COMPOSITE MATERIAL Russian patent published in 2011 - IPC B01D39/00 B32B5/22 D04B1/00 

FIELD: process engineering.

SUBSTANCE: invention relates to composite multilayer material to be used for drinking water treatment, steam condensate treatment and purification of effluents. Proposed material comprises nonwoven material including ion-exchange fiber and knitted-fabric base. Besides, it comprises nonwoven fiber glass layer. Said ion-exchange fiber represents modified polyacrylic nitrile fiber with carboxyl, hydrazide and amino groups in amount of 1.1-1.2, 2.0-2.2 and 2.9-3.1 mmol/g, respectively. Knitted-fabric base is made from yarn composed of modified finer based on graft copolymer of polycaproamid with phosphorus methacrylate. Layer weight relationship makes 1:(1.6-1.8):(1.3-1.5), respectively.

EFFECT: improved sorption and filtration properties.

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