Patent ID: 8784503

Claim:
Method for the production of a high-strength fibrous material said method consisting of the steps of: solubilizing a natural fibre material in an alkaline manner, wherein the natural fibre material is treated with an alkaline material, without being subjected to mechanical stress a) for 10 minutes to 3 hours at a temperature of between 5 and 30° C. and then b) for 20 minutes to 1.5 hours at a temperature of between 80 and 150° C., the pH during the treatment according to a) and b) being in the range of from 8 to 14, and is then optionally washed and/or dried, optionally bleaching the fibre material, wherein the produced fibrous material has an average strength (elastic modulus), measured according to DIN EN ISO 5079 in N/mm 2 , of 8 000 to 60 000 N/mm 2 , wherein optional bleaching also takes place in a) and/or b), and wherein optionally during the treatment in a) and/or b), complexers, sequestering agents' surfactants and/or foam suppressors are additionally used.