TPU composite film

Abstract

The utility model provides a TPU (thermoplastic polyurethane) composite film which comprises a functional layer, a TPU layer and a bonding layer which are sequentially stacked, and the functional layer is a silicon resin layer or a fluorosilicone polymer layer. According to the TPU composite film, the functional layer serving as the outermost layer can improve the antifouling performance, the hydrophobic performance, the scratch resistance, the ultraviolet ray resistance, the weather resistance and the like of the TPU composite film, the TPU layer serving as the inner layer can improve the tension, the tensile force, the toughness and the aging resistance 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 layer to form the functional layer.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of membrane material, especially to a TPU composite film. BACKGROUND

[0002] Silicone rubber film is an innovative environmentally friendly material that combines the excellent properties of silicone and the texture of leather, providing a new choice for modern industry and consumers. This material, with its unique chemical structure and physical properties, offers an environmentally friendly and durable alternative, especially in the face of environmental and ethical challenges faced by traditional animal leather and synthetic leather. The application range of silicone rubber film is very wide, from automotive interiors, furniture decoration, electronic product outer decoration, outdoor equipment, to its presence. With the progress of technology and the increasing demand for environmentally friendly materials from consumers, silicone rubber film is gradually becoming a popular choice in the market.

[0003] The existing silicone rubber film for automotive interiors and furniture products has poor toughness and wear resistance, and is not conducive to maintenance. In addition, the existing silicone rubber film for automotive interiors or furniture products still needs to improve its anti-fouling, hydrophobic, scratch-resistant, UV-resistant and weather-resistant properties. SUMMARY

[0004] The utility model aims at solving above-mentioned problem, and provides a TPU composite film which has good toughness and aging resistance, and is anti-fouling, hydrophobic, scratch-resistant, UV-resistant and weather-resistant.

[0005] To achieve the above-mentioned purpose, the utility model provides a TPU composite film, which comprises a functional layer, a TPU layer and an adhesive layer stacked in sequence, wherein the functional layer is a silicone resin layer or a fluorosilicon polymer layer.

[0006] In the utility model, the functional layer made of at least one of silicone resin and fluorosilicon 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, tensile strength, toughness and aging resistance of the TPU composite film, and it is not easy to oxidize and turn yellow, and the adhesive layer can facilitate the attachment of the TPU composite film to the target object. In addition, the functional layer of the utility model is made of organic silicone, which has the advantages of anti-fouling, high and low temperature resistance, weather resistance, hydrophobicity, antibacterial property and the like compared with ordinary silicone. When the functional layer is made of organic silicone, the TPU composite film can have good anti-fouling, high and low temperature resistance, weather resistance, hydrophobicity, antibacterial property and the like.

[0007] In the TPU composite film, optionally, the silicon resin comprises at least one of MQ silicon resin, VMQ silicon resin. The silicon resin can also comprise at least one of MQ silicon resin, VMQ silicon resin or fluorosilicone resin. In this case, the MQ silicon resin has excellent heat resistance and low-temperature resistance, good weather resistance, good water repellency, better adhesion, excellent isolation, and the like, and the outermost layer of the MQ resin can improve the heat resistance, low-temperature resistance, weather resistance, water repellency, isolation and the like of the TPU composite film; the VMQ silicon resin (vinyl MQ silicon resin) has excellent heat resistance, low-temperature resistance, film forming property (can form a uniform film layer), water repellency, aging resistance and ultraviolet radiation resistance, high transparency and low volatility, isolation and the like, and the outermost layer of the VMQ silicon resin can improve the heat resistance, low-temperature resistance, film forming property (can form a uniform film layer), water repellency, aging resistance and ultraviolet radiation resistance, high transparency and low volatility, isolation of the TPU composite film; the fluorosilicone resin has excellent high-temperature resistance, corrosion resistance, insulation, water repellency and non-stick performance, weather resistance, stain resistance, insulation, high hardness, radiation resistance and high transparency and the like, and the outermost layer of the fluorosilicone resin can improve the high-temperature resistance, corrosion resistance, insulation, water repellency and non-stick performance, weather resistance, stain resistance, insulation, high hardness, radiation resistance and high transparency of the TPU composite film, and the mixture of two or three thereof can comprehensively improve the above performance advantages.

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

[0009] In the TPU composite film, optionally, the functional layer is one layer or multiple layers. In this case, the thickness of the film can be controlled by increasing or decreasing the number of layers of the functional layer according to the needs of the user.

[0010] In the TPU composite film, optionally, a hand feeling layer is further included, and the hand feeling layer is arranged on the side of the functional layer away from the TPU layer. Thus, by taking the hand feeling layer as the outermost layer, the touch feeling of the TPU composite film can be improved.

[0011] In the TPU composite film, optionally, an adhesive treatment agent is coated between the TPU layer and the functional layer. In this case, by means of the adhesive treatment agent, the bonding force of the functional layer and the TPU layer can be enhanced, and the possibility of the TPU layer or the functional layer falling off can be reduced.

[0012] In the TPU composite film, the functional layer can be a silicone rubber layer, a silicone resin layer, or a mixed layer made of silicone rubber and silicone resin.

[0013] In the TPU composite film, the functional layer can be added with a hydrophobic agent, a scratch-resistant agent, an ultraviolet-resistant agent, and a weather-resistant agent.

[0014] In the TPU composite film, the TPU layer can include one or more TPU films.

[0015] In the TPU composite film, a colored silicone layer can be arranged between the functional layer and the TPU layer.

[0016] In the TPU composite film, the colored silicone layer can be made by adding a dyeing agent, a dispersing agent, and an additive to liquid silicone.

[0017] In the TPU composite film, the TPU layer can be a HERZI TPU color-changing film.

[0018] In the TPU composite film related in the utility model, optionally, it also includes a release layer, 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, facilitating 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, and the release layer can be removed when the TPU composite film is used.

[0019] In the TPU composite film related in the utility model, optionally, it also includes a protective layer, the protective layer is arranged on the side of the functional layer away from the TPU layer, in this case, the protective layer can be removed when the TPU composite film is used, and the protective layer as the outermost layer can play the role of protection and abrasion reduction.

[0020] In the TPU composite film related in the utility model, optionally, the color of the functional layer is matched with the color of the TPU layer, thereby, the overall ornamental property of the TPU composite film is better.

[0021] According to the utility model, a TPU composite film with strong tension, tensile strength, toughness and aging resistance, and not easy to oxidize and turn yellow, and environmental protection, stain resistance, hydrophobicity, scratch resistance, ultraviolet resistance and weather resistance can be provided. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, obviously, the drawings in the description are some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor on the premise of the drawings.

[0023] Figure 1 It is the structure schematic view of the TPU composite film of the utility model adhering to the target object.

[0024] Figure 2 It is the overall structure schematic view of the TPU composite film of the utility model. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0026] The utility model provides a kind of TPU composite film.Compared with prior art TPU composite film, the TPU composite film has the advantages of good toughness and wear resistance, and is stain-resistant, hydrophobic, scratch-resistant, UV-resistant and weather-resistant.The TPU composite film can be attached to an object for use.

[0027] The TPU composite film of the utility model can be applied to automotive interiors, furniture sofa skins, wall stickers, etc.Preferably, the TPU composite film of the utility model can be used as a car cover.

[0028] Reference Figure 1 To achieve the above object, the utility model provides a kind of TPU composite film 1.TPU composite film 1 can include function layer 30, TPU layer (Thermoplastic Polyurethane, hot melt polyurethane) 20 and bonding layer 10 stacked in sequence.

[0029] In some embodiments, the function layer 30 can be a silicone layer or a fluorosilicone polymer layer.

[0030] In some embodiments, the function layer 30 can further include silicone rubber.

[0031] In some embodiments, the function layer 30 can be a silicone rubber layer.In some embodiments, the silicone rubber layer can be one or more layers.In some embodiments, the multi-layer silicone rubber layer can be made by coating multiple layers of liquid silicone rubber on the TPU layer 20.In some embodiments, the color of the silicone rubber layer can be transparent or colored.For example, colorants can be added to the liquid silicone rubber to make colored silicone rubber.In some embodiments, the multi-layer silicone rubber layer can include transparent silicone rubber layers or colored silicone layers.Silicone rubber layers have excellent stain-resistant, hydrophobic, scratch-resistant, UV-resistant and weather-resistant properties.By using silicone rubber layers as the outermost layer, the TPU composite film 1 produced can have excellent stain-resistant, hydrophobic, scratch-resistant, UV-resistant and weather-resistant properties.

[0032] In some embodiments, the functional layer 30 can be a silicone layer. In some embodiments, the silicone layer can be one or more layers. In some embodiments, the multiple layers of silicone layer can be made by coating multiple layers of liquid silicone on the TPU layer 20. In some embodiments, the color of the silicone layer can be transparent or colored. For example, colorant can be added to the liquid silicone to make the silicone colored. In some embodiments, the multiple layers of silicone layer can include both transparent silicone layer and colored 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. By taking the silicone layer as the outermost layer, the TPU composite film 1 made thereby can 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 can be a mixed layer made of silicone and fluorosilicone polymer.

[0034] In some embodiments, the functional layer 30 can be a mixed layer made of silicone rubber and silicone. In this way, the functional layer 30 can integrate the performance advantages of silicone rubber and silicone.

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

[0036] In the utility model, the functional layer made of at least one of silicone and fluorosilicone polymer as the outermost layer can improve the anti-fouling, hydrophobic, scratch-resistant, ultraviolet-resistant and weather-resistant properties of the TPU composite film, the TPU layer as the inner layer can improve the tension, tensile strength, toughness and aging-resistant properties of the TPU composite film, and the TPU composite film is not prone to oxidation and yellowing, and the adhesive layer can facilitate the TPU composite film to be attached to the target object; in addition, the functional layer of the utility model is made of silicone, and the silicone rubber has the advantages of anti-fouling, high and low temperature resistance, weather resistance, hydrophobicity and antibacterial property compared with ordinary silicone rubber, and when the functional layer is made of silicone rubber, the TPU composite film can have good anti-fouling, high and low temperature resistance, weather resistance, hydrophobicity and antibacterial property.

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

[0038] In some embodiments, the silicone layer comprises at least one of MQ silicone, VMQ silicone or fluorosilicone. In this case, the MQ silicone has excellent heat resistance and low-temperature resistance, good weather resistance, good water repellency, better adhesion, excellent isolation, and making the MQ silicone as the outermost layer can improve the heat resistance, low-temperature resistance, weather resistance, water repellency, and isolation of the TPU composite film. The VMQ silicone (vinyl MQ silicone) has excellent heat resistance, low-temperature resistance, film-forming property (can form a uniform film layer), water repellency, aging resistance and anti-ultraviolet radiation, high transparency and low volatility, and isolation, and making the VMQ silicone as the outermost layer can improve the heat resistance, low-temperature resistance, film-forming property (can form a uniform film layer), water repellency, aging resistance and anti-ultraviolet radiation, high transparency and low volatility, and isolation of the TPU composite film. The fluorosilicone has excellent high-temperature resistance, corrosion resistance, insulation, water repellency and non-stick properties, weather resistance, stain resistance, insulation, high hardness, radiation resistance and high transparency, and making the fluorosilicone as the outermost layer can improve the high-temperature resistance, corrosion resistance, insulation, water repellency and non-stick properties, weather resistance, stain resistance, insulation, high hardness, radiation resistance and high transparency of the TPU composite film. The mixture of two or three of them can comprehensively improve the above-mentioned performance advantages.

[0039] In some embodiments, the functional layer 30 can be a VMQ resin layer. In some embodiments, the VMQ resin layer can be one or more layers. In some embodiments, the multi-layer VMQ resin layer can 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 can be transparent or colored. For example, colorants can be added to the VMQ resin to make colored VMQ resin. In some embodiments, the multi-layer VMQ resin layer can include both transparent and colored VMQ resin layers. The VMQ resin layer has excellent hydrophobicity, transparency and touch feeling, and making the VMQ resin layer as the outermost layer can make the prepared TPU composite film 1 have excellent hydrophobicity, transparency and touch feeling.

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

[0041] In some embodiments, the functional layer 30 can include multiple types of silicone rubber layers, silicone resin layers, and hybrid layers. In other words, the functional layer 30 can be formed by any permutation and combination of the three types of layers. Among them, the silicone rubber layer can be one or multiple layers, the silicone resin layer can be one or multiple layers, and the hybrid layer can be one or multiple layers. The multiple layers of silicone rubber, silicone resin, and hybrid can be arranged in any permutation and combination.

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

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

[0044] Here, examples are not listed one by one.

[0045] In some embodiments, the TPU composite film 1 can further include a self-repairing coating, which can be arranged on the side of the functional layer 30 away from the TPU layer 20. In this case, by arranging the self-repairing coating on the surface of the functional layer 30, the self-repairing function of the indentation 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 can be a water-based film. The water-based film can be attached to the surface of the functional layer 30 by adsorption.

[0047] In some embodiments, the functional layer 30 can be added with at least one of a mildew-proof agent and an antibacterial agent. In this way, the TPU composite film 1 produced can have the functions of mildew-proofing and antibacterial, and the growth of bacteria and the like on the surface of the film can be reduced, thereby improving the service life of the film.

[0048] In some embodiments, the mildew-proof agent can be a silicone quaternary ammonium salt antibacterial agent, dibutyltin dilaurate, a silicone copper quaternary ammonium salt, etc.

[0049] In some embodiments, the antibacterial agent can be a silicone quaternary ammonium salt antibacterial agent. For example, dimethyl octadecyl [3-trimethoxysilyl propyl] ammonium chloride, dimethyl octadecyl [3-methyl dimethoxysilyl propyl] ammonium chloride, dimethyl octadecyl [3-triethoxysilyl propyl] ammonium chloride, etc.

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

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

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

[0053] In the present application, the functional layer 30 as the outermost layer can improve the anti-fouling, hydrophobic, scratch-resistant, UV-resistant and weather-resistant properties of the TPU composite film 1, the TPU layer 20 as the inner layer can improve the tensile strength, tensile strength, toughness and aging resistance of the TPU composite film 1, and is not prone to oxidation and yellowing, and the TPU layer 20 as the base layer can facilitate the formation of the functional layer thereon. In addition, the TPU composite film 1 of the present application uses environmentally friendly materials, which has good environmental performance.

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

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

[0056] In some embodiments, the thickness of the release layer 40 can be 10 microns to 100 microns. Preferably, the thickness of the release layer 40 can be 50 microns.

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

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

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

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

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

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

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

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

[0065] In some embodiments, an adhesive treatment agent can be coated between the TPU layer 20 and the functional layer 30. In this way, the adhesion between the functional layer 30 and the TPU layer 20 can be enhanced, and the bonding force of the functional layer 30 and the TPU layer 20 can be improved.

[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 colors of the functional layer 30 and the TPU layer 20 can be transparent. In this way, the light reflectivity of the TPU composite film 1 can be enhanced, and the brightness inside the car can be improved when the TPU composite film 1 is applied to the interior of the car.

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

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

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

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

[0072] In some embodiments, the weather-resistant agent can be an antioxidant, such as a hindered phenolic antioxidant. The weather-resistant agent can also be a light stabilizer, such as a HALS or other benzotriazole.

[0073] In some embodiments, at least one layer of silicone rubber can be provided between the functional layer 30 and the TPU layer 20. The at least one layer of silicone rubber can serve to connect and wear-resistant. In some embodiments, the at least one layer of silicone rubber can be transparent, colored, etc. In some embodiments, the multiple layers of silicone rubber can include both colored silicone layers and transparent silicone layers.

[0074] In some embodiments, a colored silicone layer can be provided between the functional layer 30 and the TPU layer 20. In this case, by providing a colored silicone layer between the functional layer 30 and the TPU layer 20, the appearance of the TPU composite film 1 can have different colors, and the ornamental value of the TPU composite film 1 can be improved.

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

[0076] In some embodiments, the colored silicone layer can be made by adding a dyeing agent, a dispersing agent, and an additive to liquid silicone. In this case, by adding a dyeing agent to liquid silicone, the colored silicone layer produced can have different colors, and the ornamental value of the TPU composite film 1 can be improved. The addition of a dispersing agent and an additive can ensure that the dyeing agent is evenly distributed in the liquid silicone.

[0077] In some embodiments, the liquid silicon (silicone rubber, silicone resin or mixture of both) used to make the functional layer 30 can 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 be made to have different colors, which can improve the ornamental value of the TPU composite film 1, and the addition of 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 can be a HERZI TPU color-changing film (thermoplastic polyurethane color-changing film). In this case, since the HERZI TPU color-changing film can have more 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, which can greatly improve the user's visual perception and use experience when the TPU composite film is used for automotive interiors. When the TPU layer 20 is a HERZI TPU color-changing film, the functional layer 30 is preferably a film with high transparency. In this way, the color properties of the HERZI TPU color-changing film can be highlighted.

[0079] In some embodiments, the color of the functional layer 30 can be adapted to the color of the TPU layer 20. In this way, the overall ornamental value of the TPU composite film 1 can be improved.

[0080] In some embodiments, the TPU composite film 1 can also include a protective layer. The protective layer can be disposed on the side of the functional layer 30 away from the TPU layer 20. In this case, the TPU composite film 1 can be used with the protective layer removed, and the protective layer as the outermost layer can serve to protect and reduce wear.

[0081] According to the present application, a TPU composite film 1 with strong tension, tensile strength, toughness and aging resistance, which is not prone to oxidation and yellowing, and is environmentally friendly, anti-fouling, hydrophobic, scratch-resistant, UV-resistant and weather-resistant, can be provided.

[0082] The above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A TPU composite film, characterized in that, It includes a functional layer, a TPU layer and an adhesive layer stacked in sequence, wherein the functional layer is a silicone resin layer or a fluorosilicone polymer layer.

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

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

5. The TPU composite film according to claim 1, characterized in that, The functional layer contains hydrophobic agents, scratch-resistant agents, UV-resistant agents, and weather-resistant agents.

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 silicone layer is disposed 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 thermoplastic polyurethane color-modified film.

9. The TPU composite film according to claim 7, characterized in that, The colored organosilicon layer is made by adding dyes, dispersants and additives to liquid silicon.

10. The TPU composite film according to claim 1, characterized in that, It also includes a release layer, which is disposed on the side of the adhesive layer away from the TPU layer.

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