Where to buy hot water bags

The liquid in the hand warmer is a supersaturated solution, the actual composition is unknown. When the case of turning the metal sheet, in fact, is the use of friction to remove the supersaturated solution is not stable "smooth" situation, so that the aqueous solution on the surface of the metal sheet to produce a fine source of energy and rapid growth, depletion of the solution of the amount of concentration of the substance in the over-saturated part, until the aqueous solution into the smooth saturation, this process is To exothermic reaction. This is the principle of hand warmers.

Electric hot water bag factory in knowing the working principle of the hand warmer after, many people will ask how to exhaust hand warmer? The next step is to understand the specific operation process. Hand warmer charging port on the side of a plastic hole, the inside is a piston rod, the piston rod pulled down, carefully pull, followed by a gradual pressure squeeze until the gas is all exhausted to do.