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US 7,196,023 B2Granted
Chemically resistant radiation attenuation barrier
AssigneeKappler, Inc.
InventorsJohn D. Langley, Todd R. Carroll
Life of this patent
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AssigneeKappler, Inc.
InventorsJohn D. Langley, Todd R. Carroll
Estimating the term…
A unique and novel multi-functional composite fabric and fabrication process for use during chemical, biological, radiological and nuclear countermeasure (CBRNC) events is disclosed. The composite fabric combines the performance characteristics of chemically resistant films and radiation attenuating polymer matrices. The composite fabric offers universal protection against a wide range of military chemical agents, toxic industrial chemicals and materials (TICS and TIMS), biological agents, as well as certain ionizing and non-ionizing forms of radiation. The composite fabric is heat sealable and can be fabricated utilizing hermetically seal seams, and has application in protective clothing and equipment, indoor and outdoor covers, containment systems, bags, drapes, gowns, remains pouches, etc.
A chemically resistant rediation attenuation composite barrier fabric comprising a first ply having ionizing radiation attenuation properties and comprising a mixture of a polumer matrix and an ionizing radiation attenuant, a second ply having chemical barrier properties and comprising a sheet material including at least two polymer layers of different composition, and additionally including an electromagnetic field shielding ply.
A chemically resistant radiation attenuation composite barrier fabric comprising an ionizing radiation attenuation layer comprising a spunbond polypropylene supporting substrate, a film formed of a thermoplastic polyolefin matrix containing 40–80 % by weight barium sulfate covering one surface of the spunbond polypropylene supporting substrate, and a knit fabric layer adhered to said film, and a chemical barrier layer adhered to a surface of the spunbond polypropylene supporting substrate, said chemical barrier layer comprising a coextruded barrier film having polyolefin outter layers and a polyvinylidene chloride interior layer.
A chemically resistant radiation attenuation composite barrier fabric comprising at least one chemical barrier layer, at least one ionizing radiation attenuation layer, and an additional reinforcing layer of a woven, knitted or nonwoven construction adhered to said at least one chemical barrier layer or to said at least one radiation attenuation layer by solvent or aqueous based adhesive lamination, thermal lamination, extrusion lamination, powder bond adhesive lamination, ultrasonic lamination, flame lamination, calendering, or pressure sensitive adhesive lamination, and an organophosphate hydrolase enzyme and/or oxidizing polymer thus rendering the composite reactive to phosphorous-based and oxidizable chemicals such as military chemical warfare agents, wherein the composite fabric has at least 8 hours resistance to the military chemical agents distilled mustard (HD), Sarin (GB), Soman (GD), Lewisite (L), and Nerve Agent (Vx), and the composite further passes ASTM F1671.
Dependencies are inferred from the claim text.