Backing film for photovoltaic modules with improved pigment dispersion

• Main Authors: BEYER, MICHAEL, WIELPÜTZ, MARTIN, PAWLIK, ANDREAS
• Format: Patent
• Language: English; French; German
• Published: 14.09.2016
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; PERFORMING OPERATIONS; SEMICONDUCTOR DEVICES; TRANSPORTING

Foil comprises (a) a first outer layer made of a molding composition containing at least 35 wt.% polyamide and 1-65 wt.% light reflective filler, (c) a second outer layer made of a molding composition comprising at least 35 wt.% polyamide and 1-65 wt.% filler, respectively based on the total molding composition. The polyamide in the molding composition of the layer (a) and/or the layer (c) is a polyamide elastomer comprising polyether ester amide and polyether amide, where the molding composition of the layer (a) and/or the layer (c) comprise 1-25 wt.% polyamide elastomer. An independent claim is also included for a use of the foil as a back cover of a photovoltaic module, where the layer (a) is connected to a sealing layer, in which the solar cell is embedded; and #photovoltaic module comprising the foil as the back cover.