Abstract: An object is to provide an electromagnetic wave absorber that has excellent performance in absorbing high-frequency electromagnetic waves of 60 GHz to 120 GHz incident thereon, and further has flexibility and can be installed on various curved surfaces. Conventional problems have been made solvable by an electromagnetic wave absorber that is a structure formed by folding a sheet 1 into the form of pleats, the sheet containing a conductive material and having a surface resistance of 10 ?/? to 104 ?/?, in which slits 2 are perforated non-parallel to a folded ridgeline R.

Abstract: The present invention provides a nonwoven fabric for a separation membrane which can prevent a bleed-through of a resin solution used for coating in a step of producing the separation membrane, can produce a separation membrane having a large permeate flux of a liquid by non-solvent induced phase separation, has high adhesiveness between a coating membrane and the nonwoven fabric, and can make the coating membrane thin, and a method of producing the same. In an exemplary aspect of the present invention, a two-layer nonwoven fabric 10 for a separation membrane is configured to have a surface layer 11 and a back surface layer 12, a coating surface of a coating solution during membrane formation is a surface 11a of the surface layer 11, and, when the nonwoven fabric 10 is impregnated with the coating solution for membrane formation, the surface layer 11 has a large Laplace force and the back surface layer 12 has a small Laplace force.

Abstract: Disclosed is a sheet which comprises a fibrous substrate and carbon nanotubes attached to fibers constituting the fibrous substrate. The carbon nanotubes in the sheet comprise single-walled carbon nanotubes as a main component.