Weatherable retroreflective film

Abstract

The utility model discloses a kind of weather resistance reflective film, it includes anti-aging layer, the anti-aging layer bottom is provided with reflective layer, the reflective layer bottom is provided with weather layer, the weather layer bottom is provided with adhesive layer, the adhesive layer bottom is provided with release layer, a kind of weather resistance reflective film, by the weather layer that microcapsule in the anti-aging layer inside with upper functional layer, support layer and release layer total forming, active repair and firm integration structure are realized, greatly prolong service life, second, by particle one in the anti-aging layer inside with particle two in upper functional layer, so that this reflective film has self-cleaning ability and super strong visual performance, especially remarkable effect under harsh environment.

Description

Technical Field

[0001] This utility model relates to the field of reflective film technology, specifically a weather-resistant reflective film. Background Technology

[0002] Reflective film is a special material that uses optical principles to reflect light back to the source. It is usually composed of multiple layers such as a weather-resistant film layer, a glass bead layer, a reflective layer, and an adhesive layer. Its core function is to achieve efficient light reflection through glass microbeads or microprism technology. It is widely used in traffic signs, vehicle markings, outdoor advertising and other fields.

[0003] The prior art patent document CN221343438U discloses a weather-resistant reflective film, comprising a reflective film body and a shell. The shell contains a rod that matches the reflective film body. A cover plate is provided on the shell via a plug-in assembly. A groove is formed on one side of the shell, and a guide assembly is provided on the side of the shell near the groove. An auxiliary assembly is provided on the outer wall of the groove. This invention allows for convenient storage and protection of the reflective film body, preventing exposure to the outside world when not in use. It avoids wind, sun, dust, and moisture, ensuring its service life. It also facilitates replacement after use. The shell is reusable multiple times. Furthermore, it allows for easy pulling and cutting during application, making it convenient. In addition to ensuring reflective effect, the reflective film body also improves heat resistance and weather resistance.

[0004] Although the device has many beneficial effects, it still has the following problems: It adopts a simple physical layered structure with a large number of physical interfaces between the layers. Under long-term thermal stress, ultraviolet rays and moisture erosion, the interfaces are prone to peeling and cracking, leading to the failure of the overall structure. Secondly, the functions of each layer are isolated, and the anti-aging layer is only a consumable protection. Once it is damaged or the additives are exhausted, it will permanently fail. Moreover, it lacks self-cleaning ability, and the surface is prone to dust accumulation and contamination, which leads to a rapid decline in reflective performance. Utility Model Content

[0005] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0006] 1. Technical problems to be solved: To address the aforementioned issues of easy failure of interlayer interfaces and passive and limited functionality, this utility model is proposed.

[0007] Therefore, the purpose of this utility model is to provide a weather-resistant reflective film. By forming a weather-resistant layer together with microcapsules inside the anti-aging layer, the upper functional layer, the support layer, and the release layer, an integrated structure of active repair and robustness is achieved, which greatly extends the service life. At the same time, through particles one inside the anti-aging layer and particles two inside the upper functional layer, this reflective film has self-cleaning ability and super visual performance, especially in harsh environments.

[0008] 2. Technical Solution: To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution: A weather-resistant reflective film includes an anti-aging layer, a reflective layer disposed at the bottom of the anti-aging layer, a weather-resistant layer disposed at the bottom of the reflective layer, an adhesive layer disposed at the bottom of the weather-resistant layer, and a release layer disposed at the bottom of the adhesive layer.

[0009] As a preferred embodiment of the weather-resistant reflective film of this utility model, the anti-aging layer contains a plurality of particles and a plurality of microcapsules.

[0010] In a preferred embodiment of the weather-resistant reflective film of this utility model, the reflective layer includes a reflector, which has a triangular structure.

[0011] In a preferred embodiment of the weather-resistant reflective film of this utility model, the weather-resistant layer includes an upper functional layer, a support layer is fixedly connected to the bottom of the upper functional layer, and an isolation layer is fixedly connected to the bottom of the support layer.

[0012] In a preferred embodiment of the weather-resistant reflective film of this utility model, the release layer includes a bottom layer, and a coating layer is fixedly connected to the bottom of the bottom layer.

[0013] As a preferred embodiment of the weather-resistant reflective film of this utility model, the upper functional layer is wrapped with a plurality of particles II, the particles II having an elliptical structure and being distributed in a gradient.

[0014] In a preferred embodiment of the weather-resistant reflective film of this utility model, the first particle has a spherical structure, the microcapsule has an oblong structure, and both the first particle and the microcapsule are randomly distributed.

[0015] 3. Beneficial effects: Compared with the prior art, the beneficial effects of this utility model are: This weather-resistant reflective film, through an active repair mechanism composed of microcapsules, enables the film to self-repair when it is scratched or aged, turning passive consumption into active maintenance. At the same time, the co-extruded three-layer weather-resistant layer design integrates key functions into a seamless whole, effectively eliminating the risk of interlayer delamination and ensuring the long-term reliability of the product under harsh weather conditions. This weather-resistant reflective film, through particle one, endows the film with superhydrophobic properties, enabling rainwater self-cleaning, greatly reducing maintenance costs and maintaining the durability of reflective brightness. Particle two, which are distributed in a gradient in the upper functional layer, constitutes a refractive index transition zone, reducing light scattering loss and ensuring that light can still be reflected efficiently in low visibility environments such as fog and rain, making the visual warning effect more prominent. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. 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. Among them: Figure 1 This is a schematic diagram of the overall structure of a weather-resistant reflective film according to the present invention; Figure 2 This is an exploded view of the overall structure of a weather-resistant reflective film according to this utility model; Figure 3 This is a schematic diagram of the reflective layer structure of a weather-resistant reflective film according to this utility model; Figure 4 This is a partial structural diagram of the anti-aging layer of a weather-resistant reflective film according to this utility model; Figure 5 This is a partial structural diagram of the weather-resistant layer of a weather-resistant reflective film according to this utility model.

[0017] Explanation of the labels in the diagram: 100, anti-aging layer; 110, particle one; 120, microcapsule; 200, reflective layer; 210, reflector; 300, weather-resistant layer; 310, upper functional layer; 311, particle two; 320, support layer; 330, isolation layer; 400, adhesive layer; 500, release layer; 510, bottom layer; 520, coating layer. Detailed Implementation

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] This utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of this utility model. In actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0020] The orientation or positional relationship indicated in the terminology is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing the present invention and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0021] The term "connection method" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The embodiments of this utility model will now be described in further detail with reference to the accompanying drawings.

[0023] This utility model provides an overall structural schematic diagram of an embodiment of a weather-resistant reflective film, including: Please see Figures 1-5 This embodiment of a weather-resistant reflective film includes an anti-aging layer 100, which is made of a fluoropolymer with excellent weather resistance. It is mainly used to resist material degradation caused by environmental factors such as ultraviolet rays, high temperature, and oxidation. Through superhydrophobic effect, it makes it difficult for dust and dirt to adhere and is easily washed away by rainwater, maintaining high light transmittance and reflectivity. A reflective layer 200 is connected to the bottom of the anti-aging layer 100 by a high-strength pressure-sensitive adhesive. A weather-resistant layer 300 is connected to the bottom of the reflective layer 200 by a hot-pressing method. An adhesive layer 400 is connected to the bottom of the weather-resistant layer 300 by a coating composite method. The adhesive layer 400 is made of weather-resistant acrylic pressure-sensitive adhesive, which is used to provide strong adhesion to bond the entire film to various substrates. A release layer 500 is physically bonded to the bottom of the adhesive layer 400.

[0024] It is worth noting that, in order to achieve the surface hydrophobicity and self-repair of the anti-aging layer 100, specifically, the anti-aging layer 100 contains multiple particles 110, which are hydrophobic nano-silica particles used to achieve the self-cleaning function. By forming a micro-nano structure on the surface, a "lotus effect" is generated, allowing rainwater to easily roll off and carry away dust and dirt, thereby maintaining surface cleanliness and high reflectivity for a long time, significantly reducing maintenance costs. The anti-aging layer 100 also contains multiple microcapsules 120, which are repair capsules with a core of liquid light stabilizer and ultraviolet absorber and an outer shell of urea-formaldehyde resin, used to achieve the active repair function. When external scratches or aging wear cause damage, they can actively release repair components to compensate for the damage, changing the anti-aging ability from "passive consumption" to "active maintenance", greatly extending the film life.

[0025] Next, in order to improve reflectivity, the reflective layer 200 specifically includes a reflector 210. The reflector 210 is made of cross-linked acrylic resin with a high refractive index, which is used to achieve efficient retroreflection. The reflector 210 has a triangular structure, which can effectively reflect the incident light back along the original path, thereby forming an extremely bright and clear marking effect.

[0026] Meanwhile, in order to improve the weather resistance of this reflective film, specifically, the weather-resistant layer 300 includes an upper functional layer 310, which is a polyester matrix used to achieve gradient refraction and weather resistance enhancement and to accommodate particles 311. The bottom of the upper functional layer 310 is connected to a support layer 320 by co-extrusion melt bonding. The support layer 320 is made of pure PET and is used to provide mechanical strength and dimensional stability. The bottom of the support layer 320 is connected to an isolation layer 330 by co-extrusion melt bonding. The isolation layer 330 is made of polyethylene and is used to improve the film's impermeability.

[0027] Furthermore, in order to protect the adhesive layer 400 from damage or contamination before use, the release layer 500 specifically includes a bottom layer 510, which is made of PET film and serves as a carrier. A coating 520 is fixedly connected to the bottom of the bottom layer 510. The coating 520 is specifically an organosilicon release agent, which provides a smooth and easy-to-peel surface.

[0028] It is worth noting that, in order to facilitate the control of optical fiber propagation, specifically, the upper functional layer 310 contains multiple particles 311. The material of particles 311 is rutile titanium dioxide, which is used to improve weather resistance and control light propagation. Particles 311 have an elliptical structure, which makes it easier for them to be oriented in the polymer melt, helping to form a more ordered optical path. Particles 311 are distributed in a gradient, specifically decreasing from top to bottom, in order to create a smoothly changing refractive index transition region.

[0029] Finally, to further enhance the hydrophobicity and response sensitivity of microcapsules 120, specifically, particles 110 have a spherical structure. The spherical structure rolls most effectively in the polymer matrix, forming a micro-nano-level rough structure. The random distribution ensures that the entire surface has uniform superhydrophobic properties without dead corners. Microcapsules 120 have an elongated oval structure, which improves the response sensitivity to external damage. Both particles 110 and microcapsules 120 are randomly distributed, ensuring that no matter where the damage occurs on the surface, there is a high probability that microcapsules are present nearby, enabling timely repair.

[0030] In addition, the circuits, electronic components and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated. The content protected by this utility model does not involve any improvement to the internal structure and method. Combination Figures 1-5 The weather-resistant reflective film of this embodiment is used in the following specific process: 1: Before using this type of weather-resistant reflective film, clean and dry the surface of the substrate, peel off the bottom release layer 500, align the exposed adhesive layer 400 with the installation position of the substrate and stick it, and then use a scraper or roller to apply pressure to ensure that it is flat, free of air bubbles and firmly bonded. 2: When exposed to rain and dust, the hydrophobic particles 110 in the anti-aging layer 100 on the surface of this weather-resistant reflective film will form a micro-nano structure on the surface, generating a "lotus leaf effect" that causes water droplets to form on the surface and roll off, automatically carrying away dust, achieving self-cleaning and keeping the markings clear. 3: Under continuous exposure to sunlight and high temperatures, the microcapsules 120 inside the anti-aging layer 100 will continuously or responsively release the anti-aging ingredients inside to repair the microscopic damage caused by ultraviolet rays. At the same time, the weather-resistant particles 2 in the upper functional layer 310 can effectively absorb and scatter ultraviolet rays, working together to achieve anti-aging and prevent yellowing and brittleness.

[0031] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A weather-resistant reflective film, characterized in that, It includes an anti-aging layer (100), a reflective layer (200) at the bottom of the anti-aging layer (100), a weather-resistant layer (300) at the bottom of the reflective layer (200), an adhesive layer (400) at the bottom of the weather-resistant layer (300), and a release layer (500) at the bottom of the adhesive layer (400).

2. The weather-resistant reflective film according to claim 1, characterized in that, The anti-aging layer (100) contains multiple particles (110) and multiple microcapsules (120).

3. The weather-resistant reflective film according to claim 2, characterized in that, The reflective layer (200) includes a reflector (210), which has a triangular structure.

4. The weather-resistant reflective film according to claim 3, characterized in that, The weather-resistant layer (300) includes an upper functional layer (310), a support layer (320) is fixedly connected to the bottom of the upper functional layer (310), and an isolation layer (330) is fixedly connected to the bottom of the support layer (320).

5. The weather-resistant reflective film according to claim 4, characterized in that, The release layer (500) includes a bottom layer (510), and a coating layer (520) is fixedly connected to the bottom of the bottom layer (510).

6. The weather-resistant reflective film according to claim 5, characterized in that, The upper functional layer (310) contains multiple particles (311), which are elliptical in shape and distributed in a gradient.

7. The weather-resistant reflective film according to claim 6, characterized in that, The particle (110) has a spherical structure, and the microcapsule (120) has an oblong structure. Both the particle (110) and the microcapsule (120) are randomly distributed.

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