I made some tests on polycarbonate sheet in fires and EM fields last
night. The material tested is called "COROTHERM" and as mentioned
earlier, is available from most DIY outlets
Burn test -
Does not support self combustion. When held in a gas jet just melts and
gives off sooty smoke with a small luminous flame, turning to carbon.
No noxious fumes are given off, unlike other plastic materials. When
removed from flame self extinguishes immediately. I believe this is a
requirement of many building materials now.
EM fields -
Placed a 100 x 200mm piece in a microwave cooker (with the statutary cup
of water to protect the cooker !) The test piece didn't even get warm
after several minutes of 'cooking'. Paxolin or SRBP sheet, in
comparison, gets very hot with this same treatment.
On memory alone, a 2.4m long by 0.6m piece of double walled 10mm thick
sheet costs around £25 - 30 (UKP) from B&Q.
Looks ideal for ATU huts, and even formers for large coils. One side
is ultraviolet protected so when using outdoors it has to be mounted the
right way round; the peel off protective film labels which side is
which..
Andy G4JNT
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