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Product Features:
Item: Instant Reusable Heat Pack Hand Warmers
Material: PVC + liquid + metal sheet
Size and Logo : Customized size logo
Color: Customized.
Printing: silk-screen
Instant Reusable Heat Pack Hand Warmers are made with PVC material and filled with supersaturated sodium acetate solution. Because the concentration of the supersaturated solution is too high, it is not stable. When we distort the metal sheet inside, the slight vibrations are sufficient to crystallize the solute and turn it into a more stable solid. This process is exothermic, so warming handbags began to warm up.
Hand Warmer can be recycled. As long as it is put in boiling water and heated for about 10 minutes, the condensed solutes will re-dissolve. This is due to the increased solubility of solute at high temperatures. During solubilization, the solute undergoes an endothermic reaction and becomes a supersaturated solution again.
Usage of warmer pack:
Packing&Delivery
Packaging Detail: Standard exported carton
Delivery Details: As your quantity and request