Process for making polarized material
US4863648A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1987 |
| Grant date | Sep 5, 1989 |
| Priority date | — |
| Expiry date | Jun 25, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/42
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention relates to a process for making polarized material by forming a solution of a material capable of being polarized with a polarization solvent which can be removed by evaporation. The material in solution is poled to provide a polarized material which is free or substantially free of mechanically-induced orientation and which polarization is essentially stable up to the crystal melting point of the polar crystals or to softening point of the polarized material if non-crystalline. The polarization solvent can be removed from the solution as desired either to a reduced level or completely, such as during poling or before or after poling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.