Surface modified filter media
First Claim
1. A filter media comprising:
- a non-woven web, comprising;
a first layer having a hydrophobic surface,wherein the first layer has a basis weight between 0.1 g/m2 and 100 g/m2, a thickness between 0.05 mm and 3 mm, and an air permeability between 0.3 CFM and 800 CFM;
a second layer having a hydrophobic surface,wherein the second layer has a basis weight between 0.1 g/m2 and 100 g/m2, a thickness between 0.05 mm and 3 mm, and an air permeability between 0.3 CFM and 800 CFM, and wherein the air permeability of the second layer is different from an air permeability of the first layer; and
a third layer, where a surface of the third layer is coated with a hydrophilic material,wherein the third layer has a basis weight between 0.1 g/m2 and 100 g/m2, a thickness between 0.05 mm and 3 mm, and an air permeability between 0.3 CFM and 800 CFM.
2 Assignments
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Accused Products
Abstract
Surface modified filter media, including surface modified filter media having enhanced performance characteristics, are provided. In some embodiments, a filter media may comprise two or more layers designed to enhance fluid separation efficiency. One or more of the layers may have at least a portion of a surface that is modified to alter and/or enhance the wettability of the surface with respect to a particular fluid. In certain embodiments involving a filter media including more than one surface modified layer, at least one surface modified layer may have a greater air permeability and/or mean flow pore size than that of another surface modified layer. Such a configuration of layers may result in the media having enhanced fluid separation properties compared to filter media that do not include such modified layers or configuration of layers, all other factors being equal. The filter media may be well-suited for a variety of applications, including filtering fuel, air, and lube oil.
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Citations
22 Claims
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1. A filter media comprising:
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a non-woven web, comprising; a first layer having a hydrophobic surface, wherein the first layer has a basis weight between 0.1 g/m2 and 100 g/m2, a thickness between 0.05 mm and 3 mm, and an air permeability between 0.3 CFM and 800 CFM; a second layer having a hydrophobic surface, wherein the second layer has a basis weight between 0.1 g/m2 and 100 g/m2, a thickness between 0.05 mm and 3 mm, and an air permeability between 0.3 CFM and 800 CFM, and wherein the air permeability of the second layer is different from an air permeability of the first layer; and a third layer, where a surface of the third layer is coated with a hydrophilic material, wherein the third layer has a basis weight between 0.1 g/m2 and 100 g/m2, a thickness between 0.05 mm and 3 mm, and an air permeability between 0.3 CFM and 800 CFM. - View Dependent Claims (5, 6, 9)
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2. A filter media comprising:
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a non-woven web, comprising; a first layer having a hydrophilic surface, wherein the first layer has a basis weight between 0.1 g/m2 and 100 g/m2, a thickness between 0.05 mm and 3 mm, and an air permeability between 0.3 CFM and 800 CFM; a second layer having a hydrophilic surface, wherein the second layer has a basis weight between 0.1 g/m2 and 100 g/m2, a thickness between 0.05 mm and 3 mm, and an air permeability between 0.3 CFM and 800 CFM, wherein a surface of at least one of the first and second layers is coated with a hydrophilic material, and wherein the air permeability of the second layer is different from the air permeability of the first layer; and a third layer having a hydrophobic surface, wherein the third layer has a basis weight between 0.1 g/m2 and 100 g/m2, a thickness between 0.05 mm and 3 mm, and an air permeability between 0.3 CFM and 800 CFM. - View Dependent Claims (3, 4, 7, 8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification