Patent ID: 11944570
Assignee: KOBAYASHI PHARMACEUTICAL CO., LTD.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A chemical body warmer comprising a flat housing comprising one or a plurality of cells each containing an exothermic composition that generates heat upon contact with air, wherein a total area of the cell or the plurality of cells in a plan view of the housing is 200 cm2 or more, and the chemical body warmer is used by being placed under a blanket, wherein the chemical body warmer generates heat with a total heat generation factor (HGF) value calculated based on Equation (1) shown below that is 4.0×106° C.·min·cm2 or more:

total HGF value (° C.·min·cm2)=A×B,  [Equation 1], where:
A: an area (° C.·min) of a region of 40° C. or more in a graph of time (min, horizontal axis) against heat-generation temperature (° C., vertical axis) obtained by measuring a temperature characteristic in accordance with a method defined in JIS S4100-1996 in the Japanese Industrial Standards; and
B: the total area (cm2) of the cell or the plurality of cells in plan view.