Stable electret polymeric articles
US6893990B2 · kind B2 · utility
14Cited by
108References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 8, 2003 |
| Grant date | May 17, 2005 |
| Priority date | — |
| Expiry date | Apr 8, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/696
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A porous polymeric sheet is provided having an electrostatic charge and comprising a zero-three composite of a polymeric matrix and a ferroelectric material dispersed therein. The polymeric component comprises a non-polar thermoplastic polymer, such as a polyolefin, and a second thermoplastic polymer having polar functional units, such as a telomer. The composite material is formed into a porous sheet and is electrically or corona poled to create an electret material which is well suited four use in various filtration, air-masking and dust wipe applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.