Vapor Breakthrough from Liquid drops Impacting Air-Permeable Chemical Protective Fabric

摘要

The interaction between drop impact and vapor breakthrough for several kinds of air-permeable fabric composites (an outer shell with an adsorbent liner) is determined under convective flow conditions. Vapor breakthrough is measured using methyl Sali- cylate, a chemical agent simulant, for static and dynamic liquid drop placement on either the shell fabric alone or in combination with an activated carbon-loaded foam liner backing. Vapor concentration, detected by means of a photo-ionizer, is used to determine breakthrough curves, while image analysis provides a quantitative sharac- terization of the impact behavior of the liquid drops by measuring liquid spreading, splashing, and breakthrough.