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A solar cell backsheet film with high composite fastness

A technology for solar cells and backsheet films, applied in circuits, photovoltaic power generation, household appliances, etc., can solve the problems of large water vapor transmission, corrosion, poor weather resistance, etc., to reduce the probability of delamination, improve the barrier to water vapor, The effect of improving compound fastness

Active Publication Date: 2021-10-15
JIANGMEN PENGJIANG HUALONG PACKING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the solar backplane film is mostly made of polyethylene film, which is made of ordinary high-pressure low-density polyethylene, linear low-density polyethylene and some metallocene low-density polyethylene. The main defects are: poor composite fastness, so It is easy to peel off from the bonded EVA layer, causing delamination; poor water resistance, large water vapor transmission, which easily leads to corrosion of components; poor weather resistance, easy to cause yellowing, power attenuation or even failure
The above defects greatly affect the service life of solar cells

Method used

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  • A solar cell backsheet film with high composite fastness
  • A solar cell backsheet film with high composite fastness
  • A solar cell backsheet film with high composite fastness

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A solar backplane film is composed of outer layer, middle layer and inner layer materials, and the components of each layer are as follows.

[0028] Table 1 Example 1 The proportion of components in each layer

[0029]

[0030]

[0031] Among them, the melt index of the outer material ethylene-octene copolymer is 2g / 10min, and the density is 0.810g / cm 3 ; The melt index of the middle material metallocene high-density polyethylene is 0.05 / 10min, and the density is 0.900g / cm 3 ;The melt index of the inner material low-density polyethylene is 2g / 10min, and the density is 0.900g / cm 3 .

[0032] The preparation method of above-mentioned solar back plate film is as follows:

[0033] 1. Put the raw materials of each layer into the outer layer extruder, middle layer extruder, and inner layer extruder respectively for melting and plasticizing, and then output them. The materials output by each extruder are transported to the die head, extruded and blown film and Fusion...

Embodiment 2

[0048] A solar backplane film is composed of outer layer, middle layer and inner layer materials, and the components of each layer are as follows.

[0049] Table 3 embodiment 2 each layer component ratio

[0050]

[0051] The preparation method of the above-mentioned solar backboard film is the same as that in Example 1.

[0052] Among them, the melt index of the outer material propylene-octene copolymer is 7g / 10min, and the density is 0.895g / cm 3 ; The melt index of the middle material metallocene high-density polystyrene is 6g / 10min, and the density is 0.970g / cm 3 ;The melt index of the inner low-density polypropylene is 15g / 10min, and the density is 0.940g / cm 3 .

[0053] The setting process of extruder process parameter is similar to embodiment 1, and concrete process parameter is as shown in the following table:

[0054] Extruder in table 4 embodiment 2 is for each layer component preparation parameter

[0055]

Embodiment 3

[0057] A solar backplane film is composed of outer layer, middle layer and inner layer materials, and the components of each layer are as follows.

[0058] Table 5 embodiment 3 each layer component ratio

[0059]

[0060]

[0061] The preparation method of the above-mentioned solar backboard film is the same as that in Example 1.

[0062] Among them, the melt index of the outer material ethylene-butene copolymer is 3.5 / 10min, and the density is 0.882 / cm 3 ; The melt index of the middle layer material metallocene polypropylene is 2.3g / 10min, and the density is 0.900g / cm 3 ;The melt index of the inner material polyhexene is 7g / 10min, and the density is 0.900g / cm 3 .

[0063] The setting process of extruder process parameter is similar to embodiment 1, and process parameter is as shown in the table below:

[0064] Extruder in table 6 embodiment 3 is for each layer component preparation parameter

[0065]

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Abstract

The invention relates to a solar cell backboard film, which is composed of outer layer, middle layer and inner layer materials. The material of the outer layer is olefin copolymer, the material of the middle layer is metallocene polyolefin, and the material of the inner layer is polyolefin. Wherein the outer layer of the solar cell back sheet, between the middle layer and the inner layer material, between the inner layer material and the EVA layer of the solar cell back sheet, and between the outer layer material and the middle layer PET of the solar cell back sheet due to the synergistic effect. It has tight composite fastness, which minimizes the chance of delamination of solar cell backsheets. Moreover, the materials of the outer layer, the middle layer and the inner layer of the solar battery backplane film have strong intermolecular forces among each other, thereby improving the water resistance and water vapor corrosion resistance of the solar battery backplane film.

Description

technical field [0001] The invention relates to the field of functional thin films, in particular to a solar cell backboard film with high composite fastness. Background technique [0002] With the continuous consumption of global energy and increasingly severe environmental problems, people began to gradually pay attention to green, clean and renewable energy. As an inexhaustible source of energy, solar energy has become a research hotspot in the new generation of renewable energy. According to reports, by 2050, the utilization rate of solar energy will account for more than 40% of the entire energy system. At present, among the devices for converting solar energy into electric energy, solar panels are commonly used devices. In the solar panel module structure, the solar cell backsheet is located at the outermost layer on the back of the module, which protects and supports the solar panel, and protects the core components of the solar cell from water vapor erosion; The c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/08B32B27/18B32B27/32B32B33/00H01L31/049
CPCB32B27/08B32B27/18B32B27/32B32B27/327B32B33/00B32B2250/03B32B2307/7246B32B2457/10B32B2457/12H01L31/049Y02E10/50
Inventor 文斌森魏洪媚
Owner JIANGMEN PENGJIANG HUALONG PACKING MATERIAL
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