Photovoltaic encapsulant film and method of making same

Abstract

The application discloses a kind of photovoltaic encapsulation adhesive films, the photovoltaic encapsulation adhesive film includes the following raw materials: polymer matrix, initiator, crosslinking agent, coupling agent, antioxidant, ultraviolet absorber, light stabilizer and gel agent.The application also provides a kind of preparation method of photovoltaic encapsulation adhesive film.The photovoltaic encapsulation adhesive film described in the application, by using the raw material formula containing gel agent, so that the prepared photovoltaic encapsulation adhesive film solves the precipitation problem of liquid additive in the use process of photovoltaic encapsulation adhesive film in the prior art, not only improves the process stability and reliability of photovoltaic encapsulation adhesive film, but also prolongs the service life of photovoltaic encapsulation adhesive film.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of photovoltaic materials, in particular to a photovoltaic encapsulant film and a preparation method thereof. BACKGROUND

[0002] As the core material of photovoltaic modules, solar cell encapsulant has become one of the hotspots in the global photovoltaic field. With the amazing growth of solar cell production in China, the research and development of related encapsulants have become increasingly important. Ethylene-vinyl acetate copolymer (EVA) film is the most widely used polymer encapsulant at present, but EVA film has poor weather resistance and is prone to degradation and discoloration during long-term use, which affects the light transmittance and adhesion, and reduces the output efficiency of the module. Polyolefin materials represented by ethylene-alpha-olefin copolymer (POE) have excellent light transmittance, electrical insulation, water vapor barrier, and outstanding weather resistance and PID resistance, and are considered as ideal materials to replace EVA encapsulants. POE has good mechanical properties and low-temperature processing properties due to its narrow molecular weight distribution and short branched chains. On the other hand, POE does not contain unsaturated bonds or groups that are prone to decomposition under the action of light and heat, and exhibits good heat resistance and ultraviolet aging resistance. POE film can be used for the encapsulation of solar single-glass and double-glass modules, and is particularly widely used in double-glass modules. POE film has high water vapor barrier, high visible light transmittance, high volume resistivity, excellent weather resistance, and long-term PID resistance.

[0003] Most of the currently maturely applied additives have poor compatibility with POE, which can cause the following problems: 1. POE particles need a long time to absorb liquid additives through the mixing process, which reduces the overall production efficiency. 2. POE encapsulant film is prone to slipping after processing, which seriously reduces the entire module process; the precipitation of additives seriously reduces the storage and use stability of the encapsulant film, and seriously affects the service life of the module. At present, the general solution to the above problems is to change the film pattern to prevent the film from slipping during the module process, but this does not fundamentally solve the problem of liquid additive precipitation. With the passage of time, the effect of changing the pattern is minimal; secondly, replacing additives with good compatibility with POE can alleviate the problem of liquid precipitation to some extent, but in fact, it sacrifices other properties to some extent, and a large amount of work is needed to complete the reliability evaluation, which may not be worth the effort in the end. SUMMARY

[0004] The present application provides a photovoltaic encapsulant film, which uses a raw material formula containing a gelling agent, thereby solving the problem of liquid additive precipitation in the use of the photovoltaic encapsulant film in the prior art. Not only does it improve the process stability and reliability of the photovoltaic encapsulant film, but also prolongs the service life of the photovoltaic encapsulant film.

[0005] The present application provides a kind of photovoltaic encapsulation adhesive film, wherein the photovoltaic encapsulation adhesive film includes the following raw materials: polymer matrix, initiator, crosslinking agent, coupling agent, antioxidant, ultraviolet absorber, light stabilizer and gel agent.

[0006] Further, the photovoltaic encapsulation adhesive film includes the following raw materials by weight: 100 parts of polymer matrix, 0.2-1 parts of initiator, 0.3-1 parts of crosslinking agent, 0.15-1 parts of coupling agent, 0.05-1 parts of antioxidant, 0.05-1 parts of ultraviolet absorber, 0.05-1 parts of light stabilizer, and 0.1-1 parts of gel agent.

[0007] Further, the gel agent is a reversible gel agent,

[0008] The gelation transition temperature of the gel agent is 50-120℃.

[0009] Further, the gel agent is selected from a small molecule gel agent or a sub-nanowire gel agent.

[0010] Further, the small molecule gel agent is selected from one or more than two of cholesteric gel agent, sugar gel agent, amide (urea) gel agent, amphiphilic gel agent, fatty acid gel agent, amino acid gel agent or metal organic compound gel agent.

[0011] Further, the sub-nanogel agent is selected from one or more than two of gadolinium hydroxide sub-nanowire, nickel molybdate sub-nanowire, hydroxyapatite sub-nanowire, tungsten oxide sub-nanowire, vanadium phosphate sub-nanowire, iron phosphomolybdate sub-nanowire, zirconium phosphomolybdate sub-nanowire, titanium phosphomolybdate sub-nanowire, nickel phosphomolybdate sub-nanowire, iron silicotungstate sub-nanowire, bismuth phosphomolybdate sub-nanowire, calcium phosphotungstate sub-nanowire or strontium phosphotungstate sub-nanowire.

[0012] Further, the polymer matrix is selected from any one or more than two of ethylene-vinyl acetate copolymer, ethylene-methyl methacrylate copolymer, ethylene-octene copolymer, ethylene-pentene, ethylene-butene copolymer.

[0013] Further, the initiator is selected from one or more than two of tert-butyl peroxide-2-ethylhexyl carbonate, tert-amyl peroxide 2-ethylhexyl carbonate, 2,5-dimethyl-2,5-bis(tert-butyl peroxide) hexane, tert-butyl peroxide maleate, tert-butyl peroxide acetate.

[0014] Further, the crosslinking agent is selected from one or more of triallyl isocyanurate, triallyl cyanurate, trimethyloallyl isocyanurate, tripropyleneglycol diacrylate, polyethyleneglycol diacrylate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, ethoxylated trimethylolpropane triacrylate, propoxylated glyceryl triacrylate, bis-trimethylolpropane tetraacrylate, pentaerythritol tetraacrylate, ethoxylated pentaerythritol tetraacrylate, pentaerythritol triacrylate, 1,6-hexanediol diacrylate, dipropylene glycol diacrylate, neopentyl glycol diacrylate, propoxylated neopentyl glycol diacrylate.

[0015] Further, the coupling agent is selected from one or more of silane coupling agent, trichloro vinyl silane, triethoxy vinyl silane, gamma-aminopropyl triethoxysilane, trichloro propenyl silane, gamma-methacryloxy propyl trimethoxysilane, gamma-mercaptopropyl trimethoxysilane, gamma-glycidoxy propyl trimethoxysilane.

[0016] Further, the antioxidant is selected from one or more of tetrakis[β-(3.5-di-tert-butyl, 4-hydroxyphenyl)propionic acid] pentaerythrityl ester, tris(2.4-di-tert-butylphenyl) phosphite, β-(3.5-di-tert-butyl, 4-hydroxyphenyl) propionic acid octadecyl ester.

[0017] Further, the ultraviolet light absorber is selected from one or more of 2-(2-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole, 2-hydroxy-4-n-octyloxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2,4,6-tris(2' n-butyloxyphenyl)-1,3,5-triazine.

[0018] Further, the light stabilizer is selected from one or more of bis(2,2,6,6-tetramethylpiperidyl) sebacate, poly(succinato-4-hydroxy-2,2,6,6-tetramethyl-1-piperidinoethanol), poly{[6-[(1,1,3,3-tetramethylbutyl)amino]-1,3,5-triazine-2,4-bis[(2,2,6,6,-tetramethyl-piperidyl)imino]-1,6-hexanediyl[(2,2,6,6-tetramethyl-4-piperidyl)imino]}, bis(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, 1-(methyl)-8-(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate.

[0019] The present application provides a method for preparing a photovoltaic encapsulant film, comprising the following steps:

[0020] Preparation of the auxiliary gel master batch: first, the initiator, crosslinking agent, coupling agent and gelling agent are mixed in proportion, then extruded, drawn, and granulated to obtain the auxiliary gel master batch;

[0021] Preparation of the anti-aging master batch: the antioxidant, ultraviolet absorber and light stabilizer are mixed, then extruded, drawn, and granulated to obtain the anti-aging master batch;

[0022] Film forming of the photovoltaic packaging adhesive film: the auxiliary gel master batch, the anti-aging master batch and the polymer matrix are mixed in proportion, then extruded and cast into a film, thereby obtaining the photovoltaic packaging adhesive film.

[0023] Further, in the preparation of the auxiliary gel master batch, the initiator, crosslinking agent, coupling agent and gelling agent are blended in proportion, then the mixture is put into a twin-screw extruder for extrusion, drawing and granulation to obtain the auxiliary gel master batch, or the initiator, crosslinking agent, coupling agent and gelling agent are respectively put into a twin-screw extruder through liquid metering pumps with a set feeding ratio, then extruded, drawn and granulated to obtain the auxiliary gel master batch.

[0024] Further, the length-diameter ratio of the twin-screw extruder is (32-56):1, the temperature of the main machine is set to 20-30℃, and the temperature of the die head is set to 30℃-50℃.

[0025] Further, in the film forming of the photovoltaic packaging adhesive film, the auxiliary gel master batch, the anti-aging master batch and the polymer matrix are blended at room temperature, the stirring time is less than or equal to 5min, and the stirring speed is 500-1000r / min.

[0026] Further, the prepared photovoltaic packaging adhesive film is the aforementioned photovoltaic packaging adhesive film.

[0027] The photovoltaic packaging adhesive film provided in the application adopts a gelling agent to form a three-dimensional network structure or a spatial structure such as micelles, vesicles and lamellar phase in an organic liquid (a mixed liquid of initiators, crosslinking agents and coupling agents), binds the organic liquid molecules in the spatial structure through the action of non-covalent bonds, limits the flow of the organic liquid, and can be gelled in a twin-screw extruder, then extruded and granulated to obtain a gel master batch (semi-solid or gel). The film product prepared by a conventional process can only absorb liquid additives by heating and stirring, especially POE, which needs heating and stirring for more than 2h, and at the same time brings problems such as more powder and precipitation of additives. BRIEF DESCRIPTION OF DRAWINGS

[0028] The accompanying drawings are used to better understand the application and do not constitute an improper limitation on the application. Among them:

[0029] Figure 1 The process flow chart of the photovoltaic packaging adhesive film provided in the application is shown in the accompanying drawings. Detailed Implementation

[0030] The following description provides exemplary embodiments of this application, including various details to aid understanding, and should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0031] This application proposes a photovoltaic encapsulating film. By employing a raw material formulation containing a gelling agent, the prepared photovoltaic encapsulating film solves the problem of liquid additive precipitation during use in existing photovoltaic encapsulating films. This not only improves the process stability and reliability of the photovoltaic encapsulating film but also extends its service life. Specifically, as follows:

[0032] This application provides a photovoltaic encapsulation film, which includes the following raw materials: a polymer matrix, an initiator, a crosslinking agent, a coupling agent, an antioxidant, an ultraviolet absorber, a light stabilizer, and a gelling agent.

[0033] In this application, the thickness of the photovoltaic encapsulation film is 0.2-0.8 mm, for example, it can be 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm or 0.8 mm.

[0034] In this application, the transparency of the photovoltaic encapsulating film is 85%-95%, for example, it can be 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94% or 95%.

[0035] In this application, the photovoltaic encapsulating film comprises the following raw materials in parts by weight: 100 parts polymer matrix, 0.2 to 1 part initiator, 0.3 to 1 part crosslinking agent, 0.15 to 1 part coupling agent, 0.05 to 1 part antioxidant, 0.05 to 1 part ultraviolet absorber, 0.05 to 1 part light stabilizer, and 0.1 to 1 part gelling agent.

[0036] In some embodiments, the photovoltaic encapsulating film comprises the following raw materials in parts by weight: 100 parts polymer matrix, 0.2-0.8 parts initiator, 0.3-0.8 parts crosslinking agent, 0.15-0.3 parts coupling agent, 0.05-0.5 parts antioxidant, 0.05-0.3 parts ultraviolet absorber, 0.05-0.3 parts light stabilizer, and 0.1-1 parts gelling agent.

[0037] In the present application, the photovoltaic encapsulant film is composed of the following raw materials by weight: 100 parts of the polymer matrix, 0.2-1 part of the initiator, 0.3-1 part of the crosslinking agent, 0.15-1 part of the coupling agent, 0.05-1 part of the antioxidant, 0.05-1 part of the ultraviolet absorber, 0.05-1 part of the light stabilizer, and 0.1-1 part of the gelling agent.

[0038] In some embodiments, the photovoltaic encapsulant film is composed of the following raw materials by weight: 100 parts of the polymer matrix, 0.2-0.8 part of the initiator, 0.3-0.8 part of the crosslinking agent, 0.15-0.3 part of the coupling agent, 0.05-0.5 part of the antioxidant, 0.05-0.3 part of the ultraviolet absorber, 0.05-0.3 part of the light stabilizer, and 0.1-1 part of the gelling agent.

[0039] Specifically, the content of the initiator in the raw materials of the photovoltaic encapsulant film can be 0.2 parts by weight, 0.25 parts by weight, 0.3 parts by weight, 0.35 parts by weight, 0.4 parts by weight, 0.45 parts by weight, 0.5 parts by weight, 0.55 parts by weight, 0.6 parts by weight, 0.65 parts by weight, 0.7 parts by weight, 0.75 parts by weight, 0.8 parts by weight, 0.9 parts by weight, or 1 part by weight.

[0040] Specifically, the content of the crosslinking agent in the raw materials of the photovoltaic encapsulant film can be 0.3 parts by weight, 0.35 parts by weight, 0.4 parts by weight, 0.45 parts by weight, 0.5 parts by weight, 0.55 parts by weight, 0.6 parts by weight, 0.65 parts by weight, 0.7 parts by weight, 0.75 parts by weight, 0.8 parts by weight, 0.9 parts by weight, or 1 part by weight.

[0041] Specifically, the content of the coupling agent in the raw materials of the photovoltaic encapsulant film can be 0.15 parts by weight, 0.16 parts by weight, 0.17 parts by weight, 0.18 parts by weight, 0.19 parts by weight, 0.2 parts by weight, 0.21 parts by weight, 0.22 parts by weight, 0.23 parts by weight, 0.24 parts by weight, 0.25 parts by weight, 0.26 parts by weight, 0.27 parts by weight, 0.28 parts by weight, 0.29 parts by weight, 0.3 parts by weight, 0.35 parts by weight, 0.4 parts by weight, 0.45 parts by weight, 0.5 parts by weight, 0.55 parts by weight, 0.6 parts by weight, 0.65 parts by weight, 0.7 parts by weight, 0.75 parts by weight, 0.8 parts by weight, 0.9 parts by weight, or 1 part by weight.

[0042] Specifically, the content of the antioxidant in the raw material of the photovoltaic packaging adhesive film can be 0.05 parts by weight, 0.06 parts by weight, 0.07 parts by weight, 0.08 parts by weight, 0.09 parts by weight, 0.10 parts by weight, 0.11 parts by weight, 0.12 parts by weight, 0.13 parts by weight, 0.14 parts by weight, 0.15 parts by weight, 0.16 parts by weight, 0.17 parts by weight, 0.18 parts by weight, 0.19 parts by weight, 0.2 parts by weight, 0.21 parts by weight, 0.22 parts by weight, 0.23 parts by weight, 0.24 parts by weight, 0.25 parts by weight, 0.26 parts by weight, 0.27 parts by weight, 0.28 parts by weight, 0.29 parts by weight, 0.3 parts by weight, 0.31 parts by weight, 0.32 parts by weight, 0.33 parts by weight, 0.34 parts by weight, 0.35 parts by weight, 0.36 parts by weight, 0.37 parts by weight, 0.38 parts by weight, 0.39 parts by weight, 0.4 parts by weight, 0.41 parts by weight, 0.42 parts by weight, 0.43 parts by weight, 0.44 parts by weight, 0.45 parts by weight, 0.46 parts by weight, 0.47 parts by weight, 0.48 parts by weight, 0.49 parts by weight, 0.5 parts by weight, 0.55 parts by weight, 0.6 parts by weight, 0.65 parts by weight, 0.7 parts by weight, 0.75 parts by weight, 0.8 parts by weight, 0.9 parts by weight, or 1 parts by weight.

[0043] Specifically, the content of the ultraviolet absorber in the raw material of the photovoltaic packaging adhesive film is 0.05 parts by weight, 0.06 parts by weight, 0.07 parts by weight, 0.08 parts by weight, 0.09 parts by weight, 0.10 parts by weight, 0.11 parts by weight, 0.12 parts by weight, 0.13 parts by weight, 0.14 parts by weight, 0.15 parts by weight, 0.16 parts by weight, 0.17 parts by weight, 0.18 parts by weight, 0.19 parts by weight, 0.2 parts by weight, 0.21 parts by weight, 0.22 parts by weight, 0.23 parts by weight, 0.24 parts by weight, 0.25 parts by weight, 0.26 parts by weight, 0.27 parts by weight, 0.28 parts by weight, 0.29 parts by weight, 0.3 parts by weight, 0.35 parts by weight, 0.4 parts by weight, 0.45 parts by weight, 0.5 parts by weight, 0.55 parts by weight, 0.6 parts by weight, 0.65 parts by weight, 0.7 parts by weight, 0.75 parts by weight, 0.8 parts by weight, 0.9 parts by weight, or 1 parts by weight.

[0044] Specifically, the content of the light stabilizer in the raw material of the photovoltaic encapsulation adhesive film is 0.05 parts by weight, 0.06 parts by weight, 0.07 parts by weight, 0.08 parts by weight, 0.09 parts by weight, 0.10 parts by weight, 0.11 parts by weight, 0.12 parts by weight, 0.13 parts by weight, 0.14 parts by weight, 0.15 parts by weight, 0.16 parts by weight, 0.17 parts by weight, 0.18 parts by weight, 0.19 parts by weight, 0.2 parts by weight, 0.21 parts by weight, 0.22 parts by weight, 0.23 parts by weight, 0.24 parts by weight, 0.25 parts by weight, 0.26 parts by weight, 0.27 parts by weight, 0.28 parts by weight, 0.29 parts by weight, 0.3 parts by weight, 0.35 parts by weight, 0.4 parts by weight, 0.45 parts by weight, 0.5 parts by weight, 0.55 parts by weight, 0.6 parts by weight, 0.65 parts by weight, 0.7 parts by weight, 0.75 parts by weight, 0.8 parts by weight, 0.9 parts by weight, or 1 part by weight.

[0045] Specifically, the content of the gelling agent in the raw material of the photovoltaic encapsulation adhesive film is 0.1 parts by weight, 0.15 parts by weight, 0.16 parts by weight, 0.17 parts by weight, 0.18 parts by weight, 0.19 parts by weight, 0.2 parts by weight, 0.21 parts by weight, 0.22 parts by weight, 0.23 parts by weight, 0.24 parts by weight, 0.25 parts by weight, 0.26 parts by weight, 0.27 parts by weight, 0.28 parts by weight, 0.29 parts by weight, 0.3 parts by weight, 0.35 parts by weight, 0.4 parts by weight, 0.45 parts by weight, 0.5 parts by weight, 0.55 parts by weight, 0.6 parts by weight, 0.65 parts by weight, 0.7 parts by weight, 0.75 parts by weight, 0.8 parts by weight, 0.9 parts by weight, or 1 part by weight.

[0046] In the present application, the polymer matrix is selected from any one or two or more of ethylene-vinyl acetate copolymer, ethylene-methyl methacrylate copolymer, ethylene-octene copolymer, ethylene-pentene, ethylene-butene copolymer, preferably any one or two or more of ethylene-vinyl acetate copolymer, ethylene-octene copolymer, ethylene-butene copolymer.

[0047] In the present application, the initiator is selected from one or two or more of tert-butyl peroxy-2-ethylhexyl carbonate, tert-amyl peroxy-2-ethylhexyl carbonate, 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, tert-butyl peroxy maleate, tert-butyl peroxy acetate, preferably any one or two or more of tert-butyl peroxy-2-ethylhexyl carbonate, tert-amyl peroxy-2-ethylhexyl carbonate.

[0048] In the present application, the crosslinking agent is selected from one or more of triallyl isocyanurate, triallyl cyanurate, trimethylolethane triacrylate, tripropyleneglycol diacrylate, polyethylene glycol diacrylate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, ethoxylated trimethylolpropane triacrylate, propoxylated glyceryl triacrylate, bis-trimethylolpropane tetraacrylate, pentaerythritol tetraacrylate, ethoxylated pentaerythritol tetraacrylate, pentaerythritol triacrylate, 1,6-hexanediol diacrylate, dipropylene glycol diacrylate, neopentyl glycol diacrylate, propoxylated neopentyl glycol diacrylate, and preferably one or more of triallyl isocyanurate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, ethoxylated trimethylolpropane triacrylate.

[0049] In the present application, the coupling agent is selected from one or more of silane coupling agents, trichloro vinyl silane, triethoxy vinyl silane, gamma-aminopropyl triethoxysilane, trichloro propenyl silane, gamma-methacryloyloxy propyl trimethoxysilane, gamma-mercaptopropyl trimethoxysilane, gamma-glycidoxy propyl trimethoxysilane, and preferably gamma-methacryloyloxy propyl trimethoxysilane.

[0050] In the present application, the antioxidant is selected from one or more of tetrakis [beta-(3,5-di-tert-butyl, 4-hydroxyphenyl) propionate] pentaerythritol, tris(2,4-di-tert-butylphenyl) phosphite, beta-(3,5-di-tert-butyl, 4-hydroxyphenyl) propionic acid octadecyl ester, and preferably tris(2,4-di-tert-butylphenyl) phosphite.

[0051] In the present application, the ultraviolet absorber is selected from one or more of 2-(2-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole, 2-hydroxy-4-n-octyloxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2,4,6-tris(2'-n-butyloxyphenyl)-1,3,5-triazine, and preferably one or more of 2-hydroxy-4-n-octyloxybenzophenone, 2-hydroxy-4-methoxybenzophenone.

[0052] In the present application, the light stabilizer is selected from any one or more of bis(2,2,6,6-tetramethylpiperidyl) sebacate, poly(butylene succinate-4-hydroxy-2,2,6,6-tetramethyl-1-piperidinylethanol), poly{[6-[(1,1,3,3-tetramethylbutyl)amino]-1,3,5-triazine-2,4-bis[(2,2,6,6,-tetramethyl-piperidyl)imino]-1,6-hexanediyl[(2,2,6,6-tetramethyl-4-piperidyl)imino]}, bis(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, 1-(methyl)-8-(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, preferably any one or more of bis(2,2,6,6-tetramethylpiperidyl) sebacate, poly(butylene succinate-4-hydroxy-2,2,6,6-tetramethyl-1-piperidinylethanol), bis(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate.

[0053] In some embodiments, the polymer matrix is selected from any one or more of ethylene-vinyl acetate copolymer, ethylene-octene copolymer, ethylene-butene copolymer; the initiator is selected from any one or more of tert-butyl peroxy-2-ethylhexyl carbonate, tert-amyl peroxy-2-ethylhexyl carbonate; the crosslinking agent is selected from any one or more of triallyl isocyanurate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, ethoxylated trimethylolpropane triacrylate; the coupling agent is γ-methacryloxypropyltrimethoxysilane; the antioxidant is tris(2.4-di-tert-butylphenyl) phosphite; the ultraviolet absorber is any one or more of 2-hydroxy-4-n-octyloxybenzophenone, 2-hydroxy-4-methoxybenzophenone; the light stabilizer is any one or more of bis(2,2,6,6-tetramethylpiperidyl) sebacate, poly(butylene succinate-4-hydroxy-2,2,6,6-tetramethyl-1-piperidinylethanol), bis(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate.

[0054] In the present application, the gelation transition temperature of the gelling agent is 50-120°C.

[0055] In some embodiments, the gelation transition temperature of the gelling agent can be 50-60°C.

[0056] In some embodiments, the gelation transition temperature of the gelling agent can be 50-70°C.

[0057] In some embodiments, the gelation transition temperature of the gelling agent can be 50-80°C.

[0058] In some embodiments, the gelling agent has a gelation transition temperature of 50-90°C.

[0059] In some embodiments, the gelling agent has a gelation transition temperature of 50-100°C.

[0060] In particular, the gelling agent has a gelation transition temperature of 50°C, 55°C, 60°C, 65°C, 70°C, 75°C, 80°C, 85°C, 90°C, 95°C, 100°C, 105°C, 110°C, 115°C or 120°C.

[0061] In some embodiments, the gelling agent is a reversible gelling agent.

[0062] In some embodiments, the gelling agent is a reversible gelling agent, and the gelling agent has a gelation transition temperature of 50-120°C.

[0063] The maximum temperature that the adhesive film can be stored at is 50°C, and the temperature of one cavity of the laminator is 120°C.

[0064] In the present application, the reversible gelling agent does not chemically react with the polymer matrix, the initiator, the crosslinking agent, the coupling agent, the antioxidant, the ultraviolet absorber and the light stabilizer. The reversible gelling agent functions to form a three-dimensional network structure, to confine the reaction products of the polymer matrix, the initiator, the crosslinking agent, the coupling agent, the antioxidant, the ultraviolet absorber and the light stabilizer within the three-dimensional network structure, and to thereby make the adhesive film less likely to release the liquid adjuvant during use.

[0065] Reversible gelling agent: The state of the gelling agent can change with temperature, for example, the state thereof changes between solid, semi-solid and liquid at different temperatures.

[0066] The organic liquid is effectively bound by the three-dimensional network structure formed by the reversible gelling agent, thereby semi-solidifying the organic liquid; and the semi-solid state can be changed back to liquid state under conditions exceeding the gelation transition temperature.

[0067] In the present application, the gelling agent is selected from a small-molecule organic gelling agent or a sub-nanowire gelling agent, and is preferably a sub-nanowire gelling agent.

[0068] Further, the small-molecule gelling agent is a cholesteric gelling agent, a saccharide gelling agent, an amide (urea) gelling agent, an amphiphilic gelling agent, a fatty acid gelling agent, an amino acid gelling agent, a metal-organic compound gelling agent, and is preferably a cholesteric gelling agent, a saccharide gelling agent, an amide (urea) gelling agent, an amphiphilic gelling agent.

[0069] The sub-nanogel agent is selected from the group consisting of gadolinium hydroxide sub-nanowires, nickel molybdate sub-nanowires, hydroxyapatite sub-nanowires, tungsten oxide sub-nanowires, vanadium phosphate sub-nanowires, iron phosphomolybdate sub-nanowires, zirconium phosphomolybdate sub-nanowires, titanium phosphomolybdate sub-nanowires, nickel phosphomolybdate sub-nanowires, iron silicotungstate sub-nanowires, bismuth phosphomolybdate sub-nanowires, calcium phosphotungstate sub-nanowires, and strontium phosphotungstate sub-nanowires, and preferably one or more of iron phosphomolybdate sub-nanowires, gadolinium hydroxide sub-nanowires, and calcium tungstate sub-nanowires.

[0070] The application also provides a preparation method of a photovoltaic encapsulating adhesive film (as shown in the process flow thereof) Figure 1 The preparation method comprises the following steps:

[0071] Step one: preparation of an auxiliary gel masterbatch: first, the initiator, crosslinking agent, coupling agent, and gelling agent are mixed in a certain proportion, and then extruded, drawn, and cut into auxiliary gel masterbatch;

[0072] Step two: preparation of an anti-aging masterbatch: the antioxidant, ultraviolet absorber, and light stabilizer are mixed, and then extruded, drawn, and cut into an anti-aging masterbatch;

[0073] Step three: film formation of the photovoltaic encapsulating adhesive film: the auxiliary gel masterbatch, anti-aging masterbatch, and polymer matrix are mixed in a certain proportion, and then extruded and cast into a film, thereby obtaining the photovoltaic encapsulating adhesive film.

[0074] In step one, the application provides two methods to obtain the auxiliary gel masterbatch.

[0075] The first method is: in the preparation process of the auxiliary gel masterbatch, the initiator, crosslinking agent, coupling agent, and gelling agent are blended in a certain proportion, and then the mixture is put into a twin-screw extruder for extrusion, drawing, and cutting into auxiliary gel masterbatch.

[0076] The second method is: the initiator, crosslinking agent, coupling agent, and gelling agent are respectively put into a twin-screw extruder through liquid metering pumps with a set feeding ratio, and then extruded, drawn, and cut into the auxiliary gel masterbatch.

[0077] The length-diameter ratio of the twin-screw extruder is (32-56):1, for example, it can be 32:1, 32:1, 36:1, 40:1, 44:1, 48:1, 52:1.

[0078] The main machine temperature of the twin-screw extruder is set to 20-30°C, for example, it can be 20°C, 21°C, 22°C, 23°C, 24°C, 25°C, 26°C, 27°C, 28°C, 29°C, or 30°C.

[0079] The die temperature of the twin-screw extruder is set to 30-50℃, for example, it can be 30℃, 31℃, 32℃, 33℃, 34℃, 35℃, 36℃, 37℃, 38℃, 39℃, 40℃, 41℃, 42℃, 43℃, 44℃, 45℃, 46℃, 47℃, 48℃, 49℃ or 50℃.

[0080] In step two, the antioxidant, ultraviolet absorber, and light stabilizer are simultaneously or separately fed into the twin-screw extruder, and then extruded, drawn, and granulated to obtain the anti-aging master batch.

[0081] In step three, during the film forming process of the photovoltaic packaging adhesive film, the auxiliary gel master batch and the anti-aging master batch are blended with the polymer matrix in a proportion at room temperature, and then fed into a single-screw extruder for extrusion and casting film forming, and the shaped product is the photovoltaic packaging adhesive film.

[0082] Specifically, the auxiliary gel master batch and the anti-aging master batch are blended with the polymer matrix at room temperature, the stirring time is less than or equal to 5 min, for example, it can be 5 min, 4 min, etc., and the stirring speed is 500-1000 r / min, for example, it can be 500 r / min, 550 r / min, 600 r / min, 650 r / min, 700 r / min, 750 r / min, 800 r / min, 850 r / min, 900 r / min, 950 r / min or 1000 r / min.

[0083] The application also provides a preparation method of a photovoltaic packaging adhesive film, comprising the following steps:

[0084] Step one: preparation of auxiliary gel master batch: first, the initiator, crosslinking agent, coupling agent and gelling agent are mixed in a proportion, and then extruded, drawn and granulated to obtain the auxiliary gel master batch.

[0085] Specifically, the application provides two methods to obtain the auxiliary gel master batch.

[0086] The first method is: in the preparation process of the auxiliary gel master batch, the initiator, crosslinking agent, coupling agent and gelling agent are blended in a proportion, and then the mixture is fed into a twin-screw extruder for extrusion, drawing and granulation to obtain the auxiliary gel master batch.

[0087] The second method is: the initiator, crosslinking agent, coupling agent and gelling agent are respectively fed into a twin-screw extruder through a liquid metering pump, and then extruded, drawn and granulated to obtain the auxiliary gel master batch.

[0088] The length-diameter ratio of the twin-screw extruder is (32-56):1, for example, it can be 32:1, 32:1, 36:1, 40:1, 44:1, 48:1, 52:1.

[0089] The main machine temperature of the twin-screw extruder is set to 20-30℃, for example, it can be 20℃, 21℃, 22℃, 23℃, 24℃, 25℃, 26℃, 27℃, 28℃, 29℃ or 30℃.

[0090] The die temperature of the twin-screw extruder is set to 30-50℃, for example, it can be 30℃, 31℃, 32℃, 33℃, 34℃, 35℃, 36℃, 37℃, 38℃, 39℃, 40℃, 41℃, 42℃, 43℃, 44℃, 45℃, 46℃, 47℃, 48℃, 49℃ or 50℃.

[0091] Step two: preparation of anti-aging masterbatch: antioxidant, ultraviolet absorber, light stabilizer are mixed, then extruded, drawn, and granulated to obtain anti-aging masterbatch;

[0092] Specifically, the antioxidant, ultraviolet absorber and light stabilizer are simultaneously or separately fed into the twin-screw extruder, then extruded, drawn and granulated to obtain the anti-aging masterbatch.

[0093] Step three: photovoltaic packaging adhesive film forming: the auxiliary gel masterbatch, anti-aging masterbatch and polymer matrix are mixed in proportion, then extruded and cast into a film to obtain the photovoltaic packaging adhesive film.

[0094] Specifically, during the film forming of the photovoltaic packaging adhesive film, the auxiliary gel masterbatch, anti-aging masterbatch and polymer matrix are fed into the mixer in proportion at room temperature, then extruded and cast into a film after mixing, and the film is obtained after setting.

[0095] Specifically, the auxiliary gel masterbatch, anti-aging masterbatch and polymer matrix are blended at room temperature, the stirring time is less than or equal to 5min, for example, it can be 5min, 4min, etc., and the stirring speed is 500-1000r / min, for example, it can be 500r / min, 550r / min, 600r / min, 650r / min, 700r / min, 750r / min, 800r / min, 850r / min, 900r / min, 950r / min or 1000r / min.

[0096] The preparation method described in the present application first mixes the liquid initiator, crosslinking agent, coupling agent and gelling agent according to the formula proportion, or adjusts the feeding proportion of the liquid metering pump; the liquid additive is fed into the twin-screw extruder, and the temperature of the main machine of the extruder is lower than the gelation transition temperature of the gelling agent; the thread combination of the twin screw in the extruder can make all the liquids uniformly mixed and form a gel or a semi-solid substance, and finally the strand is cut into granules. The gelling agent forms a three-dimensional network structure or a spatial structure such as micelles, vesicles, lamellar phase in the organic liquid, and binds the organic liquid molecules in the spatial structure through the action of non-covalent bonds, limiting the flow of organic liquid. The final liquid additive becomes semi-solid or gel. This form of additive is convenient for forming through a twin-screw extruder, and finally the liquid additive can be processed into an additive gel master batch.

[0097] Secondly, the powder-like antioxidant, ultraviolet absorber, light stabilizer, and polymer matrix are simultaneously or separately fed into the twin-screw extruder according to the formula composition to form an anti-aging master batch.

[0098] Finally, the additive gel master batch, anti-aging master batch and polymer matrix are fed into a mixer according to the proportion for blending, and then fed into a single-screw extruder for extrusion and film casting. After shaping, the novel photovoltaic packaging adhesive film is obtained. In the field of conventional photovoltaic packaging adhesive films, the polymer matrix, liquid additive and anti-aging master batch are directly added to a horizontal mixer or a conical mixer, and the organic liquid is coated on the rough surface of the polymer adhesive particles by temperature. This method can cause the following problems: uneven mixing caused by the phase separation of solid and liquid; uneven temperature leading to the volatilization and reaction of liquid additives; powder caused by long-time (usually more than two hours) stirring of polymer adhesive particles, resulting in formula loss; too much liquid additive causing single-screw extruder to slip, reducing production efficiency.

[0099] The present application directly makes the liquid additive into an additive gel master batch through a gelling agent, which can completely avoid the above production problems. Secondly, when the gelling agent is added to the adhesive film, the gelling additive binds the additive firmly inside the adhesive film through the action of non-covalent bond force, thereby avoiding the slipping problem caused by the precipitation of liquid additives. Therefore, the selection of adhesive film formula can be more bold and open; secondly, the shelf life of the adhesive film can be extended; finally, the phenomenon of battery piece deviation does not occur in the component production process.

[0100] The photovoltaic packaging adhesive film prepared by the preparation method described in the present application is the aforementioned photovoltaic packaging adhesive film.

[0101] Examples

[0102] The experimental methods used in the following examples are conventional methods unless otherwise specified.

[0103] The materials, reagents, etc. used in the following examples, unless otherwise specified, can be obtained commercially.

[0104] Example 1

[0105] The present embodiment is a preparation method of a photovoltaic packaging adhesive film, comprising the following steps:

[0106] Step one: preparation of auxiliary gel masterbatch: first blend 0.4 parts by weight of initiator (tert-butyl peroxy-2-ethylhexyl carbonate), 0.4 parts by weight of crosslinking agent (triallyl isocyanurate), 0.6 parts by weight of coupling agent (triethoxysilane vinyl silane) and 0.2 parts by weight of gelling agent (iron molybdophosphate sub-nanometer wire) in proportion, then put the mixture into a twin-screw extruder for extrusion, drawing and granulation to obtain the auxiliary gel masterbatch; the main machine temperature of the twin-screw extruder is set to 25°C, and the die temperature is set to 40°C.

[0107] Step two: preparation of anti-aging masterbatch: put 0.3 parts by weight of antioxidant (β-(3.5-di-tert-butyl, 4-hydroxyphenyl) octadecyl propionate), 0.1 parts by weight of ultraviolet absorber (2-hydroxy-4-n-octyloxybenzophenone) and 0.2 parts by weight of light stabilizer (bis(2,2,6,6-tetramethylpiperidyl) sebacate) into a twin-screw extruder at the same time, then extrude, draw and granulate to obtain the anti-aging masterbatch.

[0108] Step three: film forming of photovoltaic packaging adhesive film: under normal temperature conditions, put the auxiliary gel masterbatch, anti-aging masterbatch and 100 parts by weight of polymer matrix (ethylene-octene copolymer) into a mixer in proportion, stir for 2 min at a stirring speed of 500 r / min, then put into a single-screw extruder for extrusion and casting film forming, thereby obtaining the photovoltaic packaging adhesive film, and the various parameters are shown in Table 1.

[0109] 1. Measurement of static friction coefficient:

[0110] Lay the test sample flat on the test machine test bed, use the test machine's own clamping tool to fix the sample directly below the sliding block (205g), which is connected to the transmission mechanism of the test machine;

[0111] Place the sliding block on the glass surface and stand for 15s;

[0112] After standing, pull the sliding block at a constant speed of 100 mm / min. Through the force value sensor located on the transmission mechanism and the displacement sensor built-in the machine, the force value change and displacement change during the test are collected, thereby calculating the various friction mechanical performance indexes of the test sample, and the results are shown in Table 2.

[0113] The static friction coefficient is dimensionless and has no unit.

[0114] 2. Additive migration test:

[0115] The sample to be tested was directly attached to the blank EVA; then the treated sample was placed in a normal temperature environment for 60 days, 180 days for additive adsorption; the blank EVA was peeled off and soaked in acetone solution for sufficient dissolution; after dissolution, quantitative analysis was carried out by chromatograph, and the results are shown in Table 3.

[0116] Examples 2-5 differ from Example 1 in that the types of gelling agents are different, and the parameters of the photovoltaic packaging adhesive film prepared are shown in Tables 1-3.

[0117] Examples 6-10 differ from Example 1 in that the contents of the gelling agents are different, and the parameters of the photovoltaic packaging adhesive film prepared are shown in Tables 1-3.

[0118] Examples 11-12 differ from Example 1 in that the types of polymer matrices are different, and the parameters of the photovoltaic packaging adhesive film prepared are shown in Tables 1-3.

[0119] Examples 13-16 differ from Example 1 in that the gelation transition temperatures of the gelling agents are different, and the parameters of the photovoltaic packaging adhesive film prepared are shown in Tables 1-3.

[0120] Example 17 differs from Example 1 in that the preparation method is different, and the preparation method in the embodiment is: the initiator, crosslinking agent, coupling agent, gelling agent, antioxidant, ultraviolet absorber, light stabilizer and polymer matrix are uniformly mixed to obtain a mixture, and then the mixture is put into a single screw extruder to flow and form a film, thereby obtaining the photovoltaic packaging adhesive film. The parameters of the photovoltaic packaging adhesive film prepared are shown in Tables 1-3.

[0121] Comparative Example 1 differs from Example 1 in that no gelling agent is added, and the parameters of the photovoltaic packaging adhesive film prepared are shown in Tables 1-3.

[0122] Table 1 in the embodiment is the parameters of each example and comparative example

[0123]

[0124] Table 2 is the static friction coefficient of each example and comparative example at different storage times

[0125] Item 0 days 30 days 60 days 90 days 120 days 150 days 180 days Example 1 0.610 0.599 0.580 0.567 0,569 0.561 0.553 Example 2 0.607 0.591 0.583 0.571 0.563 0.552 0.557 Example 3 0.593 0.573 0.560 0.539 0.510 0.509 0.503 Example 4 0.616 0.600 0.576 0.561 0.549 0.537 0.532 Example 5 0.631 0.607 0.567 0.520 0.499 0.460 0.455 Example 6 0.623 0.621 0.610 0.603 0.592 0.588 0.570 Example 7 0.617 0.598 0.584 0.573 0.569 0.560 0.562 Example 8 0.598 0.580 0.563 0.550 0.530 0.517 0.507 Example 9 0.613 0.599 0.581 0.563 0.541 0.513 0.508 Example 10 0.610 0.569 0.544 0.512 0.500 0.488 0.479 Example 11 0.609 0.597 0.583 0.569 0.570 0.563 0.560 Example 12 0.615 0.615 0.613 0.607 0.601 0.595 0.594 Example 13 0.599 0.589 0.580 0.567 0.561 0.555 0.551 Example 14 0.630 0.621 0.617 0.610 0.602 0.596 0.586 Example 15 0.620 0.591 0.559 0.521 0.503 0.486 0.477 Example 16 0.611 0.567 0.513 0.477 0.439 0.375 0.312 Example 17 0.615 0.592 0.572 0.559 0.541 0.523 0.487 Comparative Example 1 0.598 0.541 0.475 0.407 0.337 0.266 0.219

[0126] Summary: From the above table, it can be seen that the photovoltaic encapsulation adhesive film described in the present application has a large static friction coefficient, even after 180 days of storage, the change in the friction coefficient is small, and it still has a large friction coefficient. Therefore, it can be seen that the additives in the photovoltaic encapsulation adhesive film of the present application do not precipitate, and the service life is long.

[0127] Table 3 is the migration of the liquid additive of each example and the comparative example

[0128]

[0129] Component A is a peroxide initiator component, B is an acrylic crosslinking agent, and component C is a silane coupling agent

[0130] Summary: From the above table, it can be seen that the photovoltaic encapsulation adhesive film described in the present application has a large static friction coefficient, even after 180 days of storage, the change in the friction coefficient is small, and it still has a large friction coefficient. Therefore, it can be seen that the additives in the photovoltaic encapsulation adhesive film of the present application do not precipitate, and the service life is long.

[0131] Although the above describes the embodiments of the present application, the present application is not limited to the above specific embodiments and application fields, and the above specific embodiments are only illustrative and guiding, but not limiting. Those skilled in the art can make many forms under the guidance of the present specification and without departing from the scope protected by the claims of the present application, which all belong to the protection of the present application.

Claims

1. A photovoltaic encapsulant film, wherein, The photovoltaic encapsulating adhesive film comprises the following raw materials: a polymer matrix, an initiator, a crosslinking agent, a coupling agent, an antioxidant, an ultraviolet absorber, a light stabilizer, and a gelling agent; The polymer matrix is 100 parts, the initiator is 0.2-1 part, the crosslinking agent is 0.3-1 part, the coupling agent is 0.15-1 part, the antioxidant is 0.05-1 part, the ultraviolet absorber is 0.05-1 part, the light stabilizer is 0.05-1 part, and the gelling agent is 0.1-1 part; The gelling agent is selected from a small molecule gelling agent or a sub-nanowire gelling agent; The gelling agent is a reversible gelling agent, The gelling agent has a gelation transition temperature of 50-120℃.

2. The photovoltaic encapsulant film of claim 1, wherein, The small molecule gelling agent is selected from one or more than two of a cholesteric gelling agent, a saccharide gelling agent, an amide gelling agent, an acylurea gelling agent, an amphiphilic gelling agent, a fatty acid gelling agent, an amino acid gelling agent, or a metal organic compound gelling agent.

3. The photovoltaic encapsulant film of claim 1, wherein, The sub-nanowire gelling agent is selected from one or more than two of gadolinium hydroxide sub-nanowires, nickel molybdate sub-nanowires, hydroxyapatite sub-nanowires, tungsten oxide sub-nanowires, vanadium phosphate sub-nanowires, iron phosphomolybdate sub-nanowires, zirconium phosphomolybdate sub-nanowires, titanium phosphomolybdate sub-nanowires, nickel phosphomolybdate sub-nanowires, iron silicotungstate sub-nanowires, bismuth phosphomolybdate sub-nanowires, calcium phosphotungstate sub-nanowires, or strontium phosphotungstate sub-nanowires.

4. The photovoltaic encapsulant film of claim 1, wherein, The polymer matrix is selected from any one or more than two of ethylene-vinyl acetate copolymer, ethylene-methyl methacrylate copolymer, ethylene-octene copolymer, ethylene-pentene copolymer, and ethylene-butene copolymer.

5. The photovoltaic encapsulant film of claim 1, wherein, The initiator is selected from one or more than two of tert-butyl peroxy-2-ethylhexyl carbonate, tert-amyl peroxy-2-ethylhexyl carbonate, 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, tert-butyl peroxy maleate, and tert-butyl peroxy acetate.

6. The photovoltaic encapsulant film of claim 1, wherein, The crosslinking agent is selected from one or more than two of triallyl isocyanurate, triallyl cyanurate, trimethallyl isocyanurate, tripropylene glycol diacrylate, polyethylene glycol diacrylate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, ethoxylated trimethylolpropane triacrylate, propoxylated glyceryl triacrylate, bis-trimethylolpropane tetraacrylate, pentaerythritol tetraacrylate, ethoxylated pentaerythritol tetraacrylate, pentaerythritol triacrylate, 1,6-hexanediol diacrylate, dipropylene glycol diacrylate, neopentyl glycol diacrylate, and propoxylated neopentyl glycol diacrylate.

7. The photovoltaic encapsulant film of claim 1, wherein, The coupling agent is selected from any one or more than two of trichlorovinylsilane, triethoxysilane, γ-aminopropyltriethoxysilane, trichloropropenylsilane, γ-methacryloyloxypropyltrimethoxysilane, γ-mercaptopropyltrimethoxysilane, and γ-glycidoxypropyltrimethoxysilane.

8. The photovoltaic encapsulant film of claim 1, wherein, The antioxidant is selected from any one or more than two of pentaerythrityl tetrakis[β-(3,5-di-tert-butyl, 4-hydroxyphenyl)propionate] antioxidant, tris(2,4-di-tert-butylphenyl) phosphite, and β-(3,5-di-tert-butyl, 4-hydroxyphenyl) propionic acid octadecyl ester.

9. The photovoltaic encapsulant film of claim 1, wherein, The ultraviolet absorber is selected from any one or more of 2-(2-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole, 2-hydroxy-4-n-octyloxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2,4,6-tris(2'-n-butyloxyphenyl)-1,3,5-triazine.

10. The photovoltaic encapsulant film of claim 1, wherein, The light stabilizer is selected from any one or more of bis(2,2,6,6-tetramethylpiperidyl) sebacate, poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidinoethanol) succinate, poly{[6-[(1,1,3,3-tetramethylbutyl)amino]-1,3,5-triazine-2,4-bis[(2,2,6,6,-tetramethyl-piperidyl)imino]-1,6-hexanediyl[(2,2,6,6-tetramethyl-4-piperidyl)imino]}, bis(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, 1-(methyl)-8-(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate.

11. A method of preparing a photovoltaic encapsulant film, wherein, The method comprises the following steps: Preparation of the auxiliary gel master batch: the initiator, the crosslinking agent, the coupling agent, and the gelling agent are mixed in a certain proportion, and then extruded, drawn, and granulated to obtain the auxiliary gel master batch; Preparation of the anti-aging master batch: the antioxidant, the ultraviolet absorber, and the light stabilizer are mixed, and then extruded, drawn, and granulated to obtain the anti-aging master batch; Film formation of the photovoltaic packaging adhesive film: the auxiliary gel master batch, the anti-aging master batch, and the polymer matrix are mixed in a certain proportion, and then extruded and cast into a film to obtain the photovoltaic packaging adhesive film; The polymer matrix is 100 parts, the initiator is 0.2-1 part, the crosslinking agent is 0.3-1 part, the coupling agent is 0.15-1 part, the antioxidant is 0.05-1 part, the ultraviolet absorber is 0.05-1 part, the light stabilizer is 0.05-1 part, and the gelling agent is 0.1-1 part; The gelling agent is selected from a small-molecule gelling agent or a sub-nanowire gelling agent; The gelling agent is a reversible gelling agent, The gelling temperature of the gelling agent is 50-120℃.

12. The method of making according to claim 11, wherein, In the preparation of the auxiliary gel master batch, the initiator, the crosslinking agent, the coupling agent, and the gelling agent are blended in a certain proportion, and then the mixture is fed into a double-screw extruder to be extruded, drawn, and granulated to obtain the auxiliary gel master batch, or the initiator, the crosslinking agent, the coupling agent, and the gelling agent are respectively fed into a double-screw extruder through liquid metering pumps in a certain proportion, and then the mixture is extruded, drawn, and granulated to obtain the auxiliary gel master batch.

13. The production method according to claim 12, wherein The length-diameter ratio of the double-screw extruder is (32-56):1, the temperature of the main machine is set to 20-30℃, and the temperature of the die head is set to 30℃-50℃.

14. The method of making according to claim 11, wherein, In the film formation of the photovoltaic packaging adhesive film, the auxiliary gel master batch, the anti-aging master batch, and the polymer matrix are blended at room temperature, the stirring time is less than or equal to 5 min, and the stirring speed is 500-1000 r / min.

15. The method of making according to any one of claims 11-14, wherein, The prepared photovoltaic packaging adhesive film is the photovoltaic packaging adhesive film according to any one of claims 1-10.

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