Patent ID: 8978899
Filing Date: 2015-03-17
Classification: B01D,D01D,D01F,D04H,D06M,Y10T

Abstract:
1. A fine fiber layer comprising a fine fiber, the fine fiber comprising a fluoropolymer comprising; a polymer comprising tetrafluoroethylene and hexafluoropropylene; a polymer comprising tetrafluoroethylene and a perfluorovinyl ether; a polymer comprising hexafluoropropylene, tetrafluoroethylene, and ethylene; a polymer comprising vinylidene fluoride, trifluoroethylene, and tetrafluoroethylene; or a polymer comprising a fluorinated acrylic monomer, wherein the fluorinated acrylic monomer is a fluorinated acrylate or methacrylate; the fine fiber comprising a fine fiber diameter of about 0.1 microns to 0.5 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 less than 10 grams per square meter.