The Rhodia group, one of France's key producers of polyamide yarns and fibres, has raised the cost of all its performance yarns by five per cent. The increase on fibres is even steeper: they go up ten per cent. Rhodia blames the rising cost of raw materials. The company's performance fibres division has three factories in France but also produces on four other sites in Europe, including a plant in Poland. Overall it employs some 830 workers.