Web comprising fine fiber and reactive, adsorptive or absorptive particulate

Patent metadata

Field	Value
Publication number	US-10058807-B2
Application number	US-201715432047-A
Country	US
Kind code	B2
Filing date	Feb 14, 2017
Priority date	Feb 13, 2006
Publication date	Aug 28, 2018
Grant date	Aug 28, 2018

Abstract

The assemblies of the invention can comprise a fine fiber layer having dispersed within the fine fiber layer an active particulate material. Fluid that flows through the assemblies of the invention can have any material dispersed or dissolved in the fluid react with, be absorbed by, or adsorbed onto, the active particulate within the nanofiber layer. The structures of the invention can act simply as reactive, absorptive, or adsorptive layers with no filtration properties, or the structures of the invention can be assembled into filters that can filter particulate from a mobile fluid while simultaneously reacting, absorbing, or adsorbing materials from the mobile fluid.

First claim

We claim:

1. A filter media comprising:
a substrate; and
a fine fiber web disposed on the substrate, wherein the fine fiber web comprises:
a fine fiber; and
an expandable spacer means,

wherein the expandable spacer means is interspersed in the fine fiber material.

2. The filter media of claim 1 , wherein the expandable spacer means comprises a microsphere.

3. The filter media of claim 1 , wherein heat treatment expands the volume of the spacer means.

4. A filter media comprising:
a substrate; and
a fine fiber web disposed on the substrate, wherein the fine fiber web comprises:
a fine fiber; and
an expanded spacer means,

wherein the expanded spacer means is interspersed in the fine fiber material.

5. The filter media of claim 4 , wherein the expanded spacer means comprises a microsphere.

6. A filter media comprising:
a substrate;
a fine fiber web disposed on the substrate; and
an expandable spacer means,

wherein the expandable spacer means is interspersed in the fine fiber web.

7. The filter media of claim 6 , wherein the expandable spacer means comprises a microsphere.

8. The filter media of claim 6 , wherein heat treatment expands the volume of the expandable spacer means.

9. A filter media comprising:
a substrate;
a fine fiber web disposed on the substrate; and
an expanded spacer means,

wherein the expanded spacer means is interspersed in the fine fiber web.

10. The filter media of claim 9 , wherein the expanded spacer means comprises a microsphere.

11. A filter media comprising:
a substrate; and
a fine fiber web disposed on the substrate, wherein the fine fiber web comprises:
a fine fiber; and
means for tunably controlling the solidity of the fine fiber layer,

wherein the means for tunably controlling the solidity of the fine fiber layer is interspersed in the fine fiber web.

12. The filter media of claim 11 , wherein the solidity of the fine fiber layer is tunably controlled by applying heat.

Assignees

• Donaldson Co Inc

Inventors

• Dallas Andrew J
• Ding William Lefei
• Joriman Jon D
• Zastera Dustin
• Giertz James R
• Kalayci Veli E
• Chung Hoo Y

Classifications

• B01D2239/069

  Special geometry of layers · CPC title

• B01D2239/065

  More than one layer present in the filtering material · CPC title

• B01D2239/064

  The fibres being mixed · CPC title

• B01D2239/0631

  Electro-spun · CPC title

• B01D39/04 Primary

  Organic material, e.g. cellulose, cotton · CPC title