Antibacterial glass composition, method of manufacturing antibacterial glass powder therefor, and home appliance product including same

Abstract

The present invention relates to an antibacterial glass composition, a manufacturing method of an antibacterial glass powder thereof, and a home appliance product including the same, the antibacterial glass composition of the present invention including: P2O5 and B2O3 in total of 55 to 75 wt%; 12 to 25 wt% of MgO; one or more of ZnO and WO3 of 12 to 25 wt%; 0.4 to 3 wt% of MoO3; and 0.4 to 3 wt% of Ag2O; and the antibacterial glass composition not including K2O, Na2O, and CaO. Thus, the present invention can provide a phosphate-based antibacterial glass composition capable of exhibiting excellent durability and antibacterial performance even though a melting point reducing component causing side effects and a structure strengthening component are excluded.

Description

Technical Field

[0001] This invention relates to an antibacterial glass composition, a method for manufacturing the antibacterial glass powder thereof, and household appliances comprising the same. Background Technology

[0002] Microorganisms such as bacteria and fungi are ubiquitous in our living spaces, including appliances like water purifiers, refrigerators, ovens, and washing machines. If these microorganisms enter the human body, they can cause life-threatening infections. Therefore, there is a need for antimicrobial glass compositions capable of controlling the spread of microorganisms in household appliances such as water purifiers, refrigerators, ovens, and washing machines.

[0003] In such home appliances, bacteria and mold can multiply on parts exposed to moisture, such as those made of plastic injection molded components, causing problems with appearance or the environment in which they are used.

[0004] The bacteria that inhabit household appliances are very diverse, and the main strains may vary depending on the component. However, Pseudomonas aeruginosa is usually more likely to inhabit components exposed to moisture.

[0005] Therefore, antimicrobial agents should ensure their antimicrobial properties against this strain. Furthermore, antimicrobial agents should be made from materials with low toxicity to humans and the environment, and materials that ensure durability at high temperatures.

[0006] Antibacterial agents can be broadly classified into inorganic and organic systems. Organic antibacterial agents exert their antibacterial effect by dissolving the antibacterial material to the surface through water, thus exhibiting excellent antibacterial properties. However, their durability may decrease when used in washing machines. Furthermore, there are recent concerns that the dissolved materials from organic antibacterial agents may be harmful to human health and the environment. Additionally, due to their low decomposition temperature, there is a risk of decomposition during the injection molding process.

[0007] Although inorganic antimicrobial agents have very low solubility compared to organic antimicrobial agents and can ensure high-temperature durability, they may cause wetting problems at the interface with plastic injection molded products, and because Ag is mostly used as an antimicrobial material, it is expensive, which limits its application.

[0008] Antimicrobial glass compositions in which Ag is used as an antimicrobial component are known. Phosphate-based antimicrobial glass compositions in which phosphates are used as the main component are also known.

[0009] Ag-containing antimicrobial glass compositions are important for enhancing the durability of antimicrobial agents and preventing discoloration. However, if a large amount of commonly used Al2O3 is added to the antimicrobial glass composition to improve the durability of the antimicrobial agent, the antimicrobial activity of the agent may be reduced.

[0010] Conversely, if the antibacterial glass composition excludes Al2O3, then components that lower the melting point of the antibacterial glass composition must be used together, but this will cause Ag to discolor. Summary of the Invention

[0011] The problem that the invention aims to solve

[0012] The purpose of this invention is to provide a novel phosphate-based antibacterial glass composition that exhibits excellent durability and antibacterial properties even after excluding melting point-lowering and structural-strengthening components that cause side effects.

[0013] Furthermore, the object of the present invention is to provide a novel phosphate-based antibacterial glass composition capable of preventing discoloration caused by the reduction of Ag.

[0014] In addition, the present invention aims to provide a novel phosphate-based antibacterial glass composition in which durability is enhanced and antibacterial persistence is improved.

[0015] The objectives of this invention are not limited to those mentioned above. Other objectives and advantages of this invention not mentioned can be understood from the following description and can also be more clearly understood from the embodiments of this invention. Furthermore, it will be readily apparent that the objectives and advantages of this invention can be achieved through the means and combinations thereof given in the claims.

[0016] Technical solutions to the problem

[0017] The antibacterial glass composition of the present invention ensures excellent durability and antibacterial properties even when certain melting point lowering and structural strengthening components are excluded.

[0018] Therefore, the antibacterial glass composition of the present invention uses the concept of ionization tendency to combine MoO3 as a melting point lowering component and MgO, ZnO and / or WO3 as structural strengthening components, thus solving the problems of the prior art.

[0019] Specifically, the antibacterial glass composition of the present invention comprises: a total of 55-75% by weight of P2O5 and B2O3; 12-25% by weight of MgO; 12-25% by weight of one or more of ZnO and WO3; 0.4-3% by weight of MoO3; and 0.4-3% by weight of Ag2O, and the antibacterial glass composition does not include K2O, Na2O and CaO.

[0020] Furthermore, the method for manufacturing the antibacterial glass powder of the present invention includes the steps of forming the above-mentioned antibacterial glass composition, melting, cooling, and pulverizing.

[0021] Secondly, the household appliance products of the present invention include injection molded articles in which antibacterial glass powder is added to the resin material.

[0022] Invention Effects

[0023] According to the present invention, a phosphate-based antibacterial glass composition can be provided that exhibits excellent durability and antibacterial properties even when excluding melting point-lowering components and structural strengthening components that cause side effects.

[0024] Furthermore, according to the present invention, a phosphate-based antibacterial glass composition can be provided that, by eliminating melting point-lowering components and structural strengthening components that cause side effects, can prevent discoloration caused by Ag reduction, and can also exhibit excellent durability and antibacterial properties.

[0025] In addition, according to the present invention, a novel phosphate-based antibacterial glass composition is provided in which durability is enhanced and antibacterial persistence is improved.

[0026] In addition to the effects described above, the specific effects of the present invention will be described in conjunction with the following description of the specific matters for carrying out the invention. Attached Figure Description

[0027] Figure 1 This is a process flow diagram illustrating the manufacturing method of antibacterial glass powder according to an embodiment of the present invention. Detailed Implementation

[0028] The above-described objects, features, and advantages will now be described in detail with reference to the accompanying drawings. Therefore, those skilled in the art can readily implement the technical concept of this invention. In the description of this invention, detailed descriptions of specific techniques that are deemed likely to unnecessarily obscure the spirit of the invention will be omitted. Preferred embodiments of the invention will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings refer to the same or similar constituent elements.

[0029] Unless the context clearly indicates otherwise, the singular expressions used in this specification include the plural expressions. In this application, terms such as "consisting of" or "comprising" should not be construed as necessarily including all the constituent elements or steps described in the specification, but should be construed as excluding some of the constituent elements or steps, or including additional constituent elements or steps.

[0030] The following describes several embodiments of the antibacterial glass composition and the manufacturing method of the antibacterial glass powder thereof, as well as household appliances including the thereof.

[0031] Antibacterial glass composition

[0032] Even excluding melting point-lowering and structural-strengthening components that cause side effects, the antibacterial glass compositions of the present invention exhibit excellent durability and antibacterial properties.

[0033] The antibacterial glass composition of the present invention, as a phosphate-based glass composition, comprises: P2O5 and B2O3 in a total amount of 55 to 75% by weight; 12 to 25% by weight of MgO; one or more of 12 to 25% by weight of ZnO and WO3; 0.4 to 3% by weight of MoO3; and 0.4 to 3% by weight of Ag2O, and does not include K2O, Na2O, and CaO.

[0034] In addition, the antibacterial glass composition of the present invention may include 20% by weight or more of the P2O5, preferably may include 12 to 22% by weight of the ZnO and 5% by weight or less of the WO3.

[0035] Hereinafter, the functions and contents of the respective components of the antibacterial glass composition of the embodiments of the present invention will be described in detail.

[0036] <P2O5 and B2O3>

[0037] In the antibacterial glass composition, for selecting the matrix containing silver (Ag), electrochemical properties and the structure aspect of the glass are considered. Silver has a high reducing property in ionization tendency. Therefore, the vitrification of the silver-containing antibacterial glass composition is affected by the types of glass-forming oxides and modifying oxides.

[0038] Generally, the ionization tendency centered on alkali-alkaline earth components is well-known. Among them, silver is an element with a high reducing property and a low ionization tendency. However, in the present invention, what is important is the tendency in the electrophile region rather than the nucleophile region. If considering the region connected in the order of Ag-Pt-Au-Si-Ti-Ta-C-W-Mo-V-P, since silver and Si have similar ionization tendencies and fewer non-bridging oxygens, silicate-based glasses are not favorable for containing silver.

[0039] Therefore, in the P2O5-B2O3-based matrix, it is favorable for Ag to be stably vitrified into ions.

[0040] P2O5 and B2O3 are representative network-forming oxides capable of vitrifying the antibacterial glass composition. They are components that play a skeletal role in the structure of the glass. When the two components are used alone at 100% by weight, although they have excellent vitrification formation ability, such glass has hygroscopicity to moisture and thus has low durability.

[0041] In particular, if the two components are used together, the glass structure becomes dense, thereby enabling a slight improvement in the durability of the glass.

[0042] In the present invention, since P2O5 and B2O3 are both low-melting substances and network-forming oxides, when the total addition is less than 55% by weight, they will deviate from the vitrification range such as unmelted matter / incompatibility. In addition, when more than 75% by weight of P2O5 and B2O3 is added, the durability of the glass decreases, and it is easily soluble in water. Therefore, although the glass has sufficient antibacterial power initially, over time, the antibacterial substances and the matrix dissolve in water, and thus it cannot be used for a long time.

[0043] For this reason, the antibacterial glass composition of the present invention comprises 55 to 75% by weight of P2O5 and B2O3. Additionally, preferably, the antibacterial glass composition of the present invention may comprise 20% by weight or more of P2O5.

[0044] <MgO, MnO2, and Ag2O>

[0045] Secondly, the antibacterial glass composition of the present invention comprises MgO, MoO3, and Ag2O as modifying oxides.

[0046] A modifying oxide refers to an ionic bond component that cannot be vitrified alone and is located between the covalent bonds forming the glass as a component of the glass, thereby affecting the properties of the glass.

[0047] When selecting other components in the silver-containing glass composition system, the ionization tendency is an important factor. Among K-Ca-Na-Mg-Al-Zn-Fe-Ni-Sn-Pb-(H)-Cu-Hg-Ag-Pt, which is the nucleophile region, the ionization tendencies of K, Na, and Ca are high, so silver can be reduced in a state where it can dissolve inside or outside the glass. Therefore, in the present invention, the use of K2O, Na2O, and CaO is excluded.

[0048] First, although MgO is an alkaline earth metal, affected by the single bond strength with oxygen and the ionic size, unlike CaO, it strengthens the durability of the phosphate-based glass and raises the melting point. Thus, in ordinary phosphate-based glasses, MgO is used together with alkali metals or CaO. In the present invention, other solutions for reducing the melting point are used. In the present invention, since the use of Na2O, K2O, and CaO is excluded, the antibacterial glass composition of the present invention is strengthened by MgO in its glass structure. MgO exists as a modifying oxide in the glass and plays a role in increasing non-bridging oxygen. However, due to the strong binding strength of Mg-O, the size of Mg ＋ ions is smaller than that of Na ＋ 、K ＋ 、Ca ＋ when compared, so the dissolution characteristics with respect to water are less, and thus it has the characteristic of improved durability. In the core mechanism of dissolution into water, namely H3O ＋In the initial reaction of substitution of ions and ionic substances in glass, due to H3O ＋ With Ca ＋ Na ＋ K ＋ Ag ＋ The ions are similar in size, and therefore are prone to dissolution caused by substitution.

[0049] The antibacterial glass composition of the present invention comprises 12-25% by weight of MgO. When MgO is less than 12% by weight, the improvement in durability gained from Mg-O bonding strength is negligible, thus reducing the duration of antibacterial activity. If MgO exceeds 25% by weight, the melting point of the glass increases significantly, resulting in the formation of unmelted material.

[0050] Secondly, when MoO3 is added in large quantities to the glass composition, it functions as a network-forming oxide. However, in the case of using a small amount of MoO3 as in this invention, the MoO3 functions as a modifying oxide that cuts the bridging oxygen of the network-forming oxide and forms non-bridging oxygen. The properties of MoO3 in glass play a very important role in this invention. MoO3 has a high bond valence with oxygen in glass. Therefore, MoO3 cannot form bonds by sharing oxygen with the network-forming oxide. When the bond valence with oxygen is greater than 2, theoretically it means that the oxygen atom is in a strongly overbonded state. Therefore, MoO3 cuts the bridging oxygen of the network-forming oxide by sharing oxygen with the cations of the modifying oxide and aggregates like a cluster. In this invention, in Mg... + Ag + Zn² + The surrounding structures are coordinated in clusters. The regions where MoO3 forms clusters are enriched with non-bridging oxygen, thus these clusters readily dissolve in water. Furthermore, Mo exhibits higher reducing power than Ag in terms of ionization tendency. Therefore, in this invention, Mo plays a crucial role in vitrifying Ag in its ionic state, and Mo is adjacent to Ag... + The presence of MoO3 allows for its efficient performance. When the MoO3 content in the composition of this invention is less than 0.4% by weight, the melting point decreases and the reduction inhibition ability of silver decreases, resulting in uneven precipitation of Ag. When the MoO3 content in the composition of this invention exceeds 3.0% by weight, the glass loses its transparency and begins to appear black, thus limiting the applicability of the glass. In addition, when the MoO3 content in the composition of this invention exceeds 3.0% by weight, the water resistance of the glass decreases.

[0051] Secondly, Ag is a representative component with antibacterial properties. Ag exists in glass as Ag... ＋The state exists as a form modifying the oxide. If a large amount of Ag is added, it has the advantage of enhanced antibacterial power, but has the disadvantages of reduced durability of the antibacterial agent, discoloration, and high cost.

[0052] The antibacterial glass composition of the present invention includes 0.4 to 3% by weight of Ag2O. If 0.4% by weight of the Ag2O is added, the dissolved Ag ＋ ions are insufficient, and thus sufficient antibacterial power cannot be exhibited. If the Ag2O exceeds 3% by weight, it goes out of the vitrification range, and thus there is a problem that Ag is reduced to a metal and precipitates unevenly. Preferably, the antibacterial glass composition of the present invention includes 0.5 to 2.8% by weight of Ag2O.

[0053] <ZnO and WO3>

[0054] The antibacterial glass composition of the present invention includes one or more of ZnO and WO3 in an amount of 12 to 25% by weight as intermediate oxides.

[0055] An intermediate oxide refers to a component that can form a covalent bond by substituting a part of the network-forming oxide, and thus can play the role of the network-forming oxide and the role of the modifying oxide.

[0056] In terms of the glass structure, ZnO is a component that plays the role of a network-forming agent and a modifying oxide. In addition, in the present invention, ZnO is the core component showing the antibacterial effect. The present invention excludes alkali oxides. In such a composition excluding alkali oxides, the structure of ZnO is determined by P2O5 / B2O3, so that O-Zn-O covalent bonds and Zn 2＋ ionic bonds coexist. Such a structure creates a local positive charge different from the negative charge in the normal state of bacteria. Together with the reactive oxygen species (ROS) generated by such a structure, the bacteria are subjected to oxidative stress. In the present invention, although ZnO is not the main component showing antibacterial characteristics, it compensates for the antibacterial characteristics of Ag and compensates for the antibacterial power in terms of antibacterial persistence. Therefore, different from the prior art that adds a high content of Ag to exhibit antibacterial persistence and has a risk of discoloration, the present invention can use Ag in an appropriate amount.

[0057] And, in the state where O-Zn-O covalent bonds and Zn 2＋ ionic bonds coexist, although nano-ZnO is a ceramic material, it exhibits an effect similar to ionic characteristics. Such a state exhibits antioxidant performance, and even in the state where there is no alkali oxide locally, the antioxidant performance will not be reduced.

[0058] Secondly, although WO3 is an intermediate oxide, its single bond strength with oxygen is high, making it a component close to that of glass-forming oxides. In this invention, the durability of the glass is improved through the POW bond. Furthermore, because the POW bond increases the hardness of the glass, it forms needle-like shapes when pulverized, unlike typical wavy powders. If a needle-shaped antibacterial agent is applied, dispersibility and buoyancy are improved. Additionally, in terms of ionization tendency, W acts as an electrophilic substance, allowing Ag to retain its Ag content. ＋ Therefore, W prevents the reduction of silver even when it is inside or dissolved from the glass. This means it can exhibit antioxidant properties.

[0059] In this invention, when less than 12% by weight of ZnO and WO3 are added, the durability of the antibacterial agent decreases, thereby reducing the duration of antibacterial activity and reducing antioxidant properties. Conversely, when more than 25% by weight of ZnO and WO3 are added, the melting point of the glass increases significantly, potentially leading to the formation of unmelted material.

[0060] More preferably, the antibacterial glass composition of the present invention may include 12 to 22% by weight of the ZnO and less than 3% by weight of the WO3.

[0061] Phosphate-based glasses, such as the antibacterial glass composition of the present invention, are hygroscopic and therefore readily soluble in water. The main antibacterial agent used in phosphate-based glasses is Al₂O₃ (or ZrO₂) to improve durability. The glass structure is strengthened to PO-Al, thereby reducing non-bridging oxygen and further strengthening the glass. However, this results in an increase in the melting point. Additionally, to prevent Ag from forming in silver-containing glasses... ＋ →Ag 0 The discoloration caused by reduction can also be addressed by adding ZnO. Adding trace amounts of ZnO to phosphate-based glasses does not affect the melting point, but adding large amounts to prevent discoloration raises the melting point. In silver-containing phosphate-based glasses, alkali metals (Na₂O, K₂O) and alkaline earth metals (CaO) are typically used to lower the melting point. The presence of such alkali or alkaline earth metals promotes the reaction of Ag, which is the cause of silver discoloration. ＋ →Ag 0 The reaction occurs. Consequently, during vitrification, silver is either precipitated or reduced. Therefore, when Na₂O, K₂O, and CaO are used in phosphate-based glasses, problems such as silver discoloration and insufficient durability occur.

[0062] This invention provides a novel antibacterial glass composition that overcomes the persistent problems of silver discoloration and reduced durability in the design of silver-containing phosphate-based glasses.

[0063] Through the above-described composition / structural characteristics, the antibacterial glass composition of the present invention prevents discoloration and improves the duration of antibacterial activity compared with conventional silver-based glass.

[0064] Method for manufacturing antibacterial glass powder

[0065] Hereinafter, the method for manufacturing antibacterial glass powder according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0066] Figure 1 This is a process flow diagram illustrating the manufacturing method of antibacterial glass powder according to an embodiment of the present invention.

[0067] like Figure 1 As shown, 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 pulverizing step S140.

[0068] mix

[0069] The above-described antibacterial glass composition is formed in mixing step S110, and the antibacterial glass composition is characterized as described above.

[0070] Melting

[0071] In the melting step S120, the antibacterial glass composition is melted.

[0072] In this step, preferably, melting is carried out at 1,100–1,400°C for 1–60 minutes. If the melting temperature is below 1,100°C or the melting time is less than 1 minute, the antibacterial glass composition cannot be completely melted, thus causing incompatibility issues with the glass melt. Conversely, if the melting temperature exceeds 1,400°C or the melting time exceeds 60 minutes, it is not economical due to the excessive energy and time required.

[0073] cool down

[0074] In the cooling step S130, the molten antibacterial glass composition is cooled to room temperature.

[0075] In this step, cooling is preferably performed in a furnace. When using air cooling or water cooling, excessive internal stress builds up in the antibacterial glass, which may lead to cracking depending on the situation; therefore, furnace cooling is preferred.

[0076] Crushed

[0077] In the pulverization step S140, the cooled antibacterial glass is pulverized. At this time, any of the well-known ball mills, jet mills, and planetary mills can be used for pulverization.

[0078] Through this pulverization process, the antibacterial glass is pulverized into fine antibacterial glass powder. Preferably, such antibacterial glass powder has an average diameter of less than 30 μm, and more preferably, it can be an average diameter of 2 to 12 μm.

[0079] Home appliances

[0080] On the other hand, the household appliance products of this invention include resin materials and plastic injection molded articles in which antibacterial glass powder manufactured by the above method is added to the resin materials. The household appliances used in this invention may include, but are not limited to, water purifiers, washing machines, floor-standing air conditioners, system air conditioners, refrigerators, etc.

[0081] Here, the plastic injection molded product comprises 95.0 to 99.0% by weight of resin material and 1.0 to 5.0% by weight of antibacterial glass powder.

[0082] When the amount of antibacterial glass powder added is less than 1.0% by weight of the total weight of the plastic injection molded part, the antibacterial activity against Pseudomonas aeruginosa may be insufficient. Conversely, when the amount of antibacterial glass powder added exceeds 5.0% by weight of the total weight of the plastic injection molded part, excessive addition may reduce the mechanical properties.

[0083] The resin material includes at least one of polypropylene (PP), polycarbonate (PC), ethylene propylene rubber (EPDM), acrylonitrile-butadiene-styrene (ABS), and high impact polystyrene (HIPS).

[0084] At this point, the composition of the antibacterial glass powder is the same as that of the antibacterial glass composition described above.

[0085] In addition to antibacterial glass powder, functional additives may also be included in plastic injection molded products. These functional additives may include one or more selected from antioxidants, foaming agents, impact enhancers, nucleating agents, coupling agents, etc.

[0086] Therefore, the home appliance products of this invention, by being applied to the surface of components that are vulnerable to bacterial growth and come into frequent contact with moisture, possess antibacterial properties that prevent the inhabitation and growth of various microorganisms.

[0087] Furthermore, the antibacterial glass powder of the present invention can be used as a coating material for injection molded parts and glass partitions, or as an additive for paints or powder coatings.

[0088] Example

[0089] The following describes the structure and function of the present invention in further detail through preferred embodiments. However, this is presented as a preferred example of the invention and should not be construed as limiting the invention in any way.

[0090] Anything not described herein can be deduced by a person skilled in the art, therefore its description is omitted.

[0091] 1. Preparation of antibacterial glass powder samples

[0092] Table 1 is a table showing the composition and composition ratio of the antibacterial glass compositions of the examples and comparative examples.

[0093] 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 in air on a stainless steel plate to form glass blocks. The obtained glass was then pulverized using a jet mill to produce antibacterial glass powder samples with a D50 particle size of 2–12 μm.

[0094] The raw materials for component Ag2O were used after stoichiometric calculations of one of AgNO3, Ag3PO4, and Ag2O. The remaining components used compounds with the same or mixed compositions as shown in the table. The remaining components used were the same as those listed in Tables 1 and 2. Furthermore, vitrification was distinguished based on whether a uniform glassy structure was observed or whether milky whitening and unmelted material occurred.

[0095] [Table 1]

[0096] (Unit: weight %)

[0097] 2. Evaluation of the physical properties of antibacterial glass powder

[0098] Table 2 is a table showing the results of the physical property evaluation of the samples manufactured according to the examples and comparative examples.

[0099] 1) Antibacterial activity test

[0100] For the examples and comparative examples that underwent uniform vitrification, antimicrobial performance was evaluated against four bacteria (Staphylococcus aureus, Escherichia coli, Klebsiella pneumoniae, and Pseudomonas aeruginosa) according to the shaking flask method (ASTM E2149-13a).

[0101] 2) The antibacterial activity after durability evaluation is determined.

[0102] To evaluate the durability of the examples and comparative examples that were uniformly vitrified, the antimicrobial test (50°C, 32 hours) was additionally performed after exposure to moisture using the ASTM C1285-14 (Glass and Glass-Ceramic Durability Evaluation Method) test method.

[0103] [Table 2]

[0104] As shown in Table 2, the samples prepared according to Examples 1-4 all exhibited antibacterial activity of over 99% against all four bacteria. Furthermore, when the antibacterial activity of the samples prepared according to Examples 1-4 was measured after exposure to moisture using the durability evaluation method, all samples also exhibited antibacterial activity of over 99%.

[0105] In contrast, in the comparative examples, Comparative Examples 4 and 5 did not vitrify uniformly. Furthermore, none of the samples prepared according to Comparative Examples 1 to 3 exhibited excellent antibacterial activity against all four types of bacteria.

[0106] As shown above, the present invention has been described with reference to the accompanying drawings. However, the present invention is not limited to the embodiments and drawings disclosed in this specification. Various modifications can be made by those skilled in the art within the scope of the technical concept of the present invention, which is obvious. Furthermore, even if the effects of the configuration of the present invention are not explicitly described in the above description of the embodiments of the present invention, the predictable effects of the configuration should be acknowledged.

Claims

1. An antibacterial glass composition, wherein, include: A total of 55-75% by weight of P2O5 and B2O3; 12–25% by weight of MgO; 12-25% by weight of one or more of ZnO and WO3; 0.4–3% by weight of MoO3; and 0.4–3% by weight of Ag₂O; Furthermore, the antibacterial glass composition does not contain K2O, Na2O, or CaO.

2. The antibacterial glass composition according to claim 1, wherein, include: The P2O5 is 20% by weight or more.

3. The antibacterial glass composition according to claim 1, wherein, include: 12-22% by weight of the ZnO; as well as The WO3 contained in amounts less than 3% by weight.

4. A method for manufacturing antibacterial glass powder, wherein, include: (a) The step of mixing and stirring a composition comprising a total of 55-75% by weight of P2O5 and B2O3, 12-25% by weight of MgO, 12-25% by weight of one or more of ZnO and WO3, 0.4-3% by weight of MoO3 and 0.4-3% by weight of Ag2O, but excluding K2O, Na2O and CaO to form an antibacterial glass composition; (b) The step of melting the antibacterial glass composition; (c) the step of cooling the molten antibacterial glass composition; and (d) The step of crushing the cooled antibacterial glass.

5. The method for manufacturing antibacterial glass powder according to claim 4, wherein, In step (a), the antibacterial glass composition comprises more than 20% by weight of the P2O5.

6. The method for manufacturing antibacterial glass powder according to claim 4, wherein, In step (a), the antibacterial glass composition comprises: 12 to 22% by weight of the ZnO; and less than 3% by weight of the WO3.

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

8. A household appliance, said household appliance comprising a plastic injection-molded article in a resin material to which antibacterial glass powder has been added, wherein, The plastic injection molded article includes: 95.0 to 99.0% by weight of the resin material; and 1.0 to 5.0% by weight of the antibacterial glass powder; The antibacterial glass powder comprises: A total of 55-75% by weight of P2O5 and B2O3; 12–25% by weight of MgO; 12-25% by weight of one or more of ZnO and WO3; 0.4–3% by weight of MoO3; and 0.4–3% by weight of Ag₂O; Furthermore, the antibacterial glass powder does not contain K2O, Na2O, or CaO.

9. The household appliance product according to claim 9, wherein, The resin material includes one or more of polypropylene (PP), polycarbonate (PC), ethylene propylene rubber (EPDM), acrylonitrile-butadiene-styrene (ABS), and high-impact polystyrene (HIPS).

10. The household appliance product according to claim 9, wherein, The antibacterial glass powder comprises more than 20% by weight of the P2O5.

11. The household appliance product according to claim 9, wherein, The antibacterial glass powder comprises: 12-22% by weight of the ZnO; and less than 3% by weight of the WO3.

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