Poromeric material having uniformly distributed electrets for maintaining an electrostatic charge
US5384337A · kind A · utility
Inventor
Key dates
| Filing date | Feb 5, 1993 |
| Grant date | Jan 24, 1995 |
| Priority date | — |
| Expiry date | Feb 5, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L27/18
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A poromeric material for maintaining an electrostatic charge is provided, the material including a matrix of fibers, a polymeric binder for binding the matrix, and electrets present substantially uniformly throughout the poromeric material. Also provided are methods for making the poromeric material. In one embodiment, a polymeric binder mixture having electrets substantially uniformly contained therein is formed. The matrix of fibers is impregnated with the mixture and cured, whereby the electrets are substantially uniformly distributed throughout the matrix to produce the electrostatic poromeric material. In an alternative embodiment, the electrets are contained in the fibers of the matrix. The poromeric material may be used to encase a core to form a roller, for example, a hickey-removing roller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.