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Foam overmolding/manufacturing

Foam overmolding/manufacturing

Foam overmolding/manufacturing

(OP)
I'm designing a part that needs to be as light as possible, but can take a whacking.

It is a "C" shaped part, about 25" diameter, 1-2" thick, and about 5" wide (radially across the "C").

I will be supporting it from one end of the "C", and it needs to be able to take a light whack (hit with a golf ball), and spring back.

I'm thinking a polyurethane foam overmolded onto a plastic spine.  A foam like the stress balls we all have on our desks.  

But is there another way?  Where can I get data of all the different polyurethane foams.  Any complications with overmolding it onto plastic?

Thanks,
An

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