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:
Oct. 04, 2011
Filed:
Jul. 17, 2007
Seyed A. Angadjivand, Woodbury, MN (US);
Marvin E. Jones, Grant, MN (US);
James E. Springett, Webster, WI (US);
John M. Brandner, St. Paul, MN (US);
Timothy J. Lindquist, Woodbury, MN (US);
Seyed A. Angadjivand, Woodbury, MN (US);
Marvin E. Jones, Grant, MN (US);
James E. Springett, Webster, WI (US);
John M. Brandner, St. Paul, MN (US);
Timothy J. Lindquist, Woodbury, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
Shaped filtration articles are made from a monocomponent nonwoven web formed by flowing first and second fiber-forming materials of the same polymeric composition through first and second die cavities in respective fluid communication with first and second sets of orifices in a meltblowing die tip. The first fiber-forming material flows at a lesser flow rate or viscosity through the first die cavity and first set of orifices to form a set of smaller size filaments and the second fiber-forming material flows at a greater flow rate or viscosity through the second die cavity and second set of orifices to form a set of larger size filaments. The collected nonwoven web contains a meltblown bimodal mass fraction/fiber size mixture of intermingled continuous microfibers and larger size fibers of the same polymeric composition.