EP 3585499 A1 20200101 - ELECTRET-CONTAINING FILTER MEDIA
Title (en)
ELECTRET-CONTAINING FILTER MEDIA
Title (de)
ELEKTRETHALTIGE FILTERMEDIEN
Title (fr)
MILIEU FILTRANT CONTENANT UN ÉLECTRET
Publication
Application
Priority
- US 201715438028 A 20170221
- US 201715438042 A 20170221
- US 201715790651 A 20171023
- US 2018018924 W 20180221
Abstract (en)
[origin: WO2018156561A1] Filter media, such as electret-containing filtration media for filtering gas streams (e.g., air), are described herein. In some embodiments, the filter media may be designed to have desirable properties such as stable filtration efficiency over the lifetime of the filter media, increased normalized gamma, relatively low pressure drop (i.e. resistance), and/or relatively low basis weight. In certain embodiments, the filter media may be a composite of two or more types of fiber layers where each layer may be designed to enhance its function without substantially negatively impacting the performance of another layer of the media. For example, one layer of the media may be designed to have a relatively low basis weight and/or a relatively high air permeability, and another layer of the media may be designed to have stable filtration efficiency and/or a relatively high efficiency throughout the filter media's lifetime.
IPC 8 full level
B01D 39/16 (2006.01); B01D 46/00 (2006.01)
CPC (source: EP)
B01D 39/1623 (2013.01); B01D 2239/0435 (2013.01); B01D 2239/064 (2013.01); B01D 2239/0654 (2013.01); B01D 2239/1258 (2013.01)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2018156561 A1 20180830; CN 110545894 A 20191206; CN 110545894 B 20221028; CN 115646068 A 20230131; EP 3585499 A1 20200101; EP 3585499 A4 20201223
DOCDB simple family (application)
US 2018018924 W 20180221; CN 201880025705 A 20180221; CN 202211237409 A 20180221; EP 18757748 A 20180221