| 摘要 |
PROBLEM TO BE SOLVED: To provide a sheet-form heating element wherein a heating composition is held under a stable state, and also, which can be used by cutting into an optional shape or size. SOLUTION: On the upper surface of a sheet-form article 3 comprising paper or a nonwoven fabric having air permeability and water absorbing property, a heating composition 2 in which a resin having a heat-melting property is mixed, and which heats under the existence of air, is held, and on the upper layer, a sheet-form article 1 comprising paper or a nonwoven fabric having air permeability and water absorbing property is superposed, and after they are formed into a sheet-form by a heat-compression by a heat-compressing machine, water or an inorganic electrolyte solution is infiltrated, and the heating composition 2 is held under a stable state, and at the same time, the sheet-form heating element can be used by cutting into an optional shape or size, and the usability is greatly favorable.
|
