Chemical cartridge for protective respiratory mask.

摘要

A chemical cartridge (1) for protective respiratory mask (2) comprising separate active filter section and universal filter section. The active filter section is formed of an absorbent medium impregnated with a reagent capable to capture and derive a target toxic pollutant having a chemically active function into an inert, non-volatile and non-toxic matter as air is inhaled. When air is inhaled by the user as indicated by the arrow (8), the flap (6) moves away from the disk section (5) to allow the inhaled air to pass through the perforations such as (9) of the latter section. When air is exhaled, the flap (6) comes into contact with the disk section (5) to prevent the exhaled air to penetrate the cartridge (1) through the perforations (9) ; migration of the pollutants captured in the cartridge (1) is thereby prevented to maintain the efficiency and safety of the chemical cartridge. <IMAGE>