Stephanie Kwolek, inventor of Kevlar used in bullet-proof gear, smartphones, dies at 90

Stephanie Kwolek, a US chemist who invented the Kevlar fibre used in body armour and other bullet-proof gear, has died, her former employer said Friday. She was 90.
Kwolek, who worked for DuPont when she invented Kevlar, died in a hospice, media sources said, citing her friend and former co-worker Rita Vasta, who did not give a cause of death.
"We are all saddened at the passing of DuPont scientist Stephanie Kwolek, a creative and determined chemist and a true pioneer for women in science," DuPont CEO Ellen Kullman said in a statement.
Stephanie Kwolek, inventor of Kevlar used in bullet-proof gear, smartphones, dies at 90
Stephanie Kwolek, 83, shown in this June 20, 2007 file photo taken in Brandywine Hundred, Del., she wears regular house gloves made with the Kevlar she invented.
"She leaves a wonderful legacy of thousands of lives saved and countless injuries prevented by products made possible by her discovery."
Kwolek invented Kevlar, an ultra-strong and extremely lightweight fibre, in the 1960s in what she called "a case of serendipity," The Washington Post reported.
She was looking for a material that could be used to reinforce car tires that was lighter weight and more fuel efficient than the metal previously in use.
The liquid crystal polymer she created became Kevlar, which is five times stronger than steel and extremely lightweight, DuPont said on its website.
Today, the fibre is used in body armour as well as sporting gear, boats - and yes, puncture-resistant tires and also in some smartphones.
Kwolek in 1996 was awarded the National Medal of Technology and Innovation "for her contributions to the discovery, development and liquid crystal processing of high-performance aramid fibres which provide new products worldwide to save lives and benefit humankind."