Patent ID: 7241709

Claim:
A penetration resistant article, comprising: a plurality of flexible layers having an areal density of 0.5 to 6.0 kilograms per square meter, each of the layers made of woven fabric; the woven fabric having a fabric tightness factor of 0.75 to 1.15 and made from ply yarn which comprises a plurality of yarns plied and twisted together in an opposite direction of twist in the plurality of yarns in the ply yarn and without matrix resin impregnating the fabric; the yarns having a linear density of 500 dtex or less, a tenacity of 3 to 16 grams per dtex, and an energy to break of 8 to less than 30 Joules per gram, the yarns further comprising staple fibers; and the staple fibers having a linear density of 0.2 to 7.0 dtex per fiber.