| 摘要 |
PROBLEM TO BE SOLVED: To provide a heating element of a simple structure capable of preventing an abrupt lowering of a temperature of contents and keeping the contents within a temperature range suitable for drinking and eating for a specific time. SOLUTION: This heating element mounted on the bottom of a metallic can heated at 60°C in advance to keep the metallic can warm, keeps the temperature of contents at 40-60°C for 30 minutes in a room of 25°C. The contents of the heating element preferably include at least iron powder, water and sodium chloride by a weight ratio of 100:100-10:20-1. COPYRIGHT: (C)2005,JPO&NCIPI |
