Method for producing antibacterial glass composition and antibacterial glass powder thereof, and home appliances containing the same

Abstract

This invention discloses an antibacterial glass composition and a method for producing the antibacterial glass powder thereof, as well as home appliances containing the same, which simultaneously ensure antibacterial activity and water resistance and prevent oxidation by alkali oxides by controlling the elution of Zn ions to embody antibacterial function using the content ratio of modified oxide and network-forming oxide so that network formation occurs. As a result, the antibacterial glass composition according to the present invention exhibits non-eluting properties and is an antibacterial agent that can prevent oxidation by alkali oxides. Therefore, when used as a coating agent for parts that come into contact with drinking water, it prevents contamination by bacteria, mold, etc., and exhibits excellent durability.

Description

Technical Field

[0001] The present invention relates to an antibacterial glass composition, a method for producing the antibacterial glass powder, and a household electrical appliance product containing the same.

Background Art

[0002] Microorganisms such as bacteria, fungi, and mold are ubiquitous in our living spaces, such as water purifiers, refrigerators, ovens, washing machines, etc. If these microorganisms enter the body, they can cause infections that threaten life. Therefore, there is a need for an antibacterial glass composition that can control the spread of microorganisms in household electrical appliance products such as water purifiers, refrigerators, ovens, washing machines, etc.

[0003] In these household electrical appliance products, bacteria and mold multiply in parts of plastic injection molded products that are exposed to moisture, causing problems in appearance or the usage environment.

[0004] A variety of bacteria inhabit household electrical appliance products, and the main strains may vary depending on the part. However, Pseudomonas aeruginosa usually has a high possibility of inhabiting parts that are exposed to moisture.

[0005] Therefore, the antibacterial agent should ensure antibacterial performance against these strains. Also, the antibacterial agent must be strictly selected from materials with low toxicity to the human body and the environment and materials with ensured durability against high temperatures.

[0006] Antibacterial agents are roughly classified into inorganic and organic types. Organic antibacterial agents elute a material having antibacterial performance to the surface side with water to exhibit antibacterial power against bacteria. Although they exhibit excellent antibacterial performance, when applied to a washing machine, the durability may decrease. Also, in recent years, problems regarding the harmfulness of the eluted material to the human body and the environment have been raised. Also, there is a risk of decomposition during the injection process at a low decomposition temperature.

[0007] Inorganic antimicrobial agents have significantly lower elution rates compared to organic antimicrobial agents and can ensure high-temperature durability. However, problems with interfacial wettability with plastic injection moldings can occur, and since silver (Ag) is almost always used as the antimicrobial material, the cost is high and its application is limited.

[0008] Conventional non-eluting antibacterial glass does not mean that the entire glass is non-eluting. Rather, it refers to glass composed of a water-insoluble glass matrix and ions or crystalline phase components that elute for antibacterial purposes.

[0009] As a result, in order to exhibit antibacterial activity, ions or crystalline phases that exhibit antibacterial properties must be eluted. However, conventional eluting antibacterial glass has difficulty exhibiting long-term durability, and its safety has been limited when applied to parts that come into contact with drinking water.

[0010] Furthermore, conventional antibacterial glass contains alkali oxides, and alkali ions eluted from these alkali oxides gain electrons. As a result, products to which conventional antibacterial glass is applied are damaged by oxidation reactions that cause electron loss. Plastic injection molding is susceptible to oxidation, and the aforementioned oxidation reactions can degrade its mechanical properties, and in extreme cases, can even lead to synthesis failure.

[0011] Furthermore, the aforementioned alkali ions capture OH groups and generate a weak haze. As a result, conventional antibacterial glass has a higher likelihood of crystallization, making it difficult to maintain transparency. [Overview of the project] [Problems that the invention aims to solve]

[0012] The object of the present invention is to provide an antibacterial glass composition that exhibits a permanent antibacterial effect even if the glass does not react with water at all, unlike existing dissolution mechanisms, a method for producing the antibacterial glass powder thereof, and home appliances containing the same.

[0013] Furthermore, an object of the present invention is to provide an antibacterial glass composition and antibacterial glass powder that exhibit antibacterial properties without being dissolved by water, by strictly controlling each component of the glass composition and their component ratios so that Zn ions, which are components that exhibit antibacterial properties, participate in the structure that forms a network, thereby forming a strong glass structure that is not dissolved by water, and thereby controlling the surface charge of the glass, as well as a method for producing the antibacterial glass powder and home appliances containing the same.

[0014] Furthermore, an object of the present invention is to provide an antibacterial glass composition and antibacterial glass powder that exhibits non-eluting properties by strictly controlling each component of the glass composition and their component ratios, and that can exhibit excellent effects in preventing contamination by bacteria, mold, etc. when used as a coating agent for parts that come into contact with drinking water, as well as a method for producing the antibacterial glass powder and home appliances containing the same.

[0015] Furthermore, an object of the present invention is to provide a novel antibacterial glass composition and a method for producing the antibacterial glass powder thereof, which can suppress unexpected oxidation reactions and provide transparent glass, as well as home appliances containing the same.

[0016] The objectives of the present invention are not limited to those mentioned above. Other objectives and advantages of the present invention not mentioned can be understood from the following description and more clearly from the embodiments of the present invention. Furthermore, it is readily apparent that the objectives and advantages of the present invention can be achieved by the means and combinations thereof described in the claims. [Means for solving the problem]

[0017] The antibacterial glass composition and method for producing the antibacterial glass powder according to the present invention, as well as home appliances containing the same, propose a novel composition ratio that eliminates alkali oxides, thereby simultaneously ensuring antibacterial activity, water resistance, and oxidation prevention.

[0018] Furthermore, the antibacterial glass composition and method for producing the antibacterial glass powder according to the present invention, as well as home appliances containing the same, cause the metal ions in the glass to take on a positive charge on the glass surface, i.e., the zeta potential, thereby attracting bacteria, which normally carry a negative charge, creating an electrically charged atmosphere in which bacteria cannot grow, and killing the bacteria.

[0019] As a result, the antibacterial glass composition according to the present invention is an antibacterial agent that exhibits non-eluting properties, and therefore, when used as a coating agent for parts that come into contact with drinking water, it exhibits excellent effectiveness in preventing contamination by bacteria, mold, and other microorganisms.

[0020] Furthermore, the antibacterial glass composition according to the present invention eliminates alkali oxides, preventing oxidation by alkali ions, while still maintaining excellent antibacterial properties and durability.

[0021] Therefore, the antibacterial glass composition according to the present invention contains 15-32% by weight of SiO2, 12-32% by weight of B2O3, 42-69% by weight of ZnO, 1-10% by weight of one or more of CaO, BaO, and SnO, and 1-11% by weight of one or more of Al2O3, ZrO2, CeO2, TiO2, and GeO2, and does not contain alkali oxides.

[0022] Furthermore, the antibacterial glass composition according to the present invention may further contain one or more of CuO, Fe2O3, MoO3, Co3O4, MnO2, and Bi2O3, preferably further containing 0.2 to 4% by weight of one or more of the above CuO, Fe2O3, MoO3, Co3O4, MnO2, and Bi2O3, and may also contain 1% by weight or more of the above CaO. [Effects of the Invention]

[0023] According to the present invention, by strictly controlling each component of the glass composition and its component ratio so that Zn ions, which are components that exhibit antibacterial performance, participate in the structure forming the network, a strong glass structure that does not dissolve in water is formed, thereby controlling the surface charge of the glass and enabling it to exhibit antibacterial properties without being eluted by water.

[0024] Also, according to the present invention, since it is a water-insoluble antibacterial agent composed of multi-purpose antibacterial components, it can be used permanently when utilized as a coating material for a glass shelf and an additive for plastic injection products.

[0025] Furthermore, according to the present invention, since it is an antibacterial agent exhibiting non-elution characteristics, when used as a coating agent for parts in contact with drinking water, it exhibits an excellent effect in preventing contamination by bacteria, mold, etc.

[0026] In particular, according to the present invention, it is possible to provide antibacterial glass powder having excellent durability by suppressing an unexpected oxidation reaction, and it is also possible to provide transparent glass.

[0027] The above-described effects and the specific effects of the present invention will be described while explaining the embodiments for carrying out the following invention.

Brief Description of the Drawings

[0028] [Figure 1] It is a process flow chart showing a method for manufacturing antibacterial glass powder according to an embodiment of the present invention.

Embodiments for Carrying out the Invention

[0029] The aforementioned objectives, features, and advantages will be described in detail below with reference to the attached drawings, so that a person with ordinary skill 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 it is determined that a specific description of known technology according to the present invention would 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 attached drawings. The same reference numerals in the drawings are used to indicate the same or similar components.

[0030] In this specification, singular expressions include plural expressions unless the context clearly indicates otherwise. Terms such as “composed of” or “including” in this application should not be interpreted as necessarily including all of the multiple components or stages described in the specification, but rather as some of the components or stages may not be included, or may include further components or stages.

[0031] The following describes several embodiments of the present invention, a method for producing antibacterial glass compositions and their antibacterial glass powder, and home appliances containing them.

[0032] Antibacterial glass composition Unlike existing elution mechanisms, the antibacterial glass compositions according to the embodiments of the present invention exhibit a permanent antibacterial effect even when the glass does not react with water at all.

[0033] Therefore, the antibacterial glass composition according to the embodiment of the present invention utilizes the fact that intermediate oxides can either act as modifying oxides or network-forming oxides during glass formation. By controlling each component and its ratio, the Zn ions, which are components that exhibit antibacterial properties, participate in the network-forming structure, thereby forming a strong glass structure that is not dissolved in water. This controls the surface charge of the glass, enabling it to exhibit antibacterial properties without being dissolved in water.

[0034] Thus, the antibacterial glass composition according to the embodiment of the present invention controls the elution of Zn ions to embody the antibacterial function by using the content ratio of modifying oxide and network-forming oxide to ensure network formation, thereby simultaneously securing antibacterial activity and water resistance.

[0035] Furthermore, the mechanism by which antibacterial properties are exhibited in this invention is that metal ions within the glass cause the surface charge of the glass, i.e., the zeta potential, to become positively charged. This attracts bacteria, which normally carry a negative charge, creating an electrically charged atmosphere in which bacteria cannot grow, and thus killing the bacteria.

[0036] In this context, the elements for producing a highly durable antibacterial glass composition can be broadly divided into two categories.

[0037] Firstly, it is a glass matrix that forms a glass structure and determines chemical durability. This plays a role similar to that of a support for existing inorganic antimicrobial agents (dispersing the material that exhibits antimicrobial properties on the surface).

[0038] The difference is that existing carriers have antibacterial components supported on the surface of an inorganic antibacterial agent, whereas in this invention, the metal material exhibiting antibacterial properties is present in ionic form within the glass substrate. Thus, in order to create a glass substrate with excellent durability, not only is the content ratio of glass-forming agents such as SiO2 and B2O3 important, but the combination ratio of alkaline components (mixed alkali effect in glass: the mechanical properties of the glass can change nonlinearly depending on the proportion of alkaline components) is also a very important factor.

[0039] Secondly, there is the effect of the metal components contained within the glass. In other words, the metal components are the main factors that enable the glass to exhibit antibacterial properties, but there are significant differences in their antibacterial characteristics depending on the component. Furthermore, due to the interaction with components within the glass substrate, durability can differ depending on whether ionic or covalent bonding is present, making it important to optimize the composition ratio of the antibacterial glass.

[0040] Furthermore, the present invention provides a novel antimicrobial maintenance composition that satisfies both the antimicrobial properties and water resistance mentioned above, while completely eliminating alkali oxides, in order to prevent the problem of product durability deterioration due to oxidation reactions generated by alkali ions eluted from alkali oxides.

[0041] Therefore, the antibacterial glass composition according to the examples of the present invention contains 15-32% by weight of SiO2, 12-32% by weight of B2O3, 42-69% by weight of ZnO, 1-10% by weight of one or more of CaO, BaO, and SnO, and 1-11% by weight of one or more of Al2O3, ZrO2, CeO2, TiO2, and GeO2, and does not contain alkali oxides.

[0042] The antibacterial glass composition according to the embodiments of the present invention described above is a water-insoluble antibacterial agent consisting of a multipurpose antibacterial component, and therefore, when used as a coating material for glass shelves and as an additive for plastic injection molded products, it can be used permanently.

[0043] Furthermore, since the antibacterial glass composition according to the embodiment of the present invention is an antibacterial agent exhibiting non-eluting properties, it exhibits excellent effectiveness in preventing contamination by bacteria, mold, and other microorganisms when used as a coating agent for parts that come into contact with drinking water.

[0044] In particular, the antibacterial glass composition according to the embodiment of the present invention can suppress unexpected oxidation reactions and provide an antibacterial glass powder with excellent durability.

[0045] The following will provide a detailed explanation of the roles and contents of each component of the antibacterial glass composition according to the embodiments of the present invention.

[0046] SiO2 and B2O3 are network-forming oxides that form the framework structure of glass and are core components that enable vitrification through covalent bonding.

[0047] SiO2 is a glass-forming agent that enables vitrification, and from a structural standpoint, it is a core component that plays a framework role in glass. If these SiO2 components are present in amounts exceeding the appropriate level, the viscosity increases during glass melting, reducing workability and yield during the cooling process. Furthermore, although SiO2 does not directly act on the components that exhibit antibacterial activity, compared to P2O5, a typical network-forming oxide, it contributes to the formation of OH on the glass surface. - This is advantageous for forming a small number of groups and causing the glass surface to become positively charged, which is triggered by metal ions within the glass.

[0048] Therefore, it is preferable that SiO2 be added in a content ratio of 15 to 32% by weight of the total weight of the antibacterial glass composition according to the present invention. If the amount of SiO2 added is less than 15% by weight, there will be insufficient network-forming oxides, which may cause milky whitening or heterogeneity with transparent glass to occur due to deviation from the vitrification region. Conversely, if the amount of SiO2 added exceeds 32% by weight, it will be difficult to control the surface charge of the glass to a positive value, which may result in a decrease in antibacterial activity.

[0049] B2O3 is a typical network-forming oxide and, along with SiO2, is a core component that enables sufficient vitrification. B2O3 has a low melting point and is used to lower the eutectic point of the molten material. In addition, when melting for vitrification, B2O3 helps to create a homogeneous glass by increasing the solubility of rigid components (such as TiO2). However, if B2O3 is added above a certain level, it can weaken the bonding structure of the glass, potentially leading to problems such as reduced water resistance.

[0050] Conventional antimicrobial glass compositions controlled the elution of metal ions that exhibit antimicrobial properties by adjusting the content of B2O3. In the present invention, as will be described later, alkali oxides have been removed from the composition in order to impart antioxidant properties, so B2O3 becomes the core component that supports ZnO in the glass and controls the structure. B2O3 exists in the glass with two coordination numbers, [BO3] / [BO4]. When ZnO is present with B2O3, O-Zn-O covalent bonding is possible depending on the coordination number of B2O3, and Zn 2+ Ionic bonds are also allowed to coexist. In this invention, antibacterial properties are realized through the localized charging of these Zn molecules.

[0051] Therefore, it is preferable that B2O3 be added in a content ratio of 12 to 32% by weight of the total weight of the antibacterial glass composition according to the present invention. If B2O3 is added in an amount less than 12% by weight, there will be insufficient flux, causing the glass to deviate from the vitrification region and potentially resulting in unmelted glass. Conversely, if the amount of B2O3 exceeds 32% by weight, structural problems with B within the network-forming structure may lead to a decrease in the durability and water resistance of the glass due to the inherent properties of the element.

[0052] ZnO is a component that covalently substitutes for some of the network-forming oxides, playing both the role of a network-forming oxide and a modifying oxide. Furthermore, ZnO is a component that contributes significantly to the expression of antibacterial effects.

[0053] These ZnO are intermediate oxides, and in order to participate in the formation of a network in glass, they must have a small atomic radius, high electronegativity, and a small difference in electronegativity with oxygen. These intermediate oxides have a larger atomic radius and lower electronegativity than the usual network-forming oxides Si, P, and B, so it is difficult for them to form glass on their own. However, in the presence of network-forming oxides, they substitute for them and play a role. Below a certain content, these ZnO only act as modifying oxides, but above a certain content, they form covalent bonds, dramatically improving durability. Here, the certain content is determined by the content of network-forming oxides and modifying oxides.

[0054] Therefore, it is preferable that ZnO be added in a content ratio of 42 to 69% by weight of the total weight of the antibacterial glass composition according to the present invention. If ZnO is added in an amount less than 42% by weight, there is a problem in that sufficient antibacterial power cannot be expressed because the absolute amount of the substance that exhibits antibacterial properties is insufficient. Conversely, if too much ZnO is added, exceeding 69% by weight, it cannot exist homogeneously in an ionic state within the glass, and may partially form crystals, causing it to deviate from the vitrification region, resulting in milky whitening and heterogeneity where transparent glass is mixed in.

[0055] In this invention, CaO, BaO, and SnO are used to lower the melting point of the antibacterial glass. By adding specific amounts of the above components to the antibacterial glass composition, the viscosity of the antibacterial glass is reduced. Since the antibacterial glass composition of this invention contains a high content of ZnO and does not contain alkali oxides, it is important to add trace amounts of the above components to lower the melting point.

[0056] The antibacterial glass composition of the present invention contains 1 to 10% by weight of one or more of CaO, BaO, and SnO.

[0057] If the content of the above components is less than 1% by weight, the melting point reduction function will not be sufficiently exhibited, resulting in the problem of unmelted material being generated. Furthermore, if the content of the above components exceeds 10% by weight, mismismatch may occur, resulting in phase separation into zincborate and alkaline earth silicate.

[0058] Preferably, in order to obtain a better melting point reduction effect, the present invention may contain 1% by weight or more of CaO within the above content range.

[0059] Typical antimicrobial glass compositions contain alkali oxides. Representative alkali oxides include Na2O and K2O. Alkali oxides essentially play the role of modifying oxides that form non-crosslinked bonds within the glass. Alkali oxides alone cannot vitrify, but when mixed in a certain ratio with network-forming agents such as SiO2 and B2O3, vitrification becomes possible. Furthermore, when alkali oxides are included in glass as a single component, the durability of the glass is continuously weakened within the range where vitrification is possible. However, when alkali oxides are included in glass as two or more components, the durability of the glass can be further improved depending on the ratio. This is called the mixed alkali effect.

[0060] However, the present invention is characterized by the exclusion of alkali oxides. Although alkali oxides have the advantage of lowering the melting point from the perspective of glass melting, the present invention excludes alkali oxides in order to prevent problems caused by the elution of alkali ions. In the corrosion / elution process of glass, the size of alkali ions is similar to that of H3O+ present in water, and substitution is likely to occur. In particular, because alkali ions are weakly bound in the glass, they are preferentially eluted. The eluted ions have the following two problems. Firstly, because the alkali ions eluted in antibacterial glass gain electrons, products to which antibacterial glass is applied as an additive lose electrons. As a result, the product is damaged by an oxidation reaction that causes electron loss. For example, in the case of plastic injection molding, oxidation is fatal, so the mechanical properties of the manufactured product may decrease, or in extreme cases, the synthesis may fail. Secondly, trace amounts of eluted alkali ions capture OH on the surface and create a weak haze. As a result, the eluted alkali ions reduce the transparency of the glass and, in some cases, may also increase the crystallization possibility of the glass.

[0061] This invention proposes a novel composition analyzer that does not exclude alkali oxides while simultaneously satisfying all physical properties such as antibacterial properties and durability.

[0062] Furthermore, the antibacterial glass composition of the present invention contains 1 to 11% by weight of one or more of Al2O3, ZrO2, CeO2, TiO2, and GeO2. These components enhance the durability of the antibacterial glass and also have the function of assisting in the vitrification of the antibacterial glass. If the above components are used in amounts less than 1% by weight, the durability of the antibacterial glass will not be sufficiently enhanced and it will not be able to be used for a long period of time. Also, if these components are used in amounts exceeding 11% by weight, the alkaline earth components, which are substances that melt at high temperatures, will not melt sufficiently, causing the glass to deviate from the vitrification region and resulting in the formation of unmelted material.

[0063] Next, in order to achieve a highly transparent color, the antibacterial glass composition of the present invention may further contain one or more of CuO, Fe2O3, MoO3, Co3O4, MnO2, and Bi2O3, preferably containing one or more of CuO, Fe2O3, MoO3, Co3O4, MnO2, and Bi2O3 in a range of 0.4 to 4% by weight. If the content deviates from the above range, the color may not be achieved, or the durability and antibacterial performance of the antibacterial glass may be reduced.

[0064] Conventional antibacterial glass exhibits antibacterial properties through the elution of antibacterial ions, and its antibacterial properties are achieved through the design of the framework structure and the selection of antibacterial active substances. This means that although the amount of ions eluted varies depending on the robustness of the framework structure, it is ultimately a consumable process.

[0065] The antibacterial glass composition of the present invention is water-insoluble and does not exhibit antibacterial properties through ion elution. The components released when exposed to water are in ppb units and are not directly correlated with antibacterial activity. The fact that it exhibits antibacterial properties on its own, without exhibiting antibacterial properties through ion elution, indicates that ions exist within the solid glass depending on the proportion of the components, and electron transfer phenomena occur, leading to the formation of surface charge (ZetaPotential) and reactive oxygen species (ROS).

[0066] Injected materials and window glass have a surface charge of -100mV. Regardless of whether the bacterial strain is Gram-negative or Gram-positive, the surface of the cell membrane exhibits a negative charge. The antibacterial glass composition of the present invention has a surface charge of -10 to +10mV, which, due to the charge difference, causes bacteria to adsorb to the surface of the antibacterial glass. The adsorbed bacterial strains enter a state of charge disruption due to the relatively positive charge of the antibacterial glass, which results in a weakening effect on the cell membrane under severe stress.

[0067] The bacterial strain produces small amounts of ROS during its basal metabolic processes. However, when ROS generated by antimicrobial glass is added, the ROS concentration increases rapidly due to external factors, leading to oxidative stress. This, in turn, damages cell membranes, DNA, and proteins.

[0068] As a result, the antibacterial glass composition of the present invention exhibits antibacterial properties in a non-consumable manner because ions are eluted and do not directly act on bacterial strains, but rather exert their antibacterial effect through charge and oxidative stress. This allows the composition to exhibit sufficient antibacterial activity even if it contains little to no content of components that typically exhibit strong antibacterial properties, such as Ag, Mn, Ga, Te, La, and Cu.

[0069] Furthermore, as described above, the antibacterial glass composition of the present invention does not contain alkali oxides and exhibits excellent antioxidant performance in the products to which it is applied.

[0070] Method for manufacturing antibacterial glass powder The method for producing antibacterial glass powder according to the embodiment of the present invention will be described below with reference to the attached drawings.

[0071] Figure 1 is a step-by-step diagram showing a method for producing antibacterial glass powder according to an embodiment of the present invention.

[0072] As shown in Figure 1, the method for producing antibacterial glass powder according to the embodiment of the present invention includes a mixing step (S110), a melting step (S120), a cooling step (S130), and a grinding step (S140).

[0073] mixture In the mixing stage (S110), a composition containing 15-32% by weight of SiO2, 12-32% by weight of B2O3, 42-69% by weight of ZnO, 1-10% by weight of one or more of CaO, BaO, and SnO, and 1-11% by weight of one or more of Al2O3, ZrO2, CeO2, TiO2, and GeO2, and free of alkali oxides, is mixed and stirred to form an antibacterial glass composition.

[0074] The characteristics of the antibacterial glass composition are as described above.

[0075] melting In the melting stage (S120), the antibacterial glass composition is melted.

[0076] 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 below 1,100°C or the melting time is less than 1 minute, the antibacterial glass composition cannot be completely melted, resulting in the problem of mismatch in the molten glass. Conversely, if the melting temperature exceeds 1,400°C or the melting time exceeds 60 minutes, it is not economical because it requires excessive energy and time.

[0077] cooling In the cooling stage (S130), the molten antibacterial glass composition is cooled to room temperature.

[0078] At this stage, cooling is preferably carried out by furnace cooling. If air cooling or water cooling is applied, excessive internal stress may form in the antibacterial glass, which may cause cracks in some cases; therefore, furnace cooling is preferred.

[0079] Crushing In the grinding stage (S140), the cooled antimicrobial glass is ground. At this time, one of the commonly known ball mills, jet mills, or planetary mills can be used for grinding.

[0080] Through this grinding process, the antibacterial glass is finely ground to produce antibacterial glass powder. These antibacterial glass powders preferably have an average diameter of 30 μm or less, and more preferably, an average diameter of 2 to 12 μm.

[0081] On the other hand, the home appliance according to the embodiment of the present invention includes a resin material and a plastic injection molded product to which antibacterial glass powder manufactured by the method described above has been added to the resin material. The home appliance used in the present invention may include, but is not limited to, water purifiers, washing machines, floor-standing air conditioners, ceiling-mounted air conditioners, refrigerators, etc.

[0082] Here, the plastic injection molding contains 95.0 to 99.0% by weight of resin material and 1.0 to 5.0% by weight of antibacterial glass powder.

[0083] If the amount of antibacterial glass powder added is less than 1.0% by weight of the total weight of the plastic injection molding, the antibacterial activity against Pseudomonas aeruginosa may be insufficient. Conversely, if the amount of antibacterial glass powder added exceeds 5.0% by weight of the total weight of the plastic injection molding, the mechanical properties may deteriorate.

[0084] The resin material includes at least one of the following: PP (polypropylene), PC (polycarbonate), EPDM (ethylene propylene rubber), ABS (acrylonitrile-buradiene-styrene), and HIPS (high impact polystyrene).

[0085] In this case, the components of the antibacterial glass powder are the same as those of the antibacterial glass composition described above.

[0086] Furthermore, the plastic injection molding may contain functional additives in addition to antibacterial glass powder. In this case, the functional additives may include one or more selected from antioxidants, foaming agents, impact reinforcers, nucleating agents, coupling agents, etc.

[0087] As a result, the home appliance according to the embodiment of the present invention will have antibacterial properties that can be applied to the surface of parts that are susceptible to bacterial growth and frequently come into contact with moisture, thereby preventing the survival and growth of various microorganisms.

[0088] Furthermore, the antibacterial glass powder of the present invention can be used not only in injection-molded products, but also as a coating material for glass shelves, and as an additive for paints and powder coatings.

[0089] Examples The configuration and operation of the present invention will be described in more detail below by 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 sense.

[0090] Any information not included here can be technically inferred by experts in this field, and therefore its explanation will be omitted.

[0091] 1. Manufacturing of antimicrobial glass powder samples Table 1 shows the examples, their compositions in relation to the antibacterial glass composition, and their composition ratios.

[0092] The above examples and the antibacterial glass compositions having the composition described in the examples were melted in an electric furnace at a temperature of 1,200°C, and then cooled to a stainless steel plate in the form of glass bulk by air cooling. Subsequently, the obtained glass was crushed in a ball mill to produce antibacterial glass powder samples with a D50 particle size of 2 to 12 μm.

[0093] Here, the raw materials for components CaO and BaO were CaCO3 and BaCO3, respectively, calculated stoichiometrically, and the other components were the same as those listed in Tables 1 and 2. Furthermore, vitrification was classified based on whether the glass exhibited homogeneous glass properties or whether it resulted in milky whitening and the formation of unmelted material.

[0094] [Table 1]

[0095] 2. Evaluation of the physical properties of antibacterial glass powder Table 2 shows the results of physical property evaluation for the examples and the samples produced according to the examples.

[0096] 1) Measurement of antibacterial activity In the examples where vitrification was performed homogeneously, antimicrobial evaluation was conducted for four bacteria (Staphylococcus aureus, Escherichia coil, Klebsiella pneumyu-moniae, and Pseudomonas aeruginosa) based on the shaking flask method (ASTM E2149-13a).

[0097] 2) Measurement of antibacterial activity after durability evaluation To evaluate the uniformity of vitrification in the examples and their durability, the samples were exposed to moisture according to the ASTM C1285-14 (Durability Evaluation Method for Glass and Glass Ceramics) test method, followed by the antimicrobial activity test (50°C, 32 hours).

[0098] [Table 2]

[0099] As shown in Table 2, all four samples prepared according to Examples 1-5 showed antibacterial activity of 99% or more. Furthermore, even after exposure to moisture using the durability evaluation method, all samples prepared according to Examples 1-5 still showed antibacterial activity of 99% or more.

[0100] On the other hand, in the examples, the vitrification was not carried out uniformly in Examples 3 and 4.

[0101] Furthermore, none of the samples prepared according to Examples 1 and 2 exhibited good antibacterial activity in any of the four bacteria.

[0102] As described above, the present invention has been explained with reference to the illustrative drawings, but it is clear that the present invention is not limited to the embodiments and drawings disclosed herein, and that various modifications can be made by an ordinary person 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 embodiments described above, it is natural that the effects that can be predicted by such configuration should also be recognized.

Claims

1. SiO ２ 15-32% by weight, B ２ O ３ 12-32% by weight, ZnO at 42-69% by weight, One or more of CaO, BaO, and SnO in an amount of 1 to 10% by weight, Al ２ O ３ , ZrO ２ , CeO ２ , TiO ２ , and GeO ２ contains 1 to 11% by weight of one or more of them, Alkali oxide-free, Antimicrobial glass composition.

2. CuO, Fe ２ O ３ MoO ３ Co ３ O ４ MnO ２ , Bi ２ O ３ This includes one or more of the following: The antibacterial glass composition according to claim 1.

3. CuO, Fe ２ O ３ MoO ３ Co ３ O ４ MnO ２ , Bi ２ O ３ It further contains 0.2 to 4% by weight of one or more of the following: The antibacterial glass composition according to claim 2.

4. The above CaO contains 1% by weight or more, The antibacterial glass composition according to claim 1.

5. (a) SiO ２ 15-32% by weight, B ２ O ３ 12-32% by weight, ZnO at 42-69% by weight, One or more of CaO, BaO, and SnO in an amount of 1 to 10% by weight, Al ２ O ３ , ZrO ２ , CEO ２ , TiO ２ , and GeO ２ A step of mixing and stirring a composition containing 1 to 11% by weight of one or more of the following, and not containing alkali oxides, to form an antibacterial glass composition. (b) The step of melting the antibacterial glass composition, (c) A step of cooling the molten antibacterial glass composition, (d) Step of crushing the cooled antibacterial glass, including, A method for producing antibacterial glass powder.

6. In the above stage (a), The aforementioned antibacterial glass composition is CuO, Fe ２ O ３ MoO ３ Co ３ O ４ MnO ２ , Bi ２ O ３ This includes one or more of the following: A method for producing antibacterial glass powder according to claim 5.

7. In step (a) above, The aforementioned antibacterial glass composition is CuO, Fe ２ O ３ MoO ３ Co ３ O ４ MnO ２ , Bi ２ O ３ It further contains 0.2 to 4% by weight of one or more of the following: A method for producing antibacterial glass powder according to claim 6.

8. The above CaO contains 1% by weight or more, A method for producing antibacterial glass powder according to claim 5.

9. In step (b) above, The aforementioned melting, Perform the procedure at 1,100 to 1,400°C for 1 to 60 minutes. A method for producing antibacterial glass powder according to claim 5.

10. A home appliance containing a plastic injection molded from a resin material to which antibacterial glass powder has been added, The aforementioned plastic injection molding is The aforementioned resin material is present in an amount of 95.0 to 99.0% by weight, and The aforementioned antibacterial glass powder is contained in an amount of 1.0 to 5.0% by weight. The aforementioned antibacterial glass powder is SiO ２ 15-32% by weight, B ２ O ３ 12-32% by weight, ZnO at 42-69% by weight, One or more of CaO, BaO, and SnO in an amount of 1 to 10% by weight, Al ２ O ３ , ZrO ２ , CEO ２ , TiO ２ , and GeO ２ It contains one or more of the following in an amount of 1 to 11% by weight, and does not contain alkali oxides. Home appliances.

11. The aforementioned resin material is It includes at least one of the following: PP (polypropylene), PC (polycarbonate), EPDM (ethylene polymer rubber), ABS (acrylonitrite-buradine-styrenene), and HIPS (high impact polystyrene). The home appliance according to claim 10.

12. The aforementioned antibacterial glass powder is CuO, Fe ２ O ３ MoO ３ Co ３ O ４ MnO ２ , Bi ２ O ３ This includes one or more of the following: The home appliance according to claim 10.

13. The aforementioned antibacterial glass powder is CuO, Fe ２ O ３ MoO ３ Co ３ O ４ MnO ２ , Bi ２ O ３ It further contains 0.2 to 4% by weight of one or more of the following: The home appliance according to claim 10.

14. The aforementioned antibacterial glass powder is The above CaO contains 1% by weight or more, The home appliance according to claim 10.

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