Hi Tom,
Lexan is an excellent choice. It machines well, and doesn't propagate cracks
like other similar looking plastics (acryllic, etc.). BTW, Lexan is a
proprietary name. The generic name is "Polycarbonate" . There is a uv
resistant form available, but it is quite a bit more expensive - check with
your suppliers on that. I've taken to painting my clear polycarbonate using
Polyurethane black paint. From what I've read and heard, this kind of paint
is probably one of the most durable for long term exposure to the elements
and is quite readily available. I would be interested in hearing
knowledgeable comments about the choices of paints (coatings) for use on
antennas.
73,
Riki, 4X4NJ
w8ji.tom wrote:
> I want to make spreaders for open wire line. My plan is to have a CNC
> machine punch out several hundred spacers with slots for the main wire and
> holes for a small tie wire. I'm going to try and make the spreader so it
> just snaps over the line tightly, because I have so many to install.
>
> Would Lexan be a good choice for life and ability to be punched, or some
> other material better? The sun is a major worry here in the south. I also
> want a material that won't break, absorb water, or a rough or abrasive
> surface that bonds with dirt and stuff. I'd like it to be slick.
>
> 73 Tom
>
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