Hello, I'm designing a simple rainwater harvesting device, and it involves
a lot of plastic. So I have some questions about the different qualities of
plastic on the market. I'm a novice here.
Let me quickly describe the environment in which the plastic should
The rainwater harvesting platform will be permanently located in a mid-
ocean environment, somewhere near the equator. It's basically a few square
kilometres of plastic film floating on the sea-surface, with tubes sucking
in the rainwater into plastic baggies. The platform has to withstand UV-
radiation, the salty environment of the water, and must be moderately
strong (it must capture rain, and fill itself up with a few centimetres of
this fresh water, so it will basically float above sealevel since
inflatable tubes push it upward when they suck the water into the baggies,
exposing the upper layer of the platform to wind, which can be quite heavy
at times). The platform should withstand moderate storms (since it merely
floats on the waves, this should be no problem).
So knowing all this, which kind of plastic would be most appropriate, you
I've found several commercial polymers (like Hypalon and Hypalon based
Neoprene polymers). But they're all very expensive.
The plastic (film) should cost less than US$ 10 per square metre.
I'd be glad to hear your advice!
[Excuse me for my bad English, I'm not a native speaker. I'm french, I hope
my American friends don't care! :-) ]
- posted 17 years ago