PET (Polyethylene Terephthalate)-based composite coating automobile solar film laminated structure

Abstract

The utility model relates to the technical field of automobile film manufacturing, and discloses a PET (Polyethylene Terephthalate)-based composite coating automobile solar film laminated structure which comprises an outer laminated film layer, an inner adhesive film layer is adhered and fixed on the bottom surface of the outer laminated film layer, the outer laminated film layer comprises a PET base layer, a main grid layer is embedded in the PET base layer, and the inner adhesive film layer is adhered and fixed on the inner adhesive film layer. The upper side and the lower side of the main grid layer are connected with connecting wires, a UV absorption layer is attached to the bottom face of the PET base layer, a second grid layer is embedded into the UV absorption layer, and a groove layer is formed in the top face of the PET base layer. The PET base layer, the UV absorption layer and the nano ceramic coating are mutually overlapped and fixed, the main grid layer, the second grid layer and the third grid layer are distributed and embedded among the PET base layer, the UV absorption layer and the nano ceramic coating, and the three groups of grids are connected and fixed through the connecting wires, so that the structure between the overlapped film layers is reinforced, and the film layers are not easy to deform. And the structure use stability is kept.

Description

Technical Field

[0001] This utility model relates to the field of automotive window film manufacturing technology, specifically to a PET-based composite coating automotive solar film laminated structure. Background Technology

[0002] Automotive window film, also known as explosion-proof film or heat insulation film, is a multi-layer composite film that is adhered to the surface of automotive glass, including the front and rear windshields, side windows, and sunroof. Its core function is to achieve heat insulation, UV protection, explosion protection, and one-way visibility through special materials and technologies, while also taking into account safety and aesthetics. PET-based composite coated automotive window film uses biaxially oriented polyester film (PET) as the core substrate and adds functional coatings such as metal plating, UV absorbers, and adhesives through a multi-layer composite process. Its core functions include heat insulation, UV protection, explosion protection, and privacy protection.

[0003] Existing composite-coated automotive window films primarily consist of a PET base layer and a surface metallic coating and anti-abrasion layer. These layers are layered and combined through adhesive bonding or vapor deposition. During application, a water mist is evenly sprayed onto both the glass and the film; this mist acts as a lubricant, allowing the film to adhere smoothly to the glass. The film is then gently applied in sequence, ensuring accurate positioning. A squeegee is used to remove air bubbles and wrinkles, ensuring a tight seal with the glass. This window film provides protection against direct sunlight and other harmful rays to the car windows.

[0004] While the aforementioned existing technologies have significant beneficial effects, they still have shortcomings:

[0005] Although the aforementioned composite coating automotive solar film forms a composite structure through coating, it has better heat insulation and UV protection capabilities compared to traditional dyed films or single-layer metal films. However, the overall film structure relies solely on the bonding structure between the molds or the vapor deposition layering, and the structural stability between the mold layers is insufficient. In long-term use, phenomena such as the detachment of composite layers can easily occur, affecting the normal functionality of the solar film. Therefore, a PET-based composite coating automotive solar film layered structure is proposed. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides a PET-based composite coating automotive solar film laminated structure. The structure consists of a PET base layer, a UV absorption layer, and a mesh layer embedded within the nano-ceramic coating. Connecting wires secure the three mesh layers together, reinforcing the structure of the laminated film layers and ensuring structural stability.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a PET-based composite coating automotive solar film laminated structure, comprising an outer laminated film layer, an inner adhesive film layer bonded to the bottom surface of the outer laminated film layer, the outer laminated film layer comprising a PET base layer, a main mesh layer embedded inside the PET base layer, connecting wires connecting the upper and lower sides of the main mesh layer, a UV absorbing layer bonded to the bottom surface of the PET base layer, a second mesh layer embedded inside the UV absorbing layer, a groove layer formed on the top surface of the PET base layer, a nano-ceramic coating bonded to the top surface of the groove layer, a third mesh layer embedded inside the nano-ceramic coating, a nano-metal composite layer bonded to the top surface of the nano-ceramic coating, and an anti-wear layer bonded to the top surface of the nano-metal composite layer.

[0008] Preferably, the third and second mesh layers are connected and fixed to the upper and lower sides of the main mesh layer by connecting wires, and the main mesh layer is uniformly embedded in a mesh shape along the interior of the PET base layer.

[0009] Preferably, the PET base layer is fixedly connected to the UV absorption layer and the groove layer, and the top surface of the groove layer is uneven.

[0010] Preferably, the nano-ceramic coating is uniformly sprayed along the top surface of the groove layer, and the top surface of the nano-ceramic coating is fixedly bonded to the nano-metal composite layer.

[0011] Preferably, the nano-metal composite layer is a mixture of metal particles and nano-alumina, and the nano-metal composite layer is uniformly distributed along the top surface of the nano-ceramic coating.

[0012] Preferably, the inner adhesive film layer includes a hot melt adhesive layer, the bottom surface of the hot melt adhesive layer is bonded to an inner base layer, the bottom surface of the inner base layer is bonded to an acrylic adhesive layer, and the bottom surface of the acrylic adhesive layer is bonded to a release film layer.

[0013] Preferably, the inner base layer is heat-sealed to the UV absorption layer by a hot melt adhesive layer, and the acrylic adhesive layer is evenly distributed along the bottom surface of the inner base layer.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This utility model uses a PET base layer, a UV absorption layer, and a nano-ceramic coating to be superimposed and fixed together. A main grid layer, a second grid layer, and a third grid layer are distributed and embedded between the PET base layer, the UV absorption layer, and the nano-ceramic coating. The three grids are connected and fixed together by connecting wires, forming a reinforced structure between the superimposed film layers, thus maintaining the stability of the structure in use.

[0016] 2. This composite coating automotive solar film uses a combination of nano-ceramic coating and nano-metal composite layer. It is sprayed onto the surface of PET base layer using magnetron sputtering technology to form a composite layer, providing effective reflectivity and heat insulation. The grooved layer on the surface of PET base layer provides stable adhesion of the mixed coating with an uneven structure, reducing the risk of detachment. The outer anti-wear layer uses epoxy polyurethane material to provide friction scratches on the outside of the film.

[0017] 3. The inner adhesive layer of this composite coating automotive solar film is fixed to the bottom surface of the outer laminated film layer by heat sealing technology through a hot melt adhesive layer to maintain structural stability, while the inner base layer is combined with an acrylic adhesive layer to stably bond to the surface of the car glass, providing adsorption and adhesion in the event of glass breakage, and maintaining protective stability.

[0018] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures pointed out in the description, claims, and drawings. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the main body of this utility model;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the outer layer of the present invention.

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of the main grid layer in the outer layer of this utility model;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the inner adhesive film layer of this utility model.

[0023] In the diagram: 1. Outer laminate layer; 101. PET base layer; 102. Main mesh layer; 103. Connecting wire; 104. UV absorption layer; 105. Second mesh layer; 106. Groove layer; 107. Nano-ceramic coating; 108. Third mesh layer; 109. Nano-metal composite layer; 110. Anti-wear layer; 2. Inner adhesive film layer; 201. Hot melt adhesive layer; 202. Inner base layer; 203. Acrylic adhesive layer; 204. Release film layer. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-4 This embodiment of a PET-based composite coating automotive solar film laminate structure includes an outer laminate 1, an inner adhesive film layer 2 bonded to the bottom surface of the outer laminate 1, the outer laminate 1 including a PET base layer 101, a main mesh layer 102 embedded inside the PET base layer 101, connecting wires 103 connected to the upper and lower sides of the main mesh layer 102, a UV absorption layer 104 bonded to the bottom surface of the PET base layer 101, a second mesh layer 105 embedded inside the UV absorption layer 104, a groove layer 106 formed on the top surface of the PET base layer 101, a nano-ceramic coating 107 bonded to the top surface of the groove layer 106, a third mesh layer 108 embedded inside the nano-ceramic coating 107, a nano-metal composite layer 109 bonded to the top surface of the nano-metal composite layer 107, and an anti-wear layer 110 bonded to the top surface of the nano-metal composite layer 109.

[0026] like Figure 1-4 As shown, the composite coating automotive solar film of this invention is similar to existing automotive solar films. The main improvement of this invention lies in the mesh layer structure embedded within the PET base layer 101, UV absorption layer 104, and nano-ceramic coating 107. Connecting wires 103 connect and fix the three mesh layers, forming a reinforced structure between the superimposed film layers, thus maintaining structural stability. The magnetron sputtering technology and hot melt adhesive layer 201 in this invention are existing technologies. The PET base layer 101, UV absorption layer 104, and nano-ceramic coating 107 are superimposed and fixed together, and the layers between the PET base layer 101, UV absorption layer 104, and nano-ceramic coating 107 are... The membrane is embedded with a main grid layer 102, a second grid layer 105, and a third grid layer 108. The three grids are connected and fixed by connecting wires 103 to form a reinforced structure between the superimposed membrane layers, ensuring structural stability. A nano-ceramic coating 107 is mixed with a nano-metal composite layer 109 and sprayed onto the surface of the PET base layer 101 using magnetron sputtering technology to form a composite layer, providing effective reflectivity and heat insulation. The grooved layer 106 on the surface of the PET base layer 101 provides stable adhesion of the mixed coating with an uneven structure, reducing the risk of detachment. The outer anti-wear layer 110 is made of epoxy polyurethane material to prevent friction and scratches on the membrane surface.

[0027] like Figure 4As shown, the inner adhesive film layer 2 includes a hot melt adhesive layer 201, an inner base layer 202 is attached to the bottom surface of the hot melt adhesive layer 201, an acrylic adhesive layer 203 is attached to the bottom surface of the inner base layer 202, and a release film layer 204 is attached to the bottom surface of the acrylic adhesive layer 203. The inner adhesive film layer 2 is fixed to the bottom surface of the outer laminated film layer 1 by heat sealing technology through the hot melt adhesive layer 201 to maintain structural stability. The inner base layer 202, together with the acrylic adhesive layer 203, can be stably bonded to the surface of the vehicle glass, providing adsorption and adhesion in the case of glass breakage, maintaining protective stability. At the same time, the release film layer 204 can be evenly applied along the vehicle glass simply by peeling it off.

[0028] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A PET-based composite-coated automotive solar film laminate structure comprising an outer film layer (1), characterized in that, The bottom surface of the outer layer (1) is bonded with an inner adhesive film layer (2). The outer layer (1) includes a PET base layer (101). A main mesh layer (102) is embedded inside the PET base layer (101). Connecting wires (103) are connected to the upper and lower sides of the main mesh layer (102). A UV absorption layer (104) is attached to the bottom surface of the PET base layer (101). A second mesh layer (105) is embedded inside the UV absorption layer (104). A groove layer (106) is formed on the top surface of the PET base layer (101). A nano-ceramic coating (107) is attached to the top surface of the groove layer (106). A third mesh layer (108) is embedded inside the nano-ceramic coating (107). A nano-metal composite layer (109) is attached to the top surface of the nano-metal composite layer (109). An anti-wear layer (110) is attached to the top surface of the nano-metal composite layer (109).

2. The PET-based composite coated automotive solar film laminated structure according to claim 1, wherein, The third mesh layer (108) and the second mesh layer (105) are connected and fixed to the upper and lower sides of the main mesh layer (102) by connecting wires (103), and the main mesh layer (102) is uniformly embedded in a mesh shape along the interior of the PET base layer (101).

3. The PET-based composite coated automotive solar film laminated structure of claim 1, wherein, The PET base layer (101) is fixedly connected to the UV absorption layer (104) and the groove layer (106), and the top surface of the groove layer (106) is uneven.

4. The PET-based composite coating automotive solar film laminated structure according to claim 1, characterized in that, The nano-ceramic coating (107) is uniformly sprayed along the top surface of the groove layer (106), and the top surface of the nano-ceramic coating (107) is fixedly bonded to the nano-metal composite layer (109).

5. The PET-based composite coated automotive solar film stack of claim 1, wherein, The nano-metal composite layer (109) is a mixture of metal particles and nano-alumina, and the nano-metal composite layer (109) is uniformly distributed along the top surface of the nano-ceramic coating (107).

6. The PET-based composite coated automotive solar film laminated structure of claim 1, wherein, The inner adhesive film layer (2) includes a hot melt adhesive layer (201), the bottom surface of which is attached to an inner base layer (202), the bottom surface of which is attached to an acrylic adhesive layer (203), and the bottom surface of which is attached to a release film layer (204).

7. The PET-based composite coated automotive solar film stack of claim 6, wherein, The inner base layer (202) is fixed to the UV absorption layer (104) by heat bonding through a hot melt adhesive layer (201), and the acrylic adhesive layer (203) is evenly distributed along the bottom surface of the inner base layer (202).

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