Claims
- 1. A fluid cleaning filter comprising a composite matrix composed of a pleated substrate configured into a pleated shape and an absorbent-containing layer,
wherein the pleated substrate is made of polyurethane foam at least a part of which has a three-dimensional network skeletal structure, and the composite matrix is configured into a cylindrical shape.
- 2. A fluid cleaning filter as claimed in claim 1, wherein said absorbent is active carbon.
- 3. A fluid cleaning filter as claimed in claim 1, wherein the absorbent-containing layer contains a catalyst to decompose substances absorbed by the absorbent.
- 4. A fluid cleaning filter as claimed in claim 3, wherein the catalyst is a photocatalyst.
- 5. A fluid cleaning filter as claimed in claim 1, wherein the absorbent-containing layer comprises a material having fluid-permeability and the absorbent held in the material.
- 6. A fluid cleaning filter as claimed in claim 5, wherein the material has a three-dimensional network skeletal structure having a pair of two-dimensional network skeletal structures which are disposed in parallel to each other at a cirtain spacing and connected together with threads.
- 7. A fluid cleaning filter as claimed in claim 6, wherein the three-dimensional network skeletal structure is made up of polyester fibers, polyamide fibers, polypropylene fibers or composite fibers thereof.
- 8. A fluid cleaning filter as claimed in claim 1, wherein the pleated substrate comprises the polyurethane foam and a filtering medium layer formed on the surface of the polyurethane foam, the filtering medium layer being made of fibers.
- 9. A fluid cleaning filter as claimed in claim 8, wherein the fibers are synthetic fibers or glass fibers.
- 10. A fluid cleaning filter as claimed in claim 8, wherein the fibers are electrostatically charged.
- 11. A fluid cleaning filter as claimed in claim 8, wherein the filtering medium layer is located on the surface of the polyurethane foam facing the material.
- 12. A fluid cleaning filter as claimed in claim 8, wherein the filtering medium layer has a nonwoven fabric layer.
- 13. A fluid cleaning filter as claimed in claim 12, wherein the filtering medium layer has a net made of fibers and said nonwoven fabric layer interlocked with the net.
- 14. A fluid cleaning filter as claimed in claim 13, wherein the pleated substrate is configured into a cylindrical shape in such a manner that the pitch direction between the pleats thereof is oriented to the circumferential direction of the cylinder, and
the absorbent-containing layer is configured into a cylindrical shape coaxially with respects to the cylindrical pleated substrate.
- 15. A fluid cleaning filter as claimed in claim 14, wherein the cylindrical absorbent-containing layer is located along the inner circumferential surface of the cylindrical pleated substrate.
- 16. A fluid cleaning filter as claimed in claim 1, wherein the density of cells in the polyurethane foam is in a range of 6 to 80 PPI.
- 17. A filter device equipped with a fluid cleaning filter as claimed in claim 1.
- 18. (canceled).
- 19. A filter device as claimed in claim 17, wherein the filter device is further equipped with a light irradiating means to irradiate light to the absorbent-containing layer.
- 20. A filter device as claimed in claim 19, wherein the light includes ultraviolet light.
- 21. (canceled).
Priority Claims (1)
Number |
Date |
Country |
Kind |
2002-031050 |
Jul 2002 |
JP |
|
CROSS REFERENCE TO RELATED APPLICATION
[0001] This is a continuation application of PCT/JP03/01112 filed on Feb. 4, 2003.
Continuations (1)
|
Number |
Date |
Country |
Parent |
PCT/JP03/01112 |
Feb 2003 |
US |
Child |
10889251 |
Jul 2004 |
US |