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Eva Film Machine Eva Solar Film Extrusion Line Single Screw Extruder
1. Introduction of EVA/POE solar film extrusion line
(1) The EVA POE film extrusion line of Gwell Machinery Co., Ltd.
adopts the casting process to produce EVA POE solar cell
encapsulation film machine. The main raw material is imported vinyl
acetate copolymer EVA POE, added with imported plastic additives
and then heated, cast and extruded. The adhesive film is non-sticky
at room temperature, and it is convenient for cutting operation.
After hot pressing, thermal cross-linking curing and bonding
enhancement reaction will occur, resulting in permanent bonding and
sealing. It is a novel thermosetting hot-melt adhesive film.
(2) Compared with EVA film machine, the biggest advantage of POE
film machine is low water vapor transmission rate and high volume
resistivity, which ensures the safety and long-term aging
resistance of the module in high temperature and high humidity
environment, and ensures long-term use of components. Specifically,
the superior performance of the POE film relative to the EVA film
machine is that the POE film machine is a copolymer of ethylene and
octene, is a saturated fatty chain structure, and has fewer
tertiary carbon atoms in the molecular chain, showing good weather
resistance, UV aging resistance, excellent heat resistance and low
temperature resistance, so POE film has better aging resistance
than EVA film machine. Through modification methods such as
photo-grafting polar monomer, plasma surface treatment or reactive
grafting modification to POE, it can improve the adhesion of POE
film and glass, backplate and other materials, and has excellent
interfacial adhesion performance.
(4) It is suitable for high-efficiency double-sided batteries,
which can effectively enhance the conversion efficiency of the
battery. Compared with ordinary single-sided power generation
modules, it increases the power generation rate and reduces the
cost of electricity. At the same time, the modules can be placed
vertically and have more utilization methods. The POE film
extrusion line has a lower water vapor transmission rate and
greater cohesion. It is more suitable for double-glass modules, so
that the produced double-glass modules do not require edge sealing
and have a longer service life.
2. Comparison and introduction of POE film machine and EVA film
machine
Because the EVA film machine has the features of low strength, high
water vapor transmission rate and water absorption rate, and its
poor weather resistance, it needs to be edge-sealed when used on
double glass modules. However, water vapor will still pass through
during normal use, resulting in the film atomization which affects
the light transmittance and reduces the power generation of the
module.
And POE has a new type of polyolefin thermoplastic elastomer with
narrow relative molecular mass distribution and narrow comonomer
distribution and controllable structure.
There are currently two types of POE film extrusion line on the
market. One is a non-crosslinked polyolefin packaging material that
does not contain a crosslinking agent and uses a combination of
functional polymers to make the material's heat resistance and
adhesion meet the requirements of use. The other is a cross-linked
polyolefin encapsulating material containing peroxide cross-linking
agent or silane cross-linking agent and tackifier. This kind of
film is similar to EVA film extrusion line in terms of production
technology and process.
Compared with EVA film, the biggest advantage of POE film is low
water vapor transmission rate and high volume resistivity, which
ensures the safety and long-term aging resistance of the module in
high temperature and high humidity environment, so that the module
can be used for a long time. Generally speaking, the performance of
POE film machine is superior to EVA film machine.
3. Specification:
Extruder type | GWS160 | GWS160 | GWS180 | GWS180 |
raw material | EVA ,POE | EVA ,POE | EVA ,POE | EVA,POE |
Product width | 2200mm, 2400mm, 2600mm | |||
Product thickness | 0.2mm -1mm | 0.2mm -1mm | 0.2mm -1mm | 0.2mm -1mm |
Maximum linear speed | 10m/min ,12m/min,15m/mn |
Extruder type | Co-extrusion GWS160+GWS160 | Co-extrusion GWS180+GWS160 | Co-extrusion GWS180+GWS180 |
raw material | EVA ,POE | EVA ,POE | EVA,POE |
layers | A,A/B/A | ||
Product width | 2400mm,2600mm | ||
Product thickness | 0.2mm -1mm | 0.2mm -1mm | 0.2mm -1mm |
Maximum linear speed | 15m/min, 16m/mn, 18m/min |