Low-acid white EVA photovoltaic packaging adhesive film and preparation method thereof

An encapsulating film, low-acid technology, applied in the direction of adhesive, film/sheet without carrier, film/sheet adhesive, etc., can solve the problem of reducing the service life of components, aggravating the aging of the film and PID attenuation and corrosion of components Battery grid lines, bus bars, etc., to achieve the effects of inhibiting EVA hydrolysis, excellent hydrolysis resistance, and low acid content

Inactive Publication Date: 2022-07-29
JIANGSU LUSHAN PHOTOVOLTAIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The free acetic acid produced will not only aggravate the aging of the film, promote ion transmission and cause the PID attenuation of the module, but also corrode the battery grid lines, bus bars, etc., greatly reducing the service life of the module

Method used

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  • Low-acid white EVA photovoltaic packaging adhesive film and preparation method thereof
  • Low-acid white EVA photovoltaic packaging adhesive film and preparation method thereof
  • Low-acid white EVA photovoltaic packaging adhesive film and preparation method thereof

Examples

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preparation example Construction

[0045] as attached figure 1 As shown, is the flow chart of the preparation method of the low-acid white EVA photovoltaic encapsulation film of the present invention, and the preparation method of the low-acid white EVA photovoltaic encapsulation film of the present invention includes:

[0046] Step 1: Preparation of complex acid inhibitor:

[0047] Weigh 1 part of amphiphilic polymer, 0.02-0.1 part of basic metal compound, 0.01-0.05 part of carbodiimide compound and 0.02-0.06 part of macromolecular coupling agent by weight, and adopt twin-screw granulation method. To prepare complex acid inhibitor;

[0048] Step 2: Preparation of low-acid white EVA photovoltaic encapsulation film:

[0049] Weigh 100 parts of EVA resin, 5-10 parts of titanium dioxide, 1-5 parts of compound acid inhibitor, 0.5-1.0 part of peroxide cross-linking agent, 0.3-1.0 part of auxiliary cross-linking agent, and 0.2-0.6 part of the anti-oxidant, 0.1-0.5 part of the antioxidant, and 0-0.5 part of the ult...

Embodiment 1

[0051] Preparation of compound acid inhibitor: It is prepared by twin-screw granulation, and the temperature range of each temperature zone is 70-120 °C; among which ethylene-vinyl acetate binary copolymer, magnesium hydroxide, N,N'-diisopropyl Carbodiimide and macromolecular coupling agent are respectively 1:0.05:0.02:0.04 in weight ratio, wherein the content of functional monomer in macromolecular coupling agent is 5%.

[0052] Preparation of low-acid white EVA film A1: in parts by weight, in 100 parts of EVA raw materials with a vinyl acetate content of 28% and a melt index value of 25g / 10min: 7 parts of titanium dioxide, 3 composite acid inhibitors parts, 0.6 parts of tert-butyl peroxide 2-ethylhexyl carbonate, 0.4 parts of triallyl isocyanurate, 0.3 parts of γ-methacryloyloxypropyl trimethoxysilane, tetrakis[beta] 0.1 part of -(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid] pentaerythritol ester, 0.2 part of 4-methoxy-2-hydroxybenzophenone, after mixing for 30min, put ...

Embodiment 2

[0054] Other conditions are the same as in Example 1, and the addition amount of N,N'-diisopropylcarbodiimide is increased by 0.07, that is, ethylene-vinyl acetate copolymer, magnesium hydroxide, N,N'-diisopropylcarbodiimide The base carbodiimide and the macromolecular coupling agent are respectively 1:0.07:0.02:0.04 by weight to prepare the EVA film A2 of Example.

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Abstract

The invention belongs to the technical field of photovoltaic modules, and particularly relates to a low-acid white EVA photovoltaic packaging adhesive film and a preparation method thereof.The low-acid white EVA photovoltaic packaging adhesive film is prepared from 100 parts of EVA resin, 5-10 parts of titanium dioxide, 1-5 parts of a composite acid inhibitor, 0.5-1.0 part of a peroxide cross-linking agent, 0.3-1.0 part of an assistant cross-linking agent, 0.2-0.6 part of a coupling agent, 0.1-0.5 part of an antioxidant and 0-0.5 part of an ultraviolet absorbent, the composite acid inhibitor is prepared by mixing an amphiphilic polymer, an alkaline metal compound, a carbodiimide compound and a macromolecular coupling agent in proportion and granulating. According to the low-acid white EVA photovoltaic packaging adhesive film disclosed by the invention, the composite acid inhibitor is added, so that not only can the power loss of a component caused by water vapor erosion be solved, but also free acetic acid generated in the long-term aging process of EVA can be effectively neutralized, the corrosion of the packaging adhesive film to a battery piece, a bus bar and a metal frame is effectively relieved, and the service life of the component is prolonged.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic modules, and in particular relates to a low-acid white EVA photovoltaic encapsulation film and a preparation method thereof. Background technique [0002] White high-reverse encapsulation film is one of the commonly used packaging materials for photovoltaic modules. Due to its high light utilization efficiency, it has always occupied a high proportion in the field of photovoltaic packaging technology. Compared with POE, EVA resin has better compatibility with white fillers, more uniform dispersion of inorganic fillers, easy pre-crosslinking by irradiation, faster lamination curing rate, and almost no flanging, whitening, etc. It is widely used in the industrial production of white film. However, the EVA resin containing a large amount of vinyl acetate comonomers has a high polarity, which also makes its water vapor transmission rate on the high side, and is easily affected by environmental f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/08C09J11/08C09J11/06C09J11/04C09J7/30C09J7/10
CPCC09J123/0853C09J11/08C09J11/06C09J11/04C09J7/30C09J7/10C08K2003/2224C08K2003/2296C08L2205/025C08L2203/206C09J2423/04C08L23/0853C08L43/04C08K3/22C08K5/29
Inventor 纪文根张好宾陈磊陈玉龙许云峰
Owner JIANGSU LUSHAN PHOTOVOLTAIC TECH
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