Laminated safety glass was invented by chemist Édouard Bénédictus after a lab accident in 1903. A glass flask coated with the plastic cellulose nitrate was dropped, shattering but not breaking into pieces. In 1909 he filed a patent, after hearing of a car accident causing injury by glass debris.

Laminated glass

“Sandwich Glass” redirects here. For other uses, see Sandwich Glass (disambiguation).

Automobile windshield with “spider web” cracking typical of laminated safety glass.

Laminated glass is a type of safety glass that holds together when shattered. In the event of breaking, it is held in place by an interlayer, typically of polyvinyl butyral (PVB), ethylene-vinyl acetate (EVA), or Thermoplastic Polyurethane (TPU), between its two or more layers of glass. The interlayer keeps the layers of glass bonded even when broken, and its high strength prevents the glass from breaking up into large sharp pieces. This produces a characteristic “spider web” cracking pattern when the impact is not enough to completely pierce the glass. In the case … Continue Reading (7 minute read)

10 thoughts on “Laminated safety glass was invented by chemist Édouard Bénédictus after a lab accident in 1903. A glass flask coated with the plastic cellulose nitrate was dropped, shattering but not breaking into pieces. In 1909 he filed a patent, after hearing of a car accident causing injury by glass debris.”

  1. himmmmmmmmmmmmmm

    And the salesman said “hit it with a hammer to see if I’m lying”

  2. Enoghost1

    I work in the glazing & locks industry & I didn’t know that. Everyday is a school day

  3. AudibleNod

    I was told the glass jars of acid were laminated when I worked in a lab. I didn’t pay any attention. Then a lab worker really wanted to show me. A week or so later we finished off a bottle of acid and he made this big production of showing everyone. And he dropped the bottle into a large carboard box. It did what it was supposed to do and shattered inside its own laminated coating. Not as impressive as he made it out. But nice to see that they’re thinking of me.

  4. MaxanderG

    At least half of all inventions seem to be discovered by pure chance when messing up your actual experiment.

  5. TheGoatFarmer

    I’m an engineer that works with laminated glass. This story is part of a lot of presentations I give to customers explaining the history of the product. Surprised to see it today on my front page!

    Any glass questions… AMA!

  6. PRIMEmbarrassment64

    A man of humanity..

  7. Disastrous_Acadia823

    I love the number of scientific breakthroughs come from accidents. There are no mistakes only happy accidents.

  8. Reddituser853754

    Well I thankful to him …for my impact windows so much better than hurricane shutters.

  9. Ragemundo

    It seems chemistry is based on accidents.

Leave a Comment