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:
Apr. 19, 2011
Filed:
Aug. 01, 2008
Alan Smithies, Overland Park, KS (US);
Jack T. Clements, Lee's Summitt, MO (US);
David Charles Jones, Midlothian, VA (US);
Hyun Sung Lim, Midlothian, VA (US);
Alan Smithies, Overland Park, KS (US);
Jack T. Clements, Lee's Summitt, MO (US);
David Charles Jones, Midlothian, VA (US);
Hyun Sung Lim, Midlothian, VA (US);
BHA Group, Inc., Kansas City, MO (US);
E. I. duPont de Nemours and Company, Wilmington, DE (US);
Abstract
A method of making a composite filter media includes, in an exemplary embodiment, forming a nonwoven fabric mat that includes a plurality of synthetic fibers by a spunbond process, and calendaring the nonwoven fabric mat with embossing calendar rolls to form a bond area pattern comprising a plurality of substantially parallel discontinuous lines of bond area to bond the synthetic fibers together to form a nonwoven fabric, the nonwoven fabric having a minimum filtration efficiency of about 50%, measured in accordance with ASHRAE 52.2-1999 test procedure. The method also includes applying a nanofiber layer by electro-blown spinning a polymer solution to form a plurality of nanofibers on at least one side of the nonwoven fabric mat to form the composite filter media, the composite filter media having a minimum filtration efficiency of about 75%, measured in accordance with ASHRAE 52.2-1999 test procedure.