Use of a sealable and treatable composition in retort, to make containers for medical, pharmaceutical or nutritional applications from mono- or multi-stratified structures that include at least one layer comprising a composition, in which the composition is free of migratory substances and it comprises a mixture of two components, the first component comprising at least one propylene / [alpha] -olefin (A) copolymer with a content of [alpha] -olefin of 2 to 20 percent by weight, · comprising the second component at least one propylene / [alpha] -olefin copolymer (B) and / or at least one propylene homopolymer (C), wherein · the propylene / [alpha] -olefin copolymer (A) has at least one DSC melting area other than 30 to 110 ° C that has a heat of fusion of more than 1 J / g but less than 65 J / g, · the propylene / [alpha] -olefin (B) copolymer has a melting point per DSC of 130-170 ° C, · the homopolymer of propylene (C) has a melting point per DSC of 130-170 ° C, and where · the total amount of polymers (A), (B) and (C) is at least 80 percent by weight of the composition · The amount of polymer (A) is between 15 and 85 percent by weight of the total amount of polymers (A), (B) and (C).Uso de una composición sellable y tratable en retorta, para elaborar recipientes para aplicaciones médicas, farmacéuticas o nutricionales a partir de estructuras mono- o multiestratificadas que incluyen al menos una capa que comprende una composición, en el que la composición está libre de sustancias migratorias y comprende una mezcla de dos componentes, · comprendiendo el primer componente al menos un copolímero de copolímero de propileno/[alfa]-olefina (A) con un contenido de [alfa]-olefina de 2 a 20 por ciento en peso, · comprendiendo el segundo componente al menos un copolímero de propileno/[alfa]-olefina (B) y/o al menos un homopolímero de propileno (C), en donde · el copolímero de propileno/[alfa]-olefina (A) tiene al menos un área de fusión por DSC distinta entre 30 y 110°C que
