HYDROPHILIC ELECTRET MEDIA
The present disclosure describes a surfactant treatment for a polyolefinic nonwoven fabric used as a filtration medium or for collecting dust and dirt, e.g. as a mop or similar device. The surfactant treatment consists essentially of carbon, hydrogen and oxygen atoms. The surfactant treated material has a BFE after electret treatment of at least 97 percent and is hydrophilic.
1 . A surfactant treatment for a polyolefinic nonwoven fabric material consisting essentially of carbon, hydrogen and oxygen atoms, wherein said material has a BFE after electret treatment of at least 97 percent and is hydrophilic.
2 . A dust and dirt collection device comprising the nonwoven material of claim 1 .
3 . A filter material comprising the nonwoven material of claim 1 .
4 . The treatment of claim 1 wherein said treatment is applied at a rate of between a positive amount and 1 weight percent.
5 . A nonwoven material having thereon the dried residue of an aqueously applied surfactant treatment that is essentially free of silicon, potassium, phosphorus and sulfur, wherein said material has a BFE after electret treatment of at least 97 percent and is hydrophilic.
6 . A dust and dirt collection device comprising the nonwoven material of claim 5 .
7 . A filter material comprising the nonwoven material of claim 5 .
8 . The treatment of claim 5 wherein said treatment is applied at a rate of between a positive amount and 1 weight percent.