Method and apparatus for producing para-aramid pulp and pulp produced thereby
US5202184A · kind A · utility
9Cited by
9References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1991 |
| Grant date | Apr 13, 1993 |
| Priority date | — |
| Expiry date | Jul 1, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2969
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for producing para-aramid pulp includes forming a liquid, actively-polymerizing solution and subjecting the solution to orienting flow which produces an optically anisotropic liquid solution with polymer chains oriented in the direction of the flow. When the solution has a viscosity sufficient to maintain the orientation of the polymer chains, the solution is incubated until it gels. The gel is cut transversely at intervals and para-aramid pulp is isolated from the gel. Para-aramid pulp produced by the process can be used similarly to pulp produced from spun fiber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.