Multilayer film comprising: - an adhesive layer A having a thickness ranging from 7 to 50 μm and consisting of an extrudable hot-melt self-adhesive composition a which has a melt flow index (or MFI), measured for a temperature of 190°C and a total weight of 2.16 kg, ranging from 0.01 to 200 g/10 minutes and which comprises, on the basis of the total weight of said composition a: - from 40% to 70% by weight of a composition a1 of styrene block copolymers comprising at least one elastomer block, said composition a1 consisting, on the basis of its total weight: - of 30% to 90% by weight of at least one diblock copolymer chosen from the group comprising SI, SBI, SIB, SB, SEB and SEP, and - of 10% to 70% by weight of at least one triblock copolymer chosen from the group comprising SIS, SIBS, SBS, SEBS and SEPS; the total content of styrene units of said composition a1 ranging from 10% to 40% by weight on the basis of the total weight of a1; and - from 30% to 60% by weight of one or more tackifying resins a2 having a softening temperature of between 5 and 140°C; - a complexable thin layer B consisting of a thermoplastic b; and - a heat-sealable and cleavable layer C; the layers B and C being linked to one another by the layer A; and said film being characterized in that the layer C consists of a composition c comprising, on the basis of the total weight of c, a content by weight of at least 95% of at least one linear copolyester C1 obtained by polycondensation of a composition m of monomers comprising: - at least one diol (i), - at least one compound (ii) chosen from terephthalic acid or a diester derivative thereof, optionally substituted with an alkyl radical, and - at least one compound (iii) chosen from an aromatic or aliphatic dicarboxylic acid or a diester or anhydride derivative thereof; the amounts of the monomers (i), (ii) and (iii) used in the polycondensation being such that the softening temperature of C1 is below 190°C. - an adhesive layer A having a thickness ranging from 7 to 50 μm and consisting of an extrudable hot-melt self-adhesive composition a which has a melt flow index (or MFI), measured for a temperature of 190°C and a total weight of 2.16 kg, ranging from 0.01 to 200 g/10 minutes and which comprises, on the basis of the total weight of said composition a: - from 40% to 70% by weight of a composition a1 of styrene block copolymers comprising at least one elastomer block, said composition a1 consisting, on the basis of its total weight: - of 30% to 90% by weight of at least one diblock copolymer chosen from the group comprising SI, SBI, SIB, SB, SEB and SEP, and - of 10% to 70% by weight of at least one triblock copolymer chosen from the group comprising SIS, SIBS, SBS, SEBS and SEPS; the total content of styrene units of said composition a1 ranging from 10% to 40% by weight on the basis of the total weight of a1; and - from 30% to 60% by weight of one or more tackifying resins a2 having a softening temperature of between 5 and 140°C; - from 40% to 70% by weight of a composition a1 of styrene block copolymers comprising at least one elastomer block, said composition a1 consisting, on the basis of its total weight: - of 30% to 90% by weight of at least one diblock copolymer chosen from the group comprising SI, SBI, SIB, SB, SEB and SEP, and - of 10% to 70% by weight of at least one triblock copolymer chosen from the group comprising SIS, SIBS, SBS, SEBS and SEPS; the total content of styrene units of said composition a1 ranging from 10% to 40% by weight on the basis of the total weight of a1; and - of 30% to 90% by weight of at least one diblock copolymer chosen from the group comprising SI, SBI, SIB, SB, SEB and SEP, and - of 10% to 70% by weight of at least one triblock copolymer chosen from the group comprising SIS, SIBS, SBS, SEBS and SEPS; the total content of styrene units of said composition a1 ranging from 10% to 40% by weight on the basis of the total weight of a1; and - from 30% to 60% by weight of one or more tackifying resins a2 having a softening temperature of between 5 and 140°C; - a complexable thin layer B consisting of a thermoplastic b; and - a heat-sealable and cleavable layer C; - at least one diol (i), - at least one compound (ii) chosen from terephthalic acid or a diester derivative thereof, optionally substituted with an alkyl radical, and - at least one compound (iii) chosen from an aromatic or aliphatic dicarboxylic acid or a diester or anhydride derivative thereof;