MULTILAYER FILTERING AND SORPTIVE NONWOVEN MATERIAL Russian patent published in 2017 - IPC B01D39/16 

FIELD: textile.

SUBSTANCE: invention relates to multilayer filtering and sorptive nonwoven materials. Disclosed is multilayer filtering and sorptive material, consisting of filtering part, sorptive part and outer reinforcing layer from woven or nonwoven material, arranged on one or two sides. Material filtering part contains 1–3 layers of nonwoven fibrous material, produced by aerodynamic moulding from polymer melt and containing mixture of fibres with diameter of 0.5–2.0 mqm and 2.0–4.0 mqm at their following ratio of 1.2–3.0, respectively. Sorptive part is 2-5 layers of nonwoven fibrous material, produced by aerodynamic moulding of polyurethane and polyacrylonitrile solutions mixture, filled with active solid filler particles with particles size ranging from 10 to 80 mqm.

EFFECT: disclosed material has high dynamic sorptive activity by cyclohexane, good strength properties, air permeability, which enables to use material for making respiratory protection equipment and filtering type protective clothes.

3 cl, 4 dwg, 1 tbl, 5 ex