METHOD FOR PREPARING POROUS MATERIAL Russian patent published in 1997 - IPC

FIELD: manufacture of filters for cleaning liquids, and gases, for encapsulation of toxic chemicals, fragrant substances, footwear soles or containers. SUBSTANCE: porous material is prepared from aqueous cellulose suspension. The filler is mineral filler (natural mineral) with particle size of 0.04-0.5 mm such as zeolite, shuntite or apatite. The molded material is dried at 80-90 C and pressure of 0.2-5.0 kgf/sq.cm for 10-20 min. One of the sides of material can, prior drying operation, be coated with vinyl chloride-vinylidene chloride latex in amount of 0.27-0.33 wt.-%. EFFECT: higher efficiency. 2 cl, 1 tbl