Thermoplastic resin composite car cover film

Abstract

The utility model relates to car cover film product field, concretely relates to a thermoplastic resin composite car cover film, the utility model discloses a thermoplastic resin composite car cover film, including first thermoplastic resin structure subassembly, high transparency thermoplastic resin subassembly and second thermoplastic resin structure subassembly that stack in proper order, first thermoplastic resin structure subassembly includes first transition part, and second thermoplastic resin structure subassembly includes second transition part, first transition part is configured to increase the peeling strength between first thermoplastic resin structure subassembly and high transparency thermoplastic resin subassembly, and second transition part is configured to increase the peeling strength between second thermoplastic resin structure subassembly and high transparency thermoplastic resin subassembly, the utility model discloses a thermoplastic resin composite car cover film, increases the peeling strength between layer and layer, and can reduce manufacturing cost while improving composite car cover film high transmittance.

Description

Technical Field

[0001] This utility model relates to the field of car wrap products, specifically to a thermoplastic resin composite car wrap. Background Technology

[0002] Paint protection film, also known as invisible car wrap, is a high-performance, environmentally friendly automotive paint protection film widely used in the automotive detailing and maintenance industry. It's a common name for transparent paint protection film. It boasts superior toughness and, once applied, isolates the car paint from the air, providing long-lasting protection. Polyurethane film (TPU film) possesses excellent properties such as superior flexibility, abrasion resistance, easy application, and resistance to collisions and scratches, making it a commonly used material for paint protection film. It effectively protects the car's paint from damage caused by air, rain, and sunlight.

[0003] However, TPU car wrap films are expensive and have limited functionality. Currently, car wrap film manufacturers are actively modifying TPU or developing composite films to reduce manufacturing costs or increase functionality. However, composite car wrap films suffer from lower peel strength between layers due to differences in chemical composition, which affects their usability.

[0004] To address the above issues, there is an urgent need to invent a thermoplastic resin composite car wrap film to solve the problem that the peel strength between the layers of the composite car wrap film does not meet the usage requirements. Utility Model Content

[0005] This invention provides a thermoplastic resin composite car wrap film, which aims to solve the problem of adhesion between layers of multilayer composite car wrap film.

[0006] To solve the above technical problems, the present invention adopts the following technical solution.

[0007] A thermoplastic resin composite car wrap film includes a first thermoplastic resin structural component, a high-transparency thermoplastic resin component, and a second thermoplastic resin structural component stacked sequentially; the first thermoplastic resin structural component includes a first transition portion, and the second thermoplastic resin structural component includes a second transition portion. The first transition portion and the second transition portion are respectively bonded to the first surface and the second surface of the highly transparent thermoplastic resin component, and the first surface and the second surface are arranged opposite to each other along the thickness direction of the highly transparent thermoplastic resin component; The first transition portion is configured to increase the peel strength between the first thermoplastic resin structural component and the high-transparency thermoplastic resin component, and the second transition portion is configured to increase the peel strength between the second thermoplastic resin structural component and the high-transparency thermoplastic resin component.

[0008] According to the thermoplastic resin composite car wrap film described above, the thickness of the first transition portion is 5μm~30μm, and / or the thickness of the second transition portion is 5μm~30μm.

[0009] According to the thermoplastic resin composite car wrap film described above, the high-transparency thermoplastic resin component includes a polyvinyl acetal resin layer. Preferably, the high-transparency thermoplastic resin component includes a polyvinyl butyral resin layer.

[0010] According to the thermoplastic resin composite car wrap film described above, the first thermoplastic resin structural component includes a first TPU layer and a first mixture layer formed of TPU and polyvinyl acetal resin, wherein the first mixture layer is configured as the first transition portion. And / or, the second thermoplastic resin structural component includes a second TPU layer and a second mixture layer formed of TPU and polyvinyl acetal resin, the second mixture layer being configured as the second transition portion.

[0011] According to the thermoplastic resin composite car wrap film described above, the first thermoplastic resin structural component is an integral structural layer, and the first thermoplastic resin structural component includes a first TPU region and a first mixture region formed of TPU and polyvinyl acetal resin, wherein the first mixture region is configured as the first transition portion. And / or, the second thermoplastic resin structural component is an integral structural layer, and the second thermoplastic resin structural component includes a second TPU region and a second mixture region formed of TPU and polyvinyl acetal resin, the second mixture region being configured as the second transition portion.

[0012] According to the thermoplastic resin composite car wrap film described above, the first mixture layer is a single-layer structure or a structure of two or more layers; and / or, the second mixture layer is a single-layer structure or a structure of two or more layers.

[0013] According to the thermoplastic resin composite car wrap film described above, the thickness ratio of the first thermoplastic resin structural component, the high-transparency thermoplastic resin component, and the second thermoplastic resin structural component is (1~3):(3~6):(1~3).

[0014] According to the thermoplastic resin composite car wrap film described above, the thickness ratio of the first transition portion to the thickness of the first thermoplastic resin structural component is (20~70):100.

[0015] According to the thermoplastic resin composite car wrap film described above, the first mixture layer has a structure of two or more layers, and the thickness of each layer is 6μm to 15μm; and / or, the second mixture layer has a structure of two or more layers, and the thickness of each layer is 6μm to 15μm.

[0016] According to the thermoplastic resin composite car wrap film described above, the thickness of the first thermoplastic resin structural component is not less than the thickness of the second thermoplastic resin structural component, and the second thermoplastic resin structural component is configured to adhere to one side of the car body.

[0017] Compared with the prior art, the present invention has the following technical effects: The thermoplastic resin composite car wrap film provided by this utility model has a first transition portion and a second transition portion prepared by a mixture, which increases the compatibility with adjacent layers and increases the adhesion strength between layers. The composite car wrap film provided by this utility model can reduce the manufacturing cost of the car wrap film while improving the high light transmittance of the composite car wrap film by adding low-cost high-transparency components.

[0018] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This diagram illustrates the structure of a thermoplastic resin composite car wrap film according to the present invention. Figure 2 This diagram illustrates the structure of a thermoplastic resin composite car wrap film according to Embodiment 1 of the present invention. Figure 3 This diagram illustrates the structure of a thermoplastic resin composite car wrap film according to Embodiment 2 of the present invention. Figure 4 This diagram shows a structural schematic of a thermoplastic resin composite car wrap film according to Embodiment 3 of this utility model; In the picture: 1. First thermoplastic resin structural component; 2. High-transparency thermoplastic resin component; 3. Second thermoplastic resin structural component; 11. First transition portion; 31. Second transition portion; 12. First TPU layer; 32. Second TPU layer; 13. First TPU region; 33. Second TPU region. Detailed Implementation

[0021] 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0022] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0023] In the description of this utility model, it should be understood that the use of terms such as "first" and "second" to define the components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this utility model.

[0024] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0025] Polyvinyl butyral (PVB) contains relatively long branches, exhibiting good flexibility, a low glass transition temperature, and high tensile and impact strength. PVB resin powder with the addition of a certain amount of plasticizer produces PVB films with excellent transparency, good light resistance, water resistance, heat resistance, and cold resistance. PVB films can be widely used in architectural laminated glass, automotive laminated glass, solar photovoltaic glass, bulletproof glass, and soundproof glass. Furthermore, the manufacturing cost of PVB is significantly lower than that of TPU.

[0026] Polyurethane (TPU) is currently the main raw material for high-end car wrap films. However, TPU is expensive, and the light transmittance of the car wrap film decreases with increasing thickness. To solve this problem, the inventors used a three-layer structure of TPU / PVB / TPU to prepare the car wrap film. However, the interfacial compatibility and interfacial adhesion between PVB and TPU are poor. To solve this problem, the inventors added a transition layer between the PVB layer and the TPU layer. The transition layer is prepared using a mixture of PVB resin and TPU resin.

[0027] Please see Figure 1-4As shown, a thermoplastic resin composite car wrap film includes a first thermoplastic resin structural component 1, a high-transparency thermoplastic resin component 2, and a second thermoplastic resin structural component 3, which are stacked sequentially. The first thermoplastic resin structural component 1 includes a first transition portion 11 formed by the first thermoplastic resin and the high-transparency thermoplastic resin, and the second thermoplastic resin structural component 3 includes a second transition portion 31 formed by the second thermoplastic resin and the high-transparency thermoplastic resin. Specifically, the first thermoplastic resin structural component and the second thermoplastic resin structural component may use the same or different materials. The thermoplastic resin preparation mainly provides high structural strength, high wear resistance, high toughness, and high scratch resistance for the composite car wrap film; the high-transparency thermoplastic resin component is prepared from a different thermoplastic resin than the first or second thermoplastic resin structural component. Compared with the first and second thermoplastic resin structural components, the high-transparency thermoplastic resin component has a higher transmittance of sunlight or visible light, generally greater than 85%, and preferably, the transmittance of the high-transparency thermoplastic resin component is not less than 90%. The first transition portion 11 and the second transition portion 31 are respectively bonded to the first surface and the second surface of the highly transparent thermoplastic resin component 2, and the first surface and the second surface are arranged opposite to each other along the thickness direction of the highly transparent thermoplastic resin component 2. The first transition portion 11 is configured to increase the peel strength between the first thermoplastic resin structural component 1 and the high transparency thermoplastic resin component 2, and the second transition portion 31 is configured to increase the peel strength between the second thermoplastic resin structural component 3 and the high transparency thermoplastic resin component 2.

[0028] In one specific embodiment, the thickness of the first transition portion 11 is 5μm to 30μm, and / or the thickness of the second transition portion is 5μm to 30μm.

[0029] In one specific embodiment, the high-transparency thermoplastic resin component 2 includes a polyvinyl butyral resin layer. Exemplarily, the polyvinyl butyral resin layer is a polyvinyl butyral resin layer. It is understood that the high-transparency thermoplastic resin component is a polyvinyl butyral resin layer, i.e., a PVB layer, formed from polyvinyl butyral resin, plasticizers, and other essential additives. Specifically, it can be a PVB film layer as commonly known, as long as its light transmittance meets the usage requirements. Exemplarily, the light transmittance is greater than 85%, preferably not less than 90%, and the light transmittance is tested according to the GB / T32020 standard.

[0030] In one specific embodiment, the first thermoplastic resin structural component 1 includes a first TPU layer 12 and a first mixture layer formed of TPU and polyvinyl butyral resin, the first mixture layer being configured as the first transition portion 11; the weight ratio of TPU to polyvinyl butyral in the first mixture layer is (1~5):(1~5), preferably, the weight ratio of TPU to polyvinyl butyral in the first mixture layer is 1:1.

[0031] And / or, the second thermoplastic resin structural component 3 includes a second TPU layer 32 and a second mixture layer formed of TPU and polyvinyl butyral resin, the second mixture layer being configured as the second transition portion 31. The weight ratio of TPU to polyvinyl butyral in the second mixture layer is (1~5):(1~5), preferably, the weight ratio of TPU to polyvinyl butyral in the second mixture layer is 1:1.

[0032] Specifically, the first transition section and the second transition section can be made of a mixture layer prepared by mixing recycled PVB film and TPU raw materials. Since the mixture layer contains both PVB resin and TPU resin, it can effectively solve the problem of poor interfacial compatibility between PVB and TPU and increase the adhesion between layers.

[0033] In one specific embodiment, the first thermoplastic resin structural component 1 is an integral structural layer, and the first thermoplastic resin structural component 1 includes a first TPU region 13 and a first mixture region formed of TPU and polyvinyl butyral resin, the first mixture region being configured as the first transition portion 11. And / or, the second thermoplastic resin structural component 3 is an integral structural layer, and the second thermoplastic resin structural component includes a second TPU region 33 and a second mixture region formed of TPU and polyvinyl butyral resin, the second mixture region being configured as the second transition portion 31.

[0034] In one specific embodiment, the first mixture layer is a single-layer structure or a structure of two or more layers; and / or, the second mixture layer is a single-layer structure or a structure of two or more layers.

[0035] In one specific embodiment, the thickness ratio of the first thermoplastic resin structural component 1, the highly transparent thermoplastic resin component 2, and the second thermoplastic resin structural component 3 is (1~3):(3~6):(1~3). Preferably, the thickness ratio of the first thermoplastic resin structural component 1, the highly transparent thermoplastic resin component 2, and the second thermoplastic resin structural component 3 is 1:2:1.

[0036] In one specific embodiment, the thickness ratio of the first transition portion 11 to the thickness of the first thermoplastic resin structural component 1 is (20~70):100.

[0037] In one specific embodiment, the first mixture layer has two or more layers, and the thickness of each layer is 6μm to 15μm; and / or, the second mixture layer has two or more layers, and the thickness of each layer is 6μm to 15μm.

[0038] In one specific embodiment, the thickness of the first thermoplastic resin structural component 1 is not less than the thickness of the second thermoplastic resin structural component 3, and the second thermoplastic resin structural component 3 is configured to fit one side of the vehicle body. Example

[0039] Please see Figure 2 As shown, a thermoplastic resin composite car wrap film includes a polyvinyl butyral resin layer (i.e., a PVB layer). The PVB layer has a light transmittance of not less than 90%. As a highly transparent thermoplastic resin component, the PVB layer provides high transparency for the entire composite car wrap film. On opposite sides of the PVB layer are a first thermoplastic resin structural component and a second thermoplastic resin structural component. The regions of the first and second thermoplastic resin structural components that are far from the PVB layer in the thickness direction are TPU regions (first TPU region or second TPU region) composed of a polyurethane layer. The regions adjacent to the PVB layer are transition regions (first mixture region or second mixture region), which are formed by TPU raw materials and PVB film sheets. Both the first and second thermoplastic resin structural components are single-layer integral structures. Figure 2 The dotted lines in the diagram are not actually present; they are added for ease of description. The thickness of both the first and second thermoplastic resin structural components is 0.05 mm to 0.07 mm, the thickness of the first and second transition zones is 6 μm to 30 μm, and the thickness of the PVB layer is 0.1 mm ± 0.02 mm. The weight ratio of PVB content to TPU content in the transition zones (first and second mixture zones) is 1:1. Example

[0040] Please see Figure 3A thermoplastic resin composite car wrap film includes a polyvinyl butyral resin layer, a first TPU layer, a first mixture layer, a second TPU layer, and a second mixture layer. The first and second mixture layers are transition layers formed by mixing recycled PVB resin film and TPU. Both the first and second mixture layers are single-layer structures with a thickness of 15μm to 30μm. The weight ratio of PVB content to TPU content in the first and second mixture layers is 1:1, 1:3, 2:3, 3:2, etc. The thicknesses of the polyvinyl butyral resin layer, the first TPU layer, and the second TPU layer are 0.09mm to 0.12mm, 0.02mm to 0.05mm, and 0.02mm to 0.05mm, respectively. Example

[0041] Please see Figure 4 A thermoplastic resin composite car wrap film includes a polyvinyl acetal resin layer, a first TPU layer, a first mixture layer, a second TPU layer, and a second mixture layer. The first and second mixture layers are transition layers formed by mixing recycled PVB resin film and TPU. Unlike Example 2, in Example 3, both the first and second mixture layers have a four-layer structure. Furthermore, the PVB content in both the first and second mixture layers gradually decreases from the inside to the outside, while the TPU content gradually increases (the inside is closer to the polyvinyl acetal resin layer). (The side of the resin is the interior). For example, the weight ratio of PVB resin to TPU resin in layers 101, 102, 103, and 104 is 8:2, 6:4, 4:6, and 2:8, respectively. The weight ratio of PVB resin to TPU resin in layers 301, 302, 303, and 304 is 8:2, 6:4, 4:6, and 2:8, respectively. The thickness of layers 101, 102, 103, 104, 301, 302, 303, and 304 is 6μm to 12.5μm.

[0042] The above description is only an exemplary embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A thermoplastic resin composite car wrap film, characterized in that, It includes a first thermoplastic resin structural component (1), a highly transparent thermoplastic resin component (2), and a second thermoplastic resin structural component (3) stacked sequentially; the first thermoplastic resin structural component (1) includes a first transition portion (11), and the second thermoplastic resin structural component (3) includes a second transition portion (31); The first transition portion (11) and the second transition portion (31) are respectively bonded to the first surface and the second surface of the high transparency thermoplastic resin component (2), and the first surface and the second surface are arranged opposite to each other along the thickness direction of the high transparency thermoplastic resin component (2). The first transition portion (11) is configured to increase the peel strength between the first thermoplastic resin structural component (1) and the high transparency thermoplastic resin component (2), and the second transition portion (31) is configured to increase the peel strength between the second thermoplastic resin structural component (3) and the high transparency thermoplastic resin component (2).

2. The thermoplastic resin composite car wrap film according to claim 1, characterized in that, The thickness of the first transition portion (11) is 5 μm to 30 μm; and / or the thickness of the second transition portion (31) is 5 μm to 30 μm.

3. A thermoplastic resin composite car wrap film according to claim 1 or 2, characterized in that, The highly transparent thermoplastic resin component (2) includes a polyvinyl acetal resin layer.

4. The thermoplastic resin composite car wrap film according to claim 3, characterized in that, The first thermoplastic resin structural component (1) includes a first TPU layer (12) and a first mixture layer formed of TPU and polyvinyl acetal resin, the first mixture layer being configured as the first transition portion (11). And / or, the second thermoplastic resin structural component (3) includes a second TPU layer (32) and a second mixture layer formed of TPU and polyvinyl acetal resin, the second mixture layer being configured as the second transition portion (31).

5. The thermoplastic resin composite car wrap film according to claim 3, characterized in that, The first thermoplastic resin structural component (1) is an integral structural layer, and the first thermoplastic resin structural component (1) includes a first TPU region (13) and a first mixture region formed of TPU and polyvinyl acetal resin, the first mixture region being configured as the first transition portion (11). And / or, the second thermoplastic resin structural component (3) is an integral structural layer, and the second thermoplastic resin structural component includes a second TPU region (33) and a second mixture region formed of TPU and polyvinyl acetal resin, the second mixture region being configured as the second transition portion (31).

6. The thermoplastic resin composite car wrap film according to claim 4, characterized in that, The first mixture layer is a single-layer structure or a structure of two or more layers; and / or, the second mixture layer is a single-layer structure or a structure of two or more layers.

7. The thermoplastic resin composite car wrap film according to claim 1, characterized in that, The thickness ratio of the first thermoplastic resin structural component (1), the high-transparency thermoplastic resin component (2), and the second thermoplastic resin structural component (3) is (1~3):(3~6):(1~3).

8. The thermoplastic resin composite car wrap film according to claim 1, characterized in that, The thickness ratio of the first transition portion (11) to the thickness of the first thermoplastic resin structural component (1) is (20~70):

100.

9. The thermoplastic resin composite car wrap film according to claim 4, characterized in that, The first mixture layer has two or more layers, and the thickness of each layer is 6μm to 15μm; and / or, the second mixture layer has two or more layers, and the thickness of each layer is 6μm to 15μm.

10. The thermoplastic resin composite car wrap film according to claim 7, characterized in that, The thickness of the first thermoplastic resin structural component (1) is not less than the thickness of the second thermoplastic resin structural component (3), which is configured to fit one side of the car body.

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