Patent ID: 8394549

Claim:
A nonwoven fabric, comprising: fibers of an ethylene/tetrafluoroethylene copolymer; wherein the ethylene/tetrafluoroethylene copolymer comprises repeating units based on a monomer represented by CH 2 =CX(CF 2 ) n Y wherein each of X and Y is a hydrogen atom or a fluorine atom, and n is an integer of from 2 to 8, and a content of the repeating units based on the monomer is from 0.1 to 7 mol % based on the total repeating units of the ethylene/tetrafluoroethylene copolymer; a storage elastic modulus E′ at 25° C. of the ethylene/tetrafluoroethylene copolymer of the fiber is at least 8×108 Pa; a melt viscosity of the ethylene/tetrafluoroethylene copolymer of the fiber, measured at 300° C., is higher than 60 Pas and at most 300 Pas; and an average fiber diameter of the ethylene/tetrafluoroethylene copolymer fibers is from 0.01 to 3 μm.