Stock material or miscellaneous articles – Structurally defined web or sheet – Continuous and nonuniform or irregular surface on layer or...
Patent
1995-05-26
1997-06-24
Choi, Kathleen
Stock material or miscellaneous articles
Structurally defined web or sheet
Continuous and nonuniform or irregular surface on layer or...
428 92, 428 93, 428171, 428167, 428220, 428156, 428903, 12820619, 12820612, 12820621, D04H 104, A62B 1802, A62B 2300
Patent
active
056415559
ABSTRACT:
Filter media is provided. The filter media comprises a web of melt blown microfibers having one surface substantially flat and the other surface having periodic wrinkle-like undulations. A method of making the filter media is also provided. The filter media is useful in electret filters when charged.
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Berrigan Michael R.
Olson David A.
Choi Kathleen
Griswold Gary L.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Rogers James A.
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