JPH02213351A - Antibacterial magnet and production thereof - Google Patents

Abstract

PURPOSE:To effectively develop not only magnetic action but also antibacterial action over a long period of time by constituting an antibacterial magnet by bonding a fine granular magnet and fine granular antibacterial ceramics by a binder. CONSTITUTION:An antibacterial magnet is produced using a magnet bringing about magnetic action, antibacterial ceramics bringing about antibacterial action and a binder bonding both as main constitutional elements. Antibacterial ceramics are prepared by incorporating an Ag-ion, a Cu-ion and a Zn-ion in ceramics selected from aluminosilicate of alkali or alkaline earth metal, SiO2, ZrO2, Al2O3, MgO and TiO2 and one developing antibacterial properties by the action of a very small amount of metal ions can be used. This antibacterial magnet is obtained by mixing a magnet powder, an antibacterial ceramics powder and the binder and molding the resulting mixture at room temp. or under heating to bond the magnet powder and the ceramics powder by the binder.

Description

[Detailed description of the invention] [Purpose of the invention]

(Industrial Application Field) The present invention has both a magnetic effect and an antibacterial effect (including a sterilizing effect), and is suitable for applications where it is desired to utilize both the magnetic effect and the antibacterial effect, such as water purifiers, The present invention relates to an antibacterial magnet used in water tanks, baths, etc., and a method for manufacturing the same. (Conventional technology and its problems) Conventionally, antibacterial agents (including bactericides) have been organic-based such as benzimidazole-based, triazole-based, dithiocarbamate-based, and imide-based. is organic, so even if you try to incorporate antibacterial ingredients into the magnet by mixing it with magnet powder and solidifying it, the antibacterial ingredients may change in quality during molding, or even if the molding is not successful. Even if the antibacterial effect is short-lived, antibacterial magnets may be made by injection molding, extrusion molding,
200 to 350 when forming by roll forming etc.
As the temperature rises to about 0.3°C, the antibacterial agent decomposes and evaporates, leaving no residue inside the magnet, resulting in a problem in that antibacterial effects cannot be obtained. (Objective of the Invention) The present invention has been made in view of these conventional problems, and is capable of effectively exhibiting not only magnetic action but also antibacterial action (including bactericidal action) over a long period of time. The purpose of the present invention is to provide an antibacterial magnet and a method for manufacturing the same.

[Structure of the invention]

(Means for Solving the Problems) The antibacterial magnet according to the present invention is characterized in that a fine-grained magnet and a fine-grained antibacterial ceramic are bonded together by a binder. The magnet is characterized by having an organic or inorganic antibacterial agent on its surface, and the method for producing an antibacterial magnet according to the present invention includes mixing a magnet powder, an antibacterial ceramic powder, and a binder, and then It is characterized by a structure in which an antibacterial magnet is formed by forming and solidifying it, and if necessary, by crushing it after solidification to form a small antibacterial magnet. It is characterized by a structure in which an antibacterial magnet is formed by applying an organic or inorganic antibacterial agent, and these structures are used as means for solving the above-mentioned conventional problems. The antibacterial magnet according to the first to third claims of the present invention has a magnet that provides a magnetic effect, an antibacterial ceramic that provides an antibacterial effect, and a binder that binds these together. The magnet may be selected from among various magnets such as alnico magnets, ferrite magnets, rare earth cobalt magnets, rare earth iron magnets, and Mn-Al alloy magnets, and is not particularly limited. In addition, antibacterial ceramics include aluminosilicates of alkali or alkaline earth metals, 5i02Zr02, A
It is a product in which Ag ions, Cu ions, Zn ions, etc. are incorporated into ceramics selected from various materials such as n, 03, MgO, and TE01. Those that exhibit antibacterial properties (including bactericidal properties) due to the harmful effects of ozone (03) and hydrogen peroxide (H202), which generate active oxygen, are used. Furthermore, when molding is performed by applying heat such as injection molding, extrusion molding, roll molding, etc., the binder may be reinforced vinyl resin, ABS resin, polystyrene, polypropylene, polyamide (nylon), polyacetal, polyethylene terephthalate ( Thermosetting resins such as tetron), polycarbonate, and fluorine resins, or thermosetting resins such as phenolic resins, epoxy, silicone, and polyamides are used. In addition, various materials such as rubber can be used, and there are no particular limitations. In addition, when pouring into a mold or curing at room temperature,
Alternatively, when applying an antibacterial agent as in the fourth and fifth claims of the present invention, a two-component curing method in which a curing agent is added to the main resin is applied. For example, in the case of liquid epoxy resin, In the case of polyester, a ketone peroxide is used as a hardening agent to solidify the bond, and in the case of urethane resin, it is hardened. For acrylic resin, a cyanide compound is used as a curing agent to solidify and bond, and in the case of silicone SL resin, water or alcohol is used as a curing agent. Solidify and bond by condensation reaction. Further, the antibacterial magnet according to the fourth and fifth claims of the present invention mainly includes a magnet that provides a magnetic effect, an organic or inorganic antibacterial agent that provides an antibacterial effect, and, if necessary, a binder. However, in addition to the above-mentioned magnets, plastic magnets and rubber magnets are also used as magnets, organic antibacterial agents such as the benzimidazole type mentioned above are used, and inorganic antibacterial agents are the metals mentioned above. Those using the trace metal action of ions are used. In manufacturing the antibacterial magnet according to the first to third claims of the present invention, after mixing the magnet powder, antibacterial ceramic powder, and binder, press molding,
It is molded by a molding method that is not particularly limited, such as injection molding, extrusion molding, roll molding, cast molding, etc., and fine-grained magnets and fine-grained antibacterial ceramics are bonded by a binder at room temperature or by heating. Obtain an antibacterial magnet. Further, if necessary, the antibacterial magnet is further pulverized to obtain a small granular antibacterial magnet. The preferable component range of the antibacterial magnet according to the first to third claims of the present invention is that the magnet component is 50 to 88% by weight;
More preferably 70 to 85% by weight, antibacterial ceramic component 0.5 to 25% by weight, more preferably 3 to 12% by weight, and binder component 11 to 50% by weight, more preferably 13 to 25% by weight. . In this case, if the magnetic component is too small, the magnetic force will become weak and it will be impossible to obtain the necessary magnetic action, which is undesirable.In order to function as a magnet, the maximum energy product must be at least 0.2 MG fist Oe. The more the magnetic component is, the stronger the magnetic force becomes, which is preferable in terms of magnetic action, but the more the magnetic component is, the more the antibacterial ceramic component and binder component are This is not preferable because the amount of the magnet component decreases, and the magnet component is preferably in the range of 50 to 88% by weight, more preferably 70 to 85% by weight. Also, if the antibacterial ceramic component is small, the antibacterial or bactericidal effect will be weakened, which is undesirable.The more the antibacterial ceramic component is, the stronger the antibacterial effect will be.
A sufficient antibacterial effect can be obtained even if the content is about 1 to 5% by weight, and the higher the content, the more expensive the antibacterial ceramic component is. The content is preferably in the range of 3 to 12% by weight. Furthermore, if the binder component is too low, it will not be possible to obtain a sufficient solidified state, making chipping and cracking more likely, which is undesirable. or the antibacterial effect may decrease, the binder component should be 11 to 50% by weight, more preferably 13 to 25% by weight.
It is preferable to set it in the range of % by weight. The antibacterial magnets according to the first to third claims of the present invention are not limited to those in which the entire magnet contains antibacterial ceramics, but for example, about half of the thickness of a sheet-like antibacterial magnet. It is also included in the present invention, even if one side of the magnet contains antibacterial ceramics and about half of the opposite side only includes a magnet portion that does not contain antibacterial ceramics. The antibacterial magnets according to the first to third claims of the present invention are block-shaped, sheet-shaped, or crushed into small particles as appropriate, and can be used as a single unit in therapeutic instruments, miscellaneous goods, etc. In addition, it can be incorporated into water purifiers, water storage tanks, fish tanks, food containers, therapeutic equipment, medical containers, IJa cargoes, etc. In addition, when manufacturing the antibacterial magnet according to the fourth and fifth claims of the present invention, an organic or inorganic antibacterial agent may be applied as it is or with a binder or diluted agent on the surface of the magnet after molding and sintering. It is mixed with an agent and applied by brushing, spraying, dipping, rubbing, etc. The binder in this case also uses the resin described above. The antibacterial magnet according to the fourth or fifth claim of the present invention is also applied to the various uses mentioned above, and in some cases, if the antibacterial agent is mixed and applied to the surface of the magnet with a binder etc. It also acts as an anti-rust coating. (Function of the invention) Since the antibacterial magnet according to the present invention has the above-described configuration, in addition to the magnet's inherent magnetic action, it has antibacterial properties (including bactericidal properties) based on the trace metal action of metal ions. Antibacterial ceramics and antibacterial agents provide long-term, stable and effective antibacterial action, even though antibacterial magnets that combine fine particles of antibacterial ceramics may wear out or crack during use. Continuous exposure of the antibacterial ceramic provides continuous antibacterial action. (Example) 1 凰■ 30% by weight N crushed to a particle size of 200 lm or less after ultra-quenching
Add 5% by weight of antibacterial ceramic powder (powder containing Cu ions into a SiO2 carrier) and 12% by weight of epoxy resin to d-1.0% by weight B-Fe magnet powder. After mixing, by compression molding with a pressure of 7.0 ton/cm2, it was made into a shape with a diameter of 11 mm and a height of 10 mm.
After obtaining the cylindrical molded body with a diameter of 0 mm, the molded body was cured by heating at 150° C. for 4 hours to prepare an antibacterial magnet. Next, we investigated the characteristics of this antibacterial magnet and a regular magnet made in the same manner as above except that no antibacterial ceramics were added, and the results shown in the robe were obtained. As is clear from the results shown in the table, the antibacterial magnet according to the present invention was found to have excellent antibacterial action without significantly reducing the magnetic action of conventional ordinary magnets. In addition, by crushing the antibacterial magnet described above, it was possible to obtain a small antibacterial magnet with a particle size of about 50 JLm to 5 mm. In Example 1, a cylindrical antibacterial magnet was produced, whereas in Example 2, a sheet-shaped antibacterial magnet with a thickness of 2 mm was produced in substantially the same manner as in Example 1. Further, by crushing the above-mentioned sheet-like antibacterial magnet, it was also possible to obtain a small-sized antibacterial magnet. Real m@3 ZnO2 on the surface of the SmCo5 magnet manufactured by sintering.
Incorporating Ag ions into the powder, the paste was made into a paste using acrylic, further diluted with xylene, and then applied, followed by drying to obtain an antibacterial magnet having an antibacterial agent on the surface of the magnet. This antibacterial magnet also had excellent magnetic and antibacterial effects. (Application example) The small antibacterial magnet prepared in Example 1 was loaded into a cylindrical container, and applied to a simple water purifier that purifies the container by passing water through the container. In addition to the filtration effect of small solid particles (antibacterial magnets), this water purifier uses the magnetic action of the antibacterial magnets to reduce chlorine from about 35 ppm to 20 ppm.
It is possible to reduce the amount of iron to about ppm, remove iron content, and make water milder. 1. In water purifiers that use normal activated carbon, bacteria are likely to grow when the water is not flowing, but when the antibacterial magnet of the present invention is used, its antibacterial action prevents the growth of bacteria, so you can use it when you are not home. Hygienic water can be obtained even when washing. When using the antibacterial magnet according to the present invention in a water purifier,
It is better to set the particle size to about 100JLm100JL; if the particle size is too small, water will not pass through easily, and if the particle size is too large, water will pass through too easily and the above effects will not be fully exerted. Ta. Furthermore, in this water purifier, small antibacterial magnets attract each other through mutual magnetic action, so the particles do not dance or leak outside, and there is no risk of contaminating the water. Ta. Week 1 Day 1〇 By installing a water purifier of the same size or larger size as in Application Example 1 at the water outlet of the water tank, the same effect as in Application Example 1 could be obtained. In addition, the same effect as in Application Example 1 could be obtained by installing a mesh containing small antibacterial magnets at the water outlet of the water tank. In addition, in the water tank of Application Example 2, a remarkable effect was obtained in preventing the growth of algae and limescale. By attaching the sheet-shaped antibacterial magnet prepared in Example 2 to the inner surface of the water tank, it was possible to obtain a water tank with excellent water purification effect. At this time, when the walls of the water tank are made of a ferromagnetic material such as ferromagnetic stainless steel, they can be easily attached and removed by magnetic action, so it can be easily applied to existing water tanks. 1 Riwa A By placing small granular antibacterial magnets at the bottom of the fish tank, or by pasting sheet-shaped antibacterial magnets on the bottom and sides of the fish tank, it is possible to make the fish tank purify water. It was possible. It was also possible to use a block-shaped antibacterial magnet as a magnet. As a result, the magnetic force makes the water smoother, and the antibacterial effect suppresses the growth of algae and other bacteria, and prevents the water from rotting, which lengthens the interval between water changes and makes it more comfortable for fish. A new environment has been created. 1 and 1 Inside the bathtub, by placing small antibacterial magnets in a public register holder and soaking them in hot water, or by pasting sheet-shaped antibacterial magnets on the side walls, etc., the effect of magnetic force can be applied. The promotion of blood circulation was further increased, resulting in a bath with increased bathing effects. Furthermore, the antibacterial effect suppressed the growth of bacteria, which prevented the hot water from spoiling, and it was possible to use the same hot water over and over again without replacing it as long as dirt did not build up. 1ri1 Prevents the growth of mold and bacteria by attaching a sheet-shaped antibacterial magnet to the inside of iron plate food storage containers such as refrigerators and rice storage tanks using its own magnetic action or adhesive. This makes it possible to prevent the contents from spoiling. Application Example 7 The same effect as in Application Example 1 was obtained by attaching a sheet-shaped antibacterial magnet to the inner bottom of a teacup in an exposed state. 1.1 By creating shoe insoles using sheet-shaped antibacterial magnets (thin ones with a thickness of approximately 1 inch), and by using antibacterial magnets attached to leather, it is possible to further improve the quality of shoes. By incorporating a sheet-shaped antibacterial magnet into the inner sole of the shoe during manufacturing, the magnetic effect promotes blood circulation → increases the amount of oxygen in the blood → activates cells → prevents fatigue and promotes health. Prevents the occurrence and proliferation of bacteria due to its antibacterial effect → provides the effect of preventing bad odors and athlete's foot. Application Example 9 By placing a sheet-like antibacterial magnet on the bed, the same promotion of blood circulation as in Application Example 8 and sterilization effect due to antibacterial action can be obtained, and at the same time, it is also effective in preventing sick people from sleeping in bed. This sleeping octopus is caused by blood circulation disorder and the action of bacteria, and the action of magnetic force improves blood circulation.
It has antibacterial properties and is effective in preventing the growth of bacteria. Application Example 10 By attaching the antibacterial magnet of the present invention to a pillow, the magnetism promotes blood circulation, relieves fatigue and stiff shoulders, and prevents the generation of bacteria, which keeps the pillow hygienic and improves sleep quality.
Brings you a good night's sleep.

【Effect of the invention】

The antibacterial magnet according to the first to third claims of the present invention is one in which a fine-grained magnet and a fine-grained antibacterial ceramic are bonded together by a binder. The antibacterial action is short-lived, unlike organic antibacterial agents (including bactericides), because the ceramic powder and binder are mixed, molded, solidified, and crushed as necessary to form small particles. It does not deteriorate over time or decompose or volatilize during the production of magnets, causing antibacterial effects to be lost.It is possible to effectively exert not only magnetic effects but also antibacterial effects over a long period of time. Since the antibacterial ceramic is always exposed even when worn or cracked during use, the antibacterial effect is not impaired, making it possible to provide an antibacterial magnet that maintains stable antibacterial effect. This brings about an extremely excellent effect. Furthermore, the antibacterial magnets according to the fourth and fifth claims of the present invention have an antibacterial agent on the surface of the magnet, and are manufactured by casting, injection molding, press molding, and baking. Since an antibacterial agent is applied to the surface of the magnet after it has been bonded, it is possible to provide an antibacterial magnet that has excellent magnetic and antibacterial effects without impairing the performance of the magnet. effect is brought about. Patent applicant: Daido Steel Co., Ltd.

Claims (5)

[Claims] (1) An antibacterial magnet characterized by a fine-grained magnet and a fine-grained antibacterial ceramic bonded together by a binder. (2) A method for producing an antibacterial magnet, which comprises mixing magnet powder, antibacterial ceramic powder, and a binder, and then molding and solidifying the mixture. (3) A method for producing an antibacterial magnet, which comprises mixing magnet powder, antibacterial ceramic powder, and a binder, shaping and solidifying the mixture, and then pulverizing it into small particles. (4) An antibacterial magnet characterized by having an antibacterial agent on the surface of the magnet. (5) Apply antibacterial agent to the surface of the magnet after sintering. A method for producing an antibacterial magnet, characterized by coating the magnet with antibacterial properties.