Fabrics with strain-responsive viscous liquid polymers
AssigneeE.I. du Pont de Nemours and Company
InventorsKalika Ranjan Samant, Bryan Benedict Sauer, Minshon J. Chiou
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Abstract
A penetration resistant article with an area density less than 1.5 lb/ft2 made of a plurality of fibrous fabric layers that have applied thereto about 1 to 8 percent by weight of a polymer having a glass transition temperature in the range of minus 40 to about 0° C. and a zero shear melt viscosity 2×106 to about 1013 poise at 20° C.
Claims12
A penetration resistant article comprising a plurality of fabric layers, at least one layer comprising;
- fibers and a liquid polymer, selected from the group consisting ethylene/methyl acrylate, polyvinyl propionate, poly (hexyl methacrylate), and mixtures thereof, the polymer having;
- a glass transition temperature in the range of minus 40 to about 0° C., and
- a zero shear melt viscosity 2×106 to about 1013 poise at 20° C. wherein the article has an area density less than 1.5 lb/ft2 and the polymer is 1 to about 8 percent by weight of the fabric.
A penetration resistant article comprising a plurality of fabric layers at least one layer comprising fibers and a liquid polymer selected from the group consisting of ethylene-methyl acrylate, polyvinyl propionate, poly(hexyl methacrylate), and mixtures thereof, the polymer having a glass transition temperature in the range of minus 40 to about 0° C., and a zero shear melt viscosity 2×106 to about 1013 poise at 20° C. that is 8% by weight or less of the layer, wherein the article has at least a 10% improvement in back face deformation compared to an identically constructed article not having the polymer when tested in compliance with NIJ standard 0101.04.
Dependencies are inferred from the claim text.