Method of making hydrophilic fluoropolymer material
AssigneeToray Fluorofibers (America), Inc.
InventorsJ. Michael Donckers, II, Arthur Russell Nelson, Chester Darryl Moon
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Abstract
A fluoropolymer material exhibiting an increased hydrophilicity prepared by processing the material in a cryogenic grinding mill.
Claims37
A method for increasing the hydrophilicity of fluoropolymer fibers comprising cooling the fluoropolymer fibers, followed by mechanically modifying the fluoropolymer fibers wherein the mechanically modifying includes forming a split in an end of at least one of the fluoropolymer fibers, the split having a length that is equal to between 2% and 100% of a length of the at least one fluoropolymer fiber.
A method for increasing the hydrophilicity of fluoropolymer fibers comprising cooling the fluoropolymer fibers, followed by mechanically modifying the fluoropolymer fibers wherein the mechanically modifying includes forming a slit in at least one of the fluoropolymer fibers, the slit having a depth that is greater than 1.0 micron.
A method for increasing the hydrophilicity of fluoropolymer fibers comprising cooling the fluoropolymer fibers, followed by mechanically modifying the fluoropolymer fibers wherein the cooling includes lowering a temperature of the fluoropolymer fibers to about −268° C. or less.
Dependencies are inferred from the claim text.