WO2014141319A1

WO2014141319A1 - Stress-reducing member for living body

Info

Publication number: WO2014141319A1
Application number: PCT/JP2013/001649
Authority: WO
Inventors: 佐野　昌隆; 宮松　宏樹; 吉田　貴美
Original assignee: 株式会社エルブ; 株式会社東洋クオリティワン
Priority date: 2013-03-13
Filing date: 2013-03-13
Publication date: 2014-09-18
Also published as: CN105073189A; JP5920906B2; JPWO2014141319A1

Abstract

The present invention addresses the problem of providing a stress-reducing member for a living body, said stress-reducing member being capable of relieving a living body from stress or the like. This stress-reducing member comprises: a composite inorganic material which comprises both a zirconium carbide substrate that carries a platinum particulate material on the surface and a colloidal silica adhesive layer interposed between the particulate material and the substrate; and a resin base material. The composite inorganic material is contained in the resin base material or adheres to the surface of the resin base material. The stress-reducing member is used either in contact with or near to a living body. As described in Example in detail, the stress-reducing member can effectively reduce the stress occurring in a living body (such as a human body). Although the stress reduction mechanism of the member is not clear, it is thought that the particulate material in the composite inorganic material can act effectively without being interfered by the substrate, because the particulate material is carried on the substrate in an exposed state.

Description

Biological strain relief member

The present invention relates to a living body tension alleviating member aiming to exhibit a relaxing effect when used in contact with or close to a living body.

In recent years, materials with new functions have been developed from various approaches. Among them, fine particles formed from noble metals such as platinum are known to exert a catalytic action. The inventors of the present application have succeeded in developing a material (composite inorganic material) that can sufficiently exhibit the effect of such a noble metal (Patent Document 1).

Reissue 2009/125847

The inventors of the present application discovered a relaxing effect on a living body by a noble metal in the process of developing a composite inorganic material, and developed a member utilizing the action effect.
The present invention has been completed in view of the above circumstances, and a biological tension relieving member that can relieve tension in a living body using a composite inorganic material that can add further effects when platinum or the like is supported on an inorganic material. Providing is a problem to be solved.

(1) The biological strain relief member that solves the above problems is characterized in that a particle material made of platinum, gold, silver, or palladium having a volume average particle diameter of 1 to 300 nm is the same as the particle material and the carbon particles. A substrate made of an inorganic material such as silica, alumina, zirconium carbide, zirconium oxide, titanium carbide, tungsten carbide, silicon carbide, and / or boron carbide supported on the surface of the particles and / or different particles; An adhesive layer made of colloidal silica interposed between substrates, and a composite inorganic material having
A resin base material containing the composite inorganic material and / or adhering to the surface and composed of a resin;
Have
It is to be used in contact with or close to a living body.

Although this living body tension alleviating member will be described in detail in the embodiments described later, it becomes possible to effectively relieve tension generated in the living body (for example, human body). Although the mechanism is not clear, the composite inorganic material described above is supported on the base material with the particulate material exposed, so that the action of the particulate material is effectively exhibited without being blocked by the base material. it is conceivable that. In addition, the effect is surely exerted if it is brought into contact with a living body, but the effect is exerted even if it is placed close to the body (in the case of being disposed through a cloth or a film or in a case of being disposed through a slight gap). It is thought to develop. This is because there is an electromagnetic wave (far infrared rays or the like) as one of the mechanisms involved in the expression of the effect.

When adopting the configuration of (1) above, one or more of the components described in the following (2) or (4) can be adopted. When the component (2) is employed, the component (3) can be further employed. When the configurations (1) to (4) are employed, the components described in (5) or (6) can be employed.

(2) The carbon particles have an average particle diameter of 100 nm or more and 3000 nm or less, are amorphous and amorphous, and are fixed to the surface of the base material by lanthanum boride. By setting the particle size of the carbon particles within this range, far infrared rays can be sufficiently emitted.

(3) The inorganic material is zirconium carbide, the surface of the carbon particles is coated, and the average particle size is larger than the carbon particles,
Lanthanum boride is contained in the vicinity of the site where the carbon particles and the substrate are in contact.
By using lanthanum boride in combination, carbon particles can be firmly bonded to the surface of the substrate without reducing far-infrared radiation.

(4) The base material is a particle having a volume average particle diameter of 2 μm or more. By adopting the fine particles as described above as the substrate, a composite inorganic material in which the particle material is uniformly dispersed on the fine particle substrate can be obtained. Since the composite inorganic material supports the particle material on the base material, the supported particle material does not agglomerate or the like, and is mixed or adhered to other materials by making it into fine particles. It becomes easy.

(5) The resin base material has a foam shape in which the composite inorganic material is held on the surface and / or dispersed therein, and is a soft foam. In order to give the composite inorganic material to the surface, it is desirable to attach or spread on the surface. The soft foam is a member represented by urethane foam or the like. Soft foam is used for beds, chairs, pillows, seats for vehicles such as automobiles, airplanes, trains and ships. A soft foam is a member that can be used to rest on it. The soft foam can be expected to exhibit a high effect in combination with the effect of the precious metal contained therein and the relaxation effect that the soft foam inherently has.

(6) The resin base material is in the form of a fiber that holds the composite inorganic material on the surface and / or is dispersed inside, and constitutes a cloth. In order to give the composite inorganic material to the surface, it is desirable to attach or spread on the surface. As the cloth used in contact with or in close proximity to a living body, application to clothing, bedding, chairs (backrest, cushion, etc.), carpet, wallpaper, etc. can be considered. It can be expected that a relaxing effect is always exhibited by using such a member that exists on a daily basis.

The living body tension relieving member of the present invention can exert a high relaxing effect on the living body due to the synergistic effect of the noble metal and the ceramic.

It is the graph which examined the influence (VAS variation | change_quantity average value) on the biological body (human body) of the mattress in an Example. It is the graph which examined about the influence (POMS fatigue score variation | change_quantity average value) on the biological body (human body) of the mattress in an Example. It is the graph which examined about the influence (chromogranin A change rate average value) to the biological body (human body) of the mattress in an Example.

(Biological strain relief member)
The living body tension relieving member of the present invention will be described in detail based on the following embodiments. The living body tension alleviation member of this embodiment has a composite inorganic material and a resin base material. The living body tension relieving member of this embodiment is used in contact with or close to the living body. Here, “adjacent” includes an aspect in which a gap is used and used near the living body, and an aspect in which the living body is contacted via a space or a thin member (cloth, film, thin plate, etc.). The electromagnetic wave generated from the noble metal can reach the living body even through the cloth. In addition, if the member has a large number of holes, such as a cloth, the generated ions and the like sufficiently reach the living body.

The biotension alleviation member of this embodiment can be expected to be applied to a soft foam or cloth. In order to apply to a soft foam, a resin base material is molded into a foam shape to give cushioning properties. The particulate material is attached to the surface of the resin substrate or dispersed inside. The obtained soft foam can be used for a bed mattress, a pillow, a sofa, a chair, a cushion for a vehicle such as an automobile, an airplane, a train, and a ship, and a sound absorbing material.

In order to apply to cloth, the resin base material can be made into a fiber shape, and the particle material can be adhered to the surface of the resin base material or contained in the fiber. A fabric can be obtained from the fibers. In addition to the method in which the composite inorganic material is attached or spread on the surface of the fiber, a method in which the composite inorganic material is attached or spread after forming a cloth can be employed in addition to the method in the fiber state. In order to make a cloth from a fiber, it can be made into a woven fabric or a non-woven fabric. The obtained cloth can be applied to clothes, bedding (duvet cover, mattress cover, pillow cover, etc.), wallpaper, carpet, chair, sofa, shoes, slippers, and car seat covers such as automobiles, airplanes, trains and ships. .

-Composite inorganic material and its manufacturing method The composite inorganic material used for the biological tension relaxation member of this embodiment can employ | adopt a silica and an alumina as a base material. These inorganic materials are excellent in physical stability. Further, when a carbide such as zirconium carbide (titanium carbide, tungsten carbide, silicon carbide, boron carbide, etc.) is employed, it can be suitably used for applications in which temperature is controlled such as rapid heating, heat retention, and cooling. These carbides can conduct heat energy effectively.

Also, by adopting zirconium oxide as the base material, the performance of the supported particulate material can be exhibited without adversely affecting the applied target.

Various base materials made of these inorganic materials develop various effects due to the effect of the supported particle material (acting on the moisture in the air or in contact with the water or acting on the contact material ( Odor etc.).

In addition, when the composite inorganic material is powdered, it can be kneaded into a fiber or a resin, and can be easily attached or spread on the surface of the resin base material.
A composite inorganic material is one in which a particulate material is supported on a base material made of an inorganic material. Colloidal silica is interposed between the particulate material and the substrate. The colloidal silica interposed therebetween includes a case where part or all of the colloidal silica melts, and includes a case where the particles are partially bonded due to melting. The content of colloidal silica is not particularly limited, but is preferably about 20% to 50%, more preferably about 25% to 30%, based on the total mass. By adopting the lower limit of this range, the particle material and the base material can be joined, and by adopting the upper limit of this range, the amount of addition of the particulate material can be made sufficient.

The base material is formed from an inorganic material, and its shape is arbitrary. For example, it can be in powder form. When the substrate is powdered, it is desirable to set the size so that it bares on the surface when it is attached or spread on a resin substrate described later or dispersed inside ( For example, a size greater than the film thickness). When a composite inorganic material is adhered to the surface of a resin substrate with a resin material (corresponding to a vehicle in terms of paint), a substrate having a particle size larger than the assumed thickness of the resin material is adopted. It becomes easy for the composite inorganic material to be bare. Specifically, the preferred particle diameter is sufficient if the size of the powder is the same as or larger than that of the particulate material, preferably 10 μm or less, more preferably 5 μm or less. Moreover, it is preferable to set it as 0.1 micrometer or more, and it is more preferable to set it as 0.5 micrometer or more.

Even if it is powdery, it can be made porous. And as a shape of a base material, it can also be set as another shape. Examples thereof include a honeycomb shape, a ball shape, and a plate shape. By making a porous body having pores penetrating the inside as a base material, gas or liquid can pass through the inside.

The inorganic material forming the substrate is a carbide such as zirconium carbide, titanium carbide, tungsten carbide, silicon carbide, or boron carbide, or an oxide such as silica, alumina, or zirconium oxide. When a carbide such as zirconium carbide is employed, it is desirable that an absorption peak exists at a wavelength of about 0.5 μm to 10 μm.

The particle material is formed of one or more materials selected from the group consisting of platinum, gold, silver, and palladium, and may contain other elements. The volume average particle size of the particulate material is about 1 nm to 1000 nm, preferably about 10 nm to 300 nm. By making the lower limit of this range, the production is easy, and by making the upper limit, the effect can be surely exhibited. It is desirable that the particle size of the particulate material is as small as possible. In particular, it is desirable that 90% of the particles have a particle diameter of 10 nm to 300 nm on a mass basis. The content of the particulate material is not particularly limited, and an appropriate amount is mixed as necessary. Although the manufacturing method of a particulate material is not specifically limited, An example is combined and performed by description of a later manufacturing method.

The carbon particles are adhered to the surface of the substrate. Here, the particulate material and the carbon particles may be attached together on the same base material, or may be attached to different base materials. When the particle material and the carbon particle are attached to different substrates, the far-infrared action (presumed to be the action of the carbon particle) and the reduction action (presumed to be the action of the particle material) are sufficiently exhibited. desirable. The method for attaching the carbon particles is not particularly limited, but it is preferable to carry out the method through lanthanum boride. The carbon particles are preferably not small in particle size. For example, the particle size is preferably 3000 nm or less, more preferably 300 nm or less, and particularly preferably 200 nm or less.

The existence ratio of the base material to the carbon particles has an appropriate value depending on the particle size and specific surface area of the base material. That is, it is desirable to have carbon particles so that the surface of the substrate can be covered without any gaps. The base material is desirably larger than the particle size of the carbon particles.

The amount of lanthanum boride is not particularly limited, but a preferable amount depends on the specific surface area of the substrate, and is desirably an amount capable of sufficiently bonding the carbon particles to the surface of the substrate.
In addition, the composite inorganic material may contain catechin. For example, it can be attached to a portion of the surface of the base material where the particulate material is not attached, can be interposed between the particulate material and the base material, or can cover part or all of the surface of the particulate material. . The content of catechin is not particularly limited, but is preferably about 10% to 30%, more preferably about 15% to 20%, based on the total mass.

(Production method of composite inorganic material)
The composite inorganic material manufactured by this manufacturing method is the composite inorganic material described above. The manufacturing method of the composite inorganic material of this embodiment has the carbon particle adhesion process which is a process of attaching carbon particles to the surface of a base material, and also the particle material adhesion process of attaching particle material. Here, when attaching the particle material and the carbon particle to the same base material, both of these two steps are performed. However, the order of mixing the base material, the carbon particle, and the particle material, and the order of bonding are as follows. Not limited

-Carbon particle adhesion process This process has the process (heat-treatment process) of heat-processing a base material.
The heat treatment step is a step performed by heating the substrate in the presence of the carbon feed material and lanthanum boride. This step is performed in a non-oxidizing atmosphere. The non-oxidizing atmosphere is not particularly limited, and examples thereof include a rare gas such as argon, krypton, xenon, and helium, and the presence of a gas capable of realizing a non-oxidizing atmosphere such as nitrogen and hydrogen, or a vacuum state. In particular, it is desirable to be in the presence of an inert gas such as a rare gas. By selecting at least one gas or mixed gas selected from the group consisting of argon, krypton and xenon among the rare gases, the far infrared radiation ability of the manufactured product is improved.

This step is a step that is performed in a temperature range of 1000 ° C. or more and 1200 ° C. or less. By making it into this temperature range, the properties of the produced carbon particles and lanthanum boride are excellent. Specifically, the generated carbon particles and lanthanum boride have a form excellent in far-infrared radiation as described above. What was mentioned above is employable as a base material.

The carbon supply material is a material that is carbonized to generate carbon particles under heating conditions of 1000 ° C. or more and 1200 ° C. or less, and is in a gas or liquid state. In particular, it is desirable that the material be gasified under the above heating conditions. For example, hydrocarbon gases such as butane, propane, and methane, and alcohols such as methanol and ethanol can be used.

It is desirable that the generated carbon particles have a small particle size. For example, the particle size is preferably 3000 nm or less, more preferably 300 nm or less, and particularly preferably 200 nm or less. As a method for reducing the particle size, for example, a method of increasing the cooling rate from the maximum temperature to around 800 ° C. (50 to 100 ° C./min) can be mentioned.

・ Adhesion process (process to attach particulate material to the substrate)
In the attaching step, the base material is directly applied to the particle material colloid-containing dispersion (when the particulate material is attached to another base material different from the base material on which the carbon particles are attached. In this case, the base material on which the carbon particles are attached) After mixing, disperse it in the resin substrate described later), or the product obtained in the carbon particle adhesion step (carbon particle adhesion substrate: both particle material and carbon particles are adhered to the same substrate) Is a step of adhering the particulate material colloid to the surface of the substrate. The particulate material colloid is a dispersion having a particulate material, a colloid agent for colloiding the particulate material, and colloidal silica, and dispersed in some dispersion medium. Examples of the dispersion medium include water and alcohol (such as ethanol). Although it does not specifically limit as a colloid agent, So-called thickener, surfactant, and the carboxy group containing compound which contains a carboxy group in a chemical structure can be illustrated. Examples of colloidal agents include polyacrylic acid (including salts such as Na salt and K salt), polymethacrylic acid (including salts such as Na salt and K salt), polyacrylic acid ester, polymethacrylic acid ester, and polyvinylpyrrolidone. (Especially poly-1-vinyl-2-pyrrolidone), polyvinyl alcohol, aminopectin, pectin, methylcellulose, methylsulose, glutathione, cyclodextrin, polycyclodextrin, dodecanethiol, organic acids (hydroxycarboxylic acids such as citric acid) And glycerin fatty acid ester (polysorbate), cationic micelle-cetyltrimethylammonium bromide, surfactant (anionic, cationic, amphoteric, nonionic), alkali metal salt of alkyl sulfate, and mixtures thereof. When the colloidal agent is a carboxy group-containing compound, it is desirable that the colloidal agent is contained so that the number of moles of carboxy groups is about 80 to 180 moles based on the number of moles of platinum relative to the particulate material. The content of the colloidal silica is preferably 10% by mass or more and 50% by mass or less, more preferably 10% by mass or more and 30% by mass or less based on the whole solid content. Colloidal silica has a particle size of about 1 nm to 1 μm.

The particle material colloid-containing dispersion is prepared by precipitating the particle material by refluxing a solution prepared by dissolving a noble metal salt and a protective agent (for example, an organic acid) in a mixed solution of water and alcohol. it can. Thereafter, the dispersion medium can be replaced with alcohol (such as ethanol). Examples of the substitution method include a method of repeating the operation of adding a dispersion medium (such as alcohol) after substitution after evaporating a part of the dispersion medium before substitution.

After the particle material colloid-containing dispersion is brought into contact with the substrate, the particle material colloid is adhered to the surface of the substrate, and then the dispersion medium is removed by any method (for example, drying) to obtain the deposit. .

望ましい Adopting a spray drying process is a desirable method for making the form of the deposit into powder. The spray drying process is a method in which a powdery form is adopted as a base material, and spray drying is performed in a state where the base material is dispersed in a dispersion containing colloidal particle material. The conditions for performing spray drying are not particularly limited, but it is desirable to set the temperature so that the dispersion medium can be removed quickly. For example, when water is used as the dispersion medium, the dispersion medium can be quickly removed by evaporation when the temperature for spray drying is about 180 ° C. to 250 ° C.

When employing the spray drying process, catechin can be contained in the particle material colloid-containing dispersion. By adding catechin, the antioxidant ability can be improved. However, since the catechin is also removed when the above heating step is performed, the heating step is not performed when catechin is added, and only the powder is formed in the spray drying step. The content of catechin is not particularly limited, but can be about 10% to 20% based on the total mass. Moreover, you may carry | support catechin after the below-mentioned heating process.

Then, a heating process is performed on the deposit. The heating step is a step of oxidizing and removing the colloidal agent by heating in an oxidizing atmosphere. At this time, it is particularly desirable that the colloidal silica is melted or softened to bond between the particulate material and the base. The form of the deposit when performing the heating step is not particularly limited, and can be performed in a powder form or a lump form (for example, a plate form). The composite inorganic material can be formed in a required shape by performing this heating step after finally forming into the required shape. Moreover, it can also be made into powder by adding operations, such as grind | pulverizing the obtained composite inorganic material. The heating temperature is preferably about 800 ° C. to 1100 ° C., more preferably 900 ° C. to 1000 ° C. The heating time can be appropriately set according to the time required for removing the bound state and the colloidal agent by colloidal silica, and can be set to, for example, about 1 to 3 hours. Note that it is not always necessary to completely remove the colloidal agent.

-Resin base material It does not specifically limit except being comprised from a resin material as a resin base material. It does not specifically limit as a form of a resin base material, It shape | molds in the form to which the biological tension relaxation member of this embodiment is applied. Examples of the resin material include a polymer material. For example, polyurethane, rubber material, latex (foam), polyolefin resin such as polyethylene and polypropylene, polyester resin such as polyethylene terephthalate (PET) resin, polybutylene terephthalate (PBT) resin, polyamide such as nylon 6 and nylon 66 Resin, ABS resin, etc. can be employed.

(Manufacture of composite inorganic materials (ceramics carrying precious metals: powder))
・ Manufacture of carbon particle-attached base material While supplying butane gas as a carbon feed material, zirconium carbide as a base material (average particle size 1 μm: 100 parts by mass) and lanthanum boride (average particle size 1 μm: 15 parts by mass or less) And a mixture (previously mixed with a power mill (Dalton)) were thinly adhered onto the ceramic plate and heated.

The heating conditions were 1000 ° C. or higher and 1200 ° C. or lower. The mixture was heated in a hydrogen gas atmosphere, and after reaching the set temperature, butane gas was supplied and treated for 45 minutes.

The supply amount of butane gas was 2% by mass or more (preferably 3% by mass or more and 4% by mass or less) with respect to zirconium carbide. Actually, since the butane gas concentration differs depending on the space of the atmosphere furnace in which these are sintered, the gas corresponding to the replacement of the hydrogen gas staying in the furnace space with the butane gas was continued.

After the butane gas injection, the atmosphere furnace was quenched. When enough butane gas was sent, the inflow of air into the furnace caused an oxidation (ignition) phenomenon of unburned carbon, so the gas inflow was stopped immediately.

This is because if the cooling rate in the furnace is low, crystallization of carbon proceeds, so-called graphite particles called graphite are generated, and far infrared absorption characteristics are deteriorated.

Therefore, the cooling rate until the temperature reaches 400 ° C. or less, which is a safe temperature at which carbon does not reignite, was set to 50 ° C./min or more. For this forced cooling method, an air cooling method was adopted. The cooling method may be other than the air cooling method as long as it can be rapidly cooled to a safe temperature.

As the manufacturing method, the particle diameter of the carbon particles to be generated was changed by changing the conditions. The condition for reducing the particle size of the carbon particles is to increase the cooling rate of 1200 ° C. to 800 ° C. (for example, 50 to 100 ° C./min).

・ Support of particulate material on substrate (attachment to substrate different from substrate to which carbon particles are attached)
10 parts by mass of a colloidal silica dispersion containing 35.5% silica (SiO ₂ ) and 64.5% H ₂ O, and a platinum nanocolloid dispersion having a volume average particle diameter of about 5 nm (manufactured by APT) , Platinum content 20 μg / 0.1 g: volume average particle diameter of platinum fine particles 5 nm, colloidal agent: citric acid, corresponding to particle material) 12 parts by mass together with 100 parts by mass of pure water, silica particles ( 100 parts by mass of a volume average particle size of 10 μm) was mixed to obtain a deposit (dispersion) in which platinum nanocolloid fine particles adhered to the surface of the substrate (attachment step).

The spray drying process was performed on the deposit using a spray dryer. The spray drying was performed by spraying the deposits in a tank having a temperature of about 180 ° C. to 250 ° C. The obtained powder was recovered, then placed in a ceramic container (sheath) and heated in an electric furnace at about 900 to 1000 ° C. for 1 hour (heating step). As a result of the heating process, citric acid as a colloid agent is oxidized and volatilized, and platinum nanoparticles having a volume average particle diameter of about 5 nm are fixed on a silica surface of about 10 μm, and a fine powdery composite with water resistance. An inorganic material (Test Sample 1) was obtained.

-Manufacture of mattress cover Test sample 1 was kneaded into PET fibers (Example 1) and nylon fibers (Example 2) to prepare fibers of the examples. The PET fiber was 150d. In kneading, fibers that were not different from those not kneaded were obtained. The content of the test sample was 7.5 parts by mass with respect to 100 parts by mass of the fiber. Platinum as a noble metal will contain 22.6 micrograms per 1g of mass of the obtained fiber.

A mattress cover was manufactured by weaving this fiber into a cloth. As a comparative example, a mattress cover of the same shape was manufactured from PET fiber and nylon fiber not containing a test sample.

・ Test 1 (Measurement of antioxidant capacity)
A part (200 mg) of the mattress covers of the examples and comparative examples was cut out and immersed in 12 mL of pure water. Thereafter, 4 mL of an ethanol solution of 0.125 mmol / L DPPH (1,1-diphenyl-2-picrylhydrazyl: manufactured by Wako Pure Chemical Industries, Ltd.) was added and stirred, and left in the dark for 1 hour.

The main peak (515 nm) of DPPH was measured. The antioxidant ability of the mattress covers of Examples and Comparative Examples can be measured from the change in the peak size derived from DPPH. If there is an antioxidant ability, the concentration of DPPH (size of peak at 515 nm) becomes small. It shows a value converted into the amount of ascorbic acid from a calibration curve in which the magnitude of the decrease in DPPH peak was measured and calculated in advance.

As a result, the mattress cover of the comparative example (PET fiber) was 0.288 ppm, and when this value was 100, the mattress cover of Example 1 (PET fiber) was 1.578 ppm and 548. And the mattress cover of the comparative example (nylon fiber) was 641 at 1.845 ppm, and the mattress cover of Example 2 (nylon fiber) was 1427 at 4.106 ppm.

From the above results, it was found that the mattress cover of the example containing Pt can exhibit the antioxidant ability.

-Effect of mattress with test sample 2 on living body (human body) An ink was produced by dispersing test sample 2 in water as a solvent at a concentration of 10% by mass. An aqueous binder (Murakami screen) was allowed to act as a dispersant. Using this ink, test sample 2 was attached to the surface of a soft urethane foam as a soft foam. As a result, a mattress in which the test sample 2 was spread on the surface was obtained (Example). The amount of test sample 2 attached was 80 g / m ² in a wet state. The mattress before attachment was used as it was for a comparative example (comparative example). Infrared emissivity was measured for the mattresses of Examples and Comparative Examples (based on JIS R 1801). Specifically, the black body and the sample were set to the same temperature (140 ° C.), and each infrared ray (average value of wavelengths 4 to 8 μm) emitted therefrom was measured by FT-IR. (An ideal black body is an ideal radiator that emits 100% of all wavelengths. Since it does not actually exist, the one close to the ideal black body was used.) The amount of far-infrared emitted from the sample with respect to the amount of far-infrared was calculated and used as the far-infrared emissivity. The Far-Infrared Association has established a standard for far-infrared processing that there is a far-infrared emissivity difference of 5% or more in the entire wavelength range and 10% or more in the specific wavelength range compared to the unprocessed product. As a result, it was 94% for the mattress of the example and 62% for the mattress of the comparative example. That is, it was found that the mattress of this example can exhibit the antioxidant ability and emit infrared rays.

Crossover test (different date, same time) for 14 subjects (9 males, 5 females: all in their 20s) against the mattresses of the examples and comparative examples (covered with a commercial cloth mattress cover) The test using the mattresses of the example and the comparative example was performed on the belt. Specifically, sufficient sleep was taken the night before the experiment, and meals other than water intake were restricted from 3 hours before the experiment. Smoking and intense exercise were also restricted.

In the experiment, a simple calculation task was performed for a total of 20 minutes, and then rested on the mattress in a resting position for 15 minutes. During the break, a task of pressing a button for about 5 minutes was imposed twice so as to remain awake. The button press response task required that the left button of the mouse be clicked as fast as possible only when a high sound was presented among two randomly presented sounds (1000 Hz or 2000 Hz single sound). The reaction task was performed with the eyes closed and the rest was rested with the eyes open.

Measured before and after the calculation task and before and after the break. The measurement was performed by measuring the amount of chromogranin A (CgA) in saliva and subjective emotion evaluation (POMS: mood profile test, VAS: visual analog scale). POMS measures mood by six factors: tension, depression, anger, vitality, fatigue, and confusion, and can also evaluate total mood disorders (TMD). VAS is a visual analog scale of stress that is evaluated by quantifying the position of the line by attaching a line to the position corresponding to the current state on the 10 cm line segment from “I don't feel at all” to “I feel very much”. How to do it.

The statistical analysis confirms that there is no difference between the conditions before and after the calculation task, and then sets the baseline after the calculation task, and shows the difference in changes after rest compared to the baseline for each evaluation index. Non-parametric methods were used between mattresses.

VAS change: The results of statistical analysis are shown in FIG. In FIG. 1, the result of the mattress of the example is described as platinum (or platinum), and the result of the mattress of the comparative example is described as normal (or normal) (the same applies to FIGS. 2 and 3 below). . There was no statistically significant difference between each mattress. However, it is assumed that the overall impression from the average value may affect the mood improvement direction of the mattress of the embodiment.

POMS change: The results of statistical analysis are shown in FIG. Regarding the POMS score, a tendency to suppress an increase in the fatigue score was observed when taking a break with the mattress of the example. The increase in the fatigue level of the mattress of the comparative example is considered to be fatigue due to the button press reaction task, and it is considered that the mattress of the example can reduce this fatigue.

CgA: The rate of change of CgA concentration in saliva is shown in FIG. From FIG. 3, the rate of change of the mattress of the example was significantly lower than that of the mattress of the comparative example. That is, the person who took a break with the mattress of the example had the effect of lowering the degree of stress compared with the mattress of the comparative example.

Based on the above results, the breaks in the mattresses of the examples tend to suppress fatigue due to the execution of mental loads such as calculation tasks and button press tasks compared to the breaks in the mattresses of the comparative examples, and biochemical stress markers It was confirmed that the increase in chromogranin A, which is the above, was suppressed, and it was suggested that there was a stress reduction effect.

Although details are not individually described, this effect is manifested according to the amount of test sample 2 attached to the mattress. Moreover, the result of the same tendency is obtained even when the test sample 1 is attached.

Claims

A particle material made of platinum, gold, silver, or palladium having a volume average particle diameter of 1 to 300 nm, and silica, alumina, carbonized, which carry the particle material and carbon particles on the same particle surface and / or different particle surfaces, respectively. A base material made of an inorganic material which is zirconium, zirconium oxide, titanium carbide, tungsten carbide, silicon carbide, and / or boron carbide, and an adhesive layer made of colloidal silica interposed between the particle material and the base material; A composite inorganic material having
A resin base material containing the composite inorganic material and / or adhering to the surface and composed of a resin;
Have
Used in contact with or close to a living body,
Biological strain relief member.
The ecological tension alleviation according to claim 1, wherein the carbon particles have an average particle diameter of 100 nm or more and 3000 nm or less, are amorphous and amorphous, and are fixed to the surface of the base material by lanthanum boride. Element.
The inorganic material is zirconium carbide, the surface of the carbon particles is coated, and the average particle size is larger than the carbon particles,
The ecological tension alleviating member according to claim 2, comprising lanthanum boride in the vicinity of a portion where the carbon particles and the substrate are in contact with each other.
4. The biostatic member according to any one of claims 1 to 3, wherein the base material is a particle having a volume average particle diameter of 2 μm or more.
The resin base material is in the form of a foam that holds the composite inorganic material on the surface and / or is dispersed inside,
The living body tension alleviating member according to any one of claims 1 to 4, wherein the living body tension reducing member is a soft foam.
The resin base material is in the form of a fiber that holds the composite inorganic material on the surface and / or is dispersed inside,
The biological strain alleviating member according to any one of claims 1 to 4, which constitutes a cloth.