High-barrier-property photovoltaic backboard of multilayer structure

A photovoltaic backplane and multi-layer structure technology, applied in photovoltaic power generation, coating, layered products, etc., can solve the problems of yellowing, backplane barrier adhesion and insufficient thermal conductivity, etc., to achieve good adhesion , Reduce the production process and reduce the cost

Active Publication Date: 2016-03-23
ZHONGTIAN PHOTOVOLTAIC MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional photovoltaic backsheets such as TPT and KPK are general-purpose backsheets. The middle base layer is polyester film, and the inner and outer layers are fluoropolymer films (PVF film, PVDF film, etc.), which have excellent insulation properties and weather resistance. (UV resistance, heat and humidity resista

Method used

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  • High-barrier-property photovoltaic backboard of multilayer structure

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Embodiment 1

[0029] The present invention discloses a high-barrier multi-layer structure photovoltaic backsheet. The photovoltaic backsheet is composed of a weather-resistant outer layer, a first barrier coating, a first base layer, a second barrier coating, and a second barrier coating from top to bottom. Base layer, third barrier coat and inner layer.

[0030] Among them, the weather-resistant layer adopts a polyvinyl fluoride film with a thickness of 20um; the first barrier coating, the second barrier coating and the third barrier coating adopt a two-component polyurethane system with a thickness of 5um, and the A component is composed of 15 parts of fluororesin , 20 parts of polypropylene oxide polyol, 1 part of defoamer, 0.5 part of catalyst, 5 parts of inorganic filler, 20 parts of organic solvent, component B is trimethyl 1,6-hexamethylene diisocyanate curing agent , and NCO / OH=0.5 in components A and B; the first base layer and the second base layer use a weather-resistant PET film...

Embodiment 2

[0032] The present invention discloses a high-barrier multi-layer structure photovoltaic backsheet. The photovoltaic backsheet is composed of a weather-resistant outer layer, a first barrier coating, a first base layer, a second barrier coating, and a second barrier coating from top to bottom. Base layer, third barrier coat and inner layer.

[0033] Among them, the weather-resistant layer adopts a polyvinylidene fluoride film with a thickness of 22.5um; the first barrier coating, the second barrier coating and the third barrier coating adopt a two-component polyurethane system with a thickness of 18um, and the A component consists of 20 parts Fluorine resin, 30 parts of polypropylene oxide polyol, 1.5 parts of defoamer, 0.8 parts of catalyst, 8 parts of inorganic filler, 10 parts of organic solvent, component B is isophorone diisocyanate curing agent, and component A and NCO / OH=0.8 in component B; the first base layer and the second base layer use a weather-resistant PET film ...

Embodiment 3

[0035] The present invention discloses a high-barrier multi-layer structure photovoltaic backsheet. The photovoltaic backsheet is composed of a weather-resistant outer layer, a first barrier coating, a first base layer, a second barrier coating, and a second barrier coating from top to bottom. Base layer, third barrier coat and inner layer.

[0036] Among them, the weather-resistant layer adopts a polyvinylidene fluoride film with a thickness of 40um; the first barrier coating, the second barrier coating and the third barrier coating adopt a two-component polyurethane system with a thickness of 20um, and the A component is composed of 25 parts of fluorine Resin, 40 parts of polypropylene oxide polyol, 2 parts of defoamer, 1 part of catalyst, 10 parts of inorganic filler, 30 parts of organic solvent, B component is toluene diisocyanate curing agent, and A component and B component Medium NCO / OH=1.1; the first base layer and the second base layer use a weather-resistant PET film...

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Abstract

The invention discloses a high-barrier-property photovoltaic backboard of a multilayer structure. The photovoltaic backboard sequentially comprises a weather-proof outer layer, a first obstruction coating, a first base layer, a second obstruction coating, a second base layer, a third obstruction coating and an inner layer from top to bottom. The first obstruction coating, the second obstruction coating and the third obstruction coating are all double-component polyurethane systems. A component A is prepared from 15-25 parts of fluorine resin, 20-40 parts of polypropylene oxide polyhydric alcohols, 1-2 parts of defoaming agent, 0.5-1 part of catalyst, 5-10 parts of inorganic filler and 10-30 parts of organic solvent. A component B is a mixture containing one or two of toluene diisocynate, isophorone diisocyanate and trimethyl 1,6-hexamethylene diisocyanate. The component A and the component B are mixed according to the ratio NCO/OH=0.5-1.1. According to the high-barrier-property photovoltaic backboard, by designing the two base layers and the three obstruction coatings, the moisture barrier property and the insulativity of the backboard are effectively improved.

Description

technical field [0001] The invention relates to a backboard of a photovoltaic module, in particular to a photovoltaic backplane with a high barrier property multilayer structure. Background technique [0002] Photovoltaic backsheet is an extremely important packaging material in photovoltaic modules, which plays a supporting role for the cells. At the same time, it directly contacts with the external environment in a large area, and undertakes the important mission of ensuring the stable power generation of photovoltaic modules for 25 years. Excellent insulation, barrier Durability and weather resistance are the reliability guarantees for its long-term application. [0003] Traditional photovoltaic backsheets such as TPT and KPK are general-purpose backsheets. The middle base layer is polyester film, and the inner and outer layers are fluoropolymer films (PVF film, PVDF film, etc.), which have excellent insulation properties and weather resistance. (UV resistance, heat and ...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D127/12C09D133/00C08G18/48H01L31/049B32B27/36B32B27/32B32B27/34B32B27/30
CPCY02E10/50C09D175/08B32B27/304B32B27/32B32B27/34B32B27/36C08G18/48C08L2201/14C08L2205/03
Inventor 杨继明王同心沙锐张宪哲王强蒋贤明
Owner ZHONGTIAN PHOTOVOLTAIC MATERIALS
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