aluminum core

This origami-inspired shield absorbs handgun bullets
Brigham Young UniversityEngineering professors at Brigham Young University have designed a new bulletproof shield for law enforcement that can withstand shots fired from 9mm, .357 Magnum, and .44 Magnum pistols. The key difference between this shield and others is its low weight—55 pounds — and its folding mechanism, which takes a cue from origami. The shield’s made of 12 layers of bulletproof Kevlar with an aluminum core in the middle.The engineers say that many bulletproof barriers are made of steel and weigh nearly 100 pounds. … Read more