Process for the continuous level processing of poly-acrylonitrile in the hydrated condition
US3979176A · kind A · utility
1Cited by
3References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 31, 1975 |
| Grant date | Sep 7, 1976 |
| Priority date | — |
| Expiry date | Jan 31, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/932
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process is described for the continuous processing of fibers produced in the wet spinning process, particularly for the continuous dyeing and/or optical brightening of polyacrylonitrile tow in the hydrated condition, wherein, for the obtainment of a level processing effect, the wet tow is spread out, preferably by using spreaders such as curved rods or curved rolls, before being impregnated with the processing liquor, to form a ribbon having a maximum thickness of 2 mm. By this process there is obtained over the whole cross-section, evenly processed polyacrylonitrile tow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.