EP 3962626 A1 20220309 - FILTER MEDIA COMPRISING POLYAMIDE NANOFIBER LAYER
Title (en)
FILTER MEDIA COMPRISING POLYAMIDE NANOFIBER LAYER
Title (de)
FILTERMEDIUM MIT POLYAMID-NANOFASERSCHICHT
Title (fr)
MILIEU FILTRANT COMPRENANT UNE COUCHE DE NANOFIBRES DE POLYAMIDE
Publication
Application
Priority
- US 201962841485 P 20190501
- US 2020031038 W 20200501
Abstract (en)
[origin: WO2020223638A1] Filter media comprising a polyamide nanofiber layer is disclosed. The polyamide may have a Relative Viscosity from 2 to 200. The polyamide nanofiber layer may have a melt point of 225C or greater. The nanofibers may have an average fiber diameter of less than 1000 nanometers (1 micron). Methods for preparing the filter media are also disclosed. In general, the method includes: (a) providing a spinnable polyamide polymer composition, wherein the polyamide has a Relative Viscosity from 2 to 200; (b) melt spinning the polyamide polymer composition into a plurality of nanofibers having an average fiber diameter of less than 1 micron, followed by (c) forming the polyamide nanofiber layer.
IPC 8 full level
B01D 39/16 (2006.01)
CPC (source: EP KR)
B01D 39/1623 (2013.01 - EP KR); B01D 2239/025 (2013.01 - EP KR); B01D 2239/0622 (2013.01 - EP KR); B01D 2239/065 (2013.01 - EP KR); B01D 2239/0654 (2013.01 - EP KR); B01D 2239/1233 (2013.01 - EP KR); B01D 2239/1258 (2013.01 - EP KR)
Citation (search report)
See references of WO 2020223638A1
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 2020223638 A1 20201105; BR 112021020488 A2 20220215; CA 3138150 A1 20201105; CA 3138150 C 20230919; CN 113710344 A 20211126; EP 3962626 A1 20220309; JP 2022530806 A 20220701; JP 7340037 B2 20230906; KR 20210153137 A 20211216; MX 2021013375 A 20211125; TW 202110520 A 20210316; TW I758722 B 20220321
DOCDB simple family (application)
US 2020031038 W 20200501; BR 112021020488 A 20200501; CA 3138150 A 20200501; CN 202080027843 A 20200501; EP 20727779 A 20200501; JP 2021564444 A 20200501; KR 20217039357 A 20200501; MX 2021013375 A 20200501; TW 109114723 A 20200501