公开(公告)号：US20240301590A1

公开(公告)日：2024-09-12

申请号：US18570185

申请日：2022-08-19

Applicant: Hexcel Corporation

Inventor： Anne Ruminski ,  Peter Ferrin

IPC: D01F9/20 ,  D02J1/22 ,  D02J13/00

CPC classification number: D01F9/20 ,  D02J1/222 ,  D02J1/224 ,  D02J1/228 ,  D02J13/001 ,  D10B2101/12 ,  D10B2401/061 ,  D10B2401/063

Abstract: The invention is directed to carbon fibers having high tensile strength. The invention also provides a method and apparatus for making the carbon fibers. The method comprises advancing a precursor fiber through a plurality of passes through an oxidation oven, where stretching during the initial passes is minimized or eliminated entirely, or made negative, followed by controlled stretching over a series of passes, using rollers of increasing speed.