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Solar battery back panel film and preparation method thereof

A technology for solar cells and backsheet films, applied in chemical instruments and methods, circuits, photovoltaic power generation, etc., can solve the problems of poor barrier performance, difficult to repair, and high hardness of composite films, and achieve excellent weather resistance, strong shock resistance, Simple preparation method

Inactive Publication Date: 2011-03-30
NANJING NAQUAN HI TECH MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of poor barrier performance of the solar battery backplane film in the prior art, high hardness of the composite film, and difficulty in repairing the board, the purpose of the present invention is to provide a solar battery that is soft, has good aging resistance and good barrier performance. Back sheet film, and a preparation method of said solar battery back sheet film is provided

Method used

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  • Solar battery back panel film and preparation method thereof
  • Solar battery back panel film and preparation method thereof
  • Solar battery back panel film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] see figure 2 , a solar cell backsheet film, which is a three-layer structure, including a PVDF layer 1, an adhesive layer 2 and a PET film base layer 3 in sequence.

[0035] Wherein, the PET film base layer 3 has a thickness of 75 μm; the PVDF layer 1 has a thickness of 37 μm; and the adhesive layer 2 has a thickness of 3 μm.

[0036] The PET film base layer 3 adopts a biaxially stretched polyethylene terephthalate magnetic white film.

[0037] The PVDF layer 1 is mixed and granulated by polyvinylidene fluoride resin, pigments and various additives in parts by weight of 100g, 2g, and 5g, melt-extruded at 240°C, cast and stretched in at least one direction 10-1000%, and then prepared by trimming and winding.

[0038] Described polyvinylidene fluoride resin melting index is 10g / 10min; Described pigment comprises titanium dioxide, zinc oxide and carbon black; Described auxiliary agent comprises whitening agent (PEB), dispersant (stearic acid), solvent (phosphoric acid ...

Embodiment 2

[0045] see image 3 , a solar battery back sheet film, which is a four-layer structure, including a PVDF layer 1, an adhesive layer 2, a PET film base layer 3 and an EVA film layer 4.

[0046] Among them, the thickness of the PET film base layer 3 is 75 μm; the thickness of the PVDF layer 1 is 37 μm; the thickness of the EVA film layer 4 is 250 μm; the thickness of the adhesive layer 2 is 3 μm.

[0047] The PET film base layer 3 adopts a biaxially stretched polyethylene terephthalate magnetic white film.

[0048]The PVDF layer 1 is mixed and granulated by polyvinylidene fluoride resin, pigments and various additives in parts by weight of 100g, 2g, and 5g, melt-extruded at 240°C, cast and stretched in at least one direction 10-1000%, and then prepared by trimming and winding.

[0049] Described polyvinylidene fluoride resin melting index is 10g / 10min; Described pigment comprises titanium dioxide, zinc oxide and carbon black; Described auxiliary agent comprises whitening agent...

Embodiment 3

[0058] see Figure 4 , a solar battery back sheet film, which is a five-layer structure, including a PVDF layer 1, an adhesive layer 2, a PET film base layer 3, an adhesive layer 2 and a PVDF layer 1.

[0059] Wherein, the PET film base layer 3 has a thickness of 250 μm; the adhesive layer 2 has a thickness of 3 μm; and the PVDF layer 1 has a thickness of 25 μm.

[0060] The PET film base layer 3 adopts a white film of biaxially stretched polyethylene terephthalate.

[0061] The PVDF layer 1 is mixed and granulated by polyvinylidene fluoride resin, pigments and various additives in parts by weight of 100g, 5g, and 10g, melt-extruded at 180°C, cast and stretched in at least one direction 10-1000%, and then prepared by trimming and winding.

[0062] Described polyvinylidene fluoride resin melting index is 8g / 10min; Described pigment comprises titanium dioxide, zinc oxide and carbon black; Described auxiliary agent comprises whitening agent (OB-1), dispersant (sodium stearate),...

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Abstract

The invention relates to a solar battery back panel film and a production method thereof. The solar battery back panel film comprises a PET (Polyethylene Terephthalate) thin film substrate layer and at least one polyvinylidene fluoride film layer, wherein the polyvinylidene fluoride film layer and the PET thin film substrate layer are compounded through an adhesive layer. The solar battery back panel film also comprises an EVA (Ethylene Vinyl Acetate Copolymer) film layer, and the EVA film layer and the PET thin film substrate layer are compounded by adopting a composite laminating process. The preparation method of the solar battery back panel film comprises the following steps of: carrying out surface corona treatment on the PET thin film substrate layer and the polyvinylidene fluoride film layer; coating an adhesive layer on the PET thin film substrate layer; and carrying out hot-pressing compounding on the adhesive-coated surface of the PET thin film substrate layer and the polyvinylidene fluoride film layer and then solidifying. The preparation method of the solar battery back panel film is simple, and the product has excellent weather fastness, higher lamination peel strength, good barrier property and good electric breakdown resistance.

Description

technical field [0001] The invention relates to a solar battery back plate film and a preparation method thereof. Background technique [0002] Traditional energy such as oil, coal and other non-renewable resources are decreasing day by day. Energy issues have increasingly become a bottleneck restricting the social and economic development of countries around the world. There are still 2 billion people in the world who do not have normal energy supply. Therefore, finding new energy has become a top priority. At this time, the whole world is turning its attention to renewable energy, hoping that renewable energy can change the energy structure of mankind and maintain long-term sustainable development. Among them, solar energy has become the focus of people's attention due to its unique advantages. Abundant solar radiation energy is an important energy source, which is inexhaustible, inexhaustible, and non-polluting. [0003] The solar cell is prepared by laminating low-iron ...

Claims

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Application Information

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IPC IPC(8): H01L31/0203H01L31/048H01L31/18B32B27/08B32B7/12B32B37/12B32B38/16H01L31/049
CPCY02E10/50Y02P70/50
Inventor 金怀龙
Owner NANJING NAQUAN HI TECH MATERIAL
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