Protective material for atomic. biological and chemical protection - consists water-and wind-proof layer of crosslinked vinyl copolymer applied to outside of clothing

摘要

Composite material (I) for protective clothing (II) consists of smooth, washable, water- and wind-proof layer which is permeable to water vapour (III), applied to the outside of (II). (I) is a polyurethane copolymer at least one component of which has hydrrophillic gps. crosslinked so that the water absorption is not above 30 % pref. below 20% and the prod. can be readily welded, layer (III) has thickness 10-100 (pref. 20-70 microns. USE/ADVANTAGE - (I) is useful for the prodn. of protective clothing esp. for military use to protect against heat (heat stroke, napalm, etc) and against atomic, biological and chemical weapons (ABS protection). The claims include protective clothing against radioactive dust, and ABC-protective clothing in which the textile layer coated with (III) serves as a protection against thermal effects and has a layer of adsorbers behind it. Crosslinking reduces the swelling of the material to 20%, water vapour permeability is also reduced by 30-40 % but this still permits perfectly adequate outward transport of moisture, together with good weldability. The coating is impermeable to fall-out, rain and wind (contrast present NATO protective clothing, in which gusts of wind can force ABC agents into the filter layer and overload it).