KR102577827B1 - Airtight container with excellent antibacterial and antifungal properties, and manufacturing method thereof - Google Patents

Abstract

The present invention provides a hygienic sealed container with excellent antibacterial and antifungal properties comprising polyolefin resin, ethylene-propylene-diene rubber, surface-modified zinc oxide nanoparticles, surface-modified zeolite, surface-modified fired shell powder, and anti-fog agent, and It relates to its manufacturing method.

Description

Hygienic airtight container with excellent antibacterial and antifungal properties, and manufacturing method thereof {Airtight container with excellent antibacterial and antifungal properties, and manufacturing method thereof}

The present invention relates to a sanitary sealed container with excellent antibacterial and anti-fungal properties and a method of manufacturing the same.

Recently, as awareness of microorganisms has increased due to consumer well-being trends and high hygiene standards, research has been actively conducted to provide antibacterial functions to plastic containers made of synthetic resins, and as an antibacterial material, it is said to have the best antibacterial effect on the planet. Known silver-based inorganic antibacterial agents are mainly used.

However, silver-based inorganic antibacterial agents with excellent antibacterial efficacy have the disadvantage of severely discoloring the color of synthetic resins or containers, and have excellent antibacterial effects against bacteria but weak sterilization effects against fungi.

Therefore, there is a need to develop sanitary sealed containers that have excellent antibacterial and anti-fungal effects while preventing the color of the sealed container from changing.

Meanwhile, Republic of Korea Patent Publication No. 10-2011-0014001 is presented as a similar prior document regarding this.

Republic of Korea Patent Publication No. 10-2011-0014001 (2011.02.10)

In order to solve the above problems, the purpose of the present invention is to provide a hygienic sealed container with excellent antibacterial and antifungal effects while not easily changing the color of the container, and a method for manufacturing the same.

However, the above object is illustrative, and the technical idea of the present invention is not limited thereto.

One aspect of the present invention for achieving the above object is an antibacterial and This relates to a hygienic sealed container with excellent anti-mold properties.

In one aspect, the surface-modified zinc oxide nanoparticles, the surface-modified zeolite, and the surface-modified fired shell powder may be surface-modified with silicone oil, and in this case, the silicone oil is HLB 3 to 8. Specific examples include dimethicone, PEG-3 dimethicone, PEG-10 dimethicone, PEG/PPG-20/22 butyl ether dimethicone, cetyl PEG/PPG-10/1 dimethicone, and PEG-9 polydimethyl. It may be any one or two or more selected from the group consisting of siloxyethyl dimethicone, lauryl PEG-9 polydimethylsiloxyethyl dimethicone, etc.

In the above aspect, the polyolefin resin may be any one or two or more selected from the group consisting of propylene homopolymer, ethylene-propylene copolymer, and ethylene-propylene-hexene terpolymer.

In the above aspect, the ethylene-propylene-diene rubber may be ethylene-propylene-ethylidenenorbornene rubber, and the ethylene-propylene-ethylidenenorbornene rubber includes 60 to 80% by weight of ethylene monomer and 15% by weight of propylene monomer. It may contain from 30% by weight to 30% by weight and from 3 to 10% by weight of ethylidenenorbornene.

In the above aspect, the antifogging agent may be any one or two or more selected from the group consisting of sorbitan fatty acid ester, glycerin fatty acid ester, polyglycerin fatty acid ester, etc.

In addition, another aspect of the present invention is a) mixing polyolefin resin chips, surface-modified zinc oxide nanoparticles, surface-modified zeolite, surface-modified fired shell powder, and anti-fogging agent, and then extruding to produce masterbatch pellets. ; and b) mixing the masterbatch pellets, polyolefin resin chips, and ethylene-propylene-diene rubber and then injection molding to manufacture a sanitary sealed container. A method of manufacturing a sanitary sealed container with excellent antibacterial and anti-fungal properties, including It's about.

The sanitary sealed container according to the present invention contains polyolefin resin, ethylene-propylene-diene rubber, surface-modified zinc oxide nanoparticles, surface-modified zeolite, surface-modified fired shell powder, and anti-fog agent, thereby providing excellent antibacterial performance and anti-fogging agent. All mold performance can be secured, the impact resistance is excellent, and since silver-based inorganic antibacterial agents are not used, the container may not easily discolor.

Figure 1 is a sample photograph of the white translucent sanitary sealed container manufactured in Example 1.
Figure 2 is a sample photograph of the orange sanitary sealed container manufactured in Example 10.
Figure 3 shows the antibacterial test results of the sanitary sealed container sample prepared in Example 1.
Figure 4 shows the anti-fungal test results of the sanitary sealed container sample prepared in Example 1.

Hereinafter, a hygienic sealed container with excellent antibacterial and anti-fungal properties according to the present invention and its manufacturing method will be described in detail. The drawings introduced below are provided as examples so that the idea of the present invention can be sufficiently conveyed to those skilled in the art. Accordingly, the present invention is not limited to the drawings presented below and may be embodied in other forms, and the drawings presented below may be exaggerated to clarify the spirit of the present invention. At this time, if there is no other definition in the technical and scientific terms used, they have the meaning commonly understood by those skilled in the art to which this invention pertains, and the gist of the present invention is summarized in the following description and attached drawings. Descriptions of known functions and configurations that may be unnecessarily obscure are omitted.

One aspect of the present invention relates to a sanitary sealed container containing polyolefin resin, ethylene-propylene-diene rubber, surface-modified zinc oxide nanoparticles, surface-modified zeolite, surface-modified fired shell powder, and anti-fogging agent.

As such, the sanitary sealed container according to the present invention has excellent antibacterial performance as it contains polyolefin resin, ethylene-propylene-diene rubber, surface-modified zinc oxide nanoparticles, surface-modified zeolite, surface-modified fired shell powder, and anti-fog agent. It can secure both anti-fungal and anti-fungal performance, has excellent impact resistance, and does not use silver-based inorganic antibacterial agents, so the container may not easily discolor.

Hereinafter, each component of the sanitary sealed container according to an example of the present invention will be described in more detail.

In one example of the present invention, the polyolefin resin is a base component of a sanitary sealed container, and any resin commonly used in the industry can be used without particular limitation. Specifically, for example, it may be any one or two or more selected from the group consisting of propylene homopolymer, ethylene-propylene copolymer, and ethylene-propylene-hexene terpolymer, and preferably ethylene-propylene copolymer can be used. The ethylene-propylene copolymer may be obtained by randomly polymerizing the main component propylene monomer and some ethylene monomers, for example, 1 to 10% by weight of ethylene monomer and the remaining amount of propylene monomer. In this range, impact resistance and heat resistance can be excellent. As a more specific example, the ethylene-propylene copolymer may have a weight average molecular weight of 80,000 to 500,000 g/mol, more preferably 100,000 to 300,000 g/mol, and a melt index (MI, D1238 standard) of 10 to 30 g/mol. It is preferable to use 10 min and a density (based on D1505) of 0.90 to 0.95 g/cm3 to ensure excellent impact resistance and processability.

In one example of the present invention, the ethylene-propylene-diene (EPDM) rubber is used to improve the impact resistance of sanitary sealed containers, and is preferably ethylene-propylene-ethylidene norbornene rubber. By adding this, the target impact resistance properties can be achieved. As a more specific example, the ethylene-propylene-ethylidenenorbornene rubber may include 60 to 80% by weight of ethylene monomer, 15 to 30% by weight of propylene monomer, and 3 to 10% by weight of ethylidenenorbornene. When added to the polyolefin resin in an appropriate amount, an impact strength of 200 J/m or more can be achieved.

The EPDM rubber may be added in an amount of 1 to 10 parts by weight, more preferably 3 to 5 parts by weight, based on 100 parts by weight of the polyolefin resin. In the above range, the impact resistance improvement effect is excellent. On the other hand, when EPDM rubber is added in less than 1 part by weight, the effect of improving impact resistance may not be sufficient, and if it is added in more than 10 parts by weight, heat resistance may be reduced.

In one example of the present invention, the surface-modified zinc oxide nanoparticles, surface-modified zeolite, and surface-modified fired shell powder are used to impart antibacterial properties and anti-fungal properties to sanitary sealed containers, and use them in combination to provide antibacterial properties. Both properties and anti-fungal properties can be secured.

As a specific example, the surface-modified zinc oxide nanoparticles, surface-modified zeolite, and surface-modified fired shell powder may be surface-modified with silicone oil. Through this, agglomeration between particles is prevented, and excellent antibacterial and anti-fungal properties can be secured even by adding a small amount of the above ingredients, and can be well mixed with polyolefin resin and EPDM rubber. On the other hand, if the surface is not modified with silicone oil, the above ingredients must be added twice or more to secure similar antibacterial and antifungal properties, which is not good because the impact resistance of the sanitary sealed container may be reduced.

Meanwhile, the above components may be surface modified with silicone oil having an HLB of 3 to 8, and preferably, may be surface modified with a silicone oil having an HLB of 4 to 7. Through this, the agglomeration phenomenon between particles can be prevented particularly effectively, while miscibility with polyolefin resin and EPDM rubber can be excellent. On the other hand, when using silicone oil with HLB less than 3 or more than HLB 8, the miscibility between particles and polyolefin resin after surface modification is poor, which may worsen the agglomeration phenomenon between particles, which not only reduces antibacterial and anti-fungal properties. Impact strength may be lowered.

As a specific example, the silicone oil is dimethicone, PEG-3 dimethicone, PEG-10 dimethicone, PEG/PPG-20/22 butyl ether dimethicone, cetyl PEG/PPG-10/1 dimethicone, PEG-9 It may be any one or two or more selected from the group consisting of polydimethylsiloxyethyl dimethicone, lauryl PEG-9 polydimethylsiloxyethyl dimethicone, etc., and the surface-modified zinc oxide nanoparticles, the surface-modified zeolite, and The surface-modified fired shell powder can be surface-modified with the same or different types of silocone oil.

Additionally, the viscosity of the silicone oil at 25°C may be 100 to 1000 cS, and more preferably 400 to 800 cS. In this range, the surface modification effect of the particle components may be excellent.

Meanwhile, in the surface-modified zinc oxide nanoparticles according to an example of the present invention, the zinc oxide nanoparticles before surface modification may be nano-sized zinc oxide particles with an average particle size of 1 to 100 nm, more preferably 5 to 50 nm. there is. In this range, it has excellent antibacterial and anti-fungal performance and can be mixed well with polyolefin resin.

The surface-modified zinc oxide nanoparticles may be added in an amount of 0.1 to 2 parts by weight, more preferably 0.3 to 1 part by weight, based on 100 parts by weight of the polyolefin resin. In the above range, antibacterial and antifungal properties are excellent. On the other hand, when surface-modified zinc oxide nanoparticles are added in less than 0.1 parts by weight, antibacterial properties may be minimal, and when added in more than 2 parts by weight, there is a disadvantage in that haze increases.

In the surface-modified zeolite according to an example of the present invention, the zeolite before surface modification may be nano-level zeolite particles with an average particle size of 0.1 to 3 ㎛, more preferably 0.5 to 1 ㎛. In this range, it has excellent antibacterial and anti-fungal performance and can be mixed well with polyolefin resin. Additionally, any type of zeolite may be used, and may be natural zeolite, synthetic zeolite, or a mixture thereof, but it is better to use natural zeolite in terms of low cost.

The surface-modified zeolite may be added in an amount of 0.05 to 1 part by weight, more preferably 0.1 to 0.5 parts by weight, based on 100 parts by weight of the polyolefin resin. In the above range, deodorizing and antibacterial and anti-mold properties are excellent.

In the surface-modified fired shell powder according to an example of the present invention, the fired shell powder before surface modification may have an average particle size of 0.1 to 10 ㎛, more preferably 0.5 to 3 ㎛. In this range, it has excellent antibacterial and anti-fungal performance and can be mixed well with polyolefin resin. At this time, the calcined shell powder may be obtained by calcining shells at 900 to 1250°C for 1 to 10 hours, and more preferably, it may be calcined at 1000 to 1200°C for 3 to 5 hours. Through this, problems such as decay caused by organic matter remaining in the shell can be prevented without consuming too much energy in the firing of the shell. Afterwards, through several stages of grinding, it is possible to obtain calcined shell powder that satisfies the above particle size range.

The surface-modified fired shell powder may be added in an amount of 0.1 to 3 parts by weight, more preferably 0.5 to 1.5 parts by weight, based on 100 parts by weight of the polyolefin resin. In the above range, deodorizing and antibacterial and anti-mold properties are excellent.

In one example of the present invention, the anti-fog agent is used to prevent water droplets from forming by forming a thin anti-fog film on the surface of the sealed container. By adding it, it improves the humid environment in which mold grows easily and maintains the freshness of the contents for a longer period of time. It can be maintained for a while. As a specific example, the antifogging agent may be any one or two or more selected from the group consisting of sorbitan fatty acid ester, glycerin fatty acid ester, and polyglycerin fatty acid ester.

The anti-fogging agent may be included in an amount of 0.1 to 10 parts by weight, more preferably 0.5 to 5 parts by weight, based on 100 parts by weight of the polyolefin resin. In this range, the anti-fogging effect can be excellent.

In addition, the sanitary sealed container according to an example of the present invention may further include functional additives as needed. Specifically, for example, it may further include any one or two or more selected from the group consisting of colorants, heat stabilizers, antioxidants, and ultraviolet absorbers, and the amount of these additions may be determined according to typical levels.

Such sanitary sealed containers can be used as food containers such as kimchi containers and side dish containers.

In addition, another aspect of the present invention is a) mixing polyolefin resin chips, surface-modified zinc oxide nanoparticles, surface-modified zeolite, surface-modified fired shell powder, and anti-fogging agent, and then extruding to produce masterbatch pellets. ; and b) mixing the masterbatch pellets, polyolefin resin chips, and ethylene-propylene-diene rubber and then injection molding to manufacture a sanitary sealed container. A method of manufacturing a sanitary sealed container with excellent antibacterial and anti-fungal properties, including Regarding this, since the specific types and contents of each component are the same as described above, redundant description will be omitted, and a more detailed manufacturing process will be explained through manufacturing examples and examples described later. However, extrusion and injection molding are performed by conventional methods. It can be performed accordingly.

Hereinafter, the sanitary sealed container with excellent antibacterial and antifungal properties according to the present invention and its manufacturing method will be described in more detail through examples. However, the following examples are only a reference for explaining the present invention in detail, and the present invention is not limited thereto, and may be implemented in various forms.

Additionally, unless otherwise defined, all technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention pertains. The terminology used in the description herein is merely to effectively describe particular embodiments and is not intended to limit the invention. Additionally, the unit of additives not specifically described in the specification may be weight percent.

[Production Example 1]

For 100 parts by weight of zinc oxide nanoparticles (average particle size 50 nm), 20 parts by weight of PEG-10 dimethicone (BRB 6341, viscosity 600 cS at 25°C, HLB 4.5) was added, and the mixture was mixed at a speed of 800 rpm using a super mixer. After stirring, filtering and drying were performed to prepare surface-modified zinc oxide nanoparticles.

[Production Example 2]

For 100 parts by weight of natural zeolite (average particle size 1 ㎛), 20 parts by weight of PEG-10 dimethicone (BRB 6341, viscosity 600 cS at 25℃, HLB 4.5) was added and stirred at a speed of 800 rpm using a super mixer. Afterwards, the surface-modified zeolite was prepared by filtering and drying.

[Production Example 3]

The scallop shells were fired at a temperature of 1100°C for 3 hours, then placed in a multi-purpose grinder and first pulverized to have an average particle diameter of 100 ㎛. The primary crushed scallop shells were fired again at a temperature of 1100°C for 2 hours, and then secondary crushed to an average particle diameter of 2 ㎛ through a dry ball mill process to prepare fired shell powder.

Next, 20 parts by weight of PEG-10 dimethicone (BRB 6341, viscosity 600 cS at 25°C, HLB 4.5) was added to 100 parts by weight of the calcined shell powder, and stirred at a speed of 800 rpm using a super mixer. Afterwards, surface-modified calcined shell powder was prepared by filtering and drying.

[Production Examples 4 to 6]

Except for using cyclopentasiloxane and PEG/PPG-18/18 dimethicone (BRB 6373, viscosity 30 cS at 25°C, HLB 2) as silicone oil, all processes were carried out in the same manner as in Preparation Examples 1 to 3 to produce a surface-modified product. Zinc oxide nanoparticles (Preparation Example 4), surface-modified zeolite (Preparation Example 5), and surface-modified calcined shell powder (Preparation Example 6) were prepared.

[Production Examples 7 to 9]

Except for using PEG-12 dimethicone (SM3220P, viscosity 250-600 cS at 25°C, HLB 13) as silicone oil, all processes were carried out in the same manner as in Preparation Examples 1 to 3 to produce surface-modified zinc oxide nanoparticles (Preparation Example 7), surface-modified zeolite (Preparation Example 8) and surface-modified calcined shell powder (Preparation Example 9) were prepared.

[Comparative Manufacturing Examples 1 to 3]

Zinc oxide nanoparticles without surface modification (Comparative Preparation Example 1), zeolite (Comparative Preparation Example 2), and calcined shell powder (Comparative Preparation Example 3) were prepared.

[Example 1]

Based on 20 parts by weight of ethylene-propylene random copolymer chip (EP-RP, RJ570Z, Hanwha Total), 0.6 parts by weight of the surface-modified zinc oxide nanoparticles of Preparation Example 1 and 0.2 parts by weight of the surface-modified zeolite of Preparation Example 2. and 0.8 parts by weight of the surface-modified fired shell powder were mixed and then extruded and cut to prepare masterbatch pellets.

Next, 3.5 parts by weight of the masterbatch pellet and ethylene-propylene-ethylidenenorbornene rubber (EPDM rubber, KEP570P, Kumho Polychem) are added to 80 parts by weight of ethylene-propylene random copolymer chip (RJ570Z, Hanwha Total). After mixing the parts, injection molding was performed to prepare a sanitary sealed container sample as shown in Figure 1.

[Examples 2 to 3 and Comparative Examples 1 to 4]

As shown in Table 1 below, all processes were carried out in the same manner as in Example 1, except that the types and amounts of added ingredients were different. At this time, Table 1 below shows the content (parts by weight, phr) of each component based on the sanitary sealed container sample.

(phr) Example Comparative example One 2 3 One 2 3 4 5 EP-RP 100 (Left East) (Left East) (Left East) (Left East) (Left East) (Left East) (Left East) EPDM 3.5 (Left East) (Left East) (Left East) (Left East) (Left East) (Left East) - Manufacturing Example 1 0.6 - - - 0.6 0.6 - 0.6 Production example 2 0.2 - - - 0.2 - 0.2 0.2 Production example 3 0.8 - - - - 0.8 0.8 0.8 Production example 4 - 0.6 - - - - - - Production example 5 - 0.2 - - - - - - Production example 6 - 0.8 - - - - - - Production example 7 - - 0.6 - - - - - Production example 8 - - 0.2 - - - - - Production example 9 - - 0.8 - - - - - Comparative Manufacturing Example 1 - - - 0.6 - - - - Comparative Manufacturing Example 2 - - - 0.2 - - - - Comparative Manufacturing Example 3 - - - 0.8 - - - -

[Examples 4 to 9]

All processes other than varying the contents (parts by weight, phr) of the surface-modified zinc oxide nanoparticles, surface-modified zeolite, and surface-modified fired shell powder prepared in Preparation Examples 1 to 3, respectively, as shown in Table 1 below. Proceeded in the same manner as Example 1 above.

(phr) Example One 4 5 6 7 8 9 EP-RP 100 (Left East) (Left East) (Left East) (Left East) (Left East) (Left East) EPDM 3.5 (Left East) (Left East) (Left East) (Left East) (Left East) (Left East) Manufacturing Example 1 0.6 0.01 0.1 0.3 One 2 5 Production example 2 0.2 0.01 0.05 0.1 0.5 One 3 Production example 3 0.8 0.01 0.1 0.5 1.5 3 5

[Example 10]

Proceeding in the same manner as in Example 1, 5 parts by weight of an orange-based colorant was added to the masterbatch composition to prepare an orange-colored sanitary sealed container sample as shown in FIG. 2.

[Characteristics Evaluation]

1) Antibacterial property: Antibacterial property was evaluated according to JIS Z 2801:2010. In detail, Escherichia coli ATCC 8739 was inoculated at ^1.5 Confirmed. At this time, the antibacterial activity value was calculated as log(B/A), where A is the number of bacteria in the container sample after 24 hours, and B is the number of bacteria in the control group (blank, Stomacher 400 poly-bag) after 24 hours.

2) Anti-fungal property: Anti-fungal property was evaluated according to ASTM G21-15. In detail, five types of mold ( Aspergillus brasiliensis ATCC 9642, Chaetomium globosum ATCC 6205, Penicillium funiculosum ATCC 11797, Trichoderma virens ATCC 9645, Aureobasidium pullulans ATCC 15233) were cultured for 28 days at 28-30℃ and relative humidity of 85% or more. The grade was evaluated according to the following criteria.

- Level 0: unable to grow

- Grade 1: Grows less than 10% of the area above the specimen.

- Grade 2: Grows from more than 10 area% to less than 30 area% above the specimen.

- Grade 3: Grows from more than 30 area% to less than 60 area% above the specimen.

- Grade 4: Grows over 60% of the area above the specimen.

3) Impact resistance: Izod impact strength (23°C) was evaluated according to ASTM D256.

Antibacterial activity value (log) Anti-fungal properties (grade) Impact strength (J/m) Example 1 6.3 0 234 Example 2 4.1 2 221 Example 3 3.6 2 219 Example 4 1.2 3 240 Example 5 5.1 One 237 Example 6 6.0 0 235 Example 7 6.4 0 231 Example 8 6.4 0 228 Example 9 6.5 0 198 Comparative Example 1 3.2 2 203 Comparative Example 2 4.7 3 236 Comparative Example 3 5.2 2 234 Comparative Example 4 2.5 3 236 Comparative Example 5 6.3 0 184

Referring to Tables 1 to 3, the sanitary sealed container sample prepared in Example 1 showed antibacterial and All anti-fungal properties were excellent, and the impact resistance was high at over 230 J/m due to the addition of EPDM rubber.

On the other hand, Examples 2 and 3, in which zinc oxide nanoparticles surface-modified with silicone oil exceeding HLB 3 to 8, zeolite, and calcined shell powder were added in the same amount as in Example 1, and zinc oxide nanoparticles without surface modification, In the case of Comparative Example 1, in which zeolite and calcined shell powder were added, it did not mix well with the ethylene-propylene random copolymer resin, and agglomeration between particles became more severe, resulting in significantly lower antibacterial and antifungal properties than Example 1, and impact resistance. There was also a problem of deterioration.

In addition, Comparative Examples 2 to 4 had poor antibacterial and antifungal properties as one of zinc oxide nanoparticles, zeolite, and calcined shell powder respectively modified with silicone oil with HLB 3 to 8 was not added.

Meanwhile, in the case of Comparative Example 5 without the addition of EPDM rubber, the antibacterial and antifungal properties were very excellent, but there was a problem in that the impact strength was greatly reduced.

Although the present invention has been described through the above-described specific details and limited examples, this is only provided to facilitate a more general understanding of the present invention, and the present invention is not limited to the above-mentioned examples, and the present invention belongs to Those skilled in the art can make various modifications and variations from this description.

Accordingly, the spirit of the present invention should not be limited to the described embodiments, and the scope of the patent claims described below as well as all modifications that are equivalent or equivalent to the scope of this patent claim shall fall within the scope of the spirit of the present invention. .

Claims (9)

Contains polyolefin resin, ethylene-propylene-diene rubber, surface-modified zinc oxide nanoparticles, surface-modified zeolite, surface-modified fired shell powder, and anti-fog agent,
The surface-modified zinc oxide nanoparticles, surface-modified zeolite, and surface-modified fired shell powder are surface-modified with silicone oil,
The silicone oil is a sanitary sealed container with excellent antibacterial and antifungal properties, characterized in that the silicone oil has an HLB of 3 to 8. delete delete According to clause 1,
The silicone oil is dimethicone, PEG-3 dimethicone, PEG-10 dimethicone, PEG/PPG-20/22 butyl ether dimethicone, cetyl PEG/PPG-10/1 dimethicone, PEG-9 polydimethylsiloxyethyl A hygienic sealed container with excellent antibacterial and antifungal properties, which is one or more selected from the group consisting of dimethicone, and lauryl PEG-9 polydimethylsiloxyethyl dimethicone. According to clause 1,
The polyolefin resin is any one or two or more selected from the group consisting of propylene homopolymer, ethylene-propylene copolymer, and ethylene-propylene-hexene terpolymer. A sanitary sealed container with excellent antibacterial and antifungal properties. According to clause 1,
The ethylene-propylene-diene rubber is an ethylene-propylene-ethylidene norbornene rubber, a sanitary sealed container with excellent antibacterial and anti-fungal properties. According to clause 6,
The ethylene-propylene-ethylidenenorbornene rubber contains 60 to 80% by weight of ethylene monomer, 15 to 30% by weight of propylene monomer, and 3 to 10% by weight of ethylidenenorbornene, and has excellent antibacterial and antifungal properties. Airtight container. According to clause 1,
A sanitary sealed container with excellent antibacterial and antifungal properties, wherein the antifog agent is any one or two or more selected from the group consisting of sorbitan fatty acid ester, glycerin fatty acid ester, and polyglycerin fatty acid ester. a) mixing polyolefin resin chips, surface-modified zinc oxide nanoparticles, surface-modified zeolite, surface-modified fired shell powder, and anti-fog agent and then extruding to produce masterbatch pellets; and
b) mixing the masterbatch pellets, polyolefin resin chips, and ethylene-propylene-diene rubber and then injection molding to produce a sanitary sealed container;
The surface-modified zinc oxide nanoparticles, surface-modified zeolite, and surface-modified fired shell powder are surface-modified with silicone oil,
A method of manufacturing a sanitary sealed container with excellent antibacterial and antifungal properties, wherein the silicone oil has an HLB of 3 to 8.