EVA test
Silicon solar cell product bag sealing material body is EVA, which ethylene and vinyl acetate copolymer resin, chemical structure can be as follows
(CH2-CH2) a (CH-CH2)
0 101 CH2
EVA can be a hot melt adhesive, rather dry at room temperature with no anti-adhesive, to ensure that operation will occur after having a hot melt certain Monocrystalline Solar Modules conditions
Melt adhesive and crosslinking, and become fully transparent, long-term proven: it encapsulates and outdoor usage in cells were
Quite satisfactory results.
After curing the EVA can withstand modifications in the atmosphere and versatile. It’s going to cover underlay crystal silicon group “, the audience of encapsulated silicon chip products,
And protection of materials and the upper glass, the lower protective material TPT (polyvinyl fluoride film co-k), using vacuum lamination technology for that bonded
One.
On the other hand, it can be improved after glass bonding glass transmittance, AR plays a task, and also the solar the different parts of the input
Of your gain effect. Monocrystalline Solar PV Module
EVA between 0.4mm-0.6mm thickness, surface roughness, uniform thickness, containing cross-linking agent, curing temperature in I50C
Cross-linking, using extrusion molding process to form a stable layer.
EVA soil have two ways: 2 conventional fast curing curing, different EVA lamination process is different
Plus there is a use of UV agents, antioxidants and curing agents with the EVA film thickness of 0.4mm sealant as solar cells.
It and glass, TPT bond involving the seal.
Silicon solar modules used to encapsulate the EVA, the primary roots to become light performance and weather resistance properties to decide on.
1 Principle
EVA has excellent flexibility, impact resistance, flexibility, optical transparency, low temperature across the music of, a substantial, capacity environmental stress
Cracking resistance, weather resistance, chemical resistance, heat sealing.
EVA’s performance depends upon molecular weight of soil (shown by melt index MI) and vinyl acetate resin (expressed in VA) containing probably the most.
When MI is constant, VA flexible, soft, Bond. Compatibility and transparency improve, VA containing female lower, then close
Performance of polyethylene if the VA most abundant in certain time. MI to reduce the softening point decreased, while improving processing and surface gloss, but
Decreases the strength. Molecular weight increases. Can improve impact resistance and stress cracking resistance.
Different levels of leakage of glue on the EVA includes a relatively degree of influence Tong, EVA glue linking directly to the component affected the performance of Tong and the use of
Life within the molten state, EVA and crystalline silicon cells, glass. TPT produced bond, on this process both physical
There are also chemical bonding. Unmodified EVA transparent, soft, melt together of dry, low melting temperature, melt fluidity.
Nevertheless its poor heat resistance, easy extension of Chung and low elasticity. Cohesive strength is low and anti-poor cochlear degeneration, an easy task to produce thermal expansion and contraction cause product sheet
Fragmentation, the braided bonding delamination. Therefore, through caffeine glue EVA modified way, the process is EVA ‘Fan,
Add organic peroxide crosslinking agent, if the EVA is heated to a certain temperature, the decomposition of free crosslinker compile, trigger points EVA
Son involving the mix of three-dimensional network structure, sub-layer EVA crosslinking caused when the glue a lot more than 60% amount of commitment when LED Street Lights
Suffering from atmospheric changes, thermal expansion and contraction do not occur.
