Last century last phase, PTC were applied as far back as above the body product right away already small home appliance in a series in our life generating heat. For example: Thermos cup, set, coffee pot, electric heat preserving heat open the kettle, the suit kettle, dry shoe implement, electrical blanket etc.The body generating heat includes PTC with whose proper merit: Constant temperature fever heat need not add additional the temperature turning the ware, fury, the temperature upside down to let the liquidtrickle out but adjustment, life time grow arbitrarily, more and more muchly times beginn- ing applying to the material generating heat being indicating one kind of new model a few home appliance product above in our daily life.