METHOD OF PRODUCING CARBON FIBRE AND MATERIALS BASED ON CARBON FIBRE Russian patent published in 2011 - IPC D01F9/16 D06M13/513 D06M15/643 D01F9/12 

FIELD: chemistry.

SUBSTANCE: in continuous mode, the method involves saturation of initial fibres at the pre-carbonisation step with an aqueous emulsion containing an oligomeric resin, drying, thermal relaxation and carbonisation and, if needed, graphitation. Saturation is carried out in the aqueous emulsion of the oligomeric resin with high content of silane groups of general formula HO{[MeSi(OH)O][Me₂SiO]_m}_nH, where: Me is metal; m and n are integers or fractional numbers: m=1-3, n=3-10, with molecular weight of 900-2400 and viscosity of 520-1700 cP, in a spinning-finishing assembly when producing viscose industrial threads. Before saturation, the fibres are dried at 120-180°C for 10-15 s. Thermal relaxation is carried out at 160-200°C for 0.5-2.0 h and carbonisation is completed at temperature 600°C. Different textile structures, for example a net, fabric, knitted fabric or nonwoven material from the initial cellulose fibre materials is saturated.

EFFECT: invention enables to obtain carbon fibre materials with good physical and mechanical characteristics while reducing the coefficient of variation in strength characteristics.

4 cl, 8 ex