US 12,257,819 B1
Multi-layer barrier fabric with extended breakthrough time
Robert Kaiser, Edmonds, WA (US)
Assigned to United Tactical Supply, LLC, Surf City, NC (US)
Filed by United Tactical Supply, LLC, Surf City, NC (US)
Filed on Jan. 17, 2024, as Appl. No. 18/414,902.
Int. Cl. B32B 5/26 (2006.01); B32B 7/05 (2019.01); B32B 7/12 (2006.01); B32B 37/12 (2006.01); F42D 5/04 (2006.01)
CPC B32B 5/26 (2013.01) [B32B 7/05 (2019.01); B32B 7/12 (2013.01); B32B 37/1207 (2013.01); B32B 37/1284 (2013.01); B32B 2037/1215 (2013.01); B32B 2307/714 (2013.01); B32B 2307/718 (2013.01); B32B 2307/7376 (2023.05); F42D 5/04 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A multi-layer barrier fabric adapted to provide a barrier against a hazardous material, the multi-layer barrier fabric comprising:
an inner layer of facing fabric having an inner face configured to contact an environment containing hazardous material;
an adsorbent layer of activated carbon fabric disposed adjacent to the inner layer and configured to adsorb the hazardous material to reduce concentration of the hazardous material and thereby permeation driving force;
a barrier layer of low-permeability fabric disposed adjacent to the adsorbent layer of activated carbon fabric and configured to increase residence time of the hazardous material in the activated carbon fabric and to decrease escape probability of stray molecules of hazardous material that are not initially intercepted by the activated carbon fabric, wherein the barrier layer of the low-permeability fabric has a permeability to air less than or equal to 20 cm3/m2/24 hour at 1 atmosphere ΔP and a permeability to water vapor less than or equal to 40 g/m2/24 hour at 38° C. and 90% relative humidity (RH); and
an outer layer of facing fabric disposed adjacent to the barrier layer and having an outer face configured to contact an environment free of hazardous material.