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A kind of encapsulation adhesive film for solar cell module

A technology for solar cells and encapsulation films, used in electrical components, circuits, adhesives, etc., can solve problems such as the decrease in the adhesion between EVA and glass interface, the hidden safety hazards of solar cell modules, and the inability to effectively solve the PID phenomenon. Inter-adhesion, improve service life, high adhesion effect

Active Publication Date: 2015-08-12
乐凯胶片股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The packaging material of solar cell modules can provide protection for solar cell modules. However, the widely used packaging material is ethylene-vinyl acetate copolymer (EVA) with a single-layer structure. In a long-term high-temperature and high-humidity environment, EVA is easily hydrolyzed damage, resulting in a significant decrease in the adhesion between EVA and glass interface, resulting in potential safety hazards in solar cell modules
In addition, solar cell modules have been used in a high-voltage environment for a long time, and wet leakage current channels are easily generated between packaging materials, backplanes, glass, and frames. The performance is greatly attenuated, that is, the PID phenomenon
[0003] The Chinese patent with the application number CN201210449988.0 discloses an EVA adhesive film used for solar cell module packaging, but this EVA adhesive film cannot effectively solve the PID phenomenon of solar cell modules in a high-pressure humid heat environment

Method used

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  • A kind of encapsulation adhesive film for solar cell module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1 part by weight of silane grafted LDPE (SX522A: CM401 from AEI Compounds), 65 parts by weight of vinyl POE (EXACT5062 from ExxonMobil, melting peak at 43°C), and 35 parts by weight of ethylene-α-olefin Block copolymer (INFUSE9000 of DOW Chemical Company, melt flow rate measured at 190℃ 2.16kg is 0.5g / 10min) and 1.5 parts by weight of additives are fully mixed to form the material of the polyolefin bonding layer; Parts by weight of vinyl POE (TAFMER DF940 from Mitsui Chemicals, with a melting peak of 77°C), 40 parts by weight of ethylene-α-olefin block copolymer (Infuse 9530 from DOW Chemicals, measured at 190°C at 2.16 kg The melt flow rate is 5g / 10min) and 1.5 parts by weight of additives are fully mixed to form the material of the polyolefin barrier layer; according to the thickness of the polyolefin adhesive layer of 10μm and the thickness of the polyolefin barrier layer of 180μm, the two layers are mixed. Two extruders are used to co-extrude a flat die and cool and ...

Embodiment 2

[0042] 30 parts by weight of silane grafted MDPE (SX720: CM488 from AEI Compounds), 95 parts by weight of vinyl POE (ENGAGE8401 from DOW Chemicals, melting peak at 80°C), and 5 parts by weight of ethylene-α-olefin block Copolymer (INFUSE9530 of DOW Chemical Company, melt flow rate measured at 190℃2.16kg is 5g / 10min) and 1.5 parts by weight of additives are fully mixed to form the material of the polyolefin bonding layer; 90 parts by weight Vinyl POE (EXACT5062 of ExxonMobil, melting peak at 43°C), 10 parts by weight of ethylene-α-olefin block copolymer (INFUSE9000 of DOW Chemical Company, melt flow measured at 190°C 2.16kg The speed is 0.5g / 10min) and 1.5 parts by weight of the additives are fully mixed to form the material of the polyolefin barrier layer; according to the thickness of the polyolefin adhesive layer of 50μm and the thickness of the polyolefin barrier layer of 400μm, use two materials after mixing the two layers. A flat die was co-extruded by an extruder and cool...

Embodiment 3

[0044] 5 parts by weight of silane grafted LLDPE (LINKLON XLE815N from Mitsubishi Chemical Corporation), 75 parts by weight of vinyl POE (DF710 from Mitsui Chemicals, melting peak at 59°C), 25 parts by weight of ethylene-α-olefin block copolymer (Infuse 9100 of DOW Chemical Company, the melt flow rate measured at 190℃ 2.16kg is 1g / 10min) and 1.5 parts by weight of additives are thoroughly mixed to form the material of the polyolefin bonding layer; 60 parts by weight of ethylene Base POE (EXACT5062 of ExxonMobil, melting peak at 43°C), 40 parts by weight of ethylene-α-olefin block copolymer (INFUSE9000 of DOW Chemical Company, melt flow rate measured at 190°C 2.16kg 0.5g / 10min) and 1.5 parts by weight of additives are fully mixed to form the material of the polyolefin barrier layer; according to the thickness of the polyolefin adhesive layer of 10μm and the thickness of the polyolefin barrier layer of 400μm, use two sets of materials after the two layers are mixed The extruder c...

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Abstract

The invention discloses a packaging adhesive film for a solar cell module. The packaging adhesive film for the solar cell module comprises a blocking layer, a first adhesive layer and a second adhesive layer, wherein the first adhesive layer and the second adhesive layer are located at the two sides of the blocking layer, the blocking layer is a polyolefin blocking layer containing ethylene-a-olefin polymer. The adhesive film is good in blocking performance and capable of effectively avoiding the PID phenomenon of the solar cell module under the high-pressure, damp and hot environment, the adhering performance between the packaging adhesive film and a glass substrate and between the packaging adhesive film and a cell sheet is good, and the service life of the solar cell module is prolonged.

Description

Technical field [0001] The invention belongs to the field of photovoltaic new energy materials, and relates to an encapsulation film for solar cell components. Background technique [0002] The packaging material of solar cell modules can provide protection for solar cell modules. However, the currently widely used packaging material is a single-layer structure of ethylene-vinyl acetate copolymer (EVA). EVA is easily hydrolyzed under long-term high temperature and high humidity environments. Damage, resulting in a significant decrease in the adhesion of EVA and glass interface, resulting in potential safety hazards for solar cell modules. In addition, solar cell modules have been used in high-voltage environments for a long time. Wet leakage current channels are likely to occur between the packaging materials, backplane, glass and frame. A large amount of charge accumulates on the cell surface, which deteriorates the passivation effect of the cell surface and leads to the deterio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/02C09J123/08H01L31/048
CPCY02E10/50
Inventor 范云峰徐晓龙郑凯王莉
Owner 乐凯胶片股份有限公司
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