Document Type
Patent
Publication Date
3-5-1996
Patent Number
patent number 5496627
Abstract
Disclosed are novel composite fibrous structures which have utility as filters. These composite structures have at least two layers. The first layer is a nonwoven fibrous structure made from uniquely grooved fibers. The second layer is of a fibrous material that offers high filter efficiency.. The first layer has significantly lower pressure drop and higher dust holding capacity than the second layer.
Application Number
08/491387
Assignees
Eastman Chemical Company (Kingsport, TN)
Filing Date
1995-06-16
Primary/U.S. Class
442/337
Other/U.S. Class
55/488, 442/400
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