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US 8,529,671 B2Granted
Electret webs with charge-enhancing additives
Assignee3M Innovative Properties Comany
InventorsJohn M. Sebastian, Fuming B. Li, Marvin E. Jones, Luke T. Dressel, Daniel A. Japuntich
Life of this patent
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Abstract
Electret webs are presented which include a blend of a thermoplastic resin and a charge additive. The charge additives include ester-substituted and amide-substituted trianilino triazine materials. The webs prepared from the blends may be in the form of films or non-woven fibrous webs. Non-woven microfiber webs are useful as filtration media.
Claims20
An electret web comprising:
- a thermoplastic resin;
- and
- a charge additive comprising an ester-substituted and/or amide-substituted trianilino triazine material, wherein the web comprises a non-woven microfiber web.
An electret filter media comprising:
- a non-woven microfiber web comprising a blend of:
- a thermoplastic resin;
- and
- a charge additive comprising an ester-substituted and/or amide-substituted trianilino triazine material.
1 more element
A method of preparing an electret web comprising:
- providing a thermoplastic material;
- providing a hot melt processable charge additive comprising an ester-substituted and/or amide-substituted trianilino triazine material;
- hot melt mixing the thermoplastic material and the charge additive;
- melt blowing the mixed thermoplastic material and charge additive to form a microfiber web;
- and
- electrostatically charging the web.
3 more elements
Dependencies are inferred from the claim text.