Resin composition for antibacterial filters, its manufacturing method, 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 technology]

[0002] Microorganisms such as germs, fungi, and bacteria are ubiquitous in our living spaces, such as sinks, refrigerator shelves, washing machines, air conditioners, humidifiers, air purifiers, etc. If microorganisms enter the human body, they can cause life-threatening infections.

[0003] In particular, household appliances such as air conditioners, humidifiers, and air purifiers can spread microorganisms that are harmful to the human body in enclosed spaces.

[0004] In recent years, attempts have been made to apply antibacterial agents to filters used in air conditioners and humidifiers.

[0005] The filter is manufactured from yarn using a resin component. In the process of manufacturing the filter yarn, the resin is melted and spun into yarn, followed by a drawing process. This produces a long and thin yarn. In this case, only if the draw rate of the yarn is ensured, problems do not occur in the drawing process. However, the antibacterial agent chemically reacts with the resin to damage the polymer chain. This causes a problem of the antibacterial agent lowering the draw rate of the resin. If the draw rate of the yarn is reduced, the yarn is frequently broken during the process of manufacturing the yarn. This reduces the production yield of the yarn. Therefore, in order to improve the filter using the antibacterial agent, it is necessary to improve the process or change the components or content of the antibacterial agent.

[0006] Among antibacterial agents, silver (Ag) is widely used. According to the elution safety standards of the standards and inspection agency designation notice, the amount of eluted silver must be 10 ppb (0.01 mg / L) or less. However, conventional technology has a problem in that the elution of a large amount of silver may cause harm to the human body and the ecosystem. Summary of the Invention [Problem to be solved by the invention]

[0007] An object of the present invention is to provide 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.

[0008] An object of the present invention is to provide a method for producing a resin composition for antibacterial filters, which is harmless to the human body and exhibits antibacterial properties by simply adding an antibacterial glass composition, without changing the existing filter production process.

[0009] Another object of the present invention is to provide a novel antibacterial filter that can be applied to home appliances such as air conditioners, humidifiers, or air purifiers to suppress bacterial growth and improve air hygiene problems.

[0010] The object of the present invention is not limited to the object mentioned above, and other objects and advantages of the present invention not mentioned can be understood from the following description and can be more clearly understood from the embodiments of the present invention. In addition, it can be easily understood that the object and advantages of the present invention can be realized by the means and combinations thereof as set forth in the claims. [Means for solving the problem]

[0011] The resin composition for antibacterial filters according to the present invention includes an antibacterial glass composition and a resin for filters. 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.

[0012] More specifically, the antibacterial filter resin composition according to the present invention comprises an antibacterial glass powder containing, based on 100% by weight of the antibacterial glass powder, 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 in total of Na2O and K2O, 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 functional group; and a filter resin containing a polymer material.

[0013] The composition of the present invention does not develop antibacterial power as the antibacterial agent is decomposed, but has a mechanism in which antibacterial metal ions positively charge the surface of the glass, attracting negatively charged bacteria and preventing the bacteria from growing, thereby making it possible for the present invention to secure semi-permanent antibacterial power.

[0014] As a result, when the antibacterial glass composition of the present invention is used as an additive for plastic injection molding, it not only has excellent antibacterial activity against Escherichia coli and Staphylococcus aureus, but also can effectively remove Pseudomonas aeruginosa, which is a major problematic bacteria that occurs in moist environments where water is present.

[0015] In addition, the resin composition for antibacterial filters of the present invention prevents a decrease in the elongation rate of the resin-based yarn by controlling the components and content of the antibacterial agent, thereby suppressing a decrease in the production yield.

[0016] The manufacturing method of the present invention also includes the steps of producing an antibacterial glass composition and mixing the antibacterial glass composition with a resin for filters. As described above, the manufacturing method of the present invention can produce an antibacterial resin composition for filters having excellent physical properties and antibacterial properties using simple steps.

[0017] The antibacterial filter of the present invention includes a raw yarn made using the resin composition for an antibacterial filter, and the raw yarn is woven into a mesh shape. Effect of the Invention

[0018] The resin composition for antibacterial filters according to the present invention can suppress the proliferation of bacteria in filters applied to home appliances such as air conditioners, humidifiers, and air purifiers, thereby improving air hygiene problems.

[0019] In particular, the resin composition for antibacterial filters of the present invention can prevent a decrease in the draw ratio of the raw yarn using the resin by controlling the components and content of the antibacterial agent, thereby suppressing a decrease in the production yield.

[0020] The antibacterial glass composition applied to the present invention contains SiO2, a glass former, as a main component, and the antibacterial metal ions added to the glass make the surface charge (zeta potential) of the glass positively charged. This attracts bacteria, which are normally negatively charged, and creates an electrically charged atmosphere in which bacteria cannot grow, thereby killing the bacteria.

[0021] As a result, the antibacterial filter of the present invention not only has excellent antibacterial activity against Escherichia coli and Staphylococcus aureus, but may also be capable of effectively removing Pseudomonas aeruginosa, which is a major problematic bacteria that occurs in moist environments where water is present.

[0022] Moreover, the antibacterial filter according to the present invention has high thermal stability and durability, and compensates for the slow antibacterial effect, which is a drawback of inorganic antibacterial agents.

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

[0024] [Figure 1] FIG. 2 is a schematic diagram illustrating a portion of an antibacterial filter according to an embodiment of the present invention. [Diagram 2] 1 is a SEM photograph showing an antibacterial filter according to an embodiment of the present invention. [Diagram 3]1 is a SEM photograph showing an antibacterial filter according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

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

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

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

[0028] <Resin composition for antibacterial filters> The antibacterial glass composition applied to the antibacterial filter resin composition of the present invention has insolubility by adjusting each component and the component ratio, and thus ensures semi-permanent durability of antibacterial activity.

[0029] Moreover, the antibacterial glass composition is made of ingredients which are harmless to the human body, has high heat resistance and high water resistance, and can maintain its antibacterial function semi-permanently.

[0030] The antibacterial glass composition does not exhibit antibacterial power as the antibacterial agent is decomposed, but rather the antibacterial metal ions positively charge the surface of the glass, thereby attracting negatively charged bacteria and preventing them from growing, thereby ensuring semi-permanent antibacterial power.

[0031] As a result, when the antibacterial glass composition is used as an additive for an antibacterial filter, it not only has excellent antibacterial activity against Escherichia coli and Staphylococcus aureus, but also can effectively remove Pseudomonas aeruginosa, which is a major problem in moist environments where water is present.

[0032] In addition, the antibacterial glass composition has a form in which the above-mentioned inorganic antibacterial glass and antibacterial organic substance are combined, and thus has high thermal stability and antibacterial durability, and compensates for the slow antibacterial effect, which is a drawback of inorganic antibacterial agents.

[0033] In addition, the resin composition for antibacterial filters of the present invention, in particular, controls the components and content of the antibacterial agent in the antibacterial glass composition, thereby preventing a decrease in the elongation rate of the raw yarn using the resin and suppressing a decrease in the production yield.

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

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

[0036] Here, the antibacterial glass composition must contain a glass former in order to become glass, and must contain a modifier oxide to melt the glass former into a homogeneous and amorphous form so that the glass can be easily realized under glass melting conditions (about 900 to 1600°C).

[0037] The most commonly used glass formers commercially are SiO2, B2O3, and P2O5, and glass made of a large amount of B2O3 and P2O5 has strong hygroscopicity, and many OH groups derived from moisture in the air are adsorbed on the surface, resulting in a negative surface charge, which acts as a factor inhibiting the antibacterial activity of the glass.

[0038] Thus, the present invention provides a novel silicate-based antimicrobial glass composition that contains intentionally low additions of B2O3 and P2O5 and is based on the glass former SiO2.

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

[0040] SiO2 is a glass former that enables vitrification and is a core component that acts as the structural skeleton of glass. Although SiO2 does not directly act as a component that exerts antibacterial activity, it is advantageous in forming fewer OH groups on the glass surface compared to P2O5, a typical glass former, and making the glass surface positively charged by the metal ions in the glass.

[0041] These SiO2 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, resulting in a decrease in workability and yield during the cooling process. On the other hand, if SiO2 is added in an amount less than 26% by weight, there is a problem that the structure of the glass is weakened, resulting in a decrease in water resistance.

[0042] On the other hand, glass made of a large amount of B2O3 and P2O5 has high hygroscopicity, and many OH groups derived from moisture in the air are adsorbed on the surface, resulting in a negative surface charge. This acts as a factor that inhibits the antibacterial activity of the glass. Therefore, the present invention has developed a new antibacterial glass composition that minimizes the addition of B2O3 and P2O5 and is mainly composed of SiO2, a glass former.

[0043] That is, SiO2 plays a role in strengthening the glass structure, but when used as a single component as a glass former, the viscosity becomes too high during melting, and a very high melting temperature is required 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 production.

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

[0045] If one or more of B2O3 and P2O5 are added in a large amount exceeding 4 wt%, the water resistance of the glass may decrease and it may become easy for dissolution to occur in water.On the other hand, if one or more of B2O3 and P2O5 are added in an amount less than 0.5 wt%, the workability and yield in glass production may decrease.

[0046] Alkali oxides such as Na2O and K2O are oxides that act as non-crosslinking network modifiers in glass compositions. Although these components cannot be vitrified by themselves, they can be vitrified when mixed with glass formers such as SiO2 and B2O3 in a certain ratio. If only one of these components is included in a glass composition, it can weaken the durability of the glass within the range where vitrification is possible. However, if two types of components are included together in a 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 total content ratio of 15 to 27 wt% based on 100 wt% of the antibacterial glass powder according to the present invention. If Na2O and K2O are added in a large amount exceeding 27 wt%, the thermal properties of the glass composition may be deteriorated. On the other hand, if Na2O and K2O are added in a total content of less than 15 wt%, it is difficult to control the valence of components such as ZnO, and the antibacterial properties may be deteriorated.

[0048] In addition, preferably, the Na2O content and the K2O content can satisfy the following relationship:

[0049] [Equation] 0.5≦(Na2O content) / (K2O content)≦1.5

[0050] If the Na2O content and the K2O content do not satisfy the above relationship, the effect of lowering the melting point due to the eutectic point decreases, and it may become 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] At least one of CaO, MgO and WO3 is an oxide that acts as a non-crosslinking network modifier in the glass composition, similar to an alkali oxide. If at least one of CaO, MgO and WO3 is added in a large amount exceeding 20% ​​by weight, the thermal properties of the glass composition may be deteriorated. Conversely, if at least one of CaO, MgO and WO3 is added in an amount less than 3% by weight, the structure of the glass may be weakened, the durability may be reduced and the antibacterial performance may also be reduced.

[0053] Next, the antibacterial glass powder of the present invention contains at least one of ZnO and SnO as a component that exhibits antibacterial performance.

[0054] At least one of ZnO and SnO is contained in an amount of 22 to 44% by weight based on 100% by weight of the antibacterial glass powder according to the present invention. When at least one of ZnO and SnO is added in an amount of less than 22% by weight, the antibacterial properties of the glass composition are difficult to exhibit. On the other hand, when at least one of ZnO and SnO is added in a large amount exceeding 44% by weight, the durability and thermal properties of the glass composition may be deteriorated. 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 raw yarn and a decrease in the production yield of the raw yarn by containing at least one of ZnO and SnO in an amount of 22 to 44% by weight in the antibacterial glass powder compared to other components. At least one of ZnO and SnO exhibits antibacterial performance, but chemically reacts with the filter resin to reduce the elongation rate of the raw yarn. For this reason, the antibacterial agent contained in the antibacterial filter resin composition needs to control the type and content of the antibacterial component. The present invention prevents a decrease in the elongation rate of the raw yarn by controlling the content of other components and at least one of ZnO and SnO.

[0056] In addition, conventional antibacterial compositions contain various antibacterial components such as Ag and Ag oxides to exert antibacterial power (coverage against various bacteria). However, when an injection product to which an Ag component is applied is exposed to light for a long period of time, color changes occur. The present invention exerts antibacterial power using Zn and Sn without containing Ag or Ag oxides, thereby suppressing the above-mentioned side effects. Although it is preferable that the antibacterial glass composition of the present invention does not contain Ag or Ag oxides as much as possible, it may contain Ag3PO4 or AgNO3 in an amount of 0.1 wt% or less based on 100 wt% of the antibacterial glass powder, if necessary.

[0057] Next, the antibacterial glass composition contains a silane coupling agent having a cationic functional group in addition to the above-mentioned antibacterial glass powder.

[0058] Here, the cationic functional group may include at least one selected from the group consisting of a quaternary ammonium salt, an imidazolium group, a piperidinium group, a morpholinium group, a pyridinium group, and a pyrrolidinium group.

[0059] The silane coupling agent may include one or more of γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-mercaptopropyltrimethoxysilane, γ-mercaptopropyltriethoxysilane, and a silane coupling agent 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 a methyl or ethyl group; n is a constant from 1 to 10.

[0061] Thus, the present invention includes an antibacterial glass powder, which is an inorganic antibacterial agent, and also includes a silane coupling agent having a cationic functional group to maximize the performance of the antibacterial glass powder. More specifically, the silane coupling agent having a cationic functional group is bonded to the surface of the antibacterial glass powder. The cationic functional group interacts with the cell membrane of bacteria, which has a negative charge, to exhibit antibacterial properties. In addition, when the antibacterial glass composition of the present invention is applied to a polymer, it is advantageous in improving the mechanical properties and dispersibility of the polymer. The silane coupling agent is used as an intermediate that connects the antibacterial inorganic material (glass powder) and the organic material (cationic functional group).

[0062] The silane coupling agent having a cationic functional group may be contained in an amount of preferably 0.1 to 20 parts by weight, and most preferably 0.1 to 5 parts by weight, based on 100 parts by weight of the antibacterial glass powder.

[0063] Here, the antibacterial filter resin composition of the present invention may contain 1 to 20% by weight of the above-mentioned antibacterial glass composition based on the total weight of 100%. If the content 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 content of the antibacterial glass composition exceeds 20% by weight, the durability and elongation rate of the filter may be decreased.

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

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

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

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

[0068] mixture In the mixing step, first, an antibacterial glass powder is produced, and the antibacterial glass powder contains, based on 100% by weight of the antibacterial glass powder, 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 in total of Na2O and K2O, 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.

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

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

[0071] In this step, the melting is preferably carried out at 1,100 to 1,400°C for 1 to 60 minutes. If the melting temperature is less than 1,200°C or the melting time is less than 1 minute, the antibacterial glass powder cannot be completely melted, which may cause immiscibility of the molten glass. On the other hand, if the melting temperature exceeds 1,300°C or the melting time exceeds 60 minutes, excessive energy and time are required, which is not economical.

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

[0073] In this stage, the cooling is preferably performed in a furnace cooling manner, since if air cooling or water cooling is applied, excessive internal stress of the antibacterial glass may be formed, which may cause cracks in some cases, and therefore the cooling is preferably performed in a furnace.

[0074] Crushing In the pulverization step, the cooled antibacterial glass is pulverized. At this time, it is preferable to use a dry pulverizer for pulverization. For example, the dry pulverizer may be a ball mill process or a zet mill process. In these pulverization steps, a silane coupling agent having a cationic functional group is added to the antibacterial glass powder.

[0075] The above-mentioned grinding process finely grinds the antibacterial glass to produce an antibacterial glass composition containing the antibacterial glass powder and the silane coupling agent having a cationic functional 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.

[0076] Through the above process, the antibacterial glass composition according to the embodiment of the present invention can be manufactured.

[0077] Next, the antibacterial glass composition and a resin for filters are mixed to produce the antibacterial resin composition for filters of the present invention.

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

[0079] <Antibacterial filter> Next, the antibacterial filter of the present invention will be described. Referring to Fig. 1, the antibacterial filter 10 of the present invention is a filter including a raw yarn (F) made of the resin composition for antibacterial filters obtained by the above-mentioned manufacturing method, and the raw yarn (F) is woven into a mesh.

[0080] The original yarn (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 original yarn (F). Here, the average particle size means the average value for the particle sizes of at least 10 or more antibacterial glass particles (AG).

[0081] Working Example Hereinafter, the configuration and operation of the present invention will be described in more detail with reference to preferred embodiments of the present invention, which are presented as preferred examples of the present invention and are not to be construed as limiting the present invention in any sense.

[0082] Contents not described here will not be explained since those skilled in the art can easily deduce them from a technical standpoint.

[0083] 1. Production of resin composition for antibacterial filters The antibacterial glass composition having the composition shown in Table 1 was melted in an electric furnace at a temperature of 1,250°C, and then cullets having a thickness of 1 mm or less were obtained using a quenching twin roll.

[0084] Here, the raw materials used for Na2O, K2O, and CaO were Na2CO3, K2CO3, and CaCO3, respectively, and the other ingredients were the same as those listed in Table 1. Vitrification was classified based on whether it exhibited homogeneous glass properties or the phenomenon of milkiness / unmelted material occurring.

[0085] The produced glass was pulverized in a dry grinding machine (ball mill or jet mill) to produce powder with an average particle size of 3 to 6 μm.

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

[0087] The silane coupling agent used for the synthesis with cationic functional groups was 3-Chloropropyltrimethoxysilane. 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, producing the following material.

[0088] [ka]

[0089] Next, in order to synthesize a quaternary ammonium salt and a silane coupling agent, 3-chloropropyltrimethoxysilane and dimethylbutylamine were synthesized in a molar ratio of 1:0.909 at 90°C for 24 hours to produce the following substance.

[0090] [ka]

[0091] Then, the antibacterial glass powder produced as above and a silane coupling agent having a cationic functional group were synthesized.

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

[0093] A filter resin containing polypropylene as the main resin was prepared, and then 10 wt % of the antibacterial glass composition and 90 wt % of the filter resin were mixed to produce a filter resin composition.

[0094] The presence or absence of vitrification and the content of the silane coupling agent in the examples and comparative examples are shown in Table 2. In examples 1 and 2, a silane coupling agent using imidazolium was used, and in examples 3 and 4 and comparative example 2, a silane coupling agent using a quaternary ammonium salt was used.

[0095] [Table 1]

[0096] [Table 2]

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

[0098] 2. Manufacturing of antibacterial filters The resin composition for antibacterial filters prepared as above was extruded to produce pellets, and the pellets were fed into a filter spinning machine to spin and draw fibers to produce yarns.

[0099] The fabricated yarns were crossed perpendicularly to each other on a weaving machine to form 30~40 meshes. The meshes woven in the form of fabric were then insert-injected and combined with a frame to produce a filter.

[0100] 3. Evaluation of antibacterial filters (1) Antibacterial filter structure 2 and 3, there are shown SEM photographs of the filter manufactured in Example 1 of the present invention. It can be seen that antibacterial glass is finely distributed in the raw yarn of the filter according to the embodiment of the present invention.

[0101] (2) Physical property evaluation A tensile test was carried out on the filter of Example 1. When a force of 3.5 kgf was applied using a push-pull gauge, the mesh of the filter of Example 1 was not torn.

[0102] (3) Antibacterial test evaluation Next, the antibacterial activity value against Staphylococcus aureus and Escherichia coli was confirmed for each filter based on the antibacterial standard test (ISO 20743, textile antibacterial test method).

[0103] [Table 3]

[0104] As shown in Table 3, it can be seen that the filters manufactured according to the examples have superior antibacterial activity compared to the specimens according to the comparative examples.

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

[0106] When the antibacterial activity of the filter of Example 1 and the filter of Comparative Example 2 was compared, the initial antibacterial performance of both filters was at the same level, but the antibacterial activity after water immersion was superior in the filter of Example 1. This shows that the antibacterial filter to which the antibacterial glass of the present invention is applied has excellent durability even in an aging filter environment.

[0107] [Table 4]

[0108] (5) Filter yarn spinning test, antibacterial activity life test A spinning test was carried out on the free filter raw yarn of Example 1 and Comparative Example 2. The number of holes in the nozzle of the spinning machine was 120. In the case of Example 1, no problems such as nozzle clogging occurred.

[0109] However, the ZnO-based antibacterial agent causes resin hardening due to chemical reaction with the filter resin, which makes it impossible to spin the existing amount of raw yarn. These problems not only reduce the manufacturing yield but also the production volume.

[0110] Although the present invention has been described above with reference to the illustrative drawings, the present invention is not limited to the embodiments and drawings disclosed in this specification, and it is clear that various modifications can be made by those skilled in the art within the scope of the technical concept of the present invention. Furthermore, even if the effects of the configuration of the present invention are not explicitly described in the above-mentioned embodiments of the present invention, it is natural that the effects that can be predicted by the configuration should also be recognized.

[0111] [Invention as claimed in the international patent application] [Claim 1] Based on 100% antibacterial glass powder by weight, 26-50 wt% SiO2; 0.5 to 4% by weight of one or more of B2O3 and P2O5; Na2O and K2O, 15 to 27% by weight in total; 3 to 20% by weight of one or more of CaO, MgO, and WO3; and An antibacterial glass powder containing 22 to 44% by weight of one or more of ZnO and SnO; An antibacterial glass composition comprising a silane coupling agent having a cationic functional group; and An antibacterial filter resin composition comprising: a filter resin containing a polymeric material. [Claim 2] 2. The antibacterial filter resin composition according to claim 1, wherein the Na2O content and the K2O content satisfy the following relational formula: 0.5≦(Na2O content) / (K2O content)≦1.5 [Equation] [Claim 3] 2. The resin composition for an antibacterial filter according to claim 1, wherein the antibacterial glass powder contains 0.1% by weight or less of Ag or an oxide containing Ag. [Claim 4] 2. The antibacterial filter resin composition according to claim 1, wherein the antibacterial glass powder contains 30% by weight or more of the ZnO. [Claim 5] the cationic functional group is at least one selected from the group consisting of a quaternary ammonium salt, an imidazolium group, a piperidinium group, a morpholinium group, a pyridinium group, and a pyrrolidinium group; The resin composition for antibacterial filters according to claim 1, wherein the silane coupling agent comprises at least one selected from the group consisting of γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-mercaptopropyltrimethoxysilane, γ-mercaptopropyltriethoxysilane, and a silane coupling agent 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 a methyl or ethyl group; n is a constant from 1 to 10. [Claim 6] 2. The resin composition for an antibacterial filter according to claim 1, comprising 0.1 to 20 parts by weight of the silane coupling agent having a cationic functional group based on 100 parts by weight of the antibacterial glass powder. [Claim 7] 2. The antibacterial filter resin composition according to claim 1, wherein the filter resin comprises at least one of polypropylene, polycarbonate, HIPS (high-impact polystyrene), ABS (acrylonitrile-butadiene-styrene) copolymer, and EPDM (ethylene-propylene-diene monomer) copolymer. [Claim 8] The antibacterial filter resin composition comprises: 2. The resin composition for antibacterial filters according to claim 1, wherein the antibacterial glass composition contains 1 to 20% by weight based on 100% by weight of the entire antibacterial glass composition. [Claim 9] A method for producing an antibacterial filter resin composition, comprising: producing an antibacterial glass powder; melting the antibacterial glass powder; cooling the molten antimicrobial glass powder; adding a silane coupling agent having a cationic functional group to the cooled antibacterial glass powder and pulverizing the mixture to prepare an antibacterial glass composition; and mixing the antimicrobial glass composition with a filter resin; The antibacterial glass powder is, based on 100% by weight of the antibacterial glass powder, 26-50 wt% SiO2; 0.5 to 4% by weight of one or more of B2O3 and P2O5; Na2O and K2O, 15 to 27% by weight in total; 3 to 20% by weight of one or more of CaO, MgO, and WO3; and A method for producing a resin composition for antibacterial filters, comprising 22 to 44% by weight of at least one of ZnO and SnO. [Claim 10] 10. The method for producing a resin composition for an antibacterial filter according to claim 9, wherein the Na2O content and the K2O content contained in the antibacterial glass powder satisfy the following relational formula: 0.5≦(Na2O content) / (K2O content)≦1.5 [Equation] [Claim 11] 10. The method for producing a resin composition for an antibacterial filter 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] 10. The method for producing a resin composition for an antibacterial filter according to claim 9, wherein the antibacterial glass powder contains 30% by weight or more of the ZnO. [Claim 13] the cationic functional group is at least one selected from the group consisting of a quaternary ammonium salt, an imidazolium group, a piperidinium group, a morpholinium group, a pyridinium group, and a pyrrolidinium group; 10. The method for producing a resin composition for an antibacterial filter according to claim 9, wherein the silane coupling agent comprises at least one selected from the group consisting of γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-mercaptopropyltrimethoxysilane, γ-mercaptopropyltriethoxysilane, and a silane coupling agent 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 a methyl or ethyl group; n is a constant from 1 to 10. [Claim 14] 10. The method for producing a resin composition for an antibacterial filter according to claim 9, wherein the silane coupling agent having a cationic functional group is contained in an amount of 0.1 to 20 parts by weight based on 100 parts by weight of the antibacterial glass powder. [Claim 15] 10. The method for producing a resin composition for antibacterial filters according to claim 9, wherein the resin for filters comprises at least one of polypropylene, polycarbonate, HIPS (high-impact polystyrene), ABS (acrylonitrile-butadiene-styrene) copolymer, and EPDM (ethylene-propylene-diene monomer) copolymer. [Claim 16] The antibacterial filter resin composition comprises: 10. The method for producing a resin composition for an antibacterial filter according to claim 9, wherein the antibacterial glass composition contains 1 to 20% by weight based on 100% by weight of the entire antibacterial glass composition. [Claim 17] An antibacterial filter, The antibacterial filter resin composition according to claim 9 is used in the manufacturing method thereof. The yarn is woven into a mesh-like shape to provide an antibacterial filter. [Claim 18] The diameter of the raw yarn is 100 to 150 μm, 18. The antibacterial filter according to claim 17, wherein antibacterial glass having an average particle size of 3 to 5 μm is dispersed in the raw yarn.

Claims

1. Based on 100% by weight of antibacterial glass powder, SiO ２ 26 to 50% by weight; B ２ O ３ and P ２ O ５ 0.5 to 4% by weight of one or more of the following: Na ２ O and K ２ 15 to 27 wt. % combined O; CaO, MgO and WO ３ 3 to 20% by weight of one or more of the following: an antibacterial glass powder containing 22 to 44 wt % of one or more of ZnO and SnO; An antibacterial glass composition comprising a silane coupling agent having a cationic functional group; and An antibacterial filter resin composition comprising: a filter resin containing a polymeric material.

2. The Na ２ The content of O and the K ２ The antibacterial filter resin composition according to claim 1 , wherein the content of O satisfies the following relational formula: 0.5≦(Na ２ O content) / (K ２ O content)≦1.5 [Relationship formula]

3. 2. The resin composition for an antibacterial filter according to claim 1, wherein the antibacterial glass powder contains 0.1 wt % or less of Ag or an oxide containing Ag.

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

5. the cationic functional group is at least one selected from the group consisting of a quaternary ammonium salt, an imidazolium group, a piperidinium group, a morpholinium group, a pyridinium group, and a pyrrolidinium group; The silane coupling agent is selected from the group consisting of γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-mercaptopropyltrimethoxysilane, γ-mercaptopropyltriethoxysilane, and silane coupling agents represented by the following chemical formula: The resin composition for antibacterial filters according to claim 1. P. ２ CHO) ｎ CH ２ CH ２ CH ２ CSi(OR') ３ [In the above formula, R is a methyl group, an ethyl group or hydrogen; R' is a methyl group or an ethyl group; n is a constant from 1 to 10.

6. 2. The resin composition for antibacterial filters according to claim 1, comprising 0.1 to 20 parts by weight of the silane coupling agent having a cationic functional group based on 100 parts by weight of the antibacterial glass powder.

7. The filter resin according to claim 1, comprising at least one of polypropylene, polycarbonate, HIPS (high-impact polyethylene), ABS (acrylonitrile-butadiene-styrene) copolymer, and EPDM (ethylene-propylene-diene monomer) copolymer. The antibacterial filter resin composition according to claim 1,

8. The antibacterial filter resin composition comprises:

2. The resin composition for antibacterial filters according to claim 1, wherein the antibacterial glass composition comprises 1 to 20% by weight of the antibacterial glass composition.

9. A method for producing an antibacterial filter resin composition, comprising: Producing an antimicrobial glass powder; melting the antimicrobial glass powder; cooling the molten antimicrobial glass powder; adding a silane coupling agent having a cationic functional group to the cooled antibacterial glass powder and pulverizing the mixture to prepare an antibacterial glass composition; and mixing the antimicrobial glass composition with a filter resin; The antibacterial glass powder is, based on 100% by weight of the antibacterial glass powder, SiO ２ 26 to 50% by weight; B ２ O ３ and P ２ O ５ 0.5 to 4% by weight of one or more of the following: Na ２ O and K ２ 15 to 27 wt. % combined O; CaO, MgO and WO ３ 3 to 20% by weight of one or more of the following: A method for producing a resin composition for an antibacterial filter, comprising: 22 to 44% by weight of at least one of ZnO and SnO.

10. The Na contained in the antibacterial glass powder ２ The content of O and the K ２ The method for producing an antibacterial filter resin composition according to claim 9, wherein the content of O satisfies the following relational formula: 0.5≦(Na ２ O content) / (K ２ O content)≦1.5 [Relationship formula]

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

12. 10. The method for producing an antibacterial filter resin composition according to claim 9, wherein the antibacterial glass powder contains 30% by weight or more of the ZnO.

13. the cationic functional group is at least one selected from the group consisting of a quaternary ammonium salt, an imidazolium group, a piperidinium group, a morpholinium group, a pyridinium group, and a pyrrolidinium group; The silane coupling agent is at least one selected from the group consisting of γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-mercaptopropyltrimethoxysilane, γ-mercaptopropyltriethoxysilane, and a silane coupling agent represented by the following chemical formula: The method for producing a resin composition for an antibacterial filter according to claim 9. P. ２ CHO) ｎ CH ２ CH ２ CH ２ CSi(OR') ３ [In the above formula, R is a methyl group, an ethyl group or hydrogen; R' is a methyl group or an ethyl group; n is a constant from 1 to 10.

14. The method for producing a resin composition for an antibacterial filter according to claim 9, wherein the silane coupling agent having a cationic functional group is contained in an amount of 0.1 to 20 parts by weight based on 100 parts by weight of the antibacterial glass powder.

15. The method for producing a resin composition for antibacterial filters according to claim 9, wherein the resin for filters includes at least one of polypropylene, polycarbonate, HIPS (high-impact polyethylene), ABS (acrylonitrile-butadiene-styrene) copolymer, and EPDM (ethylene-propylene-diene monomer) copolymer.

16. The antibacterial filter resin composition comprises: The method for producing a resin composition for an antibacterial filter according to claim 9, wherein the antibacterial glass composition contains 1 to 20% by weight of the resin composition, based on 100% by weight of the total antibacterial glass composition.

17. An antibacterial filter, The antibacterial filter is provided with a raw yarn using the resin composition for an antibacterial filter produced by the production method according to claim 9, The yarn is woven into a mesh-like shape to provide an antibacterial filter.

18. The diameter of the yarn 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 raw yarn.

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