On Fri, 07 Nov 2014 04:17:41 -0500, micky
wrote:
On Wed, 05 Nov 2014 13:05:04 -0500, micky
wrote:
The instructions written in graphics only, no words, on the backing
sheet imply that I must make the hole through my Lexan sheet 3mm bigger
than the screw I'm putting through the hole.
Thanks for all your help.
Unrelated to question of hole size, now I'm thinking I should have
gotten 1/8" lexan instead of 3/16". It would be lighter, easier to
attach, less weight on each hole (so the rivet or whatever wouldnt' rip
out of the vinyl and I also wouldn't have to make as many attachment
points), and since it's lexan, still very unlikely to break.
And it might flex more as the window is supposed to do when the top is
up. (It's supposed to bend in the middle horizontally.)
So that's what I did yesterday, buy a thinner sheet of "lexan". Today
I cut it to the same size.
The 3/16" thick piece weighed 5.75 pounds.
The 1/8" thick piece weighed 3.625 pounds.
Just about 2/3rds, as would be expected. It feels lighter than that,
less than half the weight, but I guess that's an illusion.
I'm glad I bought lighter, even if it was another $25.
So, they also make Lexan with an anti-UV finish, so it won't turn
yellow. It only has to last 3 1/2 more years. Do you think the regular
stuff will stay clear, not yellow, for most of 3.5 years even without
the aniti-UV.
This doesn't matter anymore. While the orginal sheet by Sabic** had no
UV protection, the new sheet by Palram (made in Kutztown, Pa, where my
step-father taught school), called Palsun, has it on one side (and you
can buy it with anti-UV on both sides).
SABIC Innovative Plastics (GE Plastics) who I think hold the own the
word LexanŽ , but loads of companies make the stuff.
http://www.matweb.com/reference/Manu...?MatGroupID=26
They also make Lexan with a mar-resistant finish since it lexan
scratches more easily than acryllic**, though I don't know if one can
get both at the same time.
It looks like I'd have to order this, and buy a whole sheet, 4x8' for
$125. Even if money didn't matter, too much of a hurry to order it.
**I had acryllic the first time and it broke at a corner, at a rivet, so
I think I need the strength of lexan. OTOH, that was 40 years ago.
Maybe they've improved acryllic's non-breaking since then.
The girl who had 7 years experience selling plastic, told me that
acryllic was still brittle, at the very least by comparison to lexan.
I bought a quarter sheet anyhow, for $20. It was labeled green, but
neither I nor the girl could see any color. The guy there did however,
It was also labeled iirc 030:030 or something similar. Means green.