Use of PEBA having long blocks for the manufacture of all or part of a catheter

A process for manufacturing a burst-proof catheter balloon, said process comprising:

• a) a step of providing a copolymer containing polyether blocks and polyamide blocks in which said copolymer has the following characteristics:
• 1) number-average molecular mass of the polyether blocks greater than 500 g/mol,
• 2) number-average molecular mass of the polyamide blocks greater than 13,000 g/mol, and
• 3) the copolymer comprises polyether blocks composed of a majority of PTMG monomer units,
• 4) a Shore hardness of greater than 72;
• b) an optional step of mixing said copolymer with at least one other polymer and/or at least one additive, so as to manufacture a composition comprising:
• 1) from 30% to 100% by weight of a said copolymer containing polyether blocks and polyamide blocks
• 2) from 0 to 70% by weight of at least one other polymer chosen from polyamides, TPU, COPE, PVC, ABS, PS, PET, PETE, PVDF, ETFE, Polyimide, PEEK, PEKK, and silicone,
• 3) from 0 to 40% of at least one additive, relative to the total weight of the composition;
• c) a step of processing said copolymer or said composition at a temperature within the range from 200 to 300° C.;
• d) a step of forming the balloon at a temperature below the Tm (melting point) of the copolymer;
• e) a step of recovering the balloon.