US Patent:
20130037481, Feb 14, 2013
Inventors:
Lahoussaine Lalouch - Noyon, FR
Gerry A. Hoffdahl - Scandia MN, US
Tien T. Wu - Woodbury MN, US
Bret W. Ludwig - Oakdale MN, US
Bernard Vincent - Rueil Malmaison, FR
Jean Le normand - Versailles, FR
David L. Vall - Woodbury MN, US
Laurie L. Poluha - Woodbury MN, US
Jimmy M. Le - St. Paul MN, US
Assignee:
3M INNOVATIVE PROPERTIES COMPANY - St. Paul MN
International Classification:
B01D 39/00
B01D 39/14
B05D 5/00
US Classification:
210435, 427244, 210505, 2105021, 210504, 210489
Abstract:
Nonwoven fibrous webs including a multiplicity of discrete fibers, a population of sub-micrometer fibers having a population median diameter less than one micrometer adjoining the discrete fibers, and a multiplicity of chemically active particulates secured to the nonwoven fibrous web. In some embodiments, more than 0% and less than 10% wt. of the nonwoven fibrous web is made of discrete fibers that are thermoplastic polymeric fibers, and which optionally at least partially melt and coalesce to secure the discrete polymeric fibers to each other. In certain embodiments, at least some of the particulates are bonded to the thermoplastic polymeric fibers. In other embodiments, at least some of the particulates are secured within interstices of the fibrous web, without substantial bonding to the discrete fibers. Methods of making and using such nonwoven fibrous webs are also described.
