Silicone hot water bag

Already to the most severe cold conditions of the year, a lack of attention to warmth will be drilled out of an eczema, electric hot water bag is a weapon against cold and frost in winter, the battery charge a few minutes, warm for several hours. Lovely warm baby inside the gurgling liquid is what? Why hot water bags  ten brands charging for a while to be able to insulate and keep warm for so many years? Is there a risk of explosion?

What is the liquid in the electric hot water bag?

The liquid in the electric hot water bag is an oversaturated salt solution, the general application of sodium acetate. Then what is the supersaturated solution? To use an analogy, when at room temperature, you have been in a certain amount of water constantly put salt, when the added salt will not melt again, it will have reached saturation, this type of solution is called saturated state solution. When the concentration value of the solution exceeds the concentration value of its saturated state solution, this type of solution is called a supersaturated solution.