公开(公告)号：US11299824B2

公开(公告)日：2022-04-12

申请号：US16546990

申请日：2019-08-21

Applicant: Hexcel Corporation

Inventor： Peter Andrew Ferrin ,  Devon Cadwaladar Todd Thomas

IPC: D01F9/22 ,  C01B32/05 ,  D01F9/32

Abstract: A method for making carbon fiber in which the tensile strength of carbon fiber is increased without dehumidifying the ambient air that enters every oxidation oven in a multiple oxidation oven system. A positive effect on tensile strength is provided when ambient air entering only the first oven in a series of oxidation ovens is dehumidified. In addition, the ambient air entering the last oven is not dehumidified when one or more of the preceding oxidation ovens is operated with dehumidified air.