Polyphenylsulfone-polytetrafluoroethylene blend for anti-wear tapes in flexible oil pipes

A process for producing a plastic product made of polyphenyl sulphone (PPSU) and polytetrafluoroethylene (PTFE), the process comprising:

• first extruding by mixing a mixture comprising PPSU and PTFE in a first extruder at a temperature of from 340° C. to 390° C., thereby obtaining a pellet;
• and
• second extruding by processing the pellet in a second extruder, thereby obtaining a plastic moulding,
• wherein the mixture comprises the PTFE in an amount of from 4.0% to 6.0% by weight and the PPSU in an amount of from 94.0% to 96.0% by weight, and the PTFE has a particle size smaller than 3 μm in an amount of from 8 to 12% by volume prior to the first extruding and the PTFE has a particle size smaller than 25 μm in an amount of at least 88% by volume prior to the first extruding.