Antioxidant acid-absorbing EVA photovoltaic film and preparation method thereof

Abstract

The invention discloses an anti-oxidation acid-absorbing EVA photovoltaic film and a preparation method thereof.The anti-oxidation acid-absorbing EVA photovoltaic film comprises an EVA photovoltaic film body, the EVA photovoltaic film body comprises an anti-oxidation film, an acid-absorbing film, a photovoltaic base film and a color-stabilizing film, and the anti-oxidation film comprises 30-45 parts of nano zinc oxide dispersion liquid, 20-35 parts of nano silicon dioxide and 20-40 parts of an SF-based film; the acid-absorbing film comprises 25-35 parts of a polypropylene film, 25-35 parts of an alkaline metal compound, 25-35 parts of a modified acid-absorbing agent and 10-30 parts of nano magnesium oxide, and the photovoltaic base film comprises 50-70 parts of an ethylene-vinyl acetate copolymer, 20-35 parts of a modified polyurethane elastomer, 10-15 parts of a silane coupling agent, 0-5 parts of a peroxide cross-linking agent and 0-5 parts of a water vapor blocking agent. By arranging the acid absorbing film, the polypropylene film, the alkaline metal compound and the modified acid absorbing agent, acidic substances released after degradation after aging are subjected to a neutralization reaction, and the situation that the service life of equipment at the installation position is affected due to acidic corrosion is avoided.

Description

Technical Field

[0001] This invention relates to the field of EVA photovoltaic film technology, specifically to an antioxidant and acid-absorbing EVA photovoltaic film and its preparation method. Background Technology

[0002] EVA photovoltaic film is a widely used building material with many advantages. First, EVA photovoltaic film is very easy to process, possessing not only good flexibility and heat resistance, but also excellent adhesion and sealing properties, making it easy to install and use. Second, EVA photovoltaic film can operate independently without the support of an external power source, thus exhibiting green, environmentally friendly, safe, and reliable characteristics. Furthermore, EVA photovoltaic film also has a highly efficient photoelectric conversion function, directly converting sunlight into electrical energy, making it suitable for solar photovoltaic power generation systems. This is of great significance for saving energy, protecting the environment, and reducing carbon emissions.

[0003] In addition, EVA photovoltaic film has a long lifespan and excellent anti-oxidation and weather resistance, effectively preventing erosion from adverse environmental factors such as ultraviolet rays and acid rain, ensuring long-term performance. Furthermore, EVA photovoltaic film has a certain self-cleaning function, is not prone to dust accumulation and discoloration, and can reduce cleaning and maintenance costs. It is worth mentioning that EVA photovoltaic film has good light transmittance, achieving good light transmittance, which not only reduces the impact on the building's appearance but also improves indoor lighting brightness, achieving better comfort. At the same time, EVA photovoltaic film also has a certain heat insulation performance, effectively reducing the internal temperature of the building in summer, reducing energy consumption, improving the efficiency of indoor air conditioning, and avoiding large temperature differences between the inside and outside of the building in winter.

[0004] In summary, the advantages of EVA photovoltaic film are mainly reflected in its ease of processing, independent operation, high-efficiency photoelectric conversion, long lifespan, self-cleaning, good light transmittance, and heat insulation performance. It also possesses important characteristics such as being environmentally friendly and safe. With continuous technological advancements, the application fields of EVA photovoltaic film will become increasingly widespread. It is believed that EVA photovoltaic film will play an even greater role in future building materials, bringing a better life to people.

[0005] However, traditional EVA photovoltaic films have the following drawbacks:

[0006] Due to its structural characteristics, traditional EVA photovoltaic film is prone to degradation and release of acidic substances after aging. The release of acidic substances comes into contact with the EVA photovoltaic film bonding area, causing an acid corrosion reaction and affecting the normal use of the equipment at the bonding area. Summary of the Invention

[0007] The purpose of this invention is to provide an antioxidant and acid-absorbing EVA photovoltaic film and its preparation method, in order to solve the problem mentioned in the background art that traditional EVA photovoltaic films, due to their structural characteristics, are prone to degradation and release of acidic substances after aging. The release of acidic substances comes into contact with the EVA photovoltaic film bonding area, causing an acid corrosion reaction and affecting the normal use of the equipment at the bonding area.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an antioxidant and acid-absorbing EVA photovoltaic film, comprising an EVA photovoltaic film body, wherein the EVA photovoltaic film body comprises an antioxidant film, an acid-absorbing film, a photovoltaic base film, and a color-stabilizing film, wherein the antioxidant film is composed of the following components: by weight, 30-45 parts of nano-zinc oxide dispersion, 20-35 parts of nano-silica, and 20-40 parts of SF-based film; wherein the acid-absorbing film is composed of the following components: by weight, 25-35 parts of polypropylene film, and alkaline metal compounds... The photovoltaic base film is composed of the following components: by weight, 50-70 parts of ethylene-vinyl acetate copolymer, 20-35 parts of modified polyurethane elastomer, 10-15 parts of silane coupling agent, 0-5 parts of peroxide crosslinking agent, and 0-5 parts of water vapor barrier agent. The color-stabilizing film is composed of the following components: by weight, 30-40 parts of titanium dioxide, 30-40 parts of ultraviolet absorber, and 30-40 parts of non-colored fuel.

[0009] As a preferred embodiment of the present invention, the antioxidant film is composed of the following components: by weight, 30 parts of nano zinc oxide dispersion, 30 parts of nano silica, and 40 parts of SF-based film; the acid-absorbing film is composed of the following components: by weight, 25 parts of polypropylene film, 25 parts of alkaline metal compound, 25 parts of modified acid absorber, and 25 parts of nano magnesium oxide; the photovoltaic base film is composed of the following components: by weight, 60 parts of ethylene-vinyl acetate copolymer, 20 parts of modified polyurethane elastomer, 10 parts of silane coupling agent, 5 parts of peroxide crosslinking agent, and 5 parts of water vapor barrier agent; the color-stabilizing film is composed of the following components: by weight, 33 parts of titanium dioxide, 33 parts of ultraviolet absorber, and 34 parts of colored fuel.

[0010] As a preferred embodiment of the present invention, the antioxidant film is made of the following components: by weight, 35 parts of nano zinc oxide dispersion, 25 parts of nano silica, and 40 parts of SF-based film; the acid-absorbing film is made of the following components: by weight, 25 parts of polypropylene film, 25 parts of alkaline metal compound, 35 parts of modified acid absorber, and 15 parts of nano magnesium oxide; the photovoltaic base film is made of the following components: by weight, 50 parts of ethylene-vinyl acetate copolymer, 25 parts of modified polyurethane elastomer, 15 parts of silane coupling agent, 5 parts of peroxide crosslinking agent, and 5 parts of water vapor barrier agent; the color-stabilizing film is made of the following components: by weight, 30 parts of titanium dioxide, 40 parts of ultraviolet absorber, and 30 parts of colored fuel.

[0011] As a preferred embodiment of the present invention, the antioxidant film is composed of the following components: by weight, 40 parts of nano zinc oxide dispersion, 30 parts of nano silica, and 30 parts of SF-based film; the acid-absorbing film is composed of the following components: by weight, 26 parts of polypropylene film, 26 parts of alkaline metal compound, 27 parts of modified acid absorber, and 21 parts of nano magnesium oxide; the photovoltaic base film is composed of the following components: by weight, 55 parts of ethylene-vinyl acetate copolymer, 25 parts of modified polyurethane elastomer, 10 parts of silane coupling agent, 5 parts of peroxide crosslinking agent, and 5 parts of water vapor barrier agent; the color-stabilizing film is composed of the following components: by weight, 30 parts of titanium dioxide, 30 parts of ultraviolet absorber, and 40 parts of colored fuel.

[0012] As a preferred embodiment of the present invention, the antioxidant film is composed of the following components: by weight, 41 parts of nano zinc oxide dispersion, 34 parts of nano silica, and 25 parts of SF-based film; the acid-absorbing film is composed of the following components: by weight, 30 parts of polypropylene film, 25-35 parts of alkaline metal compound, 25 parts of modified acid absorber, and 20 parts of nano magnesium oxide; the photovoltaic base film is composed of the following components: by weight, 55 parts of ethylene-vinyl acetate copolymer, 23 parts of modified polyurethane elastomer, 12 parts of silane coupling agent, 5 parts of peroxide crosslinking agent, and 5 parts of water vapor barrier agent; the color-stabilizing film is composed of the following components: by weight, 40 parts of titanium dioxide, 30 parts of ultraviolet absorber, and 30 parts of colored fuel.

[0013] As a preferred embodiment of the present invention, the alkaline metal compound is one or more of magnesium hydroxide, aluminum hydroxide, zinc oxide, zinc stearate, basic magnesium carbonate, basic aluminum carbonate, and zirconium hydrogen phosphate.

[0014] As a preferred embodiment of the present invention, the modified acid absorbent is one or more of sodium stearate, calcium stearate, and sodium oleate.

[0015] This invention discloses a method for preparing an antioxidant and acid-absorbing EVA photovoltaic film, comprising the following steps:

[0016] Step 1: Preparation of antioxidant film: Weigh 30-45 parts of nano zinc oxide dispersion, 20-35 parts of nano silica and 20-40 parts of SF-based film according to the weight ratio, mix them, put the mixture into an extruder for compounding and plasticizing, and the extrudate is processed through embossing, cooling, traction and winding to obtain antioxidant film.

[0017] Step 2: Preparation of acid-absorbing film: Weigh 25-35 parts of polypropylene film, 25-35 parts of alkali metal compound, 25-35 parts of modified acid absorber and 10-30 parts of nano magnesium oxide according to the weight ratio, mix them, put the mixture into an extruder for compounding and plasticizing, and the extrudate is processed through embossing, cooling, traction and winding to obtain acid-absorbing film.

[0018] Step 3: Preparation of photovoltaic base film: Weigh 50-70 parts of ethylene-vinyl acetate copolymer, 20-35 parts of modified polyurethane elastomer, 10-15 parts of silane coupling agent, 0-5 parts of peroxide crosslinking agent and 0-5 parts of water vapor barrier agent according to the weight ratio, mix them, put the mixture into an extruder for compounding and plasticizing, and the extrudate is processed by embossing, cooling, traction and winding to obtain photovoltaic base film;

[0019] Step 4: Preparation of color-stabilized film: Weigh 30-40 parts of titanium dioxide, 30-40 parts of ultraviolet absorber and 30-40 parts of colored dye according to the weight ratio, mix them, put the mixture into an extruder for compounding and plasticizing, and the extrudate is processed through embossing, cooling, traction and winding to obtain color-stabilized film.

[0020] Step 5: Film bonding: The prepared antioxidant film, acid-absorbing film, photovoltaic base film and color-stabilizing film are bonded together and then cured to form the EVA photovoltaic film body.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. By setting an antioxidant film, the nano zinc oxide dispersion enhances the antioxidant performance of the film, slows down the oxidation rate of the film, and extends its service life. Silica nano is a nanomaterial with high hydrophilicity, transparency and chemical stability. Adding an appropriate amount of silica nanomaterial effectively enhances the antioxidant capacity of the film, giving it a longer service life and improving its antioxidant protection for equipment.

[0023] 2. By setting up an acid-absorbing membrane, the polypropylene membrane is corrosion-resistant and lightweight, but has a small liquid absorption capacity, making it suitable for absorbing small amounts of acid etchants. One or more alkaline metal compounds, such as magnesium hydroxide, aluminum hydroxide, zinc oxide, zinc stearate, basic magnesium carbonate, basic aluminum carbonate, and zirconium hydrogen phosphate, neutralize the acid upon contact with the acid. The modified acid absorbent, such as sodium stearate, calcium stearate, and sodium oleate, neutralizes the acidic substances, resulting in a smooth and flat membrane surface. It neutralizes the acidic substances released during aging degradation, preventing acid corrosion of the equipment at the installation site from affecting its service life. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the EVA photovoltaic film body of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the antioxidant film of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the acid-absorbing film of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of the color-stabilizing film of the present invention;

[0028] Figure 5 This is a flowchart of the present invention.

[0029] In the figure: 1. EVA photovoltaic film body; 2. Antioxidant film; 3. Acid-absorbing film; 4. Photovoltaic base film; 5. Color-stabilizing film. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1:

[0032] Please see Figure 1-5This invention provides an antioxidant and acid-absorbing EVA photovoltaic film, comprising an EVA photovoltaic film body 1, which includes an antioxidant film 2, an acid-absorbing film 3, a photovoltaic base film 4, and a color-stabilizing film 5. The antioxidant film 2 is composed of the following components: by weight, 30-45 parts of nano-zinc oxide dispersion, 20-35 parts of nano-silica, and 20-40 parts of SF-based film. The acid-absorbing film 3 is composed of the following components: by weight, 25-35 parts of polypropylene film, 25 parts of alkali metal compound, and... The photovoltaic base film 4 is made of the following components: by weight, 50-70 parts of ethylene-vinyl acetate copolymer, 20-35 parts of modified polyurethane elastomer, 10-15 parts of silane coupling agent, 0-5 parts of peroxide crosslinking agent, and 0-5 parts of water vapor barrier agent. The color-stabilizing film 5 is made of the following components: by weight, 30-40 parts of titanium dioxide, 30-40 parts of ultraviolet absorber, and 30-40 parts of non-colored fuel.

[0033] The alkaline metal compound is one or more of magnesium hydroxide, aluminum hydroxide, zinc oxide, zinc stearate, basic magnesium carbonate, basic aluminum carbonate, and zirconium hydrogen phosphate.

[0034] The modified acid absorber is one or more of sodium stearate, calcium stearate, and sodium oleate.

[0035] This invention discloses a method for preparing an antioxidant and acid-absorbing EVA photovoltaic film, comprising the following steps:

[0036] Step 1: Preparation of antioxidant film 2: Weigh 30-45 parts of nano zinc oxide dispersion, 20-35 parts of silicon dioxide nano and 20-40 parts of SF-based film according to the weight ratio, mix them, put the mixture into an extruder for compounding and plasticizing, and the extrudate is processed by embossing, cooling, traction and winding to obtain antioxidant film 2.

[0037] Step 2: Preparation of acid-absorbing film 3: Weigh 25-35 parts of polypropylene film, 25-35 parts of alkali metal compound, 25-35 parts of modified acid absorber and 10-30 parts of nano magnesium oxide according to the weight ratio, mix them, put the mixture into an extruder for compounding and plasticizing, and the extrudate is processed through embossing, cooling, traction and winding to obtain acid-absorbing film 3.

[0038] Step 3: Preparation of photovoltaic base film 4: Weigh 50-70 parts of ethylene-vinyl acetate copolymer, 20-35 parts of modified polyurethane elastomer, 10-15 parts of silane coupling agent, 0-5 parts of peroxide crosslinking agent and 0-5 parts of water vapor barrier agent according to the weight ratio, mix them, put the mixture into an extruder for compounding and plasticizing, and the extrudate is processed by embossing, cooling, traction and winding to obtain photovoltaic base film 4;

[0039] Step 4: Preparation of color-stabilized film 5: Weigh 30-40 parts of titanium dioxide, 30-40 parts of ultraviolet absorber and 30-40 parts of colored fuel according to the weight ratio, mix them, put the mixture into an extruder for mixing and plasticizing, and the extrudate is processed through embossing, cooling, traction and winding to obtain color-stabilized film 5.

[0040] Step 5, film bonding: The prepared antioxidant film 2, acid-absorbing film 3, photovoltaic base film 4 and color-stabilizing film 5 are bonded together and then cured to form the EVA photovoltaic film body 1.

[0041] Example 2:

[0042] Please see Figure 1-5 This invention provides an antioxidant and acid-absorbing EVA photovoltaic film, comprising an EVA photovoltaic film body 1, which includes an antioxidant film 2, an acid-absorbing film 3, a photovoltaic base film 4, and a color-stabilizing film 5. The antioxidant film 2 is composed of the following components: by weight, 30 parts of nano zinc oxide dispersion, 30 parts of nano silica, and 40 parts of SF-based film. The acid-absorbing film 3 is composed of the following components: by weight, 25 parts of polypropylene film, 25 parts of alkaline metal compound, 25 parts of modified acid absorber, and 25 parts of nano magnesium oxide. The photovoltaic base film 4 is composed of the following components: by weight, 60 parts of ethylene-vinyl acetate copolymer, 20 parts of modified polyurethane elastomer, 10 parts of silane coupling agent, 5 parts of peroxide crosslinking agent, and 5 parts of water vapor barrier agent. The color-stabilizing film 5 is composed of the following components: by weight, 33 parts of titanium dioxide, 33 parts of ultraviolet absorber, and 34 parts of colored dye.

[0043] The alkaline metal compound is one or more of magnesium hydroxide, aluminum hydroxide, zinc oxide, zinc stearate, basic magnesium carbonate, basic aluminum carbonate, and zirconium hydrogen phosphate.

[0044] The modified acid absorber is one or more of sodium stearate, calcium stearate, and sodium oleate.

[0045] This invention discloses a method for preparing an antioxidant and acid-absorbing EVA photovoltaic film, comprising the following steps:

[0046] Step 1: Preparation of antioxidant film 2: Weigh 30 parts of nano zinc oxide dispersion, 30 parts of silicon dioxide nano and 40 parts of SF-based film according to the weight ratio, mix them, put the mixture into an extruder for compounding and plasticizing, and the extrudate is processed by embossing, cooling, traction and winding to obtain antioxidant film 2.

[0047] Step 2: Preparation of acid-absorbing film 3: Weigh 25 parts of polypropylene film, 25 parts of alkaline metal compound, 25 parts of modified acid absorber and 25 parts of nano magnesium oxide according to the weight ratio, mix them, put the mixture into an extruder for mixing and plasticizing, and the extrudate is processed through embossing, cooling, traction and winding to obtain acid-absorbing film 3.

[0048] Step 3: Preparation of photovoltaic base film 4: Weigh 60 parts of ethylene-vinyl acetate copolymer, 20 parts of modified polyurethane elastomer, 10 parts of silane coupling agent, 5 parts of peroxide crosslinking agent and 5 parts of water vapor barrier agent according to the weight ratio, mix them, put the mixture into an extruder for compounding and plasticizing, and the extrudate is processed through embossing, cooling, traction and winding to obtain photovoltaic base film 4.

[0049] Step 4: Preparation of color-stabilized film 5: Weigh 33 parts of titanium dioxide, 33 parts of ultraviolet absorber and 34 parts of colored fuel according to the weight ratio, mix them, put the mixture into an extruder for compounding and plasticizing, and the extrudate is processed through embossing, cooling, traction and winding to obtain color-stabilized film 5.

[0050] Step 5, film bonding: The prepared antioxidant film 2, acid-absorbing film 3, photovoltaic base film 4 and color-stabilizing film 5 are bonded together and then cured to form the EVA photovoltaic film body 1.

[0051] Example 3:

[0052] Please see Figure 1-5 This invention provides an antioxidant and acid-absorbing EVA photovoltaic film, comprising an EVA photovoltaic film body 1, which includes an antioxidant film 2, an acid-absorbing film 3, a photovoltaic base film 4, and a color-stabilizing film 5. The antioxidant film 2 is composed of the following components: by weight, 35 parts of nano zinc oxide dispersion, 25 parts of nano silica, and 40 parts of SF-based film. The acid-absorbing film 3 is composed of the following components: by weight, 25 parts of polypropylene film, 25 parts of alkaline metal compound, 35 parts of modified acid absorber, and 15 parts of nano magnesium oxide. The photovoltaic base film 4 is composed of the following components: by weight, 50 parts of ethylene-vinyl acetate copolymer, 25 parts of modified polyurethane elastomer, 15 parts of silane coupling agent, 5 parts of peroxide crosslinking agent, and 5 parts of water vapor barrier agent. The color-stabilizing film 5 is composed of the following components: by weight, 30 parts of titanium dioxide, 40 parts of ultraviolet absorber, and 30 parts of colored dye.

[0053] The alkaline metal compound is one or more of magnesium hydroxide, aluminum hydroxide, zinc oxide, zinc stearate, basic magnesium carbonate, basic aluminum carbonate, and zirconium hydrogen phosphate.

[0054] The modified acid absorber is one or more of sodium stearate, calcium stearate, and sodium oleate.

[0055] This invention discloses a method for preparing an antioxidant and acid-absorbing EVA photovoltaic film, comprising the following steps:

[0056] Step 1: Preparation of antioxidant film 2: Weigh 35 parts of nano zinc oxide dispersion, 25 parts of silicon dioxide nano and 40 parts of SF-based film according to the weight ratio, mix them, put the mixture into an extruder for compounding and plasticizing, and the extrudate is processed by embossing, cooling, traction and winding to obtain antioxidant film 2.

[0057] Step 2: Preparation of acid-absorbing film 3: Weigh 25 parts of polypropylene film, 25 parts of alkaline metal compound, 35 parts of modified acid absorber and 15 parts of nano magnesium oxide according to the weight ratio, mix them, put the mixture into an extruder for mixing and plasticizing, and the extrudate is processed by embossing, cooling, traction and winding to obtain acid-absorbing film 3.

[0058] Step 3: Preparation of photovoltaic base film 4: Weigh 50 parts of ethylene-vinyl acetate copolymer, 25 parts of modified polyurethane elastomer, 15 parts of silane coupling agent, 5 parts of peroxide crosslinking agent and 5 parts of water vapor barrier agent according to the weight ratio, mix them, put the mixture into an extruder for compounding and plasticizing, and the extrudate is processed through embossing, cooling, traction and winding to obtain photovoltaic base film 4.

[0059] Step 4: Preparation of color-stabilizing film 5: Weigh 30 parts of titanium dioxide, 40 parts of ultraviolet absorber and 30 parts of colored fuel according to the weight ratio, mix them, put the mixture into an extruder for compounding and plasticizing, and the extrudate is processed through embossing, cooling, traction and winding to obtain color-stabilizing film 5.

[0060] Step 5, film bonding: The prepared antioxidant film 2, acid-absorbing film 3, photovoltaic base film 4 and color-stabilizing film 5 are bonded together and then cured to form the EVA photovoltaic film body 1.

[0061] Example 4:

[0062] Please see Figure 1-5This invention provides an antioxidant and acid-absorbing EVA photovoltaic film, comprising an EVA photovoltaic film body 1, which includes an antioxidant film 2, an acid-absorbing film 3, a photovoltaic base film 4, and a color-stabilizing film 5. The antioxidant film 2 is composed of the following components: by weight, 40 parts of nano zinc oxide dispersion, 30 parts of nano silica, and 30 parts of SF-based film. The acid-absorbing film 3 is composed of the following components: by weight, 26 parts of polypropylene film, 26 parts of alkaline metal compound, 27 parts of modified acid absorber, and 21 parts of nano magnesium oxide. The photovoltaic base film 4 is composed of the following components: by weight, 55 parts of ethylene-vinyl acetate copolymer, 25 parts of modified polyurethane elastomer, 10 parts of silane coupling agent, 5 parts of peroxide crosslinking agent, and 5 parts of water vapor barrier agent. The color-stabilizing film 5 is composed of the following components: by weight, 30 parts of titanium dioxide, 30 parts of ultraviolet absorber, and 40 parts of colored dye.

[0063] The alkaline metal compound is one or more of magnesium hydroxide, aluminum hydroxide, zinc oxide, zinc stearate, basic magnesium carbonate, basic aluminum carbonate, and zirconium hydrogen phosphate.

[0064] The modified acid absorber is one or more of sodium stearate, calcium stearate, and sodium oleate.

[0065] This invention discloses a method for preparing an antioxidant and acid-absorbing EVA photovoltaic film, comprising the following steps:

[0066] Step 1: Preparation of antioxidant film 2: Weigh 40 parts of nano zinc oxide dispersion, 30 parts of silicon dioxide nano and 30 parts of SF-based film according to the weight ratio, mix them, put the mixture into an extruder for compounding and plasticizing, and the extrudate is processed through embossing, cooling, traction and winding to obtain antioxidant film 2.

[0067] Step 2: Preparation of acid-absorbing film 3: Weigh 26 parts of polypropylene film, 26 parts of alkaline metal compound, 27 parts of modified acid absorber and 21 parts of nano magnesium oxide according to the weight ratio, mix them, put the mixture into an extruder for mixing and plasticizing, and the extrudate is processed by embossing, cooling, traction and winding to obtain acid-absorbing film 3.

[0068] Step 3: Preparation of photovoltaic base film 4: Weigh 55 parts of ethylene-vinyl acetate copolymer, 25 parts of modified polyurethane elastomer, 10 parts of silane coupling agent, 5 parts of peroxide crosslinking agent and 5 parts of water vapor barrier agent according to the weight ratio, mix them, put the mixture into an extruder for compounding and plasticizing, and the extrudate is processed through embossing, cooling, traction and winding to obtain photovoltaic base film 4.

[0069] Step 4: Preparation of color-stabilizing film 5: Weigh 30 parts of titanium dioxide, 30 parts of ultraviolet absorber and 40 parts of colored fuel according to the weight ratio, mix them, put the mixture into an extruder for compounding and plasticizing, and the extrudate is processed through embossing, cooling, traction and winding to obtain color-stabilizing film 5.

[0070] Step 5, film bonding: The prepared antioxidant film 2, acid-absorbing film 3, photovoltaic base film 4 and color-stabilizing film 5 are bonded together and then cured to form the EVA photovoltaic film body 1.

[0071] Example 5:

[0072] Please see Figure 1-5 This invention provides an antioxidant and acid-absorbing EVA photovoltaic film, comprising an EVA photovoltaic film body 1, which includes an antioxidant film 2, an acid-absorbing film 3, a photovoltaic base film 4, and a color-stabilizing film 5. The antioxidant film 2 is composed of the following components: by weight, 41 parts of nano zinc oxide dispersion, 34 parts of nano silica, and 25 parts of SF-based film. The acid-absorbing film 3 is composed of the following components: by weight, 30 parts of polypropylene film, 25-35 parts of alkaline metal compound, 25 parts of modified acid absorber, and 20 parts of nano magnesium oxide. The photovoltaic base film 4 is composed of the following components: by weight, 55 parts of ethylene-vinyl acetate copolymer, 23 parts of modified polyurethane elastomer, 12 parts of silane coupling agent, 5 parts of peroxide crosslinking agent, and 5 parts of water vapor barrier agent. The color-stabilizing film 5 is composed of the following components: by weight, 40 parts of titanium dioxide, 30 parts of ultraviolet absorber, and 30 parts of colored dye.

[0073] The alkaline metal compound is one or more of magnesium hydroxide, aluminum hydroxide, zinc oxide, zinc stearate, basic magnesium carbonate, basic aluminum carbonate, and zirconium hydrogen phosphate.

[0074] The modified acid absorber is one or more of sodium stearate, calcium stearate, and sodium oleate.

[0075] This invention discloses a method for preparing an antioxidant and acid-absorbing EVA photovoltaic film, comprising the following steps:

[0076] Step 1: Preparation of antioxidant film 2: Weigh 41 parts of nano zinc oxide dispersion, 34 parts of nano silica and 25 parts of SF-based film according to the weight ratio, mix them, put the mixture into an extruder for compounding and plasticizing, and the extrudate is processed through embossing, cooling, traction and winding to obtain antioxidant film 2.

[0077] Step 2: Preparation of acid-absorbing film 3: Weigh 30 parts of polypropylene film, 25-35 parts of alkali metal compound, 25 parts of modified acid absorber and 20 parts of nano magnesium oxide according to the weight ratio, mix them, put the mixture into an extruder for mixing and plasticizing, and the extrudate is processed through embossing, cooling, traction and winding to obtain acid-absorbing film 3.

[0078] Step 3: Preparation of photovoltaic base film 4: Weigh 55 parts of ethylene-vinyl acetate copolymer, 23 parts of modified polyurethane elastomer, 12 parts of silane coupling agent, 5 parts of peroxide crosslinking agent and 5 parts of water vapor barrier agent according to the weight ratio, mix them, put the mixture into an extruder for compounding and plasticizing, and the extrudate is processed by embossing, cooling, traction and winding to obtain photovoltaic base film 4.

[0079] Step 4: Preparation of color-stabilized film 5: Weigh 40 parts of titanium dioxide, 30 parts of ultraviolet absorber and 30 parts of colored fuel according to the weight ratio, mix them, put the mixture into an extruder for compounding and plasticizing, and the extrudate is processed through embossing, cooling, traction and winding to obtain color-stabilized film 5.

[0080] Step 5, film bonding: The prepared antioxidant film 2, acid-absorbing film 3, photovoltaic base film 4 and color-stabilizing film 5 are bonded together and then cured to form the EVA photovoltaic film body 1.

[0081] In this invention, 30-45 parts by weight of nano zinc oxide dispersion, 20-35 parts by weight of nano silica, and 20-40 parts by weight of SF-based film are weighed and mixed. The mixture is then fed into an extruder for compounding and plasticizing. The extrudate is then subjected to embossing, cooling, traction, and winding processes to obtain an antioxidant film 2. 25-35 parts by weight of polypropylene film, 25-35 parts by weight of alkali metal compound, 25-35 parts by weight of modified acid absorber, and 10-30 parts by weight of nano magnesium oxide are weighed and mixed. The mixture is then fed into an extruder for compounding and plasticizing. The extrudate is then subjected to embossing, cooling, traction, and winding processes to obtain an acid absorbent film 3. 50-70 parts by weight of ethylene-vinyl acetate copolymer, modified poly... 20-35 parts of urethane elastomer, 10-15 parts of silane coupling agent, 0-5 parts of peroxide crosslinking agent, and 0-5 parts of water vapor barrier agent are mixed together. The mixture is then fed into an extruder for compounding and plasticizing. The extrudate is then subjected to embossing, cooling, traction, and winding processes to obtain a photovoltaic base film 4. 30-40 parts of titanium dioxide, 30-40 parts of ultraviolet absorber, and 30-40 parts of non-colored fuel are weighed and mixed together. The mixture is then fed into an extruder for compounding and plasticizing. The extrudate is then subjected to embossing, cooling, traction, and winding processes to obtain a color-stabilized film 5. The prepared antioxidant film 2, acid-absorbing film 3, photovoltaic base film 4, and color-stabilized film 5 are then bonded together and cured to form the EVA photovoltaic film body 1.

[0082] In this invention, the nano zinc oxide dispersion enhances the antioxidant properties of the film, slows down the oxidation rate, and extends its service life. Silica nanoparticles are nanomaterials with high hydrophilicity, transparency, and chemical stability. Adding an appropriate amount of silica nanoparticles effectively enhances the antioxidant capacity of the film, giving it a longer service life. SF-based films are washable and biodegradable, and do not cause environmental pollution. Polypropylene films are corrosion-resistant and lightweight, but have a small liquid absorption capacity, making them suitable for absorbing small amounts of acid etchants. One or more alkaline metal compounds, such as magnesium hydroxide, aluminum hydroxide, zinc oxide, zinc stearate, basic magnesium carbonate, basic aluminum carbonate, and zirconium hydrogen phosphate, neutralize the acid upon contact with the acid. The modified acid absorbent, such as sodium stearate, calcium stearate, and sodium oleate, neutralizes the acidic substances and makes the film surface smooth and flat. Nano magnesium oxide acts as a highly efficient air purifier, effectively removing bacteria, viruses, and harmful gases from the air.

[0083] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An antioxidant acid-absorbing EVA photovoltaic film, comprising an EVA photovoltaic film body (1), characterized in that: The EVA photovoltaic film body (1) comprises an oxidation-resistant film (2), an acid-absorbing film (3), a photovoltaic base film (4) and a color-stable film (5), the oxidation-resistant film (2) is made of the following components: 30-45 parts by weight of nano zinc oxide dispersion liquid, 20-35 parts by weight of nano silicon dioxide and 20-40 parts by weight of SF-based film, the acid-absorbing film (3) is made of the following components: 25-35 parts by weight of polypropylene film, 25-35 parts by weight of basic metal compound, 25-35 parts by weight of modified acid-absorbing agent and 10-30 parts by weight of nano magnesium oxide, the photovoltaic base film (4) is made of the following components: 50-70 parts by weight of ethylene-vinyl acetate copolymer, 20-35 parts by weight of modified polyurethane elastomer, 10-15 parts by weight of silane coupling agent, 0-5 parts by weight of peroxide crosslinking agent and 0-5 parts by weight of water vapor barrier agent, and the color-stable film (5) is made of the following components: 30-40 parts by weight of titanium white, 30-40 parts by weight of ultraviolet absorber and 30-40 parts by weight of colored fuel.

2. The antioxidant and acid-absorbing EVA photovoltaic film according to claim 1, characterized in that: The oxidation-resistant film (2) is made of the following components: 30 parts by weight of nano zinc oxide dispersion liquid, 30 parts by weight of nano silicon dioxide and 40 parts by weight of SF-based film, the acid-absorbing film (3) is made of the following components: 25 parts by weight of polypropylene film, 25 parts by weight of basic metal compound, 25 parts by weight of modified acid-absorbing agent and 25 parts by weight of nano magnesium oxide, the photovoltaic base film (4) is made of the following components: 60 parts by weight of ethylene-vinyl acetate copolymer, 20 parts by weight of modified polyurethane elastomer, 10 parts by weight of silane coupling agent, 5 parts by weight of peroxide crosslinking agent and 5 parts by weight of water vapor barrier agent, and the color-stable film (5) is made of the following components: 33 parts by weight of titanium white, 33 parts by weight of ultraviolet absorber and 34 parts by weight of colored fuel.

3. The antioxidant and acid-absorbing EVA photovoltaic film according to claim 1, characterized in that: The oxidation-resistant film (2) is made of the following components: 35 parts by weight of nano zinc oxide dispersion liquid, 25 parts by weight of nano silicon dioxide and 40 parts by weight of SF-based film, the acid-absorbing film (3) is made of the following components: 25 parts by weight of polypropylene film, 25 parts by weight of basic metal compound, 35 parts by weight of modified acid-absorbing agent and 15 parts by weight of nano magnesium oxide, the photovoltaic base film (4) is made of the following components: 50 parts by weight of ethylene-vinyl acetate copolymer, 25 parts by weight of modified polyurethane elastomer, 15 parts by weight of silane coupling agent, 5 parts by weight of peroxide crosslinking agent and 5 parts by weight of water vapor barrier agent, and the color-stable film (5) is made of the following components: 30 parts by weight of titanium white, 40 parts by weight of ultraviolet absorber and 30 parts by weight of colored fuel.

4. The antioxidant and acid-absorbing EVA photovoltaic film according to claim 1, characterized in that: The antioxidant film (2) is made of the following components: 40 parts by weight of nano zinc oxide dispersion, 30 parts by weight of nano silicon dioxide, and 30 parts by weight of SF-based film. The acid-absorbing film (3) is made of the following components: 26 parts by weight of polypropylene film, 26 parts by weight of basic metal compound, 27 parts by weight of modified acid-absorbing agent, and 21 parts by weight of nano magnesium oxide. The photovoltaic base film (4) is made of the following components: 55 parts by weight of ethylene-vinyl acetate copolymer, 25 parts by weight of modified polyurethane elastomer, 10 parts by weight of silane coupling agent, 5 parts by weight of peroxide crosslinking agent, and 5 parts by weight of water vapor barrier agent. The color-stable film (5) is made of the following components: 30 parts by weight of titanium white, 30 parts by weight of ultraviolet absorber, and 40 parts by weight of colored fuel.

5. The antioxidant and acid-absorbing EVA photovoltaic film according to claim 1, characterized in that: The antioxidant film (2) is made of the following components: 41 parts by weight of nano zinc oxide dispersion, 34 parts by weight of nano silicon dioxide, and 25 parts by weight of SF-based film. The acid-absorbing film (3) is made of the following components: 30 parts by weight of polypropylene film, 25-35 parts by weight of basic metal compound, 25 parts by weight of modified acid-absorbing agent, and 20 parts by weight of nano magnesium oxide. The photovoltaic base film (4) is made of the following components: 55 parts by weight of ethylene-vinyl acetate copolymer, 23 parts by weight of modified polyurethane elastomer, 12 parts by weight of silane coupling agent, 5 parts by weight of peroxide crosslinking agent, and 5 parts by weight of water vapor barrier agent. The color-stable film (5) is made of the following components: 40 parts by weight of titanium white, 30 parts by weight of ultraviolet absorber, and 30 parts by weight of colored fuel.

6. The antioxidant and acid-absorbing EVA photovoltaic film according to claim 1, characterized in that: The basic metal compound is one or more of magnesium hydroxide, aluminum hydroxide, zinc oxide, zinc stearate, basic magnesium carbonate, basic aluminum carbonate, and zirconium hydrogen phosphate.

7. The antioxidant and acid-absorbing EVA photovoltaic film according to claim 1, characterized in that: The modified acid-absorbing agent is one or more of sodium stearate, calcium stearate, and sodium oleate.

8. The method for preparing an antioxidant acid-absorbing EVA photovoltaic film according to any one of claims 1-7, characterized in that, The method comprises the following steps: Step one, preparing the antioxidant film (2): 30-45 parts by weight of nano zinc oxide dispersion, 20-35 parts by weight of nano silicon dioxide, and 20-40 parts by weight of SF-based film are weighed and mixed, and then the mixture is fed into an extruder for plasticizing and mixing. The extrudate is subjected to embossing, cooling, traction, and winding to obtain the antioxidant film (2); Step two, preparing the acid-absorbing film (3): 25-35 parts by weight of polypropylene film, 25-35 parts by weight of basic metal compound, 25-35 parts by weight of modified acid-absorbing agent, and 10-30 parts by weight of nano magnesium oxide are mixed, and then the mixture is fed into an extruder for plasticizing and mixing. The extrudate is subjected to embossing, cooling, traction, and winding to obtain the acid-absorbing film (3); Step three, preparing the photovoltaic base film (4): 50-70 parts by weight of ethylene-vinyl acetate copolymer, 20-35 parts by weight of modified polyurethane elastomer, 10-15 parts by weight of silane coupling agent, 0-5 parts by weight of peroxide crosslinking agent, and 0-5 parts by weight of water vapor barrier agent are mixed, and then the mixture is fed into an extruder for plasticizing and mixing. The extrudate is subjected to embossing, cooling, traction, and winding to obtain the photovoltaic base film (4); Step four, preparing color-stable film (5): take titanium dioxide 30-40 parts, ultraviolet absorber 30-40 parts and colored fuel 30-40 parts by weight, mix them together, put the mixture into an extruder for plasticizing and mixing, and then the extrudate is subjected to embossing, cooling, traction and winding processes to obtain the color-stable film (5); Step five, film bonding: the prepared antioxidant film (2), acid-absorbing film (3), photovoltaic base film (4) and color-stable film (5) are bonded together and then cured to form the EVA photovoltaic film body (1).

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