I'm doing a presentation on Kevlar and I'm currently looking for information on alternatives to the use of Kevlar in bullet proof vests. Wikipedia has given some examples (Dyneema, Gold flex, etc) but they neglect to give any stats or detailed comparisons between those materials and Kevlar. I've tried googling and searching for threads on here but can't find anything useful. Does anyone know any sites which list things like ultimate tensile stress or Young's modulus for these materials? Any help would be greatly appreciated. Edit: I've found http://www.matweb.com/search/SpecificMaterial.asp?bassnum=PTOYD0" which gives some info on Dyneema, but any other sites with similar info for materials will still be useful.