Antibacterial glass composition, method for manufacturing antibacterial glass powder using same, and domestic appliance including same

Abstract

The present invention relates to an antibacterial glass composition, a method for manufacturing an antibacterial glass powder using same, and a domestic appliance including same. The antibacterial glass composition according to the present invention, comprises: 55-75 wt% of P2O5 and B2O3 in total; 12-25 wt% of at least one among ZnO and WO3; 0.4-3 wt% of MoO3; and 0.4-3 wt% of Ag2O, and does not comprise K2O, Na2O, or CaO. Accordingly, the present invention can provide a phosphate-based antibacterial glass composition that exhibits excellent durability and antibacterial performance, even without the inclusion of a melting point-lowering component or structure-reinforcing component that causes harmful effects.

Description

Antibacterial glass composition and method for producing antibacterial glass powder thereof, and home appliances comprising the same

[0001] The present invention relates to an antibacterial glass composition and a method for producing an antibacterial glass powder thereof, and to a home appliance comprising the same.

[0002]

[0003] Microorganisms such as germs, fungi, and bacteria are ubiquitous in our living spaces, including water purifiers, refrigerators, ovens, and washing machines. If these microorganisms enter the human body, they can cause life-threatening infections. Therefore, an antimicrobial glass composition capable of controlling the spread of microorganisms in home appliances such as water purifiers, refrigerators, ovens, and washing machines is in demand.

[0004] In these home appliances, bacteria and mold can grow in parts made of plastic that are exposed to moisture, causing problems with the appearance or the user environment.

[0005] The fungi that inhabit home appliances are very diverse, and the main strains may differ depending on the part, but parts exposed to moisture are generally more likely to harbor Pseudomonas aeruginosa.

[0006] Therefore, antimicrobial agents must ensure antibacterial efficacy against these strains. Furthermore, antimicrobial agents must be carefully selected from materials with low toxicity to humans and the environment and high-temperature resistance.

[0007] Antibacterial agents can be broadly categorized into inorganic and organic. Organic antibacterial agents exhibit excellent antibacterial properties because they release antibacterial materials onto the surface of the device in water, exerting their antibacterial activity against bacteria. However, their durability may be reduced when applied to washing machines. Furthermore, concerns have been raised about the human and environmental hazards of the extracted materials. Furthermore, their low decomposition temperature poses a risk of decomposition during the injection molding process.

[0008] Inorganic antibacterial agents have significantly lower solubility than organic antibacterial agents and can secure high-temperature durability, but they can cause interfacial wetting problems with plastic injection molded products and are often expensive because Ag is used as the antibacterial material, which limits their application.

[0009] Antibacterial glass compositions utilizing silver as an antibacterial component are known. Among these, phosphate-based antibacterial glass compositions utilizing phosphate as a primary component are known.

[0010] Antimicrobial glass compositions containing Ag are important for enhancing the durability of antimicrobial agents and preventing discoloration. However, adding large amounts of Al2O3, commonly used to enhance the durability of antimicrobial agents, to antimicrobial glass compositions can reduce the antimicrobial agent's antimicrobial activity.

[0011] On the other hand, if Al2O3 is excluded from the antibacterial glass composition, a component that lowers the melting point of the antibacterial glass composition must be used together, but this causes discoloration of Ag.

[0012]

[0013] The purpose of the present invention is to provide a novel phosphate-based antibacterial glass composition exhibiting excellent durability and antibacterial performance, even without melting point lowering components and structural strengthening components that cause side effects.

[0014] In addition, the purpose of the present invention is to provide a novel phosphate-based antibacterial glass composition capable of preventing discoloration due to reduction of Ag.

[0015] In addition, it is an object of the present invention to provide a novel phosphate-based antibacterial glass composition having enhanced durability and improved antibacterial persistence.

[0016] The objectives of the present invention are not limited to those mentioned above. Other objectives and advantages of the present invention not mentioned above can be understood through the following description and will be more clearly understood through the embodiments of the present invention. Furthermore, it will be readily apparent that the objectives and advantages of the present invention can be realized by the means and combinations thereof set forth in the claims.

[0017]

[0018] The antibacterial glass composition according to the present invention can secure excellent durability and antibacterial performance even without specific melting point lowering components and structural strengthening components.

[0019] To this end, the antibacterial glass composition according to the present invention solves the problems of the prior art by grafting MoO3 as a melting point lowering component and MgO, ZnO and / or WO3 as a structural strengthening component by utilizing the ionization tendency concept.

[0020] Specifically, the antibacterial glass composition according to the present invention contains 55 to 75 wt% of P2O5 and B2O3 combined, 12 to 25 wt% of MgO, 12 to 25 wt% of at least one of ZnO and WO3, 0.4 to 3 wt% of MoO3, and 0.4 to 3 wt% of Ag2O, and does not contain K2O, Na2O, and CaO.

[0021] In addition, the method for manufacturing an antibacterial glass powder according to the present invention includes forming the above-described antibacterial glass composition and melting, cooling, and crushing steps.

[0022] Next, the home appliance of the present invention includes an injection molded product in which antibacterial glass powder is added to a resin material.

[0023]

[0024] According to the present invention, even without the melting point lowering component and the structural strengthening component causing side effects, a phosphate-based antibacterial glass composition exhibiting excellent durability and antibacterial performance can be provided.

[0025] In addition, according to the present invention, by excluding a melting point lowering component and a structural strengthening component that cause side effects, discoloration due to reduction of Ag can be prevented, and a phosphate-based antibacterial glass composition exhibiting excellent durability and antibacterial performance can be provided.

[0026] In addition, according to the present invention, a novel phosphate-based antibacterial glass composition with enhanced durability and improved antibacterial persistence can be provided.

[0027]

[0028] In addition to the effects described above, specific effects of the present invention are described below while explaining specific details for carrying out the invention.

[0029]

[0030] Figure 1 is a process flow diagram showing a method for manufacturing antibacterial glass powder according to an embodiment of the present invention.

[0031]

[0032] The above-described objects, features, and advantages will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can easily practice the technical idea of ​​the present invention. In describing the present invention, if it is determined that a detailed description of known technologies related to the present invention may unnecessarily obscure the gist of the present invention, a detailed description thereof will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

[0033] As used herein, singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as "consisting of" or "comprising" should not necessarily be construed to include all of the components or steps described in the specification, and should be construed to mean that some of the components or steps may not be included, or that additional components or steps may be included.

[0034] Hereinafter, an antimicrobial glass composition and a method for producing an antimicrobial glass powder according to some embodiments of the present invention, and a home appliance including the same will be described.

[0035]

[0036] Antibacterial glass composition

[0037]

[0038] The antimicrobial glass composition according to an embodiment of the present invention exhibits excellent durability and antimicrobial performance even without the melting point lowering component and the structural strengthening component causing side effects.

[0039]

[0040] The antibacterial glass composition of the present invention is a phosphate-based glass composition, which contains 55 to 75 wt% of P2O5 and B2O3 in total, 12 to 25 wt% of MgO, 12 to 25 wt% of at least one of ZnO and WO3, 0.4 to 3 wt% of MoO3, and 0.4 to 3 wt% of Ag2O, and does not contain K2O, Na2O, and CaO.

[0041] In addition, the antibacterial glass composition of the present invention may include 20 wt% or more of the P2O5, and preferably 12 to 22 wt% of the ZnO and 5 wt% or less of the WO3.

[0042]

[0043] Hereinafter, the role and content of each component of the antibacterial glass composition according to an embodiment of the present invention will be described in detail.

[0044]

[0045] <P2O5및 B2O3>

[0046] In antimicrobial glass compositions, the selection of a matrix for containing silver (Ag) must take into account electrochemical properties and structural aspects of the glass. Silver has a high reducibility in terms of ionization tendency. Therefore, the vitrification of antimicrobial glass compositions containing silver is influenced by the types of glass-forming oxides and modifying oxides.

[0047] In general, the ionization tendency is known to be centered around alkaline-alkaline earth components. Here, silver is known as an element with high reducibility and low ionization tendency. However, in the present invention, the tendency in the electrophile region, not the nucleophile region, is important. Considering the region in the order of Ag - Pt - Au - Si - Ti - Ta - C - W - Mo - V - P, silver and Si have similar ionization tendencies and relatively low non-bridging oxygen, so silicate glasses are disadvantageous in containing silver.

[0048] Therefore, in the P2O5-B2O3 matrix, Ag is advantageous in being stably vitrified as an ion.

[0049]

[0050] P2O5 and B2O3 are representative network-forming oxides that enable vitrification of antibacterial glass compositions. They serve as the structural framework for glass. While both components exhibit excellent vitrification properties even when used alone at 100 wt%, these glasses exhibit low durability due to their hygroscopicity.

[0051] Especially when the two components are used together, the glass structure becomes denser, which can slightly increase the durability of the glass.

[0052] In the present invention, since P2O5 and B2O3 are low-melting substances and network-forming oxides, if the total amount added is less than 55 wt%, the glass will not melt / be miscible, and thus will go beyond the vitrification range. Furthermore, if P2O5 and B2O3 are added in excess of 75 wt%, the durability of the glass will deteriorate and it will easily dissolve in water. Therefore, although the glass initially has sufficient antibacterial properties, over time, the antibacterial substances and matrix will dissolve in water, making it unusable for long-term use.

[0053] To this end, the antimicrobial glass composition of the present invention comprises 55 to 75 wt% of P2O5 and B2O3. Preferably, the antimicrobial glass composition of the present invention may also comprise 20 wt% or more of P2O5.

[0054]

[0055] <MgO, MnO2및 Ag2O>

[0056] Next, the antibacterial glass composition of the present invention includes MgO, MoO3, and Ag2O as formula oxides.

[0057] A formula oxide is an ionic bond component that cannot be vitrified on its own, but is located between the covalent bonds that form glass as a component of glass and affects the properties of the glass.

[0058]

[0059] When selecting other components in a silver-containing glass composition system, ionization tendency is an important factor. In the nucleophilic region of 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 within the glass or in the dissolved state outside the glass. Therefore, the use of K2O, Na2O, and CaO was excluded in this development.

[0060]

[0061] First, although MgO is an alkaline earth metal, it strengthens the durability of phosphate glass and increases the melting point, unlike CaO, due to the single bond strength with oxygen and the influence of ion size. Accordingly, MgO is usually used together with alkali metals or CaO in phosphate glass. The present invention utilizes another solution for lowering the melting point. Since the present invention excludes the use of Na2O, K2O, and CaO, the antibacterial glass composition of the present invention uses MgO to strengthen the structure of the glass. MgO exists as a modifier oxide in the glass and plays a role in increasing non-bridging oxygen. However, since the bond strength of Mg-O is strong and the size of Mg+ ions is smaller than that of Na+, K+, and Ca+, it has the characteristic of having low dissolution characteristics in water and improving durability. The key mechanism of dissolution in water is the initial reaction by substitution of H3O+ ions and ionic bonding substances in the glass. H3O+ and Ca+, Na+, K+, and Ag+ have similar ion sizes, so dissolution by substitution is easy.

[0062] The antibacterial glass composition of the present invention contains 12 to 25 wt% of MgO. When the MgO content is less than 12 wt%, the durability enhancement effect obtained by the Mg-O bond strength is minimal, resulting in reduced antibacterial durability. When the MgO content exceeds 25 wt%, the melting point of the glass increases significantly, resulting in unmelted glass.

[0063]

[0064] Next, MoO3 functions as a network-forming oxide when added in large amounts to the glass composition, but when MoO3 is used in small amounts as in the present invention, the MoO3 functions as a modifier oxide that breaks the bridging oxygen of the network-forming oxide and forms non-bridging oxygen. The behavior of MoO3 in the glass plays a very important role in the present invention. MoO3 has a high bond valence with oxygen in the glass. Therefore, MoO3 cannot share oxygen with the network-forming oxide and bond. If the bond valence with oxygen is 2 or more, it theoretically means that the oxygen atom is strongly over-bonded. Therefore, MoO3 shares oxygen with the cation of the modifier oxide and breaks the bridging oxygen of the network-forming oxide and forms a cluster-like group. In the present invention, Mg + , Ag + , Zn 2+ In the vicinity of MoO3, they are arranged like clusters. The region where MoO3 forms a cluster structure is a region rich in non-bridging oxygen. Therefore, the region where MoO3 forms a cluster structure is easily dissolved in water. In addition, Mo has a high reducing property compared to Ag in terms of ionization tendency. Therefore, in the present invention, Mo can play an important role in glassifying Ag into an ionic state, and Mo can play an important role in glassifying Ag. + It exists adjacent to and exhibits an effect efficiently. When MoO3 is present in the composition of the present invention at less than 0.4 wt%, the melting point is lowered and the reduction inhibition ability of silver is lowered, resulting in non-homogeneous precipitation of Ag. When MoO3 exceeds 3.0 wt% in the composition of the present invention, the color of the glass loses transparency and begins to turn black, limiting the applicability of the glass. In addition, when MoO3 exceeds 3.0 wt% in the composition of the present invention, the water resistance of the glass is reduced.

[0065]

[0066] Next, silver (Ag) is a representative antibacterial component. In glass, silver exists in the form of a modified oxide (Ag+). While adding large amounts of silver enhances antibacterial activity, it also has drawbacks such as reduced durability, discoloration, and high cost.

[0067] The antibacterial glass composition of the present invention contains 0.4 to 3 wt% of Ag2O. When 0.4 wt% of Ag2O is added, sufficient antibacterial activity is not exhibited due to insufficient dissolved Ag+ ions. When the Ag2O content exceeds 3 wt%, the vitrification range is exceeded, and there is a problem in that Ag is reduced to metal and precipitates non-homogeneously. Preferably, the antibacterial glass composition of the present invention contains 0.5 to 2.8 wt% of Ag2O.

[0068]

[0069] <ZnO 및 WO3>

[0070] The antibacterial glass composition of the present invention contains 12 to 25 wt% of at least one of ZnO and WO3 as an intermediate oxide.

[0071] An intermediate oxide refers to a component that is substituted with a part of a network-forming oxide and covalently bonded to it, so that it can play both the role of a network-forming oxide and a modifier oxide.

[0072]

[0073] ZnO is a component that plays the role of both a network former and a modifier oxide in terms of glass structure. In addition, in the present invention, ZnO is a key component that exhibits an antibacterial effect. The present invention excludes alkaline oxides. In the composition in which alkaline oxides are excluded, the structure of ZnO is determined by P2O5 / B2O3, and O-Zn-O covalent bonds and Zn 2+Ionic bonds are mixed. This structure creates a localized positive charge that is different from the normal negative charge of the bacteria. In addition to the ROS generated by this structure, the bacteria are subjected to oxidative stress. In the present invention, although ZnO is not the main component exhibiting antibacterial properties, it complements the antibacterial properties of silver and enhances antibacterial power in terms of antibacterial sustainability. Therefore, unlike conventional technologies that add a high content of silver to exhibit antibacterial sustainability and thus carry the risk of discoloration, the present invention can use an appropriate amount of silver.

[0074] Additionally, O-Zn-O covalent bonds and Zn 2+ In a state of mixed ionic bonding, nano-ZnO exhibits effects similar to those of a ceramic material exhibiting ionic properties. This state enhances anti-oxidation properties, and anti-oxidation properties remain unchanged even in the absence of local alkaline oxides.

[0075]

[0076] Next, WO3 is an intermediate oxide, but it has a high single bond strength with oxygen, making it a component close to a glass-forming oxide. In the present invention, the durability of the glass is improved through the POW bond. In addition, since the POW bond improves the hardness of the glass, it becomes needle-shaped when crushed, unlike the typical wave-shaped powder. When a needle-shaped antimicrobial agent is applied, dispersibility and floatability are improved. In addition, in terms of ionization tendency, W acts as an electrophilic substance and maintains Ag in the Ag+ state. Therefore, W prevents the reduction of silver within the glass or when dissolved from the glass. This means that it can exhibit anti-oxidation performance.

[0077]

[0078] In the present invention, if ZnO and WO3 are added in amounts less than 12 wt%, the durability of the antibacterial agent is reduced, resulting in reduced antibacterial persistence and reduced oxidation resistance. Conversely, if ZnO and WO3 are added in amounts exceeding 25 wt%, the melting point of the glass significantly increases, which may result in unmelted glass.

[0079] More preferably, the antimicrobial glass composition of the present invention may contain 12 to 22 wt% of the ZnO and 33 wt% or less of the WO.

[0080]

[0081] Phosphate glass, such as the antimicrobial glass composition of the present invention, is hygroscopic and easily dissolves in water. Commonly used phosphate glass antimicrobial agents utilize Al2O3 (or ZrO2) to improve durability. The glass structure is strengthened with PO-Al, reducing non-bridging oxygen and strengthening the glass. However, this raises the problem of the melting point increasing. In addition, a method of adding ZnO to prevent discoloration due to the reduction of Ag+ → Ag0 in silver-containing glass is also utilized. A small amount of ZnO added to phosphate glass does not affect the melting point, but a large amount added to prevent discoloration increases the melting point of the glass. In silver-containing phosphate glass, 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 discoloration. Accordingly, silver precipitation or reduction occurs during the vitrification process. Therefore, when Na2O, K2O, or CaO are used in phosphate glasses, problems such as silver discoloration and lack of durability arise.

[0082] The present invention provides a novel antibacterial glass composition capable of overcoming the chronic problems of silver discoloration and reduced durability in designing silver-containing phosphate-linked glass.

[0083] Due to the above-described component / structural characteristics, the antibacterial glass composition of the present invention prevents discoloration and has improved antibacterial durability compared to conventional silver-based glass.

[0084]

[0085] Method for producing antibacterial glass powder

[0086]

[0087] Hereinafter, a method for manufacturing an antibacterial glass powder according to an embodiment of the present invention will be described with reference to the attached drawings.

[0088] Figure 1 is a process flow diagram showing a method for manufacturing antibacterial glass powder according to an embodiment of the present invention.

[0089] As illustrated in FIG. 1, the method for manufacturing 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 crushing step (S140).

[0090]

[0091] mix

[0092] In the mixing step (S110), the antimicrobial glass composition described above is formed, and the characteristics of the antimicrobial glass composition are as described above.

[0093]

[0094] melting

[0095] In the melting step (S120), the antibacterial glass composition is melted.

[0096] In this step, melting is preferably performed at 1,100 to 1,400°C for 1 to 60 minutes. If the melting temperature is lower than 1,100°C or the melting time is lower than 1 minute, the antimicrobial glass composition may not be completely melted, which may cause incompatibility of the glass melt. 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.

[0097]

[0098] cooling

[0099] In the cooling step (S130), the molten antibacterial glass composition is cooled to room temperature.

[0100] At this stage, cooling is preferably performed in a furnace. If air or water cooling is used, the antibacterial glass may experience severe internal stress, which may lead to cracks in some cases. Therefore, furnace cooling is preferred.

[0101]

[0102] smash

[0103] In the crushing step (S140), the cooled antibacterial glass is crushed. At this time, any of the commonly known ball mills, jet mills, and planetary mills can be used for crushing.

[0104] By this crushing, the antibacterial glass is finely crushed to produce antibacterial glass powder. The antibacterial glass powder preferably has an average diameter of 30 μm or less, and a more preferred range is 2 to 12 μm.

[0105]

[0106] home appliances

[0107]

[0108] Meanwhile, a home appliance according to an embodiment of the present invention comprises a resin material and a plastic injection molded product to which antibacterial glass powder manufactured by the method described above has been added. 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, and the like.

[0109]

[0110] Here, the plastic injection molding comprises 95.0 to 99.0 wt% of resin material and 1.0 to 5.0 wt% of antibacterial glass powder.

[0111] If the amount of antibacterial glass powder added is less than 1.0 wt% of the total weight of the plastic injection molded product, the antibacterial activity against Pseudomonas aeruginosa may not be sufficient. Conversely, if the amount of antibacterial glass powder added is excessive, exceeding 5.0 wt% of the total weight of the plastic injection molded product, the mechanical properties may deteriorate.

[0112] The resin material includes at least one of PP (polypropylene), PC (polycarbonate), EPDM (ethylene propylene rubber), ABS (acrylonitrile-buradiene-styrene), and HIPS (high impact polystyrene).

[0113] At this time, the antibacterial glass powder has the same components as the antibacterial glass composition described above.

[0114]

[0115] Additionally, the plastic injection molded product may contain functional additives in addition to the antibacterial glass powder. The functional additives may include one or more selected from the group consisting of antioxidants, foaming agents, impact modifiers, nucleating agents, and coupling agents.

[0116] Accordingly, the home appliance according to the embodiment of the present invention is applied to the surface of a part that is vulnerable to bacterial growth and has a lot of contact with moisture, and has an antibacterial effect that can prevent the inhabitation and growth of various microorganisms.

[0117]

[0118] In addition, the antibacterial glass powder of the present invention can be used not only as an injection molded product but also as a coating material for glass shelves, or as an additive for paint or powder coating.

[0119]

[0120] Example

[0121] Hereinafter, the structure and operation of the present invention will be described in more detail through preferred embodiments of the present invention. However, these are presented as preferred examples of the present invention and should not be construed as limiting the present invention in any way.

[0122] Anything not described here will be omitted as it is technically feasible for those skilled in this field to infer.

[0123]

[0124] 1. Preparation of antibacterial glass powder samples

[0125]

[0126] Table 1 shows the composition and composition ratio of the antibacterial glass compositions of the examples and comparative examples.

[0127] The antimicrobial glass compositions having the compositions described in the above examples and comparative examples were each melted in an electric furnace at a temperature of 1,200°C, and then cooled in the form of bulk glass on a stainless steel plate by air cooling. Thereafter, the obtained glass was pulverized using an air pulverizer (jet mill), and an antimicrobial glass powder sample having a D50 particle size of 2 to 12 μm was prepared.

[0128] Here, the raw material for the component Ag2O is either AgNO3, Ag3PO4, or Ag2O, calculated based on the stoichiometry. The remaining components are either identical or mixed compounds as indicated in the table. The remaining components are the same as those listed in Tables 1 and 2. In addition, vitrification was classified based on the phenomenon of exhibiting a homogeneous glassy appearance and the occurrence of opalescence and unmelted matter.

[0129]

[0130] Classification Implementation Preliminary Comparative Example 123412345P2O552.662.652.632.672.665.959.449.839.4B2O312.210.43.926.48.36.7611.54.9CaO000009.1010MgO20.713.223.714.89.28.715.810.527.3WO30.7 0.72.11.4005.400ZnO12.112.112.321.98.97.912.825.827.3MoO30.90.52.81.70.50 .90.40.20.6Ag2O0.80.52.61.20.50.80.21.20.5Total100100100100100100100100100

[0131] (Unit: weight%)

[0132]

[0133] 2. Evaluation of antibacterial glass powder properties

[0134] Table 2 shows the results of property evaluation for samples manufactured according to examples and comparative examples.

[0135]

[0136] 1) Measurement of antibacterial power

[0137] For the examples and comparative examples in which vitrification was performed homogeneously, an antibacterial evaluation was performed on four bacteria (Staphylococcus aureus, Escherichia coil, Klebsiella pneumoniae, Pseudomonas aeruginosa) according to the shaking flask method (ASTM E2149-13a).

[0138]

[0139] 2) Antibacterial power measurement after durability evaluation

[0140] In order to evaluate the durability of the homogeneously vitrified examples and comparative examples, the antibacterial activity test was additionally conducted after exposure to moisture using the ASTM C1285-14 (glass and glass ceramic durability evaluation method) test method (50℃, 32 hours).

[0141]

[0142] Classification Preliminary Comparative Example 123412345 Vitrification (O, X) OOOOOOOXX Antibacterial activity Staphylococcus aureus 99.9% 99.9% 99.9% 99.9% 99.9% 99.9% 87.6% -- Escherichia coli 99.9% 99.9% 99.9% 99.9% 99.9% 99.9% 79.6% -- Klebsiella pneumoniae 99.9% 99.9% 99.9% 99.9% 99.9% 99.9% 60.4% -- Pseudomonas aeruginosa 99.9% 99.9% 99.9% 99.9% 99.9% 99.9% 98.8% -- (After durability evaluation) Antibacterial activity Staphylococcus aureus99.9%99.3%99.9%99.9%37.4%23.4%---Escherichia coil99.9%99.9%99.9%99.9%42.7%45.4%---Klebsiella pneumoniae99.9%99.9%99.9%99.9%45.8%65.3%---Pseudomonas aeruginosa99.9%99.9%99.9%99.9%92.4%82.8%---

[0143]

[0144] As shown in Table 2, the samples manufactured according to Examples 1 to 4 exhibited antibacterial activity of 99% or more against all four strains of bacteria. Furthermore, the samples manufactured according to Examples 1 to 4 all exhibited antibacterial activity of 99% or more when measured for antibacterial activity after exposure to moisture according to a durability evaluation method.

[0145] On the other hand, in the comparative examples, vitrification did not proceed homogeneously in Comparative Examples 4 and 5. In addition, none of the samples manufactured according to Comparative Examples 1 to 3 exhibited good antibacterial activity against all four strains.

[0146]

[0147] Although the present invention has been described with reference to the drawings exemplified above, it is to be understood that the present invention is not limited to the embodiments and drawings disclosed herein, and that various modifications may be made by those skilled in the art within the scope of the technical idea of ​​the present invention. Furthermore, even if the operational effects according to the configuration of the present invention have not been explicitly described while describing the embodiments of the present invention, it is natural that the effects predictable by the corresponding configuration should also be acknowledged.

Claims

1. 55 to 75 wt% of P2O5 and B2O3 combined; MgO 12 to 25 wt%; 12 to 25 wt% of at least one of ZnO and WO3; MoO30.4 ~ 3 wt%; and Contains 0.4 to 3 wt% of Ag2O; Does not contain K2O, Na2O and CaO Antibacterial glass composition.

2. In paragraph 1, Containing more than 20 wt% of the above P2O5 Antibacterial glass composition.

3. In paragraph 1, 12 to 22 wt% of the above ZnO; and Containing less than or equal to 33 wt% of the above WO Antibacterial glass composition. 4.(a) 55 to 75 wt% of P2O5 and B2O3 combined; MgO 12 to 25 wt%; 12 to 25 wt% of at least one of ZnO and WO3; MoO30.4 ~ 3 wt%; and Contains 0.4 to 3 wt% of Ag2O; A step of forming an antibacterial glass composition by mixing and stirring a composition not containing K2O, Na2O and CaO; (b) a step of melting the antibacterial glass composition; (c) a step of cooling the molten antibacterial glass composition; and (d) a step of crushing the cooled antibacterial glass; Method for manufacturing antibacterial glass powder.

5. In paragraph 4, In step (a) above, The above antibacterial glass composition Containing more than 20 wt% of the above P2O5 Method for manufacturing antibacterial glass powder.

6. In paragraph 4, In step (a) above, The above antibacterial glass composition 12 to 22 wt% of the above ZnO; and Containing less than or equal to 33 wt% of the above WO Method for manufacturing antibacterial glass powder.

7. In paragraph 4, In step (b) above, The above melting is Performed at 1,100 to 1,400℃ for 1 to 60 minutes Method for manufacturing antibacterial glass powder.

8. A home appliance including a plastic injection molded product with antibacterial glass powder added to the resin material, The above plastic injection molded product 95.0 to 99.0 wt% of the above resin material; and Contains 1.0 to 5.0 wt% of the above antibacterial glass powder; The above antibacterial glass powder 55 to 75 wt% of P2O5 and B2O3 combined; MgO 12 to 25 wt%; 12 to 25 wt% of at least one of ZnO and WO3; MoO30.4 ~ 3 wt%; and Contains 0.4 to 3 wt% of Ag2O; Does not contain K2O, Na2O and CaO Home appliances.

9. In paragraph 9, The above resin material Containing at least one of PP (polypropylene), PC (polycarbonate), EPDM (ethylene propylene rubber), ABS (acrylonitrile-buradiene-styrene), and HIPS (high impact polystyrene). Home appliances.

10. In paragraph 9, The above antibacterial glass powder Containing more than 20 wt% of the above P2O5 Home appliances.

11. In paragraph 9, The above antibacterial glass powder 12 to 22 wt% of the above ZnO; and Containing less than or equal to 33 wt% of the above WO Home appliances.

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