FIELD: ventilation.
SUBSTANCE: depth filter of a non-woven self-supported material consists of polymeric supporting fibers with microsize diameters and embedded in the supporting fibers of polymeric filter fibers with nanoscale diameters. The supporting fibers form a coherent three-dimensional filter cage. The filter fibers in the filter capacity are distributed in such a way that their density in the filter capacity is different and increases from the surface of the filter facing the incoming flow of the medium to be cleaned to the surface of the filter through which the medium to be purified exits.
EFFECT: consistent high quality of air or gas purification for a long time.
5 cl, 3 dwg
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