My dad was a WWII vet.
He survived the war, and went on to develop the process, and obtain the patent, for the continuous polymerization process for manufacturing Kevlar fiber.
See
http://patft.uspto.gov/netacgi/nph-...50&s1=3849074.PN.&OS=PN/3849074&RS=PN/3849074
Stephanie Kwolek developed the formula for Kevlar. Problem was, nobody could get it to run through a spinning-machine for more than a couple minutes - and then it would gum up the works - requiring a complete disassembly and cleaning of the machine (required many hours) before it could be re-started.
After about a year of experimenting with different "fixes," Dad "invented" this gizmo that cleared the clog instantly, and without any need to disassemble the spinning machine.
I used a spool of one of the early batches as kite-string when I was a youngster.
It wasn't named Kevlar yet. Dad just referred to it as "PRD-58."
(Project Research and Design formula 58)
PRD-58 was unsuitable as kite-string because it was too fine-gauge, and would slice into a tree branch like a knife.
Once it cut into the bark, it would hang, and the kite-flier was done.
No amount of pulling on the line would break it.
All you could do is cut it at the spool. The kite would stay marooned.
They found a better use for Kevlar anyway.
At least I think this soldier would agree.
Dad's grandson (my nephew) now works at DuPont, shooting Kevlar daily, and developing data for soft body-armor development.