US Patent 7598185 Composite ballistic panels and method of use

A panel had a first face and a second face, including a strike face portion having a first plurality of plies each containing fibers in a matrix material. There is a support portion adjacent to the strike face portion, the support portion containing a second plurality of plies each having fibers in a matrix material. Each ply is bound to an adjacent ply and the first fibers are lower-performing relative to the second fibers. Protection from a ballistic threat may be provided by providing such a panel with the strike face disposed toward the threat. In another aspect, a composite ballistic panel may contain fibers in a thermoplastic matrix material, to the substantial exclusion of thermosetting matrix materials.