JPS5943087A - Heat generating composition for warm bag - Google Patents

Abstract

PURPOSE:A heat generating compsn. for a warm bag having a quick rise in the initial heat generation and continued heat generating for a long time, which is obtd. by mixing at least two kinds of iron powders different in particle size or reactivity with active carbon, wood flour, neutral salt soln., etc. CONSTITUTION:At least two kinds of iron powders selected from an about 50- 200 mesh coarse iron powder and an about 200-mesh or finer iron powder are mixed, or at least two kinds of iron powders selected from reactive and non- reactive ones are mixed. The iron powder mixture is mixed with active carbon, wood flour, neutral salt soln., etc. to prepare the purpose compsn. when the heat generating compsn. is packed in a bag having adequate permeability, a warm bag is obtd. which has a quick rise in initial heat generation because the fine or highly reactive iron powder reacts at first, and the heat generation continues for a long period because the coarse or less reactive iron powder gradually reacts subsequently.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a heat-generating composition for a heating bag that warms the human body using iron powder, salts, activated carbon, and other composites as heat sources that generate heat through the intervention of water and oxygen. This invention relates to the improvement of.

Conventionally, activated carbon is completely mixed with iron powder, and metal halides (Na c, 1・Kc,...!, ca cA,
・F4 cj, -F 4 c J s・Ml 11.
1x・Aj c j * etc.) and metal sulfates (Na, tt
o, *K, go, 1F4 (go,), life F4go, 11Mggo.

A heating bag is already known in which a composition containing an aqueous solution of (1), etc.) is stored in the bag and heat is generated by introducing air, but such a heating bag was manufactured with the expectation of a long-term heat generation effect. Those that have been developed have the disadvantage that the initial rise of heat generation is inevitably slow, and on the other hand, if you try to make the rise of heat generation faster, the duration of heat generation becomes shorter. However, it was difficult to achieve both.

The present invention was invented to solve these problems and to provide a heating bag which has high reactivity, has a quick initial rise in heat generation, and is capable of sustaining heat generation for a long time.

Table 1 below shows a comparison between the product of the present invention and the conventional product. The following table shows the results of a comparative measurement with a conventional product by mixing each of the unexploded crystals shown in Figure 4 and placing them in an aerated bag covered with four layers of towels from the top and bottom.

Table 2 above. As is clear from the comparative measurements of the present invention'1
The product started generating heat at 51℃ after 10 minutes, but the temperature was high.
Moreover, even after 15 hours, the temperature was 40°C, 211.

The high temperature of 35°C is maintained even after 0 hours, and the present invention only changes the mixing ratio of fine iron powder, which lowers the initial temperature of the conventional product. This is an invention that can be expected to have excellent effects in a short period of time. Patent applicant: Nashij Oka Co., Ltd. Agent
Manjuo Minamino 1

Claims (1)

[Claims] (1) In a heating bag made by adding a solution of neutral salts to a powder made by adding wood flour and a water retention agent to iron powder and activated carbon, and sealing the mixture in a bag with appropriate air permeability, A heat-generating composition for a heating bag, characterized in that it is a mixture of two or more types of iron powder and iron powder with small particle size, or a mixture of two or more types of iron powder with high reactivity and iron powder with low reactivity.