Filter bags comprising a porous membrane

Patent metadata

Field	Value
Publication number	US-10994237-B2
Application number	US-202015930181-A
Country	US
Kind code	B2
Filing date	May 12, 2020
Priority date	Nov 13, 2017
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

A filter bag is disclosed that comprises a porous membrane having a strength in the transverse direction to improve durability. There is a filter assembly for filtering particulates from a gas stream comprising a support substructure and a filter bag at least partially surrounding the support substructure. The filter bag comprises a porous membrane having a upstream surface exposed to the gas stream. The porous membrane is lightweight and has a structure to collect the particulates on the upstream surface. In particular, the porous membrane has a bubble point of 0.06 MPa or more and has a strength in a transverse direction that is 100 N/m or more. Other filter bags disclosed comprise a laminate comprising a porous membrane having a bubble point of 0.06 MPa or more and a second layer that acts as a sacrificial material.

First claim

What is claimed is:

1. A filter assembly comprising:
a filter bag comprising:
a filter media;
a porous membrane,
wherein the porous membrane includes an upstream surface configured to be exposed to a gas stream,
wherein the porous membrane has a bubble point of 0.06 MPa or more, and

a second layer,
wherein the second layer is disposed between the filter media and the porous membrane,
wherein the filter bag is cleanable and durable, and

wherein the filter assembly is configured to filter particulates from the gas stream, and wherein the second layer comprises a membrane with a bubble point of 0.2 MPa and a transverse strength of 127 N/m.

Assignees

• Gore & Ass

Inventors

• Spiegel Rebecca

Classifications

• Y02A50/2351

  Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust · CPC title

• B01D46/72

  with backwash arms, shoes or nozzles · CPC title

• B01D46/71

  with pressurised gas, e.g. pulsed air · CPC title

• B01J20/28035

  with more than one layer, e.g. laminates, separated sheets · CPC title

• B01D2239/0618

  Non-woven · CPC title