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US 2013/0273685 A1Published application
Process for annealing photovoltaic encapsulation polymer film
AssigneeNovopolymers N.V.
InventorJohan Willy Declerck
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Abstract
A process for annealing photovoltaic polymer encapsulation film (3), the film comprising polymer molecules substantially oriented along a machine direction, characterized in that the film is heated, supported on a support surface of support means (12), with heating means to a relaxation temperature to increase the isotropy of the polymer molecules such that the film is at least partly annealed, the support means (12) comprising a fluid (13) between the film (3) and the support surface.
Claims15
1-19. (canceled)
A process for annealing photovoltaic polymer encapsulation film, comprising the steps of
- producing a photovoltaic polymer encapsulation film made of a functionalized polyolefin of the type ethylene vinylacetate (EVA) by extrusion along an extrusion direction, the film comprising polymer molecules oriented along a machine direction along the extrusion direction and
- annealing the thus obtained photovoltaic polymer encapsulation film by feeding the film in the form of a continuous sheet over a support surface of a support means and wherein a fluid is comprised between the film and the support surface and heating the film by infra red heating to a relaxation temperature to increase the isotropy of polymer molecules such that the film is at least partly annealed.
Dependencies are inferred from the claim text.