JP2020125560A - Iodine-carrying material - Google Patents

Abstract

To provide an iodine-carrying material which carries iodine on a material such as fiber and sterilizes microorganisms over a long period of time, in a non-invasive manner to a living body.SOLUTION: A method for producing an iodine-carrying material by impregnating an adsorptive material with iodine includes: adjusting iodine to a neutral or acidic state so that an iodine ion or an iodate ion is not formed at the time when iodine is impregnated; and then impregnating the material with the iodine in a state of elemental iodine so that the iodine is not released into the air or eluted into water and can adsorb to the material so as to inactivate microorganisms by the iodine.SELECTED DRAWING: Figure 1

Description

The present invention relates to an iodine-supporting material in which a material such as fiber is supported with iodine to have antibacterial/antiviral properties.

Iodine (I ₂ ) is one of the halogen elements and has a strong bactericidal power. Iodine is a disinfectant that is relatively soluble in alcohol and has a strong bactericidal effect on iodine tincture dissolved in ethanol. However, since tincture of iodine is strongly irritating to the living body, povidone iodine in which polyvinylpyrrolidone and iodine are mixed to weaken the influence on the living body is used as a mouthwash.

When iodine is dissolved in an aqueous solution of potassium iodide (KI) or sodium iodide (NaI), it becomes a state of triiodide ion (I ₃ ⁻ ), etc. Therefore, by impregnating it with activated carbon, It can be supported on the pores. As described in Patent Documents 1 and 2, an application of an iodine activated carbon for sterilizing microorganisms other than spore bacterium adsorbed in the pores of activated carbon in a non-invasive manner to living organisms is applied.

Iodine-based disinfectants are medium-level disinfectants that have the same efficacy as chlorine-based disinfectants, and have a disinfecting effect against viruses, fungi, and bacteria (hereinafter referred to as microorganisms) excluding some spore-forming bacteria. is there. However, the iodine-based disinfectant may damage the living body when sterilizing microorganisms. Therefore, when an iodine-based disinfectant is used, it is desired that it be non-invasive to the living body.

For example, slaked lime (calcium hydroxide) is used for disinfecting livestock infectious diseases such as avian influenza virus. Slaked lime is sprinkled on the playground and in the fields, but there is a risk of blindness if it comes into sight. When slaked lime reacts with carbon dioxide to form calcium carbonate, the alkali content is neutralized and the disinfecting effect is lost, so that the effect cannot be maintained for a long time in the environment.

Japanese Patent Application No. 2017-102762 Japanese Patent Application No. 2018-032302

The inventions described in Patent Documents 1 and 2 are non-invasive to the living body and can maintain the effect for a long period of time, but when activated carbon is granular or powdery, it easily scatters, so that the human body such as clothes and masks It is difficult to use when touching directly.

Therefore, an object of the present invention is to provide an iodine-supporting material that supports iodine on a material such as a fiber and sterilizes microorganisms over a long period of time without invading a living body.

In order to solve the above-mentioned problems, the present invention is a method for producing an iodine-supporting material by impregnating iodine with an adsorptive material, in which iodine ion or iodate ion is not generated when the iodine is impregnated. So that the iodine is not released into the air or eluted in water, and can be adsorbed to the material to inactivate microorganisms with the iodine, in the state of elemental iodine. It is characterized in that it is attached to the material.

In addition, the method for producing the iodine-supporting material is such that the iodine is sublimated and adsorbed on the material so as not to be in the state of iodine ions or iodate ions, so that the material is in a gaseous phase in the state of elemental iodine. It is characterized by being attached.

Further, in the method for producing an iodine-supporting material, the material is a polyamide having a nitrogen atom in a main chain of a polymer structure, a material having a urethane bond, or wool.

Further, in the method for producing the iodine-carrying material, the material is vinylon or polypropylene.

Further, in the method for producing an iodine-carrying material, the material is a material in which fibers are mixed-spun or electrostatically flocked.

Further, the iodine-supporting material of the present invention is characterized by being manufactured by the above method.

According to the present invention, iodine is strongly retained in a material such as a fiber and adsorbs surrounding microorganisms without being released into the air or eluted in water, and thus long-term non-invasive to a living body. Microbes can be sterilized and inactivated over a period of time.

It is a figure which shows the structure of the iodine carrying material which is this invention. It is a figure which shows the result of the antibacterial test of the iodine carrying material which is this invention. It is a figure which shows the result of the antibacterial activity retention test of the iodine carrying material which is this invention. It is a figure which shows the result of the retention test by the processing time of the iodine carrying material which is this invention. It is a figure which shows the conditions of the antiviral test of the iodine carrying material which is this invention. It is a figure which shows the result of the antiviral test of the iodine carrying|support material which is this invention. It is a figure which shows the result of an antibacterial test when the iodine carrying material which is this invention is electrostatically flocked. It is a figure which shows the antibacterial activity value of the iodine carrying material which is this invention. It is a figure which shows the degree of processing of the iodine carrying material which is this invention, and its effect. It is a figure which shows the rubber glove which carried out the antibacterial treatment of the iodine carrying material which is this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that components having the same function are denoted by the same reference numeral, and repeated description thereof may be omitted.

First, the iodine-supporting material of the present invention will be described. FIG. 1 is a diagram showing the structure of the iodine-carrying material. As the iodine-supporting material, a material having adsorptivity such as fiber or activated carbon is used as a carrier, and iodine (I ₂ ) is impregnated in the carrier in a water phase (liquid phase) or a gas phase to support (elemental) iodine. It is an antibacterial/antiviral material.

Fibers (cloths, clothing in general) include synthetic fibers (nylon, polyurethane, etc.), natural fibers (wool, silk, cotton, hemp, cellulose, etc.), synthetic resins (vinylon, polypropylene, polyurethane, polyester, acrylic, nylon). Etc.), natural resin, synthetic rubber (nitrile etc.), or natural rubber. Further, the adsorption includes physical adsorption by Van der Waals force acting between atoms, ions or molecules and chemical adsorption by covalent bond (chemical bond).

For example, as shown in FIG. 1A, polyvinyl alcohol (PVA) is used as the material 100, and it is immersed in an aqueous solution of iodide salt (potassium iodide, sodium iodide, etc.), treated with boric acid 300, and then rolled. When dried, iodine 200 is sandwiched in the state of polyiodide ion (I ₃ ⁻ or I ₅ ⁻ ) between the surface of the crystal part of PVA and the molecular chain 110 of the amorphous part, and boric acid 300 is formed at both ends. It is closed and fixed with the tetramer (4 molecule polymer). Iodine 200 adsorbed between PVA molecular chains arranged in the stretching direction forms a complex, and polyiodine is supported in a lined state.

Further, as shown in FIG. 1B, when nylon 6 is used as the material 100a and is immersed in an aqueous solution of iodide salt (water phase treatment) or exposed to iodine gas (gas phase treatment), a molecular chain 110 of nylon 6 is formed. Iodine 200 is adsorbed during this period and polyiodine is carried in an oriented state. Nylon is a polyamide synthetic resin (fiber) containing a nitrogen atom in the main chain of its polymer structure, and includes nylon 6 and nylon 6,6. Nylon has an amide bond (bond between carbonyl group and nitrogen), and polyiodine is electrophilically ionically bonded to the unshared electron pair of the nitrogen atom to form a linear polyiodine complex. ..

When iodine is supported, the material fiber or the like is dyed. Since the polyiodide ion has a negative charge, if the material has a positive charge such as nylon, iodine will not elute even if the material carrying iodine is washed with water. That is, if the stain remains, the iodine remains, and the antibacterial/antiviral effect also remains.

Polyurethane is a polymer having a urethane bond (covalent bond between nitrogen of amine and carbon of carbonyl group). Like nylon, polyiodine is linearly sandwiched near the nitrogen element to support iodine. Wool (wool) also contains a large amount of nitrogen in the fiber and can carry iodine. It should be noted that these fibers may be a mixture of a plurality of fibers, or may be a material obtained by electrostatically implanting other materials.

It should be noted that cotton, silk, acrylic, polyester (polyethylene terephthalate, etc.), rayon, etc. that have a large amount of oxygen and hydroxyl groups in the main chain or side chain of the polymer structure do not readily carry iodine, and thus do not have water, etc. It is not easily retained because it easily elutes.

Polypropylene, which is a crystalline plastic, has a degree of crystallinity of 40 to 70%, and if the degree of crystallinity is low, it is the same as that of polyvinyl alcohol (a raw material for vinylon) between the molecular chains of the crystalline part and the amorphous part. It is possible to sandwich and support polyiodide ions.

As a method of supporting iodine on the material, there are an aqueous phase treatment and a vapor phase treatment. In the aqueous phase treatment, first, iodine alone (I ₂ ) is dissolved in a potassium iodide (KI) aqueous solution or a sodium iodide (NaI) aqueous solution to form a triiodide ion (I ₃ ⁻ ). By immersing the material in it, iodine is adsorbed to the material and held stably. The triiodide ion is polyiodide produced by iodine alone and iodide ion (I ⁻ ).

Further, in the gas phase treatment, since iodine has sublimability, iodine gas in which iodine is vaporized is adsorbed and stored in the material. Since iodine gas has a relatively weak bond between atoms, it may be dissociated at a high temperature into a monoatomic molecule, and is supported by the material in the state of elemental iodine (I). Elemental iodine is in a state of having a high chemical activity, like the radical ( ^* I) generated by irradiating iodine alone with ultraviolet rays. Elemental iodine includes not only a monoatomic molecule of iodine but also simple substance of iodine.

Polyiodine is molecule-adsorbed (covalent bond) by Van der Waals force (intermolecular force bond). Furthermore, in the case of elemental iodine, a plurality of monatomic molecules are physically and chemically strongly bonded by forming a multi-bond (multi-bond) in a network form. Therefore, elemental iodine is stably supported on the material for a long time in a state where it is not released into the air and is not eluted into water while maintaining its chemical activity.

Iodine has considerably strong bactericidal activity in the state of iodine alone or elemental iodine ( ^* I), but loses bactericidal activity in the state of iodine ion (I ⁻ ). In addition, when it is in a state of triiodide ion (I ₃ ⁻ ), iodate ion (IO ₃ ⁻ ), periodate ion (IO ₄ ⁻ ), or the like, the bactericidal activity is maintained, but it is water-soluble and therefore water-soluble. If dissolved and diffused in, the sterilizing power will be impaired. Therefore, iodine does not include states of iodine ion (iodide ion), triiodide ion, and (per)iodate ion.

Iodine has no antibacterial/antiviral effect when it is in a reducing state because it becomes an iodine ion state. Further, when the potential is in an extremely oxidized state, it becomes a state such as iodate ion and thus has a strong oxidizing power (antibacterial/antiviral effect), but since it is water-soluble, the effect does not last long. If the pH (hydrogen ion concentration) is neutral to acidic, the state of elemental iodine is maintained, it also has oxidizing power (effect of antibacterial and antiviral), and it is difficult to dissolve in water, so the effect lasts for a long time. When the pH becomes alkaline, the state of iodate ion or iodide ion occurs, so that the sustainability of the effect cannot be expected.

Antibacterial/antiviral materials inactivate microorganisms. Inactivation is the killing of microorganisms and the loss of infectivity. Specifically, iodine cation oxidizes cysteine, which is an amino acid residue of proteins in vivo, and iodines tyrosine and histidine. To alter the protein. Note that inactivation includes sterilization (virus), sterilization (virus), disinfection, sterilization (virus) or antibacterial (virus).

Microorganisms include viruses, fungi (molds) and bacteria. The virus includes (bird) influenza virus, norovirus, Ebola virus, foot-and-mouth disease virus, human immunodeficiency virus (HIV) and the like. Although viruses are not defined as organisms by definition, they are included in microorganisms. Fungi are fungi such as Trichophyton. Bacteria are highly durable spore bacteria such as Bacillus subtilis and Bacillus natto, and general bacteria such as Mycobacterium tuberculosis, Escherichia coli, Cholera and Salmonella.

For example, disinfectants include high level disinfectants that are effective against most spores, medium level disinfectants that are effective against Mycobacterium tuberculosis and most fungi and viruses, and most common bacteria and some fungi and viruses. There are low level disinfectants that are effective against. Resistance to antiseptics is in the order of spore bacterium, virus, tubercle bacillus, and general bacteria. Iodine is a medium-level disinfectant and is effective against microorganisms except for some spore-forming bacteria that are resistant to iodine.

Since iodine is stably retained in the iodine-supporting material, and iodine is not released or eluted from the iodine-supporting material, only the microorganisms adsorbed by the iodine-supporting material are affected without affecting the surrounding materials. Inactivate with iodine. That is, it is non-invasive to living bodies such as humans and animals, and passively inactivates microorganisms.

Next, the antibacterial property of the iodine-supporting material will be described. FIG. 2 is a diagram showing the results of antibacterial tests of iodine-supporting materials. FIG. 3 is a diagram showing the results of the antibacterial activity retention test of the iodine-carrying material. FIG. 4 is a diagram showing the results of a retention test according to the processing time of the iodine supporting material.

As shown in FIG. 2(a), as samples, nylon, wool (natural fiber containing keratin as a main component), polypropylene (lightweight synthetic fiber having high strength and no hygroscopicity), polyester (synthetic fiber such as PET) And five kinds of fibers of silk (natural fiber containing fibroin as a main component) were used to carry iodine in a dry manner (gas phase) (supporting I ₂ ), and iodine was carried in a dry manner and then continued overnight. The antibacterial property was tested for the product washed with water (washed with water after carrying I ₂ ).

As shown in FIG. 2( b ), a standard agar medium was coated with coliforms, a sample was placed on the surface, and the growth state of Escherichia coli (size of inhibition circle) was observed after culturing at 36° C. for 18 hours. ..

With respect to nylon, wool and polypropylene, the inhibition circles are prominent in both (I ₂ supported) and (I ₂ supported and washed with water), and it is understood that the antibacterial properties are large. Further, regarding the polyester and silk, no inhibition circle was observed in both (I ₂ supported) and (I ₂ supported and washed with water), which shows that there is no antibacterial property.

As shown in FIG. 3( a ), as a sample, a nylon non-woven fabric supporting 30 g of iodine per square meter (30 g/m ² ) and a non-woven nylon fabric supporting 70 g of iodine per square meter (70 g/m ² ). m ² ) was used to support iodine in the gas phase and then washed with water.

By supporting iodine, the nylon nonwoven fabric is colored, and (70 g/m ² ) in which a large amount of iodine is supported becomes darker than (30 g/m ² ). It can be seen that in both (30 g/m ² ) and (70 g/m ² ), although the coloring is lightened by washing with water, iodine remains in the fiber and the antibacterial activity is retained.

As shown in FIG. 3( b ), as a sample, a nylon cloth (nylon) supporting iodine and a wool cloth (wool) supporting iodine were used, and iodine was carried in the gas phase and then washed with water. did.

It can be seen that although the color of (wool) is lightened by washing with water, iodine remains in the fibers and the antibacterial activity is retained in both (nylon) and (wool).

As shown in FIG. 3(c), as a sample, a polypropylene non-woven fabric having a breathable film in the middle to have a three-layer structure was used, and iodine was carried by a gas phase treatment for 16 hours and left in the air. (Leaving in gas phase), What was washed with water by supporting iodine in the gas phase treatment (Washing in vapor phase), What was left in the air by supporting iodine in 48 hours of water phase treatment (Leaving in water phase), and Water What was washed with water by supporting iodine in the phase treatment (water phase water washing) was compared.

It can be seen that the iodine remains in the fiber and the antibacterial activity is maintained in any of (gas phase standing), (gas phase washing), (water phase standing) and (water phase washing).

As shown in FIG. 4(a), as samples, nylon, a mixture of nylon and polyurethane (a synthetic fiber having a urethane bond) (nylon+polyurethane), and wool were used for a gas phase treatment of 6 hours each. It was made to carry iodine, washed with running water, and left in water for 44 hours.

It can be seen that although the coloring becomes lighter with (wool), iodine remains in the fiber and antibacterial activity is retained in all of (nylon), (nylon+polyurethane) and (wool).

As shown in FIG. 4(b), a mixture of nylon and polyurethane (nylon+polyurethane) and wool were used to carry iodine for 72 hours in a vapor phase treatment and washed with running water for 1 hour.

The longer the time of impregnating iodine, the more intense the coloring of the fiber by iodine. It can be seen that in both (nylon+polyurethane) and (wool), iodine remains in the fiber and the antibacterial activity is retained.

Regarding iodine-impregnated nylon and (nylon+polyurethane) blends, the impregnated iodine is retained even if exposed to running water for a long time or strongly treated by an autoclave (pressurized steam atmosphere, 121°C, 30 minutes). , Their antibacterial properties are not lost.

Next, the antiviral property of the iodine-carrying material will be described. FIG. 5: is a figure which shows the conditions of the antiviral test of an iodine carrying|support material. FIG. 6 is a diagram showing the results of an antiviral test of iodine-supporting materials.

As shown in FIG. 5, as a sample, (A) a fabric on which nylon was loaded with iodine by vapor phase treatment for 18 hours, and (B) nylon was loaded with iodine on vapor phase treatment for 18 hours and washed with running water for 1 hour. The blended fabric, (C) nylon (83%) and polyurethane (17%) were mixed-spun, and the iodine-supported fabric was subjected to gas phase treatment, (D) nylon (83%) and polyurethane (17%) were mixed-spun. Cloth that was supported by iodine in the vapor phase and washed with running water for 1 hour, (E) Wool for 18 hours in the vapor phase treatment, and (F) Wool was treated for 18 hours in the vapor phase for iodine. Each of the cloths supported and washed with running water for 1 hour was cut into 1.5 cm square pieces.

As the virus used, avian influenza virus A/swan/Shimane/499/83 (H5N3) strain was used. This virus was inoculated into the allantoic cavity of 10-day-old embryonated chicken eggs and incubated at 35° C. for 2 days, and then allantoic fluid was collected and used as a virus solution, and the infectious titer of 50% embryonated egg (EID ₅₀ ) was calculated. It was calculated and adjusted to about 10 ^7.5 EID ₅₀ /0.2 mL with PBS (phosphate buffered saline).

For each of the samples (A) to (F), 0.4 g of the cloth cut into 1.5 cm was placed in a polyethylene bag, 200 μL of the virus solution was inoculated on the cloth, thoroughly kneaded and allowed to soak, and reacted at room temperature for 10 minutes. It was After the reaction, SCDLP medium was added and diluted 10 times. The cells were serially diluted 10-fold with PBS, 0.2 mL each was inoculated into three 10-day-old embryonated allantoic cavities of each dilution step, and the cells were cultured at 35°C for 2 days. After culturing, the allantoic fluid was collected overnight in a cool dark room, reacted with 0.5% chicken red blood cell suspension, and the presence or absence of virus growth was determined by agglutination of red blood cells. The residual virus titer was calculated as EID ₅₀ by the method of Reed and Muench.

As shown in FIG. 6( a ), the inactivating effect on the avian influenza virus was examined for each fabric supporting iodine. Both (A), (C) and (E) that had been subjected to the gas phase treatment and (B), (D) and (F) that had been washed with running water after the gas phase treatment had a residual virus titer of 1/500,000 in 10 minutes of reaction. It was confirmed that the amount was decreased below, and that a very high inactivating effect was exhibited.

Next, as shown in FIG. 6B, the inactivating effect on the avian influenza virus was examined for the samples (B), (D) and (F) by doubling the amount of the virus liquid. As a result, in (B), (D), and (F) that were washed with water after the gas phase treatment, the residual titer of avian influenza virus was reduced to less than 1 part per million by a reaction for 10 minutes even with an equal amount of virus solution. Reduced.

FIG. 7: is a figure which shows the result of an antibacterial test at the time of electrostatically flocking an iodine carrying material. As samples, paper with nylon electrostatically flocked (paper flocking), spunbond nonwoven with nylon 0.8 mm in length electrostatically flocked (spunbond flocking), and 0.2 mm PVC (polychlorinated) A vinyl synthetic resin) on which rayon (regenerated fiber) was electrostatically flocked (vinyl chloride flocking) was used.

Escherichia coli solution was applied to the surface of the standard agar medium after solidification, and iodine was carried by gas phase treatment for 24 hours (upper right of petri dish) (gas phase treatment), and iodine was carried by gas phase treatment (lower left of petri dish) Antibacterial properties were confirmed by a halo (inhibition circle) test for each of the samples that had been washed with water (vapor phase treatment and washed with water) and then incubated at 37° C. for 19 hours.

As shown in FIG. 7, in (paper flocking) and (spunbond flocking), an inhibition circle is observed in both (vapor treatment) and (water washing after vapor treatment). Electrostatic flocked ones have a strong antibacterial effect because the ultrafine fibers are raised and have a large surface area. Also, in (PVC flocking), a small inhibition circle was observed in (vapor phase treatment), but no inhibition circle was observed in (water washing after vapor phase treatment).

Next, the antibacterial property of the resin supporting iodine will be described. FIG. 8 is a diagram showing the antibacterial activity value of the iodine-carrying material. FIG. 9 is a diagram showing the degree of treatment of the iodine supporting material and its effect. FIG. 10: is a figure which shows the rubber glove which carried out the antibacterial treatment of the iodine carrying material.

As shown in FIG. 8(a), as samples, (1) 1 mm thick polypropylene with 0.2 mm thick nylon cloth (nylon/PP), (2) 0.4 mm thick polystyrene (PS) , (3) 0.3 mm thick (1.0 mm thick edge) silicon synthetic resin (silicone), (4) 0.3 mm thick rigid polyvinyl chloride (rigid PVC), and (4) 0.2 mm thick Soft polyvinyl chloride (soft PVC) was used.

A suspension of Escherichia coli (10 ⁵ to 10 ⁶ CFU/mL) in BGLB medium (brilliant green lactose broth medium) is used as a bacterial solution. 0.4 mL of bacterial solution was inoculated on the surface of antibacterial processing (supporting iodine by gas phase treatment for 24 hours) and unprocessed sample (5 cm × 5 cm), and then covered with polyethylene film (4 cm × 4 cm) for close contact, It was put in a petri dish and cultured at 35° C. for 22 hours. After culturing, the cells were washed out with 10 mL of sterilized physiological saline, collected, and cultured in an agar medium at 35° C. for 18 hours, and then the number of bacteria was measured.

The antibacterial activity value (R) is R=U-, where U is the log of the viable cell count of the unprocessed sample after 24 hours, and A is the log of the viable cell count of the antibacterial processed sample after 24 hours. It is calculated by the formula of A≧2.0.

As shown in FIG. 8( b ), the antibacterial activity value of (hard PVC) was 2 or less even after antibacterial processing, and the antibacterial property was low, but antibacterial processed (PS), (silicone) and (soft PVC) ), the antibacterial activity value was 2 or more, indicating that the antibacterial activity is high.

As shown in FIG. 9, a sample product in which the concentration of iodine impregnated was gradually changed (0 to 5% by weight) with respect to nylon + 17% polyurethane (blend product) fabric, and was brown depending on the impregnation rate of iodine. You can see the difference in the intensity of. As a result of the antibacterial test, the iodine impregnation rate showing the Escherichia coli growth inhibition circle was 1.0% by weight or more, and the growth inhibition circle tended to increase as the impregnation rate increased.

As shown in FIG. 10, medical gloves (natural rubber) may be loaded with iodine to impart an antibacterial/antiviral function. As the rubber gloves, natural rubber latex, synthetic rubber latex (nitrile synthetic rubber or the like), polyvinyl chloride or the like is used. The latex is an emulsion (emulsion) containing resin, natural rubber and the like.

With conventional rubber gloves, some of them are soaked in the solution of antibacterial agents such as titanium dioxide (photocatalyst), triclosan, benzalkonium chloride, silver salt, etc. However, the antibacterial and antiviral effects are low.

A strong antibacterial/antiviral effect is exhibited by immersing the part of the rubber glove to which the antibacterial/antiviral function is given in an iodine solution such as sodium triiodide (NaI ₃ ) or by exposing it to iodine gas. ..

According to the present invention, iodine is strongly retained in a material such as a fiber and adsorbs surrounding microorganisms without being released into the air or eluted in water, and thus long-term non-invasive to a living body. Microbes can be sterilized and inactivated over a period of time.

The embodiments of the present invention have been described above, but the present invention is not limited to these. INDUSTRIAL APPLICABILITY The iodine-carrying material of the present invention is used for protective clothing for infectious diseases, sportswear, general clothing/clothes, socks, escalator handrails, handrails, train suspension leather, seats, airplane floors, daily necessities/public goods (slippers). It can be used for toilet seat covers, touch panels for game consoles and ATMs, computer keyboards, medical/nursing items (surgical clothes, surgical tools, bed sheets to prevent floor rubs), agricultural sheets, etc. ..

100: Material 110: Molecular chain 200: Iodine 300: Boric acid

Claims (6)

A method for producing an iodine-supporting material by impregnating iodine into an adsorptive material,
After adjusting to neutral or acidic so that iodine ions or iodate ions are not generated during the impregnation of iodine, the iodine is not released into the air or eluted in water, and the microorganisms are inactivated by the iodine. In order to be adsorbed to the material, it is attached to the material in the form of elemental iodine.
A method for producing an iodine-carrying material, comprising: So as not to be in the state of iodine ions or iodate ions, by sublimating the iodine and adsorbing it to the material, it is attached to the material in the gaseous state in the state of elemental iodine,
The method for producing an iodine-carrying material according to claim 1, wherein The material is a polyamide containing a nitrogen atom in the main chain of the polymer structure, one having a urethane bond, or wool.
The method for producing an iodine-carrying material according to claim 1 or 2, characterized in that. The material is vinylon or polypropylene,
The method for producing an iodine-carrying material according to claim 1 or 2, characterized in that. The material is a fiber blended or electrostatically flocked,
The method for producing an iodine-supporting material according to any one of claims 1 to 4, characterized in that. Manufactured by the method according to any one of claims 1 to 5,
An iodine-supporting material characterized in that

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