Intro
Melting process and temperatures depend on the type of plastic.
For safety, people recommend face mask. I just hold breath however.
Another safety measure is googles. Eyes are very important.
Temperatures
Need to be careful to prevent overheating (burning).
Temperatures are as follows:
Polyethylene: 130-140 C
Ways to melt plastic
Heat gun
Good to bend hard plastic. Under heat gun, it becomes very flexible.
Iron
Good for plastic film (wrap).
Oven
Don't use the same oven as for cooking food. Plastic particles could be poisonous.
Fire
With fire, there should be a layer of additional metal can between fire and plastic per se. Otherwise plastic could burn.