Double-layer thermoplastic film for a photovoltaic module, comprising two layers, of which one layer forms the encapsulant and the other layer forms the backsheet, the encapsulant-backsheet assembly (22, 26) having a thickness of greater than 100 μm (micrometre), characterized in that: a) the encapsulant consists of a polyamide graft polymer comprising a polyolefin backbone, representing from 50% to 95% by weight of the polyamide graft polymer, containing a residue of at least one unsaturated monomer and at least one polyamide graft, representing from 5% to 50% by weight of said polyamide graft polymer, wherein: - the polyamide graft is attached to the polyolefin backbone by the residue of the unsaturated monomer comprising a function capable of reacting via a condensation reaction with a polyamide having at least one amine end group and/or at least one carboxylic acid end group, - the residue of the unsaturated monomer is attached to the backbone by grafting or copolymerization, - the polyolefin backbone and the polyamide graft being chosen so that said polyamide graft polymer has a flow temperature of greater than or equal to 75°C and less than or equal to 160°C, this flow temperature being defined as the highest temperature among the melting temperatures and glass transition temperatures of the polyamide graft and of the polyolefin backbone; b) the backsheet comprises a layer formed from a polymer with a Young's modulus of greater than 1.1 GPa (ASTM D638 standard), preferably greater than or equal to 1.3 GPa. a) the encapsulant consists of a polyamide graft polymer comprising a polyolefin backbone, representing from 50% to 95% by weight of the polyamide graft polymer, containing a residue of at least one unsaturated monomer and at least one polyamide graft, representing from 5% to 50% by weight of said polyamide graft polymer, wherein: - the polyamide graft is attached to the polyolefin backbone by the residue of the unsaturated monomer comprising a function capable of reacting via a condensation reaction with a polyamide having at least one amine end group and/or at least one carboxylic acid end group, - the residue of the unsaturated monomer is attached to the backbone by grafting or copolymerization, - the polyolefin backbone and the polyamide graft being chosen so that said polyamide graft polymer has a flow temperature of greater than or equal to 75°C and less than or equal to 160°C, this flow temperature being defined as the highest temperature among the melting temperatures and glass transition temperatures of the polyamide graft and of the polyolefin backbone; - the polyamide graft is attached to the polyolefin backbone by the residue of the unsaturated monomer comprising a function capable of reacting via a condensation reaction with a polyamide having at least one amine end group and/or at least one carboxylic acid end group, - the residue of the unsaturated monomer is attached to the backbone by grafting or copolymerization, - the polyolefin backbone and the polyamide graft being chosen so that said polyamide graft polymer has a flow temperature of greater than or equal to 75°C and less than or equal to 160°C, this flow temperature being defined as the highest temperature among the melting temperatures and glass transition temperatures of the polyamide graft and of the polyolefin backbone; b) the backsheet comprises a layer formed from a polymer with a Young's modulus of greater than 1.1 GPa (ASTM D638 standard), preferably greater than or equal to 1.3 GPa.