 set through the substrate composite layer can give the window film energy-saving function, thereby broadening the application scenarios of the window film.

[0031] The substrate composite layer also includes an antibacterial unit layer 13 and / or an anti-ultraviolet unit layer 14. In some embodiments, the substrate composite layer 1 is a laminated structure of an antibacterial unit layer / photochromic layer / anti-ultraviolet unit layer, with the antibacterial unit layer being close to the antibacterial surface layer. This improves the antibacterial properties of the window film and also improves its antibacterial sustainability. The antibacterial agent in the antibacterial surface layer is an organic polymer antibacterial agent, while the antibacterial agent in the antibacterial unit layer is a silver-based, zinc-based, and copper-based antibacterial agent. The combination of organic and inorganic agents achieves the antibacterial sustainability of the window film. The antibacterial surface layer 2 uses an organic polymer antibacterial agent to effectively prevent the decomposition of the organic antibacterial agent, which leads to a reduction in the antibacterial effect. The antibacterial unit layer 13 is arranged on the inner surface of the antibacterial surface layer 2 to effectively prevent the precipitation or oxidation of the inorganic antibacterial agent. The photochromic material of the photochromic layer 11 is an organic compound of the spironaphtholoxazine or naphtholpyran class. Photochromic materials are able to change color or transparency when exposed to ultraviolet or visible light, and return to their original state when the light weakens or disappears. The photochromic layer 11 is typically in the functional layer of the sub-outer layer of the window film to better respond to changes in external light. This also ensures that the photochromic material is not directly affected by external wear and damage, thereby extending its service life. The provision of the anti-UV unit layer protects human skin and eyes from harm, effectively prevents indoor items from fading, further improves thermal insulation performance and reduces heat transfer, thereby extending the service life of the window film. The anti-UV unit layer 14 is obtained by adding anti-UV masterbatch to the PET raw material.

[0032] In some embodiments, the substrate composite layer 1 comprises a laminated structure of a photochromic layer, an anti-UV unit layer, and a thermal insulation layer, with the photochromic layer positioned adjacent to the antibacterial surface layer. The thermal insulation material of the thermal insulation layer 12 is ceramic nanoparticles. These ceramic nanoparticles include one or more of indium tin oxide (ITO), antimony tin oxide (ATO), and tungsten oxide (WO3). ITO is a transparent conductive oxide with excellent infrared reflectivity, contributing to its thermal insulation properties. ATO is also a transparent conductive oxide with excellent infrared reflectivity. WO3 nanoparticles reflect infrared radiation while maintaining high visible light transmittance.

[0033] In some embodiments, the substrate composite layer 1 is a stacked structure of an antibacterial unit layer / photochromic layer / heat-insulating layer 12 .

[0034] In some embodiments, a kink-resistant layer 4 is disposed between the substrate composite layer 1 and the antimicrobial surface layer 2. The kink-resistant layer 4 is a thermoplastic polyurethane layer, while the antimicrobial surface layer 2 is made of polyurethane. The kink-resistant layer 4 improves the toughness of the window film and, when combined with the antimicrobial surface layer 2, enhances its impact resistance and scratch resistance. It also protects internal functional layers (such as the thermal insulation layer and UV protection layer), extending their service life. Furthermore, the kink-resistant layer 4 is connected to the substrate composite layer 1 via a connecting adhesive layer 10.

[0035] In some embodiments, a bending-resistant layer 4 is provided between the substrate composite layer 1 and the mounting adhesive layer 3. The thermoplastic polyurethane layer 4 also provides a certain sound insulation effect, reducing external noise without directly affecting the transparency and optical properties of the window film.

[0036] In some embodiments, a bending-resistant layer 4 is provided between the substrate composite layer 1 and the antibacterial surface layer 2 , and between the substrate composite layer 1 and the mounting adhesive layer 3 .

[0037] The anti-fouling protrusions 20 are silica particles modified with fluorinated polymers, silane coupling agents, or surfactants. Fluorinated polymers, such as tridecafluorooctyltriethoxysilane, chemically bond to form a low-surface-energy fluorinated layer on the silica surface, significantly improving anti-fouling performance. Polytetrafluoroethylene and fluorinated acrylates, for example, are coated or grafted onto the silica surface to form a low-surface-energy coating. Silane coupling agents, such as methyltrimethoxysilane (MTMS), chemically react to form a low-surface-energy siloxane layer on the silica surface, improving anti-fouling performance. Vinyltrimethoxysilane (VTMS), also chemically react to form a low-surface-energy siloxane layer on the silica surface, improving anti-fouling performance. Surfactants, such as hexadecyltrimethylammonium bromide (CTAB), form a hydrophobic layer on the silica surface, improving anti-fouling performance.

[0038] The mounting adhesive layer 3 is composed of one of polyurethane, acrylate, and silicone adhesives. Polyurethane adhesive is a very versatile adhesive that provides excellent bonding strength and flexibility. It also offers good weather and chemical resistance. Acrylate adhesives cure quickly and provide excellent bonding strength, good adhesion to most plastics, and good transparency and weather resistance. Silicone adhesives offer excellent high and low temperature resistance, good electrical insulation, and good elasticity and flexibility.

[0039] An antistatic release film 5 is provided on the surface of the mounting adhesive layer 3 away from the substrate composite layer 1 .

[0040] Example 1

[0041] like Figure 1As shown, the antifouling and antimicrobial window film comprises a substrate composite layer 1, an antimicrobial surface layer 2, and an adhesive mounting layer 3. The substrate composite layer 1 has a first surface (not labeled) and a second surface (not labeled) facing each other along the thickness of the layer, and comprises multiple PET unit layers. The antimicrobial surface layer 2 is disposed on the first surface, and the adhesive mounting layer 3 is disposed on the second surface. Antifouling protrusions 20 are provided on the surface of the antimicrobial surface layer 2 facing away from the substrate composite layer 1. The substrate composite layer 1 comprises a laminated structure of an antimicrobial unit layer 13, a photochromic layer 11, and an anti-UV unit layer 14. A flex-resistant layer 4 is disposed between the substrate composite layer 1 and the adhesive mounting layer 3, connected to the substrate composite layer 1 via an adhesive connecting layer 10. An antistatic release film 5 is provided on the surface of the adhesive mounting layer 3 facing away from the substrate composite layer 1.

[0042] Example 2

[0043] like Figures 2 and 3 As shown, Example 2 is based on Example 1, except that the substrate composite layer 1 is a laminated structure of a photochromic layer 11 / anti-ultraviolet unit layer 14 / heat-insulating layer 12. A bending-resistant layer 4 is provided between the substrate composite layer 1 and the antibacterial surface layer 2.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An antifouling and antibacterial window film, characterized in that: include: A substrate composite layer having a first surface and a second surface opposite to each other along the thickness of the layer, and comprising a plurality of PET unit layers; an antibacterial surface layer, disposed on the first surface; An installation adhesive layer is provided on the second surface; The antibacterial surface layer is provided with antifouling protrusions on a surface away from the substrate composite layer, and the substrate composite layer includes a photochromic layer and / or a heat insulation layer.

2. The antifouling and antibacterial window film according to claim 1, characterized in that: The substrate composite layer also includes an antibacterial unit layer and / or an anti-ultraviolet unit layer. The substrate composite layer is a stacked structure of an antibacterial unit layer / photochromic layer / anti-ultraviolet unit layer, or a photochromic layer / anti-ultraviolet unit layer / thermal insulation layer, or an antibacterial unit layer / photochromic layer / thermal insulation layer. The antibacterial unit layer or photochromic layer is close to the antibacterial surface layer.

3. The antifouling and antibacterial window film according to claim 1, characterized in that: A bending-resistant layer is provided between the substrate composite layer and the antibacterial surface layer, and / or between the substrate composite layer and the installation adhesive layer.

4. The antifouling and antibacterial window film according to claim 3, characterized in that: The bending-resistant layer is a thermoplastic polyurethane layer, and the antibacterial surface layer is made of polyurethane.

5. The antifouling and antibacterial window film according to claim 2, characterized in that: The photochromic material of the photochromic layer is an organic compound of the spiral naphthol oxazine type or naphthol pyran type.

6. The antifouling and antibacterial window film according to claim 2, characterized in that: The heat insulation material of the heat insulation layer is ceramic nanoparticles.

7. The antifouling and antibacterial window film according to claim 2, characterized in that: The antibacterial agent of the antibacterial surface layer is an organic polymer antibacterial agent; the antibacterial agent of the antibacterial unit layer is a silver-based, zinc-based and copper-based antibacterial agent.

8. The antifouling and antibacterial window film according to claim 1, characterized in that: The anti-fouling protrusions are silicon dioxide particles modified by fluorinated polymers, silane coupling agents or surfactants.

9. The antifouling and antibacterial window film according to claim 1, characterized in that: The mounting adhesive layer is one of a polyurethane adhesive layer, an acrylate adhesive layer and an organic silicone adhesive layer.

10. The antifouling and antibacterial window film according to claim 1, characterized in that: An antistatic release film is provided on the surface of the installation adhesive layer away from the substrate composite layer.

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