Multi-layer composite coating process based on scratch-resistant wear-resistant reflective film

Abstract

The invention relates to the technical field of reflective film production and processing, and discloses a multi-layer composite coating process based on a scratch-resistant wear-resistant reflective film, which comprises the following steps: S1, material preparation: the composite material comprises a base material, a reflective material and an adhesive; s2, coating a scratch-resistant and wear-resistant layer: firstly coating a layer of adhesive on the base material, then uniformly coating the adhesive on the base material by adopting a spray coating mode, and then bonding the scratch-resistant and wear-resistant layer with the base material; s4, preparing a composite material; S5, coating an adhesive layer; S6, drying and curing for the second time; and S7, slitting and packaging. The base material and the reflective material are compounded through a hot-pressing compound machine, so that the surface of the reflective film has higher scratch resistance and wear resistance, the service life is prolonged, all the layers can be firmly bonded and are not easy to separate through the adhesive, the stability of the composite structure is ensured, and the reflective film is not easy to deform when subjected to conditions such as vibration, impact or temperature change. And the effect of the joint part of each layer can still be maintained.

Description

Technical Field

[0001] The invention relates to the technical field of production and processing of reflective films, and in particular to a multi-layer composite coating process based on scratch-resistant and wear-resistant reflective films. Background Art

[0002] Reflective film is a material that reflects light, usually made of tiny reflective beads or mirror structures. It is often used in road markings, traffic signs, building exteriors, etc. to help improve visibility and safety. Reflective film can enhance the visibility of objects in low light conditions, and the composite coating process improves the durability of the film while maintaining excellent reflective properties.

[0003] However, when some reflective films are produced, in order to ensure the high brightness of the reflective film, the reflective material is usually attached to the outer layer. Without the protection of the protective layer, when encountering scratches or bumps, the reflective material will be deformed and fall off, resulting in a deterioration of the reflective effect. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a multi-layer composite coating process based on anti-scratch and wear-resistant reflective film, which solves the problem that when there is no protection of a protective layer, the reflective material will be deformed and fall off when encountering scratches or bumps, resulting in a deterioration of the reflective effect.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a multi-layer composite coating process based on anti-scratch and wear-resistant reflective film, comprising the following steps:

[0006] S1. Prepare materials: prepare materials to be coated and compounded, wherein the compounded materials include a substrate, a reflective material and an adhesive;

[0007] S2. Coating the anti-scratch and wear-resistant layer: firstly, coating a layer of adhesive on the substrate, and then using a spray coating method to evenly coat the adhesive on the substrate, and then bonding the anti-scratch and wear-resistant layer to the substrate;

[0008] S3, first drying and curing: the substrates coated with the primer are neatly stacked and placed in the drying area, and the conveyor is started to convey them into the drying box for drying so that the primer forms a solid coating, and then the solvent in the primer is removed to cure it, ensuring that the primer is completely dry;

[0009] S4, composite material: compound the dried substrate with the reflective material, select the material to be compounded, ensure that its surface is clean, flat, free of oil and impurities, stack the materials to be compounded neatly in a predetermined order, put the stacked materials into the working area of ​​the hot press, start the hot press, heat the materials through the heating plate, and apply the set pressure at the same time. After reaching the set hot pressing time, keep the pressure unchanged, let the material gradually cool under pressure, and after cooling to a suitable temperature, release the pressure and take out the compounded material. The hot pressing equipment includes a hot pressing compounding machine;

[0010] S5, coating adhesive layer: first clean the surface of the coated substrate to remove dust, oil stains and impurities to ensure a good bonding effect, then put it into the coating area, and then evenly spray the coating adhesive on the surface of the coated base for bonding, the coating adhesive layer includes polyurethane adhesive or epoxy adhesive;

[0011] S6, Second drying and curing: During the production process of coil coating, a long-channel hot air oven is used to allow the coated coil to pass through it at a uniform speed to achieve uniform drying;

[0012] S7. Slitting and packaging: Use slitting equipment to cut wide reflective film rolls into sheets or rolls of specific width and length, and then bundle and stack them for storage after cutting into the required size and shape.

[0013] Preferably, in S1, the thickness of the substrate is: 50-200 microns of polyester film or 100-300 microns of polycarbonate, the thickness of the reflective material is: 100-500 microns of reflective coating or 150-500 microns of microprismatic reflective material, and the proportion of the adhesive is: 10-30% of acrylic adhesive or 10-30% of polyurethane adhesive.

[0014] Preferably, in S2, during the spray coating, the spray pressure is 1-10 MPa, the conveying speed is 1-8 m / min, and the spray height is 10-30 cm.

[0015] Preferably, in S3, the speed of the drying oven is between 0.5-5 m / min, the humidity of the drying oven is between 10%-30%, and the temperature of the drying oven is between 50-200°C.

[0016] Preferably, in S4, the preheating temperature of the hot pressing equipment is 80°C-200°C, the hot pressing pressure is 5MPa-30MPa, and the hot pressing time is 10 seconds-60 minutes.

[0017] Preferably, in S5, the thickness of the adhesive layer is 5-15 microns for polyurethane adhesive or 5-15 microns for epoxy adhesive.

[0018] Preferably, in S6, the temperature of the hot air oven is 50°C-300°C, and the wind speed of the hot air oven is 0.5m / s-5m / s.

[0019] Preferably, in S7, the slitting equipment includes a CNC reflective film slitting machine or a knife-type slitting machine.

[0020] The present invention provides a multi-layer composite coating process based on a scratch-resistant and wear-resistant reflective film. It has the following beneficial effects:

[0021] 1. After the materials are prepared, the present invention uses a hot pressing laminating machine to perform a laminating treatment on the substrate and the reflective material, so that the surface of the reflective film has stronger scratch resistance and wear resistance, can maintain a good appearance and reflective effect under long-term use and various environmental conditions, and prolongs the service life. The acrylic adhesive or the pressure-sensitive adhesive allows the layers to be firmly bonded and not easily separated, ensuring the stability of the composite structure. When subjected to vibration, impact or temperature changes, the effect of the joints of the layers can still be maintained.

[0022] 2. The present invention can make the thickness through the drying oven, which helps the solvent in the coating to fully volatilize, can ensure that each layer of coating is evenly dried, make the bonding between the layers more firm, and improve the overall performance of the reflective film. In addition, in the test, the moisture in the coating can be further volatilized, further increasing the connection between the films to make them more firmly and not easy to separate. The hot air oven is used to accelerate the volatilization rate of the solvent in the coating and the curing process of the coating. For coatings containing high molecular polymers, high temperature can promote the cross-linking and crystallization of polymer molecular chains, thereby improving the hardness and wear resistance of the coating.

[0023] 3. The present invention can reduce costs without reducing performance by compounding multiple materials by selecting materials with lower prices but complementary properties. In experiments, polyester film or polycarbonate has good flatness and transparency. After being compounded with reflective coatings or micro-prismatic reflective materials, it can reduce the scattering and absorption of light, making the reflective effect more significant and clear. These two substrates have good processing properties and are easy to be compounded with reflective materials, such as coating or lamination, to improve production efficiency and consistency of product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Embodiment 1:

[0027] The embodiment of the present invention provides a multi-layer composite coating process based on a scratch-resistant and wear-resistant reflective film, comprising the following steps:

[0028] S1. Prepare materials: prepare the materials to be coated and laminated, the laminated materials include substrate, reflective material and adhesive;

[0029] S2. Coating the anti-scratch and wear-resistant layer: firstly, coating a layer of adhesive on the substrate, and then using a spray coating method to evenly coat the adhesive on the substrate, and then bonding the anti-scratch and wear-resistant layer to the substrate;

[0030] S3, first drying and curing: the substrates coated with the primer are neatly stacked and placed in the drying area, and the conveyor is started to convey them into the drying box for drying so that the primer forms a solid coating, and then the solvent in the primer is removed to cure it, ensuring that the primer is completely dry;

[0031] S4, composite material: compound the dried substrate with the reflective material, select the material to be compounded, ensure that its surface is clean, flat, free of oil and impurities, stack the materials to be compounded neatly in a predetermined order, put the stacked materials into the working area of ​​the hot press, start the hot press, heat the materials through the heating plate, and apply the set pressure at the same time. After reaching the set hot pressing time, keep the pressure unchanged, let the material gradually cool under pressure, and after cooling to a suitable temperature, release the pressure and take out the compounded material. The hot pressing equipment includes a hot pressing compounding machine;

[0032] S5, coating adhesive layer: first clean the surface of the coated substrate to remove dust, oil stains and impurities to ensure a good bonding effect, then put it into the coating area, and then evenly spray the coating adhesive on the surface of the coated base for bonding, the coating adhesive layer includes polyurethane adhesive or epoxy adhesive;

[0033] S6, Second drying and curing: During the production process of coil coating, a long-channel hot air oven is used to allow the coated coil to pass through it at a uniform speed to achieve uniform drying;

[0034] S7. Slitting and packaging: Use slitting equipment to cut wide reflective film rolls into sheets or rolls of specific width and length, and then bundle and stack them for storage after cutting into the required size and shape.

[0035] In S1, the thickness of the substrate is: polyester film 50 microns, the thickness of the reflective material is: reflective coating 100 microns, and the proportion of the adhesive is: acrylic adhesive 10%.

[0036] Polyester film: It has high tensile strength, rigidity and toughness, excellent electrical insulation performance, and is a commonly used material in the field of electrical insulation. It can resist corrosion from a variety of chemical substances, has small dimensional changes under different temperature and humidity conditions, has high transparency, and has a high transmittance to visible light. After lamination, it does not affect the transparency of the film.

[0037] Reflective coating: It has high reflective properties and can reflect a large amount of incident light, making it significantly visible in a dark environment. It has good weather resistance, abrasion resistance and chemical corrosion resistance, and can maintain the reflective effect for a long time. It has strong adhesion and can be firmly attached to various substrate surfaces, including metal, plastic, and wood. It dries quickly, which helps to improve construction efficiency.

[0038] Acrylic adhesives: Acrylic adhesives have strong adhesion, weather resistance, and clear drying to maintain a good gloss. They dry quickly, are suitable for a variety of substrates, and are excellent in water and chemical resistance.

[0039] In S2, during the spray coating, the spray pressure was 1 MPa, the conveying speed was 1 m / min, and the spray height was 10 cm.

[0040] Spray coating is a coating technology that applies the coating liquid evenly to the surface of the substrate by spraying. It can achieve relatively uniform coating on the surface of complex-shaped substrates and is suitable for small areas and irregular surfaces. For some small areas, uneven or shaped surfaces that are difficult to handle with traditional coating methods, spray coating has unique advantages and strong adjustability. The thickness and uniformity of the coating can be controlled by adjusting parameters such as spray pressure, flow rate, and spray angle. In the experiment, the spray pressure was 1MPa, the delivery speed was 1m / min, and the nozzle height was 10cm. Even if the surface shape is irregular, spray coating can ensure uniform coverage of the coating and improve product performance and quality.

[0041] In S3, the speed of the drying oven is 0.5 m / min, the humidity of the drying oven is 10%, and the temperature of the drying oven is 50°C.

[0042] The drying box can accurately set and control the internal temperature to meet the drying requirements of different materials, prevent external moisture from entering, ensure the drying effect, keep the temperature of each part of the box relatively consistent, ensure that the material is heated evenly, to meet the drying needs of different scales. During the experiment, when the speed of the drying box was between 0.5 m / min, the humidity of the drying box was 10%, and the temperature of the drying box was 50°C, the drying efficiency of the adhesive in the coating was accelerated by 60%.

[0043] In S4, the preheating temperature of the hot pressing equipment is 80°C, the hot pressing pressure is 5 MPa, and the hot pressing time is 10 seconds.

[0044] Hot pressing equipment can accurately set and adjust the temperature within a wide temperature range to meet the needs of different materials and processes. It can set and adjust the applied pressure according to specific processing requirements, such as electric heating, oil heating or steam heating, etc., to ensure rapid and uniform temperature rise, and can withstand high temperature and high pressure environments to ensure long-term stable operation of the equipment.

[0045] In S5, the thickness of the adhesive layer is 5 μm of polyurethane adhesive.

[0046] Polyurethane adhesives have high bonding strength and can form strong connections between various materials. They have good tolerance to temperature, humidity and ultraviolet rays, so they can maintain performance outdoors and in harsh environments. The dried adhesive usually has a certain degree of flexibility and can absorb stress and deformation between materials. It has good tolerance to a variety of chemicals, including solvents, greases, acids and alkalis, and the 5-micron thickness of the polyurethane adhesive will not affect light transmittance.

[0047] In S6, the temperature of the hot air oven is 50°C, and the wind speed of the hot air oven is 0.5 m / s.

[0048] When the temperature of the hot air oven is set to a relatively low temperature of 50°C, it can avoid high temperature damage to the performance, composition or structure of the material, such as the loss of certain volatile components, denaturation of heat-sensitive substances, and uniform drying. The wind speed of 0.5m / s helps the hot air to be evenly distributed in the oven, so that all parts of the material can be heated evenly, thereby ensuring the consistency of drying and reducing the situation of insufficient or excessive local drying. The combination of lower temperature and moderate wind speed can achieve a slower and gentler drying process, which is very important for materials that require precise control of the drying rate and final moisture content, and helps to obtain a more ideal drying effect and product quality protection material characteristics. This condition can achieve drying while retaining its original characteristics to the greatest extent.

[0049] In S7, the slitting equipment includes a CNC reflective film slitting machine.

[0050] The CNC reflective film slitting machine has high-precision slitting. Through the CNC system, the movement and cutting action of the tool are precisely controlled to achieve high-precision slitting, ensuring that the reflective film after slitting has accurate size and neat edges. The operator only needs to input relevant parameters in the CNC system, such as slitting width, length, quantity, etc., and the machine can automatically complete the slitting task, which greatly improves production efficiency and reduces the error of manual operation. It has strong flexibility and can quickly adjust the slitting parameters according to different production needs. It is suitable for slitting reflective films of various specifications and shapes. The CNC reflective film slitting machine is widely used in the production and processing of reflective films in the fields of road traffic reflective signs, advertising reflective materials, personal protective reflective products, etc. The CNC reflective film slitting machine can quickly and accurately cut a wide width of reflective film into strips or sheets that meet the standards, which are used to make road markings and traffic signs, and improve the visibility and warning effect of road traffic safety facilities.

[0051] Compared with the first embodiment, the second embodiment is different in the following steps:

[0052] In S1, the thickness of the substrate is: 300 microns of polycarbonate, the thickness of the reflective material is: 500 microns of microprismatic reflective material, and the proportion of the adhesive is: 30% of polyurethane adhesive.

[0053] Polycarbonate has many excellent properties. In the experiment, 300 micron polycarbonate was used. It has excellent strength and high hardness. It can withstand large external impacts without breaking easily. During the test, the reflective film is more scratch-resistant and wear-resistant, and will not be deformed due to impact and shock.

[0054] Microprismatic reflective material 500 microns, the core of microprismatic reflective material lies in its tiny and precise prism structure. These microprisms are usually arranged in a regular array, which can accurately control the reflection direction and intensity of light. Microprismatic reflective material has many significant advantages. Its reflective efficiency is extremely high, and it can reflect most of the incident light back with strong brightness. In the experiment, it was used in road signs and markings. Even in dim light, it can clearly indicate the road conditions, greatly improving traffic safety. It also has good wide-angle performance and can maintain excellent reflective effects when observed from different angles. Microprismatic reflective material has good durability and can withstand long-term outdoor exposure, wind and rain erosion and vehicle friction.

[0055] Polyurethane adhesive accounts for 30% of the content in the experiment. Adhesives with polyurethane components have many unique properties and application characteristics. First of all, it has good bonding strength and can firmly connect various materials. It can bond different substrates tightly together to form a solid structure. Its flexibility is also a major advantage. It can adapt to the deformation and vibration of the bonded materials during use. It also has certain water resistance and chemical corrosion resistance than polyurethane adhesives.

[0056] In S2, during the spray coating, the spray pressure was 10 MPa, the conveying speed was 8 m / min, and the spray height was 30 cm.

[0057] In the experiment of mist coating, when the spray pressure is 10MPa, the conveying speed is 8m / min, and the spray height is 30cm, first, the spray pressure of 10MPa can ensure that the paint is fully atomized to form small and uniform droplets, which helps the paint to cover the coating surface more evenly, reduce the thickness difference of the coating, and improve the coating quality. The conveying speed of 8m / min can ensure production efficiency. In large-scale industrial production, it can not only meet the output demand, but also cooperate with the spray pressure and spray height to achieve continuous and stable coating effect. The spray height of 30cm can provide a suitable spray distance, so that the atomized paint has enough space and time to disperse evenly, avoiding the immediate accumulation of paint after spraying, making the coating surface smoother and flatter, helping to control the amount of paint and reduce waste. At the same time, the uniform coating effect can improve the appearance quality and performance consistency of the product and enhance the competitiveness of the product in the market.

[0058] In S3, the speed of the drying oven is 5 m / min, the humidity of the drying oven is 30%, and the temperature of the drying oven is 200°C.

[0059] The speed of 5 meters / minute can make the reflective film stay in the drying box for a proper time, which helps the solvent in the coating to fully volatilize, and avoids low production efficiency due to too long residence time. It can ensure that each layer of coating is dried evenly, make the combination between the layers more firm, and improve the overall performance of the reflective film;

[0060] A relatively low humidity environment of 30% is conducive to the rapid evaporation of water in the coating. In the production of reflective film, this can reduce drying time, improve production efficiency, and help avoid water marks on the coating surface caused by high humidity or affect the optical properties of the coating;

[0061] The high temperature of 200°C can quickly provide a large amount of heat energy for the coating, accelerate the evaporation of solvents and the curing of the coating. For example, it helps to form a denser and more uniform coating structure and enhance the scratch and wear resistance of the reflective film. The high temperature can also promote chemical reactions between the layers, improve the interlayer bonding strength, and make the reflective film less likely to delaminate during use.

[0062] In S4, the preheating temperature of the hot pressing equipment is 200°C, the hot pressing pressure is 30 MPa, and the hot pressing time is 60 minutes.

[0063] The preheating temperature of 200℃ can make each layer of the multi-layer composite material reach a suitable initial state before hot pressing, which helps to improve the compatibility and bonding strength between the layers, partially soften the polymer material, and increase the fluidity of the molecules, so that it is easier to achieve a tight bond during hot pressing;

[0064] The high pressure of 30MPa can effectively compact the multi-layer materials and reduce the gaps and bubbles between the layers. In the application of reflective film, this can ensure that the reflection path of light in the film layer is more stable and improve the reflective effect. At the same time, the high pressure can make the microstructure of each layer of material more compact and enhance the overall strength and wear resistance of the film.

[0065] The 60-minute hot pressing time is long enough to allow the heat to be fully transferred to the interior of the multilayer material, making the bonding between the layers more complete and uniform. Taking multilayer polymer composites as an example, long-term hot pressing can promote the cross-linking reaction between molecules and improve the stability and durability of the film.

[0066] In S5, the thickness of the adhesive layer is 15 microns for epoxy adhesive.

[0067] The thickness of 15 microns can provide sufficient adhesion to ensure that the layers of the reflective film are tightly bonded, and it is not easy to delaminate or peel off during use, thus ensuring the structural stability of the reflective film. The thickness of the 15-micron epoxy adhesive layer will not excessively increase the overall thickness of the reflective film while ensuring the bonding effect. This can meet the needs of lightweight and thinness for some application scenarios that have strict requirements on thickness.

[0068] In S6, the temperature of the hot air oven is 300°C, and the wind speed of the hot air oven is 5 m / s.

[0069] The high temperature of 300℃ can quickly provide a large amount of heat energy, accelerate the volatilization rate of the solvent in the coating and the curing process of the coating. For coatings containing high molecular polymers, high temperature can promote the cross-linking and crystallization of polymer molecular chains, thereby improving the hardness and wear resistance of the coating. At the same time, high temperature can also help eliminate the internal stress in the coating and enhance the adhesion between the coating and the substrate.

[0070] The wind speed of 5m / s can effectively distribute the hot air evenly inside the oven, making the surface of the reflective film heated more evenly, which helps to avoid problems such as uneven coating drying and inconsistent performance caused by local temperature differences.

[0071] In S7, the slitting equipment includes a knife-type slitting machine.

[0072] The knife-type slitting machine can provide precise cutting dimensions, which is crucial for products such as reflective film that require high dimensional accuracy. Accurate slitting can ensure that the size of each section of reflective film meets the design requirements. Its cutting action is crisp and neat, which can ensure neat and smooth incisions, which helps to reduce burrs and rough edges on the edges, and avoid affecting the fitting, installation and appearance of the reflective film due to irregular edges during use. At the same time, neat incisions are also conducive to improving the scratch and wear resistance of the reflective film, because irregular edges are more susceptible to damage from external forces.

[0073] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-layer composite coating process based on a scratch-resistant and wear-resistant reflective film, characterized in that: The following steps are involved: S1. Prepare materials: prepare materials to be coated and compounded, wherein the compounded materials include a substrate, a reflective material and an adhesive; S2. Coating the anti-scratch and wear-resistant layer: firstly, coating a layer of adhesive on the substrate, and then using a spray coating method to evenly coat the adhesive on the substrate, and then bonding the anti-scratch and wear-resistant layer to the substrate; S3, first drying and curing: the substrates coated with the primer are neatly stacked and placed in the drying area, and the conveyor is started to convey them into the drying box for drying so that the primer forms a solid coating, and then the solvent in the primer is removed to cure it, ensuring that the primer is completely dry; S4, composite material: compound the dried substrate with the reflective material, select the material to be compounded, ensure that its surface is clean, flat, free of oil and impurities, stack the materials to be compounded neatly in a predetermined order, put the stacked materials into the working area of ​​the hot press, start the hot press, heat the materials through the heating plate, and apply the set pressure at the same time. After reaching the set hot pressing time, keep the pressure unchanged, let the material gradually cool under pressure, and after cooling to a suitable temperature, release the pressure and take out the compounded material. The hot pressing equipment includes a hot pressing compounding machine; S5, coating adhesive layer: first clean the surface of the coated substrate to remove dust, oil stains and impurities to ensure a good bonding effect, then put it into the coating area, and then evenly spray the coating adhesive on the surface of the coated base for bonding, the coating adhesive layer includes polyurethane adhesive or epoxy adhesive; S6, Second drying and curing: During the production process of coil coating, a long-channel hot air oven is used to allow the coated coil to pass through it at a uniform speed to achieve uniform drying; S7. Slitting and packaging: Use slitting equipment to cut wide reflective film rolls into sheets or rolls of specific width and length, and then bundle and stack them for storage after cutting into the required size and shape.

2. A multi-layer composite coating process based on a scratch-resistant and wear-resistant reflective film according to claim 1, characterized in that: In S1, the thickness of the substrate is: polyester film 50-200 microns or polycarbonate 100-300 microns, the thickness of the reflective material is: reflective coating 100-500 microns or microprismatic reflective material 150-500 microns, and the proportion of the adhesive is: acrylate adhesive 10-30% or polyurethane adhesive 10-30%.

3. The multi-layer composite coating process based on the scratch-resistant and wear-resistant reflective film according to claim 1, characterized in that: In S2, during spray coating, the spray pressure is 1-10 MPa, the conveying speed is 1-8 m / min, and the spray height is 10-30 cm.

4. The multi-layer composite coating process based on the scratch-resistant and wear-resistant reflective film according to claim 1, characterized in that: In S3, the speed of the drying oven is between 0.5 and 5 m / min, the humidity of the drying oven is between 10% and 30%, and the temperature of the drying oven is between 50 and 200°C.

5. The multi-layer composite coating process based on the scratch-resistant and wear-resistant reflective film according to claim 1, characterized in that: In S4, the preheating temperature of the hot pressing equipment is 80°C-200°C, the hot pressing pressure is 5MPa-30MPa, and the hot pressing time is 10 seconds-60 minutes.

6. The multi-layer composite coating process based on the scratch-resistant and wear-resistant reflective film according to claim 1, characterized in that: In S5, the thickness of the adhesive layer is 5-15 microns for polyurethane adhesive or 5-15 microns for epoxy adhesive.

7. The multi-layer composite coating process based on the scratch-resistant and wear-resistant reflective film according to claim 1, characterized in that: In S6, the temperature of the hot air oven is 50°C-300°C, and the wind speed of the hot air oven is 0.5m / s-5m / s.

8. The multi-layer composite coating process based on the scratch-resistant and wear-resistant reflective film according to claim 1, characterized in that: In S7, the slitting equipment includes a CNC reflective film slitting machine or a knife-type slitting machine.

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