| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a disposable body warmer which can be easily and cheaply produced at low cost, can prevent a leak of the heat generating composite powder in a bag and can omit the former sealing bag. <P>SOLUTION: The heat generating composite powder 5 is enclosed in the bag 4 made of a synthetic resin film having a top sheet 2 in which many vents 6 are bored and a leak prevention sheet 7 is disposed at the inside of the top sheet 2 to prevent the leak of the heat generating composite powder 5 through the vents 6. At the outside of the breathable sheet 2, a sealing sheet 8 to seal the vents 6 is pasted to be peelable. The bag 4 has the top sheet 2 and an airtight back sheet 3 and many vents 6 having the shapes of micro-pores or small orifices are formed in the range of the top sheet 2 excluding a peripheral section. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
