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1. WO2022162278 - A FILTER MEDIA AND A PROCESS FOR PRODUCING THE SAME

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Publication Number WO/2022/162278
Publication Date 04.08.2022
International Application No. PCT/FI2022/050056
International Filing Date 28.01.2022
IPC
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 39/18 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
18the material being cellulose or derivatives thereof
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 2239/0636
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
0636Two or more types of fibres present in the filter material
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 2239/0663
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
0663The layers being joined by hydro-entangling
B01D 2239/086
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2239Aspects relating to filtering material for liquid or gaseous fluids
08Special characteristics of binders
086Binders between particles or fibres
B01D 2239/10
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2239Aspects relating to filtering material for liquid or gaseous fluids
10Filtering material manufacturing
Applicants
  • AHLSTROM-MUNKSJÖ OYJ [FI]/[FI]
Inventors
  • LADWIG, Jeffrey
  • TOPOLENSKI, David
  • WILLIAMSON, Kent
  • GOODBY, Andrew
  • HADY, Mike
  • SHANNON, Steven
Agents
  • LAINE IP OY
Priority Data
63/143,51729.01.2021US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) A FILTER MEDIA AND A PROCESS FOR PRODUCING THE SAME
(FR) MILIEU FILTRANT ET SON PROCÉDÉ DE PRODUCTION
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Abstract
(EN) It is described herein a filter media comprising at least a first layer comprising first fibers and a second layer comprising second fibers. The first fibers may comprise synthetic fibers in an amount of at least 50 wt.% based on total weight of the fibers in the first layer. The second fibers may comprise cellulosic fibers in an amount of at least 30 wt.% based on total weight of the fibers in the second layer. The first layer may be joined to the second layer with an interface between the first layer and the second layer comprising a mixture of the first fibers and the second fibers such that a z-directional tensile strength (zdt) across the first layer and the second layer – in the absence of a secondary adhesive – is at least 0.5 psi. It is also described herein a process to produce such a filter media, and a filter element comprising such a filter media.
(FR) Un milieu filtrant est décrit dans la présente invention, comprenant au moins une première couche comprenant des premières fibres et une seconde couche comprenant des secondes fibres. Les premières fibres peuvent comprendre des fibres synthétiques en une quantité d'au moins 50 % en poids sur la base du poids total des fibres dans la première couche. Les secondes fibres peuvent comprendre des fibres cellulosiques en une quantité d'au moins 30 % en poids sur la base du poids total des fibres dans la seconde couche. La première couche peut être jointe à la seconde couche avec une interface entre la première couche et la seconde couche comprenant un mélange des premières fibres et des secondes fibres de sorte qu'une résistance à la traction dans la direction z (zdt) à travers la première couche et la seconde couche, en l'absence d'un adhésif secondaire, soit d'au moins 0,5 psi. Un procédé de production d'un tel milieu filtrant, et un élément filtrant comprenant un tel milieu filtrant sont également décrits dans la présente invention.
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