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1. WO2022009028 - PLEATED FILTRATION ASSEMBLY COMPRISING SPUNBONDED PREFILTER

Publication Number WO/2022/009028
Publication Date 13.01.2022
International Application No. PCT/IB2021/055876
International Filing Date 30.06.2021
IPC
B01D 46/52 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
46Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
52Particle separators, e.g. dust precipitators, using filters embodying folded material
B01D 39/16 2006.1
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
B01D 46/00 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
46Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
CPC
B01D 2239/0233
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
0216Bicomponent or multicomponent fibres
0233Island-in-sea
B01D 2239/0407
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2239Aspects relating to filtering material for liquid or gaseous fluids
04Additives and treatments of the filtering material
0407comprising particulate additives, e.g. adsorbents
B01D 2239/0421
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2239Aspects relating to filtering material for liquid or gaseous fluids
04Additives and treatments of the filtering material
0414Surface modifiers, e.g. comprising ion exchange groups
0421Rendering the filter material hydrophilic
B01D 2239/0435
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2239Aspects relating to filtering material for liquid or gaseous fluids
04Additives and treatments of the filtering material
0435Electret
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 2239/0627
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
0627Spun-bonded
Applicants
  • 3M INNOVATIVE PROPERTIES COMPANY [US]/[US]
Inventors
  • JASUJA, Himanshu
  • SCHULTZ, Nathan E.
  • KIRK, Seth M.
  • GERHARDT, Bryan L.
  • DUAN, Daniel C.
  • BERRIGAN, Michael R.
Agents
  • WOOD, Kenneth B.
  • BLANK, Colene H.,
  • EHRICH, Dena M.
  • GEISE, C. Michael,
  • LEVINSON, Eric D.,
  • NOWAK, Sandra K.,
Priority Data
63/049,50608.07.2020US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) PLEATED FILTRATION ASSEMBLY COMPRISING SPUNBONDED PREFILTER
(FR) ENSEMBLE DE FILTRATION PLISSÉ COMPRENANT UN PRÉFILTRE FILÉ-LIÉ
Abstract
(EN) A pleated multilayer air filter assembly including a primary filtration layer and a prefilter layer that are bonded to each other and are co-pleated with each other. The primary filtration layer includes meltblown electret fibers. The prefilter layer includes meltspun, spunbonded electret fibers that comprise a radially outer surface comprising polymethylpentene. The ratio of Effective Fiber Diameter of the fibers of the primary filtration layer to Effective Fiber Diameter of the fibers of the primary filtration layer is at least 1.5.
(FR) Ensemble filtre à air multicouche plissé comprenant une couche de filtration primaire et une couche de préfiltre qui sont liées l'une à l'autre et sont co-plissées l'une à l'autre. La couche de filtration primaire comprend des fibres d'électret obtenues par fusion-soufflage. La couche de pré-filtre comprend des fibres d'électret filées par fusion, filées-liées qui comprennent une surface radialement externe comprenant du polyméthylpentène. Le rapport entre le diamètre de fibre efficace des fibres de la couche de filtration primaire et le diamètre de fibre efficace des fibres de la couche de filtration primaire est d'au moins 1,5.
Latest bibliographic data on file with the International Bureau