Stable polymeric electret materials

Details Stable polymeric electret materials Stable polymeric electret materials

B - Operations, Transporting

01

D

B01D 39/16 (2006.01)

Patent

CA 2336213

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 for use in various filtration, air-masking and dust wipe applications.

L'invention concerne une feuille polymère poreuse ayant une charge électrostatique et comprenant un composite zéro-trois d'une matrice polymère et d'un matériau ferroélectrique dispersé dans ladite matrice. Le composant polymère comprend un polymère thermoplastique non polaire, tel qu'une polyoléfine, et un second polymère thermoplastique à unités fonctionnelles polaires, tel qu'un télomère. Le matériau composite est transformé en une feuille poreuse, et il est polarisé électriquement ou par effet corona pour créer un matériau électret tout à fait approprié pour diverses applications de filtration, de masques à air et d'élimination de la poussière.

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