Barrier layer for hoses

A process for producing a hose comprising at least one barrier layer inner layer and an outer layer, wherein the process comprises:

• I) extruding a mixture comprising:
• a) FTPV pellets comprising at least one thermoplastic fluoropolymer, at least one fluororubber and a crosslinking agent;
• and,
• b) at least one carbon filler selected from carbon black, conductivity carbon black, graphene, carbon nanofiller, or a combination thereof, and/or irradiated PTFE;
• to form the barrier layer;
• II) applying the outer layer over the barrier layer;
• and,
• III) vulcanizing of the formed hose construction;
• wherein the crosslinking agent is selected from the group consisting of diamines, bisphenols, peroxides, polyols and quaternary ammonium salts;
• wherein the mixture is extruded at a temperature in the range from 240° C. to 300° C.;
• wherein crosslinking of the mixture is carried out during formation of the barrier layer;
• wherein the at least one carbon filler promotes the crosslinking;
• and,
• wherein the barrier layer is not meltable at 280° C. after the extruding and before the vulcanizing.