Patent ID: 9428850
Filing Date: 2016-08-30
CPC Classification: B05D,D01D,D01F,D02J,D10B

Claim Text:
1. A process for producing a PAN based carbon fibre, comprising the following steps: a) mixing PAN and a solvent in a solid-to-liquid ratio of 0.1%-25% in a reactor, and heating and stirring the resulting mixture until the PAN is dissolved completely to obtain a solution; b) adding a catalyst in an amount of 0.05 wt. %-0.1 wt. % based on the weight of the PAN to the solution from step a), followed by bubbling an oxygen-containing gas at 5 ml/min to obtain a spinning solution, then pre-oxidizing the spinning solution for 1-2.5 hrs at 60° C.-250° C.; c) spinning the spinning solution through a spinning machine, followed by washing with water, drawing and thermosetting to obtain a pre-oxidized fibre with good pre-oxidization degree, which is subjected to a carbonization process to obtain a high-performance carbon fibre.