CPC B32B 3/263 (2013.01) [B32B 5/02 (2013.01); D01D 5/04 (2013.01); D04H 1/4374 (2013.01); D04H 1/728 (2013.01); B32B 2262/02 (2013.01); B32B 2307/732 (2013.01)] | 17 Claims |
1. A nanofiber sheet comprising:
a substrate layer; and
a nanofiber layer located on one surface side of the substrate layer and containing nanofibers of a polymer compound, wherein:
a peripheral edge of the nanofiber layer has a thickness of from 0.1 to 10 μm;
the nanofiber layer includes at least 3 mm of a gradation region having a thickness that gradually increases inward from the peripheral edge;
the nanofiber layer is located adjacent to the substrate layer; and
the substrate layer has, on a surface facing the nanofiber laver, a plurality of depressions or projections each having a width greater than a fiber diameter of the nanofiber.
|