Evonik Degussa Gmbh

Evonik Operations Gmbh

Martin Wielpuetz

Harald Haeger

Andreas Pawlik

Roland Wursche

Michael Beyer

Kirsten Alting

Franz-Erich Baumann

Sonja Bollmann

A multilayered laminate film containing dispersed pigment which is suitable as a back cover for a solar module is provided. The film comprises, in the order listed: a) a layer of a moulding composition which comprises: at least 35% by weight, of polyamide; and from 1 to 65% by weight of a light-reflecting filler; b) optionally, a layer of a thermoplastic moulding composition; and c) a layer of a moulding composition which comprises at least 35% by weight, of polyamide; and from 1 to 65% by weight of a light-reflecting filler; wherein at least one of layers a) and c) further comprises from 1 to 25% by weight of the layer composition of a polyamide elastomer which is a polyetheresteramide, a polyetheramide or a combination thereof. A solar module containing the multilayered laminate film is also provided.

Backing film for photovoltaic module with improved pigment dispersion

Multiple layer film and composite material produced therefrom

A multilayer film containing layers of polyamide and polyester, suitable as a back cover for a photovoltaic module is provided. The film comprises, in the order listed: a) a layer which comprises at least 35% by weight of polyamide; c) a layer which comprises at least 35% by weight, of a thermoplastic polyester; and e) a layer which comprises at least 35% by weight of polyamide; wherein the layers a) and e) further comprise 0.1 to 60% by weight, of a polyamine-polyamide graft copolymer, or the layer c) further comprises 0.1 to 30% by weight of polyamine-polyamide graft copolymer. The polyamine-polyamide graft copolymer comprises as copolymerized monomers: a polyamine having at least 4 nitrogen atoms and at least one polyamide-forming unit selected from the group consisting of a lactam, an &#x3c9;-aminocarboxylic acid and an equimolar combinations of a diamine and a dicarboxylic acid. In another embodiment, adhesion promoting layers are placed between the layers.

Multilayer film with polyamide and polyester layers for the production of photovoltaic modules

Multilayer films of polyamide and polypropylene which have good layer adhesion and are suitable for a back cover of a solar module are provided. In a first embodiment, the multilayer film contains in the order listed: a) a layer containing at least 35% by weight, of polyamide; c) a layer containing at least 35% by weight of a polypropylene; and e) a layer containing at least 35% by weight, of polyamide; wherein the layer c) further comprises a polypropylene having acid anhydride groups or a polypropylene compatible functionalized polyolefin having functional groups to adhere the layer c) to each of layers a) and e). In a second embodiment adhesion promoter layers are present between the respective polyamide and polypropylene layers.

Multilayer film having polyamide and polypropylene layers

A film whose outer layer is composed of a molding composition which is in essence composed of the following components:

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Martin Wielpuetz