Process for the production of carbon filaments utilizing an acrylic precursor
US4112059A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 1974 |
| Grant date | Sep 5, 1978 |
| Priority date | — |
| Expiry date | Nov 14, 1994 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F9/22
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An improved overall process is provided for producing carbon filaments beginning with a multifilament acrylic precursor. The process facilitates the thermal transformation of the acrylic fibrous material in the absence of undesirable coalescence between adjoining filaments. An extremely thin deposition of colloidal silica initially is provided upon the surface of the multifilament acrylic precursor (as described), the fibrous material thermally stabilized in the absence of coalescence (as described), the colloidal silica substantially removed, and the thermally stabilized fibrous material carbonized (as described). The resulting carbon filaments exhibit improved physical properties and particularly are suited for use as fibrous reinforcement in a resinous matrix.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.