Patent ID: 7998183

Claim:
A heat generating body wherein three or more plural sectional exothermic parts are provided at intervals via a sectioned part which is a heat seal part, characterized in that: the sectional exothermic parts have a heat generating composition capable of causing heat generation upon contact with oxygen in air and are at least constituted of three kinds of a low temperature sectional exothermic part, a middle temperature sectional exothermic part and a high temperature sectional exothermic part; a maximum temperature of the high temperature sectional exothermic part is higher than a maximum temperature of the low temperature sectional exothermic part; a maximum temperature of the middle temperature sectional exothermic part is laid between a maximum temperature of the high temperature sectional exothermic part and a maximum temperature of the low temperature sectional exothermic part; and the middle temperature sectional exothermic part is constituted of plural sectional exothermic parts having a different maximum temperature.