公开(公告)号：US20220054964A1

公开(公告)日：2022-02-24

申请号：US17408131

申请日：2021-08-20

Applicant: Ascend Performance Materials Operations LLC

Inventor： Vikram GOPAL ,  Natasha DEAN ,  Albert ORTEGA ,  Wai-shing YUNG ,  Ping HAO

IPC: B01D46/00 ,  B01D39/16

Abstract: Provided herein are filter media structures having antimicrobial and/or antiviral properties. In particular, the present disclosure describes filter media structures having a first layer with an electret web and a second layer that demonstrates biological-reducing properties. In some cases, the first layer is formed from polypropylene (e.g., spunbond) and the second layer is formed from a plurality of fibers of a polyamide composition (e.g., meltblown).

公开(公告)号：US20210322908A1

公开(公告)日：2021-10-21

申请号：US17235345

申请日：2021-04-20

Applicant: Ascend Performance Materials Operations LLC

Inventor： Vikram GOPAL ,  Wai-shing YUNG ,  Natasha DEAN ,  Albert ORTEGA

IPC: B01D39/16 ,  A41D13/11 ,  B32B5/02 ,  B32B5/26 ,  A62B7/10 ,  A62B23/02

Abstract: A filter or mask structure, comprising a first face layer comprising a polymer and having a face basis weight, a second outer layer comprising a polymer and having an outer basis weight less than 34 gsm, and a third outer layer comprising a polymer and having a third basis weight and disposed between the first face layer and the second outer layer. At least one of the layers further comprises an AM/AV compound. The mask structure demonstrates an Escherichia coli efficacy log reduction greater than 4.0, as measured in accordance with ASTM E3160 (2018) and a particulate filtration efficiency greater than 90%, as measured in accordance with ASTM F2299-03R17.