Hi all and again thanks to Ahmet ( from the Yahoo group )for sending a sample to me.
I have tested extensively the Adhesive backing FEP Teflon and am abandoning that
route for now. It seems to have the same problem as straight
polycarbonate/nylon/Polyethylene. It is difficult to separate the resin ( at
least mine )without it actually coming off the glass base. You could be using a
different resin with different results, but for my purposes it does not work.
Time to marry these two together.
For now I’m just folding the film in place.
I used some clips and an old ruler to cut two pieces 95mm in length:
and stretched the Teflon Film on top of the glass. It kind of clings to the glass by itself.
Just secured it on two opposite sides:
That is it for now… Later!
Got Milk? No?
Got DuPont FEP Teflon then? YES!
It is a plastic, clear and somewhat like cellophane used in the floral business. There is an adhesive backing version, so
that would be the one to get, but could not find a source for it. In my neck of the woods DuPont does not even import or distribute the FEP film(Fluorinated
ethylene propylene). When you heat it up it becomes more flexible. I wrote about
this in http://3dlprint.com/2011/11/what-will-happen-if-i/.
I had a small sample piece then, now I have a much larger sheet, also thicker.
when I unroll even 5~10cm it is statically charged. It is hydrophobic, rather
resinophobic i.e. it repels resin and forces it to try to minimize the contact
I placed a drop of resin and spread it around:
as you can see just on its own it tried to form a sphere.
The cured resin is released easier than silicone, but not by that much.
What helps is that it flexes and literally peeled off the cured resin.
There were no ill effects to the film after polymerizing a drop of resin on top of it.
I wiped it with a cotton cloth and then paper towels with Isopropyl Alcohol.
Clearly “THE SECRET” ingredient in a lot of printers.
More to come…