Heat source and heating device

Abstract

The heat source 1 comprises a bag 10 and a heat-generating composition 20 containing aluminum powder and calcium oxide powder, packed in the bag 10 . The bag 10 is formed by a packing material made of a base material of nonwoven fabric of which one surface is coated with a watertight layer. The packing material being punctured with a plurality of pinholes and has a water permeable rate of 45 to 310 milliliter/min/1 cm 2 measured when head of water is 27 cm. The heat source 1 can satisfy preferable temperature conditions including rate of water temperature rise, risen temperature of the water, duration of the risen temperature of water, rate of vapor temperature rise, risen temperature of the vapor and duration of the risen temperature of vapor under conditions in which a heating device is conventionally used. Accordingly, a heat source capable of causing a rapid and stable heat-generating reaction and a heating device using the heat source can be provided.

1 . A heat source comprising a bag and a heat-generating composition containing aluminum powder and calcium oxide powder, packed in said bag,
 wherein said bag is formed by a packing material made of a base material of nonwoven fabric of which one surface is coated with a watertight layer, said packing material being punctured with a plurality of pinholes and   said packing material has a water permeable rate of 45 to 310 milliliter/min/1 cm 2  measured when head of water is 27 cm.   
   
   
       2 . A heating device comprising:
 a heat source according to  claim 1 ;   a container having an exhaust vent and   water for activating a heat-generating reaction,   wherein said heat source is put in said container together with a subject to be heated, said water is added to said container to be reacted with said heat source and the subject is heated by the generated heat.   
   
   
       3 . A heating device according to  claim 2 ,
 wherein said subject is attached to the lid mounted at the upper portion of said container and is heated by water vapor produced by evaporating said water.