Method for producing pitch-based carbon fiber silver and spun yarn
US7634840B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2004 |
| Grant date | Dec 22, 2009 |
| Priority date | — |
| Expiry date | Aug 1, 2026 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD10B2101/12
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A pitch-based carbon fiber sliver providing a high-strength carbon fiber spun yarn is efficiently produced by providing a pitch-based carbon fiber mat comprising a mass of piled-up pitch-based carbon fibers of which fiber extension directions are aligned preferentially in one direction; and directly subjecting the carbon fiber mat to drawing and carding by means of a carding machine while moving the mat in said one preferential alignment direction. The thus-obtained carbon fiber sliver is drawn and twisted to produce a pitch-based carbon fiber spun yarn containing at least 3 wt. % of fibers having a fiber length of at least 150 mm, a number of primary twist of 50-400 turns/m and a tensile strength of at least 0.10 N/tex.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.