[DeTomaso] Lexan?

[Sean Korb]

Be watchful if you use an anti-scratch coating and be sure it resists
solvents.  I got a face full of gasoline a couple of weeks back (they call
me "fireball".  I wonder why?) when working on a tiller.  My glasses have
anti-scratch coating and the coating is delaminating now due to the solvent
exposure.

sean

On Thu, Dec 9, 2010 at 12:22 AM, J. Sean Keane <jskeane6 at gmail.com> wrote:

> Will,
>
> Acrylic (such as Plexiglas) is brittle.  I wouldn't use it in an
> application that requires resistance to vibration.  Polycarbonate is a much
> stronger material, although it is more susceptible to scratching.  You can
> get the best of both worlds by using polycarbonate that has an anti-scratch
> coating.  Both Lexan and Makrolon are good brands for that.  Polycarbonate
> is often used as a replacement for glass in window applications; if it
> turned yellow, that would make customers unhappy.  Buy UV stabilized
> polycarbonate (which most of it is) and you will not have any problems with
> yellowing.   You can also get it in colors, like gray and bronze.  You can
> drill and tap polycarbonate and it will not crack.  This stuff is really
> tough.  For the ultimate cool look, though, use polycarbonate fasteners on
> your polycarbonate sheet:
>
>
> http://www.usplastic.com/catalog/item.aspx?itemid=24592&catid=704&clickid=searchresults
>
> This is a great web site, I've bought a ton of stuff from them and have
> always been happy.
>
> There's one thing I would caution you about, though.  I have not had great
> luck with polycarbonate adhesives.  They are fine for sealing an edge, but I
> recommend some kind of fastener for strength.  On the other hand, my
> application is probably a bit more demanding than yours.  I'm into amateur
> high power rocketry, and I have a 9 1/2 foot tall, 4 1/2 inch diameter
> rocket that is made completely from transparent materials, much of it
> polycarbonate.  The glue just doesn't cut it when your pulling 12 gees at
> 500 MPH.  My Pantera is fast, but not that fast.
>
> Seriously, use some kind of a fastener and don't worry about cracks, it
> won't happen.
>
> Regards,
>
> Sean
>
> Will wrote:
>
> Hey Guys.
> I want to build a plexiglass intake box for my IR system. I want to
> duplicate what Goran has done to his. He hasn't got back to me.
>
> http://www.hemipanter.se
>
> Picture of box about 20% way down.
>
> What type of plexi-glass should I use? Or should it be lexan? There will be
> heat and vibration, of coarse, so what is the best material? I'm thinking
> 3/8" thick? Can I drill and tap or will the vibration cause cracks
> eventually?
> Will
>
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-- 
Sean Korb spkorb at spkorb.org http://www.spkorb.org
'65,'68 Mustangs,'68 Cougar,'78 R100/7,'60 Metro,'59 A35,'71 Pantera #1382
"The more you drive, the less intelligent you get" --Miller
"Computers are useless.  They can only give you answers." -P. Picasso