FIBROUS FILTERING MATERIAL Russian patent published in 2008 - IPC D21F11/14 D21H27/08 

FIELD: textile, paper.

SUBSTANCE: invention refers to cellulose-paper industry. Fibrous filtering material is formed in the air environment and contains a chemical fiber - viscose, polyester or polypropylene, as well as milled paper loss with polymerisation degree of 200-800 and surface area of 100-9000 m²/g. The material also contains bast fiber and/or cotton production waste. The milled paper waste is processed by silicone hydrophobisator on silane or siloxane basis (5-25% from dry paper waste weight) and dehumidified to dryness of 85-88%. This provides oil capacity increase of the filtering material, as well as enhancement of its hydrophilic properties, which, in turn, leads to filtering material service life prolongation.

EFFECT: prolongation of filtering material service life.

2 cl, 1 tbl, 2 ex