Abstract: Provided is a method for efficiently producing products having good heat generation performance without reducing the production speed by delaying or preventing the start of heat generation of heat-generating compositions/heating elements during production or before sealing to an outer bag. Provided is a production method capable of avoiding unevenness of a heat-generating compositions in a bag/container or formation of a portion not filled with heat-generating compositions. A method for producing a heating element including a heat-generating composition that generates heat upon reaction with oxygen in air includes encapsulating a heat-generating composition precursor including a mixture containing a water-insoluble component of the heat-generating composition in an air-permeable bag/container formed of a water-permeable packaging material at least in part.

Abstract: A means can be used instead of or with conventional temperature control to achieve warming device temperature control at a lower cost, prevent or reduce deterioration of a warming device over time, and lower generated heat temperature due to storage at high temperatures. The warming device can be used for the same. A higher level temperature control means can be used for warming devices for medical applications. An improved warming device can be used for medical applications with a high level of safety and efficacy. A temperature control agent controls a maximum temperature of a warming device with a heat generating composition that generates heat by reaction with oxygen. Said agent includes an aliphatic compound that has a particle form that will not pass through a standard sieve with a #60 mesh, a melting point of 35-65° C., and an aqueous solubility (g/100 mL) at 20° C. of ?5.

Abstract: A means for controlling the temperature of a warming material includes an air-permeable film or the like. The warming material includes the temperature control means and a heating composition. The temperature control means for controlling the heating temperature of the warming material includes one or more aliphatic compounds that have a melting point of 35-65° C. and a solubility in water (g/100 mL) at 20° C. of 5 or less.

Abstract: The present invention is concerned with an indicator material which is obtained by impregnating a non-woven fabric, of which one surface is provided with a resin layer having a partly or wholly colored surface, with a volatile oily substance used as an active ingredient in a deodorant, an aromatic agent, an anti-fungal agent or a mothproofing agent, and which is used for showing the degree of dissipation of the oily substance which occurs with the passage of time, based on the shifting of the resin layer observable from the non-woven fabric side from a visible state to a state masked by the non-woven fabric, the indicator material overcoming a failure of conventional indicator materials containing non-woven fabrics in relatively clearly showing the degree of the oily substance with the passage of time, by using a non-woven fabric containing a fine-denier fiber having a size of 2 denier or less or by using a non-woven fabric having a partly altered density.