Use of a polyethylene-based film in a photovoltaic module

A film composition for use in a photovoltaic module as a backsheet or as an encapsulant, said composition comprising, with respect to the total weight of the composition:

• from 10 to 90 wt % of a polyethylene A, wherein polyethylene A is a homopolymer or copolymer consisting of ethylene monomer units at greater than or equal to 80% by weight and optionally one or more other alpha olefin monomer units selected from the group consisting of propylene, 1-butene, 1-pentene, 3-methyl-1-butene, 1-hexene, 4-methyl-1-pentene, 3-methyl-1-pentene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, 1-eicosene, 1-docosene, 1-tetracosene, 1-hexacosene, 1-octacosene and 1;
• from 5 to 85 wt % of a polyolefin B, other than polyethylene A, carrying a reactive functional group X chosen from the anhydride carboxylic acids and epoxides;
• from 5 to 85% of polyolefin C, other than polyethylene A and polyolefin B, carrying a functional group Y capable of reacting with the functional group X.