Processing

Please wait...

Settings

Settings

Goto Application

1. WO2020223638 - FILTER MEDIA COMPRISING POLYAMIDE NANOFIBER LAYER

Publication Number WO/2020/223638
Publication Date 05.11.2020
International Application No. PCT/US2020/031038
International Filing Date 01.05.2020
IPC
B01D 39/16 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
39Filtering material for liquid or gaseous fluids
14Other self-supporting filtering material
16of organic material, e.g. synthetic fibres
CPC
B01D 2239/025
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2239Aspects relating to filtering material for liquid or gaseous fluids
02Types of fibres, filaments or particles, self-supporting or supported materials
025comprising nanofibres
B01D 2239/0622
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2239Aspects relating to filtering material for liquid or gaseous fluids
06Filter cloth, e.g. knitted, woven non-woven; self-supported material
0604Arrangement of the fibres in the filtering material
0622Melt-blown
B01D 2239/065
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2239Aspects relating to filtering material for liquid or gaseous fluids
06Filter cloth, e.g. knitted, woven non-woven; self-supported material
065More than one layer present in the filtering material
B01D 2239/0654
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2239Aspects relating to filtering material for liquid or gaseous fluids
06Filter cloth, e.g. knitted, woven non-woven; self-supported material
065More than one layer present in the filtering material
0654Support layers
B01D 2239/1233
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2239Aspects relating to filtering material for liquid or gaseous fluids
12Special parameters characterising the filtering material
1233Fibre diameter
B01D 2239/1258
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2239Aspects relating to filtering material for liquid or gaseous fluids
12Special parameters characterising the filtering material
1258Permeability
Applicants
  • ASCEND PERFORMANCE MATERIALS OPERATIONS LLC [US]/[US]
Inventors
  • YUNG, Wai-Shing
  • OSBORN, Scott E.
  • MENNER, Joseph L.
  • ORTEGA, Albert E.
Agents
  • FREDLAKE, Keith DS
  • GENDZWILL, Jeffrey
Priority Data
62/841,48501.05.2019US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) FILTER MEDIA COMPRISING POLYAMIDE NANOFIBER LAYER
(FR) MILIEU FILTRANT COMPRENANT UNE COUCHE DE NANOFIBRES DE POLYAMIDE
Abstract
(EN)
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.
(FR)
L'invention concerne un milieu filtrant comprenant une couche de nanofibres de polyamide. Le polyamide peut avoir une Viscosité Relative de 2 à 200 . La couche de nanofibres de polyamide peut avoir un point de fusion de 225C ou plus. Les nanofibres peuvent avoir un diamètre de fibre moyen inférieur à 1000 nanomètres (1 micron). L'invention concerne également des procédés pour préparer le milieu filtrant. En général, le procédé comprend les étapes suivantes : (a) la fourniture d'une composition de polymère de polyamide filable, le polyamide ayant une Viscosité Relative de 2 à 200 ; (b) le filage à l'état fondu de la composition de polymère de polyamide en une pluralité de nanofibres ayant un diamètre moyen de fibre inférieur à 1 micron, suivi de (c) la formation de la couche de nanofibres de polyamide.
Latest bibliographic data on file with the International Bureau