FILTRATION MATERIAL Russian patent published in 2013 - IPC B01D39/16 

FIELD: process engineering.

SUBSTANCE: invention relates to filtration materials intended for use in analytical tapes of continuous-action devices for aerosol sampling and measuring the content of alpha-active isotopes by spectrometry. Proposed two-layer material is composed of tape bearing working layer of polymer fibers made by electrical forming from the solution of polymer mix including polyvinylidene fluoride/polytetrafluoroethylene and polyvinylidene fluoride/hexafluoropropylene. Working layer fibers feature diameter of 0.3-0.5 mcm. Second layer represents a nonwoven polymer substrate composed of polyester 20-30 mcm-dia fibers.

EFFECT: higher accuracy of analysis and material heat-and-chemical resistance.

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