KR102582713B1 - Antibacterial composite glass composition and home electric appliance using the same - Google Patents

Abstract

The present invention relates to an antibacterial composite glass composition, and more specifically, to an antibacterial composite glass composition in which an elutable glass composition (composition A) and a non-elutable glass composition (composition B) are mixed at a weight ratio of 10:90 to 30:70. By applying the antibacterial resin mixture composition mixed with plastic resin to home appliances, both antibacterial properties against microorganisms and anti-biofilm properties (biofilm reduction rate) are excellently expressed.

Description

Antibacterial composite glass composition and home appliances using the same {ANTIBACTERIAL COMPOSITE GLASS COMPOSITION AND HOME ELECTRIC APPLIANCE USING THE SAME}

The present invention relates to an antibacterial composite glass composition and home appliances to which the same is applied.

Microorganisms such as germs, fungi, and bacteria are omnipresent in our living spaces, such as dryers, washing machines, or dishwashers. If these microorganisms enter our bodies, they can cause life-threatening infections.

In particular, water remaining on the surfaces of home appliances that use water, such as dryers, stylers, washing machines, and air conditioners, and in drains, causes abnormal growth of bacteria and mold, and biofilms are formed accordingly. A method is required to secure excellent antibacterial activity against highly contaminated areas, that is, an excellent biofilm reduction rate.

U.S. Patent Application Publication No. 2019-0373897 (“Prior Patent Document 1”) includes glass that may include a glass phase and a cuprite phase. In a specific example, the glass has a degradable phase comprising a plurality of Cu ¹⁺ ions, B ₂ O ₃ , P ₂ O ₅ and K ₂ O and a durable phase comprising SiO ₂ Includes (a durable phase). During the glass formation process, the phases are separated into _a SiO _{2 -rich} phase and a copper- _{B 2} O ₃ -P _{2 O 5 -rich} phase. This technology discloses that cuprite (Cu ₂ O) is eluted from a decomposable phase and exhibits antibacterial activity.

Additionally, Japanese Patent Application Publication No. 2005-500972 (“Prior Patent Document 2”) discloses an invention related to water-insoluble (water-insoluble) antibacterial silicate glass powder. It is defined that the base glass that makes up the water-insoluble glass does not dissolve in water, and only the surface reacts with the surrounding water to exchange ions, and in order to obtain a sufficient sterilizing effect in the applied product, all metal ions of the glass are removed. Considering the synergistic effect, the elution is disclosed to be 50 to 10 ppm (for pH values of 9 to 13) and less than 1 ppm to 100 ppb (for pH values of 9 to 13).

The non-elutable antibacterial glass claimed in the above prior patent documents 1 and 2 does not mean that the entire glass is non-elutable, but refers to glass composed of a water-insoluble glass matrix and ions or crystalline components that are eluted for antibacterial purposes. It is named as non-occurring. In other words, in order to exhibit antibacterial activity, ions or crystal phases expressing antibacterial activity are eluted to exhibit antibacterial activity.

However, since it does not exhibit antibacterial activity at the level necessary to prevent highly contaminated areas where biofilms are formed and to exert antibacterial activity, there is a problem in that it is unsuitable and insufficient for compositions for antibacterial and anti-contamination purposes in highly contaminated areas.

Therefore, there is still a need to develop technology for an antibacterial glass composition that can be used for a long period of time and ensure human safety while demonstrating sufficient antibacterial activity against highly contaminated areas formed on the surfaces of home appliances where water is used, sewers, etc. exist.

(Prior patent document 1) US Patent Application Publication No. 2019-0373897 (US 2019-0373897 A1) (Prior patent document 2) Japanese Patent Application Publication No. 2005-500972 (JP 2005-500972 A)

The purpose of the present invention is to provide a composite glass composition that prevents contamination of highly contaminated parts of home appliances where water is used, especially parts that are highly contaminated enough to form biofilms, and exhibits sufficient antibacterial activity, and home appliances using the same. Do it as

The purpose of the present invention is to provide a composite glass composition that selectively produces an antibacterial effect depending on the contamination environment of home appliances in which water is used, can be used for a long period of time, and can also ensure human safety, and home appliances using the same. do.

The objects of the present invention are not limited to the objects mentioned above, and other objects and advantages of the present invention that are not mentioned can be understood by the following description and will be more clearly understood by the examples of the present invention. Additionally, it will be readily apparent that the objects and advantages of the present invention can be realized by the means and combinations thereof indicated in the patent claims.

In order to solve the above-described technical problem, the antibacterial composite glass composition according to the present invention is a dissolvable glass composition capable of controlling the environment in which bacteria grow (hereinafter, dissolvable glass composition refers to the same object as “composition A”) an antibacterial composite glass composition including a non-eludable glass composition that can exhibit antibacterial properties due to the surface charge characteristics of the material (hereinafter, the non-eludable glass composition is defined to refer to the same object as “composition B”) It is a technical feature.

The antibacterial composite glass composition of the present invention exhibits antibacterial properties by eluting zinc ions from the non-elutable glass composition (composition B) that exhibits antibacterial properties in a normal environment and the control of the pH environment. It is characterized in that it contains a glass composition (composition A), and can exhibit a synergy effect of the two glass compositions, and can have selective antibacterial activity depending on the contaminated environment.

Specifically, in the antibacterial composite glass composition according to the present invention, the elutable glass composition (composition A) contains 40 to 70% by weight of SiO ₂ ; 5 to 20% by weight of one or more of Na ₂ O, K ₂ O and Li ₂ O; CaO 10-45% by weight; and 10 to 40% by weight of MgO, and the non-elutable glass composition (composition B) contains 26 to 45% by weight of SiO ₂ ; 0.5 to 4% by weight of one or more of B ₂ O ₃ and P ₂ O ₅ ; 15 to 25% by weight of one or more of Na ₂ O and K ₂ O; CaO 3-10% by weight; and 25 to 45% by weight of ZnO. At this time, the total weight% of the components of the eluable glass composition (composition A) is 100% by weight, and the components of the non-eluable glass composition (composition B) are 100% by weight. The sum of these weight percentages is 100 weight%.

More specifically, in the soluble glass composition (composition A) of the antibacterial composite glass composition according to the present invention, the sum of the contents of CaO and MgO is 30% by weight or more, and the content of CaO is greater than the content of MgO, Antibacterial activity and vitrification performance can be improved.

In addition, in the non-elutable glass composition (composition B), the content of SiO ₂ is greater than the content of B ₂ O ₃ , the sum of the contents of Na ₂ O, K ₂ O and CaO is 20% by weight or more, and the content of ZnO By making it more than the sum of the contents of Na ₂ O, K ₂ O and CaO, antibacterial activity and durability can be improved.

In addition, the antibacterial composite glass composition according to the present invention is prepared by mixing the elutable glass composition (composition A) and the non-elutable glass composition (composition B) at a weight ratio of 10:90 to 30:70, thereby forming a highly contaminated area where biofilm is formed. It has excellent antibacterial activity (anti-biofilm properties), while ensuring long-term usability and human safety.

The antibacterial composite glass composition according to the present invention can be added to plastic resin, a material for manufacturing home appliances. At this time, in order to ensure both antibacterial activity and moldability, it is preferable to include 3 to 10 parts by weight of the antibacterial composite glass composition according to the present invention based on 100 parts by weight of the plastic resin.

The antibacterial composite glass composition according to the present invention is a composition that is a mixture of an elutable glass composition (composition A) and a non-elutable glass composition (composition B), and when home appliances are manufactured using a plastic resin to which the mixed composition is added, , it can exhibit excellent antibacterial activity even in highly contaminated areas of home appliances, especially biofilms.

In particular, the antibacterial composite glass composition according to the present invention can selectively exert antibacterial activity depending on the contamination environment of the home appliance due to the combination of the eluable glass composition (composition A) and the non-eluable glass composition (composition B).

Specifically, the antibacterial composite glass composition of the present invention has antibacterial properties by eluting zinc ions from the non-eludable glass composition (composition B) that exhibits antibacterial properties in a normal environment and the pH environment by controlling the resulting non-eludable glass composition (composition B). It is characterized by comprising a dissolvable glass composition (A) representing, and can exhibit a synergistic effect of the two glass compositions.

In addition, the antibacterial composite glass composition of the present invention can be used for a long period of time (continuously) in home appliances and has excellent safety for the human body.

The antibacterial composite glass composition of the present invention can exhibit excellent antibacterial activity of more than 99% against microorganisms. For example, the microorganisms include Escherichia coli , Staphylococcus aureus , Klebsiella pneumoniae , and Pseudomonas aeruginosa . aeruginosa ).

The antibacterial composite glass composition of the present invention has excellent anti-biofilm performance and, specifically, can exhibit a biofilm reduction rate of 90% or more.

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

The above-described objects, features, and advantages will be described in detail below with reference to examples, so that those skilled in the art will be able to easily implement the technical idea of the present invention. In describing the present invention, if it is determined that a detailed description of known technologies related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments according to the present invention will be described in detail.

As used herein, singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as “consists of” or “includes” should not necessarily be construed as including all of the various components described in the specification, and some of the components may not be included, or additional components may be included. It should be interpreted as being able to include more elements.

Hereinafter, an antibacterial composite glass composition including an eluable glass composition (composition A) and a non-elutable glass composition (composition B) according to the present invention will be described in detail.

<Antibacterial composite glass composition>

The antibacterial composite glass composition according to the present invention is a mixed composition of a dissolvable glass composition (composition A) and a non-eludable glass composition (composition B), and the dissolvable glass composition and the non-eludable glass composition are mixed in a ratio of 10:90 to 30: It is preferable to mix at a weight ratio of 70.

That is, when the total composition including the soluble glass composition and the non-elutable glass composition is 100 parts by weight, the soluble glass composition is preferably included in an amount of 10 to 30 parts by weight.

If the content of the soluble glass composition relative to the entire composition is less than 10 parts by weight, the pH of the water cannot be sufficiently raised, so the intended effect of the soluble glass composition alone and/or when mixed with a non-elutable glass composition is not achieved. The biofilm reduction effect may not be excellent because it does not have a combined effect.

In addition, if the content of the elutable glass composition relative to the entire composition exceeds 30 parts by weight, the pH of the water is raised too high, and the alkali ions, alkaline earth ions of composition A, and zinc (Zn) ions of the non-elutable glass composition are consumed. As the speed increases, it may be unsuitable for continuous use over a long period of time.

Hereinafter, the elutable glass composition (composition A) and the non-elutable glass composition (composition B) included in the antibacterial composite glass composition according to the present invention will be described in detail.

Compositional components of glass compositions

SiO ₂ is a network-forming oxide and is an essential glass former for forming glass. In terms of the structure of glass, it is a key ingredient that acts as a framework. If SiO ₂ is included in more than an appropriate amount, the viscosity increases when the glass is melted, which reduces workability and yield during the cooling process.

B ₂ O ₃ and P ₂ O ₅ are representative network-forming oxides and, together with SiO ₂ , are key components that enable sufficient vitrification. B ₂ O ₃ and P ₂ O ₅ have a low melting point and are used to lower the eutectic point of the melt. In addition, B ₂ O ₃ and P ₂ O ₅ help create homogeneous glass by increasing the solubility of rigid components (Al ₂ O ₃ , CuO, etc.) during melting for vitrification. . However, if B ₂ O ₃ and P ₂ O ₅ are added above a certain level, problems such as weakening the bonding structure of the glass and lowering water resistance may occur. Therefore, it is preferable to use small amounts of B ₂ O ₃ and P ₂ O ₅ solely to lower the melting point to create water-insoluble antibacterial glass.

Alkali oxides such as Na ₂ O, K ₂ O, and Li ₂ O are oxides that serve as network modifiers that form non-crosslinking bonds within the glass composition. These components cannot be vitrified alone, but vitrification becomes possible when mixed with a network former such as SiO ₂ and B ₂ O ₃ in a certain ratio. If only one of the above components is included in the glass composition, the durability of the glass may be weakened within the region where vitrification is possible. However, when two or more components are included in the glass composition, the durability of the glass may improve again depending on the ratio. This is called the mixed alkali effect. Therefore, alkali oxides such as Na ₂ O, K ₂ O, and Li ₂ O improve antibacterial activity by taking advantage of the fact that they first occupy modified oxide sites in glass.

Alkaline earth oxides such as CaO and MgO are basically oxides that function as non-crosslinking modified oxides in glass. Vitrification is impossible alone, but vitrification becomes possible when mixed with a network former such as SiO ₂ and B ₂ O ₃ in a certain ratio. Unlike alkali oxides, alkaline earth oxides such as CaO and MgO have a +2 charge and must be replaced with two water molecule ions, making ion exchange relatively difficult, so they are sometimes used as durability enhancing elements. . Therefore, alkaline earth oxides such as CaO and MgO are durable among modified oxides, and alkali oxides that indirectly contribute structurally to developing water-insoluble and antibacterial properties by occupying modified oxide sites and Used for the same purpose.

ZnO is a component that performs both the role of a network-forming oxide and a modified oxide by replacing and covalently bonding with a part of the network-forming oxide. In addition, ZnO is an ingredient that greatly contributes to the antibacterial effect. ZnO is an intermediate oxide, and in order to participate in the network-forming structure in glass, its atomic radius must be small and its electronegativity must be large, so the difference with oxygen must be small. These intermediate oxides have a larger atomic radius than the typical network-forming oxides Si, P, and B, and their low electronegativity makes it difficult to form glass on their own. However, in situations where the network-forming oxide is present, it substitutes for the network-forming oxide and plays its role. It refers to the ingredients. Below a certain content, ZnO acts only as a modified oxide, but above a certain content, it forms covalent bonds, drastically improving durability. Here, the certain content is determined by the content of the network-forming oxide and the modifying oxide.

Eluable glass composition (composition A)

The soluble glass composition (composition A) according to the present invention contains 40 to 70% by weight of SiO ₂ ; 5 to 20% by weight of one or more of Na ₂ O, K ₂ O and Li ₂ O; CaO 10-45% by weight; and 10 to 40% by weight of MgO, and the total weight% of the components of the soluble glass composition is 100% by weight.

With respect to the total weight of the soluble glass composition (composition A) according to the present invention, the content of SiO ₂ is preferably 40 to 70% by weight. If the content of SiO ₂ in Composition A is less than 40% by weight, the network-forming oxide is insufficient and the glass leaves the vitrification region, and a heterogeneity phenomenon in which opalized glass and transparent glass coexist may occur. If the content of SiO ₂ in composition A is more than 70% by weight, vitrification is strong, but alkaline ion elution characteristics are lowered and the pH raising effect is lowered, which may ultimately cause a problem in that antibacterial properties are lowered.

With respect to the total weight of the soluble glass composition (composition A) according to the present invention, the sum of one or more of Na ₂ O, K ₂ O and Li ₂ O is preferably 5 to 20% by weight. If the sum of one or more of Na ₂ O, K ₂ O and Li ₂ O in composition A is less than 5% by weight, non-melting may occur and vitrification may become difficult, and if it is more than 20% by weight, water resistance is extreme. This can cause problems as moisture sticks to the antibacterial ingredient and a hydration layer is formed, causing performance to deteriorate in a short period of time.

Based on the total weight of the soluble glass composition (composition A) according to the present invention, the CaO content is preferably 10 to 45% by weight. If the CaO content in composition A is less than 10% by weight, Ca ions may not be eluted sufficiently to sufficiently increase the pH, which may reduce the antibacterial properties. If it is more than 45% by weight, alkaline earth, a substance that dissolves at high temperatures, may deteriorate. Because it is not sufficiently melted, a phenomenon in which unmelted material is formed beyond the vitrification area may occur, which may be a problem.

Based on the total weight of the soluble glass composition (composition A) according to the present invention, the MgO content is preferably 10 to 40% by weight. If the MgO content in composition A is less than 10% by weight, Mg ions may not be eluted enough to sufficiently increase the pH, which may reduce the antibacterial properties. If it is more than 40% by weight, alkaline earth, a substance that dissolves at high temperatures, may be present. Because it is not sufficiently melted, a phenomenon in which unmelted material is formed beyond the vitrification area may occur, which may be a problem.

On the other hand, in the soluble glass composition (composition A), if the sum of the contents of CaO and MgO is less than 30% by weight, a problem may occur in which the pH cannot be raised sufficiently to exert antibacterial activity, and the CaO content may be If the MgO content is less than that, there may be a problem in that the vitrification performance cannot be strengthened.

Therefore, in order for the dissolvable glass composition to exhibit excellent antibacterial activity and enhance vitrification performance, it is preferable that the sum of the contents of CaO and MgO in composition A is 30% by weight or more, and the content of CaO is greater than the content of MgO.

Non-elutable glass composition (composition B)

The non-elutable glass composition (composition B) according to the present invention contains 26 to 45% by weight of SiO ₂ ; 0.5 to 4% by weight of one or more of B ₂ O ₃ and P ₂ O ₅ ; 15 to 25% by weight of one or more of Na ₂ O and K ₂ O; CaO 3-10% by weight; and 25 to 45% by weight of ZnO, and the total weight% of the components of the non-eludable glass composition is 100% by weight.

With respect to the total weight of the non-elutable glass composition (composition B) according to the present invention, the content of SiO ₂ is preferably 26 to 45% by weight. If the content of SiO ₂ in composition B is less than 26% by weight, the network-forming oxide is insufficient and the glass leaves the vitrification region, and a heterogeneity phenomenon in which opalized glass and transparent glass coexist may occur. If the content of SiO ₂ in composition B exceeds 45% by weight, vitrification is strong, but alkaline ion elution characteristics are lowered and the pH raising effect is lowered, which may ultimately lead to a problem in that antibacterial properties are lowered.

With respect to the total weight of the non-elutable glass composition (composition B) according to the present invention, the sum of one or more of B ₂ O ₃ and P ₂ O ₅ is preferably 0.5 to 4% by weight. In composition B, if the sum of one or more of B ₂ O ₃ and P ₂ O ₅ is less than 0.5% by weight, non-melting may occur and vitrification may become difficult, and if it is more than 4% by weight, it may be difficult to vitrify within the network-forming structure. There may be a problem of reduced water resistance due to the structural properties of B and P and/or the properties of the elements themselves.

With respect to the total weight of the non-elutable glass composition (composition B) according to the present invention, the sum of one or more of Na ₂ O and K ₂ O is preferably 15 to 25% by weight. In composition B, if the sum of one or more of Na ₂ O and K ₂ O is less than 15% by weight, non-melting phenomenon may occur and vitrification may become difficult, and if it exceeds 25% by weight, it may affect the basic elution mechanism of glass. Accordingly, there may be a problem in that alkaline ions are easily replaced with H ₃ O ⁺ ions of water and water resistance is reduced, which intensifies dissolution.

Based on the total weight of the non-elutable glass composition (composition B) according to the present invention, the CaO content is preferably 3 to 10% by weight. If the CaO content in composition B is less than 3% by weight, the structure cannot be strengthened at the modified oxide site, so alkali elution cannot be controlled, which may lead to a problem in that water resistance is lowered. If the CaO content in composition B exceeds 10% by weight, alkaline earth, a substance that melts at high temperatures, cannot be sufficiently melted, which may cause a problem in that unmelted substances are formed beyond the vitrification zone.

With respect to the total weight of the non-elutable glass composition (composition B) according to the present invention, the ZnO content is preferably 25 to 45% by weight. If the ZnO content in composition B is less than 25% by weight, there is a problem in that sufficient antibacterial activity cannot be achieved because the absolute amount of the substance that exhibits antibacterial performance is insufficient. If the ZnO content in composition B exceeds 45% by weight, ZnO may not exist homogeneously in the glass composition and may partially form crystals and escape the vitrification area, resulting in heterogeneity where whitened glass and transparent glass coexist. This phenomenon may occur and cause problems.

On the other hand, in the non-elutable glass composition (composition B), when the content of SiO ₂ is less than the content of B ₂ O ₃ or the content of ZnO is less than the sum of the contents of Na ₂ O, K ₂ O and CaO , problems may arise in which the non-discharge characteristics are not exercised. If the sum of the contents of Na ₂ O, K ₂ O and CaO is less than 20% by weight, vitrification may not proceed.

Therefore, in the non-elutable glass composition, the content of SiO ₂ is greater than the content of B ₂ O ₃ , the content of ZnO is greater than the sum of the contents of Na ₂ O, K ₂ O and CaO, and Na ₂ O and K ₂ The sum of the O and CaO contents is preferably 20% by weight or more.

Hereinafter, the method for producing the antibacterial composite glass composition according to the present invention will be described in detail.

<Method for producing antibacterial composite glass composition>

The method for producing an antibacterial composite glass composition according to the present invention includes providing materials for the above-described eluable glass composition (composition A) and the non-elutable glass composition (composition B); Melting the composition A and composition B at a temperature range of 1000 to 1300° C. for 10 to 60 minutes, respectively; Cooling the molten composition A and composition B, respectively, to obtain cullets of composition A and cullets of composition B; Grinding the cullet of composition A and the cullet of composition B, respectively, to form composition A glass powder and composition B glass powder; and mixing the composition A glass powder and the composition B glass powder.

Hereinafter, an antibacterial resin mixture composition containing an antibacterial composite glass composition and a plastic resin according to the present invention will be described.

<Antibacterial resin mixture composition>

The antibacterial composite glass composition according to the present invention can be applied as an additive to injection molded plastic resin. By including an appropriate amount of the antibacterial composite glass composition according to the present invention in an injection-molded plastic resin product, antibacterial activity can be imparted to the injection-molded product.

Therefore, an antibacterial resin mixed composition can be obtained by mixing the antibacterial composite glass composition according to the present invention with a plastic resin.

Since the antibacterial resin mixed composition according to the present invention includes an antibacterial composite glass composition with antibacterial and antibiofilm properties, when used as a material when manufacturing home appliances, etc., it provides excellent antibacterial properties and a biofilm reduction rate in home appliances. It can be performed.

The plastic resin of the antibacterial resin mixture composition according to the present invention can be used without limitation as long as it is a plastic resin for manufacturing home appliances, etc., and can therefore be applied to various home appliances. For example, it may be a plastic resin containing polypropylene (PP).

The antibacterial resin mixture composition according to the present invention preferably contains 3 to 10 parts by weight of the antibacterial composite glass composition based on 100 parts by weight of the plastic resin. If the content of the antibacterial composite glass composition is less than 3 parts by weight, the anti-biofilm performance may not be sufficiently demonstrated, and if it is more than 10 parts by weight, a problem may occur in which moldability is reduced when applied as an injection molded product to home appliances, etc. there is.

The antibacterial resin mixture composition according to the present invention has an antibacterial activity of more than 99% against one or more types of Escherichia coli, Staphylococcus aureus, Klebsiella pneumoniae, and Pseudomonas aeruginosa, and has a biofilm reduction rate of more than 90%, which is a highly contaminated area, and thus has antibacterial and antibacterial properties. Biofilm properties can be excellently demonstrated.

Hereinafter, the configuration and operation of the present invention will be described in more detail through preferred embodiments of the present invention. However, this is presented as a preferred example of the present invention and should not be construed as limiting the present invention in any way.

Contents not described here can be sufficiently inferred technically by a person skilled in the art, so description thereof will be omitted.

<Preparation example: Preparation of composition A and composition B>

An antibacterial composite glass composition having the composition and content shown in Tables 1 and 2 below was prepared. The raw materials for Composition A and Composition B were separately mixed to prepare Composition A and Composition B, respectively.

Specifically, each of the mixed raw materials to prepare Composition A and Composition B was sufficiently melted in an electric furnace at a temperature of 1200°C for 30 minutes, cooled by air cooling on a stainless steel plate, and then rolled into twin rolls. Using -roll), cullet of composition A and cullet of composition B were obtained, respectively. The cullet of composition A and the cullet of composition B were each ground in a dry grinder (ball mill) and then passed through a 400 mesh sieve to produce 'composition A glass powder' and 'D50 average particle diameter of 10 μm. Composition B glass powder' was obtained, respectively.

Composition A
(eluusable glass composition) ingredient Content (% by weight) SiO ₂ 42.5 Na ₂ O 11.2 _K2O 3.7 Li ₂ O 2.9 CaO 27.3 MgO 12.4 total 100

Composition B
(Non-eludable glass composition) ingredient Content (% by weight) SiO ₂ 33.5 B ₂ O ₃ 3.2 P ₂ O ₅ 0.4 Na ₂ O 17.5 _K2O 6.7 CaO 6.1 ZnO 32.6 total 100

<Example 1>

The 'Composition A glass powder' and the 'Composition B glass powder' prepared in the above Preparation Example were mixed in a ratio of 10:90 to prepare an antibacterial composite glass composition powder. With respect to 100 parts by weight of polypropylene resin, 4 parts by weight of the antibacterial composite glass composition powder prepared above was added to obtain a polypropylene antibacterial resin mixed composition.

The polypropylene antibacterial resin mixture composition was manufactured into an injection molded product with a size of 200 (mm) × 100 (mm) and a thickness of 3 (mm).

<Example 2 and Comparative Examples 1 to 2>

Injection products of Example 1 and Comparative Examples 1 and 2 were manufactured in the same manner as in Example 1, but with different ratios of Composition A and Composition B as shown in Table 3 below.

Example 1 Example 2 Comparative Example 1 Comparative Example 2 Composition A (% by weight) 10 30 100 0 Composition B (% by weight) 90 70 0 100 Total (weight%) 100 100 100 100

<Experimental example: Evaluation of antibacterial activity and anti-biofilm properties>

For the injection molded products manufactured through Examples 1 to 2 and Comparative Examples 1 to 2 according to the present invention, the antibacterial activity value against Escherichia coli, Staphylococcus aureus, Klebsiella pneumoniae, and Pseudomonas aeruginosa was determined through an antibacterial standard test (JIS Z 2801, film attachment method). evaluated. The results are shown in Table 4 below. In general, if the antibacterial activity is 99% (2.0 or more when converted to antibacterial activity value), it is evaluated that the antibacterial properties are demonstrated.

The injection products manufactured through Examples 1 to 2 and Comparative Examples 1 to 2 according to the present invention were evaluated using the standard test method ASTM E2562-12 using Pseudomonas aeruginosa to confirm the anti-biofilm effect. The results are shown in Table 4 below. In general, when the biofilm reduction rate is 90% or more, anti-biofilm performance is evaluated to be demonstrated.

Example 1 Example 2 Comparative Example 1 Comparative example 2 port
fungus
power E. coli (%) 99.99 99.99 99.9 99.99 Staphylococcus aureus (%) 99.99 99.99 99.9 99.99 Klebsiella pneumoniae (%) 99.99 99.99 99.99 99.99 Pseudomonas aeruginosa (%) 99.99 99.99 99 99.9 Biofilm reduction rate (%)
(Pseudomonas aeruginosa) 94 99 70 32

As can be seen from Table 4, it was confirmed that the Examples according to the present invention were superior to the Comparative Examples in both antibacterial and anti-biofilm properties against microorganisms.

Although the present invention has been described as above, it is obvious that the present invention is not limited to the embodiments disclosed herein, and that various modifications can be made by those skilled in the art within the scope of the technical idea of the present invention. In addition, although the operational effects according to the configuration of the present invention were not explicitly described and explained in the above description of the embodiments of the present invention, it is natural that the predictable effects due to the configuration should also be recognized.

Claims (12)

Includes an eluable glass composition and a non-elutable glass composition,
The elutable glass composition and the non-elutable glass composition are mixed at a weight ratio of 10:90 to 30:70,
The soluble glass composition contains 40 to 70% by weight of SiO ₂ ; 5 to 20% by weight of one or more of Na ₂ O, K ₂ O and Li ₂ O; CaO 10-45% by weight; and 10 to 40% by weight of MgO, and the total weight% of the components of the soluble glass composition is 100% by weight,
The non-elutable glass composition contains 26 to 45% by weight of SiO ₂ ; 0.5 to 4% by weight of one or more of B ₂ O ₃ and P ₂ O ₅ ; 15 to 25% by weight of one or more of Na ₂ O and K ₂ O; CaO 3-10% by weight; and 25 to 45% by weight of ZnO, wherein the sum of the weight% of the components of the non-eludable glass composition is 100% by weight.
Antibacterial composite glass composition.
delete According to paragraph 1,
In the soluble glass composition,
The sum of the contents of CaO and MgO is 30% by weight or more,
Characterized in that the content of CaO is greater than the content of MgO,
Antibacterial composite glass composition.
According to paragraph 1,
In the non-eludable glass composition,
The content of SiO ₂ is greater than the content of B ₂ O ₃ ,
The content of ZnO is greater than the sum of the contents of Na ₂ O, K ₂ O and CaO,
Characterized in that the sum of the contents of Na ₂ O, K ₂ O and CaO is 20% by weight or more,
Antibacterial composite glass composition.
An antibacterial composite glass composition obtained by mixing an elutable glass composition and a non-elutable glass composition at a weight ratio of 10:90 to 30:70; and
Contains plastic resin;
The soluble glass composition contains 40 to 70% by weight of SiO ₂ ; 5 to 20% by weight of one or more of Na ₂ O, K ₂ O and Li ₂ O; CaO 10-45% by weight; and 10 to 40% by weight of MgO, and the total weight% of the components of the soluble glass composition is 100% by weight,
The non-elutable glass composition contains 26 to 45% by weight of SiO ₂ ; 0.5 to 4% by weight of one or more of B ₂ O ₃ and P ₂ O ₅ ; 15 to 25% by weight of one or more of Na ₂ O and K ₂ O; CaO 3-10% by weight; and 25 to 45% by weight of ZnO, wherein the sum of the weight% of the components of the non-eludable glass composition is 100% by weight.
Antibacterial resin mixture composition.
delete According to clause 5,
In the soluble glass composition,
The sum of the contents of CaO and MgO is 30% by weight or more,
The content of CaO is greater than that of MgO,
In the non-eludable glass composition,
The content of SiO ₂ is greater than the content of B ₂ O ₃ ,
The content of ZnO is more than the sum of the contents of Na ₂ O, K ₂ O and CaO,
Characterized in that the sum of the contents of Na ₂ O, K ₂ O and CaO is 20% by weight or more,
Antibacterial resin mixture composition.
According to clause 5,
Characterized in that it contains 3 to 10 parts by weight of the antibacterial composite glass composition based on 100 parts by weight of the plastic resin.
Antibacterial resin mixture composition.
According to clause 5,
The plastic resin is characterized in that it contains polypropylene (PP),
Antibacterial resin mixture composition.
According to clause 5,
The antibacterial composite glass composition is characterized in that it is in powder form with a D50 average particle size of 5 to 15 μm,
Antibacterial resin mixture composition.
According to clause 5,
The antibacterial activity against one or more of Escherichia coli , Staphylococcus aureus , Klebsiella pneumoniae , and Pseudomonas aeruginosa is over 99%,
Characterized by a biofilm reduction rate of 90% or more,
Antibacterial resin mixture composition.
A home appliance to which the antibacterial resin mixture composition of any one of claims 5 and 7 to 11 is applied.