High-strength hydrophobic high-reliability packaging adhesive film and preparation method thereof

Abstract

The application relates to the technical field of encapsulating materials for photovoltaic modules, and provides a high-strength hydrophobic high-reliability encapsulating adhesive film which comprises, from top to bottom, an EVA adhesive film layer, a high-strength hydrophobic layer, a water-absorbing adhesive layer and a polyolefin adhesive film layer; the upper surface of the EVA adhesive film layer and the lower surface of the polyolefin adhesive film layer are provided with transverse and longitudinal grooves in the form of a checkered pattern; the lower surface of the high-strength hydrophobic layer is provided with a plurality of regular first circular-arc structures; and the upper surface of the water-absorbing adhesive layer is provided with second circular-arc structures matched with the first circular-arc structures. The application further provides a preparation method of the high-strength hydrophobic high-reliability encapsulating adhesive film; the composite high-strength hydrophobic layer and the water-absorbing adhesive layer are matched with the front surface and the transparent EVA adhesive film, and the back surface and the transparent polyolefin film, then the upper and lower surfaces are subjected to checkered embossing, and are wound. The encapsulating adhesive film has good water-blocking effect and high tensile strength, can effectively increase the mechanical properties of the encapsulating module, and promotes the lightweight design of the encapsulating module.

Description

Technical Field

[0001] This invention relates to the field of encapsulation materials for photovoltaic modules, and more specifically, to a high-strength, hydrophobic, and highly reliable encapsulating film and its preparation method. Background Technology

[0002] In recent years, with the rapid development of battery technology, bifacial battery technology has seen an increasing variety of developments. Furthermore, the efficiency of the front-side cells in bifacial batteries is higher than that of ordinary single-sided cells. Therefore, modules encapsulated with bifacial batteries have largely replaced traditional single-sided battery modules. However, due to the unique structure of bifacial batteries, their back-side alumina passivation technology makes them more sensitive to moisture, resulting in more power degradation mechanisms. Therefore, improving the moisture barrier performance of the encapsulation film for bifacial batteries and reducing the impact of moisture on the passivation layer of the cells has become increasingly important.

[0003] Furthermore, with the formulation of the new IEC standard in 2021, the PID test conditions for bifacial cell encapsulated modules have added requirements for light recovery. Current research has found that with the addition of light conditions, using EVA film encapsulation can also meet the anti-PID requirements of the new IEC standard for bifacial modules. However, compared with POE materials, EVA materials have poor moisture barrier properties and are prone to corrosion of the cells and formation of metal ions under high temperature and high humidity conditions, which can damage the PN junction of the cells and lead to a significant decrease in module power.

[0004] Meanwhile, as the application of building-integrated photovoltaic (BIPV) modules becomes more widespread, the requirements for lightweight modules are becoming increasingly stringent. In the process of lightweight module design, the mechanical load performance of the modules is prone to decline. However, by reasonably reinforcing the encapsulant film, the mechanical load performance of the modules can be effectively increased.

[0005] Therefore, those skilled in the art urgently need to provide a high-strength, low-moisture-permeability encapsulating film that can improve the load-bearing performance of components while promoting high reliability and lightweighting of components. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a high-strength hydrophobic and highly reliable encapsulating film, which can effectively improve the reliability of bifacial battery modules, promote the lightweight design of modules, and increase the service life of bifacial battery modules. In addition, a method for preparing the high-strength hydrophobic and highly reliable encapsulating film is also provided.

[0007] To achieve the above objectives, the present invention employs the following technical solution: a high-strength, hydrophobic, and highly reliable encapsulating film, comprising, from top to bottom, an EVA film layer, a high-strength hydrophobic layer, a water-absorbing adhesive layer, and a polyolefin film layer; the upper surface of the EVA film layer and the lower surface of the polyolefin film layer have transverse and longitudinal grooves, forming a grid-like pattern; the lower surface of the high-strength hydrophobic layer has multiple regular first arc structures; the upper surface of the water-absorbing adhesive layer has second arc structures that cooperate with the first arc structures.

[0008] Preferably, the thickness of the EVA film layer is 150–300 μm; the thickness of the high-strength hydrophobic layer is 120–250 μm; the thickness of the water-absorbing adhesive layer is 20–40 μm; and the thickness of the polyolefin film layer is 80–260 μm.

[0009] Preferably, the high-strength hydrophobic layer contains 85%–91% polyvinyl butyral (PVB) copolymer, 8%–10% fluorinated compounds, 0.05%–1.1% light stabilizer, 0.008%–2% antioxidant, 0.3%–2% crosslinking agent, and 0.1%–0.3% silane coupling agent.

[0010] Preferably, the copolymer PVB resin has a density of 1.05–1.10% and a softening temperature of 55°C–65°C, and its copolymer structure is shown in the following formula:

[0011]

[0012] The fluorinated compound is one or a mixture of several of the following: 2-trifluoromethyl-2-acrylic acid resin, heptadecanyltriethoxysilane, and polydodecylfluoroheptyl methacrylate; the light stabilizer is a polymer of succinic acid and 4-hydroxy-2,2,6,6-tetramethyl-1-pyridinylethanol and 2-hydroxy-4-n-octyloxybenzophenone; the antioxidant is a compound of triglyceride bis(3-(3-tert-butyl-4-hydroxy-5-toluenephenyl)acrylate and tris(2,4-di-tert-butylphenyl) phosphite. The crosslinking agent includes a crosslinking curing agent and a co-crosslinking agent. The crosslinking curing agent comprises one or more of the following: 2-ethylhexyl carbonate tert-amyl peroxide, dicumyl peroxide, 1,1-bis(tert-butyl peroxide)-3,3,5-trimethylcyclohexane, 4,4-di(tert-amylperoxy)valerate n-butyl ester, 2-ethylhexyl carbonate tert-butyl peroxide, and 3,3-di(tert-butylperoxy)butyrate ethyl ester. The co-crosslinking agent comprises one or more of the following: tri(2-hydroxyethyl)isocyanurate triacrylate, triallyl cyanurate, pentaerythritol tetraacrylate, trimethylolpropane trimethacrylate, diethylene glycol dimethacrylate, and glycerol derivatives of acrylates. The silane coupling agent is at least one of the following: vinyltriethoxysilane, vinyltriterperoxytert-butylsilane, γ-mercaptopropyltrimethoxysilane, and γ-glycidoxypropyltrimethoxysilane.

[0013] Preferably, the absorbent adhesive layer contains 50-65% ethylene methyl acrylate copolymer (EMA), 8-10% polyvinyl alcohol (PVA), 12%-32% polypropylene ether resin, and 10-15% cellulose.

[0014] Preferably, the EMA resin has an acrylate content of 15%-40%, a melting point of 55-68℃, and a melt index of 3-18 g / 10 min; the polyvinyl alcohol resin has a molecular weight of 35,000 to 100,000; the polypropylene ether resin is a mixture of polypropylene glycol propyl ether and dodecyl alcohol polyoxyethylene polyoxypropylene ether; the cellulose is one or more of hydroxypropyl cellulose ether, hydroxyethyl cellulose, polyvinyl alcohol cellulose, and hydroxypropyl starch ether, and preferably has a particle size of 50-100 mesh and a specific gravity of 1.26-1.31 g / cm3.

[0015] Preferably, the EVA film layer has the following composition by weight percentage: ethylene-vinyl acetate copolymer resin content of 91% to 98%, antioxidant content of 0.01% to 1%, light stabilizer content of 0.01% to 1%, crosslinking agent content of 1% to 2%, and silane coupling agent content of 0.1% to 2%.

[0016] Preferably, the molar content of vinyl acetate in the ethylene-vinyl acetate copolymer resin is 14% to 26%, the melt flow rate of the ethylene-vinyl acetate copolymer resin is 2.5 g / 10 min to 40 g / 10 min, and the volume resistivity is ≥1*10. 15 The melting temperature is between 70 and 100°C. The antioxidant is a compound of triphenyl phosphite and tris(2,4-di-tert-butylphenyl) phosphite. The light stabilizer is a compound of 2-hydroxy-4-dodecyloxybenzophenone and 2-hydroxy-4-n-octyloxybenzophenone. The crosslinking agent includes a crosslinking curing agent and a co-crosslinking agent, wherein the crosslinking curing agent is one or more of 1,1-bis(tert-butylperoxide)cyclohexane, di-tert-butyl peroxide, diisopropylbenzene hydroperoxide, and ethyl 3,3-di(tert-butylperoxide)butyrate; the co-crosslinking agent includes one or more of tris(2-hydroxyethyl)isocyanurate triacrylate, triallyl cyanurate, pentaerythritol tetraacrylate ethoxylate, pentaerythritol tetraacrylate propionate, trimethylolpropane trimethacrylate, and glycerol derivatives of acrylates. The silane coupling agent is at least one of vinyltriethoxysilane, γ-mercaptopropyltriethoxysilane, vinyltriacetoxysilane, and γ-glycidoxypropyltrimethoxysilane.

[0017] Preferably, the polyolefin film layer has the following composition by mass percentage: 91% to 97% polyolefin resin, 0.01% to 1% antioxidant, 0.01% to 1% light stabilizer, 1% to 2% crosslinking agent, and 0.1% to 2% silane coupling agent.

[0018] Preferably, the polyolefin resin is a copolymer of ethylene-butene or ethylene-octene, with a melt flow rate of 3 g / 10 min to 20 g / 10 min, light transmittance > 90%, and volume resistivity ≥ 1.0 × 10⁻⁶. 16 Ω / cm, melting temperature 50–90℃. Density 0.853–0.890 g / cm³ 3The antioxidant is a compound of triphenyl phosphite and tris(2,4-di-tert-butylphenyl) phosphite. The light stabilizer is a compound of 2-hydroxy-4-dodecyloxybenzophenone and 2-hydroxy-4-n-octyloxybenzophenone. The crosslinking agent includes a crosslinking curing agent and a co-crosslinking agent, wherein the crosslinking curing agent is one or more of 1,1-bis(tert-butylperoxide)cyclohexane, di-tert-butyl peroxide, diisopropylbenzene hydrogen peroxide, and ethyl 3,3-di(tert-butylperoxide)butyrate; the co-crosslinking agent includes one or more of tris(2-hydroxyethyl)isocyanurate triacrylate, triallyl cyanurate, pentaerythritol tetraacrylate ethoxylate, pentaerythritol tetraacrylate propionate, trimethylolpropane trimethacrylate, and glycerol derivatives of acrylates. The silane coupling agent is one or more of vinyltriethoxysilane, vinyltritert-butoxysilane, dimethylethoxyvinylsilane, γ-methacryloyloxypropyltrimethoxysilane, vinyltrimethoxysilane, vinyltriacetoxysilane, and vinyltriisopropoxysilane.

[0019] Another aspect of the present invention adopts the following technical solution: a method for preparing a high-strength, hydrophobic, and highly reliable encapsulating film, comprising the following steps:

[0020] Step 1: Preparation of transparent high-strength hydrophobic layer: Polyvinyl butyral (copolymer PVB), fluorinated modified resin, light stabilizer, antioxidant, crosslinking agent and silane coupling agent are added to a mixer for dispersion and mixing according to the proportion, and then added to an extruder for melt extrusion of a high-strength hydrophobic layer with an arc structure.

[0021] Step 2: Preparation of functional film by composite water-absorbing adhesive layer and high-strength hydrophobic layer: After uniformly mixing ethylene methyl acrylate copolymer (EMA), polyvinyl alcohol (PVA), polypropylene ether resin and hydroxypropyl modified fiber in proportion, the mixture is cast and coated onto the arc structure surface of the high-strength hydrophobic layer to form a two-layer composite functional film. The casting temperature is 60-90℃.

[0022] Step 3: Preparation of transparent EVA film layer: Mix EVA, antioxidant, light stabilizer, crosslinking agent and silane coupling agent in proportion and pour into extruder for later use;

[0023] Step 4: Preparation of polyolefin film layer: Mix POE, antioxidant, light stabilizer, crosslinking agent and silane coupling agent in proportion and pour into extruder for later use;

[0024] Step 5: Composite four-layer high-strength hydrophobic and highly reliable encapsulating film: Simultaneously turn on the EVA transparent layer extrusion casting machine and the polyolefin film layer extrusion casting machine, and cast the functional film from Step 2 in the direction of casting and laminating the front side with the transparent EVA film and the back side with the transparent polyolefin film. Then, the upper and lower surfaces are embossed with a grid pattern and then wound up.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] (1) By combining a high-strength hydrophobic layer with a water-absorbing adhesive layer, the water-blocking ability of the composite film is effectively increased.

[0027] (2) The use of EVA film layer and polyolefin film layer on the upper and lower surfaces of the composite film effectively increases the adhesion of the composite film to the glass and backsheet in photovoltaic encapsulation, thereby improving the reliability of the module.

[0028] (3) The composite film body adopts a composite reinforcement design of copolymerized PVB resin and hydroxypropylated modified cellulose, which has high tensile strength, can effectively increase the mechanical properties of the encapsulation component, and promote the lightweight design of the encapsulation component.

[0029] (4) The lower surface of the high-strength hydrophobic layer has multiple arc-shaped embossings. This structure reduces the surface tension of the high-strength hydrophobic layer and improves the hydrophobic effect.

[0030] (5) The upper and lower surfaces of the composite film are respectively made of EVA film and polyolefin film, and the surface is designed with horizontal and vertical grid-shaped embossing, which can effectively increase the degassing efficiency of the module during the lamination process and shorten the lamination time of the module.

[0031] (6) The preparation method of the present invention involves first extruding and casting a high-strength hydrophobic layer, then casting an absorbent adhesive layer onto the embossed surface of the high-strength hydrophobic layer. The two composite films are then laminated with a transparent EVA film on the front and a transparent polyolefin film on the back to form a composite film. The upper and lower surfaces of the composite film are then embossed in a grid pattern and rolled up. The casting method is used to prepare the film layers, which improves the uniformity of the film thickness. In particular, casting the absorbent adhesive layer onto the uneven embossed surface of the high-strength hydrophobic layer allows the grooves of the embossed surface of the high-strength hydrophobic layer to be uniformly filled with absorbent material, increasing the contact area and adhesion between the high-strength hydrophobic layer and the absorbent adhesive layer, and making it less prone to layer slippage. The present invention has the advantages of readily available reaction raw materials and simple operation. All of it uses existing industrial equipment, making it easy to carry out large-scale industrial production. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of a high-strength, water-resistant, and highly reliable encapsulating film according to the present invention;

[0033] Figure 2 This is a side view of a high-strength, water-resistant, and highly reliable encapsulating film according to the present invention;

[0034] Figure 3 This is a 3D schematic diagram of a high-strength, water-resistant, and highly reliable encapsulating film according to the present invention.

[0035] Explanation of reference numerals in the attached figures: 1-EVA film layer; 2-High-strength hydrophobic layer; 3-Water-absorbing adhesive layer; 4-Polyolefin film layer. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] like Figure 1 , Figure 2 and Figure 3 As shown, a high-strength, hydrophobic, and highly reliable encapsulating film includes, from top to bottom, an EVA film layer 1, a high-strength hydrophobic layer 2, a water-absorbing adhesive layer 3, and a polyolefin film layer 4. The upper surface of the EVA film layer 1 and the lower surface of the polyolefin film layer 4 have transverse and longitudinal grooves, forming a grid-like pattern. The lower surface of the high-strength hydrophobic layer 2 has multiple regular first arc structures. This structure reduces the surface tension of the high-strength hydrophobic layer 2, improving its hydrophobic effect. The upper surface of the water-absorbing adhesive layer 3 has a second arc structure that cooperates with the first arc structure.

[0038] In one embodiment, the thickness of the EVA film layer 1 is 150–300 μm; the thickness of the high-strength hydrophobic layer 2 is 120–250 μm; the thickness of the water-absorbing adhesive layer 3 is 20–40 μm; and the thickness of the polyolefin film layer 4 is 80–260 μm.

[0039] In another embodiment, the high-strength hydrophobic layer 2 contains 85%–91% polyvinyl butyral (PVB) content, 8%–10% fluorinated compound content, 0.05%–1.1% light stabilizer content, 0.008%–2% antioxidant content, 0.3%–2% crosslinking agent content, and 0.1%–0.3% silane coupling agent content.

[0040] In this embodiment, the fluorinated compound improves the weather resistance of the high-strength hydrophobic layer 2. Simultaneously, the low surface energy of the CF bonds significantly reduces the surface energy of the hydrophobic film, enhancing its water-blocking ability. Both the high-strength hydrophobic layer 2 and its upper EVA film layer utilize light stabilizers, synergistically improving the light stability of the encapsulating film. A silane coupling agent bridges the gaps between the resin and the components, making the arc-shaped structure formed on the lower surface of the hydrophobic layer less prone to disintegration. Furthermore, optimization of the component ratio results in a dense surface with small pores in the hydrophobic layer, limiting the adsorption and dissolution of water vapor. Combined with its arc-shaped structure, this further enhances the hydrophobic performance.

[0041] In another embodiment, the copolymerized PVB resin has a density of 1.05–1.10% and a softening temperature of 55°C–65°C; the fluorinated compound is one or a mixture of several of 2-trifluoromethyl-2-acrylate resin, heptadecanyltriethoxysilane, and polydodecylfluoroheptyl methacrylate; the light stabilizer is a polymer of succinic acid and 4-hydroxy-2,2,6,6-tetramethyl-1-pyridinylethanol and 2-hydroxy-4-n-octyloxybenzophenone; and the antioxidant is a compound of triglyceride bis(3-(3-tert-butyl-4-hydroxy-5-toluenephenyl)acrylate and tris(2,4-di-tert-butylphenyl) phosphite. The crosslinking agent includes a crosslinking curing agent and a co-crosslinking agent. The crosslinking curing agent includes one or more of the following: 2-ethylhexyl carbonate tert-amyl peroxide, dicumyl peroxide, 1,1-bis(tert-butyl peroxide)-3,3,5-trimethylcyclohexane, 4,4-di(tert-amylperoxy)valerate n-butyl ester, 2-ethylhexyl carbonate tert-butyl peroxide, and 3,3-di(tert-butylperoxy)butyrate ethyl ester. The co-crosslinking agent includes one or more of the following: tri(2-hydroxyethyl)isocyanurate triacrylate, triallyl cyanurate, pentaerythritol tetraacrylate, trimethylolpropane trimethacrylate, diethylene glycol dimethacrylate, and glycerol derivatives of acrylates. The silane coupling agent is at least one of the following: vinyltriethoxysilane, vinyltriterperoxy tert-butylsilane, γ-mercaptopropyltrimethoxysilane, and γ-glycidoxypropyltrimethoxysilane.

[0042] In another embodiment, the absorbent adhesive layer 3 contains 50-65% ethylene methyl acrylate copolymer (EMA), 8-10% polyvinyl alcohol (PVA), 12%-32% polypropylene ether resin, and 10-15% cellulose.

[0043] In this embodiment, the composite film body adopts a design reinforced with copolymerized PVB resin and hydroxypropylated modified cellulose. Because the copolymerized PVB molecules contain long branches, they possess good flexibility and a low glass transition temperature, resulting in high tensile strength and impact resistance for both the hydrophobic layer and the absorbent adhesive layer. Simultaneously, the upper surface of the absorbent adhesive layer 3 has a second arc structure that complements the first arc structure of the high-strength hydrophobic layer 2. The composite structure of the two layers is stable, effectively increasing the mechanical properties of the encapsulated component and promoting lightweight design. Furthermore, through the structural design of the copolymerized PVB resin, the special functional groups on its branches can undergo saponification, esterification of hydroxyl groups, sulfonation, and other reactions, effectively improving the compatibility and adhesion between the layers of the composite film, preventing the migration of metal ions, and enhancing the reliability of the component.

[0044] In another embodiment, the EMA resin has an acrylate content of 15%-40%, a melting point of 55-68°C, and a melt index of 3-18 g / 10 min; the polyvinyl alcohol resin has a molecular weight of 35,000 to 100,000; the polypropylene ether resin is a mixture of polypropylene glycol propyl ether and dodecyl alcohol polyoxyethylene polyoxypropylene ether; the cellulose is one or more of hydroxypropyl cellulose ether, hydroxyethyl cellulose, polyvinyl alcohol cellulose, and hydroxypropyl starch ether, and preferably has a particle size of 50-100 mesh and a specific gravity of 1.26-1.31 g / cm3.

[0045] In another embodiment, the EVA film layer 1 has the following composition by mass percentage: 91% to 98% ethylene-vinyl acetate copolymer resin, 0.01% to 1% antioxidant, 0.01% to 1% light stabilizer, 1% to 2% crosslinking agent, and 0.1% to 2% silane coupling agent.

[0046] In another embodiment, the molar content of vinyl acetate in the ethylene-vinyl acetate copolymer resin is 14% to 26%, the melt flow rate of the ethylene-vinyl acetate copolymer resin is 2.5 g / 10 min to 40 g / 10 min, and the volume resistivity is ≥1*10. 15 The melting temperature is between 70 and 100°C. The antioxidant is a compound of triphenyl phosphite and tris(2,4-di-tert-butylphenyl) phosphite. The light stabilizer is a compound of 2-hydroxy-4-dodecyloxybenzophenone and 2-hydroxy-4-n-octyloxybenzophenone. The crosslinking agent includes a crosslinking curing agent and a co-crosslinking agent, wherein the crosslinking curing agent is one or more of 1,1-bis(tert-butylperoxide)cyclohexane, di-tert-butyl peroxide, diisopropylbenzene hydrogen peroxide, and ethyl 3,3-di(tert-butylperoxide)butyrate; the co-crosslinking agent includes one or more of tris(2-hydroxyethyl)isocyanurate triacrylate, triallyl cyanurate, pentaerythritol tetraacrylate ethoxylate, pentaerythritol tetraacrylate propionate, trimethylolpropane trimethacrylate, and glycerol derivatives of acrylates. The silane coupling agent is at least one of vinyltriethoxysilane, γ-mercaptopropyltriethoxysilane, vinyltriacetoxysilane, and γ-glycidoxypropyltrimethoxysilane.

[0047] In another embodiment, the polyolefin film layer 4 has the following composition by mass percentage: 91% to 97% polyolefin resin, 0.01% to 1% antioxidant, 0.01% to 1% light stabilizer, 1% to 2% crosslinking agent, and 0.1% to 2% silane coupling agent.

[0048] In this embodiment, the polyolefin film layer 4 uses a light stabilizer to further improve the light stability of the composite film. The polyolefin film layer 4 is not directly bonded to the EVA film, but is indirectly bonded to the EVA film through the composite film of water-absorbing adhesive layer 3 and high-strength hydrophobic layer 2. It has good compatibility with the water-absorbing adhesive layer 3 and strong adhesion. No modification or grafting is required to improve the adhesion to the EVA film, saving process and production costs.

[0049] In another embodiment, the polyolefin resin is a copolymer of ethylene-butene or ethylene-octene, with a melt flow rate of 3 g / 10 min to 20 g / 10 min, light transmittance > 90%, and volume resistivity ≥ 1.0 × 10⁻⁶. 16 Ω / cm, melting temperature 50–90℃. Density 0.853–0.890 g / cm³ 3 The antioxidant is a compound of triphenyl phosphite and tris(2,4-di-tert-butylphenyl) phosphite. The light stabilizer is a compound of 2-hydroxy-4-dodecyloxybenzophenone and 2-hydroxy-4-n-octyloxybenzophenone. The crosslinking agent includes a crosslinking curing agent and a co-crosslinking agent, wherein the crosslinking curing agent is one or more of 1,1-bis(tert-butylperoxide)cyclohexane, di-tert-butyl peroxide, diisopropylbenzene hydroperoxide, and ethyl 3,3-di(tert-butylperoxide)butyrate; the co-crosslinking agent includes one or more of tris(2-hydroxyethyl)isocyanurate triacrylate, triallyl cyanurate, pentaerythritol tetraacrylate ethoxylate, pentaerythritol tetraacrylate propionate, trimethylolpropane trimethacrylate, and glycerol derivatives of acrylates. The silane coupling agent is one or more of vinyltriethoxysilane, vinyltritert-butoxysilane, dimethylethoxyvinylsilane, γ-methacryloyloxypropyltrimethoxysilane, vinyltrimethoxysilane, vinyltriacetoxysilane, and vinyltriisopropoxysilane.

[0050] A method for preparing a high-strength, hydrophobic, and highly reliable encapsulating film includes the following steps:

[0051] Step 1: Preparation of transparent high-strength hydrophobic layer 2: According to the proportion, copolymer PVB resin, fluorinated compound modified resin, light stabilizer, antioxidant, crosslinking agent and silane coupling agent are added to the mixer for dispersion and mixing, and then added to the extruder for melt extrusion of high-strength hydrophobic layer 2 with arc structure;

[0052] Step 2: Preparation of functional membrane by composite water-absorbing adhesive layer and high-strength hydrophobic layer 2: After mixing EMA resin, polyolefin resin, polypropylene ether resin and hydroxypropyl modified fiber in proportion, the mixture is cast and coated onto the arc structure surface of the high-strength hydrophobic layer 2 to form a two-layer composite functional membrane. The casting temperature is 60-90℃.

[0053] Step 3: Preparation of transparent EVA film layer 1: Mix EVA, antioxidant, light stabilizer, crosslinking agent and silane coupling agent according to the ratio and pour into the extruder for later use;

[0054] Step 4: Preparation of polyolefin film layer 4: Mix polyolefin resin, antioxidant, light stabilizer, crosslinking agent and silane coupling agent in proportion and pour into extruder for later use;

[0055] Step 5: Composite Four-Layer High-Strength Hydrophobic and High-Reliability Encapsulating Film: Simultaneously operate the EVA transparent layer extrusion casting machine and the polyolefin film layer 4 extrusion casting machine. The functional film from Step 2 is cast and laminated with the transparent EVA film on the front and with the transparent polyolefin film on the back. Then, the upper and lower surfaces are embossed in a grid pattern, and the film is wound up to obtain the four-layer composite high-strength hydrophobic and high-reliability encapsulating film. The simultaneous embossing of the upper and lower layers of the high-strength hydrophobic and high-reliability encapsulating film improves production efficiency and applies pressure to each functional layer during embossing, further enhancing the adhesion between layers and thus improving the mechanical properties of the high-strength hydrophobic and high-reliability encapsulating film.

[0056] Finally, it is packaged and stored.

[0057] The present application will be further described in detail below with reference to specific embodiments. These embodiments should not be construed as limiting the scope of protection claimed in this application. The raw materials are of analytical grade and are calculated by weight percentage.

[0058] Example 1

[0059] The mixture consists of 90% copolymerized PVB resin (density 1.05%, softening temperature 55℃), 4% 2-trifluoromethyl-2-acrylic acid resin, 4% heptadecyltriethoxysilane, 0.1% succinic acid, and 4-hydroxy-2,2,6,6- A polymer of tetramethyl-1-pyridineethanol and a compound of 2-hydroxy-4-n-octyloxybenzophenone, a compound of 0.1% triglyceride bis-3-(3-tert-butyl-4-hydroxy-5-toluenephenyl) acrylate and tris(2,4-di-tert-butylphenyl) phosphite, 0.05% tert-amyl peroxide, 0.05% tert-butyl peroxide, 0.25% trimethylolpropane trimethacrylate and 0.25% diethylene glycol dimethacrylate, and 0.3% vinyltriperoxide tert-butylsilane were added to a mixer for dispersion and mixing, and then fed into an extruder. The temperature of each area of ​​the extruder die was set to 120-150°C for melt extrusion of a high-strength hydrophobic layer with an arc structure. 50% EMA resin (15% acrylate content, melting point 55°C, melt index 3 g / 10 min) and 8% polyvinyl alcohol resin (molecular weight 35,000-100,000) were also added. 16% polypropylene glycol propyl ether, 16% dodecyl alcohol polyoxyethylene polyoxypropylene ether, and 10% hydroxypropyl cellulose ether (particle size 50-100 mesh, specific gravity 1.26-1.31 g / cm3) are mixed evenly and then cast onto the arc-shaped structure of the high-strength hydrophobic layer to form a two-layer composite functional film. The casting temperature is 60-90℃. 98% ethylene-vinyl acetate copolymer resin, wherein the molar content of vinyl acetate in the ethylene-vinyl acetate copolymer resin is 26%, the melt flow rate of the ethylene-vinyl acetate copolymer resin is 10 g / 10 min, and the volume resistivity is ≥1*10⁻⁶. 15 The following mixtures were used to form an EVA film: 0.1% triphenyl phosphite and tris(2,4-di-tert-butylphenyl) phosphite, 0.1% 2-hydroxy-4-dodecyloxybenzophenone and 2-hydroxy-4-n-octyloxybenzophenone, 0.6% di-tert-butyl peroxide, 0.45% tris(2-hydroxyethyl)isocyanurate triacrylate and 0.45% pentaerythritol tetraacrylate, and 0.3% γ-methacryloyloxypropyltrimethoxysilane were mixed and extruded into an extruder; 97% polyolefin resin (a copolymer of ethylene-butene and ethylene-octene with a mass ratio of 1:1), a melt flow rate of 20 g / 10 min, a light transmittance >90%, a volume resistivity ≥1.0×10¹⁶ Ω / cm, a melt temperature of 90℃, and a density of 0.890 g / cm³. 3A mixture of 0.2% triphenyl phosphite and tris(2,4-di-tert-butylphenyl) phosphite, 0.2% 2-hydroxy-4-dodecyloxybenzophenone and 2-hydroxy-4-n-octyloxybenzophenone, 0.8% di-tert-butyl peroxide, 0.6% tris(2-hydroxyethyl)isocyanurate triacrylate, 0.6% pentaerythritol tetraacrylate, 0.4% γ-methacryloyloxypropyltrimethoxysilane, and 0.2% vinyltrimethoxysilane was poured into an extruder and extruded into a polyolefin film. The two-layer composite functional film was cast and laminated with a transparent EVA film on the front side and a transparent polyolefin film on the back side. The top and bottom surfaces were then embossed with a grid pattern and wound up.

[0060] Example 2

[0061] The mixture comprises 86% copolymerized PVB resin (density 1.05%, softening temperature 55℃), 5% heptadecafluorodecyltriethoxysilane, 5% polydodecylfluoroheptyl methacrylate, 0.8% a polymer of succinic acid and 4-hydroxy-2,2,6,6-tetramethyl-1-pyridinylethanol, a complex of 2-hydroxy-4-n-octyloxybenzophenone, 1.5% a compound of triglycerides bis-3-(3-tert-butyl-4-hydroxy-5-toluenephenyl)acrylate and tris(2,4-di-tert-butylphenyl) phosphite, 0.55% 1,1-bis(tert-butylperoxide)-3,3,5-trimethylcyclohexane, and 0.55% 4,4- Di(tert-amyl peroxy)valerate, 0.5% triallyl cyanurate, 0.05% γ-mercaptopropyltrimethoxysilane, and 0.05% γ-glycidyl etheroxypropyltrimethoxysilane were added to a mixer for dispersion and mixing, and then fed into an extruder. The temperature of each area of ​​the extruder die was set to 120-150℃ for melt extrusion of a high-strength hydrophobic layer with an arc-shaped structure. 55% EMA resin (15% acrylate content, melting point 55℃, melt index 3 / 10min), 8% polyvinyl alcohol resin (molecular weight 35,000-100,000), and 15% polypropylene glycol propylene glycol were also added. A mixture of 12% dodecyl alcohol polyoxyethylene polyoxypropylene ether, 5% hydroxyethyl cellulose, and 5% polyvinyl alcohol cellulose (all cellulose particles with a particle size of 50-100 mesh and a specific gravity of 1.26-1.31 g / cm³) is uniformly cast and coated onto the arc-shaped surface of the high-strength hydrophobic layer to form a two-layer composite functional film. The casting temperature is 60-90℃. 92% ethylene-vinyl acetate copolymer resin, wherein the molar content of vinyl acetate in the ethylene-vinyl acetate copolymer resin is 26%, the melt flow rate of the ethylene-vinyl acetate copolymer resin is 40 g / 10 min, and the volume resistivity is ≥ 1*10⁻⁶. 15A mixture of 0.05% triphenyl phosphite and tris(2,4-di-tert-butylphenyl) phosphite, 1% 2-hydroxy-4-dodecyloxybenzophenone and 2-hydroxy-4-n-octyloxybenzophenone, 1% di-tert-butyl peroxide, 2% triallyl cyanurate, and 1% γ-mercaptopropyltriethoxysilane was extruded into an EVA film. 92% polyolefin resin, a copolymer of ethylene-butene and ethylene-octene with a mass ratio of 1:1, a melt flow rate of 20 g / 10 min, transmittance >90%, volume resistivity ≥1.0 × 10¹⁶ Ω / cm, a melt temperature of 90℃, and a density of 0.890 g / cm³, was used. The mixture of 1% triphenyl phosphite and tris(2,4-di-tert-butylphenyl) phosphite... A compound of di-tert-butylphenyl ester, a compound of 1% 2-hydroxy-4-dodecyloxybenzophenone and 2-hydroxy-4-n-octyloxybenzophenone, 0.8% di-tert-butyl peroxide, 0.6% tris(2-hydroxyethyl)isocyanurate triacrylate, 0.6% pentaerythritol tetraacrylate, 0.4% γ-methacryloyloxypropyltrimethoxysilane and 0.2% vinyltrimethoxysilane are mixed and extruded into a polyolefin film. The two-layer composite functional film is cast and laminated with a transparent EVA film on the front side and a transparent polyolefin film on the back side. Then, the top and bottom surfaces are embossed with a grid pattern and wound up.

[0062] Example 3

[0063] The mixture consists of 87% copolymerized PVB resin (density 1.10%, softening temperature 65℃), 2% 2-trifluoromethyl-2-acrylate resin, 2% heptadecanyltriethoxysilane, 6% polydodecylfluoroheptyl methacrylate, 1.1% a polymer of succinic acid and 4-hydroxy-2,2,6,6-tetramethyl-1-pyridinylethanol with 2-hydroxy-4-n-octyloxybenzophenone, 1.4% a compound of triglycerides bis-3-(3-tert-butyl-4-hydroxy-5-toluenephenyl)acrylate and tris(2,4-di-tert-butylphenyl) phosphite, 0.1% tert-butyl peroxide, 0.1% ethyl 3,3-di(tert-butylperoxy)butyrate, and 0.1% pentaerythritol tetraacrylate. 0.2% vinyltriethoxysilane was added to a mixer for dispersion and mixing, and then added to an extruder. The temperature of each area of ​​the extruder die was set to 120-150℃ for melt extrusion of a high-strength hydrophobic layer with an arc structure. 58% EMA resin (40% acrylate content, melting point 68℃, melt index 18g / 10min), 8% polyvinyl alcohol resin (molecular weight 35,000-100,000), 10% polypropylene glycol propylene ether, 9% dodecyl alcohol polyoxyethylene polyoxypropylene ether, and 5% hydroxypropyl cellulose ether and hydroxyethyl... A mixture of 5% cellulose and 5% polyvinyl alcohol cellulose (particle size 50-100 mesh, specific gravity 1.26-1.31 g / cm3) is uniformly cast and coated onto the arc-shaped structure of the high-strength hydrophobic layer to form a two-layer composite functional film. The casting temperature is 60-90℃. 93% ethylene-vinyl acetate copolymer resin, wherein the molar content of vinyl acetate in the ethylene-vinyl acetate copolymer resin is 26%, the melt flow rate of the ethylene-vinyl acetate copolymer resin is 40 g / 10 min, and the volume resistivity is ≥1*10⁻⁶. 15 A mixture of 0.05% triphenyl phosphite and tris(2,4-di-tert-butylphenyl) phosphite, 1% 2-hydroxy-4-dodecyloxybenzophenone and 2-hydroxy-4-n-octyloxybenzophenone, 0.5% dicumyl peroxide, 1% pentaerythritol tetraacrylate, and 1% vinyltriacetoxysilane was extruded into an EVA film. 93% polyolefin resin, a copolymer of ethylene-butene and ethylene-octene with a mass ratio of 1:1, a melt flow rate of 20 g / 10 min, a light transmittance >90%, a volume resistivity ≥1.0 × 10¹⁶ Ω / cm, a melt temperature of 90℃, and a density of 0.890 g / cm³ was also used. 3A mixture of 1% triphenyl phosphite and tris(2,4-di-tert-butylphenyl) phosphite, 1% 2-hydroxy-4-dodecyloxybenzophenone and 2-hydroxy-4-n-octyloxybenzophenone, 0.8% di-tert-butyl peroxide, 0.6% tris(2-hydroxyethyl)isocyanurate triacrylate and 0.6% pentaerythritol tetraacrylate, 0.7% γ-methacryloyloxypropyltrimethoxysilane and 0.3% vinyltrimethoxysilane was poured into an extruder and extruded into a polyolefin film. The two-layer composite functional film was cast and laminated with a transparent EVA film on the front side and a transparent polyolefin film on the back side. Then, the top and bottom surfaces were embossed with a grid pattern and wound up.

[0064] Example 4

[0065] 89% copolymerized PVB resin (density 1.10%, softening temperature 65℃), 9% 2-trifluoromethyl-2- Acrylic resin, a polymer of 0.6% succinic acid and 4-hydroxy-2,2,6,6-tetramethyl-1-pyridinylethanol and a complex of 2-hydroxy-4-n-octyloxybenzophenone, a compound of 1% triglyceride bis-3-(3-tert-butyl-4-hydroxy-5-toluenephenyl) acrylate and tris(2,4-di-tert-butylphenyl) phosphite, 0.7% 2-ethylhexyl tert-amyl carbonate, 0.15% trimethylolpropane trimethacrylate, 0.15% diethylene glycol dimethacrylate, 0.15% vinyltriperoxide tert-butylsilane, and 0.15% γ-mercaptopropyltrimethoxysilane were added to a mixer for dispersion and mixing, and then fed into an extruder. The temperature of each area of ​​the extruder die was set to 120-150°C for melt extrusion of a high-strength hydrophobic layer with an arc-shaped structure; 62% EMA A mixture of resin (40% acrylate content, melting point 68℃, melt index 18g / 10min), 8% polyvinyl alcohol resin (molecular weight 35,000–100,000), 10% polypropylene glycol propylene ether, 5% dodecyl alcohol polyoxyethylene polyoxypropylene ether, 10% polyvinyl alcohol cellulose, and 5% hydroxypropyl starch ether (all cellulose particles are 50–100 mesh, specific gravity 1.26–1.31 g / cm³) is uniformly mixed and then cast onto the arc-shaped surface of the high-strength hydrophobic layer to form a two-layer composite functional film. The casting temperature is 60–90℃. 95% ethylene-vinyl acetate copolymer resin, wherein the molar content of vinyl acetate is 14%, the melt flow rate of the ethylene-vinyl acetate copolymer resin is 40g / 10min, and the volume resistivity is ≥1*10⁻⁶. 15The following mixtures were used: 1% triphenyl phosphite and tris(2,4-di-tert-butylphenyl) phosphite, 0.05% 2-hydroxy-4-dodecyloxybenzophenone and 2-hydroxy-4-n-octyloxybenzophenone, 0.05% ethyl 3,3-di(tert-butylperoxy)butyrate, 0.5% pentaerythritol tetraacrylate, and 0.01% γ-glycidyl etheroxypropyltrimethoxysilane were mixed and extruded into EVA film; 94% polyolefin resin (a copolymer of ethylene-butene and ethylene-octene with a mass ratio of 1:1), melt flow rate of 20 g / 10 min, light transmittance >90%, volume resistivity ≥1.0×10¹⁶ Ω / cm, melt temperature of 90℃, and density of 0.890 g / cm³. 3 A mixture of 1% triphenyl phosphite and tris(2,4-di-tert-butylphenyl) phosphite, 1% 2-hydroxy-4-dodecyloxybenzophenone and 2-hydroxy-4-n-octyloxybenzophenone, 0.8% di-tert-butyl peroxide, 0.6% tris(2-hydroxyethyl)isocyanurate triacrylate and 0.6% pentaerythritol tetraacrylate, 1.4% γ-methacryloyloxypropyltrimethoxysilane and 0.6% vinyltrimethoxysilane were poured into an extruder and extruded to form a polyolefin film. The two-layer composite functional film was cast and laminated with a transparent EVA film on the front side and a transparent polyolefin film on the back side. Then, the top and bottom surfaces were embossed with a grid pattern and wound up.

[0066] Example 5

[0067] A polymer of 91% copolymerized PVB resin (density 1.10%, softening temperature 65℃), 8% heptadecanyltriethoxysilane, 0.05% succinic acid, and 4-hydroxy-2,2,6,6-tetramethyl-1-pyridinylethanol was mixed with 2- A complex of hydroxy-4-n-octyloxybenzophenone, 0.008% triglyceride bis-3-(3-tert-butyl-4-hydroxy-5-toluenephenyl) acrylate and tris(2,4-di-tert-butylphenyl) phosphite, 0.412% 2-ethylhexyl carbonate tert-butyl peroxide, 0.23% glycerol acrylate derivative, and 0.3% γ-glycidyl etheroxypropyltrimethoxysilane were added to a mixer for dispersion and mixing, and then fed into an extruder. The temperature of each area of ​​the extruder die was set to 120-150℃ for melt extrusion of a high-strength hydrophobic layer with an arc-shaped structure. 65% EMA resin (40% acrylate content, melting point 68℃) was also added. A mixture of 8% polyvinyl alcohol resin (molecular weight 35,000–100,000), 6% polypropylene glycol propylene ether, 6% dodecyl alcohol polyoxyethylene polyoxypropylene ether, and 15% polyvinyl alcohol cellulose (particle size 50–100 mesh, specific gravity 1.26–1.31 g / cm³) with a melt index of 18 g / 10 min, is uniformly cast and coated onto the arc-shaped surface of the high-strength hydrophobic layer to form a two-layer composite functional film. The casting temperature is 60–90 °C. 97% ethylene-vinyl acetate copolymer resin, wherein the molar content of vinyl acetate is 14%, the melt flow rate of the ethylene-vinyl acetate copolymer resin is 40 g / 10 min, and the volume resistivity is ≥1*10⁻⁶. 15The following mixture, with a melting temperature of 100℃, consists of 1% triphenyl phosphite and tris(2,4-di-tert-butylphenyl) phosphite, 0.5% 2-hydroxy-4-dodecyloxybenzophenone and 2-hydroxy-4-n-octyloxybenzophenone, 0.25% 1,1-bis(tert-butylperoxide)cyclohexane, 0.25% di-tert-butyl peroxide, 0.05% trimethylolpropane trimethacrylate, 0.05% glycerol derivative of acrylate, 0.5% vinyltriethoxysilane, and 0.4% γ-mercaptopropyltriethoxysilane. The mixture is then extruded into an EVA film. 97% polyolefin resin, a copolymer of ethylene-butene and ethylene-octene with a mass ratio of 1:1, has a melt flow rate of 20 g / 10 min, a light transmittance >90%, and a volume resistivity ≥ A polyolefin film is formed by mixing a compound of 0.1% triphenyl phosphite and tris(2,4-di-tert-butylphenyl) phosphite with a strength of 1.0 × 10¹⁶ Ω / cm, a melting temperature of 90℃, a density of 0.890 g / cm³, 0.1% triphenyl phosphite and tris(2,4-di-tert-butylphenyl) phosphite, 0.9% 2-hydroxy-4-dodecyloxybenzophenone and 2-hydroxy-4-n-octyloxybenzophenone, 0.4% di-tert-butyl peroxide, 0.3% tris(2-hydroxyethyl)isocyanurate triacrylate, 0.3% pentaerythritol tetraacrylate, 0.6% γ-methacryloyloxypropyltrimethoxysilane and 0.4% vinyltrimethoxysilane, and then extruding the mixture into an extruder. The two-layer composite functional film is then cast and laminated with a transparent EVA film on the front side and a transparent polyolefin film on the back side. The top and bottom surfaces are then embossed with a grid pattern and wound up.

[0068] Examples 6-9

[0069] Examples 6, 7, 8, and 9 were prepared according to the method of Example 1, and the thicknesses of each layer are shown in the table below.

[0070] Comparative Example 1

[0071] Prepared according to the method for preparing EVA film layer in Example 1.

[0072] Comparative Example 2

[0073] Prepared according to the method for preparing polyolefin film layers in Example 1.

[0074] Tests were conducted on the water vapor permeability, tensile strength, UV aging, and DH aging performance of the encapsulating film.

[0075] The thicknesses of each layer and related physical performance parameters of Examples 6-9 and Comparative Examples 1-2 are shown in the table below:

[0076]

[0077]

[0078] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0079] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A high-strength, hydrophobic, high-reliability encapsulation adhesive film, characterized by: It comprises EVA adhesive film layer, high-strength hydrophobic layer, water-absorbing adhesive layer and polyolefin adhesive film layer arranged from top to bottom; the upper surface of the EVA adhesive film layer and the lower surface of the polyolefin adhesive film layer have transverse and longitudinal grooves in the shape of a checkered pattern; the lower surface of the high-strength hydrophobic layer has a plurality of regular first circular arc structures; the upper surface of the water-absorbing adhesive layer has second circular arc structures matched with the first circular arc structures; The EMA resin content in the water-absorbing adhesive layer is 50-65%, the polyvinyl alcohol (PVA) content is 8-10%, the polypropylene ether resin content is 12-32%, and the cellulose content is 10-15%; The EMA resin has an acrylic ester content of 15%-40%, a melting point of 55-68℃, and a melt index of 3-18g / 10min; the polyvinyl alcohol resin has a molecular weight of 3.5-100,000; the polypropylene ether resin is a mixture of polypropylene glycol propyl ether and dodecanol polyoxyethylene polyoxypropyl ether; the cellulose is one or more of hydroxypropyl cellulose ether, hydroxyethyl cellulose, polyvinyl alcohol cellulose, and hydroxypropyl starch ether, and has a particle size of 50-100 mesh and a specific gravity of 1.26-1.31g / cm 3 .

2. The high-strength, hydrophobic, high-reliability encapsulation adhesive film of claim 1, wherein: The thickness of the EVA adhesive film layer is 150-300 μm; the thickness of the high-strength hydrophobic layer is 120-250 μm; the thickness of the water-absorbing adhesive layer is 20-40 μm; and the thickness of the polyolefin adhesive film layer is 80-260 μm.

3. The high-strength, hydrophobic, high-reliability encapsulation film of claim 1, wherein: The copolymerized PVB resin content in the high-strength hydrophobic layer is 85-91%, the fluorine-containing compound content is 8-10%, the light stabilizer content is 0.05-1.1%, the antioxidant content is 0.008-2%, the crosslinking agent content is 0.3-2%, and the silane coupling agent content is 0.1-0.3%.

4. The high-strength, hydrophobic, high-reliability encapsulation film of claim 3, wherein: The copolymerized PVB resin density is 1.05-1.10%, and the softening temperature is 55-65℃, and the copolymerized structure is as shown in the following formula: The fluorine-containing compound is a mixture of one or more of 2-trifluoromethyl-2-propenoic acid resin, heptadecafluorocyclopentyl triethoxysilane and poly(methyl propenoic acid dodecafluoroheptyl ester); the light stabilizer is a complex of a polymer of succinic acid and 4-hydroxy-2,2,6,6-tetramethyl-1-pyridine ethanol and 2-hydroxy-4-n-octyloxybenzophenone; the antioxidant is a complex of triacylglycerol bis 3-(3-tert-butyl-4-hydroxy-5-methyl phenyl) propionic acid ester and tris(2,4-di-tert-butyl phenyl) phosphite; the crosslinking agent includes crosslinking curing agent and co-crosslinking agent, wherein the crosslinking curing agent includes one or more of 2-ethylhexyl peroxide, diisopropylbenzene peroxide, 1,1-bis(tert-butyl peroxide)-3,3,5-trimethylcyclohexane, n-butyl 4,4-di(tert-pentyl peroxide) valerate, 2-ethylhexyl peroxide, 3,3-di(tert-butyl peroxide) butyric acid ethyl ester; the co-crosslinking agent includes a mixture of one or more of tris(2-hydroxyethyl) isocyanuric acid triacrylate, trimeric cyanuric acid triallyl ester, propylene oxide pentaerythritol tetraacrylate, trimethylolpropane trimethylacrylate, diethylene glycol dimethacrylate and acrylate glycerol derivative; and the silane coupling agent is at least one of vinyl triethoxysilane, vinyl triperoxo-tert-butyl silane, γ-mercapto propyl trimethoxysilane and γ-glycidyl ether oxygen propyl trimethoxysilane.

5. The high-strength hydrophobic and highly reliable packaging adhesive film according to claim 1, characterized in that: The EVA adhesive film layer mass percentage composition comprises: ethylene-vinyl acetate copolymer resin content of 91% to 98%, antioxidant content of 0.01% to 1%, light stabilizer content of 0.01% to 1%, crosslinking agent content of 1% to 2%, and silane coupling agent content of 0.1% to 2%. 6.The high-strength hydrophobic high-reliability packaging adhesive film according to claim 5, characterized in that: The molar content of vinyl acetate in the ethylene-vinyl acetate copolymer resin is 14% to 26%, the melt flow rate of the ethylene-vinyl acetate copolymer resin is 2.5 g / 10 min to 40 g / 10 min, the volume resistivity is ≥1*10 15 , the melting temperature is 70 to 100℃; the antioxidant is a compound of triphenyl phosphite and tris(2,4-di-tert-butylphenyl) phosphite; the light stabilizer is a compound of 2-hydroxy-4-dodecyloxybenzophenone and 2-hydroxy-4-n-octyloxybenzophenone; the crosslinking agent includes a crosslinking curing agent and a co-crosslinking agent, wherein the crosslinking curing agent is one or more of 1,1-bis(tert-butyl peroxy)cyclohexane, di-tert-butyl peroxide, diisopropylbenzene hydroperoxide, and ethyl 3,3-di(tert-butyl peroxy)butyrate; the co-crosslinking agent includes one or more of tris(2-hydroxyethyl) isocyanuric acid triacrylate, triallyl cyanurate, ethoxylated pentaerythritol tetraacrylate, propoxylated pentaerythritol tetraacrylate, trimethylolpropane trimethacrylate, and acrylate glycerol derivatives; and the silane coupling agent is at least one of vinyltriethoxysilane, γ-mercaptopropyl triethoxysilane, vinyltriacetoxysilane, and γ-glycidyl ether propyltrimethoxysilane. 7.The high-strength hydrophobic high-reliability packaging adhesive film according to claim 1, characterized in that: The polyolefin adhesive film layer mass percentage composition comprises: polyolefin resin content of 91% to 97%, antioxidant content of 0.01% to 1%, light stabilizer content of 0.01% to 1%, crosslinking agent content of 1% to 2%, and silane coupling agent content of 0.1% to 2%. 8.The high-strength hydrophobic high-reliability packaging adhesive film according to claim 7, characterized in that: The polyolefin resin is a copolymer of ethylene-butene or ethylene-octene, with a melt flow rate of 3-20 g / 10 min, a light transmittance of >90%, a volume resistivity of ≥1.0×1016 Ω / cm, a melting temperature of 50-90℃, and a density of 0.853-0.890 g / cm 3 The antioxidant is a complex of triphenyl phosphite and tris(2,4-di-tert-butylphenyl) phosphite; the light stabilizer is a complex of 2-hydroxy-4-dodecyloxybenzophenone and 2-hydroxy-4-n-octyloxybenzophenone; the crosslinking agent includes a crosslinking curing agent and a co-crosslinking agent, wherein the crosslinking curing agent is one or more of 1,1-bis(tert-butyl peroxy)cyclohexane, di-tert-butyl peroxide, diisopropylbenzene hydroperoxide, and ethyl 3,3-di(tert-butyl peroxy)butyrate; the co-crosslinking agent includes one or more of tris(2-hydroxyethyl) isocyanuric acid triacrylate, triallyl cyanurate, ethoxylated pentaerythritol tetraacrylate, propoxylated pentaerythritol tetraacrylate, trimethylolpropane trimethacrylate, and acrylate glycerol derivatives; and the silane coupling agent is one or more of vinyl triethoxysilane, vinyl tri-tert-butoxysilane, dimethyl ethoxy vinyl silane, gamma-methacryloyloxypropyl trimethoxysilane, vinyl trimethoxysilane, vinyl triacetoxy silane, and vinyl triisopropoxy silane.

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