Filter medium, manufacturing method therefor, and filter equipment using same
US-2015360157-A1 · Dec 17, 2015 · US
Method for producing a filter medium, and a filter medium
US10675575B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10675575-B2 |
| Application number | US-201815898718-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 19, 2018 |
| Priority date | Aug 19, 2015 |
| Publication date | Jun 9, 2020 |
| Grant date | Jun 9, 2020 |
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Abstract
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In a method for producing a filter medium, at least one substrate layer of a nonwoven comprising cellulose fibers and/or synthetic polymer fibers is provided and a fiber layer of polymer fibers is deposited on the at least one substrate layer. Prior to depositing the fiber layer, a solvent is applied to the at least one substrate layer, wherein a material of the substrate layer and/or a material of the fiber layer is soluble in the solvent. A filter medium produced by the method has material-fused connections at crossing points of the polymer fibers and/or cellulose fibers of the substrate layer with the polymer fibers of the fiber layer.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for producing a filter medium, the method comprising: providing at least one substrate layer of a nonwoven comprising cellulose fibers and/or synthetic polymer fibers; depositing a fiber layer of polymer fibers on the at least one substrate layer; applying, prior to depositing the fiber layer, a solvent to the at least one substrate layer wherein a material of the at least one substrate layer and/or a material of the fiber layer is soluble in the solvent. 2. The method according to claim 1 , wherein the fiber layer is a nanofiber layer, wherein at least 90% of the polymer fibers of the nanofiber layer are nanofibers. 3. The method according to claim 1 , wherein the fiber layer is a nanofiber layer, wherein at least 90% of the polymer fibers of the nanofiber layer have an average fiber diameter of less than 500 nm. 4. The method according to claim 3 , wherein the average fiber diameter is less than 200 nm. 5. The method according to claim 1 , wherein the solvent is an acid or a base. 6. The method according to claim 5 , wherein the acid is a diluted acid or a concentrated acid. 7. The method according to claim 5 , wherein the base is a diluted base or a concentrated base. 8. The method according to claim 5 , wherein the acid is an organic acid. 9. The method according to claim 5 , wherein the base is an organic base. 10. The method according to claim 1 , wherein the solvent that is applied to the at least one substrate layer comprises a plastic compound. 11. The method according to claim 1 , wherein depositing the fiber layer is done by electrospinning. 12. The method according to claim 1 , further comprising, after depositing the fiber layer, drying the at least one substrate layer and the fiber layer.
Assignees
Inventors
Classifications
by applying solvents or auxiliary agents · CPC title
Non-woven · CPC title
comprising nanofibres · CPC title
Electro-spun · CPC title
Multiple layers · CPC title
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- What does patent US10675575B2 cover?
- In a method for producing a filter medium, at least one substrate layer of a nonwoven comprising cellulose fibers and/or synthetic polymer fibers is provided and a fiber layer of polymer fibers is deposited on the at least one substrate layer. Prior to depositing the fiber layer, a solvent is applied to the at least one substrate layer, wherein a material of the substrate layer and/or a materia…
- Who is the assignee on this patent?
- Mann & Hummel Gmbh
- What technology area does this patent fall under?
- Primary CPC classification B01D39/18. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jun 09 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).