JPH11239585A - Disposable body warmer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disposable body warmer with the excellent effect of warming a body. SOLUTION: In this disposable body warmer composed by housing a heat generating composition whose main body is iron powder in an air permeable bag, a highest temperature is equal to or below 50 deg.C and the fine powder of a pyroelectric material is contained in the heat generating composition. As the fine powder of the pyroelectric material, tourmaline fine powder is preferable. For the content of the pyroelectric material in the heat generation composition, 0.05-10 wt.% is preferable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a heat-generating composition mainly composed of iron powder, which is filled in a bag made of a breathable sheet.
It relates to a so-called disposable body warmer.

[0002]

2. Description of the Related Art Conventionally, a heat-generating composition mainly composed of iron powder is filled in a gas-permeable bag made of a gas-permeable sheet, and the bag is stored in a gas-impermeable packaging bag. Disposable warmers are well known. In using the body warmer, the air-impermeable packaging bag is broken, the air-permeable bag filled with the exothermic composition mainly composed of iron powder is taken out, and the iron powder is brought into contact with air. The iron powder is oxidized by the contact with the air to generate heat. There are various uses for warming the body with this disposable body warmer. For example,
They warm their hands and body by putting them in clothes pockets, warm their feet by putting them in shoes, and warm their bodies by putting them between underwear. Further, an adhesive is applied to one surface of the breathable bag, and the adhesive is adhered to underwear or the like using the adhesive to warm the body.

[0003] In addition, patients with peripheral circulatory insufficiency suffer from coldness and often use disposable warmers. However, since their temperature sensing ability is poor, there is a risk of causing low-temperature burns due to disposable warmers. This is also true for the elderly. Therefore, disposable warmers having a low maximum temperature have been proposed. However, disposable warmers having a low maximum temperature have a problem that the body does not warm as desired, that is, the heating effect is poor. An object of the present invention is to provide a disposable body warmer having an excellent heating effect even when the maximum temperature is low.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a disposable body warmer in which a heat-generating composition mainly composed of iron powder is housed in a breathable bag, wherein the maximum temperature of the heat-generating composition is 50 ° C. or less. A disposable body warmer characterized by containing a fine powder of a pyroelectric substance. As the fine powder of the pyroelectric substance, tourmaline fine powder is preferably used.
Further, the content of the pyroelectric substance in the exothermic composition is 0.05 to
10% by weight is preferred.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The disposable body warmer according to the present invention comprises a heat-generating composition containing iron powder as a main component and mixed with activated carbon, wood flour, salt, water and the like, and is provided with a breathable material such as nonwoven fabric, woven fabric, and paper. A bag made of a sheet is filled, and the whole bag is stored in an air-impermeable packaging bag. The shape and size of the air-permeable bag are arbitrary, but are usually rectangular and each side is 5
２０20 cm. In addition, disposable warmers that can be pasted, apply adhesive on one side of the breathable bag and provide an adhesive layer,
Release paper is stuck on it.

In the present invention, a pyroelectric substance is contained in the exothermic composition of the disposable body warmer. The pyroelectric substance used here is a substance exhibiting pyroelectricity (pyroelectricity or pyroelectricity), and is, for example, a pyroelectric mineral such as tourmaline or pygmy ore. Of these, tourmaline, a type of tourmaline, is preferred. Examples of tourmaline include drabite (magnesium tourmaline), shawl (iron tourmaline), and elbaite (lithia tourmaline). These are water-insoluble substances. The pyroelectric substance is pulverized with a ball mill or the like to make a fine powder and mixed at the time of preparing the exothermic composition. The average particle diameter of the fine powder of the pyroelectric substance is preferably 1 to 100 μm. The content of the pyroelectric substance in the exothermic composition is 0.05 to 10% by weight.
Is preferred. Even in a very small amount of 0.05 to 0.5% by weight, the effects described below are exerted.

[0007] Pyroelectric substances have unique electrical properties, and when pyroelectric substances are present near the human body, they have characteristics that have a favorable effect on the human body, such as blood promotion. The present invention
Utilizing the characteristic of disposable warmers that are used close to the human body, by mixing pyroelectric substances in the heat-generating composition of this disposable warmer, the disposable warmer can be used during use. An electric substance is made to act on the human body.

That is, the pyroelectric substance is mixed with the heat-generating composition of the disposable body warmer so that the pyroelectric substance promotes the blood of the human body when the body warmer is used. Therefore, even when the temperature of the disposable body warmer is relatively low, the same heating effect as when the temperature of the body warmer is high can be obtained by the action of the pyroelectric substance such as blood promotion to the human body. In addition, the pyroelectric substance has a property of improving its electrical characteristics as the temperature rises. When the pyroelectric substance is included in the heating composition of the body warmer, the temperature of the pyroelectric substance also rises due to the heating of the body warmer, so that it more effectively acts on the human body.

Further, in the disposable body warmer of the present invention, when used, the fine powder of the pyroelectric substance mixed in the heat-generating composition rises in temperature due to the heat generation of the heat-generating composition. The increase in temperature contributes to the enhancement of the formation of the electric field by the pyroelectric substance, which has a positive effect on the human body.
Further, when tourmaline is used as a pyroelectric substance, it has a characteristic of radiating far infrared rays, and this far infrared rays also have a favorable effect on the human body. It is presumed that the use of the disposable body warmer of the present invention is effective in relieving chilliness and stiff shoulders because blood circulation is improved by the above-mentioned action.

In the disposable body warmer of the present invention, since the pyroelectric substance mixed in the thermal composition has the above-mentioned action, even if the surface temperature is lower than that of a normal disposable body warmer,
The effect of warming the human body, that is, the heating effect is excellent. Therefore, even if the maximum temperature of the disposable body warmer is lowered, the heating effect is not reduced. Maximum temperature of disposable body warmer is 7
It is regulated to 0 ° C. or lower (JIS S4100), and is usually set to 60 to 70 ° C. However, the disposable body warmer of the present invention has a maximum temperature of 50 for the above-mentioned reason.
Even if the temperature is lower than ℃, a sufficient heating effect can be obtained.
In the disposable body warmer of the present invention, the maximum temperature is 40 to
The temperature is 50C, preferably 45-50C. Maximum temperature is 4
A temperature of 0 ° C. or lower is not preferable because the temperature of the pyroelectric substance does not reach a temperature sufficient to act on the human body.

The temperature at the time of use of the disposable body warmer varies depending on the use condition. For example, at bedtime, the maximum temperature may be higher than the set maximum temperature, and the strength of the skin also varies among individuals. Therefore, set the maximum temperature of the disposable body warmer as low as possible within the range where the heating effect is satisfied,
Care has been taken to prevent low-temperature burns. As described above, the disposable body warmer of the present invention has an excellent effect of heating the human body even when the maximum temperature is set to 50 ° C. or lower, which is lower than that of a normal disposable body warmer. For this reason, the disposable body warmer of the present invention can reduce the risk of low-temperature burns, and is of course extremely suitable for heating the human body of peripheral circulatory insufficiency patients and elderly people, as well as ordinary people.

That is, although patients with peripheral circulatory insufficiency suffer from coldness, the use of disposable warmers poses a risk of low-temperature burns due to poor temperature sensing ability, and their use requires caution. This is the same for the elderly. Since the maximum temperature of the disposable body warmer of the present invention is set to a low temperature of 50 ° C. or less, the risk of low-temperature burn can be reduced. The effect can be exhibited. Therefore, the disposable body warmer of the present invention is particularly suitable for use in patients with peripheral circulatory failure and the elderly.

The maximum temperature of the disposable body warmer referred to in the present invention is the maximum temperature measured according to the test conditions and procedures of JIS S4100. The maximum temperature of the cairo can be easily adjusted by adjusting the total amount of the heating element, adjusting the mixing ratio of the heating element, or adjusting the air permeability of the gas permeable film of the container.

[0014]

EXAMPLES Example 1 25 parts by weight of a 13% strength saline solution, 5 parts by weight of activated carbon,
10 parts by weight of wood flour and 0.1 part by weight of drabite (magnesite tourmaline) having an average particle diameter of 10 μm were mixed well. To this mixture was added 60 parts by weight of iron powder in the absence of oxygen and mixed well to prepare an exothermic composition. This exothermic composition was filled into a 15 cm long, 10 cm wide air-permeable bag made of non-woven fabric and sealed. Finally, wrap this bag in an impermeable packaging bag,
The disposable body warmer of the present invention was obtained. The maximum temperature of this disposable body warmer was 48 ° C.

Comparative Example 1 25 parts by weight of a 13% sodium chloride aqueous solution, 5 parts by weight of activated carbon and 10 parts by weight of wood flour were well mixed. To this mixture was added 60 parts by weight of iron powder in the absence of oxygen and mixed well to prepare an exothermic composition. Vertical 1 made of this non-woven fabric
It was filled into a 5 cm, 10 cm wide breathable bag and sealed.
Finally, the bag was wrapped in an air-impermeable packaging bag to obtain a disposable body warmer of the present invention. The maximum temperature of this disposable body warmer was 48 ° C.

Comparative Example 2 23 parts by weight of a 13% strength saline solution, 26 parts by weight of activated carbon and 4 parts by weight of wood flour were well mixed. 47 parts by weight of iron powder was added to this mixture in the absence of oxygen, and the mixture was mixed well to prepare an exothermic composition. Vertical 1 made of this non-woven fabric
It was filled into a 5 cm, 10 cm wide breathable bag and sealed.
Finally, the bag was wrapped in an air-impermeable packaging bag to obtain a disposable body warmer of the present invention. The maximum temperature of this disposable body warmer was 55 ° C.

The disposable body warmers of Example 1, Comparative Example 1 and Comparative Example 2 were used by four male subjects for each body warmer. The places of use were the knees of both feet, the center of the waist, and the left waist. Then, the body temperature rise of the subject 30 minutes after use was thermographically photographed (the photographing temperature range was 28.0 to 3).
5.68 ° C. range). The measurement was made at three locations: the foot, the upper body, and the upper body of each subject. Table 1 shows the results. The temperature (° C.) in Table 1 is an average value of four subjects. The room temperature of the measurement room was 24
° C and relative humidity were set to 28.

[0018]

[Table 1]

As can be seen from Table 1, when the disposable warmer of Example 1 was used, the body temperature rise was better than when the disposable warmer of Comparative Example 1 containing no dravite was used. In addition, the maximum temperature of the disposable body warmer of Example 1 is 55 ° C., although the maximum temperature is 48 ° C.
The body temperature rise is superior to the case where the disposable body warmer of Comparative Example 2 is used. As described above, it is considered that the increase in body temperature when the disposable body warmer of Example 1 is used is caused by the blending of dravite.

[0020]

According to the disposable body warmer of the present invention, since a pyroelectric substance is present in the body, the pyroelectric substance acts on the human body when warming the body as a warmer, improving blood circulation and warming the body. To amplify. Further, since the pyroelectric substance has a greater effect on the human body as the temperature rises, it can be used very effectively. And since the pyroelectric substance acts on the human body, it exerts a heating effect even when the maximum temperature of the warmer is as low as 50 ° C or less, so it can be used for patients with peripheral circulatory insufficiency and elderly people who are susceptible to low-temperature burns with disposable warmers. It is suitable.

 ──────────────────────────────────────────────────続 き Continued on front page (72) Inventor Katsunori Nakaya 1 Nishiyama, Itabashi-cho, Ryugasaki-shi, Ibaraki Okamoto Co., Ltd.

Claims (3)

[Claims] 1. A disposable body warmer in which a heat generating composition mainly composed of iron powder is housed in a breathable bag, the maximum temperature of which is 50
A disposable body warmer having a temperature of not more than ° C and a pyroelectric substance fine powder contained in said exothermic composition. 2. The disposable body warmer according to claim 1, wherein the pyroelectric fine powder is tourmaline fine powder. 3. The composition of claim 1, wherein the content of the pyroelectric substance in the exothermic composition is 0.
The disposable body warmer according to claim 1, wherein the amount is from 0.05 to 10% by weight.