公开(公告)号：US20240238709A1

公开(公告)日：2024-07-18

申请号：US18620438

申请日：2024-03-28

Applicant: YAMASHIN-FILTER CORP.

Inventor： Shoji HIROTA ,  Koki AIDA ,  Tatsuhiro OSHITA ,  Shinichi TAOGUCHI

IPC: B01D39/16 ,  B01D46/52 ,  B01D46/54 ,  B01D46/62

CPC classification number: B01D39/1623 ,  B01D46/521 ,  B01D46/546 ,  B01D46/62 ,  B01D2239/025 ,  B01D2239/0618 ,  B01D2239/0654 ,  B01D2239/1233 ,  B01D2239/1258 ,  B01D2239/1291

Abstract: Damage is not caused even when oil mist in a gas is trapped, and clogging of a filter paper due to an oil film can be less likely to occur. A filtration member formed by folding a filter paper for trapping oil mist in a gas into a corrugated shape in which mountain folds and valley folds are alternately repeated is provided. The filter paper includes a nanofiber layer formed of polyolefin fibers. In the nanofiber layer, a content of fibers having a fiber diameter of 0.2 μm to 0.4 μm is 3% or more, a content of fibers having a fiber diameter of 0.4 μm to 0.6 μm is 24% or more, a content of fibers having a fiber diameter of 0.6 μm to 0.8 μm is 15% or more, and a content of fibers having a fiber diameter of 0.8 μm to 1.0 μm is 9% or more.