In my experience, the UV stabilized component is a coating on the exterior
of the plastic. But it's possible it could also be in the form of
impregnated sunscreen... Always best to use un coated material for this.
Brian
-----Original Message-----
From: Karl Vacek [mailto:kvacek@ameritech.net]
Sent: Thursday, July 16, 2009 12:05 PM
To: 308gtsi@roadrunner.com; triumphs@autox.team.net
Subject: Re: [TR] Forming plexi
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.
_______________________________________________
Support Team.Net http://www.team.net/donate.html
This list supported in part by the Vintage Triumph Register
http://www.vtr.org
Triumphs@autox.team.net
http://autox.team.net/mailman/listinfo/triumphs
http://www.team.net/archive
|