Substrate treatments

Patent metadata

Field	Value
Publication number	US-2021106935-A1
Application number	US-201916970102-A
Country	US
Kind code	A1
Filing date	Feb 14, 2019
Priority date	Feb 15, 2018
Publication date	Apr 15, 2021
Grant date	—

Abstract

The current technology relates to substrate treatments, treated substrates, and filters. Treated substrates can have a treated surface that defines a pattern and/or gradient among untreated surface areas. A treated surface area can have a higher roll off angle for a 50 μL water droplet when the surface is immersed in toluene that the untreated surface areas. Substrates can be treated by, for example, exposing a substrate surface and/or fibers to ultraviolet (UV) radiation. UV radiation can be applied to surfaces via a mask, lens, waveguide, reflector, as examples. UV radiation can be applied to surfaces at varying intensities, which can create a treatment gradient.

First claim

1 . A method of treating a substrate comprising:
filtering ultraviolet (UV) radiation through a mask defining an opening pattern; and exposing a surface of the substrate to the filtered UV radiation to treat a portion of the surface.

2 . The method of claim 1 , wherein the surface of the substrate is planar.

3 . The method of claim 1 , wherein the treated portion of the surface has a roll off angle in a range of 50 degrees to 90 degrees and a contact angle in a range of 90 degrees to 180 degrees for a 50 μL water droplet when the surface is immersed in toluene.

4 . The method of claim 1 , wherein treating the portion of the surface results in an untreated portion of the surface, and the untreated portion of the surface has a roll off angle between 0 degrees and 50 degrees for a 50 μL water droplet when the surface is immersed in toluene.

5 . The method of claim 1 , wherein the surface of the substrate is non-planar.

6 . (canceled)

7 . The method of claim 1 , wherein the surface of the substrate comprises at least one of an aromatic component and an unsaturated component.

8 - 14 . (canceled)

15 . The method of claim 1 , further comprising exposing the surface to H 2 O 2 while exposing the surface to the filtered UV radiation.

16 . The method of claim 1 , further comprising exposing the surface to ozone while exposing the surface to the filtered UV radiation.

17 . The method of claim 1 , further comprising exposing the surface to oxygen while exposing the surface to the filtered UV radiation.

18 . The method of claim 1 , wherein exposing the surface to UV radiation is for a period of time in a range of 2 seconds to 20 minutes.

19 . A method of treating a surface of a fiber comprising:
filtering UV radiation through a mask defining an opening pattern; exposing a surface of the fiber to the filtered UV radiation to treat a portion of the surface of the fiber; and forming a substrate from the fiber, wherein the substrate has a surface.

20 . The method of claim 19 , wherein the surface of the substrate has an increased roll off angle for a 50 μL water droplet when the substrate surface is immersed in toluene compared to a substrate formed from untreated fibers.

21 - 29 . (canceled)

30 . A substrate comprising:
a first surface of the substrate defining UV radiation-treated surface areas and non-UV radiation-treated surface areas, wherein the UV radiation-treated surface areas define a pattern.

31 . The substrate of claim 30 , wherein the UV radiation-treated surface areas define a roll off angle in a range of 50 degrees to 90 degrees and a contact angle in a range of 90 degrees to 180 degrees for a 50 μL water droplet when the first surface is immersed in toluene.

32 . The substrate of claim 30 , wherein the non-UV radiation-treated surface areas define a roll off angle between 0 degrees and 50 degrees for a 50 μL water droplet when the first surface is immersed in toluene.

33 . The substrate of claim 30 , wherein the UV radiation-treated surface areas comprises at least one of an aromatic component and an unsaturated component and the non-UV radiation-treated surface areas lacks an aromatic component and an unsaturated component.

34 . The substrate of claim 30 , wherein the substrate comprises filter media.

35 . The substrate of claim 30 , comprising a fiber web forming the first surface.

36 . The substrate of claim 30 , comprising a membrane forming the first surface.

37 . The substrate of claim 30 , comprising a non-woven fiber web forming the first surface.

38 - 133 . (canceled)

Assignees

• Donaldson Co Inc

Inventors

• Rahmathullah Aflal
• Dallas Andrew J
• Sontag Stephen K
• Hauser Bradly G
• Moravec Davis B
• Kapoor Vijay K
• Goertz Matthew P
• Tuma Daniel L
• Dammann Warren E
• Cronin Michael J
• Madsen Mike J
• Rajgarhia Stuti S
• Christ Charles S
• Block Joseph M

Classifications

• B01D39/18

  the material being cellulose or derivatives thereof ({cork or peat B01D39/1646} ; making filter paper D21F11/14) · CPC title

• B01D2239/0421

  Rendering the filter material hydrophilic · CPC title

• B01D39/1623 Primary

  of synthetic origin · CPC title

• B01D2239/1233

  Fibre diameter · CPC title

• B01D2239/0478

  on a layer of the filter · CPC title