Filter media and articles including dendrimers and/or other components
AssigneeHollingsworth & Vose Company
InventorsDavid F. Sealey, Stuart Williams
Life of this patent
Estimating the term…
Abstract
Articles such as filter media, which include dendrimers and/or other components, are provided. The filter media may further include a water repellant (e.g., a fluorinated species) to impart desirable properties to the media such as high water repellency. The filter media may also have a high efficiency as a function of pressure drop (i.e., high gamma values). In some embodiments, the filter media includes a fiber web which may be formed of various components such as glass fibers. The fiber web can also include additional components such as synthetic fibers, binder components, as well as other additives. The media may be incorporated into a variety of filter element products.
Claims20
An article, comprising:
- a fiber web comprising a plurality of glass fibers having an average diameter between about 0.01 and about 10 microns and a water repellent comprising a fluorinated species comprising the formula —CnFmRy, where n is an integer less than or equal to 6, m is an integer greater than 1, R is zero, an atom or a group of atoms, and y is an integer greater than or equal to 0,
- wherein the fiber web has a basis weight between about 30 and about 400 gsm, an overall thickness between about 100 microns and about 5000 microns, an overall pressure drop between about 5 Pa and about 700 Pa, a water repellency between about 1 kPa and about 20 kPa, and a −log [(DOP penetration %/100)/pressure drop, Pa)]×100×9.8 value of at least 8, measured using DOP aerosol particles approximately 0.3 microns in diameter at a media face velocity of approximately 5.3 cm/sec.
An article, comprising:
- a fiber web comprising a plurality of glass fibers having an average diameter between about 0.01 and about 10 microns and a water repellent comprising a fluorinated species comprising the formula —CnFmRy, where n is an integer less than or equal to 6, m is an integer greater than 1, R is zero, an atom or a group of atoms, and y is an integer greater than or equal to 0,
- wherein the fiber web has a basis weight between about 30 and about 400 gsm, an overall thickness between about 100 microns and about 5000 microns, an overall pressure drop between about 5 Pa and about 700 Pa, a water repellency between about 1 kPa and about 20 kPa, and a −log [(DOP penetration %/100)/pressure drop, Pa)]×100×9.8 value of at least 8, measured using DOP aerosol particles approximately 0.18 microns in diameter at a media face velocity of approximately 2.5 cm/sec.
Dependencies are inferred from the claim text.