EP 3487602 A4 20200115 - MULTI-LAYERED ELECTRET-CONTAINING FILTRATION MEDIA

Title (en)

MULTI-LAYERED ELECTRET-CONTAINING FILTRATION MEDIA

Title (de)

FILTERMEDIEN MIT MEHRSCHICHTIGEM ELECTRET

Title (fr)

MILIEUX DE FILTRATION MULTICOUCHES CONTENANT DES ÉLECTRETS

Publication

EP 3487602 A4 20200115 (EN)

Application

EP 17831940 A 20170721

Priority

US 201615217718 A 20160722
US 2017043249 W 20170721

Abstract (en)

[origin: WO2018017937A1] Filter 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, high oil repellency, low instantaneous resistance, and/or stable service life. In certain embodiments, one or more layers of the media may have a certain value of basis weight over air permeability (and/or a ratio of a value of basis weight over air permeability between two layers). The filter media may optionally comprise a support layer with a relatively high air permeability (e.g., greater than or equal to 1100 CFM). In some cases, the filter media may have a relatively low initial resistance and/or may have a particular final El efficiency. The filter media described herein may be particularly well-suited for applications that involve filtering gas streams (e.g., face masks, cabin air filtration, vacuum filtration, respirator equipment, as well as residential heating ventilation and air conditioning (HVAC) and industrial HVAC systems), though the media may also be used in other applications.

IPC 8 full level

B01D 39/18 (2006.01); B01D 39/16 (2006.01)

CPC (source: EP)

B01D 39/1623 (2013.01); B01D 2239/0435 (2013.01); B01D 2239/0659 (2013.01); B01D 2239/1258 (2013.01)

Citation (search report)

[XI] US 2015121823 A1 20150507 - HEALEY DAVID T [US]
[I] US 5672188 A 19970930 - CHOI KYUNG-JU [US]
See also references of WO 2018017937A1

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

DOCDB simple family (publication)

WO 2018017937 A1 20180125; CN 109475798 A 20190315; EP 3487602 A1 20190529; EP 3487602 A4 20200115

DOCDB simple family (application)

US 2017043249 W 20170721; CN 201780044830 A 20170721; EP 17831940 A 20170721