Backing film for photovoltaic module with improved pigment dispersion

A multilayer film, comprising, in the order listed:

• a) a first outermost surface layer of a moulding composition, comprising:
• at least 35% by weight of polyamide;
• and
• from 1 to 65% by weight of a light-reflecting filler, wherein the % by weight is based on the weight of the moulding composition of the first outermost surface layer;
• c) the second outermost surface layer opposite to the first outermost surface 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 the % by weight is based on the weight of the moulding composition of the second outermost surface layer;
• and
• wherein
• at least one of the first outermost surface layer and second outermost surface layer 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,
• the first outermost surface layer and the second outermost surface layer are in direct succession,
• a thickness of the first outermost surface layer is from 15 to 100 μm, and
• a thickness of the second outermost surface layer is from 100 to 500 μm.