| 摘要 |
PURPOSE: A heating agent composition is provided to raise the temperature of a heating agent to 90°C or greater without the use a plurality of heating agents and to maintain the temperature for at least 20 minutes. CONSTITUTION: A heating agent composition is prepared by mixing aluminum powder and exothermic materials. Calcium hydroxide powder and sodium hydroxide powder are included as an exothermic reaction compound. The composition comprises 35~55 weight% of aluminum powder, 30~50 weight% of calcium oxide powder, 3~15 weight% of calcium hydroxide powder, and 3~15 weight% of sodium hydroxide powder. The aluminum powder has an Al metal purity of 99.8% or more, an apparent density of 0.7-1.2 g/cm^3, and a particle size distribution of 250-350 mesh.
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