TPU composite film

Abstract

The invention provides a TPU (thermoplastic polyurethane) composite film which comprises a functional layer, a TPU layer and a bonding layer which are sequentially stacked, the functional layer comprises at least one of silicon resin and fluorosilicone polymer, and the manufacturing method of the TPU composite film comprises the following steps: coating an adhesive on a release layer to form the bonding layer on the release layer; a TPU layer is arranged on the side, away from the release layer, of the bonding layer; a functional layer is arranged on one side, far away from the bonding layer, of the TPU layer. According to the TPU composite film, the functional layer serving as the outermost layer can improve the antifouling, hydrophobic, scratch-resistant, ultraviolet-resistant, weather-resistant and other properties of the TPU composite film, the TPU layer serving as the inner layer can improve the tension, tensile force, toughness and aging-resistant properties of the TPU composite film, the TPU composite film is not prone to oxidation and yellowing, and the TPU layer serving as the base layer can be conveniently coated on the TPU composite film to form the functional layer.

Description

Technical Field

[0001] The invention relates to the technical field of film materials, in particular to a TPU composite film. Background Art

[0002] Silicone rubber membrane is an innovative environmentally friendly material that combines the excellent performance of silicone with the texture of leather, bringing a brand new choice to modern industry and consumers. With its unique chemical structure and physical properties, this material provides an environmentally friendly and durable alternative, especially today when traditional animal leather and synthetic leather face environmental and ethical challenges. The application range of silicone rubber membrane is very wide, from automotive interiors, furniture decoration, electronic product exteriors, and outdoor equipment. With the advancement of technology and the increasing demand of consumers for environmentally friendly materials, silicone rubber membrane is gradually becoming a popular choice in the market.

[0003] The existing silicone rubber films used for automobile interiors and furniture products have relatively poor toughness and wear resistance and are not conducive to maintenance. In addition, the anti-fouling, hydrophobic, scratch-resistant, UV-resistant and weather-resistant properties of the existing silicone rubber films used for automobile interiors or furniture products still need to be improved. Summary of the invention

[0004] The present invention aims to solve the above problems and provide a TPU composite film which has good toughness and aging resistance and is antifouling, hydrophobic, scratch-resistant, UV-resistant and weather-resistant.

[0005] To achieve the above-mentioned purpose, the present invention provides a TPU composite film, comprising a functional layer, a TPU layer and an adhesive layer stacked in sequence, wherein the functional layer comprises at least one of a silicone resin and a fluorosilicone polymer, and a method for manufacturing the TPU composite film comprises: applying an adhesive on the release layer to form the adhesive layer on the release layer; arranging a TPU layer on a side of the adhesive layer away from the release layer; and arranging a functional layer on a side of the TPU layer away from the adhesive layer.

[0006] In the present invention, the functional layer made of at least one of silicone resin and fluorosilicone polymer as the outermost layer can improve the anti-fouling, hydrophobic, scratch-resistant, UV-resistant and weather-resistant properties of the TPU composite film. The TPU layer as the inner layer can improve the tension, pulling force, toughness and aging resistance of the TPU composite film, and is not easy to oxidize and turn yellow. The adhesive layer can facilitate the TPU composite film to be attached to the target object. In addition, the functional layers of the present invention are all made of silicone. Compared with ordinary silicone, silicone has the advantages of anti-fouling, high and low temperature resistance, weather resistance, hydrophobicity, and antibacterial. When the functional layer is made of silicone, the TPU composite film can have good anti-fouling, high and low temperature resistance, weather resistance, hydrophobicity, and antibacterial properties.

[0007] In the TPU composite film involved in the present invention, optionally, the silicone resin includes at least one of MQ silicone resin and VMQ silicone resin. The silicone resin may also include at least one of MQ silicone resin, VMQ silicone resin or fluorosilicone resin. In this case, MQ silicone resin has excellent heat resistance and low temperature resistance, good weather resistance, very good water repellency, good adhesion performance, and excellent isolation performance. Making MQ resin as the outermost layer can improve the heat resistance, low temperature resistance, weather resistance, water repellency, isolation and other properties of the TPU composite film; VMQ silicone resin (vinyl MQ silicone resin) has excellent heat resistance, low temperature resistance, film forming property (able to form a uniform film layer), water repellency, aging resistance and UV resistance, high transparency and low volatility, isolation, etc. Making VMQ silicone resin as the outermost layer can improve the heat resistance, low temperature resistance, weather resistance, water repellency, isolation and other properties of the TPU composite film. Temperature resistance, film-forming property (able to form a uniform film layer), water repellency, aging resistance and UV resistance, high transparency and low volatility, and isolation; fluorosilicone resin has excellent high temperature resistance, corrosion resistance, insulation, water repellency and non-adhesion, weather resistance, stain resistance, insulation, high hardness, radiation protection and high transparency, etc. Making fluorosilicone resin as the outermost layer can improve the high temperature resistance, corrosion resistance, insulation, water repellency and non-adhesion, weather resistance, stain resistance, insulation, high hardness, radiation protection and high transparency of the TPU composite film, and a mixture of two or three of them can combine the above performance advantages.

[0008] In the TPU composite film involved in the present invention, optionally, a self-repairing coating is further included, and the self-repairing coating is arranged on the side of the functional layer away from the TPU layer. In this case, by arranging the self-repairing coating on the surface of the functional layer, a self-repairing function of indentation etc. can be achieved, and the flatness of the surface of the TPU composite film can be maintained.

[0009] In the TPU composite film of the present invention, the functional layer may be one or more layers. In this case, the film thickness can be controlled by increasing or decreasing the number of functional layers according to the user's requirements for the film thickness.

[0010] The TPU composite film of the present invention may optionally further include a hand-feeling layer, which is disposed on a side of the functional layer away from the TPU layer. Thus, by using the hand-feeling layer as the outermost layer, the touch feel of the TPU composite film can be improved.

[0011] In the TPU composite film of the present invention, optionally, an adhesive treatment agent is coated between the TPU layer and the functional layer. In this case, the adhesive treatment agent can enhance the bonding force between the functional layer and the TPU layer, and can reduce the possibility of the TPU layer or the functional layer falling off.

[0012] In the TPU composite film involved in the present invention, optionally, the functional layer can be a silicone rubber layer, a silicone resin layer or a mixed layer made of silicone rubber and silicone resin. The silicone rubber layer, silicone resin layer or mixed layer can be made by coating liquid silicone rubber, liquid silicone resin, or a mixture of liquid silicone rubber and liquid silicone resin on the adhesive layer.

[0013] In the TPU composite film involved in the present invention, optionally, a hydrophobic agent, a scratch resistant agent, an ultraviolet resistant agent and a weather resistant agent are added to the functional layer. In this case, the hydrophobic agent can improve the hydrophobicity of the TPU composite film, the scratch resistant agent can improve the scratch resistance of the TPU composite film, the ultraviolet resistant agent can improve the ultraviolet resistance of the TPU composite film, and the weather resistant agent can improve the weather resistance of the TPU composite film.

[0014] In the TPU composite film of the present invention, optionally, the TPU layer includes one or more layers of TPU films. Thus, by providing different numbers of TPU layers, the TPU composite film can have a certain thickness and texture.

[0015] In the TPU composite film of the present invention, a colored organic silicon layer is optionally provided between the functional layer and the TPU layer. In this case, the functional layer is preferably made into a transparent layer, and by providing the colored organic silicon layer between the functional layer and the TPU layer, the appearance of the TPU composite film can have different colors, which can improve the ornamental value of the TPU composite film.

[0016] In the TPU composite film of the present invention, the colored organic silicon layer is optionally prepared by adding a dye, a dispersant and an additive to liquid silicon. In this case, by adding a dye to the liquid silicone rubber, the prepared colored organic silicon layer can have different colors, which can improve the aesthetics of the TPU composite film, and the addition of the dispersant and the additive can ensure that the dye is evenly distributed in the liquid silicone rubber.

[0017] In the TPU composite film involved in the present invention, optionally, the TPU layer is a HERZI TPU color-changing film. In this case, since the HERZI TPU color-changing film can have richer colors than ordinary TPU composite films, for example, the HERZI TPU color-changing film can easily achieve cool metallic colors, deep matte colors, and fashionable gradient colors, especially when the TPU composite film is used for automotive interiors, it can greatly enhance the user's perception and use experience.

[0018] In the TPU composite film involved in the present invention, optionally, the release layer is further included, and the release layer is arranged on the side of the adhesive layer away from the TPU layer. In this case, the release layer can be used as a manufacturing base to facilitate the formation of the adhesive layer, the TPU layer and the functional layer on the release layer. In addition, the release layer can also be used as a protective film. When the TPU composite film is used, the release layer can be torn off and then used.

[0019] In the TPU composite film involved in the present invention, optionally, a protective layer is further included, and the protective layer is arranged on a side of the functional layer away from the TPU layer. In this case, the protective layer can be torn off when the TPU composite film is used, and the protective layer as the outermost layer can play a role in protection and reducing wear.

[0020] In the TPU composite film of the present invention, the color of the functional layer can optionally match the color of the TPU layer, thereby making the overall appearance of the TPU composite film better.

[0021] According to the present invention, a TPU composite film can be provided which has strong tension, pulling force, toughness and aging resistance, is not easy to be oxidized and yellowed, is environmentally friendly, and is anti-fouling, hydrophobic, scratch-resistant, UV-resistant and weather-resistant. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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 description of the prior art will be briefly introduced below. Obviously, the drawings in the description are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a schematic diagram of the structure in which the TPU composite film of the present invention is attached to a target object.

[0024] Figure 2 It is a schematic diagram of the overall structure of the TPU composite film of the present invention. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the 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 making creative work are within the scope of protection of the present invention.

[0026] The present invention provides a TPU composite film. Compared with the existing TPU composite film, the TPU composite film has the advantages of good toughness and wear resistance, anti-fouling, hydrophobic, scratch-resistant, UV-resistant and weather-resistant. The TPU composite film can be attached to a target object for use.

[0027] The TPU composite film of the present invention can be applied to automobile interior decoration, furniture sofa surface, wall stickers, etc. Preferably, the TPU composite film of the present invention can be used as automobile cover.

[0028] Reference Figure 1 To achieve the above object, the present invention provides a TPU composite film 1. The TPU composite film 1 may include a functional layer 30, a TPU layer (Thermoplastic Polyurethane) 20 and an adhesive layer 10 stacked in sequence.

[0029] In some embodiments, the functional layer 30 may include at least one of silicone resin and fluorosilicone polymer.

[0030] In some embodiments, the functional layer 30 may further include silicone rubber.

[0031] In some embodiments, the functional layer 30 may be a silicone rubber layer. In some embodiments, the silicone rubber layer may be one or more layers. In some embodiments, the multi-layer silicone rubber layer may be made by coating multiple layers of liquid silicone rubber on the TPU layer 20 at one time. In some embodiments, the color of the silicone rubber layer may be transparent or colored. For example, a colorant may be added to the liquid silicone rubber to form a colored silicone. In some embodiments, the multi-layer silicone rubber layer may include both a transparent silicone rubber layer and a colored organic silicone layer. The silicone rubber layer has excellent anti-fouling, hydrophobic, scratch-resistant, UV-resistant and weather-resistant properties. Using the silicone rubber layer as the outermost layer can enable the prepared TPU composite film 1 to have excellent anti-fouling, hydrophobic, scratch-resistant, UV-resistant and weather-resistant properties.

[0032] In some embodiments, the functional layer 30 may be a silicone layer. In some embodiments, the silicone layer may be one or more layers. In some embodiments, the multi-layer silicone layer may be made by coating multiple layers of liquid silicone on the TPU layer 20 at one time. In some embodiments, the color of the silicone layer may be transparent or colored. For example, a colorant may be added to the liquid silicone to form a colored silica gel. In some embodiments, the multi-layer silicone layer may include a transparent silicone layer or a colored organic silicone layer. The silicone layer has excellent low surface tension, thermal stability, weather resistance, high and low temperature resistance, electrical insulation, chemical corrosion resistance, flexibility, waterproof, moisture-proof, non-volatile, non-combustible and other properties. Using the silicone layer as the outermost layer can make the prepared TPU composite film 1 have excellent low surface tension, thermal stability, weather resistance, high and low temperature resistance, electrical insulation, chemical corrosion resistance, flexibility, waterproof, moisture-proof, non-volatile, non-combustible and other properties.

[0033] In some embodiments, the functional layer 30 may be a hybrid layer made of silicone resin and fluorosilicone polymer.

[0034] In some embodiments, the functional layer 30 may be a mixed layer made of silicone rubber and silicone resin, thereby combining the performance advantages of silicone rubber and silicone resin.

[0035] In some embodiments, the fluorosilicone polymer may be fluorosilicone rubber or fluorosilicone resin, etc.

[0036] In the present invention, the functional layer made of at least one of silicone resin and fluorosilicone polymer as the outermost layer can improve the anti-fouling, hydrophobic, scratch-resistant, UV-resistant and weather-resistant properties of the TPU composite film. The TPU layer as the inner layer can improve the tension, pulling force, toughness and aging resistance of the TPU composite film, and is not easy to oxidize and turn yellow. The adhesive layer can facilitate the TPU composite film to be attached to the target object. In addition, the functional layers of the present invention are all made of silicone. Compared with ordinary silicone, silicone has the advantages of anti-fouling, high and low temperature resistance, weather resistance, hydrophobicity, and antibacterial. When the functional layer is made of silicone, the TPU composite film can have good anti-fouling, high and low temperature resistance, weather resistance, hydrophobicity, and antibacterial properties.

[0037] In some embodiments, the silicone rubber may be at least one of dimethyl silicone rubber, methyl vinyl silicone rubber, phenyl silicone rubber, or fluorosilicone rubber.

[0038] In some embodiments, the silicone resin layer includes at least one of MQ silicone resin, VMQ silicone resin or fluorosilicone resin. In this case, MQ silicone resin has excellent heat resistance and low temperature resistance, good weather resistance, very good water repellency, good adhesion performance, and excellent isolation performance. Making MQ resin as the outermost layer can improve the heat resistance, low temperature resistance, weather resistance, water repellency, isolation and other properties of the TPU composite film; VMQ silicone resin (vinyl MQ silicone resin) has excellent heat resistance, low temperature resistance, film forming property (able to form a uniform film layer), water repellency, aging resistance and UV resistance, high transparency and low volatility, isolation, etc. Making VMQ silicone resin as the outermost layer can improve the heat resistance, low temperature resistance, weather resistance, water repellency, isolation and other properties of the TPU composite film. Temperature resistance, film-forming property (able to form a uniform film layer), water repellency, aging resistance and UV resistance, high transparency and low volatility, and isolation; fluorosilicone resin has excellent high temperature resistance, corrosion resistance, insulation, water repellency and non-adhesion, weather resistance, stain resistance, insulation, high hardness, radiation protection and high transparency, etc. Making fluorosilicone resin as the outermost layer can improve the high temperature resistance, corrosion resistance, insulation, water repellency and non-adhesion, weather resistance, stain resistance, insulation, high hardness, radiation protection and high transparency of the TPU composite film, and a mixture of two or three of them can combine the above performance advantages.

[0039] In some embodiments, the functional layer 30 may be a VMQ resin layer. In some embodiments, the VMQ resin layer may be one or more layers. In some embodiments, the multi-layer VMQ resin layer may be made by coating multiple layers of VMQ resin on the TPU layer 20 at one time. In some embodiments, the color of the VMQ resin layer may be transparent or colored. For example, a colorant may be added to the VMQ resin to form a colored VMQ resin. In some embodiments, the multi-layer VMQ resin layer may include both a transparent VMQ resin layer and a colored VMQ resin layer. The VMQ resin layer has excellent hydrophobicity, transparency and touch feel. Using the VMQ resin layer as the outermost layer can make the prepared TPU composite film 1 have excellent hydrophobicity, transparency and touch feel.

[0040] In some embodiments, the functional layer 30 may be a mixed layer made of silicone rubber and VMQ resin. The mixed layer may be made by adding VMQ resin to liquid silicone rubber. The color of the mixed layer may be transparent or colored. For example, a colorant may be added to the mixture of liquid silicone rubber and VMQ resin to form a colored mixed layer. In this case, the mixed layer can fully integrate the excellent properties of silicone and VMQ resin. By using the mixed layer as the outermost layer, the TPU composite film 1 can integrate the excellent properties of silicone and VMQ resin.

[0041] In some embodiments, the functional layer 30 may include multiple types of a silicone rubber layer, a silicone resin layer, and a mixed layer. In other words, the functional layer 30 may be composed of any combination of the silicone rubber layer, the silicone resin layer, and the mixed layer. The silicone rubber layer may be one or more layers, the silicone resin layer may be one or more layers, and the mixed layer may be one or more layers. Multiple silicone rubber layers, multiple silicone resin layers, and multiple mixed layers may be arranged and combined in any manner.

[0042] For example, the functional layer 30 may include a silicone rubber layer and a silicone resin layer. The silicone rubber layer may be disposed on a side of the TPU layer 20 away from the adhesive layer 10. The silicone resin layer may be disposed on a side of the silicone rubber layer away from the TPU layer 20. Of course, the positions of the silicone rubber layer and the silicone resin layer may also be interchanged.

[0043] For example, the functional layer 30 may include a silicone rubber layer and a hybrid layer. The silicone rubber layer may be disposed on a side of the TPU layer 20 away from the adhesive layer 10. The hybrid layer may be disposed on a side of the silicone rubber layer away from the TPU layer 20. Of course, the positions of the silicone rubber layer and the hybrid layer may also be interchanged.

[0044] I won’t give all the examples here.

[0045] In some embodiments, the TPU composite film 1 may further include a self-repairing coating, which may be disposed on a side of the functional layer 30 away from the TPU layer 20. In this case, by disposing the self-repairing coating on the surface of the functional layer 30, a self-repairing function for indentations and the like can be achieved, and the flatness of the surface of the TPU composite film can be maintained.

[0046] In some embodiments, the self-repairing coating may be a hydrogel film, which may be attached to the surface of the functional layer 30 by adsorption.

[0047] In some embodiments, at least one of a mildewproofing agent and an antibacterial agent may be added to the functional layer 30. Thus, the prepared TPU composite film 1 can have mildewproofing and antibacterial functions, can reduce the growth of bacteria on the surface of the TPU composite film 1, and increase the service life of the film.

[0048] In some embodiments, the mildew preventer can be an organosilicon quaternary ammonium salt antibacterial agent, dibutyltin dilaurate, organosilicon copper quaternary ammonium salt, and the like.

[0049] In some embodiments, the antibacterial agent may be an organosilicon quaternary ammonium salt antibacterial agent, for example, dimethyloctadecyl[3-trimethoxysilylpropyl]ammonium chloride, dimethyloctadecyl[3-methyldimethoxysilylpropyl]ammonium chloride, dimethyloctadecyl[3-triethoxysilylpropyl]ammonium chloride, and the like.

[0050] Reference Figure 2In some embodiments, the TPU composite film 1 may further include a release layer 40. The release layer 40 may be used as a manufacturing substrate, and the release layer 40 may be torn off when the TPU composite film 1 is used. For example, when the TPU composite film 1 is used as a car cover, the side with the adhesive layer 10 may be attached to the car after the release layer 40 is torn off.

[0051] The preparation method of the TPU composite film of the present invention can be as follows: coating an adhesive on the release layer 40 to form an adhesive layer 10 on the release layer; arranging a TPU layer 20 on the side of the adhesive layer 10 away from the release layer 40; and arranging a functional layer 30 on the side of the TPU layer 20 away from the adhesive layer 10.

[0052] In some embodiments, the adhesive may be dried by a drying device to form an adhesive layer 10 .

[0053] In the present invention, the functional layer 30 as the outermost layer can improve the antifouling, hydrophobic, scratch-resistant, UV-resistant and weather-resistant properties of the TPU composite film 1, and the TPU layer 20 as the inner layer can improve the tension, pulling force, toughness and aging resistance of the TPU composite film 1, and is not easy to oxidize and turn yellow. The TPU layer 20 as the base layer can be conveniently coated thereon to form a functional layer. In addition, the TPU composite film 1 of the present invention is made of environmentally friendly materials with good environmental performance.

[0054] In some embodiments, the thickness of the TPU layer 20 may be 10 micrometers to 300 micrometers. Preferably, the thickness of the TPU layer 20 may be 50 micrometers or 100 micrometers.

[0055] In some embodiments, the total thickness of the functional layer may be 50 micrometers to 1000 micrometers.

[0056] In some embodiments, the release layer 40 may have a thickness of 10 micrometers to 100 micrometers. Preferably, the release layer 40 may have a thickness of 50 micrometers.

[0057] In the TPU composite film involved in the present invention, the functional layer 30 may be one or more layers. For example, the functional layer 30 may be 1 to 10 layers. In this case, the film thickness can be controlled by increasing or decreasing the number of functional layers according to the user's requirements for the film thickness.

[0058] In some embodiments, when the functional layer 30 is multi-layered, the thickness of each functional layer may be 50 micrometers to 300 micrometers.

[0059] In some embodiments, the adhesive layer 10 may be an OCA adhesive coating, an acrylic adhesive coating, or a silicone adhesive coating.

[0060] In some embodiments, the silicone rubber layer or the mixed layer is made by coating liquid silicone rubber, liquid silicone resin, or a mixture of liquid silicone rubber and liquid silicone resin on the adhesive layer. In some embodiments, a hydrophobic agent, a scratch resistant agent, an ultraviolet resistant agent, and a weather resistant agent are added to the liquid silicone rubber, liquid silicone resin, or a mixture of liquid silicone rubber and liquid silicone resin. In this case, the hydrophobic agent can improve the hydrophobicity of the TPU composite film, the scratch resistant agent can improve the scratch resistance of the TPU composite film, the ultraviolet resistant agent can improve the ultraviolet resistance of the TPU composite film, and the weather resistant agent can improve the weather resistance of the TPU composite film.

[0061] Liquid silicone rubber, liquid silicone resin, or a mixture of liquid silicone rubber and liquid silicone resin may be dried by a drying device to form the functional layer 30 .

[0062] In some embodiments, the multi-layer functional layer may preferably be three layers, for example, the multi-layer functional layer may include a first functional layer, a second functional layer and a third functional layer stacked in sequence. A first liquid silicone (silicone rubber or silicone resin) may be coated on the adhesive layer 10 to form a first functional layer on the adhesive layer 10; a second liquid silicone may be coated on a side of the first functional layer away from the adhesive layer 10 to form a second functional layer on the first functional layer; a third liquid silicone may be coated on a side of the second functional layer away from the first functional layer to form a third functional layer on the second functional layer. The compositions of the first liquid silicone, the second liquid silicone and the third liquid silicone may be the same or different.

[0063] In some embodiments, the TPU layer 20 may include one or more layers of TPU film. Thus, by providing different numbers of TPU layers, the TPU composite film can have a certain thickness and texture.

[0064] In some embodiments, the TPU composite film 1 may further include a hand-feeling layer, which may be disposed on a side of the functional layer away from the TPU layer. Thus, by using the hand-feeling layer as the outermost layer, the touch feel of the TPU composite film can be improved.

[0065] In some embodiments, an adhesive treatment agent may be coated between the TPU layer 20 and the functional layer 30 , thereby enhancing the adhesion between the functional layer 30 and the TPU layer 20 and improving the bonding force between the functional layer 30 and the TPU layer 20 .

[0066] In some embodiments, the adhesive treatment agent can be glue, instant glue, UV glue, OCA glue, TPU treatment agent CL-25T, etc.

[0067] In some embodiments, the functional layer 30 and the TPU layer 20 may be transparent, thereby enhancing the light reflectivity of the TPU composite film 1 , and when the TPU composite film 1 is applied to automobile interiors, the brightness inside the automobile can be improved.

[0068] In some embodiments, the color of the functional layer 30 may be transparent, and the color of the TPU layer 20 may be non-transparent, so that the color of the TPU layer 20 can be fully displayed through the functional layer 30 .

[0069] In some embodiments, the hydrophobic agent may be an organic silicone resin, such as polydimethylsiloxane (PPMS), etc.; the hydrophobic agent may also be a fluorinated silane, such as trifluoropropyltrichlorosilane.

[0070] In some embodiments, the anti-scratch agent may be silica nanoparticles or a polyurethane (PU) modifier.

[0071] In some embodiments, the UV resistant agent may be an ultraviolet light absorber (UVA), such as a benzotriazole compound; the UV resistant agent may also be a light stabilizer (HALS), such as a hindered amine light stabilizer.

[0072] In some embodiments, the weathering agent may be an antioxidant, such as a hindered phenol antioxidant; the weathering agent may be a light stabilizer, such as HALS or other benzotriazoles.

[0073] In some embodiments, at least one silicone rubber layer may be provided between the functional layer 30 and the TPU layer 20. The at least one silicone rubber layer may play a role of connection and wear resistance. In some embodiments, the color of the at least one silicone rubber layer may be transparent, colored, etc. In some embodiments, the multi-layer silicone rubber layer may include both a colored organic silicone layer and a transparent silicone rubber layer.

[0074] In some embodiments, a colored organic silicon layer may be provided between the functional layer 30 and the TPU layer 20. In this case, by providing a colored organic silicon layer between the functional layer 30 and the TPU layer 20, the appearance of the TPU composite film 1 can have different colors, which can improve the aesthetics of the TPU composite film 1.

[0075] In some embodiments, the colored silicone in the colored silicone layer may be silicone rubber, silicone resin, or a mixture of the two.

[0076] In some embodiments, the colored organic silicone layer can be made by adding a dye, a dispersant and an additive to liquid silicone. In this case, by adding a dye to the liquid silicone rubber, the prepared colored organic silicone layer can have different colors, which can improve the aesthetics of the TPU composite film 1. Adding a dispersant and an additive can ensure that the dye is evenly distributed in the liquid silicone rubber.

[0077] In some embodiments, the liquid silicon (silicone rubber, silicone resin or a mixture of the two) used to make the functional layer 30 may also include a dye, a dispersant and an additive. In this case, by adding a dye to the liquid silicon, the functional layer 30 can have different colors, which can improve the aesthetics of the TPU composite film 1. Adding a dispersant and an additive can ensure that the dye is evenly distributed in the liquid silicon.

[0078] In some embodiments, the TPU layer 20 may be a HERZI TPU color-changing film (thermoplastic polyurethane color-changing film). In this case, since the HERZI TPU color-changing film can have richer colors than ordinary TPU composite films, for example, the HERZI TPU color-changing film can easily achieve cool metallic colors, deep matte colors, and fashionable gradient colors, especially when the TPU composite film is used for automotive interiors, it can greatly enhance the user's perception and use experience. When the TPU layer 20 is a HERZI TPU color-changing film, the functional layer 30 is preferably a highly transparent film. Thus, the color characteristics of the HERZI TPU color-changing film can be highlighted.

[0079] In some embodiments, the color of the functional layer 30 can match the color of the TPU layer 20. Thus, the overall aesthetics of the TPU composite film 1 can be improved.

[0080] In some embodiments, the TPU composite film 1 may further include a protective layer. The protective layer may be disposed on the side of the functional layer 30 away from the TPU layer 20. In this case, the protective layer may be removed when the TPU composite film 1 is used, and the protective layer as the outermost layer may play a role in protecting and reducing wear.

[0081] According to the present invention, a TPU composite film 1 can be provided which has strong tension, pulling force, toughness and aging resistance, is not easy to oxidize and turn yellow, is environmentally friendly, and is anti-fouling, hydrophobic, scratch-resistant, UV-resistant and weather-resistant.

[0082] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A TPU composite film, characterized in that: The invention comprises a functional layer, a TPU layer and an adhesive layer stacked in sequence, wherein the functional layer comprises at least one of a silicone resin and a fluorosilicone polymer, and the manufacturing method of the TPU composite film comprises: applying an adhesive on the release layer to form the adhesive layer on the release layer; arranging a TPU layer on a side of the adhesive layer away from the release layer; and arranging a functional layer on a side of the TPU layer away from the adhesive layer.

2. The TPU composite film according to claim 1, characterized in that It also includes a self-repairing coating, which is arranged on a side of the functional layer away from the TPU layer.

3. The TPU composite film according to claim 1, characterized in that: It also includes a hand-feeling layer, which is arranged on a side of the functional layer away from the TPU layer.

4. The TPU composite film according to claim 1, characterized in that An adhesive treatment agent is coated between the TPU layer and the functional layer.

5. The TPU composite film according to claim 1, characterized in that: The functional layer contains a hydrophobic agent, an anti-scratch agent, an ultraviolet resistant agent and a weather resistant agent.

6. The TPU composite film according to claim 1, characterized in that: The silicone resin includes at least one of MQ silicone resin and VMQ silicone resin.

7. The TPU composite film according to claim 1, characterized in that: A colored organic silicon layer is arranged between the functional layer and the TPU layer.

8. The TPU composite film according to claim 1, characterized in that: The TPU layer is a HERZI TPU color-changing film.

9. The TPU composite film according to claim 7, characterized in that: The colored organic silicon layer is made by adding a colorant, a dispersant and an additive into liquid silicon.

10. The TPU composite film according to claim 1, characterized in that: The release layer is also included, and the release layer is arranged on a side of the adhesive layer away from the TPU layer.

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