JPH04221555A - Far infrared radiation body warmer - Google Patents

Abstract

PURPOSE:To enhance the effect of heating by radiation heat by far infrared radiation and to prevent occurrence of a low temperature burn by providing a light transmittable layer having a heat insulating ability so as to prevent heat conduction but transmitting radiation heat to a body warmer. CONSTITUTION:An endothermic compound 1 is composed of an oxidation promoting agent such as iron powder, a salt or the like, water, a water retentive agent such as activated carbon, wood powder, perlite or the like, a hydrogen generation restraining agent such as a water absorbing polymer, sodium metasilicate or the like, which are blended together. A heat resistant storage bag 2 is provided with an air permeability at its one or both surfaces so as to allow the endothermic compound to make contact with the atmospheric air so as to perform endothermic action. In the case of a film in which paper, unwoven fabric or the like is laminated thereover with a heat-fusible synthetic resin, several microholes 3 are formed with the film side being set inside. Further, a light transmittable heat resistant material 4 is formed on at least one side surface, and a transparent bag in which air is charged, made of polypropylene, polyethylene or the like, or urethane foam, foamed polystyrene which is hollowed out in a pattern is used.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a far-infrared warmer comprising a heating element storage bag containing a composition that generates heat in the presence of air, and a light-transmitting heat insulating layer provided on at least one side of the bag.

0002

[Prior Art] Conventionally, a heat-generating composition containing iron powder, an oxidizing aid, water, and a water retention agent such as activated carbon is sealed in a breathable storage bag, and the breathable storage bag is further sealed in an airtight bag. Disposable warmers are known. On the other hand, it is known that heating using far infrared rays can transmit heat to the inside of the object to be heated, allowing internal heating or uniform heating.
According to a 2016 NASA REPORT, far infrared rays of 8 to 14 μm are reported to have particularly good effects on humans. Many ideas have already been proposed for far-infrared warmers that combine far-infrared rays with a high heating effect and the above-mentioned warmers. For example, a body warmer is housed in a base fabric coated with far-infrared radiating material (Utility Model Publication No. 1-17285).
3), a heat generating composition provided with a far-infrared generating layer (Japanese Utility Model Application Publication No. 63-16384), and a heat generating material covered with a non-woven fabric made of fibers containing fine ceramic powder (Japanese Utility Model Application Publication No. 16384/1984). 63-182761), an attempt to provide a far-infrared ray generating layer in a storage bag, and an attempt to add ceramic particles to a heat-generating composition (Japanese Utility Model Publication No. 1-6964).

However, iron powder, water, wood powder, activated carbon, etc., which make up the majority of the heat-generating composition of disposable body warmers, are good far-infrared radiators at around room temperature (for example, all of the wood powder and water The emissivity is 96% and 94% of a blackbody, respectively, as stated in the Chemical Engineering Handbook 1988),
Furthermore, even if a certain type of ceramic exhibits the same emissivity as a black body, the emissivity will only increase by a few to 10% compared to the contents of the body warmer. The effect of far infrared rays is very small,
It seems that no substantial effect can be expected.

Furthermore, heating by far infrared rays is based on radiant heat, and far infrared rays are a type of electromagnetic waves similar to light, so far infrared rays cannot be expected to have any effect unless the electromagnetic waves directly reach the human body. In contrast, conventional disposable body warmers are worn on the body and heat the surface of the body using conductive heat rather than radiant heat, which not only does not produce the effect of far-infrared rays, but also causes low-temperature burns in some cases. It also has the problem of causing

[0005]

[Problem to be solved by the invention] The problem to be solved is that the effect of far infrared rays is not utilized in disposable body warmers, and there is a risk of low-temperature burns when trying to warm the inside of the body. The point is that it is expensive.

[0006]

[Means for Solving the Problem] The present invention has been made to solve the above-mentioned problems. By attaching a heat insulating layer to the body warmer, we have created a far-infrared body warmer that has a high heating effect using radiant heat, that is, far-infrared rays.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below with reference to the drawings. Figure 1
FIG. 2 is a perspective view of one embodiment of the far-infrared warmer of the present invention.
is a sectional view thereof. Further, FIGS. 3 and 4 show examples of heat insulating materials.

In the figure, numeral 1 represents an exothermic composition, which usually contains iron powder, an oxidation promoter such as salt, water, activated carbon and wood flour, a water retention agent such as perlite, a polymeric water absorbing agent, or sodium metasilicate salt. Hydrogen generation inhibitors are added. Furthermore, in order to increase the far-infrared emissivity, it is of course possible to add a substance having an emissivity close to that of a black body, such as zirconium, zeolite, or ceramics, and the present invention is not limited in any way to the composition of the exothermic composition. . It is often thought that only certain materials close to black bodies emit far-infrared rays, but the total emissivity of iron, water, wood powder, activated carbon, etc. at around room temperature is extremely high, and the spectral radiation characteristic curve When created, the radiation intensity of a disposable body warmer shows a pattern similar to that of a black body, so the body warmer itself is thought to emit a high rate of far-infrared rays, which are favorable to the human body.

[0009] Reference numeral 2 denotes a heating element storage bag for storing the exothermic composition 1, which has air permeability on one or both sides so that the exothermic reaction proceeds when the stored 1 comes into contact with air during use. There is. Materials for the heating element storage bag 2 include paper, nonwoven fabric laminated with a heat-adhesive synthetic resin film such as polyethylene or polypropylene, polyethylene, polypropylene, polyurethane having fine continuous pores on the surface and inside, or those. Examples include thermoplastic films made of plastics and rubbers that have been modified to be flexible. The former paper or nonwoven fabric laminated with a heat-fusible synthetic resin is usually formed with a large number of micropores 3 with the film side facing inside, and the size of the micropores 3 is as follows: It is appropriately determined in consideration of air permeability within a range in which the exothermic composition 1 does not leak out. Additionally, if necessary, a highly thermally conductive metal thin film can be laminated on the non-ventilated surface to increase the conductivity of the generated heat. On the other hand, the fine continuous pore film may be used alone, or may be laminated with a thin nonwoven fabric for reinforcement that does not impair the flexibility of the storage bag. In addition, impregnating the above materials with substances such as zirconium, zeolite, and ceramics that have an emissivity close to that of a black body,
May be applied. The thickness of the heating element storage bag 2 made of these films is appropriately selected in consideration of its physical properties, that is, breathability, tear strength, workability, feel, etc., but is usually 0.1 to 3 mm. Used within the range of

The present invention is characterized in that a light-transmitting heat insulating material 4 is provided on at least one side of the heating element storage bag 2. As the heat insulating material 4, a transparent bag made of polypropylene, polyethylene, etc. filled with air, or urethane foam, styrofoam, etc. cut out in a pattern is used. For example, commercially available air bags (Kawakami Sangyo) are cushioning materials for transportation that have air-filled convex portions (air caps) on the entire surface, and are preferable because they are transparent and have heat insulating properties. When using something strong and sealable like an air bag as a heat insulating material, use a normal breathable material on one side of the heating element storage bag 2 and use direct heat insulating material on the other side. A heating element storage bag may also be formed. Figure 3 shows an air bag (Kawakami Sangyo), and Figure 4 shows an example of urethane foam cut out in a pattern.

[0011] Since the far-infrared warmer of the present invention thus obtained is provided with a light-transmitting heat insulating material, the far-infrared light emitted from the disposable warmer is efficiently propagated to the human body by radiant heat, providing warmth. There is almost no need to worry about low-temperature burns caused by excessive conduction heat. Therefore, as well as normal use,
It is ideal for medical and therapeutic purposes, and is easy to use and inexpensive, without worrying side effects such as low-temperature burns.
Extremely practical.

[0012] In addition, hyperthermia therapy for cancer kills cancer cells by the thermal effect, but in order to exert the thermal effect more effectively, the temperature difference between the subcutaneous temperature and the surface temperature is made as small as possible. It is also necessary to raise the subcutaneous temperature to an effective temperature. With conventional methods, when attempting to raise the subcutaneous temperature to an effective temperature, the surface temperature also rises, leading to the risk of low-temperature burns, but with the far infrared warmer of the present invention, it is possible to heat deep under the skin without any side effects on the human body. possible,
The thermal therapeutic effect of far infrared rays can be highly expected.

[0013]

[Test Example 1] Warmers prepared in the same manner were divided into two groups, and one group was fitted with an airbag on one side. The air bag was installed by heat-sealing the air bag to the seal part of the body warmer. The other groups were used as controls. In order to investigate the effectiveness of the airbag equipped warmer (1),
(1) and a control body warmer were placed on the shaved abdomen of a rat, and the skin surface temperature and subcutaneous temperature were measured, and the temperature difference was determined when the surface temperature and subcutaneous temperature became approximately constant. . The results are shown in the table below.

────────────────────────
──
Temperature difference between surface and subcutaneous surface (℃)────────────
──────────────── Cairo (1)
1.3
contrast warmer
4.2──────────────────────
──────

(n=6)

When a control warmer was placed on the abdomen of a rat and heated, the subcutaneous temperature was 3 to 5°C lower than the rise in skin surface temperature;
When heating using
The temperature was small at ~2°C, and the effect of far-infrared heating was observed in Cairo (1).

[0016]

[Test Example 2] In the same manner as in Test Example 1, a hand warmer was placed on the shaved abdomen of a rat and heated for 1 hour so that the subcutaneous temperature reached 41 to 42°C.

──────────────────────────
────────
Subcutaneous temperature Surface temperature Burn incidence (%)────────────────────
────────────── Cairo (1)
41.4 42.6
0 Control warmer 41.
6 45.2 100───
──────────────────────────
──────

(n=3)

As shown in the above table, the surface temperature of the warmer (1) according to the present invention was only 1 to 2° C. higher than the subcutaneous temperature, and no burns were observed. On the other hand, in the control warmer, burns were observed in all rats due to the increase in surface temperature.

[0019]

Effects of the Invention The far-infrared warmer of the present invention has a light-transmitting heat insulating layer between the warmer and the body to which it adheres, so the warmer uses radiant heat rather than conductive heat. It has a characteristic that the heating effect, that is, the heating effect by far infrared rays is large. Therefore, there is almost no fear of causing low-temperature burns, and the present invention provides a far-infrared warmer that is useful not only for normal use but also for general medicine, treatment, and as a cancer treatment tool.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the invention.

FIG. 2 is a sectional view thereof.

FIG. 3 is an example of a heat insulating material used in the present invention.

FIG. 4 is another example of a heat insulating material.

[Explanation of symbols]

1. Exothermic composition 2 Heating element storage bag 3. Micropores 4 Insulation material

Claims (1)

[Claims] 1. A far-infrared hand warmer, characterized in that a light-transmitting heat insulating layer is provided on at least one side of a heating element storage bag containing a composition that generates heat in the presence of air.