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Hand warmer is great demand in the winter, it is discarded after single use, which is not environmental behavior.
Design idea of Friction Heat-pack is taken from the"Friction means heat "concept.Therefore, The inner water bag put into generate electricity nanofibre cloth bags. When people wear it, cold hands unconsciously rub In order to keep warm, this action may be lets generate electricity nanofibre indirectly to generate electricity, electricity will be stored in environmentally paper battery.When you want warmth,you just turn on power and set temperature, it will become a winter partner and save resources of the product for offspring.
Shulin Dist., New Taipei City, Taiwan