JPH0668035B2 - Far-infrared radiator having hygroscopic and deodorant properties - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) In the present invention, the corresponding temperature range of the irradiated object is −80 to 100.
TECHNICAL FIELD The present invention relates to a highly efficient far-infrared radiator that can be used at 0 ° C., and particularly to a sheet-shaped far-infrared radiator having a hygroscopic property and a deodorizing property used for an inner wall of a refrigerator, a bedding sheet, and the like.

(Prior Art) A substance is composed of molecules having a unique structure, and each molecule constantly vibrates periodically. The frequency of this molecule is peculiar to a substance, and when an electromagnetic wave with the same frequency as this (eg, infrared rays, far infrared rays) hits the substance, the energy of the electromagnetic wave is absorbed, and the amplitude of the molecular vibration becomes large. , The frictional heat between molecules is generated and the substance temperature rises.

In particular, far infrared rays having a wavelength in the range of 5 to 25 μm are absorbed by water molecules. Therefore, when the far infrared rays are applied to a substance having water, the water molecules absorb the far infrared rays and further resonate to increase the amplitude. Therefore, the internal temperature of the substance can be raised by the frictional heat between water molecules.

A material that emits far infrared rays to raise the internal temperature of a substance having moisture is called a far infrared radiator, and is made of a ceramic material that emits far infrared rays. As a far-infrared radiator, conventionally, there is a composite sintered body obtained by adding clay to an oxide of a transition metal element. The far-infrared radiator made of a composite sintered body has excellent infrared radiation characteristics, but has drawbacks such as low mechanical strength and low impact resistance. Therefore, a molded product in which a ceramic material that emits infrared rays is mixed with a synthetic resin and molded into an arbitrary shape has been developed.

For example, Japanese Patent Laid-Open No. 63-270787 proposes a sheet-shaped far-infrared radiator formed by mixing a ceramic material powder that radiates far-infrared rays with synthetic rubber. Ceramic materials used for this far infrared radiator include natural inorganic substances such as silica stone and kaolinite; metal hydroxides such as aluminum hydroxide and magnesium hydroxide; and hydrates thereof; ferrous oxide, Various materials such as metal oxides such as cupric oxide are mentioned.

(Problems to be solved by the invention) However, in general, a molded body formed by mixing a synthetic resin or synthetic rubber with a ceramic material has a far-infrared radiation substance content smaller than that of the composite sintered body, and thus is radiated. At present, the amount of far-infrared radiation is small, and a sufficient far-infrared radiation effect cannot be obtained.

Although it is possible to obtain a satisfactory far-infrared radiation effect depending on the type of combination of ceramic materials, it is not clear what combination is suitable, and trial and error is a major factor.

Even if a radiator having a far-infrared radiation effect is obtained, when it is used for a bedding sheet or an inner wall of a refrigerator, there are the following problems.

That is, the far-infrared radiation effect can activate moisture in the irradiated body to bring about a heat retaining effect on the irradiated body. However, since the synthetic resin, which is a dispersion medium of the ceramic material, is generally hydrophobic, the bedding sheet is used. In this case, the human body to be irradiated may have a so-called unpleasant sensation, or moisture may be saturated in the refrigerator to cause dew condensation or mold.

The present invention has been made in view of such circumstances,
It is an object of the invention to provide a far-infrared radiator having a moisture activating ability which is satisfactory as a radiator, and having hygroscopicity and deodorizing ability.

(Means for Solving the Problem) The present inventor has found that the far-infrared radiation effect is promoted by coexisting a substance that generates magnetic field lines with a far-infrared radiation substance, and has completed the present invention. .

That is, the far-infrared radiator having hygroscopicity and deodorizing property of the present invention is 5 to 40 parts by weight of porous far-infrared emitting material having a wavelength range of radiated infrared rays of 3 to 500 μm and 100 parts by weight of synthetic resin, And 3 to 20 parts by weight of a metal oxide having a magnetic flux density of 200 to 2000 gauss.

(Function) Far-infrared rays in the range of 5 to 25 μm emitted from the far-infrared radiation substance are absorbed by water molecules in the irradiated body, which activates the molecular motion of the water molecules in the irradiated body. On the other hand, the magnetic metal oxide imparts magnetism to water molecules and enhances the ionization tendency of water molecules. Therefore, when these substances coexist, the activation of water is further enhanced by the synergistic effect of far infrared rays and magnetic lines of force, and the surface tension of water can be reduced. As a result, for example, dew condensation is prevented.

Further, since the far-infrared emitting material used in the present invention is porous, it itself has deodorizing and hygroscopic properties, and excess moisture of the irradiated object (for example, saturated moisture cannot condense). Absorbs moisture existing on the surface of the irradiated body.

Therefore, according to the radiator of the present invention, in addition to effectively increasing the internal temperature of the object to be irradiated, by absorbing the excess moisture generated due to the decrease in the surface tension of moisture, the radiator is comfortable with humidity adjustment. It is possible to prevent heat retention, and further prevent generation of mold or the like caused by excess water. In particular, in the present invention, the far-infrared emitting substance itself also plays the role of a hygroscopic agent, so that the above-mentioned comfortable heat retaining property can be obtained without further adding a hygroscopic agent or deodorant.

(Example) The far-infrared radiation material used in the present invention is a porous natural inorganic material or far-infrared radiation ceramics or the like having a radiation infrared wavelength range of 3 to 500 μm. For example, Otani stone, zeolite, diatomaceous earth, etc. are used.

These far-infrared radiation materials emit far-infrared radiation and, at the same time, have both hygroscopicity and deodorization due to their porosity.

Of these substances, a substance whose emitted far infrared rays fit the absorption wavelength range of the object to be irradiated may be appropriately selected. Since the wavelength band of infrared rays absorbed by the irradiation target varies depending on the surface temperature of the irradiation target, the corresponding temperature range of the irradiation target is set to −80 to 100 ° C., and the irradiation target is set in the temperature range. Far infrared radiation is selected to emit wavelengths that match the absorption wavelength band. These substances may be used alone or in combination of two or more.

Of the above far-infrared emitting materials, it is preferable to use one having a particle size of 5 μm or less. If it exceeds 5 μm, segregation will occur due to the difference in specific gravity between the resin and the resin during kneading or molding with a synthetic resin, which may cause a radiator in which far-infrared emitting materials are not uniformly dispersed in the radiator. is there.

Further, the addition amount of the far infrared ray emitting substance is 5 to 40 parts by weight with respect to 100 parts by weight of the synthetic resin. If the amount is less than 5 parts by weight, the amount of far-infrared radiation substance is insufficient, and a sufficient radiation effect cannot be obtained. On the other hand, when it exceeds 40 parts by weight, it becomes difficult to mold the mixture of the synthetic resin and the magnetic substance.

As the metal oxide having a magnetic flux density of 200 to 2000 gauss, for example, ferrite having a high coercive force is easily and suitably used from the viewpoint of availability.

The particle size of the magnetic substance is preferably 5 μm or less for the same reason as in the case of the far infrared emitting substance.
This is because the far infrared ray emitting substance and the magnetic substance are uniformly dispersed in the resin so that the synergistic effect of the far infrared ray and the magnetic force line is effectively exhibited.

The amount of the above magnetic substance added is 3 with respect to 100 parts by weight of the resin.
~ 20 parts by weight. If it is less than 3 parts by weight, the synergistic effect cannot be obtained because the amount of the magnetic substance is insufficient. on the other hand,
If it exceeds 20 parts by weight, it becomes difficult to mold the mixture of the synthetic resin and the far infrared ray emitting material.

The synthetic resin used in the present invention can be appropriately selected depending on the intended use and application of the radiator of the present invention. Examples thereof include polyurethane, polyvinyl chloride, EVA, polyethylene, polyacrylonitrile and the like.

A far-infrared radiator having an arbitrary shape such as a film, a sheet, a plate or a container can be obtained by kneading and molding a predetermined amount of the far-infrared emitting substance and a magnetic substance in these resins.

By the way, as a resin, an olefin resin and a vinyl chloride resin are used as base materials, and 30 parts of ceramic powder SCR-3 (manufactured by Sanwa Sera Life Co., Ltd.) is used with respect to 100 parts by weight of the resin.
The sheet according to the present embodiment obtained by kneading and mixing 10 parts by weight of ferrite as a magnetic substance and 10 parts by weight of
Wavelength range 3 μm to 25 μm, spectral radiance 0.9 (mw · cm ⁻² · sr ⁻¹ · μm ⁻¹ ), maximum wavelength 10 at 20 ° C.
μm, emissivity 96% or more (measurer, Fukuyama University Infrared Engineering Laboratory).

Briefly explaining the above kneading and molding, for example, within 100 parts by weight of synthetic resin, within 40 parts by weight of far-infrared radiation material that emits far-infrared radiation that matches the absorption band of the irradiated object and within 20 parts by weight of magnetic material. In addition, the total amount of both is added within the range of 50 parts by weight, a small amount of the dispersant is further added, and the mixture is uniformly dispersed and mixed by a mixer (high speed mixer), and kneaded by a mixing roll or a kneading extruder. In the case of kneading with a mixing roll, square pellets are obtained with a sheet pelletizer, and in the case of kneading with a kneading extruder, cylindrical or spherical pellets are obtained. These pellets can be used as a raw material and molded into an arbitrary shape. Alternatively, instead of forming pellets, it may be directly kneaded with a resin and then directly formed into a sheet by using, for example, a calender roll.

In the above-mentioned forming process, a one-sided fabric or paper product can be obtained by laminating or topping with cloth or paper. It is also possible to stack a suitable number of the above-mentioned sheets into a plate shape by a press working method. Alternatively, a mat-like processed product may be obtained by sandwiching another synthetic resin sheet or a foamed sheet between the sheets obtained above and subjecting them to lamination press processing.

When forming a thin sheet-like material by extrusion molding or injection molding during the above-mentioned molding process, the total amount of far-infrared radiation substances and magnetic substances mixed and contained in the synthetic resin is determined by the synthetic resin. It is desirable that the amount is 25 parts by weight or less with respect to 100 parts by weight.

The far-infrared radiator having any shape such as the sheet shape, the mat shape, or the plate shape obtained as described above has the effect of far-infrared rays on the irradiated object due to the interaction between the far-infrared radiation substance and the magnetic substance. high. Further, since the far-infrared emitting substance is present on the surface of the molded body at a constant ratio, hygroscopicity and deodorizing property can be exhibited based on the porosity of the far-infrared emitting substance. Further excellent hygroscopicity and deodorizing property can be exhibited by knitting the far-infrared radiation substance on the surface of the molded body and molding. Therefore, by activating the moisture of the irradiated object to lower the surface tension, it is possible to prevent dew condensation and the like, and by absorbing excess moisture and adjusting the humidity well, in order to prevent the occurrence of mold and the like. It can deodorize unpleasant odors.

Incidentally, if the deodorizing effect and the moisture absorbing effect of the present invention are to be obtained by adding a hygroscopic agent and a deodorizing agent separately, the upper limit of the addition amount of the far-infrared radiation substance or the magnetic substance is affected in view of the molding processability. Which in turn will affect the far-infrared radiation effect itself. On the other hand, in the present invention, since the far-infrared emitting substance itself has moisture absorption and deodorizing effect, the addition amount of the far-infrared emitting substance and the magnetic substance can be appropriately selected within the range shown in the present invention, so that it is desired. There is an advantage that the far infrared radiation effect can be effectively obtained.

Next, a specific example of use of the far-infrared radiator having such characteristics will be described.

When a plate formed of the radiator of the present invention is used as the indoor material, it acts on water vapor existing in the room and adjusts the humidity satisfactorily. Therefore, dew condensation occurs when the plate formed of the synthetic resin alone is used. In addition, the generation of mold due to dew condensation and the odor caused by the generated mold disappeared.

When the plate material made of the radiator of the present invention was installed in the cold air outlet of the freezer (internal volume 2000 m ³ , freezing temperature -30 ° C), frost formation in the freezer could be prevented due to the effect of maintaining humidity and preventing dew condensation. Therefore, the labor cost and electricity consumption for the conventional defrosting work by hot air every two hours can be reduced.

Further, when the radiator of the present invention is used as the inner wall of the refrigerator, dew condensation of the radiator prevents dew condensation on the inner wall of the refrigerator, and moisture in the radiator deodorizes the humidity in the refrigerator. In addition to being suitably maintained, a bad odor can be prevented without setting a small deodorant in the refrigerator.

When it is used for a person to be irradiated, such as a bedding sheet or a shoulder pad, the human body has an infinite heating element (36 to 3).
7 ° C.), the body temperature is conducted to the sheet made of the radiator of the present invention, and the temperature of the sheet is raised to 36 to 37 ° C.
Far infrared rays corresponding to are emitted toward the human body and act on water in the human body, thereby warming the human body from the deep inside. Therefore, even when the outside air temperature is low, the body temperature can be stably maintained and the heat retaining property is improved. For example, wearing a general shirt of acrylic, nylon, and cotton mixed with a 550 cm sheet of the radiator of the present invention attached to the back surface and a shirt of the same material without the radiator of the present invention attached When body temperature was compared 10 minutes after wearing with thermography, a remarkable difference was observed in the surface temperature distribution of the back surface. That is, in the case of the shirt to which the radiator sheet of the present invention is attached, the temperature of the entire back surface is kept high without applying heat from the outside, and the effect of far infrared radiation is recognized. Further, the radiator of the present invention can promote blood circulation in the human body as an irradiated body by a synergistic effect with magnetic lines of force, and can effectively reduce stiff shoulders and stress. Further, due to the improved heat retention, the sheet made of the radiator of the present invention has a hygroscopic effect even if there is some sweating from the human body, so that there is no discomfort such as peeling and a comfortable heat retention is obtained. At the same time, the deodorizing effect has the effect of preventing body odor due to perspiration.

(Effect of the invention) Since the radiator of the present invention coexists a far-infrared radiation substance that emits far-infrared rays and a magnetic substance that generates magnetic field lines that promote the effect of far-infrared radiation, Due to the synergistic effect, the far-infrared radiation effect on the irradiated object can be enhanced. In addition, since a porous material is used as the far-infrared radiation substance, with the far-infrared radiation effect,
It also has deodorizing and moisture absorbing effects.

Therefore, the far-infrared radiator of the present invention can be used for products and the like that require far-infrared radiation effect and excessive moisture causes mold generation and discomfort, and can adjust comfortable temperature and humidity.

Claims (1)

[Claims] 1. A metal oxide 3 having 5 to 40 parts by weight of a far-infrared radiating substance having a wavelength range of radiated infrared rays of 3 to 500 μm and a porous material, and a magnetic flux density of 200 to 2000 gausses per 100 parts by weight of a synthetic resin. A far-infrared radiator having a hygroscopic property and a deodorizing property, which is characterized by containing 20 to 20 parts by weight.