Patent ID: 11876232
Assignee: DONGHUA UNIVERSITY
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC H  D  Y | IPC D  H

Claim 4:
5. The method of claim 4, wherein before the carbonizing, the carbon fiber base paper is subjected to a cross-linking and a curing treatment, and the cross-linking is a chemical cross-linking or a hot-pressing cross-linking;
wherein a process of the chemical cross-linking is: first, immersing the carbon fiber base paper in a cross-linking bath composed of formaldehyde, hydrochloric acid, and water, pretreating at 22-25° C. for 24-60 h, then heating the cross-linking bath at a heating rate of 130-170° C./h until the solution boils, holding for 0.5-3 h, and last, taking out a carbon fiber raw paper, washing and drying; wherein a content of the formaldehyde in the cross-linking bath is 18.5 wt %, and a concentration of the hydrochloric acid is 12-18 wt %;
wherein a temperature of the hot-pressing cross-linking is 140-300° C., a time of the hot-pressing cross-linking is 5-30 min, and a pressure applied to the carbon fiber base paper is 5-15 MPa.