公开(公告)号：US20220403571A1

公开(公告)日：2022-12-22

申请号：US17894353

申请日：2022-08-24

Applicant: FUJIFILM Corporation

Inventor： Kenichi UMEMORI ,  Shunichi YOSHIDA

IPC: D04H1/728 ,  D04H1/425 ,  D01D5/00 ,  D01F2/00

Abstract: A nonwoven fabric manufacturing facility includes a fiber assembly manufacturing step and a heating and drawing step. In the fiber assembly manufacturing step, fibers formed using an electrospinning method are collected to form a fiber assembly. In the heating and drawing step, the fiber assembly is drawn to form nonwoven fabric in a state where the fiber assembly is heated to a melting point of the fibers. In the formed nonwoven fabric, an average pore diameter is 15 μm or more, a relative standard deviation of a pore diameter distribution is 0.1 or less, and an average fiber diameter of the fibers is 3 μm or less.