公开(公告)号：US11679578B2

公开(公告)日：2023-06-20

申请号：US17296881

申请日：2019-11-25

Applicant: Kao Corporation

Inventor： Suguru Ikeyama ,  Hideo Kobayashi ,  Takehiko Tojo ,  Koji Saito ,  Yuting Yang ,  Shunetsu Yonaiyama ,  Ikuo Fukuda

IPC: B32B3/26 ,  B32B5/02 ,  D01D5/04 ,  D04H1/4374 ,  D04H1/728

CPC classification number: B32B3/263 ,  B32B5/02 ,  D01D5/04 ,  D04H1/4374 ,  D04H1/728 ,  B32B2262/02 ,  B32B2307/732

Abstract: A nanofiber sheet includes: a substrate layer; and a nanofiber layer located on one surface side of the substrate layer and containing nanofibers of a polymer compound. A peripheral edge of the nanofiber layer has a thickness of from 0.1 to 10 μm. The nanofiber layer includes a gradation region having a thickness that gradually increases inward from the peripheral edge. The distance W1 between the peripheral edge of the nanofiber layer and a maximum thickness portion where the thickness becomes the greatest in the gradation region is at least 3 mm. A nanofiber sheet manufacturing method involves depositing nanofibers onto a collecting unit by moving at least either a nozzle or the collecting unit, to thereby manufacture a predetermined nanofiber sheet including a gradation region.