CN108611025A - A kind of super fast curing solar energy packaging adhesive film and preparation method thereof - Google Patents

Abstract

The invention relates to a solar energy encapsulation adhesive film, in particular to an ultra-fast curing solar energy encapsulation adhesive film and a preparation method thereof, which are used for photovoltaic single-glass and double-glass components, and belong to the field of photovoltaic encapsulation adhesive films. Design a solar encapsulation adhesive film that reduces the lamination time. The purpose is to adjust the process, change the additives, and increase the lamination temperature to reduce the vacuuming and lamination time of the photovoltaic module during the encapsulation process, improve the efficiency, and reduce the costs.

Description

A kind of ultra-fast curing solar energy encapsulation adhesive film and preparation method thereof

technical field

The invention relates to a solar energy encapsulation adhesive film, in particular to an ultra-fast curing solar energy encapsulation adhesive film and a preparation method thereof, which are used for photovoltaic single-glass and double-glass components, and belong to the field of photovoltaic encapsulation adhesive films.

Background technique

With the depletion of energy and the deterioration of the environment, the governments of various countries have higher and higher requirements for energy conservation and emission reduction. People urgently need a new energy source to replace fossil fuels. Solar energy is a green, non-polluting and inexhaustible energy source. The solar energy industry has also become the focus of the development of various countries. Solar energy is converted into electrical energy through solar panels. Since the main working environment of the solar panels is outdoors, and the solar panels cannot be exposed to the sun and rain, packaging materials must be used to seal them. In order to match the absorption and conversion of ultraviolet light by the battery sheet and the aging resistance requirements of the back sheet, the battery packaging film is divided into upper and lower layers of the battery sheet, and plays a packaging role in the solar cell module.

The working principle of photovoltaic modules is that sunlight passes through the glass, then through the polymer encapsulation layer, and reaches the silicon wafer. The light energy is converted into electrical energy, and then led out by the junction box. Usually, as an inorganic material, a silicon wafer can have a lifespan of more than 40 years. As a crystalline silicon battery, it is prone to power attenuation or even failure due to oxidation. The working life of the solar encapsulation film is much shorter than that of the battery sheet, and it is the protective layer of the battery material other than the silicon sheet. In the harsh outdoor weather environment, if the quality of the polymer encapsulation film is not good, it will quickly age and turn yellow, or even degummed and cracked, causing the battery components to rupture or be eroded by the environment, resulting in a decrease in the photoelectric conversion efficiency of the entire battery component or Failure due to short circuit damage. Therefore, the performance of encapsulation materials is very important to the long-term performance of battery components.

In the packaging process of solar cell modules, to improve the efficiency of solar photoelectric conversion and reduce its cost, for example, PERC, shingling technology, high reflection, high transmittance, packaging white film, thermal conductive adhesive film And backplane packaging materials, etc., whether from silicon chip technology, current collection technology, or auxiliary material gain technology, technical personnel in the industry are constantly conducting innovative research on improving quality and efficiency.

Cells, packaging film and photovoltaic glass need to use a laminator for physical cross-linking, so that the packaging materials, cells and photovoltaic materials are closely bonded and laminated. Now the lamination time of photovoltaic modules of general manufacturers is 12 to 18 minutes , Lamination temperature at 140 ~ 150 ℃.

Contents of the invention

The present invention mainly solves the deficiencies in the prior art, and provides an ultra-fast curing solar energy encapsulating adhesive film and its preparation without changing the performance of the components, reducing the lamination time, improving the production efficiency, and effectively reducing the cost method.

Above-mentioned technical problem of the present invention is mainly solved by following technical scheme:

An ultra-fast curing solar energy encapsulation adhesive film and a preparation method thereof, the steps are as follows: 80 to 100 parts by mass of encapsulation film resin, 0.3 to 3 parts by mass of a crosslinking agent, 0.2 to 3 parts by mass of an auxiliary crosslinking agent, 0.1 ~5 parts by mass of the coupling agent and 0.1~2 parts by mass of the ultraviolet absorber are uniformly mixed, and then extruded by a single-screw extruder, and the extruded product is cast to form a film.

Preferably, the encapsulation film resin is made of polyethylene, polypropylene, polybutene, ethylene-vinyl acetate copolymer, metallocene ethylene octene copolymer, polyvinyl butyral, polyurethane elastomer, polyvinyl chloride , ethylene butene high polymer, propylene ethylene random copolymer, or two or more are mixed in any proportion.

As preferably, the cross-linking agent is a free radical thermally initiated cross-linking agent composed of tert-butyl-2-ethylhexacarbonate, N-succinic acid S-acetylmercaptoethylene glycol ester, peroxide (2-ethyl tert-amyl carbonate, tert-butyl peroxy-2-ethylhexanoate, tert-butyl peroxy-2-ethylhexyl carbonate, 2,5-dimethyl-2,5-di-tert-butyl One or more than two kinds of hexane peroxide are mixed in any proportion.

As a preference, the auxiliary crosslinking agent is mixed in any proportion by one or two or more of tripropenyl isocyanurate, benzoyl peroxide, divinylpropylamine, and hexahydrophthalic anhydride. composition.

As preferably, the ultraviolet absorber consists of 2-(2H-benzotriazol-2-yl) p-cresol, 2-(2H-benzotriazol-2-yl)-4,6-bis(1 -Methyl-1-phenylethyl)phenol﹑2-(3,5-di-tert-butyl-2-hydroxyphenyl)benzotriazole﹑2-(2-hydroxy-3-tert-butyl-5 -methylphenyl)-5-chlorobenzotriazole﹑2-[2-hydroxy-5-tert-octylphenyl)benzotriazole﹑[2-hydroxy-4-(octyloxy)phenyl]benzene One or two or more of the base ketones are mixed in any proportion.

As preferably, the coupling agent is a silane coupling agent consisting of 3-(trimethoxysilyl)propyl-2-methyl-2-acrylate, anilinomethyltriethoxysilane, vinyl tri( One or more of 2-methoxyethoxy)silane, octyltrimethoxysilane, (trimethoxysilyl)ethylene, 1,4-bis-tert-butylperoxycumene It can be mixed in any proportion.

Preferably, the thickness is 0.45-0.8 mm, and the grammage is 350-650 g/㎡.

Preferably, the lamination temperature of the photovoltaic module is 155-165° C., and the lamination time is 8-10 minutes, and the adhesive film can be cross-linked.

The invention provides an ultra-fast curing solar energy encapsulating adhesive film and a preparation method thereof. The preparation process of the ultra-fast curing solar encapsulating adhesive film of the present invention is practical and effective, and the lamination time of the adhesive film is reduced to 8-10 hours compared with the traditional encapsulating adhesive film. Minutes, and the general performance and aging performance of the adhesive film meet the ASTM standard and IEC standard. The appearance of the adhesive film after lamination is good, without wrinkles and glue overflow.

Detailed ways

The technical solutions of the present invention will be further specifically described below through examples.

Example 1: In terms of parts by mass, 0.6 parts of crosslinking agent peroxy-2-ethylhexyl tert-butyl carbonate, 0.7 parts of co-crosslinking agent tripropenyl isocyanurate, 0.4 parts of ultraviolet light absorber 2-(2H-benzotriazol-2-yl) p-cresol, 0.5 parts of coupling agent 3-(trimethoxysilyl)propyl-2-methyl-2-acrylate, uniformly mixed and extruded by a single-screw extruder, the extruded product is cast into a film, cooled and wound to obtain a width of 990mm , a film with a thickness of 0.5mm, denoted as A.

Embodiment 2: in parts by mass, to 100 parts of metallocene ethylene octene copolymer, add 0.65 parts of crosslinking agent peroxy (2-ethylhexyl) tert-amyl carbonate, 0.6 parts of auxiliary crosslinking agent peroxide 3,3,5-tert-butyl trimethylhexanoate﹑0.45 parts of UV absorber 2-(2H-benzotriazol-2-yl)-4,6-bis(1-methyl-1-benzene ethyl ethyl) phenol, 0.6 parts of coupling agent anilinomethyltriethoxysilane, mixed uniformly and extruded by a single-screw extruder, the extruded product is cast into a film, cooled and wound to obtain a width of 990mm, with a thickness of 0.5mm film, denoted as B.

Example 3: In terms of parts by mass, to 100 parts of ethylene-vinyl acetate copolymer (the mass content of vinyl acetate VA is 26-30%), add 0.45 parts of crosslinking agent peroxide-2-ethylhexyl tert-butyl acid ester, 0.5 parts of co-crosslinking agent benzoyl peroxide, 0.5 parts of UV absorber 2-(3,5-di-tert-butyl-2-hydroxyphenyl) benzotriazole, 0.4 parts of coupling Vinyl tris (2-methoxyethoxy) silane, mixed evenly and extruded by a single-screw extruder, the extruded product was cast into a film, cooled and wound to obtain a glue with a width of 990mm and a thickness of 0.5mm film, denoted as C.

The film sample made by the above ratio is determined to be 100*100mm in size, and the PTFE cloth with a size of 200*200mm is selected, and put into the single-chamber vacuum laminator in the order of PTFE/film/PTFE Inside, at a temperature of 155-165°C, the lamination is cured for 8-10 minutes, and the laminated film is taken out for testing to test its cross-linking degree, PID resistance performance and aging performance. The cross-linking degree test standard refers to ASTM D2765, The aging performance test standard refers to ASTM G154 and IEC61215, and the anti-PID performance test refers to the standard IEC62804. 3 embodiment test results are as follows:

By way of example, the adhesive film of the present invention fully meets the standard requirements of photovoltaic modules after increasing the temperature and reducing the lamination time.

The film sample made in the above example is determined to be 1642*984mm in size, and ten pieces of polysilicon cells with a size of 156*156mm are selected and welded into one group by welding strips. At the same time, choose a photovoltaic glass with a size of 1642*984*3.2mm and a photovoltaic backplane of KP09100 grade, and double-glass modules in the order of glass/film/cell/film/glass (single-glass modules are in the order of glass/film/cell/ Adhesive film/back sheet sequence) into the TCZY-G7-9 double-chamber laminator, the temperature is set at 155-165 ℃, the vacuuming and lamination time is set at 8-10 minutes, after the lamination is completed, put The components are tested with MI3180 power analog tester. The test results of each example sample are as follows:

film sample Component power (W) A 282 B 276 C 272

It can be seen from the above data that after reducing the lamination time of the photovoltaic module made of the adhesive film of the present invention to 8-10 minutes, the power of the module can meet the requirements of the industry standard. Finally, the above is only a description of the patent of the present invention but not a limitation of the technical solutions described in the patent of the present invention. All technologies and improvements that do not depart from the spirit and scope of the present invention shall be covered by the claims of the present invention.

Claims (8)

1. a kind of super fast curing solar energy packaging adhesive film and preparation method thereof, it is characterised in that carry out according to the following steps：By 80 ~100 mass parts packaging adhesive film resins, 0.3~3 mass parts crosslinking agent, 0.2~3 mass parts assistant crosslinking agent, 0.1~5 mass parts Agent coupling agent, 0.1~2 mass parts ultraviolet absorber are uniformly mixed, and are then squeezed out with single screw extrusion machine, and extrudate is through stream Prolong film forming.

2. a kind of super fast curing solar energy packaging adhesive film according to claim 1 and preparation method thereof, it is characterised in that： The packaging adhesive film resin is total to by polyethylene, polypropylene, polybutene, ethylene-vinyl acetate copolymer, metallocene ethylene octene In polymers, polyvinyl butyral, polyurethane elastomer, polyvinyl chloride, ethylene butene high polymer, propylene-ethylene random copolymer One or more by arbitrary proportioning mixing form.

3. a kind of super fast curing solar energy packaging adhesive film according to claim 1 and preparation method thereof, it is characterised in that： The crosslinking agent is free radical thermal initiation crosslinking agent by tertiary butyl -2- ethyl hexyls carbonic ester, N- succinic acid S- acetyl group sulfydryl second Diol ester, peroxidating (2- ethylhexyls) carbonic acid tert-pentyl ester, the tertiary Ding Zhi ﹑ peroxides -2- ethylhexyl carbon of peroxidating -2 ethyl hexanoic acid One or more of tert-butyl acrylate, 2,5- dimethyl -2,5- di-t-butyl hexane peroxides press arbitrary proportioning mixing group At.

4. a kind of super fast curing solar energy packaging adhesive film according to claim 1 and preparation method thereof, it is characterised in that： The assistant crosslinking agent is by three acrylic isocyanuric acid esters, benzoyl peroxide, divinyl propylamine, hexahydrophthalic anhydride One or more by arbitrary proportioning mixing form.

5. a kind of super fast curing solar energy packaging adhesive film according to claim 1 and preparation method thereof, it is characterised in that： The ultraviolet absorber is by 2- (2H- benzotriazole -2- bases) to two (1- of Jia Ben Fen ﹑ 2- (2H- benzotriazole -2- bases) -4,6- Methyl-1-phenylethyl) Ben Fen ﹑ 2- (3,5- di-t-butyl-2- hydroxy phenyls) Ben and San Zuo ﹑ 2- (2- hydroxyl-3- tertiary butyls- 5- aminomethyl phenyls) and -5- chlorine benzotriazole ﹑ 2- [the tertiary pungent phenyl of 2- hydroxyls -5-) benzene and three azoles ﹑ [2- hydroxyls -4- (octyloxy) benzene Base] one or more of phenyl ketone forms by the mixing of arbitrary proportioning.

6. a kind of super fast curing solar energy packaging adhesive film according to claim 1 and preparation method thereof, it is characterised in that： The coupling agent is silane coupling agent by 3- (trimethoxysilyl) propyl -2- methyl -2- Bing olefin(e) acid Zhi ﹑ anilinomethyls three Ethoxy base silane ﹑ vinyl three (2- methoxy ethoxies) silicon alkane ﹑ octyls three methoxy silane ﹑ (trimethoxy silane base) second One or more of Xi ﹑ 1,4 bis tert butyl peroxy isopropyl benzenes are by arbitrary proportioning mixing composition.

7. a kind of super fast curing solar energy packaging adhesive film according to claim 1 and preparation method thereof, it is characterised in that： Its thickness is 0.45~0.8mm, and grammes per square metre is 350~650g/ ㎡.

8. a kind of super fast curing solar energy packaging adhesive film according to claim 1 and preparation method thereof, it is characterised in that： 155~165 DEG C of photovoltaic module laminating temperature, 8~10 minutes glued membranes of lamination times, that is, cross-linking completion.