FILTER MEDIA INCLUDING A FILTRATION LAYER COMPRISING SYNTHETIC FIBERS

• US 20190321760A1
• Filed: 02/21/2019
• Published: 10/24/2019
• Est. Priority Date: 02/17/2016
• Status: Active Grant

• Current Assignee: Hollingsworth & Vose Company
• Original Assignee: Hollingsworth & Vose Company
• Inventors: Anantharamaiah, Nagendra, Jaganathan, Sudhakar, Gadbois, Gerald, Silin, Maxim, Gallimore, Mark A.
• Granted Patent: US 11,123,668 B2
• Time in Patent Office: Days
• CPC Class Codes: B01D 2239/0636 Two or more types of fibres present in the filter material
• CPC Class Codes: B01D 2239/065 More than one layer present in the filtering material apparatus incorporating such gas filtering material B01D2275/10
• CPC Class Codes: B01D 2239/1233 Fibre diameter
• CPC Class Codes: B01D 2239/1291 Other parameters
• CPC Class Codes: B01D 39/1623 of synthetic origin
• CPC Class Codes: B01D 39/163 sintered or bonded
• CPC Class Codes: D04H 1/435 Polyesters
• CPC Class Codes: D04H 1/4382 Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
• CPC Class Codes: D04H 1/43835 Mixed fibres, e.g. at least two chemically different fibres or fibre blends
• CPC Class Codes: D04H 1/43838 Ultrafine fibres, e.g. microfibres
• CPC Class Codes: D04H 1/58 by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives in combination with needling D04H1/488
• CPC Class Codes: D04H 1/732 by fluid current, e.g. air-lay

Abstract

Filter media comprising a filtration layer comprising synthetic fibers (e.g., pleatable backer layer) and related components, systems, and methods associated herewith are provided. In some embodiments, the filtration layer comprising synthetic fibers may be a non-woven web comprising a blend of coarse and fine diameter fibers. The filtration layer comprising synthetic fibers may be designed to have desirable performance properties without compromising certain mechanical properties, such as the pleatability of the media. In some embodiments, a filter media, described herein, may comprise the filtration layer comprising synthetic fibers and an efficiency layer. Filter media, as described herein, may be particularly well-suited for applications that involve filtering air, though the media may also be used in other applications.

Claims

1. A filter media, comprising:

a non-woven web comprising;

first synthetic fibers having an average fiber diameter of greater than or equal to about 15 microns, wherein the weight percentage of first synthetic fibers of all fibers in the non-woven web is greater than or equal to about 40 wt. %; and

second synthetic fibers having an average fiber diameter of greater than or equal to about 0.5 microns and less than about 15 microns, wherein the weight percentage of second synthetic fibers of all fibers in the non-woven web is less than or equal to about 50 wt. %, and wherein the surface average fiber diameter of the non-woven web is greater than or equal to about 13 microns and less than or equal to about 17 microns and is measured using the formula;