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Solar-powered back plate and manufacturing method thereof

A technology of solar backsheet and polyethylene resin, which is applied in the direction of final product manufacturing, sustainable manufacturing/processing, photovoltaic power generation, etc., can solve the problems of poor interlayer peeling strength, low temperature resistance level, and low mechanical strength, and achieve enhanced The effect of interlayer peeling force, improved temperature resistance level, and excellent mechanical properties

Active Publication Date: 2013-04-17
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 can meet the requirements of solar backsheets, the main backsheets used at home and abroad are all multi-layer composite structures, all of which use polyester film (BOPET) as the base film and laminated with fluorine-containing solar panels. Materials such as polyvinyl fluoride film (PVF), polyvinylidene fluoride film (PVDF) or coated fluorocarbon resin (FEVE), etc., fluorine materials are more expensive, low mechanical strength, complex production process, and core The interlayer peel strength of the layer material is poor, easy to fall off, and the prepared backsheet has poor adhesion, low electrical insulation, easy embrittlement, and tearing
From the point of view of the material of the backboard, the existing backplane is generally based on polyester film (BOPET), and its adhesion with the adjacent EVA film cannot be guaranteed, and due to the structural characteristics of the material, polyester The main chain of the resin molecule contains a large number of ester groups, which has a good affinity with water and is prone to water plasticization. At the same time, even a small amount of water will cause the degradation of the main chain of the molecule, so it is difficult to overcome the high water absorption rate and resistance to heat and humidity. Defects of poor aging performance (brittleness), it is difficult to meet the performance requirements of solar backsheets
[0004] Polyethylene resin is a polymer of ethylene, which has high wear resistance, excellent electrical insulation, stress crack resistance and low creep, low water vapor transmission rate and excellent dielectric properties, and due to the ethylene There is no polar functional group at the end of the molecular chain, so the water absorption rate is extremely low, which can meet the aging resistance and weather resistance performance requirements of the solar battery backplane, but its temperature resistance level is low and the mechanical properties are poor, so it cannot be directly used as a solar backplane substrate s material

Method used

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  • Solar-powered back plate and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A kind of solar back plate, its preparation method is as follows:

[0047] (1) Preparation of cross-linked polyethylene resin XPE

[0048]Add 100 parts (by mass) of metallocene polyethylene 1327ED (Exxon Chemical Company, USA), 2 parts of vinyltrimethoxysilane A151 (Dow Corning Company, USA), and 0.2 parts of DCP initiator (Tianjin Aksu Company) respectively Mix and homogenize in the mixer, put into the twin-screw extruder after homogenizing for two hours for melt extrusion (the twin-screw adopts exhaust screw, the diameter of the screw is 75 mm, the aspect ratio is 33, and the temperature of the screw is controlled at 160~220 ℃, the screw speed is controlled at 100 r / min, and the residence time of the material in the screw is 2 to 4 minutes); cooling and pelletizing to obtain cross-linked polyethylene XPE, the melt flow rate of which is 0.2 g at 190 °C / 2.16 kg / 10min.

[0049] The metallocene polyethylene 1327ED has a density of 0.927g / cm 3 , DSC melting point 122°C...

Embodiment 2

[0058] A kind of solar back plate, its preparation method is as follows:

[0059] (1) Preparation of cross-linked polyethylene resin XPE

[0060] Add 100 parts (by mass) of metallocene polyethylene 1327ED (Exxon Chemical Company, USA), 2 parts of vinyltrimethoxysilane A151 (Dow Corning Company, USA), and 0.16 parts of DCP initiator (Tianjin Aksu Company) respectively Mix and homogenize in the mixer, put into the twin-screw extruder after homogenizing for two hours for melt extrusion (the twin-screw adopts exhaust screw, the diameter of the screw is 75 mm, the aspect ratio is 33, and the temperature of the screw is controlled at 160~220 ℃, the screw speed is controlled at 100 r / min, and the residence time of the material in the screw is 2 to 4 minutes); cooling and pelletizing to obtain cross-linked polyethylene XPE, the melt flow rate of which is 0.2 g at 190 °C / 2.16 kg / 10min.

[0061] (2) Preparation of grafted polyethylene PE-MA

[0062] 100 parts (parts by mass) of LLD...

Embodiment 3

[0068] A kind of solar back plate, its preparation method is as follows:

[0069] (1) Preparation of cross-linked polyethylene resin XPE

[0070] Add 100 parts (by mass) of metallocene polyethylene 1327ED (Exxon Chemical Company, USA), 2 parts of vinyltrimethoxysilane A151 (Dow Corning Company, USA), and 0.2 parts of DCP initiator (Tianjin Aksu Company) respectively Mix and homogenize in the mixer, put into the twin-screw extruder after homogenizing for two hours for melt extrusion (the twin-screw adopts exhaust screw, the diameter of the screw is 75 mm, the aspect ratio is 33, and the temperature of the screw is controlled at 160~220 ℃, the screw speed is controlled at 100 r / min, and the residence time of the material in the screw is 2 to 4 minutes); cooling and pelletizing to obtain cross-linked polyethylene XPE, the melt flow rate of which is 0.2 g at 190 °C / 2.16 kg / 10min.

[0071] (2) Preparation of grafted polyethylene PE-MA

[0072] 100 parts (parts by mass) of LLD...

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Abstract

The invention discloses a solar-powered back plate. The solar-powered back plate comprises an inner surface layer, a core layer and an outer surface layer in the mass ratio of (10-20):(20-40):(40-60) from inside to outside, wherein the inner surface layer is made from vinyl resin, a filler and an additive; the outer surface layer is made from polyamide resin, a filler and an additive; and the core layer is made from a modified polyethylene resin composition. The invention further develops a novel polyethylene resin composition, which comprises 100 parts of crosslinked polyethylene resin, 0-50 parts of grafted polyethylene, 0.1-0.5 parts of catalyst, 0-100 parts of filler and 0-2.5 parts of additive. The novel solar-powered back plate developed by the invention is prepared through a coextrusion process; and a prepared final product has the advantages of superior adhesion, high interlaminar peeling strength, aging resistance, particular damp-heat aging resistance, low saturated water absorptivity, low water vapor transmittance and superior electric insulating property, simple preparation process, low cost and suitability for industrial production.

Description

technical field [0001] The invention relates to a solar backboard and a preparation method thereof, in particular to a solar backboard using a modified polyethylene resin composition as a base film and a preparation method thereof, and belongs 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 component...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/048H01L31/18H01L31/049
CPCY02E10/50Y02P70/50
Inventor 罗吉江符书臻
Owner SUZHOU DUCHAMPS ADVANCED MATERIALS CO LTD
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