Double-layer aluminized composite film based on magnetron sputtering aluminizing process and preparation and application of double-layer aluminized composite film

Abstract

The invention discloses a double-layer aluminized composite film based on a magnetron sputtering aluminizing process and preparation and application thereof, and belongs to the technical field of preparation of aluminized composite films. According to the method, a needed plasma environment is provided for magnetron sputtering aluminum plating in a mode of heating and bombarding the surface of a target material by utilizing plasma, and when an aluminum plating base material is in a thermal stable state, functional coating acrylic resin can effectively reduce the problem of film deformation caused by thermal stress of an aluminum plating film in the sputtering process; the magnetron sputtering aluminum plating is performed on the two side surfaces twice, so that the thickness and the uniformity of the aluminum plating film can be ensured, the barrier property of the aluminum plating film to water vapor and oxygen at each time is also ensured, and a better bonding interface is provided for subsequent continuous film plating; and compounding is carried out after magnetron sputtering aluminum plating treatment, so that the compounding performance is accurately controlled. And finally, through double-time aluminum plating and double-time compounding, high barrier of the aluminum-plated composite film to water vapor and oxygen is realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of aluminum-plated composite film preparation, and in particular relates to a double-layer aluminum-plated composite film based on a magnetron sputtering aluminum-plating process, and the preparation and application thereof. Background Art

[0002] All forms of aging in photovoltaic modules can be categorized as material degradation. Moisture can affect modules in many ways, including adhesive loss, optical loss, delamination, discoloration, chemical corrosion of metal grid lines, potential-induced degradation of the photovoltaic module, and other material degradation. Delamination and chemical corrosion are the most serious. Moisture, combined with mechanical stress and UV exposure, can cause adhesion loss between solar cells, encapsulation materials, glass, and other layers, leading to delamination. Water vapor can penetrate the module interior, degrading the adhesion of the release film and exacerbating this delamination. Delamination can result in a localized output power loss of ≤4% at the encapsulation / cell interface.

[0003] In addition to the effects of stratification, water vapor penetration can also trigger a series of chemical changes. Generally speaking, metal corrosion occurs when the metal exchanges electrons with the outside world. In the presence of oxygen and moisture, metals will undergo electrochemical corrosion. In addition, photovoltaic-grade EVA films are known to produce acetic acid in the presence of moisture and other environmental stressors, which can cause corrosion of metal grid lines and other components of photovoltaic modules. Corrosion of grid lines and busbars can significantly reduce the power generation efficiency of modules. Corrosion of metal grid lines and solder ribbons in solar cells is considered the main cause of module performance degradation. The main corrosion path is moisture entering the interior of the module from the outside. Research has shown that glass backplanes can effectively capture harmful substances that catalyze moisture-driven corrosion, such as low-molecular-weight PET fragments from carbonyl, carboxyl, and phenolic sources.

[0004] The current market standard warranty period is 25 years, and the degradation rate must not exceed 5%. In the high humidity, heat, and salt fog of the ocean, water vapor penetration inevitably poses significant challenges to the useful lifespan and power degradation of modules. Therefore, offshore photovoltaics present significant economic risks. Currently, stringent damp heat testing results in an efficiency loss of 8%-10%, which is difficult to meet requirements.

[0005] Aluminum foil is an excellent water vapor barrier material, offering near-perfect barrier properties. However, it suffers from a fatal flaw: it easily cracks when bent, compromising its barrier properties. Furthermore, it is relatively expensive. Therefore, vacuum-coated aluminum composite film is being used instead. Vacuum-coated aluminum film offers excellent flexibility, preventing the significant reduction in barrier properties caused by cracking during bending. However, traditional vacuum-coated films have numerous drawbacks. The aluminum layer thickness is generally limited to 320-420 Å, with an oxygen barrier value of 6.0 ml / m² / 24 hours at 23°C and 50% RH, and a water barrier value of 1.5 g / m² / 24 hours at 38°C and 90% RH. These barrier properties still lag behind those of aluminum foil. Furthermore, after lamination, the aluminum layer often transfers to the adhesive layer. The water resistance of a single-layer aluminum coating is positively correlated with the thickness of the aluminum layer. Therefore, when coating an aluminum film, it is best to increase the film thickness to more than 500A. However, due to process limitations of conventional coatings, the peel strength of traditional vacuum aluminum coating composite films decreases significantly as the thickness of the aluminum layer increases. The advantages and disadvantages of thick coatings need to be resolved.

[0006] In addition to the problem of coating thickness, attention should also be paid to the transfer of the aluminum layer during aluminizing. The main reason is that the high temperature during vapor aluminizing causes the base polymer to expand and contract, which causes the aluminum film to move after cooling, ultimately resulting in insufficient uniformity. Summary of the Invention

[0007] In response to the above technical problems, the first purpose of the present invention is to provide a preparation method of a double-layer aluminum-plated composite film based on a magnetron sputtering aluminum-plating process, in which the plasma environment required for magnetron sputtering aluminum-plating is provided by heating and bombarding the target surface with plasma. When the aluminum-plated substrate is in a thermally stable state, the problem of film deformation caused by thermal stress during the sputtering process is effectively reduced; by setting two magnetron sputtering aluminum platings on both sides, not only the thickness and uniformity of the aluminum-plated film are guaranteed, but also the barrier properties of each aluminum-plated film to water vapor and oxygen are guaranteed, and a better bonding interface is provided for subsequent continued film plating; after the magnetron sputtering aluminum plating process, compounding is carried out to achieve precise control of the composite performance. Finally, through double aluminum plating + double compounding, a high barrier to water vapor and oxygen of the aluminum-plated composite film is achieved, and the bending strength is increased.

[0008] The second purpose of the present invention is to provide a double-layer aluminum-plated composite film based on the magnetron sputtering aluminum plating process as a basic membrane structure for use in the preparation of waterproof, high-barrier and weather-resistant materials. The double-layer aluminum-plated composite film has high barrier and weather resistance to water vapor and oxygen, which can further improve the structural mechanical properties and high barrier properties of waterproof materials; combined with the heat-sealing adhesive layer, the usage scenarios are further expanded.

[0009] The present invention is achieved through the following technical solutions: A method for preparing a double-layer aluminum-plated composite film based on a magnetron sputtering aluminum plating process comprises the following steps: S1, in 2×10 -4 Under a background vacuum environment of Pa or higher, an aluminum-plated substrate is selected and a functional coating is applied on one side thereof and dried; After the argon partial pressure in the environment is controlled by a mass flow meter to reach 0.13~0.15Pa, the target surface is heated and bombarded with plasma, and then the first magnetron sputtering aluminum coating treatment is performed to obtain film A; S2. Roll up film A and turn it over, apply a functional coating on the other side of the aluminum-plated substrate, dry it, and bombard the target surface with plasma again under background vacuum and argon partial pressure atmosphere, and then perform a second magnetron sputtering aluminum plating treatment to obtain a composite film.

[0010] Preferably, in S1, the aluminum-plated substrate is any one of a polyethylene terephthalate film, a polypropylene film, a polyethylene film and a polyvinylidene fluoride film; The thickness of the aluminum-plated substrate is 5 to 10 μm; The functional coating is acrylic resin or polyurethane resin; The acrylic resin is a thermoplastic acrylic resin; The coating is carried out using a coating machine with a coating speed of 10-100 m / min and a coating amount of 1-10 g / m 2 ; The drying temperature is 40-150°C and the drying time is 3-5 minutes; The first magnetron sputtering aluminum plating process is as follows: in a background vacuum, with an argon partial pressure of 0.13-0.15 Pa, heating to 175-180° C., and a sputtering power of 1100-1200 W for 10-60 minutes.

[0011] As a preference, in S2, at a background vacuum of 2×10 -4 Pa, the argon partial pressure reaches 0.13~0.15Pa, heated to 175~180℃, and the sputtering power is 1100~1200w for the second magnetron sputtering aluminum coating treatment for 10~60min.

[0012] A double-layer aluminum-plated composite film based on a magnetron sputtering aluminum-plating process is obtained by the preparation method.

[0013] An application of a double-layer aluminum-plated composite film based on a magnetron sputtering aluminum plating process in the preparation of a waterproof, high-barrier, and weather-resistant material, comprising: Assembly A: Hot pressing release fabric layers on both sides of the double-layer aluminized composite film based on the magnetron sputtering aluminizing process, annealing, aging, cooling, unloading, and slitting to obtain a waterproof, high-barrier, weather-resistant material; or, Assembly B: A release fabric layer is hot-pressed on one side of the double-layer aluminum-plated composite film based on the magnetron sputtering aluminum plating process, and a heat-sealing adhesive layer is hot-pressed on the other side. After annealing, aging, cooling, unloading, and slitting, a waterproof, high-barrier, and weather-resistant material is obtained.

[0014] Preferably, the preparation method of assembly A is: A double-layer aluminum-plated composite film is selected, adhesive is coated on the sides thereof, and then hot-pressed with a release fabric layer, and then annealed, cured, cooled, unloaded, and cut to obtain the product.

[0015] Preferably, the release fabric layer is made of polyethylene terephthalate.

[0016] Preferably, the preparation method of assembly B is: A double-layer aluminum-plated composite film is selected, and after adhesive is applied to one side of the film and then hot-pressed with the release fabric layer; Roll up and turn over, apply adhesive on the other side of the double-layer aluminum-plated composite film and heat-press it with the heat-sealing adhesive layer, anneal, mature, cool, unload and cut to obtain the film; The heat-sealing adhesive layer is a polyethylene film.

[0017] Preferably, the annealing condition is annealing at 200-300° C. for 30-120 min; The curing conditions are: curing at a humidity of ≤60% RH and 40-60° C. for 24-72 hours; The cooling rate is 8-10°C / min.

[0018] Preferably, the thickness of the waterproof, high-barrier, and weather-resistant material is 450-500 Å.

[0019] Compared with the prior art, the present invention has at least the following technical effects: The present invention provides a preparation method of a double-layer aluminum-plated composite film based on a magnetron sputtering aluminum plating process. In this method, the required plasma environment is provided for magnetron sputtering aluminum plating by heating and using plasma to bombard the surface of the target material. When the aluminum-plated substrate is in a thermally stable state, the functional coating acrylic resin can effectively reduce the problem of film deformation caused by thermal stress of the aluminum-plated film during the sputtering process. By setting up two magnetron sputtering aluminum platings on both sides, not only the thickness and uniformity of the aluminum-plated film are guaranteed, but also the barrier properties of each aluminum-plated film to water vapor and oxygen are guaranteed, and a better bonding interface is provided for subsequent continuous film plating. After the magnetron sputtering aluminum plating process, compounding is performed to achieve precise control of the compounding performance. Finally, through double aluminum plating + double compounding, a high barrier to water vapor and oxygen of the aluminum-plated composite film is achieved.

[0020] The double-layer aluminized composite film based on the magnetron sputtering aluminizing process is used as a basic membrane structure in the preparation of waterproof, high-barrier and weather-resistant materials. The double-layer aluminized composite film has high barrier and weather resistance to water vapor and oxygen, which can further improve the structural mechanical properties and high barrier properties of waterproof materials; combined with the heat-sealing adhesive layer, the application scenarios are further expanded.

[0021] The differences between the double-layer aluminum-plated composite film based on the magnetron sputtering aluminum-plating process and the aluminum-plated film in the prior art are as follows: (1) Structural level: The most common aluminized composite film structure currently consists of: fabric layer PET / adhesive layer / aluminized layer / aluminized substrate / heat-sealing layer. However, this product has undergone material and structural upgrades to increase the water barrier properties of the composite film. A proprietary coating is added between the adhesive layer and the aluminized layer to enhance the uniformity and thickness of the aluminized layer. The excellent chemical stability of the proprietary coating also increases the weather resistance of the composite film. In addition, the composite film of this project uses a double aluminized layer to further isolate air and water vapor penetration, providing excellent isolation properties.

[0022] (2) Process differences: Multi-layer aluminum coating film structure design, conventional aluminum coating generally adopts vacuum aluminum coating, vacuum aluminum coating disadvantages: 1. High technical requirements: The vacuum aluminum coating process has strict requirements on technical parameters such as vacuum degree and temperature control, which need to be precisely controlled to ensure product quality; 2. Possible adhesion problems: If the surface treatment of the substrate is not done properly, it may lead to insufficient adhesion between the aluminum coating layer and the substrate, affecting the performance and service life of the product; 3. Aluminum coating uniformity: Microscopic observation of VM-PET can reveal a large number of cracks and gaps. This is due to the tensile deformation of PET during the vacuum evaporation process. The commonly used coating method currently adopts evaporation vacuum aluminum coating, which leads to a high ambient temperature, causing the aluminum-coated substrate PET to expand thermally. After the coating is completed, the volume of the substrate shrinks, resulting in the destruction of the coating uniformity; 4. Maintenance cost: The daily maintenance and maintenance of vacuum vapor aluminum coating equipment also requires a certain cost to ensure the normal operation and production efficiency of the equipment. We abandoned vacuum aluminum coating and chose argon environment. Aluminum coating in argon environment, that is, magnetron sputtering technology, is carried out in argon atmosphere. Argon, an inert gas, serves as a protective atmosphere during the sputtering process, improving the adhesion of the coating. During magnetron sputtering, argon ions are accelerated and impact the aluminum target, sputtering aluminum atoms and depositing them on the substrate. This method can be performed at lower temperatures, making it suitable for heat-sensitive substrates, and produces a uniform, dense coating at a lower overall cost.

[0023] (3) Performance advantages: The aluminum-containing composite film produced by the new technology has a lower water vapor permeability because the aluminum coating layer is denser and more uniform, and it has a multi-layer composite structure; the tensile strength, elongation at break, and shear strength are better; and the overall weather resistance is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the structure of the double-layer aluminum-plated composite film prepared in Example 1; Figure 2 Schematic diagram of the structure of the double-layer aluminum-plated composite film prepared in Example 5; Figure 3 Schematic diagram of the structure of the double-layer aluminum-plated composite film prepared in Example 6; Figure 4 Schematic diagram of the molded product and related sealing equipment prepared using Example 1.

[0025] Among them, 1-release fabric layer; 2-adhesive layer, 3-aluminum coating layer, 4-functional coating, 5-aluminum substrate, 6-heat sealing adhesive layer. DETAILED DESCRIPTION

[0026] The embodiments of the present invention will be described in detail below with reference to the examples. However, those skilled in the art will understand that the following examples are only used to illustrate the present invention and should not be construed as limiting the scope of the present invention. Specific conditions not specified in the examples are carried out according to conventional conditions or conditions recommended by the manufacturer. Reagents or instruments used without indicating the manufacturer are conventional products that can be purchased commercially.

[0027] Example 1: A method for preparing a double-layer aluminum-plated composite film based on a magnetron sputtering aluminum plating process comprises the following steps: S1, in 2×10 -4 Under a background vacuum environment of Pa or higher, an aluminum-plated substrate 5 is selected and a functional coating 4 is coated on one side thereof and dried; After the argon partial pressure in the environment reached 0.15 Pa by controlling the mass flow meter, the target surface was heated and bombarded with plasma, and then the first magnetron sputtering aluminum coating treatment was performed to obtain the film A3; S2. Roll up film A and turn it over, apply a functional coating on the other side of the aluminum-plated substrate, dry it, and bombard the target surface with plasma again under background vacuum and argon partial pressure atmosphere, and then perform a second magnetron sputtering aluminum plating treatment to obtain a composite film.

[0028] In S1, the aluminum-plated substrate is a polyethylene terephthalate film; The thickness of the aluminum-plated substrate is 5 μm; The functional coating is acrylic resin; The acrylic resin is a thermoplastic acrylic resin; The coating was carried out using a coating machine with a coating speed of 30 m / min and a coating amount of 5 g / m 2 ; The drying temperature is 45°C and the drying time is 5 minutes; The first magnetron sputtering aluminum plating process is as follows: in a background vacuum, with an argon partial pressure of 0.15 Pa, heating to 175° C., and a sputtering power of 1200 W for 20 minutes.

[0029] The S2, in the background vacuum 2×10 -4 Pa, the argon partial pressure reaches 0.15Pa, it is heated to 175℃, and the sputtering power is 1200w for the second magnetron sputtering aluminum coating process for 20min.

[0030] The specific structure is as Figure 1 The schematic diagram shown.

[0031] like Figure 4 Shown are the molded product prepared using Example 1 (the first and second figures from left to right) and a schematic diagram of the related sealing equipment (the third figure from left to right).

[0032] Example 2: A method for preparing a double-layer aluminum-plated composite film based on a magnetron sputtering aluminum plating process comprises the following steps: S1, in 2×10 -4 Under a background vacuum environment of Pa or higher, an aluminum-plated substrate is selected and a functional coating is applied on one side thereof and dried; After the argon partial pressure in the environment reaches 0.15 Pa through mass flow meter control, the target surface is heated and bombarded with plasma, and then the first magnetron sputtering aluminum coating treatment is performed to obtain film A; S2. Roll up film A and turn it over, apply a functional coating on the other side of the aluminum-plated substrate, dry it, and bombard the target surface with plasma again under background vacuum and argon partial pressure atmosphere, and then perform a second magnetron sputtering aluminum plating treatment to obtain a composite film.

[0033] In S1, the aluminum-plated substrate is a polypropylene film; The thickness of the aluminum-plated substrate is 5 μm; The functional coating is acrylic resin; The acrylic resin is a thermoplastic acrylic resin; The coating was carried out using a coating machine with a coating speed of 30 m / min and a coating amount of 5 g / m 2 ; The drying temperature is 45°C and the drying time is 5 minutes; The first magnetron sputtering aluminum plating process is as follows: in a background vacuum, with an argon partial pressure of 0.15 Pa, heating to 175° C., and a sputtering power of 1200 W for 60 minutes.

[0034] The S2, in the background vacuum 2×10 -4 Pa, the argon partial pressure reaches 0.15Pa, it is heated to 180℃, and the sputtering power is 1200w for a second magnetron sputtering aluminum coating process for 60min.

[0035] Example 3: A method for preparing a double-layer aluminum-plated composite film based on a magnetron sputtering aluminum plating process comprises the following steps: S1, in 2×10 -4 Under a background vacuum environment of Pa or higher, an aluminum-plated substrate is selected and a functional coating is applied on one side thereof and dried; After the argon partial pressure in the environment reaches 0.15 Pa through mass flow meter control, the target surface is heated and bombarded with plasma, and then the first magnetron sputtering aluminum coating treatment is performed to obtain film A; S2. Roll up film A and turn it over, apply a functional coating on the other side of the aluminum-plated substrate, dry it, and bombard the target surface with plasma again under background vacuum and argon partial pressure atmosphere, and then perform a second magnetron sputtering aluminum plating treatment to obtain a composite film.

[0036] In S1, the aluminized substrate is a polyethylene film; The thickness of the aluminum-plated substrate is 5 μm; The functional coating is acrylic resin; The acrylic resin is a thermoplastic acrylic resin; The coating was carried out using a coating machine with a coating speed of 30 m / min and a coating amount of 5 g / m 2 ; The drying temperature is 45°C and the drying time is 5 minutes; The first magnetron sputtering aluminum plating process is as follows: in a background vacuum, with an argon partial pressure of 0.15 Pa, heating to 175° C., and a sputtering power of 1200 W for 20 minutes.

[0037] The S2, in the background vacuum 2×10 -4 Pa, the argon partial pressure reaches 0.15Pa, it is heated to 175℃, and the sputtering power is 1200w for the second magnetron sputtering aluminum coating process for 20min.

[0038] Example 4: A method for preparing a double-layer aluminum-plated composite film based on a magnetron sputtering aluminum plating process comprises the following steps: S1, in 2×10 -4 Under a background vacuum environment of Pa or higher, an aluminum-plated substrate is selected and a functional coating is applied on one side thereof and dried; After the argon partial pressure in the environment reaches 0.15 Pa through mass flow meter control, the target surface is heated and bombarded with plasma, and then the first magnetron sputtering aluminum coating treatment is performed to obtain film A; S2. Roll up film A and turn it over, apply a functional coating on the other side of the aluminum-plated substrate, dry it, and bombard the target surface with plasma again under background vacuum and argon partial pressure atmosphere, and then perform a second magnetron sputtering aluminum plating treatment to obtain a composite film.

[0039] In S1, the aluminum-plated substrate is a polyvinylidene fluoride film; The thickness of the aluminum-plated substrate is 5 μm; The functional coating is acrylic resin; The acrylic resin is a thermoplastic acrylic resin; The coating was carried out using a coating machine with a coating speed of 30 m / min and a coating amount of 5 g / m 2 ; The drying temperature is 45°C and the drying time is 5 minutes; The first magnetron sputtering aluminum plating process is as follows: in a background vacuum, with an argon partial pressure of 0.15 Pa, heating to 175° C., and a sputtering power of 1200 W for 20 minutes.

[0040] The S2, in the background vacuum 2×10 -4 Pa, the argon partial pressure reaches 0.15Pa, it is heated to 175℃, and the sputtering power is 1200w for the second magnetron sputtering aluminum coating process for 20min.

[0041] Preparation method of assembly A: A double-layer aluminum-plated composite film is selected, and adhesive 2 is coated on its sides respectively, and then hot-pressed with a release fabric layer 1. After annealing, aging, cooling, unloading, and slitting, the film is obtained.

[0042] The release fabric layer is made of polyethylene terephthalate.

[0043] The annealing condition is annealing at 300° C. for 50 min; The curing conditions are: curing at a humidity of ≤60% RH and 60°C for 24 hours; The cooling rate is 8-10°C / min.

[0044] The thickness of the waterproof, high-barrier, and weather-resistant material is 500A.

[0045] The specific structure is as Figure 2 The schematic diagram shown.

[0046] The preparation method of assembly B is: A double-layer aluminum-plated composite film is selected, and after the adhesive 2 is coated on one side thereof and then hot-pressed with the release fabric layer 1; Roll up and turn over, apply adhesive 2 on the other side of the double-layer aluminum-plated composite film and heat-press it with the heat-sealing adhesive layer 6, anneal, mature, cool, unload and cut to obtain; The heat-sealing adhesive layer is a polyethylene film.

[0047] The annealing condition is annealing at 300° C. for 50 min; The curing conditions are: curing at a humidity of ≤60% RH and 60°C for 24 hours; The cooling rate is 8-10°C / min.

[0048] The thickness of the waterproof, high-barrier, and weather-resistant material is 500A.

[0049] The specific structure is as Figure 3 The schematic diagram shown.

[0050] Experimental Example 1: Verification results of the basic double-layer aluminum-plated composite film structure prepared based on Examples 1-4:

[0051] Experimental Example 2: Because offshore photovoltaics have only gained popularity in the past two years, the corresponding modules still use traditional production processes. Currently, there are no aluminum-containing composite films suitable for offshore photovoltaic modules on the market. The existing composite films cannot be directly applied to offshore photovoltaic modules for three main reasons: 1. Insufficient water resistance; 2. Insufficient tensile strength; 3. Insufficient adhesion; and 4. Insufficient weather resistance.

[0052] Experimental objects: Examples 1-4 and high-resistance water-resistant pressure-sensitive adhesive.

[0053] High-resistance water-resistant pressure-sensitive adhesive, mainly plays the role of adhering glass and composite film to enhance adhesion.

[0054] Figure 2 The sealing equipment is an aluminum foil edge sealing machine, which automates the packaging of composite films. The composite film sealing process is included in the existing production process and quickly put into mass production.

[0055] The following are the performance comparison results of various parameters of Examples 1-4 of this technical solution and high-resistance water-resistant pressure-sensitive adhesive.

[0056]

[0057] Combined with the above results, it can be seen that the product prepared by the technical solution of this application can effectively fill the market gap. Whether it is the water vapor isolation performance or various mechanical strengths of the double-layer aluminum-plated composite film, it is superior to the high water-resistance sealant currently on the market.

[0058] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A method for preparing a double-layer aluminum-plated composite film based on a magnetron sputtering aluminum plating process, characterized in that: The steps include: S1, at 2×10 -4 Under a background vacuum environment of Pa or higher, an aluminum-plated substrate is selected and a functional coating is applied on one side thereof and dried; After the argon partial pressure in the environment is controlled by a mass flow meter to reach 0.13~0.15Pa, the target surface is heated and bombarded with plasma, and then the first magnetron sputtering aluminum coating treatment is performed to obtain film A; S2, winding film A and turning it over, applying a functional coating on the other side of the aluminum-plated substrate, drying, and bombarding the target surface with plasma again under a background vacuum and argon partial pressure atmosphere, and then performing a second magnetron sputtering aluminum coating treatment to obtain a composite film; In S1, the aluminum-plated substrate is any one of a polyethylene terephthalate film, a polypropylene film, a polyethylene film, and a polyvinylidene fluoride film; The thickness of the aluminum-plated substrate is 5 to 10 μm; The functional coating is acrylic resin or polyurethane resin; The acrylic resin is a thermoplastic acrylic resin; The coating is carried out using a coating machine with a coating speed of 10-100 m / min and a coating amount of 1-10 g / m 2 ; The drying temperature is 40-150°C and the drying time is 3-5 minutes; The first magnetron sputtering aluminum plating process is as follows: in a background vacuum, with an argon partial pressure of 0.13-0.15 Pa, heating to 175-180° C., and a sputtering power of 1100-1200 W for 10-60 minutes; The S2, in the background vacuum 2×10 -4 Pa, the argon partial pressure reaches 0.13~0.15Pa, heated to 175~180℃, and the sputtering power is 1100~1200w for the second magnetron sputtering aluminum coating treatment for 10~60min.

2. A double-layer aluminum-plated composite film based on a magnetron sputtering aluminum plating process, characterized in that: It is obtained by the preparation method as claimed in claim 1.

3. A use of the double-layer aluminized composite film based on the magnetron sputtering aluminizing process according to claim 2 in the preparation of a waterproof, high-barrier, and weather-resistant material, characterized in that: include: Assembly A: Hot pressing release fabric layers on both sides of the double-layer aluminized composite film based on the magnetron sputtering aluminizing process, annealing, aging, cooling, unloading, and slitting to obtain a waterproof, high-barrier, weather-resistant material; or, Assembly B: A release fabric layer is hot-pressed on one side of the double-layer aluminum-plated composite film based on the magnetron sputtering aluminum plating process, and a heat-sealing adhesive layer is hot-pressed on the other side. After annealing, aging, cooling, unloading, and slitting, a waterproof, high-barrier, and weather-resistant material is obtained.

4. The use of a double-layer aluminum-plated composite film based on a magnetron sputtering aluminum plating process in the preparation of a waterproof, high-barrier, and weather-resistant material according to claim 3, characterized in that: The preparation method of assembly A is: A double-layer aluminum-plated composite film is selected, adhesive is coated on the sides thereof, and then hot-pressed with a release fabric layer, and then annealed, matured, cooled, unloaded, and cut to obtain the product.

5. The use of a double-layer aluminum-plated composite film based on a magnetron sputtering aluminum plating process in the preparation of a waterproof, high-barrier, and weather-resistant material according to claim 4, characterized in that: The release fabric layer is made of polyethylene terephthalate.

6. The use of a double-layer aluminum-plated composite film based on a magnetron sputtering aluminum plating process in the preparation of a waterproof, high-barrier, and weather-resistant material according to claim 3, characterized in that: The preparation method of assembly B is: A double-layer aluminum-plated composite film is selected, and after adhesive is applied to one side of the film and then hot-pressed with the release fabric layer; Roll up and turn over, apply adhesive on the other side of the double-layer aluminum-plated composite film and heat-press it with the heat-sealing adhesive layer, anneal, mature, cool, unload and cut to obtain the film; The heat-sealing adhesive layer is a polyethylene film.

7. The use of a double-layer aluminum-plated composite film based on a magnetron sputtering aluminum plating process in the preparation of a waterproof, high-barrier, and weather-resistant material according to claim 3, characterized in that: The annealing condition is annealing at 200-300°C for 30-120 minutes; The curing conditions are: curing at a humidity of ≤60% RH and 40-60° C. for 24-72 hours; The cooling rate is 8-10°C / min.

8. The use of a double-layer aluminum-plated composite film based on a magnetron sputtering aluminum plating process in the preparation of a waterproof, high-barrier, and weather-resistant material according to claim 3, characterized in that: The thickness of the waterproof, high-barrier, and weather-resistant material is 450 to 500 Å.

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