US 12,378,701 B2
Method and device for stabilizing precursor fibers or films for producing carbon fibers or films
Manuel Clauss, Ostfildern (DE); Andreas Keller, Opfingen (DE); Erik Frank, Dornstadt (DE); Volker Bauch, Zell unter Aichelberg (DE); Frank Hermanutz, Leonberg (DE); Michael R. Buchmeiser, Remshalden (DE); and Gunter Fauth, Urbach (DE)
Assigned to CENTROTHERM INTERNATIONAL AG, Blaubeuren (DE)
Appl. No. 17/283,971
Filed by CENTROTHERM INTERNATIONAL AG, Blaubeuren (DE)
PCT Filed Oct. 10, 2019, PCT No. PCT/EP2019/077438
§ 371(c)(1), (2) Date Apr. 9, 2021,
PCT Pub. No. WO2020/074623, PCT Pub. Date Apr. 16, 2020.
Claims priority of application No. 102018217354.0 (DE), filed on Oct. 10, 2018.
Prior Publication US 2021/0355610 A1, Nov. 18, 2021
Int. Cl. D01F 9/16 (2006.01); C08L 1/02 (2006.01); C08L 33/20 (2006.01); C08L 97/00 (2006.01); D01F 9/17 (2006.01); D01F 9/22 (2006.01)
CPC D01F 9/16 (2013.01) [C08L 1/02 (2013.01); C08L 33/20 (2013.01); C08L 97/005 (2013.01); D01F 9/17 (2013.01); D01F 9/225 (2013.01); C08L 2201/08 (2013.01); C08L 2203/12 (2013.01); C08L 2205/03 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method for stabilizing precursor fibers for the production of carbon fibers, comprising the steps of:
continuously introducing, passing and removing the precursor fibers into, through and from a process chamber;
setting a predetermined process gas atmosphere different in composition from ambient air in said process chamber, said process gas atmosphere being below atmospheric pressure and containing air and/or pure oxygen as a reactive component and/or catalyst, the air and/or pure oxygen having a predetermined partial pressure;
while the precursor fibers are in the process chamber, heating the precursor fibers to at least a first temperature and maintaining the first temperature for a predetermined period of time, wherein the method is free from steps in which magnetic fields are applied to the precursor fibers in the process chamber.