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US 9,718,012 B2Granted
Fine fiber media layer
AssigneeDonaldson Company, Inc.
InventorsHoo Young Chung, John R. B. Hall, Mark A. Gogins, Douglas G. Crofoot, Thomas M. Weik
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Abstract
Disclosed are improved polymer materials. Also disclosed are fine fiber materials that can be made from the improved polymeric materials in the form of microfiber and nanofiber structures. The microfiber and nanofiber structures can be used in a variety of useful applications including the formation of filter materials.
Claims13
A filter media comprising:
- (1) a fine fiber layer, and
- (2) a substrate layer;
- the fine fiber layer comprising a fiber comprising a polymer and an additive, the fine fiber having a fiber size of about 0.01 to 5 microns a basis weight of 0.0001 to 24 g-m−2, the substrate layer comprising a filtration media having a basis weight of about 8 to 200 grams/meter2;
- wherein the fine fiber comprises a layer of the additive on the surface of the fiber;
- wherein after exposure to air at 140° F. and 100% relative humidity for 16 hours, at least 50% of the fine fiber remains substantially unchanged for filtration purposes.
2 more elements
Dependencies are inferred from the claim text.