[TR] Forming plexi

[Karl Vacek]

I've carried this nugget of possibly-bogus information for neary 40 years. 
I made a replacement windshield for my race car out of Lexan and tried to 
bend it as I had the original Plexi one.  However, I got a diffusion of tiny 
bubbles throughout the plastic in the area I heated.

At the time, the glass guy who'd given me the Lexan told me that it was 
because that was UV-stabilized Lexan.  He said the UV stabilizer was just 
water and when heated it turned to steam, making the bubbles.

Truth or BS ???

Karl


> During my years in aerospace R&D I used a lot of plexi and lexan for
> prototypes, and used a heat gun (hair dryer couldn't get hot enough) to 
> make
> all sorts of smooth shapes.