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US 7,309,372 B2Granted
Filter medium and structure
AssigneeDonaldson Company, Inc.
InventorsBrad E. Kahlbaugh, Keh B. Dema, Linda M. Olson
Life of this patent
Estimating the term…
Abstract
Thermoplastic bicomponent binder fiber can be combined with other media, fibers and other filtration components to form a thermally bonded filtration media. The filtration media can be used in filter units. Such filter units can be placed in the stream of a mobile fluid and can remove a particulate load from the mobile stream. The unique combination of media fiber, bicomponent binder fiber and other filtration additives and components provide a filtration media having unique properties in filtration applications.
Claims18
A filtration medium comprising a thermally bonded sheet comprising:
- (a) about 10 to 90% of a thermoplastic binder fiber having a fiber diameter of 5 to 50 micrometers and a fiber length of about 0.1 to 5 centimeters;
- and
- (b) about 10 to 90 wt % of a media fiber having a diameter about 1 to 50 micrometers and an aspect ratio of about 10 to 10,000;
- wherein the media has a thickness of about 0.1 to 2 millimeters, a solidity of about 2 to 25%, a basis weight of about 2 to 200 g-m−2, a pore size of about 0.2 to 100 micrometers and a permeability of about 2 to 500 ft-min−1.
1 more element
Dependencies are inferred from the claim text.