The idea is to build an electric pad with an non-coated heating wire (~1.3 Ohm/metter): the pad must be flexible under the bed sheet (like this one) but not too much (to prevent it being crumpled which would damage the heating wire and might create shortcuts that could dangerously increase the heat).
This tuto recommends using a PVC+fiberglass mosquito net, which is a good idea since it is flexible but can't be crumpled and on the same time does support relatively high temperature. But he used a coated wire (these wires are, for mysterious reason, not sold anymore). So it might be dangerous with on non-coated wired since mosquito net are not really waterproof and sweat/moisture might create interesting shortcuts...
Any idea of material(s)/fabric that would meet those criteria:
- flexible but not too much.
- non conductive (for electricity)
- tolerate 80 or 100°C (~180F) heat
- doesn't emit toxic particle in contact with heat. (It would be use under bed sheet...)
- relatively cheap
ps: I was thinking to use the mosquito net buy insulating those wire using heat-schrink tubing but I'm not sure they could stand the 80°C heat from the wire, and about toxic emissions.
ps2: notice that it's not a safety related question, but a technical one (I'm looking for specific material).