Yeah, an earlier post said that these cutting boards are nylon ... they
Another thing to keep in mind is that HDPE will cold flow, so depending
upon the load and the surface area of the contact you could end up with
a problem eventually. I'm not sure I'd want to use the stuff for an
end insulator on a wire dipole, for instance, if the wire merely passed
through a hole in the material.
On 4/22/2012 7:54 AM, Jim Lux wrote:
> I've used a lot of cutting boards as HV insulators..
> the microwave test is sort of so, so.. it's at 2.5 GHz and it more
> measures RF absorption than things that are actually more important like
> HV breakdown and water absorption.
> If the cutting board is white high density polyethylene, it makes a fine
> insulator for HV (and RF).
> It *does* have a low melting point. This is handy when you want to
> weld it, not so handy when machining it. If you want to use tools that
> "cut", nice and sharp is needed.
> It saws about like wood, so use a wood saw, not a hacksaw. A hole saw
> works pretty well. Keep the tool cool, so the plastic doesn't melt.
> Passing a torch over the cut edge will "fire polish" it and take off
> rough edges and sanding marks. (this works real well for acrylic and
> polycarbonate, by the way)
> Most of the HDPE is not UV inhibited, so it might breakdown in a few
> years (your mileage may vary.. I've got some chunks that have been
> outside for getting on towards 10 years in SoCal sunshine, and they look
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