A high-strength aluminum-plated film and preparation method thereof

Abstract

The present application relates to the field of aluminized film production, and specifically to a high-strength aluminized film and a preparation method thereof. The high-strength aluminized film includes a base layer, an adhesive layer, a core layer and an aluminized layer, wherein the adhesive layer is arranged on both sides of the core layer and is connected to the base layer and the aluminized layer respectively, and the material of the core layer is a polyimide-polyetheretherketone copolymer or an ortho-diphenol-polyetheretherketone copolymer; the adhesive layer is made of a modified coumarone resin, and the modified coumarone resin includes the following raw materials by weight: 28 to 32 parts of coumarone resin, 14 to 17 parts of glass fiber, 2 to 4 parts of calcium stearate-laurate, and 1 to 3 parts of an antioxidant. The present application is conducive to improving the use strength of the existing aluminized film in a hot and humid environment, while broadening the scope of application of the aluminized film.

Description

Technical Field

[0001] The present application relates to the field of aluminum-plated film production, and more specifically, it relates to a high-strength aluminum-plated film and a preparation method thereof. Background Art

[0002] Aluminized film is a composite flexible packaging material that is formed by using a special process to coat a very thin layer of metal aluminum on the surface of a plastic film. It has the characteristics of both plastic film and metal. It is a cheap, beautiful, high-performance and practical packaging material. Therefore, aluminized film has been widely used in the packaging of food, medicine, chemical products, such as fast food, tea, coffee and cosmetics.

[0003] At present, aluminized films are generally made by vacuum aluminizing, that is, melting and evaporating metal aluminum at high temperature under high vacuum conditions, so that the aluminum vapor is precipitated and accumulated on the surface of the plastic film, thereby giving the plastic film a metallic luster and barrier properties. However, due to the poor high temperature and humidity resistance of existing aluminized films, the strength of aluminized films placed in a high humidity and heat environment for a long time decreases rapidly, and it is easy to cause damage, which limits the application scope of existing aluminized films. Summary of the invention

[0004] In order to improve the use strength of the existing aluminum-plated film in a hot and humid environment and broaden the application scope of the aluminum-plated film, the present application provides a high-strength aluminum-plated film and a preparation method thereof.

[0005] In a first aspect, the present application provides a high-strength aluminum-plated film, which adopts the following technical solution:

[0006] A high-strength aluminum-plated film comprises a base layer, an adhesive layer, a core layer and an aluminum-plated layer, wherein the adhesive layer is arranged on both sides of the core layer and is connected to the base layer and the aluminum-plated layer respectively.

[0007] The material of the core layer is polyimide-polyetheretherketone copolymer or ortho-diphenol-polyetheretherketone copolymer;

[0008] The adhesive layer is made of modified coumarone resin, which includes the following raw materials in weight fractions: 28 to 32 parts of coumarone resin, 14 to 17 parts of glass fiber, 2 to 4 parts of calcium stearate-laurate, and 1 to 3 parts of antioxidant.

[0009] By adopting the above technical scheme, the base layer, the adhesive layer and the core layer can be tightly combined with each other, wherein the material of the core layer is selected from one of polyimide-polyetheretherketone copolymers or ortho-diphenol-polyetheretherketone copolymers, and both polyimide-polyetheretherketone copolymers or ortho-diphenol-polyetheretherketone copolymers have good mechanical properties and high temperature resistance, and can enhance the overall strength of the aluminum-plated film under high temperature conditions; at the same time, the adhesive layer is selected from modified coumarone resin material, and the compatibility between the modified coumarone resin molecular chains and the copolymer molecular chains is utilized to make the modified coumarone resin molecular chains on both sides connect with the copolymer molecules of the core layer and penetrate the core layer, thereby realizing the mutual connection of the modified coumarone resin molecular chains on both sides, so that the modified coumarone resin adhesive layers on both sides can be more firmly combined on both sides of the core layer, so that the base layer and the aluminum-plated film can be more firmly and tightly combined under the action of the core layer and the adhesive layer, thereby reducing the cracking and damage of the aluminum-plated film in a hot and humid environment, so that the service life and application scenarios of the aluminum-plated film of this application can be greatly improved;

[0010] In addition, the glass fiber and antioxidant in the modified coumarone resin can be effectively combined with the molecular chain of the coumarone resin to enhance the mechanical properties, heat resistance and corrosion resistance of the coumarone resin, so as to facilitate the cooperation between the adhesive layer and the core layer to better improve the flexibility, tensile strength, high temperature resistance and corrosion resistance of the aluminum-plated film of this application; at the same time, calcium stearate-laurate can produce a synergistic effect with the coumarone resin, effectively stretching the molecular chain of the coumarone resin, so that the modified coumarone resin on both sides can better penetrate the copolymer molecular chain of the core layer, so as to achieve the purpose of enhancing the overall mechanical properties of the aluminum-plated film under hot and humid conditions.

[0011] Preferably, the thickness ratio of the base layer, the adhesive layer and the core layer is (2-4):(1.2-1.8):(10-14).

[0012] By adopting the above-mentioned technical scheme, the thickness of the base layer, the adhesive layer and the core layer are controlled within a specified proportion range, so that the adhesion of the three can be further improved, so that the tensile strength and elongation at break of the aluminum-coated film of the present application can be maintained while effectively improving the overall flexibility of the aluminum-coated film to a greater extent.

[0013] Preferably, the antioxidant consists of bisphenol A and bisphenol F, and the weight ratio of bisphenol A to bisphenol F is 1:(1-3).

[0014] By adopting the above technical scheme, the synergistic effect of bisphenol A and bisphenol F can be fully exerted, thereby improving the modification effect of the antioxidant on the coumarone resin, so that the modified coumarone resin can better enhance the tensile strength and elongation at break of the aluminum-plated film as a whole.

[0015] Preferably, the diameter of the glass fiber is 4.8-5.8 μm.

[0016] By adopting the above technical scheme, the surface area of ​​the glass fiber can be increased, the contact area between the glass fiber and the coumarone resin is increased, and the synergistic effect between the two is enhanced, thereby achieving the purpose of further improving the connection strength between the adhesive layer and the core layer, which is conducive to better enhancing the overall mechanical properties of the aluminum-coated film in a humid and hot environment.

[0017] Preferably, the melting point of the calcium stearate-laurate is 150°C.

[0018] By adopting the above technical scheme, it is beneficial to fully exert the emulsifying and dispersing effect of calcium stearate-laurate in the solution system, so that the coumarone resin in the solution can be extended more fully and evenly, thereby improving the bonding strength between the modified coumarone resin and the core layer, thereby achieving the purpose of further improving the overall tensile strength and elongation at break of the aluminum-plated film in a high temperature and high humidity environment.

[0019] Preferably, the material of the base layer is a polyester film.

[0020] By adopting the above technical scheme, the modified coumarone resin can be better bonded to the surface of the base layer, and the tensile strength and elongation at break of the aluminum-coated film under wet and hot conditions can be further enhanced without significantly reducing the flexibility of the aluminum-coated film, thereby facilitating better control of the production cost of the aluminum-coated film.

[0021] Preferably, the material of the aluminum plating layer is an aluminum-magnesium alloy or an aluminum-silicon alloy.

[0022] By adopting the above-mentioned technical scheme, when the inventor selects aluminum-magnesium alloy or aluminum-silicon alloy as the material of the aluminum coating, the connection strength between the aluminum coating and the adhesive layer can be better improved, thereby enhancing the tensile strength and elongation at break of the aluminum coating in a high temperature and high humidity environment, thereby achieving the purpose of further broadening the application scope of the five-layer composite structure aluminum coating film of the present application.

[0023] In a second aspect, the present application provides a method for preparing a high-strength aluminum-plated film, using the following technical solution:

[0024] A method for preparing a high-strength aluminum-plated film comprises the following steps:

[0025] Preparation of adhesive layer solution: adding coumarone resin, calcium stearate-laurate and antioxidant according to weight ratio, heating and dissolving in solvent A to form solution a; adding glass fiber to solution a according to weight ratio, heating and mixing to form adhesive layer solution;

[0026] Preparation of core layer solution: Heat the core layer material and dissolve it in solvent B to obtain a core layer solution;

[0027] The adhesive layer solution is applied to the surface of the base layer after surface pretreatment, and the adhesive layer is formed on the surface of the base layer after standing and drying, then the core layer solution is applied to the surface of the adhesive layer, and the core layer is formed on the surface of the adhesive layer after standing and drying, and then the adhesive layer solution is applied to the surface of the core layer, and another adhesive layer is formed on the surface of the core layer after standing and drying;

[0028] The base layer with an adhesive layer and a core layer formed on the surface is placed in a vacuum coating device, and then the solid aluminum or aluminum alloy material is heated to its vaporization temperature to form vapor, which condenses on the surface of the adhesive layer to form an aluminum-plated film. After cooling and solidification, a high-strength aluminum-plated film is obtained.

[0029] By adopting the above steps to prepare the aluminized film, the aluminized film can form a stable five-layer composite structure, thereby improving the tensile strength, elongation at break and flexibility of the aluminized film under hot and humid conditions, thereby achieving the purpose of broadening the application range of the aluminized film.

[0030] In summary, this application has the following beneficial effects:

[0031] 1. The aluminum-plated film of the present application is a five-layer composite structure, so that the base layer, the adhesive layer and the core layer can be tightly combined with each other, wherein the material of the core layer is selected from one of polyimide-polyetheretherketone copolymers or ortho-diphenol-polyetheretherketone copolymers, and both polyimide-polyetheretherketone copolymers or ortho-diphenol-polyetheretherketone copolymers have good mechanical properties and high temperature resistance, and can enhance the overall strength of the aluminum-plated film under high temperature conditions; at the same time, the adhesive layer is selected from modified coumarone resin material, and the modified coumarone resin molecular chain and the copolymer are used to form a bonded ... The compatibility between the molecular chains enables the modified coumarone resin molecular chains on both sides to be interconnected with the copolymer molecules of the core layer and penetrate the core layer, thereby realizing the interconnection of the modified coumarone resin molecular chains on both sides, so that the modified coumarone resin adhesive layers on both sides can be more firmly bonded to the two sides of the core layer, so that the base layer and the aluminized film can be more firmly and tightly bonded under the action of the core layer and the adhesive layer, thereby reducing the cracking and damage of the aluminized film in a hot and humid environment, so that the service life and application scenarios of the aluminized film of this application can be greatly improved;

[0032] 2. By controlling the thickness of the base layer, the adhesive layer and the core layer within a specified ratio range, the adhesion of the three layers can be further improved, so that the tensile strength and elongation at break of the aluminized film of the present application can be maintained, and the overall flexibility of the aluminized film can be effectively improved to a greater extent;

[0033] 3. By using specific steps to prepare the aluminized film, the aluminized film can form a stable five-layer composite structure, thereby improving the tensile strength, elongation at break and flexibility of the aluminized film under hot and humid conditions, thereby achieving the purpose of broadening the scope of use of the aluminized film. DETAILED DESCRIPTION

[0034] The present application is further described in detail below in conjunction with embodiments and comparative examples.

[0035] Example 1

[0036] A high-strength aluminum-plated film is prepared by the following steps:

[0037] Preparation of adhesive layer solution: 32g of coumarone resin, 2g of calcium stearate-laurate and 1g of hydroxybenzoate were weighed in weight proportion, added one by one to 200g of solvent A, heated to 200°C, and stirred to form solution a; 14g of glass fiber was weighed in weight proportion, heated to 110°C to dry its surface moisture, and then added to solution a, heated to 650°C, and mixed evenly to obtain an adhesive layer solution;

[0038] Preparation of core layer solution: 30 g of polyimide-polyetheretherketone copolymer was added to 200 g of solvent B, heated to 150° C. and stirred evenly to obtain a core layer solution;

[0039] The adhesive layer solution is evenly coated on the surface of the base layer that has been pre-treated by grinding and drying, and the adhesive layer is formed on the surface of the base layer after standing and drying, then the core layer solution is evenly coated on the surface of the adhesive layer, and the core layer is formed on the surface of the adhesive layer after standing and drying, and then the adhesive layer solution is evenly coated on the surface of the core layer, and another adhesive layer is formed on the other surface of the core layer after standing and drying;

[0040] The base layer with an adhesive layer and a core layer formed on the surface is placed in an evaporative vacuum coating machine, and then the pure aluminum solid material is heated to its vaporization temperature to form vapor, which condenses on the surface of the adhesive layer away from the core layer to form a 500nm aluminum-plated film. After cooling and solidification, a high-strength aluminum-plated film is obtained.

[0041] Among them, in Example 1, solvent A is n-heptane, solvent B is dimethyl sulfoxide, the thickness ratio of the base layer, adhesive layer and core layer of the aluminum-plated film is 1:1:9, the diameter of the glass fiber is 10.5-11.5 μm, the melting point of calcium stearate-laurate is 120°C, and the material of the base layer is BOPE film.

[0042] Example 2

[0043] A high-strength aluminum-plated film, which is different from Example 1 in that it contains 28g of coumarone resin, 4g of calcium stearate-laurate, 3g of hydroxybenzoate, and 17g of glass fiber.

[0044] Example 3

[0045] A high-strength aluminum-plated film, which differs from Example 2 in that the material of the core layer adopts ortho-diphenol-polyetheretherketone copolymer instead of polyimide-polyetheretherketone copolymer.

[0046] Example 4

[0047] A high-strength aluminum-plated film, which is different from Example 3 in that the thickness ratio of the base layer, the adhesive layer and the core layer of the aluminum-plated film is 4:1.2:10.

[0048] Example 5

[0049] A high-strength aluminum-plated film, which is different from Example 3 in that the thickness ratio of the base layer, the adhesive layer and the core layer of the aluminum-plated film is 2:1.8:14.

[0050] Example 6

[0051] A high-strength aluminum-plated film, which is different from Example 5 in that the thickness of the aluminum-plated layer is 200-400nm.

[0052] Example 7

[0053] A high-strength aluminum-plated film, which is different from Example 6 in that bisphenol A and bisphenol F are used as antioxidants to replace hydroxybenzoic acid esters, and the weight ratio of bisphenol A to bisphenol F is 1:1.

[0054] Example 8

[0055] A high-strength aluminum-plated film, which is different from Example 6 in that bisphenol A and bisphenol F are used as antioxidants to replace hydroxybenzoic acid esters, and the weight ratio of bisphenol A to bisphenol F is 1:3.

[0056] Example 9

[0057] A high-strength aluminum-plated film, which is different from Example 6 in that the diameter of the glass fiber is 4.8-5.8 μm.

[0058] Example 10

[0059] A high-strength aluminum-plated film, which is different from Example 6 in that the melting point of calcium stearate-laurate is 150°C.

[0060] Embodiment 11

[0061] A high-strength aluminum-plated film, which is different from Example 3 in that the material of the base layer is polyester film instead of BOPE film.

[0062] Example 12

[0063] A high-strength aluminum-plated film, which differs from Example 3 in that the material of the aluminum-plated layer adopts aluminum-magnesium alloy instead of pure aluminum.

[0064] Embodiment 13

[0065] A high-strength aluminum-plated film, which differs from Example 3 in that the material of the aluminum-plated layer adopts aluminum-silicon alloy instead of pure aluminum.

[0066] Comparative Example 1

[0067] The difference between this comparative example and Example 1 is that an equal amount of coumarone resin is used instead of modified coumarone resin as the adhesive layer solution.

[0068] Comparative Example 2

[0069] The difference between this comparative example and Example 1 is that an equal amount of polyamide is used to replace the polyimide-polyetheretherketone copolymer as the core layer solution.

[0070] Comparative Example 3

[0071] The difference between this comparative example and Example 1 is that an equal amount of coumarone resin is used to replace the modified coumarone resin as the adhesive layer solution, and an equal amount of polyamide is used to replace the polyimide-polyetheretherketone copolymer as the core layer solution.

[0072] Performance testing

[0073] Mechanical properties 1: The (MD) tensile strength MPa of the aluminum-coated films of Examples 1-13 and Comparative Examples 1-3 at a relative humidity of 90% and a temperature of 50°C was tested using "GB / T1040.1-2018 Determination of tensile properties of plastics Part 1: General". The higher the tensile strength value, the better the mechanical properties of the aluminum-coated film.

[0074] Mechanical properties 2: The (MD) elongation at break (%) of the aluminum-coated films of Examples 1-13 and Comparative Examples 1-3 at a relative humidity of 90% and a temperature of 50°C was tested using "GB / T1040.1-2018 Determination of tensile properties of plastics Part 1: General". The higher the elongation at break, the better the mechanical properties of the aluminum-coated film.

[0075] Mechanical property 3: GB / T 1731-93 “Determination of paint film flexibility” was used to test the flexibility of the aluminum-plated films of Examples 1-13 and Comparative Examples 1-3. The aluminum-plated films of Examples 1-13 and Comparative Examples 1-3 were bent in sequence using shaft rods with diameters of 3 mm, 5 mm, 6 mm, 8 mm, 10 mm, 12 mm and 15 mm, respectively, to determine the minimum shaft rod diameter that would not cause damage to the aluminum-plated films. The smaller the minimum shaft rod diameter, the better the flexibility of the aluminum-plated film.

[0076] Corrosion resistance: GB / T 1771-2007 "Determination of neutral salt spray resistance of paints and varnishes" was used to test the corrosion resistance of the aluminum-plated films obtained in Examples 1-13 and Comparative Examples 1-3. The corrosion conditions on the surfaces of the samples were rated in accordance with the rating chart in the standard, where A represents blistering, B represents shedding, and C represents rusting.

[0077] Table 1 - Summary of test data of Examples 1-13 and Comparative Examples 1-3

[0078]

[0079]

[0080] According to the comparison of the test data of Example 1 and Comparative Example 1 in Table 1, it can be seen that compared with the aluminum-plated film using pure coumarone resin as the bonding layer, the five-layer composite structure aluminum-plated film of the present application using modified coumarone resin as the bonding layer has greatly improved mechanical properties and corrosion resistance under high temperature and high humidity conditions. Therefore, the five-layer composite structure aluminum-plated film of the present application can replace the existing aluminum-plated film, thereby achieving the purpose of extending the service life of the aluminum-plated film under hot and humid conditions, which is beneficial for enterprises to promote and apply the aluminum-plated film of the present application.

[0081] According to the comparison of the test data of Example 1 and Comparative Example 2 in Table 1, it can be seen that compared with the aluminum-plated film using polyamide as the core layer, the five-layer composite structure aluminum-plated film using polyimide-polyetheretherketone copolymer as the core layer in the present application has greatly improved mechanical properties and corrosion resistance under high temperature and high humidity conditions, which can intuitively reflect the importance of the core layer material as the intermediate connecting layer. In the present application, the use of polyimide-polyetheretherketone copolymer as the core layer can effectively enhance the composite effect of the adhesive layer and the core layer, thereby achieving the purpose of simultaneously improving the tensile strength, elongation at break and flexibility of the aluminum-plated film of the present application.

[0082] According to the comparison of the test data of Example 1 and Comparative Example 3 in Table 1, it can be seen that compared with the five-layer composite structure aluminum-plated film prepared after modification in the present application, if an unmodified adhesive layer and a core layer of different materials are used to compositely prepare a five-layer composite structure aluminum-plated film, the tensile strength, elongation at break, flexibility and corrosion resistance of the five-layer composite structure aluminum-plated film will be greatly reduced, affecting the service life of the five-layer composite structure aluminum-plated film under high temperature and high humidity conditions, which is not conducive to the promotion and application of the five-layer composite structure aluminum-plated film.

[0083] According to the comparison of the experimental data of Examples 1-2 in Table 1, it can be seen that when the inventor adjusts the amount of modified coumarone resin added, an aluminum-plated film with better tensile strength and elongation at break under high temperature and high humidity conditions can be obtained, thereby further improving the service life of the five-layer composite structure aluminum-plated film of the present application under hot and humid conditions.

[0084] According to the comparison of the test data of Examples 2-3 in Table 1, it can be seen that when ortho-diphenol-polyetheretherketone is used as the material of the core layer, a five-layer composite aluminum-plated film with higher tensile strength and elongation at break can be obtained, which is conducive to the promotion and application of the five-layer composite aluminum-plated film.

[0085] According to the comparison of the test data of Examples 3-5 in Table 1, it can be seen that when the inventor controls the thickness ratio of the base layer, the bonding layer and the core layer in the aluminum-plated film within a specified range, the tensile strength and elongation at break of the five-layer composite structure aluminum-plated film of the present application can be maintained, and the flexibility can be effectively improved to a greater extent, thereby better balancing the mechanical performance parameters between the tensile strength, elongation at break and flexibility of the aluminum-plated film of the present application, thereby achieving the purpose of further enhancing the service life of the five-layer composite structure aluminum-plated film under high temperature and high humidity conditions.

[0086] According to the comparison of the experimental data of Examples 5-6 in Table 1, it can be known that when the inventor reduces the thickness of the aluminum-plated film in the five-layer composite structure aluminum-plated film and controls it within a certain range, the tensile strength, elongation at break and flexibility of the five-layer composite structure aluminum-plated film of the present application do not show a decrease. It can be known that the mechanical properties of the five-layer composite structure aluminum-plated film of the present application are less sensitive to the thickness of the aluminum layer. Therefore, people can make targeted adjustments to the thickness of the aluminum layer of the five-layer composite structure aluminum-plated film. Therefore, the five-layer composite structure aluminum-plated film of the present application can more easily achieve a balance between thickness and various mechanical properties, thereby facilitating enterprises to control the production cost of the aluminum-plated film, and can also produce a five-layer composite structure aluminum-plated film with balanced mechanical properties, which has great economic value.

[0087] According to the comparison of the test data of Examples 6-8 in Table 1, it can be seen that when the inventors select bisphenol A and bisphenol F as antioxidants for addition, the tensile strength and elongation at break of the five-layer composite structure aluminum-plated film of the present application can be greatly improved; among them, when the weight ratio of bisphenol A to bisphenol F is controlled at 1:3, the tensile properties and elongation at break of the five-layer composite structure aluminum-plated film can be further improved, thereby better broadening the scope of use of the five-layer composite structure aluminum-plated film of the present application.

[0088] According to the comparison of the test data of Examples 6 and 9-10 in Table 1, it can be seen that when the inventors adjust the diameter of the glass fiber and the melting point of calcium stearate-laurate respectively, the tensile strength and elongation at break of the five-layer composite structure aluminum-plated film of the present application can be more effectively increased, thereby achieving the purpose of further improving the various mechanical properties of the five-layer composite structure aluminum-plated film of the present application under high temperature and high humidity environment.

[0089] According to the comparison of the test data of Example 3 and Example 11 in Table 1, it can be seen that when the inventor selects polyester film as the base material, the flexibility of the five-layer composite structure aluminum-plated film of the present application does not show a significant decrease, and the tensile strength and elongation at break of the aluminum-plated film can be enhanced to a large extent, thereby facilitating better control of the production cost of the aluminum-plated film, which has great economic value.

[0090] According to the comparison of the test data of Example 3 and Examples 12-13 in Table 1, it can be seen that when the inventor selects aluminum-magnesium alloy or aluminum-silicon alloy as the material of the aluminum coating layer, the five-layer composite structure aluminum coating film of the present application can enhance the tensile strength and elongation at break while maintaining the flexibility, thereby effectively extending the service life of the five-layer composite structure aluminum coating film of the present application under hot and humid conditions. Among them, compared with aluminum-silicon alloy, the use of aluminum-magnesium alloy as the aluminum coating layer material can improve the overall tensile strength and elongation at break of the aluminum coating film to a greater extent, thereby achieving the purpose of further expanding the application scope of the five-layer composite structure aluminum coating film.

[0091] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A high-strength aluminum-plated film, characterized in that: It includes a base layer, an adhesive layer, a core layer and an aluminum-plated layer, wherein the adhesive layer is arranged on both sides of the core layer and is connected to the base layer and the aluminum-plated layer respectively. The material of the core layer is polyimide-polyetheretherketone copolymer or ortho-diphenol-polyetheretherketone copolymer; The adhesive layer is made of modified coumarone resin, and the modified coumarone resin includes the following raw materials in weight fractions: 28 to 32 parts of coumarone resin, 14 to 17 parts of glass fiber, 2 to 4 parts of calcium stearate-laurate, and 1 to 3 parts of antioxidant; The thickness ratio of the base layer, the adhesive layer and the core layer is (2-4): (1.2-1.8): (10-14); The thickness of the aluminum plating layer is 200-400nm; The antioxidant is composed of bisphenol A and bisphenol F, and the weight ratio of bisphenol A to bisphenol F is 1:(1-3); The diameter of the glass fiber is 4.8-5.8 μm.

2. The high-strength aluminum-plated film according to claim 1, characterized in that: The melting point of the calcium stearate-laurate is 150°C.

3. The high-strength aluminum-plated film according to claim 1, characterized in that: The material of the base layer is a polyester film.

4. The high-strength aluminum-plated film according to claim 1, characterized in that: The material of the aluminum plating layer is one of aluminum-magnesium alloy or aluminum-silicon alloy.

5. A method for preparing a high-strength aluminum-plated film, used for preparing a high-strength aluminum-plated film according to any one of claims 1 to 4, characterized in that: The following steps are involved: Preparation of adhesive layer solution: adding coumarone resin, calcium stearate-laurate and antioxidant according to weight ratio, heating and dissolving in solvent A to form solution a; adding glass fiber to solution a according to weight ratio, heating and mixing to form adhesive layer solution; Preparation of core layer solution: Heat the core layer material and dissolve it in solvent B to obtain a core layer solution; The adhesive layer solution is applied to the surface of the base layer after surface pretreatment, and the adhesive layer is formed on the surface of the base layer after standing and drying, then the core layer solution is applied to the surface of the adhesive layer, and the core layer is formed on the surface of the adhesive layer after standing and drying, and then the adhesive layer solution is applied to the surface of the core layer, and another adhesive layer is formed on the surface of the core layer after standing and drying; The base layer with an adhesive layer and a core layer formed on the surface is placed in a vacuum coating device, and then the solid aluminum or aluminum alloy material is heated to its vaporization temperature to form vapor, which condenses on the surface of the adhesive layer to form an aluminum-plated film. After cooling and solidification, a high-strength aluminum-plated film is obtained.

Images