The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 08, 2011
Filed:
Jul. 31, 2006
John M. Brandner, St. Paul, MN (US);
William J. Kopecky, Hudson, WI (US);
Seyed A. Angadjivand, Woodbury, MN (US);
James E. Springett, Hudson, WI (US);
Timothy J. Lindquist, Woodbury, MN (US);
John M. Brandner, St. Paul, MN (US);
William J. Kopecky, Hudson, WI (US);
Seyed A. Angadjivand, Woodbury, MN (US);
James E. Springett, Hudson, WI (US);
Timothy J. Lindquist, Woodbury, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A porous monocomponent nonwoven web contains a bimodal mass fraction/fiber size mixture of intermingled continuous microfibers and larger size fibers of the same polymeric composition. There are at least five times as many microfibers as larger size fibers, and a histogram of the mass fraction of fibers vs. fiber size exhibits a larger size fiber mode greater than 10 μm. The web may be made by flowing fiber-forming material through a die cavity having larger size orifices and at least five times as many smaller size orifices to form filaments, attenuating the filaments into fibers and collecting the attenuated fibers to form the nonwoven web. The web is especially well suited to the manufacture of self-supporting three dimensional articles such as molded cup-shaped respirators and pleated air filters.