FLUOROPOLYMER FINE FIBER
First Claim
1. A fine fiber layer comprising a fine fiber, the fine fiber comprising a fluoropolymer comprising a fine fiber diameter of about 0.1 microns to about 10 microns, the fine fiber layer comprising a thickness of about 0.2 microns to about 30 microns and a basis weight of about 0.01 grams per square meter to about 10 grams per square meter.
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Accused Products
Abstract
A layer of fluoropolymer fine fiber can be made. The fine fiber can be made by electrospinning from a solvent or a solvent blend. The layers of the invention are useful in general filtration of fluid streams including gaseous and liquid streams. The fine fiber layers are also useful as hydrophobic filtration layers that can be used to separate water from a hydrocarbon stream.
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Citations
126 Claims
- 1. A fine fiber layer comprising a fine fiber, the fine fiber comprising a fluoropolymer comprising a fine fiber diameter of about 0.1 microns to about 10 microns, the fine fiber layer comprising a thickness of about 0.2 microns to about 30 microns and a basis weight of about 0.01 grams per square meter to about 10 grams per square meter.
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77. A fine fiber layer, comprising a fine fiber comprising a fluoropolymer, the fine fiber comprising a diameter of about 0.1 microns to about 1 micron, the fine fiber layer comprising a thickness of about 0.3 microns to about 5 microns when the fine fiber layer is viewed at an angle 90°
- from the angle of fiber deposition, a basis weight of about 0.1 grams per square meter to about 2 grams per square meter, and air permeability of about 0.1 m3/min/m2 to 1.0 m3/min/m2.
- View Dependent Claims (78, 79, 80, 81)
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82. A method of separating water from fuel, the method comprising the steps of
(a) contacting a hydrocarbon liquid, the hydrocarbon liquid comprising a water impurity, with a separator layer comprising: -
(i) a fine fiber layer comprising a fine fiber, the fine fiber comprising a fluoropolymer comprising a fiber diameter of about 0.1 microns to about 10 microns, the fine fiber layer comprising a thickness of about 0.2 microns to about 30 microns and a basis weight of about 0.01 grams per square meter to about 10 grams per square meter, and (ii) a substrate comprising cellulose, glass fibers, polyester, nylon, a fuel filtration medium, or a blend thereof; (b) forming a separated aqueous phase from the hydrocarbon liquid phase wherein the separated aqueous phase comprises the water impurity; and (c) removing the aqueous phase from the hydrocarbon liquid phase. - View Dependent Claims (83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115)
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- 116. A method of forming a fine fiber layer, the fiber comprising a fluoropolymer, the method comprising electrospinning the fluoropolymer from an electrospinning solution.
Specification