AMUT supplies production lines for solar EVA film

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  • Width up to 2,100 mm
  • Dosing and extrusion/die units can process both liquid and solid additives
  • Calender rolls with special surface treatment

EVA is commonly used for the production of solar-photovoltaic panels. EVA film protects the photovoltaic cell, encapsulating and wrapping the silicon cells, and enables a good sealing and a high adherence with the outer glass sheet and with the back-sheet (lower layer). The Italian company AMUT supplies complete production lines to produce such EVA films.

Amut line concept for EVA

Width up to 2,100 mm

Films can be produced in a width of 1,050 mm to 2,100 mm, and in a thickness range from 0,3 to 0,8 mm. All units of the line are purposely designed for this application and to not compromise the film dimensional stability, according to the company.

Dosing and extrusion/die units can process both liquid and solid additives

The gravimetric dosing and extrusion/die units can process both liquid and solid additives thus assuring an optimal melting of the polymers in order to give the film the necessary UV resistance and to avoid the yellowing effect which would cause a lack of efficiency during energy production. There is no cross-linking during the extrusion process.

Calender rolls with special surface treatment

The calender has 3 rolls with special surface treatment to handle EVA material and to avoid the stickiness of the film on the rolls. The calender, equipped with independent drives, has a further special stabilization unit system. The cooling phase must be progressive to reduce the tension at minimum level.

A sophisticated thermoregulation system is essential, for both extrusion and cooling processing steps. The winding system can wind-up, directly in-line, the film in reels or permit to laminate in-line a separating film sheet (mask film) or a silicone paper film to protect the EVA film completely. There is also the possibility to emboss on one sheet side allowing the adherence with the glass sheet during the solar cells manufacturing.

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