Oxidation-resistant film and preparation method thereof

Abstract

The invention provides an oxidation-resistant film. The oxidation-resistant film comprises a release film; the first pressure-sensitive adhesive layer is compounded on the release film; the first PET layer is compounded on the first pressure-sensitive adhesive layer; the metal layer is compounded on the first PET layer; the protective layer is compounded on the metal layer; the second PET layer is compounded on the protective layer; the anti-scraping layer is compounded on the second PET layer; the protective layer is formed by an adhesive for a composite film; the adhesive for the composite film is a 10wt%-30wt% solution formed by diluting a main agent and a curing agent with ethyl acetate according to a mass ratio of 100: (1-3); the main agent is polyurethane containing hydroxyl; and the curing agent is an ethyl acetate solution with 70-80 wt% of a TMP-TDI addition product. Compared with the prior art, the oxidation-resistant film provided by the invention adopts a specific layer structure and a connection relation, realizes relatively good overall interaction, and is low in metal layer oxidation speed on the basis that various properties meet requirements, so that a product is good in infrared ray blocking effect and stable for a long time.

Description

Technical Field

[0001] The present invention relates to the technical field of membrane materials, and more specifically to an oxidation-resistant membrane and a preparation method thereof. Background Art

[0002] Architectural film is a multi-layer PET composite film. By using vacuum multi-layer metal plating technology, ion technology, thin film physics, and fine chemical technology, it has excellent clarity, excellent strength and durability, as well as extremely high thermal insulation efficiency, impact resistance or decorative properties. It is adhered to the surface of materials such as glass through the backing glue. It is widely used in the fields of building energy conservation, building safety, and building decoration. It is a high-tech building material.

[0003] At present, the architectural films disclosed in the prior art generally include a PET substrate layer, a scratch-resistant layer on one side, a metal layer (reflecting heat or visible light, such as aluminum (Al), gold (Au), platinum (Pt), silver (Ag), copper (Cu), stainless steel (SUS, NiCr), TiN) on the other side, and mounting adhesive, protective film, etc. When two or more PET films are laminated, pressure-sensitive adhesive is usually used (see Figure 1 as shown).

[0004] However, in order to improve the adhesion between PET, the existing products have relatively strong acidity in the pressure-sensitive adhesive. The stronger the acidity, the faster the metal layer corrodes due to the reaction between hydrogen ions and metals, which makes the metal layer thinner and transparent, and eventually loses the effect of blocking infrared rays. Studies have shown that when using the metal film of the existing pressure-sensitive adhesive, when the metal layer is thin, it will oxidize and become transparent in one year under natural conditions; when the metal layer is thick, it will oxidize and become transparent after about three years. Summary of the invention

[0005] In view of this, the object of the present invention is to provide an oxidation-resistant film and a preparation method thereof. The oxidation-resistant film provided by the present invention has various performances that meet the requirements and a slow oxidation rate of the metal layer, so that the product has a good infrared blocking effect and is long-term stable.

[0006] The present invention provides an oxidation-resistant film, comprising:

[0007] Release film;

[0008] A first pressure-sensitive adhesive layer composited on the release film;

[0009] a first PET layer compounded on the first pressure-sensitive adhesive layer;

[0010] A metal layer composited on the first PET layer;

[0011] A protective layer composited on the metal layer;

[0012] A second PET layer composited on the protective layer;

[0013] an anti-scratch layer compounded on the second PET layer;

[0014] The protective layer is formed by a composite film adhesive; the composite film adhesive is a main agent and a curing agent in a mass ratio of 100: (1-3) diluted with ethyl acetate to form a 10wt%-30wt% solution;

[0015] The main agent is a hydroxyl-containing polyurethane; the curing agent is an ethyl acetate solution containing 70wt% to 80wt% of a TMP-TDI adduct.

[0016] Preferably, the release film has a thickness of 19 μm to 50 μm.

[0017] Preferably, the first pressure-sensitive adhesive layer is formed of polyacrylic acid pressure-sensitive adhesive; the polyacrylic acid pressure-sensitive adhesive comprises:

[0018] 8063 20 parts by weight to 70 parts by weight;

[0019] EA 40 to 80 parts by weight;

[0020] T-571 0.5 to 2 parts by weight.

[0021] Preferably, the thickness of the first pressure-sensitive adhesive layer is 5 μm to 20 μm.

[0022] Preferably, the thickness of the first PET layer is 12 μm to 188 μm.

[0023] Preferably, the material of the metal layer includes one or more of aluminum, gold, platinum, silver, copper, stainless steel, and TiN.

[0024] Preferably, the thickness of the protective layer is 2 μm to 11 μm.

[0025] Preferably, the anti-scratch layer is a polyacrylate coating; the polyacrylate coating is composed of BR100 and EA, wherein the content of BR100 is 15wt%~50wt%;

[0026] The anti-scratch layer has a thickness of 1 μm to 3 μm.

[0027] Preferably, it also includes:

[0028] a second pressure-sensitive adhesive layer;

[0029] The second pressure-sensitive adhesive layer is compounded between the protective layer and the second PET layer.

[0030] The present invention also provides a method for preparing the oxidation-resistant film described in the above technical solution, comprising the following steps:

[0031] A first pressure-sensitive adhesive layer, a first PET layer, a metal layer, a protective layer, a second PET layer and an anti-scratch layer are sequentially formed on the release film to obtain an oxidation-resistant film.

[0032] The present invention provides an oxidation-resistant film, comprising: a release film; a first pressure-sensitive adhesive layer compounded on the release film; a first PET layer compounded on the first pressure-sensitive adhesive layer; a metal layer compounded on the first PET layer; a protective layer compounded on the metal layer; a second PET layer compounded on the protective layer; an anti-scratch layer compounded on the second PET layer; the protective layer is formed by a composite film adhesive; the composite film adhesive is a main agent and a curing agent in a mass ratio of 100: (1-3) diluted with ethyl acetate to form a 10wt%-30wt% solution; the main agent is a hydroxyl-containing polyurethane; the curing agent is an ethyl acetate solution of 70wt%-80wt% of TMP-TDI adduct. Compared with the prior art, the oxidation-resistant film provided by the present invention adopts a specific layer structure and connection relationship to achieve overall good interaction. On the basis of meeting the requirements of various performances, the metal layer has a slow oxidation rate, so that the product has a good infrared blocking effect and long-term stability.

[0033] In addition, the preparation method provided by the present invention can ensure that each layer has a high interlayer bonding force, so that interlayer separation does not occur, and the process is simple, easy to operate, and suitable for large-scale industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of a membrane material in the prior art;

[0035] Figure 2 A schematic diagram of the structure of an oxidation-resistant film provided in Example 1 of the present invention;

[0036] Figure 3 A schematic diagram of the structure of an oxidation-resistant film provided in Example 2 of the present invention;

[0037] Figure 4 This is a schematic diagram of the structure of the oxidation-resistant film provided for Comparative Example 1. DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments 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.

[0039] Explanation of relevant terms:

[0040] Ultraviolet (UV): academic classification 0~380nm, broad classification 0~400nm, decomposes skin aging, skin cancer or organic matter.

[0041] Ultraviolet transmittance: UVT.

[0042] Visible light (VL): wavelength 380~780nm, the range that human vision can perceive.

[0043] Visible light transmittance (VLT%), visible light reflectance (VLR%).

[0044] Infrared (IR): Wavelength 780~2500nm, the column area cannot be seen with the naked eye.

[0045] Infrared transmittance (IRT%): measured at 940nm or 1400nm, infrared wavelength.

[0046] Total Solar Energy Rejection Ratio (TSER).

[0047] Inner scratch layer or anti-scratch layer (SR): UV-hardening or heat-hardening layer is manufactured, mainly UV-hardening type is used to prevent PET from scratching.

[0048] PET: Protective functional materials and mixed functional materials.

[0049] Dye or Pigment: Films come in a variety of colors, dyes fade quickly, and pigments fade slowly.

[0050] Ceramic: Uses dispersed materials of metal oxides to absorb heat, such as WO, ATO, and ITO.

[0051] Metal layer: reflects heat or reflects visible light, such as aluminum (Al), gold (Au), platinum (Pt), silver (Ag), copper (Cu), stainless steel (SUS, NiCr), TiN, and their alloys are coated in a single layer or double layer for use.

[0052] Vacuum deposition: coating Al on PET, Sputtering: coating metals other than Al.

[0053] Single silver: single layer of silver or silver alloy coating, double layer: silver or silver alloy coating twice.

[0054] Mounting Adhesive: The layer that sticks to the glass is called pressure-sensitive adhesive (PSA).

[0055] Composite layer: PET and PET adhesive layer use PSA and PU.

[0056] Release layer or release film: A film coated with a release agent on PET, which is applied to the mounting adhesive and removed before attaching to the glass.

[0057] At present, automotive films and architectural films generally use PET as the base material, and further composite metal material layers to achieve good barrier properties; the manufacturing method is mainly to use vacuum evaporation technology, CVD or PVD method, and CVD method is preferred; however, there is a problem of rapid oxidation due to the metal properties, and one of the purposes of the present invention is to slow down the oxidation rate of the metal layer.

[0058] On this basis, the present invention provides an oxidation-resistant film, comprising:

[0059] Release film;

[0060] A first pressure-sensitive adhesive layer composited on the release film;

[0061] a first PET layer compounded on the first pressure-sensitive adhesive layer;

[0062] A metal layer composited on the first PET layer;

[0063] A protective layer composited on the metal layer;

[0064] A second PET layer composited on the protective layer;

[0065] an anti-scratch layer compounded on the second PET layer;

[0066] The protective layer is formed by a composite film adhesive; the composite film adhesive is a main agent and a curing agent in a mass ratio of 100: (1-3) diluted with ethyl acetate to form a 10wt%-30wt% solution;

[0067] The main agent is a hydroxyl-containing polyurethane; the curing agent is an ethyl acetate solution containing 70wt% to 80wt% of a TMP-TDI adduct.

[0068] In the present invention, the oxidation-resistant film includes a release film, a first pressure-sensitive adhesive layer, a first PET layer, a metal layer, a protective layer, a second PET layer and an anti-scratch layer which are compounded in sequence; preferably, it also includes: a second pressure-sensitive adhesive layer; the second pressure-sensitive adhesive layer is compounded between the protective layer and the second PET layer.

[0069] In a preferred embodiment of the present invention, the oxidation resistant film is composed of a seven-layer structure of a release film, a first pressure-sensitive adhesive layer, a first PET layer, a metal layer, a protective layer, a second PET layer and an anti-scratch layer. In another preferred embodiment of the present invention, the oxidation resistant film is composed of an eight-layer structure of a release film, a first pressure-sensitive adhesive layer, a first PET layer, a metal layer, a protective layer, a second pressure-sensitive adhesive layer, a second PET layer and an anti-scratch layer.

[0070] Compared with the prior art in which the acidic pressure-sensitive adhesive directly contacts the metal layer (such as the aluminum-plated layer), the present invention uses a polyacrylic acid pressure-sensitive adhesive with a weaker acidity (pH above 6) to slow down the oxidation rate of the metal layer, and on the other hand, covers the metal layer with a protective layer with a pH close to neutral so that it does not contact the acidic pressure-sensitive adhesive material, thereby greatly slowing down the oxidation of the metal layer. Based on the above principle, the present invention provides two groups of overall structures, in which the protective layer of one group of overall structures is directly compounded on the metal layer, and then a layer of pressure-sensitive adhesive is compounded, and the pressure-sensitive adhesive layer is compounded with the PET layer to obtain a higher bonding force; the other group of overall structures compounds the protective layer on the metal layer, and then directly compounds it with the PET layer based on the viscosity of the protective layer itself; the above two groups of overall structures can achieve the beneficial effect of covering the metal layer with a neutral protective layer, thereby preventing the corrosion of the metal layer by hydrogen ions in the prior art.

[0071] In the present invention, the release film is a layer removed when the product is used, and the other layers are used layers as a whole. The present invention has no special restrictions on the source of the release film, and commercial products known to those skilled in the art can be used.

[0072] In the present invention, the thickness of the release film is preferably 19 μm to 50 μm.

[0073] In the present invention, the first pressure-sensitive adhesive layer is composited on the release film; the first pressure-sensitive adhesive layer is preferably formed of polyacrylic acid pressure-sensitive adhesive; the polyacrylic acid pressure-sensitive adhesive preferably includes:

[0074] 8063 20 parts by weight to 70 parts by weight;

[0075] EA 40 to 80 parts by weight;

[0076] T-571 0.5 to 2 parts by weight;

[0077] More preferably, it is composed of the following components:

[0078] 8063 20 parts by weight to 70 parts by weight;

[0079] EA 40 to 80 parts by weight;

[0080] T-571 0.5 to 2 parts by weight.

[0081] In the present invention, ultraviolet blocking material is added to the first pressure-sensitive adhesive layer, and better ultraviolet blocking performance can be achieved by achieving better overall interaction with other layer structures.

[0082] In the present invention, the thickness of the first pressure-sensitive adhesive layer is preferably 5 μm to 20 μm.

[0083] In the present invention, the first PET layer is compounded on the first pressure-sensitive adhesive layer; the first PET layer, i.e., the PET layer, is a transparent protective layer; the thickness of the first PET layer is preferably 12 μm to 188 μm, which can be changed to 188 μm according to the purpose of use, and is more preferably 20 μm to 30 μm.

[0084] In the present invention, the metal layer is composited on the first PET layer; the material of the metal layer preferably includes one or more of aluminum, gold, platinum, silver, copper, stainless steel, and TiN, and more preferably aluminum.

[0085] Taking aluminum (Al) as an example, the present invention coats Al on the PET layer using CVD technology, and various functions can be added to the PET layer, such as ultraviolet absorption, dye color, pigment color, ceramic heat absorption, etc. The present invention has no special restrictions on this, and can be achieved by using technical means familiar to those skilled in the art according to specific application requirements.

[0086] In the present invention, the protective layer is composited on the metal layer; the protective layer is formed by a composite film adhesive; the composite film adhesive is a main agent and a curing agent in a mass ratio of 100: (1-3) diluted with ethyl acetate to form a 10wt%-30wt% solution.

[0087] In the present invention, the main agent is a hydroxyl-containing polyurethane; the curing agent is a 70wt% to 80wt% ethyl acetate solution of TMP-TDI adduct. The present invention has no special restrictions on the sources of the main agent and the curing agent, and commercially available products or self-made products known to those skilled in the art can be used.

[0088] In the present invention, the thickness of the protective layer is preferably 2 μm to 11 μm.

[0089] In the present invention, the protective layer can also be compounded with the PET layer, and infrared blocking and ultraviolet blocking functional materials can be further added. By achieving better overall interaction with other layer structures, corresponding barrier properties can be achieved.

[0090] In the present invention, the second PET layer is compounded on the protective layer; or the oxidation-resistant film preferably also includes: a second pressure-sensitive adhesive layer; the second pressure-sensitive adhesive layer is compounded between the protective layer and the second PET layer; on this basis, the second pressure-sensitive adhesive layer is compounded on the protective layer, and the second PET layer is compounded on the second pressure-sensitive adhesive layer.

[0091] In the present invention, the second PET layer is the same as the first PET layer described in the above technical solution, and the second pressure-sensitive adhesive layer is the same as the first pressure-sensitive adhesive layer described in the above technical solution, which will not be repeated here.

[0092] In the present invention, the anti-scratch layer is compounded on the second PET layer; the function of the anti-scratch layer is to prevent scratches, and it is preferably a polyacrylate coating; the polyacrylate coating is preferably composed of BR100 and EA, wherein the content of the BR100 is preferably 15wt%~50wt%, and correspondingly, the content of the EA is preferably 85wt%~50wt%.

[0093] In the present invention, the thickness of the anti-scratch layer is preferably 1 μm to 3 μm.

[0094] The oxidation-resistant film provided by the present invention adopts a specific layer structure and connection relationship, especially adopts a specific protective layer to protect the metal layer, while not affecting the composite of the overall layer structure and the PET substrate, and finally achieves overall good interaction. On the basis of various performances meeting the requirements, the oxidation speed of the metal layer is slow. The pressure-sensitive adhesive layer formed by the polyacrylic acid pressure-sensitive adhesive and the protective layer formed by the hydroxyl-containing polyurethane, together with other layer structures, can achieve the product having the characteristic that the metal layer will not be oxidized after 10 years, thereby making the product have good infrared blocking effect and long-term stability.

[0095] The present invention also provides a method for preparing the oxidation-resistant film described in the above technical solution, comprising the following steps:

[0096] A first pressure-sensitive adhesive layer, a first PET layer, a metal layer, a protective layer, a second PET layer and an anti-scratch layer are sequentially formed on the release film to obtain an oxidation-resistant film.

[0097] In the present invention, the first pressure-sensitive adhesive layer, the first PET layer, the metal layer, the protective layer, the second PET layer and the anti-scratch layer are the same as those in the above technical solution and are not described in detail herein.

[0098] Regarding the technical solution that the oxidation-resistant film also includes a second pressure-sensitive adhesive layer, this can be achieved by forming the second pressure-sensitive adhesive layer at the corresponding position, and the present invention will not elaborate on this herein.

[0099] In a preferred embodiment of the present invention, the method for preparing the oxidation-resistant film is specifically as follows:

[0100] (1) coating the protective layer on one side of the metal layer of the PET metal (the other side is the first PET layer) by a precision coating device, and curing it in an oven; after curing, compounding the second PET layer;

[0101] (2) coating the first pressure-sensitive adhesive layer on the first PET layer of (1) by a precision coating device, and then curing the layer to form a release film;

[0102] (3) coating the anti-scratch layer on the second PET layer of (2) by a precision coating device to prepare a finished product;

[0103] (4) The product obtained in step (3) is cured in a constant temperature chamber.

[0104] In another preferred embodiment of the present invention, the method for preparing the oxidation resistant film is specifically as follows:

[0105] (1) coating the protective layer on one side of the metal layer of the PET metal (the other side is the first PET layer) by a precision coating device, and curing it in an oven;

[0106] (2) coating the second pressure-sensitive adhesive layer on the protective layer of (1) by a precision coating device, and compounding the second PET layer after curing;

[0107] (3) coating the anti-scratch layer on the second PET layer of (2) by a precision coating device to prepare a semi-finished product;

[0108] (4) coating the first pressure-sensitive adhesive layer on the first PET layer of (3) by a precision coating device, and then curing and compounding the release film;

[0109] (5) The product obtained in step (4) is cured in a constant temperature chamber.

[0110] In the present invention, the curing temperature is preferably 80°C to 150°C, and the time is preferably 3 min to 6 min; the aging temperature is preferably 25°C to 75°C, and the time is preferably 24 h to 120 h.

[0111] The preparation method provided by the present invention can ensure that each layer has a high interlayer bonding force, so that interlayer separation does not occur, and the process is simple, easy to operate, and suitable for large-scale industrial production.

[0112] The present invention provides an oxidation-resistant film, comprising: a release film; a first pressure-sensitive adhesive layer compounded on the release film; a first PET layer compounded on the first pressure-sensitive adhesive layer; a metal layer compounded on the first PET layer; a protective layer compounded on the metal layer; a second PET layer compounded on the protective layer; an anti-scratch layer compounded on the second PET layer; the protective layer is formed by a composite film adhesive; the composite film adhesive is a main agent and a curing agent in a mass ratio of 100: (1-3) diluted with ethyl acetate to form a 10wt%-30wt% solution; the main agent is a hydroxyl-containing polyurethane; the curing agent is an ethyl acetate solution of 70wt%-80wt% of TMP-TDI adduct. Compared with the prior art, the oxidation-resistant film provided by the present invention adopts a specific layer structure and connection relationship to achieve overall good interaction. On the basis of meeting the requirements of various performances, the metal layer has a slow oxidation rate, so that the product has a good infrared blocking effect and long-term stability.

[0113] In addition, the preparation method provided by the present invention can ensure that each layer has a high interlayer bonding force, so that interlayer separation does not occur, and the process is simple, easy to operate, and suitable for large-scale industrial production.

[0114] In order to further illustrate the present invention, the following examples are provided for detailed description. The raw materials used in the following examples of the present invention are all commercially available commodities.

[0115] Example 1

[0116] (1) The structural schematic diagram of the oxidation-resistant film provided in Example 1 of the present invention is shown in Figure 2 As shown, it is composed of a release film, a pressure-sensitive adhesive layer (installation adhesive), a PET layer, a metal layer, a protective layer (composite layer), a pressure-sensitive adhesive layer (installation adhesive), a PET layer and an anti-scratch layer which are compounded in sequence; the layer structure and the definition of the components of each layer are shown in the following Table 1, wherein the parts are all by mass.

[0117] Table 1

[0118]

[0119] (2) Preparation method:

[0120] (1) The composite protective layer is coated on one side of the metal layer of the aluminum-coated PET (A70T) (the other side is the first PET layer) by a precision coating device and cured in an oven;

[0121] (2) coating the composite pressure-sensitive adhesive layer on the composite protective layer of (1) by a precision coating device, and then curing and compounding the second PET layer;

[0122] (3) coating the anti-scratch layer on the second PET layer of (2) by a precision coating device to prepare a semi-finished product;

[0123] (4) coating the installation adhesive layer on the first PET layer of (3) by a precision coating device, and then curing and compounding the release film;

[0124] (5) The product obtained in step (4) is cured in a constant temperature chamber.

[0125] The curing temperature in the above steps (1), (2) and (4) is 110-120°C, and the curing time is 4-5 minutes; the aging temperature in the above step (5) is 50°C, and the aging time is 72 hours.

[0126] Example 2

[0127] (1) The structural schematic diagram of the oxidation-resistant film provided in Example 2 of the present invention is shown in Figure 3As shown, it is composed of a release film, a pressure-sensitive adhesive layer (installation adhesive), a PET layer, a metal layer, a protective layer (composite layer), a PET layer and an anti-scratch layer which are compounded in sequence; the layer structure and the component limitations of each layer are shown in the following Table 2.

[0128] Table 2

[0129]

[0130] (2) Preparation method:

[0131] (1) coating the composite protective layer on one side of the metal layer of the aluminum-coated PET (A70T) (the other side is the first PET layer) by a precision coating device, and curing it in an oven; after curing, compounding the second PET layer;

[0132] (2) coating the mounting adhesive layer on the first PET layer of (1) by a precision coating device, and then compounding the release film after curing;

[0133] (3) coating the anti-scratch layer on the second PET layer of (2) by a precision coating device to prepare a finished product;

[0134] (4) The product obtained in step (3) is cured in a constant temperature chamber.

[0135] The curing temperature in the above steps (1) and (2) is 110-120°C, and the curing time is 4-5 minutes; the aging temperature in the above step (4) is 50°C, and the aging time is 72 hours.

[0136] Comparative Example 1

[0137] The only difference from Example 1 is that there is no composite protective layer and only one PET layer, the mounting adhesive layer is composited on the metal layer side of the aluminized PET (A70T), and the anti-scratch layer is composited on the PET layer side. Figure 4 shown.

[0138] Comparative Example 2

[0139] The only difference from Example 1 is that there is no composite protective layer (see Figure 1 as shown).

[0140] The oxidation-resistant films provided in the above-mentioned Examples 1-2 and the products provided in the comparative examples were subjected to various performance tests. The results are shown in Tables 3-4 below, wherein Table 3 is the basic performance data of the products, and Table 4 is the oxidation resistance performance data of the products.

[0141] Table 3

[0142]

[0143] Table 4

[0144]

[0145] Note: VLT: visible light transmittance, IRC: 1400nm infrared rejection.

[0146] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An oxidation-resistant film comprising: Release film; A first pressure-sensitive adhesive layer composited on the release film; a first PET layer compounded on the first pressure-sensitive adhesive layer; A metal layer composited on the first PET layer; A protective layer composited on the metal layer; A second PET layer composited on the protective layer; an anti-scratch layer compounded on the second PET layer; The protective layer is formed by a composite film adhesive; the composite film adhesive is a main agent and a curing agent in a mass ratio of 100: (1-3) diluted with ethyl acetate to form a 10wt%-30wt% solution; The main agent is a hydroxyl-containing polyurethane; the curing agent is an ethyl acetate solution containing 70wt% to 80wt% of a TMP-TDI adduct.

2. The oxidation-resistant film according to claim 1, characterized in that: The thickness of the release film is 19 μm to 50 μm.

3. The oxidation-resistant film according to claim 1, characterized in that: The first pressure-sensitive adhesive layer is formed by polyacrylic acid pressure-sensitive adhesive; the polyacrylic acid pressure-sensitive adhesive comprises: 8063 20 parts by weight to 70 parts by weight; EA 40 to 80 parts by weight; T-571 0.5 to 2 parts by weight.

4. The oxidation-resistant film according to claim 1, characterized in that: The thickness of the first pressure-sensitive adhesive layer is 5 μm to 20 μm.

5. The oxidation-resistant film according to claim 1, characterized in that: The thickness of the first PET layer is 12 μm to 188 μm.

6. The oxidation resistant film according to claim 1, characterized in that: The material of the metal layer includes one or more of aluminum, gold, platinum, silver, copper, stainless steel, and TiN.

7. The oxidation resistant film according to claim 1, characterized in that: The thickness of the protective layer is 2 μm to 11 μm.

8. The oxidation resistant film according to claim 1, characterized in that: The anti-scratch layer is a polyacrylate coating; the polyacrylate coating is composed of BR100 and EA, wherein the content of BR100 is 15wt%~50wt%; The anti-scratch layer has a thickness of 1 μm to 3 μm.

9. The oxidation-resistant film according to any one of claims 1 to 8, characterized in that: Also includes: a second pressure-sensitive adhesive layer; The second pressure-sensitive adhesive layer is compounded between the protective layer and the second PET layer.

10. A method for preparing an oxidation-resistant film according to any one of claims 1 to 8, comprising the following steps: A first pressure-sensitive adhesive layer, a first PET layer, a metal layer, a protective layer, a second PET layer and an anti-scratch layer are sequentially formed on the release film to obtain an oxidation-resistant film.

Images