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US 5,582,907 AGranted
Melt-blown fibrous web
AssigneePall Corporation
InventorDavid B. Pall
Life of this patent
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Abstract
The present invention provides a melt-blown fibrous nonwoven web comprising fibers ranging in average fiber diameters to about 2 microns or less, with a narrow fiber diameter distribution, and a high degree of weight uniformity. The present invention also provides methods of preparing, processing and using such fibrous webs, as well as products incorporating such fibrous webs.
Claims60
A melt-blown fibrous nonwoven web of fibers wherein 90% of the fibers of said web have a diameter ranging from a minimum fiber diameter to a maximum fiber diameter which is no more than about three times the minimum fiber diameter.
Dependencies are inferred from the claim text.