Patent ID: 9671134
Date: 2017-06-06
CPC Classifications: A61F,F24V

Claim:
1. A vapor heating implement, comprising: an exothermic layer; a water-retention layer; and a bag containing the exothermic layer and the water-retention layer; wherein: the exothermic layer comprises an oxidizable metal, water, and a water-retention agent; the water-retention layer comprises a polymer; the bag is at least partially air permeable; a content of water in the vapor heating implement is 40 to 80 parts by mass per 100 parts by mass of the oxidizable metal; a content of the water-retention agent in the exothermic layer is 0.3 to 20 parts by mass per 100 parts by mass of the oxidizable metal; a content of water in the exothermic layer is 8 to 45 parts by mass per 100 parts by mass of the oxidizable metal; and a content of water in the water-retention layer is 15 to 30 mass % of a maximum water absorption of the water-retention sheet.