Stabilized fiber bundle and method of manufacturing carbon fiber bundle
US11319648B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 2019 |
| Grant date | May 3, 2022 |
| Priority date | — |
| Expiry date | Jul 29, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2701/31
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method manufactures a flame-retardant fiber bundle by flame retarding treatment of a polyacrylonitrile-based precursor fiber at 200-300° C. in an oxidizing atmosphere, wherein a fiber bundle is caused to travel so as to sequentially pass between an nth roller and an (n+1)th roller (n being an integer of at least 1 and no more than [m−1]) in a roller group formed from m (m being an integer of 3 or greater) contiguously set rollers, the roller axes of the m continuously set rollers being parallel to each other and perpendicular to the direction of travel of the fiber bundle, the roller diameter being 5-30 mm, and the specific gravity of the fiber bundle being 1.20-1.50.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.