For mechanical/structural strength under long-term UV exposure, Delrin 507 seems to meet our criteria almost suspiciously well.
We're machining antenna element mountings, which will face years of daily UV at temperate latitudes. (45D North. The loadings will be fairly low, however.
Does anyone...
I've priced some of the imides- and clutched my head howling.
I'll pass on the imides.
Just to clarify, Pat; acrylic will keep it's mechanical/structural properties after, say, 10 years daily UV sunlight exposure?
And PTFE? And PET?
Thanks!
I understand that the imides are the only plastics rated as "excellent" for UV-resistance/stability. My interest in the imides is also structural: machined supports for antenna elements. The loads will actually be rather low; wind-loading on the elements only. Cost is irrelevant. Color and color...