I was involved in two startups in the armor industry and left the business in 2009.  I've attached some pictures showing our lab where we did composite armor consolidating of test samples prior to going to the ballistic lab to verify performance. 

These particular pictures are showing test panels being made with AGY's HJ1 S2 Glass System using urea-formaldehyde.  A .500" thick S2 Glass HJ1 armor panel will stop a 9mm round within 15', where Kevlar will stop it with a .250" thick panel at that distance, with a significant weight reduction per ply.

This guy gives a good comparison of CF KvLr v FG from an engineering perspective. https://www.youtube.com/watch?v=KHXVf0SaJpA