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Composition and preparation method of solar backsheet

A solar backsheet and composition technology, applied in chemical instruments and methods, synthetic resin layered products, photovoltaic power generation, etc., can solve problems such as poor moisture and heat aging resistance, unguaranteed adhesion, and easy embrittlement, etc., to achieve The preparation method is simple and easy, the effect of excellent interlayer peeling force and low water vapor transmission rate

Active Publication Date: 2015-08-19
SUZHOU DUCHAMPS ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, because there is no single material among polymer materials that meets the requirements of solar backsheets, the backsheets mainly used at home and abroad are multi-layer composite structures, all of which use polyester film (BOPET) as the base film and laminated with fluorine-containing materials. Such as polyvinyl fluoride film (PVF), polyvinylidene fluoride film (PVDF) or coating fluorocarbon resin (FEVE), etc., the price of fluorine material is relatively expensive, the production process is complicated, and the interlayer between the core layer material Poor peel strength, easy to fall off, poor adhesion of the prepared backsheet, low electrical insulation, easy embrittlement, tearing
From the point of view of the material of the backboard, the existing backplanes are generally based on polyester film (BOPET), and some researchers have improved the polyester film. Japanese Patent Application Publication No. 2007-007885, Japan Patent Publication No. 2006-306910 proposes a technical solution for using a polyester film containing 2,6-naphthalene dicarboxylic acid as a solar backsheet material, and a new type of rutile-type oxidation film is disclosed in the Chinese invention patent application CN102365172A. The laminated polyester film of titanium particles, but its adhesion with the adjacent EVA film cannot be guaranteed, and due to the structural characteristics of the material, the main chain of the polyester resin molecule contains a large number of ester groups, which have good adhesion with water. Affinity, it is easy to produce water plasticization, and even a small amount of water will cause the degradation of the main molecular chain, so it is difficult to overcome the defects of high water absorption and poor heat and humidity resistance (brittleness), and it is difficult to achieve the solar backplane. performance requirements

Method used

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  • Composition and preparation method of solar backsheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] A modified polyethylene resin composition, its preparation method is as follows:

[0060] (1) Preparation of grafted polyethylene PE-MA

[0061] 100 parts (parts by mass) of LLDPE7042 (Beijing Yanshan Petrochemical Company), 1 part of maleic anhydride (chemical reagent, analytical grade), and 0.05 parts of DCP initiator (Tianjin Aksu Company) were measured and added to the mixer for mixing and homogenization. After homogenizing for two hours, put it into a twin-screw extruder for melt extrusion and granulation; cool and granulate to obtain granular grafted polyethylene PE-MA, and its melt flow rate at 190°C / 2.16kg is 0.5g / 10min. The diameter of the screw is 75mm, the aspect ratio is 33, the temperature of the screw is controlled at 160-220°C, the rotational speed of the screw is controlled at 100 rpm, and the residence time of the material in the screw is 2-4 minutes.

[0062] The LLDPE7042 (Beijing Yanshan Petrochemical Company) is a linear low-density polyethylene wi...

Embodiment 2

[0066] A kind of solar back plate, its preparation method is as follows:

[0067] (1) Preparation of inner and surface materials: Add 100 parts of polyhexamethylene dodecamide (PA612) into the dryer, dry at 80°C for 4 hours, put it into a high mixer, add 20 parts of rutile titanium dioxide R960, 0.2 parts of antioxidant tetrakis[?-(3',5'-di-tert-butyl-4'-hydroxyphenyl) propionate] pentaerythritol ester, 0.2 parts of UV absorber 2-hydroxy-4-n-octyloxy Benzophenone, 0.1 part of light stabilizer bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate, stirred for 30 minutes at a speed of 600 rpm, and mixed the materials evenly; Then put the above-mentioned materials into the A screw rod of the three-layer co-extruded sheet material unit, the screw rod diameter is 60 mm, and the length-to-diameter ratio is 33.

[0068] (2) Preparation of core layer material: Put the finished product S1 prepared in Example 1 into the B screw of the three-layer co-extrusion sheet unit, the screw diameter i...

Embodiment 3

[0072] A kind of solar back plate, its preparation method is as follows:

[0073] (1) Preparation of inner and surface materials: Add 100 parts of polydecanediamide sebacamide (PA1010) into the dryer, dry at 80°C for 4 hours and put it into a high mixer, add 20 parts of rutile titanium dioxide R960, 0.2 parts Antioxidant tetrakis[?-(3',5'-di-tert-butyl-4'-hydroxyphenyl)propionate]pentaerythritol ester, 0.2 parts of UV absorber 2-hydroxy-4-n-octyloxydiphenyl Methanone, 0.1 part of light stabilizer bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate, stirred for 30 minutes at a speed of 600 rpm, and mixed the materials evenly; then The above-mentioned materials are put into the A screw of the three-layer co-extruded sheet material unit, the diameter of the screw is 60 mm, and the aspect ratio is 33.

[0074] (2) Preparation of core layer material: Put the finished product S1 prepared in Example 1 into the B screw of the three-layer co-extrusion sheet unit, the screw diameter is 90 ...

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Abstract

The invention discloses a backplane for a solar energy assembly and a preparation method thereof. The backplane comprises an inner surface layer, a core layer, and an outer surface layer from the inside to the outside, wherein by mass, the ratio of inner surface layer to the core layer to the outer surface layer is 10-20:20-40:40-60. The inner surface layer is made from a polyamide resin or a vinylite, fillers and additives; the outer surface layer is made from a polyamide resin, fillers and additives; and the core layer is made from a modified polyethylene resin composition. The modified polyethylene resin composition comprises the following components: 100 parts of the polyethylene resin, 5 to 50 parts of a grafted polyethylene, 0 to 2.5 parts of additives, and 0 to 100 parts of fillers. The present invention also discloses a novel modified polyethylene resin composition used for the backplane for a solar energy assembly, the final product obtained has a low water absorption and a low water vapor transmission, so the backplane prepared from the obtained product has interlayer peeling strength superior to other backplanes and excellent electrical insulating properties, thereby fulfilling requirements of backplanes for the shrinkage rate, hot air aging resistance and insulation properties, and can be used for manufacturing solar cell modules.

Description

technical field [0001] The invention relates to a solar cell module polymer back sheet, in particular to a modified polyethylene resin solar back sheet and a preparation method thereof, belonging to the technical field of solar cell module manufacturing. Background technique [0002] Solar energy is the most abundant renewable energy resource, with unique advantages and huge potential for development and utilization. Solar power generation is a new technology in the way of solar energy utilization. The solar photovoltaic system is composed of solar battery packs, solar controllers, batteries, etc. The solar battery module is the core part of the solar power generation system, and the solar backplane is the structural packaging material of the solar battery module, which plays an important role in prolonging the service life of the solar battery. It plays a very important role, it is an indispensable part of solar cell components, and it is also one of the important component...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/08B32B27/18B32B27/32B32B27/30B32B27/34H01L31/049C08L23/06C08L23/08C08L51/06C08F255/02
CPCY02E10/50
Inventor 罗吉江符书臻
Owner SUZHOU DUCHAMPS ADVANCED MATERIALS CO LTD
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