Stable electret polymeric articles

Details Stable electret polymeric articles Stable electret polymeric articles

2005-05-17

2005-05-17

Juska, Cheryl A. (Department: 1771)

Fabric (woven, knitted, or nonwoven textile or cloth, etc.)

Nonwoven fabric

Including strand or fiber material which is stated to have...

C442S221000, C442S286000, C442S301000, C442S370000, C442S381000, C442S394000, C442S400000, C442S401000, C442S408000, C428S131000, C428S304400, C428S323000, C428S372000, C428S500000, C055SDIG003, C307S400000

Reexamination Certificate

active

06893990

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.

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