公开(公告)号：WO2021127177A1

公开(公告)日：2021-06-24

申请号：PCT/US2020/065610

申请日：2020-12-17

Applicant: HOLLINGSWORTH & VOSE COMPANY

Inventor： HEALEY, David T. ,  SMITH, Bruce ,  LEARY, Jennifer Dana ,  FARELL, Greg Wagner

IPC: A41D13/11 ,  B01D39/16 ,  B01D46/00 ,  B01D2239/0618 ,  B01D2239/0681 ,  B01D2239/1233 ,  B01D39/163 ,  B32B5/02 ,  D04H1/435 ,  D04H1/4374 ,  D04H1/43825 ,  D04H1/43835 ,  D04H1/43918 ,  D04H1/56 ,  D04H1/58 ,  D04H1/728 ,  D04H1/732

Abstract: Filter media comprising a non-wetlaid backer are generally provided. In some embodiments, a filter media comprises a non-wetlaid fiber web and further comprises one or more further fiber webs. The further fiber web(s) may include an efficiency layer and/or a prefilter.