Re: Original Post on Grenfell Tower
That post had been amended and appended and become quite long, and it unwittingly included a widely-published bit of misinformation, that the plastic filling in the panels was polyethylene, which could not possibly have evolved the cyanide gas that survivors were treated for, as is mentioned in some of the updates. It now turns out that the plastic filling was some variation on polyurethane or polyisocyanurate foam, which definitely would create cyanide. But it isn't yet totally clear that this is really what the plastic filling was, and lots of early reports said polyethylene (which would have to be have been in the form of fibre rather than foam.) The structural panels mentioned in the post ARE recycled polyethylene, but the tooling that makes them could be adjusted, via an appropriate mould-heating "profile" to use polypropylene or other plastics that might available in bulk as waste from some other process. It is also worth noting that if the (different) plastic us...