WET NON-WOVEN FABRIC FOR FILTER, FILTER MEDIUM FOR FILTER, AND FILTER
The wet non-woven fabric for a filter of the present invention comprises vinylon, polyester, and polyvinyl alcohol, the wet non-woven fabric comprises 10 to 20% by weight of the polyvinyl alcohol, and a surface, of the wet non-woven fabric, that is located on an upstream side of air flow has a surface roughness (SMD) of not larger than 2.7 μm.
1 . A wet non-woven fabric for a filter, wherein
the wet non-woven fabric comprises vinylon, polyester, and polyvinyl alcohol, and
a surface, of the wet non-woven fabric, that is located on an upstream side of air flow has a surface roughness (SMD) of not larger than 2.7 μm.
2 . The wet non-woven fabric far a filter according to claim 1 , wherein the surface located on the upstream side of air flow has an average friction coefficient (MIU) of not larger than 0.15.
3 . The wet non-woven fabric for a filter according to claim 1 , the wet non-woven fabric comprises 10 to 20% by weight of the polyvinyl alcohol.
4 . The wet non-woven fabric for a filter according to claim 1 , the wet non-woven fabric comprises 0.001 to 0.1% by weight of a polyacrylic acid ester.
5 . The wet non-woven fabric for a filter according to claim 1 , the wet non-woven fabric comprises a fiber having a length of not longer than 30 mm.
6 . A filter in which the wet non-woven fabric for a filter according to claim 1 is used.
7 . A filter medium for a filter having a laminate structure in which a long-fiber non-woven fabric and the wet non-woven fabric for a filter according to claim 1 are stacked.
8 . The filter medium for a filter according to claim 7 , wherein the long-fiber non-woven fabric is a spunbonded non-woven fabric.
9 . The filter medium for a filter according to claim 7 , wherein an adsorbent is held between the long-fiber non-woven fabric and the wet non-woven fabric.
10 . A filter in which the filter medium for a filter according to claim 7 is used.