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Multilayer coextruded anti-polarization composite adhesive film and preparation method thereof

A multi-layer co-extrusion and anti-polarization technology, applied in the direction of non-polymer organic compound adhesives, adhesives, adhesive additives, etc., can solve the problem of reducing the light transmittance and volume resistivity of the adhesive film, and reducing the power generation efficiency of the cell , reduce power generation efficiency of components and other issues, achieve the effects of reducing light transmittance and volume resistivity, improving anti-PID performance, and reducing power generation efficiency

Inactive Publication Date: 2019-07-23
CHANGZHOU SVECK PHOTOVOLTAIC NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the power generation process of the solar photovoltaic module, a negative voltage will be generated through the outer frame, which will cause the sodium ions and potassium ions in the glass to pass through the adhesive film layer to reach the surface of the battery sheet, and accumulate on the surface of the battery sheet to form a positive electric field, thereby causing the battery The accumulation of negative charges inside the cell forms a negative electric field to counterbalance, reducing the carriers in the cell, thereby reducing the power generation efficiency of the cell and causing the PID phenomenon
[0003] Taineng photovoltaic modules will be eroded and penetrated by water vapor when used outdoors for a long time. Water vapor will penetrate into the module through the back plate and glass. If the conventional EVA packaging film is used, because the VA segment in the EVA molecular segment encounters Water vapor will degrade, release acetic acid, produce bubbles, delamination and yellowing, reduce the light transmittance and volume resistivity of the adhesive film, and reduce the potential on the cell, thereby reducing the power generation efficiency of the module and shortening the service life of the module

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] (1) Mix 100 parts of POE resin (melt flow rate is 18g / 10min, light transmittance > 90%, volume resistivity ≥ 1.0×10 15 , melting temperature is 64°C), 0.9 parts of tert-amyl peroxide 2-ethylhexylate, 0.8 parts of tripropenyl isocyanurate, 0.4 parts of vinyltriacetoxysilane, 0.15 parts of dihydroxy-tetra- n-octylhydroxybenzophenone, 0.15 parts of 2-(2-hydroxy-3,5-di-tert-butylphenyl)-5-chlorinated benzotriazole, 0.2 parts of β-(3,5-di tert-butyl-4-hydroxyphenyl) n-octadecyl propionate was mixed evenly, and poured into the silo of the first single-screw extruder for use; (2) 100 parts of EAA resin, 0.9 parts of Oxidized tert-amyl 2-ethylhexylate, 0.8 parts of tripropenyl isocyanurate, 0.4 parts of vinyltriacetoxysilane, 0.15 parts of dihydroxy-tetra-n-octylhydroxybenzophenone, 0.15 parts Parts of 2-(2-hydroxy-3,5-di-tert-butylphenyl)-5-chlorinated benzotriazole, 0.2 parts of β-(3,5-di-tert-butyl-4-hydroxyphenyl)propane Mix n-octadecanyl acid ester evenly, pour it into t...

Embodiment 2

[0078] (1) Mix 100 parts of POE resin (melt flow rate is 14g / 10min, light transmittance > 90%, volume resistivity ≥ 1.0×10 15 , melting temperature is 58°C), 0.8 parts of tert-butyl peroxy-2-ethylhexyl carbonate, 0.3 parts of ethoxylated pentaerythritol tetraacrylate, 0.6 parts of tripropenyl isocyanurate, 0.5 parts of γ-methacrylic acid Acyloxypropyltrimethoxysilane, 0.1 part of bis(2,2,6,6-tetramethylpiperidinyl) sebacate, 0.1 part of 2,2-dihydroxy-4-methoxydiphenyl Methanone, 0.1 part of triethylene glycol bis[β-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionate] mixed evenly, poured into the first single-screw extruder In the silo, ready for use; (2) 100 parts of EMA resin, 0.8 part of tert-butyl peroxy-2-ethylhexyl carbonate, 0.3 part of ethoxylated pentaerythritol tetraacrylate, 0.6 part of tripropenyl isocyanurate , 0.5 parts of γ-methacryloxypropyltrimethoxysilane, 0.1 parts of bis(2,2,6,6-tetramethylpiperidinyl) sebacate, 0.1 parts of 2,2-dihydroxy - 4-Methoxybenzoph...

Embodiment 3

[0081] (1) Mix 100 parts of POE resin (melt flow rate is 14g / 10min, light transmittance > 90%, volume resistivity ≥ 1.0×10 15 , melting temperature is 58°C), 0.6 parts of tert-butyl peroxy-2-ethylhexyl carbonate, 0.2 parts of ethoxylated pentaerythritol tetraacrylate, 0.6 parts of tripropenyl isocyanurate, 0.3 parts of γ-methacrylic acid Acyloxypropyltrimethoxysilane, 0.2 parts of bis(2,2,6,6-tetramethylpiperidinyl) sebacate, 0.2 parts of 2-hydroxy-4-n-octyloxybenzophenone , 0.05 parts of triethylene glycol bis[β-(3-tert-butyl-4-hydroxy-5-methylphenyl) propionate] mixed evenly, poured into the first single-screw extruder silo (2) Mix 100 parts of PTW resin, 0.6 parts of tert-butyl peroxy-2-ethylhexyl carbonate, 0.2 parts of ethoxylated pentaerythritol tetraacrylate, 0.6 parts of tripropenyl isocyanurate, 0.3 parts Parts of γ-methacryloxypropyltrimethoxysilane, 0.2 parts of bis(2,2,6,6-tetramethylpiperidinyl) sebacate, 0.2 parts of 2-hydroxy-4-n-octyl Oxybenzophenone, 0.05 pa...

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Abstract

The invention relates to the technical field of photovoltaic module packaging adhesive films, in particular to a multilayer coextruded anti-polarization composite adhesive film. The composite adhesivefilm comprises a POE layer, an anti-polarization layer and an EVA layer arranged from top to bottom sequentially. After adoption of the structure, the composite adhesive film has the benefits as follows: 1, the EVA layer making contact with a battery surface has better compatibility with a polarity aid, and bubble, non-melting and piece combining problems during module lamination can be solved; 2, ethylene segments contained in copolymer resin in the anti-polarization layer have better compatibility with POE and EVA, and higher surface bonding can be formed; besides, acrylate has higher polarization performance, and negative voltage values produced by modules through outer frames can be reduced, so that the anti-PID performance of modules is improved; 3, the POE layer making contact witha back plate and glass has better vapor barrier performance, the light transmittance and volume resistivity of the adhesive film can be increased, thus, electric potential on battery pieces can be increased, the power generation efficiency of the modules can be improved, and the service life of the modules can be prolonged.

Description

technical field [0001] The invention relates to the technical field of packaging adhesive films for photovoltaic modules, in particular to a multilayer co-extrusion anti-polarization composite adhesive film and a preparation method thereof. Background technique [0002] The traditional packaging film for solar photovoltaic modules is mainly ethylene-vinyl acetate copolymer (EVA) film, and the VA (vinyl acetate) content in the film needs to be greater than 25%. Since EVA is a polar resin, it has good compatibility with polar additives, and it is not easy to produce bubbles, unfused and laminated problems during component lamination. However, during the power generation process of the solar photovoltaic module, a negative voltage will be generated through the outer frame, which will cause the sodium ions and potassium ions in the glass to pass through the adhesive film layer to reach the surface of the battery sheet, and accumulate on the surface of the battery sheet to form a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/10C09J4/06C09J11/06H01L31/048
CPCC09J4/06C09J11/06C09J2203/322C09J7/10C09J2301/208H01L31/0481Y02E10/50
Inventor 金旭张刚黄宝玉乔刚童伟吕松
Owner CHANGZHOU SVECK PHOTOVOLTAIC NEW MATERIAL
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