| abstract |
Electret webs include thermoplastic resins and charge-enhancing additives. The charge enhancing additive is a fused aromatic thiourea, a fused aromatic urea compound, or a combination thereof. The charge enhancing additive may also comprise a hindered amine light stabilizer compound. The electret web can be a non-woven fibrous web or film. Electret webs are suitable for use as filter media. |