Patent ID: 7727914

Claim:
A flexible, penetration resistant article comprising a plurality of fibrous layers including continuous filament yarns, and having an areal density of less than about 4.4 kilograms per square meter, wherein at least one of the plurality of fibrous layers comprises a fiber having a tenacity of at least about 30 grams per decitex and a continuous filament yarn having a linear density of less than about 1100 decitex; (a) wherein the plurality of fibrous layers includes multiple layers made from polybenzoxazole fibers or polybenzothiazole fibers and multiple layers made from polyareneazole fibers, polypyridazole fibers, or polypyridobismidazole fibers; or wherein the plurality of fibrous layers consists essentially of polyareneazole fibers, polypyridazole fibers, or polypyridobismidazole fibers; and (b) wherein the continuous filament yarns are selected from the group comprising polyamid fibers, polyolefin fibers, polybenzoxazole fibers, fibers polyareneazole fibers, polypyridazole fibers, polypyridobisimidazole fibers, and mixtures thereof.