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Pre-crosslinked black high-adhesion flame-retardant packaging adhesive film and preparation method thereof

An encapsulating film, high-bond technology, applied in the direction of non-polymer adhesive additives, adhesives, film/sheet adhesives, etc. Affect the appearance of components and other issues, to reduce the risk of combustion, increase adhesion, and improve reliability.

Pending Publication Date: 2021-07-23
CHANGZHOU SVECK PHOTOVOLTAIC NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of encapsulating components with black film, it is often because the black pigment is not uniformly dispersed, the black film is easy to overflow, which affects the appearance of the component, and the difference in weather resistance caused by the difference in the choice of pigments for the black film, etc., can not meet the needs of users. There are aesthetic requirements for component applications, and in order to solve the overflow problem, fluid resin or pre-crosslinking technology is generally used. Although the appearance problem is solved, its poor adhesion to glass or backplane will also lead to component reliability. There are risks, so domestic and foreign are constantly researching and improving the black film

Method used

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  • Pre-crosslinked black high-adhesion flame-retardant packaging adhesive film and preparation method thereof
  • Pre-crosslinked black high-adhesion flame-retardant packaging adhesive film and preparation method thereof

Examples

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preparation example Construction

[0037] A method for preparing a pre-crosslinked black high-adhesion flame-retardant packaging film, characterized in that: the specific steps are as follows:

[0038] The first step: Acidify the expanded graphite to be used. The method is: in a three-necked flask, add expanded graphite with a liquid mass of 3%~5% to a 1mol / L acetic acid solution under stirring, and heat up to 80°C. After reacting for about 12 hours, wash with deionized water repeatedly until the pH value is neutral, and then dry at room temperature for at least 48 hours to constant weight to obtain acidified expanded graphite.

[0039] The second step: carry out surface modification treatment on molybdenum disulfide. The method is: in a three-necked flask, first heat ethanol to 60°C, then add water and coupling agent in turn according to the mass ratio under stirring, and add Add molybdenum disulfide after 1 minute, continue stirring at 60°C for 60 minutes, then distill ethanol at 70°C, and finally dry at 120°...

Embodiment 1

[0048] The first step is the formula design of the black flame retardant film layer:

[0049] Main material: ethylene-vinyl acetate copolymer (EVA), which is made by mixing EVA resin with 18% VA content and EVA resin with 26% VA content according to the weight ratio of 1:1.

[0050] Antioxidant: the main antioxidant is β-(3,5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate, and the auxiliary antioxidant is triphenyl phosphite according to the weight ratio of 1: 2 ratio mix.

[0051] Cross-linking agent: the cross-linking curing agent is a compound of 2-ethylhexyl peroxide tert-butyl carbonate and ethyl 3,3-di(tert-butyl peroxy)butyrate; the auxiliary cross-linking agent is triallyl Hydroxyl isocyanurate, triallyl cyanurate and trimethylolpropane trimethacrylate are mixed in any proportion.

[0052] Silane coupling agent: Vinyl tris(β-methoxyethoxy) silane and vinyl triacetoxy silane are compounded at a molar ratio of 1:1.

[0053] Light stabilizer: bis(2,2,6,6-tetrameth...

Embodiment 2

[0067] The first step is the formula design of the black flame retardant film layer:

[0068] Main material: Ethylene-vinyl acetate copolymer (EVA), which is made by mixing EVA resin with 14% VA content and EVA resin with 26% VA content according to the weight ratio of 1:2.

[0069] Antioxidant: The main antioxidant is β-(3,5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate, and the secondary antioxidant is tris(4-nonylphenol) phosphorous acid ester and tris(2,4-di-tert-butylphenyl)phosphite are mixed in any proportion.

[0070] Cross-linking agent: the cross-linking curing agent is a compound of tert-amyl peroxide 2-ethylhexyl carbonate and ethyl 3,3-di(tert-butylperoxy)butyrate; the auxiliary cross-linking agent is propoxylated pentaerythritol Tetraacrylate, triallyl cyanurate and trimethylolpropane trimethacrylate are mixed in any proportion.

[0071] Silane coupling agent: Vinyl tri(β-methoxyethoxy) silane and vinyl triacetoxy silane are compounded at a molar ratio of...

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Abstract

The invention relates to a pre-crosslinked black high-adhesion flame-retardant packaging adhesive film and a preparation method thereof. The pre-crosslinked black high-adhesion flame-retardant packaging adhesive film comprises an upper-layer black flame-retardant packaging adhesive film and a lower-layer high-adhesion layer, and the upper-layer black flame-retardant packaging adhesive film is prepared from, by mass, 100 parts of ethylene-vinyl acetate copolymer resin, 20-100 parts of halogen-free flame-retardant efficient flame retardant, 2-10 parts of high-dispersion black filler, 0.02-1 part of an antioxidant, 0.005-0.5 part of a light stabilizer, 1-2 parts of a cross-linking agent and 0.5-3 parts of a silane coupling agent. The lower-layer high-adhesion layer is prepared from the following components in parts by mass: 100 parts of ethylene-acrylic acid-vinyl alcohol copolymer resin, 0.02-1 part of an antioxidant, 1-2 parts of a cross-linking agent and 0.2-1 part of a silane coupling agent. Through compounding of an inorganic flame-retardant system, the flame-retardant performance of the packaging adhesive film can be effectively improved, the operating temperature of outdoor power generation can be effectively reduced for a high-power assembly, and the combustion risk of the assembly is reduced.

Description

technical field [0001] The invention relates to the technical field of photovoltaic modules, in particular to a pre-crosslinked black high-adhesion flame-retardant encapsulating adhesive film and a preparation method thereof. Background technique [0002] In the past ten years, due to technological progress and the influence of the national photovoltaic policy, my country's photovoltaic industry has developed very rapidly. Since photovoltaic parity went online, the photovoltaic industry has higher and higher requirements for cost reduction and efficiency increase. At present, with the rapid development of battery technology, the conversion efficiency of high-efficiency batteries such as PREC, Topcon and HJT batteries is getting higher and higher, and the conversion efficiency of mass-produced batteries can reach more than 23.0%. , large silicon wafer cells of 166, 182 and 210 appeared, combined with module layout design, shingled modules, half-cell modules, MBB modules, or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/08C09J11/06C09J11/04C09J7/10C09J7/30
CPCC08K2003/323C08L2201/02C08L2205/025C09J11/04C09J11/06C09J123/0853C09J123/0869C09J2203/322C09J2423/04C09J7/10C09J7/30C08L23/0853C08K9/00C08K7/24C08K3/32C08K5/1345C08K5/526
Inventor 张刚吕松黄宝玉季志超徐炜琴杨求平吴斌吴丰华刘俊陈书亮
Owner CHANGZHOU SVECK PHOTOVOLTAIC NEW MATERIAL
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