Patent ID: 9677196
Date: 2017-06-13
CPC Classifications: D01D,D01F

Claim:
1. A process for manufacturing carbon fibres, comprising a first step of spinning a fibre of a PAN precursor, and a second step of oxidation/carbonisation of said fibre, wherein: a. said spinning and oxidation/carbonisation step is carried out directly in line and continuously, therefore without any stocking buffer area of PAN precursor between said first and second steps; b. said spinning step is performed at a low speed, so that the outlet speed from the spinning step, downstream of the stretching operations, is a speed falling within a range of suitable processing speeds in the subsequent oxidation/carbonisation step; c. said spinning step is performed in a modular way on a plurality of spinning modules (M) aligned in one or more rows (A, B), each spinning module (M) having a productivity not above 10% of the overall productivity of the spinning step; d. in each individual spinning module (M), the fibres downstream of the spinning area follow zig-zag, rectilinear paths through deflection and driving rollers ( e. the fibre tows coming out of each spinning module (M) are arranged side by side with the fibre tows coming out of the preceding modules and/or the following modules (M), the fibre tows not undergoing lateral deviations with respect to the progress direction of the line, to form a single feeding belt (N) of the oxidation/carbonisation step.