Filter media with irregular structure
AssigneeHollingsworth & Vose Company
InventorsBruce Smith, Maxim Silin, David T. Healey
Life of this patent
Estimating the term…
Abstract
Articles and methods relating to filter media are generally provided. In some embodiments, a filter media has an irregular surface structure. For instance, the filter media may comprise a plurality of peaks that are irregular in one or more ways. A ratio of a peak height standard deviation to an average peak height may be greater than or equal to 0.05, and/or a ratio of a peak spacing standard deviation to an average peak spacing may be greater than or equal to 0.08. In some embodiments, a filter media comprises a non-woven fiber web having a layer thickness of greater than 0.3 mm and/or a stiffness of less than or equal to 100 mg.
Claims17
An article, comprising:
- a layer, wherein:
- the layer comprises a plurality of peaks having an average peak spacing and a peak spacing standard deviation;
- a ratio of the peak spacing standard deviation to the average peak spacing is greater than or equal to 0.08;
- the layer has an average surface height of greater than 0 3 mm;
- the average surface height is an average of relative heights of each point in a relative surface topography with respect to a reference height;
- and
- the reference height is a height of which 95% of the points making up a measured surface topography are above and 5% of the points making up the measured surface topography are below.
An article, comprising:
- a layer, wherein:
- the layer comprises a plurality of peaks having an average peak height and a peak height standard deviation;
- a ratio of the peak height standard deviation to the average peak height is greater than or equal to 0.15 and less than or equal to 0.5;
- the layer has an average surface height of greater than 0 3 mm;
- the average surface height is an average of relative heights of each point in a relative surface topography with respect to a reference height;
- and
- the reference height is a height of which 95% of the points making up a measured surface topography are above and 5% of the points making up the measured surface topography are below.
Dependencies are inferred from the claim text.