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Solar module back veneer comprising non-solvent bonding layers and manufacturing method thereof

A technology for solar cells and adhesive layers, applied in electrical components, final product manufacturing, sustainable manufacturing/processing, etc., can solve problems such as increased manufacturing costs, poor adhesive strength and weather resistance, and environmental pollution

Active Publication Date: 2012-07-11
DSM SUNSHINE SOLAR TECH (SUZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] (1) Use a large amount of solvent to dissolve the adhesive. During the processing, the volatilization of the solvent will pollute the environment, and the recovery of the solvent will also increase the cost
[0014] (2) The thickness of the adhesive layer is generally thin, less than or around 10 microns, and the adhesive strength and weather resistance are poor
[0015] (3) A separate process is required to coat the solvent-based adhesive on the fluoroplastic film or PET film, and dry to remove the solvent, which increases the manufacturing cost

Method used

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  • Solar module back veneer comprising non-solvent bonding layers and manufacturing method thereof

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Experimental program
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Effect test

Embodiment 1

[0077] Using Akema's PVDF film with a thickness of 20 microns; using linear low-density polyethylene LLDPE plastic particles, 1% silane coupling agent, 30% ethylene-butyl acrylate EBA, light stabilizer, and 0.5% anti-aging agent to melt and extrude pellets evenly after mixing, An LLDPE mixture is obtained. Ordinary polymethyl methacrylate PMMA is added with 0.5% light stabilizer and anti-aging agent, and 5% titanium dioxide, mixed uniformly, melted and extruded to granulate. The base film layer adopts common biaxially stretched ethylene terephthalate PET film with a thickness of 200 microns.

[0078] The compounded LLDPE and PMMA are melted and co-extruded onto the biaxially stretched PET film and the middle of the PVDF film through a double-layer extruder, and the extrusion temperature is 280°C, thereby obtaining a four-layer laminate of PVDF / PMMA / LLDPE / PET Membrane, the thickness of the four layers is 20 / 20 / 20 / 200 microns respectively.

[0079] Then on the other side of ...

Embodiment 2

[0087] Using ordinary extrusion-grade polyvinylidene fluoride PVDF plastic particles, adding 5% polymethyl methacrylate PMMA and 5% surface-treated titanium dioxide TiO 2 , Extrude, mix and granulate through a twin-screw extruder at a temperature of about 200°C to obtain PVDF mixture plastic particles. Using linear low density polyethylene LLDPE plastic particles, 1% of silane coupling agent, 30% of ethylene-butyl acrylate EBA, and 0.5% of light stabilizer and anti-aging agent are mechanically mixed in an ordinary mixer to obtain the LLDPE mixture.

[0088] The PVDF mixture and LDPE mixture are melted and co-extruded onto the biaxially stretched PET film through a double-layer extruder, and the extrusion temperature is 280°C, thereby obtaining a PVDF / PE / PET three-layer laminated film, and the thickness of the three layers is respectively 20 / 20 / 200 microns.

[0089] Then on the other side surface of the PET film, extrude the above LDPE mixture and add 5% of surface-treated tit...

Embodiment 3

[0097] Using ordinary extrusion-grade tetrafluoroethylene and hexafluoroethylene copolymer FEP plastic particles, adding 5% of surface-treated titanium dioxide TiO 2 , Extrude, mix and granulate through a twin-screw extruder at a temperature of about 320°C to obtain FEP mixture plastic particles. Low-density polyethylene LDPE plastic particles, 1% silane coupling agent, 30% ethylene-butyl acrylate EBA, and 0.5% light stabilizer and anti-aging agent are mechanically mixed in an ordinary mixer to obtain the LDPE mixture.

[0098] The FEP mixture and the LDPE mixture are melted and co-extruded onto the biaxially stretched PET film through a double-layer extruder, and the extrusion temperature is 300 ° C, thereby obtaining a FEP / PE / PET three-layer laminated film, and the thickness of the three layers is respectively 20 / 20 / 200 microns.

[0099] Then on the other side surface of the PET film, extrude the above LDPE mixture and add 5% of surface-treated titanium dioxide onto the PET...

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Abstract

The invention provides a solar module back veneer comprising non-solvent bonding layers. The solar module back veneer comprises: a base film layer, the bonding layers on two sides of the base film layer, a fourth thin layer and a fifth thin layer which are on another two sides of the bonding layers. The materials of the bonding layers are selected from one or more of the following components: polyethylene and a vinyl copolymer, polypropylene and modified polypropylene, thermoplastic polyurethane, acrylic resin and ABS series resin. The invention also provides a manufacturing method of the back veneer. According to the invention, a solvent adhesive can be completely avoided to be used. By using the method of the invention, pollution generated through volatilization and emission of the solvent to environment during a traditional back veneer manufacturing process can be avoided. Simultaneously, adhesive strength, ageing resistance, barrier performance and a long-term service ability can be increased. By using the non-solvent bonding layers, a fusion extrusion technology can be used during manufacturing the solar module back veneer, which substantially reduces production cost.

Description

technical field [0001] The present invention relates to a solar cell module polymer backboard and a manufacturing method thereof, in particular to an adhesive layer of the solar cell module backboard and a method for manufacturing the backboard by a melt extrusion process. Background technique [0002] At present, the main energy for human beings comes from fossil energy, including oil, coal and natural gas, but in the next hundred years or so, fossil energy will be exhausted, and in the process of using fossil energy, a large amount of carbon dioxide will be emitted, changing the atmosphere Composition of gases, causing the deterioration of the earth's climate. Green renewable energy without environmental pollution is the only way to solve human energy challenges and low carbon emissions. Solar power is one of the most important green renewable energy sources. At present, all countries in the world regard the development of solar power generation as a national energy stra...

Claims

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Application Information

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IPC IPC(8): H01L31/048H01L31/18H01L31/049
CPCY02E10/50Y02P70/50
Inventor 刘学习
Owner DSM SUNSHINE SOLAR TECH (SUZHOU) CO LTD
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