Filter media construction with nanofiber and carbon web

Patent metadata

Field	Value
Publication number	US-9849415-B2
Application number	US-201514800485-A
Country	US
Kind code	B2
Filing date	Jul 15, 2015
Priority date	Jul 22, 2009
Publication date	Dec 26, 2017
Grant date	Dec 26, 2017

Abstract

Disclosed herein, among other things, is an improved filter media construction that comprises multiple layers for improved odor control that can be used for vacuum cleaner air filtration cartridge applications. The filter media comprises anti-microbial ePTFE HEPA filter media to prevent mold growth. The filter media may also be used for air cleaner filtration, central air filtration for home and industrial buildings (HVAC), cleanrooms, and microelectronic devices. In an embodiment, the improved filter media construction comprises at least a PTFE layer, a bi-component layer, and a base layer. In an embodiment the PTFE layer comprises ePTFE. In an embodiment, the bi-component layer comprises non-woven polyethylene/polyethylene terephthalate (PE/PET). In yet another embodiment, the base layer comprises activated carbon. Other aspects and embodiments are provided herein.

First claim

What is claimed is:

1. A multi-layer filter media construction comprising:
an upstream media layer comprising nanofiber,
a bi-component layer comprising non-woven polyethylene/polyethylene terephthalate, and
a base layer, wherein the upstream media layer is bonded to the base layer by the bi-component layer.

2. The filter media construction of claim 1 , the base layer comprising activated carbon.

3. The filter media construction of claim 2 wherein the base layer comprises a minimum of 45% activated carbon.

4. The filter media construction of claim 2 , the base layer further comprising nanofiber.

5. The filter media construction of claim 1 , the base layer comprising carbon loaded melt-blown media.

6. The filter media construction of claim 5 , the base layer further comprising nanofiber.

7. A method for making a three-layer filter media construction comprising:
bonding an upstream media layer to a base layer using a bi-component layer under heat and pressure, wherein the upstream media layer comprises nanofiber and wherein the bi-component layer comprising non-woven polyethylene/polyethylene terephthalate.

8. The method of claim 7 , the base layer comprising activated carbon.

9. The method of claim 8 , wherein the base layer comprises a minimum of 45% activated carbon.

10. The method of claim 8 , wherein the base layer further comprises nanofiber.

11. The method of claim 7 , the base layer comprising carbon loaded melt-blown media.

12. The method of claim 11 , the base layer further comprising nanofiber.

13. A multi-layer filter media construction comprising:
an upstream media layer comprising nanofiber,
a bi-component layer comprising non-woven polyethylene/polyethylene terephthalate, and
a base layer comprising carbon loaded nanofiber.

14. The filter media construction of claim 13 , wherein the base layer comprises a minimum of 45% activated carbon.

15. The filter media construction of claim 13 , wherein the filter media construction further comprises an anti-microbial treatment.

Assignees

• Donaldson Co Inc

Inventors

• Patel Kirit

Classifications

• B01D46/0028

  provided with antibacterial or antifungal means · CPC title

• B01D39/16

  of organic material, e.g. synthetic fibres · CPC title

• B01D46/0036

  by adsorption or absorption · CPC title

• B01D46/0001

  Making filtering elements · CPC title

• Y10T156/10

  Methods of surface bonding and/or assembly therefor · CPC title