Antibacterial glass composition, method of preparing antibacterial glass powder using the same, and home appliance including antibacterial glass composition

Abstract

To provide an antibacterial glass composition that exhibits superior durability and antibacterial performance, and a method for preparing the same.SOLUTION: The present invention provides an antibacterial glass composition comprising: 30 to 70 wt.% of P2O5; 10 to 30 wt.% of MgO; 10 to 35 wt.% of at least one selected from ZnO and WO3; 0.3 to 1 wt.% of MnO2; and 0.4 to 2 wt.% of Ag2O, and being free from K2O, Na2O, and CaO, a method for preparing the same, and a home appliance including the same.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an antimicrobial glass composition and a method for producing the antimicrobial glass powder, and to a home appliance comprising the antimicrobial glass composition. Related Art This application claims priority under Article 4 of the Paris Convention based on Korean Patent Application No. 10-2023-0144888 (filing date: October 26, 2023; DAS: EA46), and the present application is based on the disclosures in that Korean patent application. For reference, the contents of the specification, claims and drawings of that Korean patent application are incorporated herein by reference. [Background technology]

[0002] Microorganisms such as germs, fungi, and bacteria are ubiquitous in our living spaces, such as water purifiers, refrigerators, ovens, washing machines, etc. If microorganisms enter the human body, they can cause life-threatening infections. Therefore, home appliances such as water purifiers, refrigerators, ovens, washing machines, etc. require antibacterial glass compositions that can control the spread of microorganisms.

[0003] Among the parts of these home appliances in which plastic injection molding is used, parts exposed to moisture can grow bacteria and mold, causing problems in appearance and the environment in which they are used.

[0004] The bacteria that live in home appliances are extremely diverse, and although the predominant strains may differ depending on the component, components exposed to moisture are generally more likely to be home to Pseudomonas aeruginosa.

[0005] Therefore, the antibacterial agent must have antibacterial activity against these strains, and must be made of a material that is rigorously selected to have low toxicity to the human body and the environment and high temperature durability.

[0006] Antibacterial agents are largely divided into inorganic and organic types. Organic antibacterial agents have excellent antibacterial properties because they release antibacterial materials to the surface with water, thereby exerting antibacterial power against bacteria. However, their durability may be reduced when used in a washing machine. In addition, in recent years, concerns have been raised about the harmfulness of the released materials to the human body and the environment regarding organic antibacterial agents. In addition, there is a risk of decomposition during the injection process at a low decomposition temperature.

[0007] Inorganic antibacterial agents have a significantly lower elution rate than organic antibacterial agents and can ensure high-temperature durability, but they can cause problems with interfacial wettability with plastic injection molded products, and since Ag is almost always used as the antibacterial material, they are expensive and have limited applicability.

[0008] Antibacterial glass compositions that utilize Ag as an antibacterial component are known, including phosphate-based antibacterial glass compositions that use phosphate as a main component.

[0009] For antibacterial glass compositions containing Ag, it is important to enhance the durability of the antibacterial agent and prevent discoloration. However, if a large amount of Al2O3, which is commonly used, is added to the antibacterial glass composition in order to improve the durability of the antibacterial agent, the antibacterial activity of the antibacterial agent may decrease.

[0010] On the other hand, if Al2O3 is not added to the antibacterial glass composition, a component that lowers the melting point of the antibacterial glass composition must be used in addition, which causes discoloration of Ag. Summary of the Invention [Problem to be solved by the invention]

[0011] An object of the present invention is to provide a novel phosphate-based antibacterial glass composition that exhibits excellent durability and antibacterial performance even without the melting point lowering components and structure strengthening components that cause side effects.

[0012] An object of the present invention is to provide a novel antibacterial phosphate-based glass composition which is capable of preventing discoloration due to reduction of Ag.

[0013] It is also an object of the present invention to provide a novel phosphate-based antimicrobial glass composition with enhanced durability and improved antimicrobial persistence.

[0014] The object of the present invention is not limited to the object mentioned above, and other objects and advantages of the present invention not mentioned can be understood from the following description and can be more clearly understood from the embodiments of the present invention. In addition, it can be easily understood that the object and advantages of the present invention can be realized by the means and combinations thereof as set forth in the claims. [Means for solving the problem]

[0015] The antibacterial glass composition according to the present invention can ensure excellent durability and antibacterial performance even without specific melting point lowering components and structural strengthening components.

[0016] Therefore, the antibacterial glass composition of the present invention utilizes the concept of ionization tendency to combine MnO2 as a melting point lowering component with MgO, ZnO and / or WO3 as structure strengthening components to solve the problems of the conventional technology. The present invention proposes one embodiment of the present invention as follows. [One aspect of the present invention] [Claim 1] 1. An antimicrobial glass composition comprising: 30-70% by weight of P2O5; 10-30 wt% MgO; 10 to 35% by weight of one or more of ZnO and WO3; 0.3 to 1 wt.% MnO2; and 0.4 to 2% by weight of AgO; 1. An antimicrobial glass composition that is free of K2O, Na2O and CaO. [Claim 2] 10. The antimicrobial glass composition of claim 1, further comprising up to 20 wt.% B2O3. [Claim 3] 5 to 35% by weight of the ZnO; and 2. The antimicrobial glass composition of claim 1 comprising: 5 wt.% or less of WO3. [Claim 4] A method for producing an antibacterial glass powder, comprising the steps of: (a) 30-70 wt% P2O5; 10-30 wt% MgO; 10 to 35% by weight of one or more of ZnO and WO3; 0.3 to 1 wt.% MnO2; and Contains 0.4 to 2 wt.% AgO; mixing and stirring the composition, the composition being free of K2O, Na2O and CaO, to form an antimicrobial glass composition; (b) melting the antimicrobial glass composition; (c) cooling the molten antimicrobial glass composition; and (d) grinding the cooled antimicrobial glass. [Claim 5] In the step (a), 5. The method for producing an antibacterial glass powder according to claim 4, wherein the antibacterial glass composition further comprises 20 wt% or less of B2O3. [Claim 6] In the step (a), The antibacterial glass composition comprises: 5 to 35% by weight of the ZnO; and The method for producing an antibacterial glass powder according to claim 4, wherein the WO3 is contained in an amount of 5 wt% or less. [Claim 7] In the step (b), 5. The method for producing an antibacterial glass powder according to claim 4, wherein the melting is carried out at 1,100 to 1,400° C. for 1 to 60 minutes. [Claim 8] A home appliance, The device comprises a plastic injection molded product having antibacterial glass powder added to a resin material, The plastic injection molding 95.0 to 99.0% by weight of the resin material; and The antibacterial glass powder is contained in an amount of 1.0 to 5.0% by weight. The antibacterial glass powder is 30-70% by weight of P2O5; 10-30 wt% MgO; 10 to 35% by weight of one or more of ZnO and WO3; 0.3 to 1 wt.% MnO2; and Contains 0.4 to 2% by weight of AgO; Household appliances that do not contain K2O, Na2O or CaO. [Claim 9] 9. The home appliance according to claim 8, wherein the resin material includes at least one of PP (polypropylene), PC (polycarbonate), EPDM (ethylene propylene rubber), ABS (acrylonitrile-butadiene-styrene), and HIPS (high impact polystrene). [Claim 10] 9. The home appliance of claim 8, wherein the antibacterial glass powder further comprises B2O3 in an amount of 20% by weight or less. [Claim 11] The antibacterial glass powder is 5 to 35% by weight of the ZnO; and 9. The home appliance of claim 8, containing 5% by weight or less of the WO3.

[0017] Specifically, the antibacterial glass composition according to the present invention contains 30-70 wt% P2O5; 10-30 wt% MgO; 10-35 wt% of one or more of ZnO and WO3; 0.3-1 wt% MnO2; and 0.4-2 wt% Ag2O; and does not contain K2O, Na2O, or CaO.

[0018] The method for producing the antibacterial glass powder according to the present invention includes the steps of forming the above-mentioned antibacterial glass composition, melting, cooling and pulverizing.

[0019] Next, the home appliance of the present invention includes an injection molded product in which antibacterial glass powder is added to a resin material. Effect of the Invention

[0020] According to the present invention, it is possible to provide a phosphate-based antibacterial glass composition that exhibits excellent durability and antibacterial performance even without the melting point lowering components and structure strengthening components that cause side effects.

[0021] Furthermore, according to the present invention, by removing melting point lowering components and structure strengthening components which cause side effects, discoloration due to reduction of Ag can be prevented, and yet a phosphate-based antibacterial glass composition which exhibits excellent durability and antibacterial performance can be provided.

[0022] Furthermore, according to the present invention, it is possible to provide a novel phosphate-based antibacterial glass composition having enhanced durability and improved antibacterial durability.

[0023] The above-mentioned effects and specific effects of the present invention will be described in conjunction with the following description of the preferred embodiment of the invention. [Brief description of the drawings]

[0024] [Figure 1] FIG. 2 is a process flow diagram showing a method for producing an antibacterial glass powder according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] The above-mentioned objects, features and advantages will be described in detail below with reference to the accompanying drawings, so that those skilled in the art to which the present invention pertains can easily implement the technical concept of the present invention. In describing the present invention, if a detailed description of known techniques according to the present invention is deemed to obscure the gist of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings are used to indicate the same or similar components.

[0026] As used herein, singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "include" should not be interpreted as including all of the multiple components or multiple steps described in the specification, but should be interpreted as including some of the components or steps that may not be included, or may further include additional components or steps.

[0027] Hereinafter, the antibacterial glass composition and the method for producing the antibacterial glass powder according to some embodiments of the present invention, and the home appliance including the same will be described.

[0028] Antibacterial glass composition The antibacterial glass composition according to the embodiment of the present invention exhibits excellent durability and antibacterial performance even without the melting point lowering component and structure strengthening component that cause side effects.

[0029] The antibacterial glass composition of the present invention is a phosphate-based glass composition containing 30-70 wt% P2O5; 10-30 wt% MgO; 10-35 wt% of one or more of ZnO and WO3; 0.3-1 wt% MnO2; and 0.4-2 wt% Ag2O, but does not contain K2O, Na2O, or CaO.

[0030] The antibacterial glass composition of the present invention may further contain 20% by weight or less of B2O3, and preferably contains 5 to 35% by weight of the ZnO and 5% by weight or less of the WO3.

[0031] Hereinafter, the function and content of each component of the antibacterial glass composition according to the embodiment of the present invention will be described in detail.

[0032] P2O5 and B2O3 In antibacterial glass compositions, the selection of a matrix containing silver (Ag) should take into consideration the electrochemical properties and the structural aspects of the glass. Silver has a high reducibility due to its tendency to ionize. Therefore, the vitrification of antibacterial glass compositions containing silver is influenced by the types of glass-forming oxides and modifier oxides.

[0033] Generally, ionization tendency is known mainly for alkali-alkaline earth components. Here, silver is known to be an element with high reducibility and low ionization tendency. However, in the present invention, the tendency in the electrophilic region, not the nucleophilic region, is important. Considering the region connected in the order of Ag-Pt-Au-Si-Ti-Ta-CW-Mo-VP, silver and Si have similar ionization tendency and have less non-bridging oxygen, so silicate-based glass is disadvantageous for containing silver.

[0034] Therefore, Ag in the P2O5-(B2O3)-based matrix is ​​advantageous for stable vitrification by ions.

[0035] P2O5 and B2O3 are typical network-forming oxides that enable the vitrification of antibacterial glass compositions. From the structural aspect of glass, these are components that act as frameworks. Although both components have good vitrification ability even when used alone at 100% by weight, these glasses are hygroscopic to moisture and have low durability.

[0036] In particular, when both components are used together, the structure of the glass becomes denser and the durability of the glass can be slightly increased.

[0037] In the present invention, since P2O5 and B2O3 are low melting point substances and network forming oxides, when they are added in a total amount of less than 50% by weight, they will be out of the vitrification range, such as unmelted / immiscible. When P2O5 and B2O3 are added in an amount of more than 70% by weight, the durability of the glass will decrease and it will be easily dissolved in water. Therefore, although the glass has sufficient antibacterial activity at the beginning, the antibacterial substance and matrix will dissolve in water over time, making it impossible to use for a long period of time.

[0038] Therefore, the antibacterial glass composition of the present invention contains 30 to 70% by weight of P2O5, and may contain 20% by weight or less of B2O3.

[0039] MgO, MnO2 and Ag2O Next, the antibacterial glass composition of the present invention contains MgO, MnO2 and Ag2O as modifier oxides.

[0040] The modifier oxide is an ionically bonded component which cannot be vitrified by itself, but which is located between the covalent bonds forming glass as one component of glass and affects the properties of the glass.

[0041] When selecting other components in a glass component system containing silver, the ionization tendency is an important factor. In the parent nucleus region K-Ca-Na-Mg-Al-Zn-Fe-Ni-Sn-Pb-(H)-Cu-Hg-Ag-Pt, K, Na and Ca have high ionization tendencies and can reduce silver inside the glass or when dissolved outside the glass. Therefore, in this development, the use of K2O, Na2O and CaO was excluded.

[0042] First, MgO, unlike CaO, strengthens the durability and increases the melting point of phosphate-based glass due to the strength of its single bond with oxygen and its ionic size. For this reason, MgO is usually used together with alkali metals and CaO in phosphate-based glass. In the present invention, other solutions are used to lower the melting point. In the present invention, the use of Na2O, K2O, and CaO is eliminated, and MgO strengthens the structure of the antibacterial glass composition of the present invention. MgO exists as a modifying oxide in glass and acts to increase non-bridging oxygen. However, since the bond strength of Mg-O is strong and the size of the Mg+ ion is smaller than that of Na+, K+, and Ca+, it has the characteristic of being less eluted in water and improving durability. In the initial reaction by the replacement of the H3O+ ion with the ionic bonding material of glass, which is the core mechanism of dissolution into water, H3O+, Ca+, Na+, K+, and Ag+ have similar ionic sizes, making it easy to dissolve by replacement.

[0043] The antibacterial glass composition of the present invention contains 10 to 30% by weight of MgO. If the content of MgO is less than 10% by weight, the effect of increasing durability obtained by the bonding strength of Mg-O is small, and antibacterial durability decreases. If the content of MgO exceeds 30% by weight, the melting point of the glass increases significantly, and unmelted material occurs.

[0044] Next, MnO2 in the present invention is used as a modifying oxide and is often used in glasses related to electromagnetic properties. The present invention utilizes the property that MnO2 improves the mobility of ions in the glass or molten state of the antibacterial glass composition. When the mobility of ions is improved in the molten state of the antibacterial glass composition, the viscosity of the glass is significantly reduced, and the melting point is thereby reduced. In addition, Ag ions, which are difficult to maintain in an ionic state, are uniformly distributed. This prevents the phenomenon of Ag ions agglomerating and then Ag being reduced.

[0045] The antibacterial glass composition of the present invention contains 0.3 to 1 wt% MnO2. When less than 0.3 wt% MnO2 is added, the effect of lowering the melting point and the effect of improving the ion mobility on the molten liquid are insufficient. This causes the phenomenon of Zn / Mg immiscibility in the antibacterial glass composition. On the other hand, when 1 wt% or more MnO2 is added, the antibacterial agent turns black due to the change in the valence of Mn, which limits its use as a general-purpose white / colorless additive.

[0046] Next, Ag is a component that shows a typical antibacterial activity. In glass, Ag exists in the form of modified oxide in the Ag+ state. Adding a large amount of Ag has the advantage of increasing the antibacterial activity, but it also has the disadvantages of reducing the durability of the antibacterial agent, discoloration, and being expensive.

[0047] The antibacterial glass composition of the present invention contains 0.4 to 2 wt% Ag2O. When the Ag2O is added at 0.4 wt%, the amount of Ag+ ions eluted is insufficient, and sufficient antibacterial activity is not exhibited. When the Ag2O content exceeds 2 wt%, the Ag content falls outside the vitrification range, and there is a problem that Ag is reduced to metal and precipitates inhomogeneously.

[0048] ZnO and WO3 The antibacterial glass composition of the present invention contains at least one of ZnO and WO3 as intermediate oxides in an amount of 10 to 35% by weight.

[0049] The intermediate oxide means a component which substitutes for a part of the network-forming oxide, forms a covalent bond, and can function both as a network-forming oxide and as a modifying oxide.

[0050] From the structural aspect of glass, ZnO is a component that functions both as a network former and as a modifying oxide. In addition, ZnO in the present invention is a key component that exerts antibacterial effects. The present invention excludes alkaline oxides. In this way, in a composition in which alkaline oxides are excluded, the structure of ZnO is determined by P2O5 / B2O3, and the covalent bond of O-Zn-O and Zn 2+ Ionic bonds are mixed. Such a structure creates a local positive charge that is different from the negative charge that is the normal state of bacteria. The bacteria are subjected to oxidative stress when ROS produced by such a structure is added. In the present invention, although ZnO is not the main component that exhibits antibacterial properties, it complements the antibacterial properties of Ag and complements the antibacterial power from the aspect of antibacterial sustainability. Therefore, the present invention can use an appropriate amount of Ag, unlike the conventional technology that introduces a high content of Ag to exert antibacterial sustainability, which brings about the risk of discoloration.

[0051] Furthermore, the covalent bond between O-Zn-O and Zn 2+ In the state where ionic bonds are mixed, nano ZnO exerts an effect similar to that of a ceramic material that exhibits ionic characteristics. In this state, it exerts an antioxidant effect, and the antioxidant performance does not decrease even in the absence of local alkaline oxides.

[0052] Next, although WO3 is an intermediate oxide, it has a high single bond strength with oxygen and is a component close to glass-forming oxides. In the present invention, the durability of glass is improved by the POW bond. The POW bond improves the hardness of the glass, so that when crushed, it becomes needle-shaped, unlike the usual wavy powder. When a needle-shaped antibacterial agent is applied to an application, dispersibility and floating properties are improved. In addition, W is an electrophilic substance due to its ionization tendency, and it maintains Ag in the Ag+ state. Therefore, W prevents the reduction of silver both in the glass and when it is dissolved from the glass. This means that it can exhibit antioxidant performance.

[0053] In the present invention, when ZnO and WO3 are added in an amount of less than 10% by weight, the durability of the antibacterial agent is reduced, the antibacterial durability is reduced, and the antioxidant performance is reduced.On the other hand, when ZnO and WO3 are added in an amount of more than 35% by weight, the melting point of the glass is greatly increased, and unmelted material may be generated.

[0054] More preferably, the antibacterial glass composition of the present invention may contain 5 to 35% by weight of the ZnO and 5% by weight or less of the WO3.

[0055] Phosphate-based glass such as the antibacterial glass composition of the present invention is characterized by being hygroscopic and easily soluble in water. The most commonly used phosphate-based glass antibacterial agent utilizes Al2O3 (or ZrO2) to improve durability. The glass structure is strengthened to PO-Al, and the non-bridging oxygen is reduced, and the glass is strengthened. At this time, the problem of an increase in melting point occurs. Also, a method of adding ZnO is used to prevent discoloration of silver-containing glass due to the reduction of Ag+ → Ag0. When a small amount of ZnO is added to phosphate-based glass, it does not interfere with the melting point, but when a large amount is added to prevent discoloration, the melting point of the glass is increased. In phosphate-based glass containing silver, alkali metals (Na2O, K2O) and alkaline earth metals (CaO) are generally used to lower the melting point. The presence of these alkali metals or alkaline earth metals promotes the reaction of Ag+ → Ag0, which causes silver to discolor. As a result, silver precipitation or reduction occurs during the vitrification process. Therefore, when Na2O, K2O, and CaO are used in phosphate-based glass, problems such as discoloration of silver and lack of durability occur.

[0056] The present invention provides a novel antimicrobial glass composition that overcomes the chronic problems of silver tarnishing and reduced durability in designing silver-containing phosphate-based glasses.

[0057] Due to the above-mentioned component / structural features, the antibacterial glass composition of the present invention is prevented from discoloring and has improved antibacterial durability compared to conventional silver-based glasses.

[0058] Manufacturing method of antibacterial glass powder DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method for producing an antibacterial glass powder according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0059] FIG. 1 is a process flow diagram showing a method for producing an antibacterial glass powder according to an embodiment of the present invention.

[0060] As shown in FIG. 1, a method for producing an antibacterial glass powder according to an embodiment of the present invention includes a mixing step (S110), a melting step (S120), a cooling step (S130), and a grinding step (S140).

[0061] mixture In the mixing step (S110), the antimicrobial glass composition is formed, and the characteristics of the antimicrobial glass composition are as described above.

[0062] Melting In the melting step (S120), the antimicrobial glass composition is melted.

[0063] In this stage, melting is preferably carried out at 1,100 to 1,400°C for 1 to 60 minutes. If the melting temperature is less than 1,100°C or the melting time is less than 1 minute, the antibacterial glass composition is not completely melted, which may cause immiscibility of the molten glass. Conversely, if the melting temperature exceeds 1,400°C or the melting time exceeds 60 minutes, excessive energy and time are required, which is not economical.

[0064] cooling In the cooling step (S130), the molten antibacterial glass composition is cooled to room temperature.

[0065] In this stage, cooling is preferably performed in a furnace. When air cooling or water cooling is applied, excessive internal stress of the antibacterial glass may be formed, which may cause cracks in some cases, so cooling in a furnace is preferred.

[0066] Crushing In the pulverization step (S140), the cooled antibacterial glass is pulverized by using any of commonly known mills such as a ball mill, a jet mill, and a planetary mill.

[0067] The antibacterial glass is finely pulverized by these grinding processes to produce antibacterial glass powder, which preferably has an average diameter of 30 μm or less, and more preferably has an average diameter of 2 to 12 μm.

[0068] home appliances Meanwhile, a home appliance according to an embodiment of the present invention includes a resin material and a plastic injection molded product in which the antibacterial glass powder manufactured by the above-mentioned method is added to the resin material. The home appliance used in the present invention may include, but is not limited to, a water purifier, a washing machine, a stand air conditioner, a system air conditioner, a refrigerator, etc.

[0069] Here, the plastic injection product contains 95.0 to 99.0% by weight of a resin material and 1.0 to 5.0% by weight of antibacterial glass powder.

[0070] When the amount of antibacterial glass powder is added in a small amount, less than 1.0 wt % of the total weight of the plastic injection molding, the antibacterial activity against Pseudomonas aeruginosa may be insufficient, whereas when the amount of antibacterial glass powder is added in an excessive amount, more than 5.0 wt % of the total weight of the plastic injection molding, the mechanical properties may be deteriorated.

[0071] The resin material includes at least one of PP (polypropylene), PC (polycarbonate), EPDM (ethylene propylene rubber), ABS (acrylonitrile-butadiene-styrene), and HIPS (high impact polystrene).

[0072] In this case, the components of the antibacterial glass powder are the same as those of the above-mentioned antibacterial glass composition.

[0073] In addition to the antibacterial glass powder, the plastic injection product may further contain functional additives, which may include one or more selected from the group consisting of antioxidants, foaming agents, impact modifiers, nucleating agents, and coupling agents.

[0074] As a result, the home appliance according to the embodiment of the present invention has antibacterial properties that can prevent the habitation and growth of various microorganisms when applied to the surfaces of parts that are susceptible to bacterial growth and that are frequently in contact with moisture.

[0075] The antibacterial glass powder of the present invention can be used not only for injection molding, but also as a coating material for glass shelves, and as an additive for paints and powder coatings.

[0076] Working Example The present invention will be described in more detail below with reference to preferred embodiments thereof, however, these are merely preferred examples of the present invention and should not be construed as limiting the present invention in any way.

[0077] Contents not described here will not be explained since those skilled in the art can easily deduce them from a technical standpoint.

[0078] 1. Preparation of antibacterial glass powder samples Table 1 shows the compositions and composition ratios of the antibacterial glass compositions of the examples and comparative examples.

[0079] The antibacterial glass compositions having the compositions described in the above Examples and Comparative Examples were melted in an electric furnace at a temperature of 1,200°C, and then cooled to a glass bulk form on a stainless steel plate by air cooling. The obtained glass was then pulverized in an air mill to produce antibacterial glass powder samples having a D50 particle size of 2 to 12 μm.

[0080] Here, for raw materials containing Ag2O, one of AgNO3, Ag3PO4, and Ag2O is used after stoichiometric calculation. The remaining components are the same as those shown in the table or are compounds of mixed components. The remaining components are the same as those listed in Tables 1 and 2. Vitrification is classified based on whether the material exhibits homogeneous glass properties or the phenomenon of milkiness and the occurrence of unmelted material.

[0081] [Table 1]

[0082] 2. Evaluation of the physical properties of antibacterial glass powder Table 2 shows the results of evaluating the physical properties of the samples prepared according to the examples and comparative examples.

[0083] 1) Antibacterial activity measurement For the examples and comparative examples in which uniform vitrification was performed, antibacterial evaluation was performed on four bacteria (Staphylococcus aureus, Escherichia coil, Klesiella puenmoniae, Pseudomonas aeruginosa) using the shake flask method (ASTM E2149-13a).

[0084] 2) After durability evaluation, antibacterial activity was measured In order to evaluate the durability of the homogeneously vitrified examples and comparative examples, the samples were exposed to moisture according to ASTM C1285-14 (durability evaluation method for glass and glass ceramics) and then the antibacterial activity test was further carried out (50°C, 32 hours).

[0085] [Table 2]

[0086] As shown in Table 2, the samples prepared according to Examples 1 to 5 showed antibacterial activity of 99% or more against all four bacteria. Moreover, the samples prepared according to Examples 1 to 5 showed antibacterial activity of 99% or more when exposed to moisture according to a durability evaluation method.

[0087] On the other hand, in the case of the comparative examples, Comparative Example 4, vitrification was not uniformly carried out.

[0088] Incidentally, none of the samples produced according to Comparative Examples 1 to 4 exhibited good antibacterial activity against any of the four bacteria.

[0089] Although the present invention has been described above with reference to the illustrative drawings, the present invention is not limited to the embodiments and drawings disclosed in this specification, and it is clear that various modifications can be made by those skilled in the art within the scope of the technical concept of the present invention. Furthermore, even if the effects of the configuration of the present invention are not explicitly described in the above-mentioned embodiments of the present invention, it is natural that the effects that can be predicted by the configuration should also be recognized. [Explanation of symbols]

[0090] S110: Mixing stage S120: Melting stage S130: Cooling stage S140: Crushing stage

Claims

1. 1. An antimicrobial glass composition comprising: P ２ O ５ 30 to 70% by weight; 10-30% by weight of MgO; ZnO and WO ３ 10 to 35% by weight of one or more of the following: MnO ２ 0.3 to 1% by weight; and Ag ２ 0.4 to 2% by weight O; K ２ O, Na ２ An antimicrobial glass composition that is free of O and CaO.

2. B ２ O ３ The antimicrobial glass composition of claim 1 further comprising up to 20 wt.% of

3. ZnO in an amount of 5 to 35% by weight; and The WO ３ 2. The antimicrobial glass composition of claim 1 comprising up to 5 wt.% of

4. A method for producing an antibacterial glass powder, comprising the steps of: (a) P ２ O ５ 30 to 70% by weight; 10-30% by weight of MgO; ZnO and WO ３ 10 to 35% by weight of one or more of the following: MnO ２ 0.3 to 1% by weight; and Ag ２ 0.4 to 2% by weight of O; K ２ O, Na ２ mixing and stirring the composition, free of O and CaO, to form an antimicrobial glass composition; (b) melting the antimicrobial glass composition; (c) cooling the molten antimicrobial glass composition; and (d) grinding the cooled antimicrobial glass.

5. In the step (a), The antibacterial glass composition is B ２ O ３ The method for producing an antibacterial glass powder according to claim 4, further comprising up to 20% by weight of

6. In the step (a), The antibacterial glass composition comprises: ZnO in an amount of 5 to 35% by weight; and The WO ３ The method for producing an antibacterial glass powder according to claim 4, wherein the antibacterial glass powder contains 5 wt% or less of the above.

7. In the step (b), The method for producing an antibacterial glass powder according to claim 4, wherein the melting is carried out at 1,100 to 1,400°C for 1 to 60 minutes.

8. A home appliance, The device comprises a plastic injection molded product having antibacterial glass powder added to a resin material, The plastic injection molding 95.0 to 99.0% by weight of the resin material; and The antibacterial glass powder is present in an amount of 1.0 to 5.0% by weight. The antibacterial glass powder is P ２ O ５ 30 to 70% by weight; 10-30% by weight of MgO; ZnO and WO ３ 10 to 35% by weight of one or more of the following: MnO ２ 0.3 to 1% by weight; and Ag ２ 0.4 to 2% by weight of O; K ２ O, Na ２ A household appliance that is free of O and CaO.

9. The home appliance of claim 8, wherein the resin material includes at least one of PP (polypropylene), PC (polycarbonate), EPDM (ethylene propylene rubber), ABS (acrylonitrile-butadiene-styrene), and HIPS (high impact polyethylene).

10. The antibacterial glass powder is B ２ O ３ The home appliance of claim 8, further comprising 20% ​​by weight or less of

11. The antibacterial glass powder is ZnO in an amount of 5 to 35% by weight; and The WO ３ The household appliance according to claim 8, comprising 5% by weight or less.

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