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Anti-PID photovoltaic EVA encapsulation adhesive film and preparation method thereof

A film and antioxidant technology, applied in the direction of adhesive, film/sheet without carrier, film/sheet adhesive, etc., can solve the failure of anti-PID effect, decrease of material polarity, increase the volume of EVA film Resistivity and other issues, to achieve good reliability and stability, ensure reliability and stability, and good anti-PID performance.

Active Publication Date: 2020-11-10
CSI SOLAR POWER GROUP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Reducing the VA content can certainly alleviate the PID attenuation, but it will reduce the polarity of the material, deteriorate the peel strength, and reduce the degree of crosslinking, thereby increasing the risk of using the EVA film.
[0006] CN103756578A discloses a fluorine compound modified EVA packaging film, which has good hydrolysis resistance and insulation, and achieves the purpose of anti-PID. However, by increasing its insulation, the volume resistivity of the EVA film is increased, although PID can be well controlled in the short term, but in the long run there is a hidden danger of failure
Because the EVA film will age and degrade during use, the volume resistivity will decrease with time, resulting in the failure of the anti-PID effect

Method used

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  • Anti-PID photovoltaic EVA encapsulation adhesive film and preparation method thereof
  • Anti-PID photovoltaic EVA encapsulation adhesive film and preparation method thereof
  • Anti-PID photovoltaic EVA encapsulation adhesive film and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0038] In the present embodiment, the preparation raw material of EVA adhesive film comprises EVA resin and by the mass of EVA resin, the component of percentage content is as follows:

[0039]

[0040] EVA resin, tert-butyl peroxide 2-ethylhexanoate, triallyl isocyanurate, bis-2,2,6,6-tetramethylpiperidinol sebacate, isopentyl Propyl xanthate, γ-(methacryloyloxy)propyltrimethoxysilane and tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester mixed, extruded Go out, calender into adhesive film, obtain described EVA adhesive film.

Embodiment 2

[0042] In the present embodiment, EVA film comprises EVA resin and by the mass of EVA resin, the component of percentage content is as follows:

[0043]

[0044] EVA resin, 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, trimethylolpropane trimethacrylate, bis-2,2,6 sebacate, 6-tetramethylpiperidinol ester, zinc dibutyldithiocarbamate, γ-(methacryloyloxy)propyltrimethoxysilane and tetrakis[β-(3,5-di-tert-butyl- 4-Hydroxyphenyl)propionic acid]pentaerythritol esters were mixed, extruded by an extruder at a barrel temperature of 80°C, and calendered to form an adhesive film to obtain the EVA adhesive film.

Embodiment 3

[0046] In the present embodiment, EVA film comprises EVA resin and by the mass of EVA resin, the component of percentage content is as follows:

[0047]

[0048]

[0049] EVA resin, tert-butyl peroxide 2-ethylhexanoate, trimethylolpropane trimethacrylate, bis-2,2,6,6-tetramethylpiperidinol sebacate, isoamyl propylene xanthate, γ-(methacryloyloxy)propyltrimethoxysilane and tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]pentaerythritol ester, Using an extruder to extrude at a barrel temperature of 70° C., and calendering to form an adhesive film to obtain the EVA adhesive film.

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Abstract

The invention provides an anti-PID photovoltaic EVA packaging film and a preparation method thereof. The EVA packaging film is prepared from EVA resin and the following raw materials: based on the mass of the EVA resin, 0.5 to 0.8% of a main cross-linking agent, 0.4 to 0.6% of an auxiliary cross-linking agent, 0.2 to 0.5% of a light stabilizing agent, 0.3 to 1.2% of an ion capturing agent, 0.1 to0.5% of a coupling agent and 0.1 to 0.5% of an anti-oxidant. The EVA packaging film prepared in the invention has volume resistivity of no less than 1016 omega.cm and shrinkage of no more than 0.5%; after testing under the conditions of a temperature of 85 DEG C and relative humidity of 85% for 2000 h, the EVA packaging film has a damp-heat aging yellowing value of no more than 2.5 and an ultraviolet aging yellowing value of no more than 2.5; and the EVA packaging film has good PID resistance, reliability and stability.

Description

technical field [0001] The invention belongs to the field of photovoltaic materials, and relates to an EVA adhesive film and a preparation method thereof, in particular to an anti-PID photovoltaic EVA packaging adhesive film and a preparation method thereof. Background technique [0002] Since 2013, with the domestic and foreign photovoltaic power plants invested in the early stage being connected to the grid for power generation and running for a period of time, the quality problems of domestic and foreign power plants have appeared on a large scale. Quality problems such as snail pattern and potential induced degradation (Potential Induced Degradation, PID) broke out in many power stations. Due to the use of inferior EVA (Ethylene Vinyl Acetate, ethylene-vinyl acetate copolymer) film in some domestic power stations, the attenuation of up to 60% was found in the power station after about one year of operation. [0003] The formation mechanism of PID is closely related to t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/10C09J7/30C09J123/08C09J11/06
CPCC08K5/00C08K5/14C08K5/38C08K5/39C08K5/5425C09J7/00C09J11/06C09J123/0853
Inventor 刘屹陈荣张圣博
Owner CSI SOLAR POWER GROUP CO LTD
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