Thin, squishy bike helmet hardens on impact

Read more on this subject: Inventions
News Story Source:, By Ben Coxworth
The Newton-Rider consists of a flexible, stretchable liner on the inside, joined to a series of pads on the outside. Those pads are composed of a proprietary blend of viscoelastic and non-Newtonian materials. "Viscoelastic" refers to substances that exhibit both viscous and elastic characteristics, while "non-Newtonian" refers to fluids that temporarily become more viscous (and thus harder) when subjected to stress.

As a result, the helmet is somewhat squishy and pliable during regular riding. And because there are spaces between the pads, the Newton-Rider as a whole is able to stretch and bend, to conform to the contours of the rider's head. It can also be folded up and stuffed in a bag.

What's more, the helmet is just 16 mm thick – by contrast, traditional polystyrene foam helmets have a thickness of about 30 to 35 mm. The final commercial version should weigh somewhere between 450 and 460 g (15.8 and 16.2 oz).

In the event of a crash, the N
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