Double-layer co-extrusion anti-polarization type EVA (ethylene vinyl acetate copolymer) composite adhesive film and preparation method thereof

A double-layer co-extrusion, anti-polarization technology, applied in the direction of non-polymer organic compound adhesives, adhesives, adhesive additives, etc., can solve the problem of reducing the power generation efficiency of cells, and improve the anti-PID performance and production efficiency. The effect of high and low production cost

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] (1) Mix 100 parts of EAA resin, 0.8 parts of peroxy-2-ethylhexyl tert-butyl carbonate, 0.9 parts of tripropenyl isocyanurate, 0.5 parts of γ-methacryloxypropyl trimethoxy Silane, 0.2 parts bis(2,2,6,6-tetramethylpiperidinyl) sebacate, 0.2 parts 2-hydroxy-4-methoxy-5-sulfobenzophenone, 0.1 parts 2,6-di-tert-butyl-p-cresol was mixed evenly, and poured into the silo of the first single-screw extruder for use; (2) 100 parts of EVA resin (melt flow rate: 25g / 10min, transparent Light rate>91%, volume resistivity>1.0×10 14 , melting temperature is 56°C, VA content 28%), 0.8 parts of tert-butyl peroxy-2-ethylhexyl carbonate, 0.9 parts of tripropenyl isocyanurate, 0.5 parts of γ-methacryloyloxypropyl Trimethoxysilane, 0.2 parts of bis(2,2,6,6-tetramethylpiperidinyl) sebacate, 0.2 parts of 2-hydroxy-4-methoxy-5-sulfonate Ketone and 0.1 part of 2,6-di-tert-butyl-p-cresol were mixed evenly, poured into the silo of the first single-screw extruder, and set aside; (3) Start two sing...

Embodiment 2

[0058](1) 100 parts of EMA resin, 0.8 parts of tert-butylperoxycarbonate-2-ethylhexyl, 0.6 parts of tripropenyl isocyanurate, 0.3 parts of ethoxylated trimethylolpropane triacrylate , 0.4 parts of vinyl tris(b-methoxyethoxy) silane, 0.2 parts of tris(1,2,2,6,6-pentamethyl-4-piperidinyl) phosphite, 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] were mixed evenly, Pour it into the silo of the first single-screw extruder for use; (2) Mix 100 parts of EVA resin (melt flow rate is 20g / 10min, light transmittance>91%, volume resistivity>1.0×10 14 , melting temperature is 54°C, VA content 25%), 0.8 parts of tert-butyl peroxycarbonate-2-ethylhexyl, 0.6 parts of tripropenyl isocyanurate, 0.3 parts of ethoxylated trimethylol Propane triacrylate, 0.4 part vinyl tris(b-methoxyethoxy) silane, 0.2 part tris(1,2,2,6,6-pentamethyl-4-piperidinyl) phosphite, 0.2 parts of 2-hydroxy-4-n-octyloxybenzophen...

Embodiment 3

[0061] (1) Mix 50 parts of PTW resin, 50 parts of EMA resin, 0.6 parts of tert-butyl peroxy-2-ethylhexyl carbonate, 0.6 parts of tripropenyl isocyanurate, 0.2 parts of pentaerythritol tetraacrylate, 0.3 parts of ethylene Tris(b-methoxyethoxy)silane, 0.1 part of tris(1,2,2,6,6-pentamethyl-4-piperidinyl) phosphite, 0.1 part of 2-hydroxy-4- Mix n-octyloxybenzophenone and 0.1 part of triethylene glycol bis[β-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionate] evenly, pour into the first (2) 100 parts of EVA resin (melt flow rate is 25g / 10min, light transmittance>91%, volume resistivity>1.0×10 14 , melting temperature is 56°C, VA content 28%), 0.6 parts of tert-butyl peroxy-2-ethylhexyl carbonate, 0.6 parts of tripropenyl isocyanurate, 0.2 parts of pentaerythritol tetraacrylate, 0.3 parts of vinyl Tris(b-methoxyethoxy)silane, 0.1 part of tris(1,2,2,6,6-pentamethyl-4-piperidinyl) phosphite, 0.1 part of 2-hydroxy-4-n- Octyloxybenzophenone, 0.1 part of triethylene glycol bis[β-(3-ter...

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Abstract

The invention relates to the technical field of photovoltaic module packaging adhesive films, in particular to a double-layer co-extrusion anti-polarization type EVA (ethylene vinyl acetate copolymer)composite adhesive film. The double-layer co-extrusion anti-polarization type EVA composite adhesive film comprises an anti-polarization layer and an inner EVA layer which are arranged from top to bottom in sequence. With the adoption of the structure, the double-layer co-extrusion anti-polarization type EVA composite adhesive film has beneficial effects as follows: 1, the EVA layer contacted with the battery surface has better compatibility with a polarity aid, and the problems of bubbles, non-melting and cell combination during module laminating can be solved; 2, an ethylene chain segment contained by copolymer resin in the anti-polarization layer has better compatibility with EVA, and stronger surface adhesion can be formed; an acrylate chain segment in the copolymer resin has higher chelating capacity on sodium ions and potassium ions, the number of the sodium ions and potassium ions penetrating the adhesive layer to reach the surface of a solar cell can be reduced, furthermore, acrylate has higher polarized property, a negative voltage value produced by a module passing through an outer border is reduced, and accordingly, anti-PID performance of the module is improved; 3, with the adoption of a double-layer co-extrusion processing method, equipment is simple, production efficiency is high, and production cost is low.

Description

technical field [0001] The invention relates to the technical field of photovoltaic module encapsulating adhesive films, in particular to a double-layer co-extruded anti-polarization EVA 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 fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/10C09J4/02C09J4/06H01L31/048
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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