Resin composition for antibacterial filters, method for producing the same, and antibacterial filter using the same

Abstract

The present invention relates to a resin composition for an antibacterial filter for suppressing bacterial growth in a filter applied to a home appliance such as an air conditioner, a humidifier, or an air purifier, thereby improving air hygiene problems. Specifically, the resin composition for an antibacterial filter of the present invention includes an antibacterial glass composition and a filter resin, and in particular, the components and contents of the antibacterial glass composition are controlled to improve not only the antibacterial activity but also the physical properties of the resin.

Description

Technical Field

[0001] The present invention relates to a resin composition for an antibacterial filter, a method for producing the same, and an antibacterial filter using the resin composition.

Background Art

[0002] Microorganisms such as bacteria, fungi, and bacteria are unevenly distributed in our living spaces such as washbasins, refrigerator interior shelves, washing machines, air conditioners, humidifiers, and air purifiers. If microorganisms enter the human body, they can cause infections that threaten life.

[0003] In particular, household electrical appliances such as air conditioners, humidifiers, and air purifiers can spread microorganisms harmful to the human body in a sealed space.

[0004] In recent years, technologies for applying antibacterial agents to filters used in air conditioners and humidifiers have been attempted.

[0005] The filter is made of a raw yarn using a resin component. The process of manufacturing the raw yarn of the filter involves melting and spinning the resin and then passing through a stretching process. As a result, long and thin raw yarns are produced. At this time, only when the draw ratio of the raw yarn is ensured, no problems occur in the stretching process. However, the antibacterial agent causes a chemical reaction with the resin and damages the polymer chain. As a result, the antibacterial agent causes a problem of reducing the draw ratio of the resin. When the draw ratio of the raw yarn decreases, the raw yarn frequently breaks during the process of manufacturing the raw yarn. As a result, the production yield of the raw yarn decreases. Therefore, in order to improve the filter using the antibacterial agent, processes such as improving the process or changing the components and content of the antibacterial agent are necessary.

[0006] Among antibacterial agents, silver (Ag) is widely used. According to the elution safety standards of the reference standards and the notice designating inspection agencies, it is defined that the elution amount of silver must be 10 ppb (0.01 mg / L) or less. However, the conventional technology has a problem in that a large amount of silver elution may cause harm to the human body and ecological harm. [Overview of the Initiative] [Problems that the invention aims to solve]

[0007] The object of the present invention is to provide an antimicrobial resin composition for filters that suppresses the growth of bacteria in filters applied to home appliances such as air conditioners, humidifiers, or air purifiers, thereby improving air hygiene issues.

[0008] Furthermore, the object of the present invention is to provide a method for producing an antibacterial filter resin composition that is harmless to the human body and exhibits antibacterial properties simply by adding an antibacterial glass composition, without changing existing filter manufacturing processes.

[0009] Furthermore, an object of the present invention is to provide a novel antimicrobial filter that can be applied to home appliances such as air conditioners, humidifiers, or air purifiers in order to suppress the growth of bacteria and improve air hygiene problems.

[0010] 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]

[0011] The antibacterial filter resin composition according to the present invention comprises an antibacterial glass composition and a filter resin. In particular, the components and content of the antibacterial glass composition are controlled to improve not only the antibacterial activity but also the physical properties of the resin.

[0012] More specifically, the antibacterial filter resin composition according to the present invention comprises an antibacterial glass composition containing an antibacterial glass powder based on 100% by weight of antibacterial glass powder, comprising 26 to 50% by weight of SiO2, 0.5 to 4% by weight of one or more of B2O3 and P2O5, 15 to 27% by weight of Na2O and K2O combined, 3 to 20% by weight of one or more of CaO, MgO and WO3, and 22 to 44% by weight of one or more of ZnO and SnO, as well as an antibacterial glass composition containing a silane coupling agent having a cationic active group, and a filter resin containing a polymer material.

[0013] The composition according to the present invention does not exert its antibacterial activity while the antibacterial agent is decomposed, but rather has a mechanism in which antibacterial metal ions cause the surface charge of the glass to become positively charged, attracting negatively charged bacteria and preventing them from growing. As a result, the present invention can ensure semi-permanent antibacterial activity.

[0014] As a result, when the antibacterial glass composition of the present invention is used as an additive in plastic injection molding, it not only has excellent antibacterial activity against Intestinal Bacillus and Staphylococcus aureus, but it may also be possible to effectively eliminate Pseudomonas aeruginosa, which is a major problem as a bacterium that thrives in moist environments where water is present.

[0015] Furthermore, the antibacterial filter resin composition of the present invention, in particular, controls the components and content of the antibacterial agent to prevent a decrease in the elongation rate of the yarn using the resin and suppress a decrease in the manufacturing yield.

[0016] Furthermore, the manufacturing method of the present invention includes the step of manufacturing an antibacterial glass composition and mixing the antibacterial glass composition with a filter resin. As described above, the manufacturing method of the present invention makes it possible to manufacture an antibacterial filter resin composition with excellent physical properties and antibacterial properties using a simple process.

[0017] Furthermore, the antibacterial filter of the present invention includes a yarn made from an antibacterial filter resin composition, and the yarn is woven into a mesh. [Effects of the Invention]

[0018] The resin composition for an antibacterial filter according to the present invention can suppress the growth of bacteria in a filter applied to household electrical appliances such as an air conditioner, a humidifier, or an air cleaner, and can improve air hygiene problems.

[0019] In particular, the resin composition for an antibacterial filter of the present invention can control the components and content of an antibacterial agent, prevent a decrease in the draw ratio of a raw yarn using a resin, and suppress a decrease in the production yield.

[0020] In addition, in the antibacterial glass composition applied to the present invention, SiO2, which is a glass-forming agent, is added as a main component, and metal ions having antibacterial properties added to the glass make the surface charge (zeta potential) of the glass carry a positive charge. As a result, bacteria that usually carry a negative charge can be attracted, creating a charge atmosphere in which bacteria cannot grow, and the bacteria can be killed.

[0021] As a result, the antibacterial filter of the present invention not only has excellent antibacterial power against Escherichia coli and Staphylococcus aureus, but can also effectively remove Pseudomonas aeruginosa, which is a main problem-causing bacterium in a humid environment where water exists.

[0022] Moreover, the antibacterial filter according to the present invention has high thermal stability and anti-persistence, and complements the slow antibacterial immediate effectiveness, which is a disadvantage of inorganic antibacterial agents.

[0023] The above-described effects and the specific effects of the present invention will be described and described while explaining the embodiments for carrying out the following invention.

Brief Description of the Drawings

[0024] [Figure 1] It is a diagram schematically showing a part of an antibacterial filter according to an embodiment of the present invention. [Figure 2] It is a SEM photograph showing an antibacterial filter according to an embodiment of the present invention. [Figure 3]SEM photograph showing the antibacterial filter according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above-described objects, features, and advantages will be described in detail below with reference to the accompanying drawings, whereby those having ordinary knowledge in the technical field to which the present invention pertains can easily implement the technical idea of the present invention. In the description of the present invention, when it is determined that a specific description of a known technique related to the present invention obscures the gist of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings are used to indicate the same or similar components.

[0026] As used herein, the singular expressions include plural expressions unless the context clearly indicates otherwise. Terms such as "composed of" or "including" in the present application should not be construed as necessarily including all of the plurality of components or steps described in the specification, and some of the components or steps may not be included, or may further include additional components or steps.

[0027] Hereinafter, an antibacterial filter resin composition according to some embodiments of the present invention, a method for producing the same, and an antibacterial filter using the resin composition will be described.

[0028] <Resin Composition for Antibacterial Filter> The antibacterial glass composition applied to the resin composition for the antibacterial filter of the present invention ensures semi-permanent persistence against antibacterial power by having insolubility by adjusting each component and its component ratio.

[0029] In addition, the antibacterial glass composition is composed of components harmless to the human body, has high heat resistance and high water resistance, and can maintain the antibacterial function semi-permanently.

[0030] Furthermore, the antibacterial glass composition does not exert its antibacterial effect as the antibacterial agent decomposes. Rather, the antibacterial metal ions cause the glass surface to become positively charged, attracting negatively charged bacteria and preventing their growth. This mechanism ensures semi-permanent antibacterial activity.

[0031] As a result, when the antibacterial glass composition is used as an additive in an antibacterial filter, it not only has excellent antibacterial activity against Intestinal bacteria and Staphylococcus aureus, but it may also be possible to effectively remove Pseudomonas aeruginosa, which is a major problem as a bacterium that grows in moist environments where water is present.

[0032] Furthermore, the aforementioned antibacterial glass composition, having a form in which the inorganic antibacterial glass and the antibacterial organic substance are bonded, possesses high thermal stability and long-lasting antibacterial properties, while also compensating for the slow, immediate antibacterial effect that is a drawback of inorganic antibacterial agents.

[0033] Furthermore, the antibacterial filter resin composition of the present invention controls the components and content of the antibacterial agent in the antibacterial glass composition to prevent a decrease in the elongation rate of the yarn using the resin and suppress a decrease in the manufacturing yield.

[0034] Therefore, the antibacterial filter resin composition according to the embodiment of the present invention comprises an antibacterial glass composition and a filter resin, the antibacterial glass composition comprising antibacterial glass powder containing 26 to 50% by weight of SiO2, 0.5 to 4% by weight of one or more of B2O3 and P2O5, 15 to 27% by weight of Na2O and K2O combined, 3 to 20% by weight of one or more of CaO, MgO and WO3, and 22 to 44% by weight of one or more of ZnO and SnO, based on 100% by weight of antibacterial glass powder, and a silane coupling agent having a cationic active group.

[0035] First, the antibacterial glass composition included in the antibacterial filter resin composition of the present invention will be described.

[0036] Here, for the aforementioned antibacterial glass composition to become glass, it must contain a glass-forming agent. Furthermore, in order for glass to materialize easily under conditions for glass melting (approximately 900-1600°C), it must contain a modified oxide to melt the glass-forming agent into a homogeneous and amorphous form.

[0037] The most commonly used glass-forming agents commercially are SiO2, B2O3, and P2O5. In the case of glass composed of large amounts of B2O3 and P2O5, the hygroscopic properties become strong, and many OH groups derived from moisture in the air are adsorbed onto the surface, resulting in a negative surface charge. This then acts as a factor that inhibits the antibacterial properties of the glass.

[0038] Therefore, the present invention provides a novel silicate-based antibacterial glass composition that intentionally contains less B2O3 and P2O5 and has SiO2 as the main component, which is a glass-forming agent.

[0039] The antibacterial glass powder contained in the antibacterial glass composition of the present invention contains 26 to 50% by weight of SiO2 and 0.5 to 4% by weight of one or more of B2O3 and P2O5.

[0040] SiO2 is a glass-forming agent that enables vitrification and is a core component that acts as the structural framework of the glass. Although SiO2 does not directly act on the components that exhibit antibacterial activity, it is advantageous compared to P2O5, a typical glass-forming agent, in that it forms fewer OH groups on the glass surface, thereby causing the glass surface to become positively charged due to metal ions within the glass.

[0041] These SiO2s can be added in a content ratio of 26 to 50% by weight based on 100% by weight of the antibacterial glass powder according to the present invention. If a large amount of SiO2 is added, exceeding 50% by weight, there is a problem that the viscosity increases during glass melting, leading to a decrease in workability and yield during the cooling process. Conversely, if SiO2 is added at a concentration of less than 26% by weight, there is a problem that the structure of the glass weakens, resulting in a decrease in water resistance.

[0042] On the other hand, in the case of glass composed of large amounts of B2O3 and P2O5, the hygroscopic properties become strong, and many OH groups derived from moisture in the air are adsorbed onto the surface, causing the surface charge to become negatively charged. This then acts as a factor that inhibits the antibacterial properties of the glass. Therefore, the present invention has developed a novel antibacterial glass composition in which the addition of B2O3 and P2O5 is minimized and SiO2, which is a glass-forming agent, is the main component.

[0043] In other words, while SiO2 plays a role in strengthening the structure of glass, when used as a single component as a glass-forming agent, its viscosity becomes too high during melting, requiring a very high melting temperature to produce homogeneous glass. Therefore, by adding small amounts of B2O3 and P2O5 within a range that does not weaken the water resistance of the glass, the viscosity of the molten material can be reduced, improving the workability and yield of glass manufacturing.

[0044] As a result, the antibacterial glass powder of the present invention contains 0.5 to 4% by weight of one or more of B2O3 and P2O5.

[0045] If one or more of B2O3 and P2O5 are added in amounts exceeding 4% by weight, the water resistance of the glass may decrease, and leaching may occur more easily in water. Conversely, if one or more of B2O3 and P2O5 are added in amounts less than 0.5% by weight, the workability and yield of the glass may decrease.

[0046] Alkali oxides such as Na2O and K2O are oxides that act as non-crosslinking network modifiers within the glass composition. While these components alone cannot vitrify, they become viable when mixed in certain proportions with glass-forming agents such as SiO2 and B2O3. If only one of these components is included in the glass composition, the durability of the glass can be weakened within the viable region. However, if two of these components are included in the glass composition, the durability of the glass can be further improved depending on the ratio. This is called the mixed alkali effect.

[0047] Therefore, Na2O and K2O are added in a combined content ratio of 15 to 27% by weight based on 100% by weight of the antibacterial glass powder according to the present invention. If the combined amount of Na2O and K2O exceeds 27% by weight, the thermophysical properties of the glass composition may decrease. Conversely, if the combined amount of Na2O and K2O is less than 15% by weight, it becomes difficult to control the valence of components such as ZnO, and the antibacterial properties may decrease.

[0048] Furthermore, preferably, the content of Na2O and the content of K2O can satisfy the following relationship.

[0049] [Relationship] 0.5 ≤ (Na2O content) / (K2O content) ≤ 1.5

[0050] If the Na2O content and K2O content do not satisfy the above relationship, the effect of lowering the melting point due to the eutectic point will decrease, which may make it difficult to vitrify the antibacterial glass composition.

[0051] Next, the antibacterial glass powder of the present invention contains 3 to 20% by weight of one or more of CaO, MgO, and WO3.

[0052] One or more of CaO, MgO, and WO3, like alkali oxides, act as non-crosslinking network modifiers within the glass composition. Adding one or more of CaO, MgO, and WO3 in amounts exceeding 20% ​​by weight can degrade the thermophysical properties of the glass composition. Conversely, adding one or more of CaO, MgO, and WO3 in amounts less than 3% by weight can weaken the glass structure, reducing durability and potentially decreasing antibacterial properties.

[0053] Next, the antibacterial glass powder of the present invention contains one or more of ZnO and SnO as components that exhibit antibacterial properties.

[0054] One or more of ZnO and SnO are present in an amount of 22 to 44% by weight, based on 100% by weight of the antibacterial glass powder according to the present invention. If one or more of ZnO and SnO are added in an amount of less than 22% by weight, the antibacterial properties of the glass composition are difficult to exhibit. Conversely, if one or more of ZnO and SnO are added in an amount exceeding 44% by weight, the durability and thermal properties of the glass composition may decrease. Preferably, the ZnO can be added in an amount of 30% by weight or more.

[0055] In particular, the present invention prevents a decrease in the elongation rate of the yarn and a decrease in the yarn production yield by having the antibacterial glass powder contain 22 to 44% by weight of one or more of ZnO and SnO compared to other components. One or more of ZnO and SnO exhibit antibacterial properties, but they also chemically react with the filter resin, reducing the elongation rate of the yarn. Therefore, it is necessary to control the type and content of antibacterial components in the antibacterial filter resin composition. The present invention prevents a decrease in the elongation rate of the yarn by controlling the content of other components and one or more of ZnO and SnO.

[0056] Furthermore, conventional antibacterial compositions contain various antibacterial components such as Ag and Ag oxides to exhibit antibacterial activity (coverage against various bacteria). However, when injection-molded products to which Ag components are applied are exposed to light for a long period of time, color changes occur. The present invention can suppress the above-mentioned side effects by exhibiting antibacterial activity using Zn and Sn without containing Ag or Ag oxides. The antibacterial glass composition of the present invention preferably contains as little Ag and Ag oxides as possible, but if necessary, it may also contain Ag3PO4 or AgNO3 at a concentration of 0.1% by weight or less based on 100% by weight of antibacterial glass powder.

[0057] Next, the antibacterial glass composition includes, together with the antibacterial glass powder described above, a silane coupling agent having a cationic active group.

[0058] Here, the cationic active group may include one or more selected from quaternary ammonium salts, imidazolium groups, piperidinium groups, morpholinium groups, pyridinium groups, and pyrrolidinium groups.

[0059] The silane coupling agent may contain one or more of the following: γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-mercaptopropyltrimethoxysilane, γ-mercaptopropyltriethoxysilane, and a silane binder represented by the following chemical formula.

[0060] RO(CH2CHO) n CH2CH2CH2CSi(OR')3 [In the above formula, R is a methyl group, an ethyl group, or a hydrogen atom. R' is either a methyl group or an ethyl group. n is a constant between 1 and 10.

[0061] Thus, the present invention includes an antimicrobial glass powder, which is an inorganic antimicrobial agent, and also includes a silane coupling agent having a cationic activating group in order to maximize the performance of the antimicrobial glass powder. More specifically, the silane coupling agent having a cationic activating group binds to the surface of the antimicrobial glass powder. The cationic activating group interacts with the cell membrane of bacteria, which has a negative charge, to exert antimicrobial properties. Furthermore, when the antimicrobial glass composition of the present invention is applied to a polymer, it has advantages in improving the mechanical properties and dispersibility of the polymer. The silane coupling agent is used as an intermediate that connects the antimicrobial inorganic substance (glass powder) and the organic substance (cationic activating group).

[0062] The silane coupling agent having the cationic active group is preferably included in an amount of 0.1 to 20 parts by weight, and most preferably in an amount of 0.1 to 5 parts by weight, based on 100 parts by weight of antimicrobial glass powder.

[0063] Here, the resin composition for the antibacterial filter of the present invention may contain 1 to 20% by weight of the above-mentioned antibacterial glass composition, based on 100% by weight of the total. If the amount of the antibacterial glass composition is less than 1% by weight, the required antibacterial properties may not be exhibited. On the other hand, if the amount of the antibacterial glass composition exceeds 20% by weight, it may actually reduce the durability and stretchability of the filter.

[0064] Next, the filter resin included in the antibacterial filter resin composition of the present invention will be described.

[0065] The resin for the filter is not particularly limited as long as it is a polymer material used as a material for antibacterial filters. Preferably, the resin for the filter may contain one or more of the following: polypropylene, polycarbonate, HIPS (high-impact polystyrene), ABS (acrylonitrile-butadiene-styrene) copolymer, and EPDM (ethylene-propylene-diene monomer) copolymer.

[0066] <Method for producing resin composition for antibacterial filters> Next, we will describe a method for producing an antibacterial filter resin composition according to an example of the present invention.

[0067] A method for producing an antibacterial filter resin composition according to an embodiment of the present invention first includes a step for producing an antibacterial glass composition, the step for producing the antibacterial glass composition includes a mixing step, a melting step, a cooling step, and a grinding step.

[0068] mixture In the mixing stage, first, antibacterial glass powder is produced, which includes antibacterial glass powder containing 26-50% by weight of SiO2, 0.5-4% by weight of one or more of B2O3 and P2O5, 15-27% by weight of Na2O and K2O combined, 3-20% by weight of one or more of CaO, MgO and WO3, and 22-44% by weight of one or more of ZnO and SnO, based on 100% by weight of antibacterial glass powder.

[0069] The preferred composition ratio of the antibacterial glass powder is as described above.

[0070] melting In the melting stage, the antibacterial glass powder is melted.

[0071] 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 1,200°C or the melting time is less than 1 minute, the antibacterial glass powder cannot be completely dissolved, resulting in mismatch in the molten glass. Conversely, if the melting temperature exceeds 1,300°C or the melting time exceeds 60 minutes, it is not economical because it requires excessive energy and time.

[0072] cooling During the cooling phase, the molten antibacterial glass powder is cooled to room temperature.

[0073] 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.

[0074] Crushing In the grinding stage, the cooled antibacterial glass is ground. It is preferable to use a dry grinder for this process. Examples of dry grinders include ball mills and z-mills. During these grinding processes, a silane coupling agent having a cationic active group is added to the antibacterial glass powder.

[0075] Through the pulverization described above, the antibacterial glass is finely pulverized to produce an antibacterial glass composition containing antibacterial glass powder and a silane coupling agent having a cationic active group. These antibacterial glass compositions preferably have an average diameter of 30 μm or less, and more preferably, an average diameter of 15 to 25 μm can be obtained.

[0076] The antibacterial glass composition according to the embodiment of the present invention can be produced through the above process.

[0077] Next, the antibacterial glass composition and the filter resin can be mixed to produce the antibacterial filter resin composition of the present invention.

[0078] The preferred content of the antibacterial glass composition and preferred examples of the filter resin are as described above.

[0079] <Antibacterial filter> Next, the antibacterial filter of the present invention will be described. Referring to Figure 1, the antibacterial filter 10 of the present invention is a filter in which a yarn (F) made using the antibacterial filter resin composition obtained by the manufacturing method described above is woven into a mesh (MESH) shape.

[0080] The filament (F) contained in the antibacterial filter 10 of the present invention may have a diameter of 100 to 150 μm, and antibacterial glass (AG) having an average particle size of 3 to 5 μm may be dispersed in the filament (F). Here, the average particle size refers to the average value relative to the particle size of at least 10 or more antibacterial glass particles (AG).

[0081] 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 way.

[0082] Any information not included here can be technically inferred by experts in this field, and therefore its explanation will be omitted.

[0083] 1. Manufacturing of resin compositions for antibacterial filters An antibacterial glass composition having the composition described in Table 1 was melted in an electric furnace at a temperature of 1,250°C, and then cullet with a thickness of 1 mm or less was obtained using a quenching twin roll.

[0084] Here, the raw materials for Na2O, K2O, and CaO were Na2CO3, K2CO3, and CaCO3, respectively, while the other components were the same as those listed in Table 1. Vitrification was classified based on whether the material exhibited homogeneous glassy properties or whether it became milky white or produced unmelted material.

[0085] The manufactured glass was crushed using a dry mill (ball mill or jet mill) to produce a powder with an average particle size of 3-6 μm.

[0086] Next, a silane coupling agent having a cationic active group was prepared.

[0087] For the synthesis with cationic active groups, 3-Chloropropyltrimethoxysilane was used as the silane coupling agent. To synthesize imidazolium with the silane coupling agent, the synthesis was carried out at 130°C for 24 hours in a toluene atmosphere at a molar ratio of 1:1.2, and the following substances were produced.

[0088] [ka]

[0089] Next, to synthesize quaternary ammonium salts and silane coupling agents, 3-Chloropropyltrimethoxysilane and dimethylbutylamine were synthesized in a molar ratio of 1:0.909 at a 90°C atmosphere for 24 hours to produce the following substances.

[0090] [ka]

[0091] Subsequently, the antibacterial glass powder manufactured as described above was used to synthesize a silane coupling agent having a cationic active group.

[0092] The antibacterial glass powder and a silane coupling agent having a cationic active group were mixed for a long period of time while being crushed, and then heat-treated at 120°C for 24 hours to physically and chemically bond the antibacterial glass powder and the silane coupling agent having a cationic active group.

[0093] After preparing a filter resin containing polypropylene as the main resin, a filter resin composition was produced by mixing 10% by weight of the antibacterial glass composition with 90% by weight of the filter resin.

[0094] Table 2 shows whether or not vitrification occurred in the examples and comparative examples, and the content of the silane coupling agent. Ta.

[0095] [Table 1]

[0096] [Table 2]

[0097] Furthermore, a commercially available ZnO-based antibacterial agent was mixed with a filter resin to produce the composition according to Comparative Example 2. Similarly, Comparative Example 2 also contained 1.5% by weight of the antibacterial agent.

[0098] 2. Manufacturing of antibacterial filters The antibacterial filter resin composition manufactured as described above was extruded and injected to form pellets, and these pellets were fed into a filter spinning machine to be spun and drawn to produce yarn.

[0099] The produced yarn was woven into a 30-40 mesh pattern by crossing the yarn perpendicularly to each other using a weaving machine. Then, the woven mesh was insert-injected and combined with a frame to produce a filter.

[0100] 3. Evaluation of antibacterial filters (1) Structure of the antibacterial filter Referring to Figures 2 and 3, SEM images of the filter manufactured in Example 1 of the present invention are shown. It can be confirmed that antibacterial glass is finely arranged in the filament of the filter according to the embodiment of the present invention.

[0101] (2) Physical property evaluation A tensile test was performed on the filter according to Example 1. When a force of 3.5 kgf was applied using a push-pull gauge, the filter according to Example 1 did not experience any mesh tearing.

[0102] (3) Antimicrobial test evaluation Next, the antibacterial activity values ​​against Staphylococcus aureus and Escherichia coli were confirmed for each filter based on antibacterial standard tests (ISO 20743, textile antibacterial testing method).

[0103] [Table 3]

[0104] As shown in Table 3, the filters produced by the examples were found to have superior antibacterial activity compared to the samples used in the comparative examples.

[0105] (4) Antimicrobial activity life test The antibacterial filter was exposed to laundry containing a neutral detergent for 17 hours (@40°C), and then its antibacterial activity was evaluated.

[0106] When comparing the antibacterial activity of the filter according to Example 1 and the filter according to Comparative Example 2, the initial antibacterial performance of both filters was at a similar level. However, after immersion in water, the filter according to Example 1 showed superior antibacterial activity. This demonstrates that the antibacterial filter to which the antibacterial glass of the present invention is applied exhibits superior durability, even in environments where filters have deteriorated.

[0107] [Table 4]

[0108] (5) Spinning test of filter yarn, lifespan test of antibacterial activity Spinning tests were conducted on the free-filter yarns of Example 1 and Comparative Example 2. The number of holes in the spinning machine nozzle was 120. In Example 1, no problems such as nozzle clogging occurred.

[0109] However, the ZnO-based antimicrobial agent caused a resin hardening phenomenon through a chemical reaction with the filter resin, which prevented the spinning of the existing quantity of yarn. These problems not only reduced the manufacturing yield but also decreased the production volume.

[0110] 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 configurations should also be recognized.

[0111] [Invention described in the claims at the time of international filing] [Claim 1] Based on 100% by weight of antibacterial glass powder, SiO2 at 26-50% by weight; One or more of B2O3 and P2O5 in an amount of 0.5 to 4% by weight; The combined weight of Na2O and K2O is 15-27%; One or more of CaO, MgO, and WO3 in an amount of 3-20% by weight; and Antimicrobial glass powder containing 22-44% by weight of one or more of ZnO and SnO; Antimicrobial glass compositions containing a silane coupling agent having a cationic active group; and A resin composition for antibacterial filters comprising a resin for filters containing a polymer material. [Claim 2] The antibacterial filter resin composition according to claim 1, wherein the content of Na2O and the content of K2O satisfy the following relationship. 0.5 ≤ (Na2O content) / (K2O content) ≤ 1.5 [Relationship] [Claim 3] The antibacterial glass powder contains 0.1% by weight or less of Ag or an oxide containing Ag, as described in claim 1, for the antibacterial filter resin composition. [Claim 4] The antibacterial glass powder contains 30% by weight or more of the ZnO in the resin composition for antibacterial filters according to claim 1. [Claim 5] The cationic active group is one or more selected from quaternary ammonium salts, imidazolium groups, piperidinium groups, morpholinium groups, pyridinium groups, and pyrrolidinium groups. The resin composition for antimicrobial filters according to claim 1, wherein the silane coupling agent comprises one or more selected from γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-mercaptopropyltrimethoxysilane, γ-mercaptopropyltriethoxysilane, and a silane binder represented by the following chemical formula. RO(CH2CHO) n CH2CH2CH2CSi(OR')3 [In the above formula, R is a methyl group, an ethyl group, or a hydrogen atom. R' is either a methyl group or an ethyl group. n is a constant between 1 and 10. [Claim 6] The antibacterial filter resin composition according to claim 1, comprising 0.1 to 20 parts by weight of the silane coupling agent having a cationic active group, based on 100 parts by weight of the antibacterial glass powder. [Claim 7] The antimicrobial filter resin composition according to claim 1, wherein the resin for the filter comprises one or more of the following: polypropylene, polycarbonate, HIPS (high-impact polystyrene), ABS (acrylonitrile-butadiene-styrene) copolymer, and EPDM (Ethylene-propylene-diene monomer) copolymer. [Claim 8] The aforementioned resin composition for antibacterial filters is The antibacterial filter resin composition according to claim 1, comprising 1 to 20% by weight based on 100% by weight of the antibacterial glass composition. [Claim 9] A method for producing a resin composition for antibacterial filters, The stage in manufacturing antimicrobial glass powder; A step of melting the antibacterial glass powder; A step of cooling the molten antibacterial glass powder; The steps of adding a silane coupling agent having a cationic active group to the cooled antibacterial glass powder and grinding it to produce an antibacterial glass composition; and The process includes the step of mixing the antibacterial glass composition with a filter resin; The aforementioned antibacterial glass powder is based on 100% by weight of antibacterial glass powder, SiO2 at 26-50% by weight; One or more of B2O3 and P2O5 in an amount of 0.5 to 4% by weight; The combined weight of Na2O and K2O is 15-27%; One or more of CaO, MgO, and WO3 in an amount of 3-20% by weight; and A method for producing an antimicrobial filter resin composition containing 22 to 44% by weight of one or more of ZnO and SnO. [Claim 10] A method for producing an antibacterial filter resin composition according to claim 9, wherein the content of Na2O and the content of K2O contained in the antibacterial glass powder satisfy the following relationship. 0.5 ≤ (Na2O content) / (K2O content) ≤ 1.5 [Relationship] [Claim 11] The method for producing the antibacterial filter resin composition according to claim 9, wherein the antibacterial glass powder contains 0.1% by weight or less of Ag or an oxide containing Ag. [Claim 12] The method for producing the antibacterial filter resin composition according to claim 9, wherein the antibacterial glass powder contains 30% by weight or more of the ZnO. [Claim 13] The cationic active group is one or more selected from quaternary ammonium salts, imidazolium groups, piperidinium groups, morpholinium groups, pyridinium groups, and pyrrolidinium groups. A method for producing an antimicrobial filter resin composition according to claim 9, wherein the silane coupling agent comprises one or more selected from γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-mercaptopropyltrimethoxysilane, γ-mercaptopropyltriethoxysilane, and a silane binder represented by the following chemical formula. RO(CH2CHO) n CH2CH2CH2CSi(OR')3 [In the above formula, R is a methyl group, an ethyl group, or a hydrogen atom. R' is either a methyl group or an ethyl group. n is a constant between 1 and 10. [Claim 14] A method for producing an antibacterial filter resin composition according to claim 9, comprising 0.1 to 20 parts by weight of the silane coupling agent having a cationic active group, based on 100 parts by weight of the antibacterial glass powder. [Claim 15] A method for producing an antimicrobial filter resin composition according to claim 9, wherein the filter resin comprises one or more of the following: polypropylene, polycarbonate, HIPS (high-impact polystyrene), ABS (acrylonitrile-butadiene-styrene) copolymer, and EPDM (Ethylene-propylene-diene monomer) copolymer. [Claim 16] The aforementioned resin composition for antibacterial filters is A method for producing an antibacterial filter resin composition according to claim 9, comprising 1 to 20% by weight based on 100% by weight of the antibacterial glass composition. [Claim 17] It is an antibacterial filter, The invention comprises a yarn made using an antibacterial filter resin composition manufactured by the manufacturing method described in claim 9, An antibacterial filter in which the aforementioned yarn is woven into a mesh. [Claim 18] The diameter of the aforementioned filament is 100 to 150 μm. The antibacterial filter according to claim 17, wherein antibacterial glass having an average particle size of 3 to 5 μm is dispersed in the yarn.

Claims

1. A resin composition for antibacterial filters, Antimicrobial glass composition; and A filter resin containing a polymer material; The aforementioned antibacterial glass composition is Antibacterial glass powder and It comprises a silane coupling agent having a cationic active group, The aforementioned antibacterial glass powder is based on 100% by weight of antibacterial glass powder, SiO ２ 26-50% by weight; B ２ O ３ and P ２ O ５ One or more of these in an amount of 0.5 to 4% by weight; Na ２ O and K ２ The sum of O is 15-27% by weight; CaO, MgO and WO ３ One or more of the following in 3 to 20% by weight; and It contains 22 to 44% by weight of one or more of ZnO and SnO; The silane coupling agent having a cationic active group includes a substance synthesized from 3-chloropropyltrimethoxysilane and dimethylbutylamine. The antibacterial filter resin composition comprises 1 to 20% by weight of the antibacterial glass composition, based on 100% by weight of the entire antibacterial filter resin composition.

2. The content of the Na ２ O and the content of the K ２ O satisfy the following relational expression. The resin composition for an antibacterial filter according to claim 1. 0.5 ≤ (Na ２ (Content of O) / (K ２ O content) ≤ 1.5 [Relational expression]

3. The antibacterial glass powder contains 0.1% by weight or less of Ag or an oxide containing Ag, as described in claim 1, for the antibacterial filter resin composition.

4. The antibacterial glass powder contains 30% by weight or more of the ZnO, the antibacterial filter resin composition according to claim 1.

5. The antibacterial filter resin composition according to claim 1, comprising 0.1 to 20 parts by weight of the silane coupling agent having a cationic active group, based on 100 parts by weight of the antibacterial glass powder.

6. The antimicrobial filter resin composition according to claim 1, wherein the resin for the filter comprises one or more of the following: polypropylene, polycarbonate, HIPS (high-impact polystyrene), ABS (acrylonitrile-butadiene-styrene) copolymer, and EPDM (ethylene-propylene-diene monomer) copolymer.

7. A method for producing a resin composition for antibacterial filters, The stage in manufacturing antimicrobial glass powder; The step of melting the antibacterial glass powder; A step of cooling the molten antibacterial glass powder; A step of adding a silane coupling agent having a cationic active group to the cooled antibacterial glass powder and grinding it to produce an antibacterial glass composition; and The process includes the step of mixing the antibacterial glass composition with a filter resin; The aforementioned antibacterial glass powder is based on 100% by weight of antibacterial glass powder, SiO ２ 26-50% by weight; B ２ O ３ and P ２ O ５ One or more of these in an amount of 0.5 to 4% by weight; Na ２ O and K ２ The sum of O is 15-27% by weight; CaO, MgO and WO ３ One or more of the following in 3 to 20% by weight; and Contains 22 to 44% by weight of one or more of ZnO and SnO; The silane coupling agent having a cationic active group includes a substance synthesized from 3-chloropropyltrimethoxysilane and dimethylbutylamine. A method for producing an antibacterial filter resin composition, wherein the antibacterial filter resin composition comprises 1 to 20% by weight of the antibacterial glass composition, based on 100% by weight of the entire antibacterial filter resin composition.

8. The Na contained in the antibacterial glass powder ２ The content of O and the aforementioned K ２ A method for producing an antibacterial filter resin composition according to claim 7, wherein the content of O satisfies the following relational expression. 0.5 ≤ (Na ２ (Content of O) / (K ２ O content) ≤ 1.5 [Relational expression]

9. The method for producing the antibacterial filter resin composition according to claim 7, wherein the antibacterial glass powder contains 0.1% by weight or less of Ag or an oxide containing Ag.

10. The method for producing the antibacterial filter resin composition according to claim 7, wherein the antibacterial glass powder contains 30% by weight or more of the ZnO.

11. A method for producing an antibacterial filter resin composition according to claim 7, comprising 0.1 to 20 parts by weight of the silane coupling agent having a cationic active group, based on 100 parts by weight of the antibacterial glass powder.

12. A method for producing an antimicrobial filter resin composition according to claim 7, wherein the filter resin comprises one or more of the following: polypropylene, polycarbonate, HIPS (high-impact polystyrene), ABS (acrylonitrile-butadiene-styrene) copolymer, and EPDM (ethylene-propylene-diene monomer) copolymer.

13. It is an antibacterial filter, It comprises a yarn made of a resin composition for antibacterial filters, The aforementioned yarn is woven into a mesh-like structure. The aforementioned resin composition for antibacterial filters is Antimicrobial glass composition; and A filter resin containing a polymer material; The aforementioned antibacterial glass composition is Antibacterial glass powder and It comprises a silane coupling agent having a cationic active group, The aforementioned antibacterial glass powder is based on 100% by weight of antibacterial glass powder, SiO₂ in 26-50% by weight; 0.5 to 4% by weight of one or more of B2O3 and P2O5; The combined amount of Na₂O and K₂O is 15-27% by weight; One or more of CaO, MgO, and WO3 in an amount of 3 to 20% by weight; and It contains 22 to 44% by weight of one or more of ZnO and SnO; The silane coupling agent having a cationic active group includes a substance synthesized from 3-chloropropyltrimethoxysilane and dimethylbutylamine. The antibacterial filter comprises an antibacterial glass composition in an amount of 1 to 20% by weight, based on 100% by weight of the antibacterial resin composition.

14. The diameter of the aforementioned filament is 100 to 150 μm. The antibacterial filter according to claim 13, wherein antibacterial glass having an average particle size of 3 to 5 μm is dispersed in the yarn.

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