Multifunctional reflective film

Abstract

The multifunctional reflective film comprises a base layer and a reflective layer, the reflective layer is arranged on the top face of the base layer, a fluorescent layer is arranged on the surface of the reflective layer, a light guide dam body is arranged on the surface of the fluorescent layer, a waterproof layer is arranged on the surface of the light guide dam body, the surface of the waterproof layer is coated with a diffuse reflection layer, and the bottom face of the base layer is coated with a pressure-sensitive adhesive layer. A release paper layer is arranged on the lower surface of the pressure-sensitive adhesive layer; the pressure-sensitive adhesive layer is prepared from the following materials in parts by weight: 10 to 20 parts of acrylic acid, 120 parts of acrylic acid-2-ethylhexyl ester, 40 parts of methyl acrylate, 0.5 part of azodiisobutyronitrile and 220 to 240 parts of ethyl acetate. By accurately regulating and controlling the ratio of the materials such as the acrylic monomers and the ethyl acetate, the excellent adhesion performance of the pressure-sensitive adhesive layer is ensured, the reflective film can be firmly adhered to different surfaces (such as metal, plastic and glass), heating or solvent use is not needed, and therefore the production cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of reflective materials, and more particularly to a multifunctional reflective film. Background Art

[0002] Reflective film is a material that can reflect or refract light, usually composed of multiple layers of reflective, refracting or diffuse reflective structures. Its core function is to enhance the reflection intensity of light so as to provide sufficient visibility in low-light or nighttime environments and improve the recognition and safety of objects. Reflective film is widely used in traffic signs, road safety signs, vehicle reflective stickers, clothing safety reflective strips, building exterior walls, billboards, and industrial equipment.

[0003] In low-light or dark environments, reflective film can enhance the visibility of objects by reflecting surrounding light sources (such as car lights), helping drivers or pedestrians to find the target object in time. By enhancing visibility, reflective film effectively reduces the incidence of traffic accidents at night, and is widely used in important facilities such as road signs, markings and emergency signs. Some special reflective films can not only reflect light, but also provide additional functions, such as waterproof, high temperature resistance, UV resistance, etc., to provide protection for applications in different environments.

[0004] Existing reflective films can be roughly divided into the following categories: The first type is glass bead reflective film, which usually contains evenly distributed glass microbeads. It uses the total reflection characteristics of glass beads to reflect light back to the direction of the light source through the glass beads. This film usually has a high reflectivity and is suitable for traffic signs and road safety facilities. The advantages of glass bead reflective film are simple structure, low manufacturing cost, and high reflective effect, but its reflective performance is more easily affected by wear and pollution, and its UV resistance and weather resistance are poor. The second type is micro-prismatic reflective film: This film uses tiny prism structures to refract and reflect light, and can usually provide uniform reflection effects over a large range. The characteristics of micro-prismatic film are that the reflected light is more concentrated, the brightness is higher, and it maintains good reflective performance when the angle of the light source changes. The manufacturing process of this type of reflective film is relatively complicated and the cost is high, but due to its excellent reflection effect, it is often used for high-precision or special occasions. Signs and reflective films. The third type of polymer reflective film: using special polymer materials, such as polyvinyl chloride (PVC) or polyester (PET), combined with reflective layer, fluorescent layer and light guide structure design to enhance the reflective effect of the film. This type of film can optimize the reflection and durability of the film through chemical and physical design, and is suitable for a wider range of applications. The characteristics of polymer film are good weather resistance and UV resistance, but its reflective effect and reflection angle control are sometimes not as good as glass bead film and micro prismatic film.

[0005] At present, the Chinese patent document with the publication number CN 109188584 A discloses a reflective film, wherein the upper surface of the base layer is covered with a first reflective layer, the upper surface of the base layer is covered with a fluorescent layer, the upper surface of the base layer is provided with a plurality of upwardly protruding light-guiding dams, and glass beads are embedded in the light-guiding dams; a cavity is formed between adjacent light-guiding dams; the two sides of the cavity have a first inclined surface and a second inclined surface opposite to each other, and the upper ends of the first inclined surface and the second inclined surface are inclined toward the adjacent light-guiding dam sides respectively; the first inclined surface is provided with a second reflective layer, and the second inclined surface is provided with a third reflective layer; the fluorescent layer below the cavity is provided with an upwardly protruding light-guiding portion; a waterproof layer is provided above the plurality of light-guiding dams, and the upper surface of the waterproof layer is covered with a diffuse reflection layer; the lower surface of the base layer is covered with a pressure-sensitive adhesive layer, and the lower surface of the base layer is covered with a release paper layer. It can still provide indication when the light is dim and the vehicle has no lights on.

[0006] However, the design of the pressure-sensitive adhesive layer and the release paper layer may affect the adhesion effect of the reflective film during use. The pressure-sensitive adhesive layer needs to have sufficient adhesion to ensure that the film can be firmly attached to the target surface, but it should not be too adhesive to avoid affecting the integrity of the film when peeling it off. And it only focuses on a single reflective effect and lacks other additional functions, such as fluorescence, anti-fouling, and anti-ultraviolet rays.

[0007] Although existing reflective film technologies have improved visibility and safety to a certain extent, they still have shortcomings in durability, reflective effect stability, versatility, manufacturing cost and adaptability. Therefore, it is urgent to develop a new type of reflective film that can maintain excellent reflective performance while having stronger durability, versatility and adaptability to meet the increasingly diverse market needs and requirements of different usage scenarios. Summary of the invention

[0008] In view of the shortcomings of the prior art, the object of the present invention is to provide a multifunctional reflective film, which has the advantages of good adhesion and anti-aging properties.

[0009] In order to achieve the above technical objectives, the present invention provides the following technical solutions: A multifunctional reflective film comprises a base layer and a reflective layer, wherein the reflective layer is arranged on the top surface of the base layer, a fluorescent layer is arranged on the surface of the reflective layer, a light guide dam is arranged on the surface of the fluorescent layer, a waterproof layer is arranged on the surface of the light guide dam, a diffuse reflection layer is coated on the surface of the waterproof layer, a pressure-sensitive adhesive layer is coated on the bottom surface of the base layer, and a release paper layer is arranged on the lower surface of the pressure-sensitive adhesive layer; the pressure-sensitive adhesive layer comprises the following materials in parts by weight: 10-20 parts of acrylic acid, 120 parts of 2-ethylhexyl acrylate, 40 parts of methyl acrylate, 0.5 parts of azobisisobutyronitrile, and 220-240 parts of ethyl acetate.

[0010] By adopting the above technical solution, by using acrylic acid, 2-ethylhexyl acrylate, and methyl acrylate, the pressure-sensitive adhesive layer can provide excellent adhesion performance, ensuring that the reflective film can be firmly adhered to the target surface without heating or using solvents. This allows the film to obtain a stable adhesion effect on various surfaces (such as metal, plastic, glass, etc.). The formula of the pressure-sensitive adhesive layer (acrylic acid, 2-ethylhexyl acrylate, methyl acrylate, etc.) meets environmental protection requirements, can reduce the release of harmful substances, and does not require additional heat sources or solvents, making it more environmentally friendly to use. The multilayer structure of the present invention reduces the need for other additional materials and reduces production costs by reasonably configuring different functional layers. The specific formula of the pressure-sensitive adhesive layer enables the reflective film to be quickly adhered to various substrates, thereby improving production efficiency.

[0011] Further preferably, the weight parts of the pressure-sensitive adhesive layer material are: 15 parts of acrylic acid, 120 parts of 2-ethylhexyl acrylate, 40 parts of methyl acrylate, 0.5 parts of azobisisobutyronitrile, and 230 parts of ethyl acetate.

[0012] Further preferably, the method for preparing the pressure-sensitive adhesive layer comprises the following steps: S1: Add ethyl acetate, 2-ethylhexyl acrylate, methyl acrylate, acrylic acid and azobisisobutyronitrile into a flask, adjust the temperature to 85°C-87°C, and stir to react for 20 minutes; S2: Keep the temperature for 6 hours, and after the temperature drops to 50°C, evenly add ethyl acetate to the reaction system, continue stirring, and keep the temperature for 1.5 hours after the addition is completed to obtain a pressure-sensitive adhesive solution; S3: Apply the pressure-sensitive adhesive solution to the bottom surface of the base layer and dry it in an oven for 10 minutes to obtain a pressure-sensitive adhesive layer.

[0013] By adopting the above technical scheme, during the reaction process, the precise control of temperature and the setting of reaction time are helpful to ensure the full reaction of acrylic monomers, so that the molecular structure of the pressure-sensitive adhesive layer is more uniform, and its adhesion performance and weather resistance are enhanced. Through the process of heat preservation and condensation for 6 hours and dripping ethyl acetate into the reaction system, the viscosity and fluidity of the pressure-sensitive adhesive can be further adjusted to ensure the uniformity of the adhesive solution, avoid the material from being too viscous or uneven, and thus improve the quality of the pressure-sensitive adhesive layer. Long-term stirring and condensation are helpful for the cross-linking between molecules in the adhesive solution, so that the adhesive layer has good stability and strength, prolongs the service life of the reflective film, and can maintain strong adhesion, and will not fall off or age even in extreme environments. In the process of dripping ethyl acetate, the uniformity and fluidity of the adhesive solution are ensured, which is helpful for the coating effect of the adhesive layer, so that the final pressure-sensitive adhesive layer has better adhesion, and at the same time ensures the wear resistance and anti-aging performance of the pressure-sensitive adhesive layer. The steps of the preparation method are concise and clear, and high-quality pressure-sensitive adhesive solution can be quickly obtained, and an ideal adhesive layer can be obtained through a simple coating and drying process, reducing the complexity and time in the production process.

[0014] Further preferably, a UV protection layer is provided between the light guide dam and the waterproof layer.

[0015] By adopting the above technical solution, the UV protection layer can effectively block the intrusion of ultraviolet rays and prevent the potential destructive effect of ultraviolet rays on the light-guiding dam, the reflective layer and other layers. Ultraviolet rays can cause material aging, fading and even functional degradation. By setting up a UV protection layer, the service life of the reflective film can be significantly extended and the material degradation caused by ultraviolet rays can be reduced. The UV protection layer not only protects the external surface of the light-guiding dam, but also indirectly protects other functional layers in the film, ensuring that they can still maintain good reflective effects and functions when exposed to sunlight for a long time.

[0016] Further preferably, the UV protection layer comprises the following materials in parts by weight: 0.5-5 parts of ultraviolet absorber, 0.3-3 parts of ultraviolet stabilizer, 10-40 parts of epoxy resin, and 0.1-3 parts of benzothiazole compound.

[0017] By adopting the above technical scheme, the UV absorber can effectively absorb and convert UV radiation, prevent UV rays from directly irradiating the inner layer of the film, reduce UV damage to the film, and extend the service life of the film. By adjusting the content of the UV absorber, it is possible to ensure effective protection while avoiding unnecessary costs caused by excessive use. The UV absorber and UV stabilizer work together to significantly enhance the UV protection ability of the film material and reduce the impact of UV rays on the performance of the reflective film (such as reflectivity, transparency, etc.). The UV stabilizer can further improve the UV resistance of the film material on the basis of the UV absorber and slow down the chemical degradation caused by UV irradiation. The UV stabilizer effectively extends the service life of the reflective film by slowing down the free radical reaction caused by UV rays, and is particularly suitable for outdoor applications or long-term exposure to strong UV environments. The synergistic effect of the UV stabilizer and the UV absorber can significantly improve the anti-aging property of the UV protective layer, prevent UV rays from causing embrittlement, fading or strength reduction of the film material, and ensure that the film is in the best performance state for a long time. Epoxy resin is the main structural material, which can improve the mechanical strength and wear resistance of the UV protective layer. Epoxy resin not only enhances the hardness and toughness of the UV protection layer, but also improves the scratch resistance of the film layer, ensuring the durability of the film in complex environments. Epoxy resin can improve the film's resistance to environmental factors such as moisture and temperature changes, so that the film can still maintain good performance and stability in humid, cold or hot environments. Benzothiazole compounds are light stabilizers that can improve the optical stability of film materials, especially in strong ultraviolet and high temperature environments. Benzothiazole compounds absorb and prevent the penetration of harmful ultraviolet rays, effectively reducing light decay. Its addition not only improves the optical properties of the UV protection layer, but also further increases the visibility and brightness of the film material. Benzothiazole compounds reduce the color fading and performance degradation of the film surface by inhibiting the impact of ultraviolet rays on the film material, so that the reflective film can still maintain a brighter color and good reflective performance even if it is exposed to sunlight for a long time.

[0018] More preferably, the UV protective layer material comprises: 2 parts of ultraviolet absorber, 1.5 parts of ultraviolet stabilizer, 25 parts of epoxy resin, and 1 part of benzothiazole compound.

[0019] More preferably, the anti-sticking paper layer is silicone oil paper or polytetrafluoroethylene (PTFE) coated paper.

[0020] By adopting the above technical solution, the silicone oil paper has excellent anti-adhesive properties, and its surface is coated with silicone oil, which can effectively prevent the pressure-sensitive adhesive layer from adhering to other objects during storage, transportation or operation, ensuring that the reflective film is in good condition before use. The anti-adhesive effect of the silicone oil paper can be maintained for a long time, and it can be easily peeled off when used, avoiding damage to the pressure-sensitive adhesive layer during the peeling process. The surface coating of polytetrafluoroethylene (PTFE) coated paper has extremely strong anti-adhesive properties. PTFE is a non-adhesive material, and its surface hardly adheres to other substances. Therefore, PTFE coated paper can further ensure that the surface of the film and the anti-adhesive paper layer are effectively isolated, avoiding damage or contamination of the pressure-sensitive adhesive layer. During the storage and transportation of the reflective film, the addition of the anti-adhesive paper layer can effectively prevent the pressure-sensitive adhesive layer of the film from adhering to other objects, avoiding deformation of the film or adhesion to surfaces that should not be contacted. Both silicone oil paper and PTFE coated paper have good isolation effects, and can maintain the integrity and usability of the film during long-term storage. The excellent performance of release paper can prevent the adhesive layer from being contaminated by external factors such as dust, oil, moisture, etc. during transportation or storage, ensuring that the adhesive layer of the film will not be contaminated during use, thereby improving the use effect of the film. During the peeling process, due to the low friction coefficient of silicone oil paper or PTFE coated paper, they can effectively reduce the friction on the pressure-sensitive adhesive layer of the film, thereby avoiding tearing or falling off of the adhesive layer, ensuring that the film has good performance when adhering to the target surface.

[0021] More preferably, the base layer is a fluorinated polymer.

[0022] By adopting the above technical solutions, fluorinated polymers have extremely strong resistance to UV rays and oxidation, and can effectively delay the aging process of the material. The chemical structure of fluorinated polymers has strong stability, which makes the reflective film not easy to age or fade when exposed to ultraviolet rays, high temperature and oxygen. Selecting fluorinated polymers as the base layer can improve the film's resistance to UV aging, so that it can still maintain a good reflective effect and appearance during long-term use. Fluorinated polymer materials have strong tensile strength, toughness and wear resistance in the form of thin films, and can withstand certain mechanical stress or external forces without being easily broken or deformed. Using fluorinated polymers as the base layer can make the reflective film show better wear resistance and strength during the application process, especially when used in high-friction and easy-to-wear occasions, fluorinated polymers can effectively prevent damage to the film.

[0023] Further preferably, the bottom surface of the base layer is subjected to corona treatment.

[0024] By adopting the above technical solution, corona treatment is a surface treatment technology that excites the surface of the base material through high-energy electrons generated by corona discharge to form polar groups, which can significantly improve the activity and polarity of the base surface and increase the adhesion between the base and the subsequent coating layer. This can ensure the close bonding between the layers and avoid shedding or peeling during use.

[0025] In summary, the present invention has the following beneficial effects: The present invention ensures the excellent adhesion performance of the pressure-sensitive adhesive layer by precisely controlling the ratio of acrylic monomers, ethyl acetate and other materials, so that the reflective film can be firmly adhered to different surfaces (such as metal, plastic, glass, etc.) without heating or using solvents, thereby reducing production costs and improving production efficiency. Corona treatment improves the adhesion of the base surface, and the fluorinated polymer material has excellent UV resistance, oxidation resistance, wear resistance and other properties, which enhances the weather resistance and mechanical strength of the reflective film. The strengthening measures of the base ensure that the reflective film can be stably attached to the target surface for a long time and is not easy to age, fade or damage in harsh environments.

[0026] The present invention can effectively block the invasion of ultraviolet rays by arranging a UV protection layer between the light-guiding dam body and the waterproof layer, and avoid potential damage of ultraviolet rays to the reflective layer of the film, the light-guiding dam body and other inner layers. The synergistic effect of the ultraviolet absorber, stabilizer and benzothiazole compound in this layer enables the reflective film to maintain good reflective performance and structural stability when exposed to sunlight or other ultraviolet sources for a long time, significantly prolonging the service life of the film and improving its anti-aging performance. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below with reference to the embodiments.

[0028] Example 1: A pressure-sensitive adhesive layer, including components and their corresponding weight parts as shown in Table 1, is prepared by the following steps: S1: Add ethyl acetate, 2-ethylhexyl acrylate, methyl acrylate, acrylic acid and azobisisobutyronitrile into a flask, adjust the temperature to 85°C-87°C, and stir to react for 20 minutes; S2: Keep the temperature for 6 hours, and after the temperature drops to 50°C, evenly add ethyl acetate to the reaction system, continue stirring, and keep the temperature for 1.5 hours after the addition is completed to obtain a pressure-sensitive adhesive solution; S3: Apply the pressure-sensitive adhesive solution to the bottom surface of the base layer and dry it in an oven for 10 minutes to obtain a pressure-sensitive adhesive layer.

[0029] Table 1 Pressure-sensitive adhesive layer raw materials weight parts Embodiment 2: The pressure-sensitive adhesive layer is different from Embodiment 1 in that the weight portion of acrylic acid is 10 parts.

[0030] Embodiment 3: The pressure-sensitive adhesive layer is different from Embodiment 1 in that the weight portion of acrylic acid is 20 parts.

[0031] Embodiment 4: The pressure-sensitive adhesive layer is different from Embodiment 1 in that the weight portion of ethyl acetate is 220 parts.

[0032] Embodiment 5: The pressure-sensitive adhesive layer is different from Embodiment 1 in that the weight portion of ethyl acetate is 240 parts.

[0033] Example 6: UV protective layer, including components and their corresponding weight parts as shown in Table 2.

[0034] Table 2 UV protection layer raw materials weight parts list Embodiment 7: UV protection layer, which is different from Embodiment 6 in that the weight portion of the ultraviolet absorber is 0.5 parts.

[0035] Embodiment 8: UV protection layer, which is different from Embodiment 6 in that the weight portion of the ultraviolet absorber is 5 parts.

[0036] Embodiment 9: UV protection layer, which is different from Embodiment 6 in that the weight portion of the ultraviolet stabilizer is 0.3 parts.

[0037] Embodiment 10: UV protection layer, which is different from Embodiment 6 in that the weight portion of the ultraviolet stabilizer is 3 parts.

[0038] Embodiment 11: UV protection layer, which is different from Embodiment 6 in that the weight portion of epoxy resin is 10.

[0039] Embodiment 12: UV protection layer, which is different from Embodiment 6 in that the weight portion of epoxy resin is 40.

[0040] Embodiment 13: UV protection layer, which is different from Embodiment 6 in that the weight portion of the benzothiazole compound is 0.1.

[0041] Embodiment 14: UV protection layer, which is different from Embodiment 6 in that the weight portion of the benzothiazole compound is 3.

[0042] Preparation Example 1: A multifunctional reflective film, comprising a base layer, a reflective layer, a fluorescent layer, a light-guiding dam, a waterproof layer, a diffuse reflection layer, a pressure-sensitive adhesive layer, a release paper layer, and a UV protection layer, wherein the release paper layer is silicone oil paper.

[0043] Preparation Example 2: A multifunctional reflective film, which is different from Preparation Example 1 in that the anti-sticking paper layer is polytetrafluoroethylene (PTFE) coated paper.

[0044] Comparative Example: The multifunctional reflective film is different from Preparation Example 1 in that it does not include a UV protection layer.

[0045] 1. Adhesion performance GB / T 2792-2008 Table 3-Adhesion performance test table In combination with Table 3 and Examples 1-3, it can be seen that increasing the content of acrylic acid usually increases the adhesion of the pressure-sensitive adhesive layer. Acrylic acid is a monomer with good hydrophilicity, which can enhance the adhesion of the adhesive layer to various surfaces (such as metal, plastic, glass, etc.). The polar groups of acrylic acid can form a strong interaction with the target surface, thereby improving the adhesion of the film layer. However, too high an acrylic acid content may cause the adhesive layer to be too viscous, thereby affecting the coating process, or cause excessive adhesion, affecting the peelability of the film in the later stage.

[0046] Combining Example 1 and Examples 4-5, it can be seen that as the ethyl acetate content increases, the tensile shear strength of the pressure-sensitive adhesive layer gradually increases. This is because ethyl acetate helps to adjust the viscosity and fluidity of the adhesive layer, making the adhesive layer more uniform, thereby enhancing its shear resistance. When the ethyl acetate content is low, the adhesive layer is more likely to undergo brittle fracture, indicating that its toughness is insufficient; and as the ethyl acetate content increases to 230 or 240 parts, the fracture mode tends to ductile fracture, which indicates that the adhesive layer has better ductility and toughness, and can withstand greater stress during the stretching process without being easily broken.

[0047] 2. Anti-aging performance GB / T 23997-2009 Table 4- Anti-aging performance test table Combined with Table 4, and in combination with Examples 6, 7-8, it can be seen that the increase of ultraviolet absorbers helps to improve the film's resistance to ultraviolet aging and extend the service life of the film material. The addition of ultraviolet stabilizers, especially at high levels, can significantly slow down the damage of ultraviolet rays to the protective layer, enhance the weather resistance of the film, and prevent color difference changes and performance degradation. Ultraviolet absorbers can absorb ultraviolet light and convert it into heat or other harmless forms of energy. In this way, ultraviolet rays will not directly enter the film material, thereby avoiding the chemical and physical damage of ultraviolet rays to the material. When ultraviolet rays irradiate the film material, free radicals in the molecules are usually triggered. These free radicals can destroy the polymer chain structure of the material and cause the degradation of the material. The ultraviolet absorber can absorb ultraviolet rays and consume some free radicals, inhibit the generation of free radicals, and reduce damage to the film material.

[0048] In conjunction with Example 6, and in conjunction with Examples 9-10, it can be seen that the addition of UV stabilizers helps reduce the color change of the material, making it more stable and adaptable to the environment of UV irradiation. The tensile strength and elongation decrease slightly after the addition of stabilizers, which is related to the way the stabilizers are dispersed in the plastic and the mechanism of action, but these changes are small. UV stabilizers play an important role in reducing the aging effects caused by UV rays, especially in reducing color changes.

[0049] In combination with Example 6, and in combination with Examples 11-12, it can be seen that as the amount of epoxy resin added increases, the tensile strength gradually decreases. This is because the role of epoxy resin in plastic increases the rigidity of the material, although it enhances certain mechanical properties, but reduces the endurance of the material during stretching. The increase in epoxy resin content causes a slight decrease in the elongation of the material. This shows that epoxy resin makes the material more rigid and brittle, reducing the elasticity and ductility of the plastic.

[0050] In combination with Example 6, and in combination with Examples 13-14, it can be seen that as the amount of benzothiazole compounds added increases, the tensile strength gradually decreases. It may be because the addition of the compound changes the molecular structure of the material, making it more stable under ultraviolet radiation. Although the tensile strength decreases slightly, the overall UV resistance of the material is improved. The elongation decreases slightly with the increase of the content of the benzothiazole compounds, which shows that the addition of the benzothiazole compounds makes the material slightly rigid and the ductility is weakened.

[0051] Combining Example 6 and the comparative example, it can be seen that when the UV protective layer is not added, ultraviolet rays will accelerate the aging process of the material, resulting in a decrease in physical properties.

[0052] 3. Anti-stick performance Table 5 - Multifunctional reflective film anti-sticking performance test table Combined with Table 5 and Preparation Examples 1-2, it can be seen that, numerically, the peeling force of the PTFE-coated paper is slightly higher. This is because the density and physical properties of the PTFE coating give it stronger adhesion, especially in a high temperature environment.

[0053] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A multifunctional reflective film, comprising a base layer and a reflective layer, wherein the reflective layer is arranged on the top surface of the base layer, a fluorescent layer is arranged on the surface of the reflective layer, a light guide dam is arranged on the surface of the fluorescent layer, a waterproof layer is arranged on the surface of the light guide dam, and a diffuse reflection layer is coated on the surface of the waterproof layer, characterized in that: The bottom surface of the base layer is coated with a pressure-sensitive adhesive layer, and the lower surface of the pressure-sensitive adhesive layer is provided with a release paper layer; the pressure-sensitive adhesive layer comprises the following materials in parts by weight: 10-20 parts of acrylic acid, 120 parts of 2-ethylhexyl acrylate, 40 parts of methyl acrylate, 0.5 parts of azobisisobutyronitrile, and 220-240 parts of ethyl acetate.

2. The multifunctional reflective film according to claim 1, characterized in that: The weight parts of the pressure-sensitive adhesive layer material are: 15 parts of acrylic acid, 120 parts of 2-ethylhexyl acrylate, 40 parts of methyl acrylate, 0.5 parts of azobisisobutyronitrile, and 230 parts of ethyl acetate.

3. The multifunctional reflective film according to claim 2, characterized in that: The method for preparing the pressure-sensitive adhesive layer comprises the following steps: S1: Add ethyl acetate, 2-ethylhexyl acrylate, methyl acrylate, acrylic acid and azobisisobutyronitrile into a flask, adjust the temperature to 85°C-87°C, and stir to react for 20 minutes; S2: Keep the temperature for 6 hours, and after the temperature drops to 50°C, evenly add ethyl acetate to the reaction system, continue stirring, and keep the temperature for 1.5 hours after the addition is completed to obtain a pressure-sensitive adhesive solution; S3: Apply the pressure-sensitive adhesive solution to the bottom surface of the base layer and dry it in an oven for 10 minutes to obtain a pressure-sensitive adhesive layer.

4. The multifunctional reflective film according to claim 1, characterized in that: A UV protection layer is arranged between the light-guiding dam and the waterproof layer.

5. The multifunctional reflective film according to claim 4, characterized in that: The UV protection layer comprises the following materials in parts by weight: 0.5-5 parts of ultraviolet absorber, 0.3-3 parts of ultraviolet stabilizer, 10-40 parts of epoxy resin, and 0.1-3 parts of benzothiazole compound.

6. The multifunctional reflective film according to claim 5, characterized in that: The weight parts of the UV protection layer materials are: 2 parts of ultraviolet absorber, 1.5 parts of ultraviolet stabilizer, 25 parts of epoxy resin and 1 part of benzothiazole compound.

7. The multifunctional reflective film according to claim 1, characterized in that: The anti-sticking paper layer is silicone oil paper or polytetrafluoroethylene (PTFE) coated paper.

8. The multifunctional reflective film according to claim 1, characterized in that: The base layer is a fluorinated polymer.

9. The multifunctional reflective film according to claim 8, characterized in that: The bottom surface of the base layer is subjected to corona treatment.