Abstract: This invention is a hybrid composite yarn comprising: a first polyolefin yarn having >about 80% crystallinity according to WAXS measuring techniques; a second yarn taken from the group consisting of: glass; quartz; carbon; poly(p-phenylene terephthalamide), poly(m-phenylene terephthalamide); poly(vinyl alcohol); poly(1,4-phenylene-2,14-benzibisoxazole) (PBO); poly(1,4-phenylene-2,14-benzobisthiazole) (PBT); poly(benzimidizole) (PBI); poly(ethylene-2,14-naphthalate) (PEN); lyotropic liquid crystalline polymers formed by polycondensation of aromatic organic monomers to form aromatic polyesters, polyamides, aluminia-silicates, basalt, regenerated cellulosic materials and ultra-high molecular weight polyethylene (UHMWPE); and, wherein the first polyolefin yarn and the second yarn are physically combined to form a composite yarn having at least one of the following properties: tenacity greater than about 100% of the expected tenacity based on the volume fraction of the second; an initial modulus >about 100%

Abstract: This invention is a hybrid composite structure comprising: a laminate including two plies of fabric wherein the fabric includes a composite yarn; a first polyolefin yarn included in the composite yarn having about 80% crystallinity according to WAXS measuring techniques; a second yarn physically combined with the first polyolefin yarn and included in the composite yarn; and, wherein the laminate has the physical property of impact energy absorption more than 50% higher than a panel made with an equivalent weight of the second yarn alone as measured by the ASTM D5420 drop-impact testing method.