KR102867229B1 - Storage containers using PE - Google Patents

Abstract

The present invention provides a storage container using polyethylene (PE). The storage container according to the present invention is manufactured using polyethylene, and is characterized by its lightness, economy, and recyclability. Furthermore, it exhibits excellent mechanical properties, such as tensile strength.

Description

Storage containers using PE

The present invention relates to a storage container using polyethylene (PE).

Glass has been used for centuries to preserve food, beverages, chemicals, and cosmetics. Its widespread use as a storage container demonstrates its resilience and functionality. Glass is used in a wide range of applications, from preserving food to transmitting signals that power the internet. It is a vital material for human progress. Therefore, the United Nations has designated 2022 as the "International Year of Glass" to commemorate glass's contributions to cultural and scientific advancements.

When disposed of in the natural environment, glass is less likely to cause pollution than plastic. Unlike plastic, which breaks down into microplastics that can leach into soil and water, glass is non-toxic. This is why glass is often packaged as a more sustainable alternative to plastic.

However, the environmental footprint of glass bottles is greater than that of plastic, beverage cartons, or aluminum cans. Silica sand mining can cause serious environmental damage, ranging from land degradation to biodiversity loss. Furthermore, a major challenge with glass recycling is the lack of a viable alternative to the remelting process, the most energy-intensive process in glass production.

Meanwhile, polyethylene material has the advantages of being lightweight, strong, elastic, rust-free, hygienic, and emits the least carbon during recycling and is inexpensive.

Patent Document 1: Republic of Korea Patent Publication No. 10-2005-0088465

An object of the present invention is to provide a storage container using PE.

The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the description below.

In order to achieve the above purpose, the present invention

Storage containers made of polyethylene (PE) are provided.

In addition, the storage container is characterized in that it is manufactured using a masterbatch containing 78-82 parts by weight of high-density polyethylene (HDPE) resin, 16-20 parts by weight of additive, and 1-3 parts by weight of plasticizer.

In addition, the additive is a mixed particle in which copper oxide particles having a particle size of 40-60 nm and zinc oxide particles having a particle size of 180-220 nm are mixed in a weight ratio of 3:1.

The above plasticizer is characterized in that it is dioctyl phthalate.

In addition, the additive is a mixture of 58-62 parts by weight of mixed particles in which copper oxide particles having a particle size of 40-60 nm and zinc oxide particles having a particle size of 180-220 nm are mixed in a weight ratio of 3:1 and 38-42 parts by weight of pulp fibers having an average length of 80-120 ㎛ and an average diameter of 1-5 ㎛.

The above plasticizer is characterized in that it is dioctyl phthalate.

In addition, the additive is a mixture of 58-62 parts by weight of mixed particles in which copper oxide particles having a particle size of 40-60 nm and zinc oxide particles having a particle size of 180-220 nm are mixed in a weight ratio of 3:1 and 38-42 parts by weight of polymer-coated pulp fibers.

The above polymer coated pulp fibers are,

A step of preparing a pulp fiber dispersion by mixing 12-16 parts by weight of pulp fibers having an average length of 80-120 ㎛ and an average diameter of 1-5 ㎛ and 84-88 parts by weight of purified water, and then ultrasonically treating the mixture for 8-12 minutes; a step of adding 12-16 parts by weight of bis(triethoxy silylpropyl)tetrasulfide to 100 parts by weight of the pulp fiber dispersion, and ultrasonically treating the mixture for 110-130 minutes at a temperature of 48-52°C to cause a primary reaction; After the first reaction, a step of mixing 58-62 parts by weight of an acrylic copolymer containing 23-27 parts by weight of ethyl acrylate monomer units, 23-27 parts by weight of 2-(dimethylamino)ethyl methacrylate monomer units, 23-27 parts by weight of ethyl acetoxyacrylate monomer units, and 23-27 parts by weight of methyl 2-fluoroacrylate monomer units with 38-42 parts by weight of ethanol with respect to 100 parts by weight of the pulp fiber dispersion, adding 38-42 parts by weight of a polymer dispersion, and performing a second reaction by ultrasonic treatment at a temperature of 63-67°C for 110-130 minutes; and a step of centrifuging, washing with ethanol, and drying after the second reaction;

The above plasticizer is characterized in that it is dioctyl phthalate.

In addition, the storage container is manufactured using a masterbatch containing 63-67 parts by weight of high-density polyethylene (HDPE) resin, 13-17 parts by weight of core-shell polymer, 16-20 parts by weight of additive, and 1-3 parts by weight of plasticizer.

The above core-shell polymer is,

A step of preparing a first pre-emulsion by mixing 28-32 parts by weight of purified water, 8-12 parts by weight of sodium laureth sulfate, 18-22 parts by weight of methyl methacrylate, 18-22 parts by weight of methacrylic acid, 8-12 parts by weight of 3-(acryloyloxy) propyltrimethoxysilane, and 8-12 parts by weight of isodecyl acrylate; A step of mixing 28-32 parts by weight of purified water, 0.08-0.12 parts by weight of sodium bicarbonate, 0.0008-0.0012 parts by weight of ferrous sulfate, 0.008-0.012 parts by weight of disodium ethylenediaminetetraacetate, and 88-92 parts by weight of the first pre-emulsion in a reactor, and stirring at a rotation speed of 200-400 rpm at a temperature of 48-52°C; After stirring, a step of adding 0.2-0.4 parts by weight of azobisisobutyronitrile (AIBN), and reacting at a temperature of 38-42°C for 5-7 hours to prepare a core polymer; A step of preparing a second pre-emulsion by mixing 28-32 parts by weight of purified water, 8-12 parts by weight of sodium laureth sulfate, 13-17 parts by weight of methyl methacrylate, 13-17 parts by weight of isooctyl methacrylate, 13-17 parts by weight of 2-ethylamino methacrylate, and 13-17 parts by weight of 2-(perfluorooctyl)ethyl methacrylate; and a step of adding 88-92 parts by weight of the second pre-emulsion and 0.2-0.4 parts by weight of azobisisobutyronitrile (AIBN) to a reactor in which a core polymer is prepared, and reacting at a temperature of 53-57°C for 8-10 hours; is performed to prepare,

The above additive is a mixture of 58-62 parts by weight of mixed particles in which copper oxide particles having a particle size of 40-60 nm and zinc oxide particles having a particle size of 180-220 nm are mixed in a weight ratio of 3:1 and 38-42 parts by weight of polymer-coated pulp fibers.

The above polymer coated pulp fibers are,

A step of preparing a pulp fiber dispersion by mixing 12-16 parts by weight of pulp fibers having an average length of 80-120 ㎛ and an average diameter of 1-5 ㎛ and 84-88 parts by weight of purified water, and then ultrasonically treating the mixture for 8-12 minutes; a step of adding 12-16 parts by weight of bis(triethoxy silylpropyl)tetrasulfide to 100 parts by weight of the pulp fiber dispersion, and ultrasonically treating the mixture for 110-130 minutes at a temperature of 48-52°C to cause a primary reaction; After the first reaction, a step of mixing 58-62 parts by weight of an acrylic copolymer containing 23-27 parts by weight of ethyl acrylate monomer units, 23-27 parts by weight of 2-(dimethylamino)ethyl methacrylate monomer units, 23-27 parts by weight of ethyl acetoxyacrylate monomer units, and 23-27 parts by weight of methyl 2-fluoroacrylate monomer units with 38-42 parts by weight of ethanol with respect to 100 parts by weight of the pulp fiber dispersion, adding 38-42 parts by weight of a polymer dispersion, and performing a second reaction by ultrasonic treatment at a temperature of 63-67°C for 110-130 minutes; and a step of centrifuging, washing with ethanol, and drying after the second reaction;

The above plasticizer is characterized in that it is dioctyl phthalate.

In addition, the present invention

A step of preparing a first pre-emulsion by mixing 28-32 parts by weight of purified water, 8-12 parts by weight of sodium laureth sulfate, 18-22 parts by weight of methyl methacrylate, 18-22 parts by weight of methacrylic acid, 8-12 parts by weight of 3-(acryloyloxy) propyltrimethoxysilane, and 8-12 parts by weight of isodecyl acrylate; A step of mixing 28-32 parts by weight of purified water, 0.08-0.12 parts by weight of sodium bicarbonate, 0.0008-0.0012 parts by weight of ferrous sulfate, 0.008-0.012 parts by weight of disodium ethylenediaminetetraacetate, and 88-92 parts by weight of the first pre-emulsion in a reactor, and stirring at a rotation speed of 200-400 rpm at a temperature of 48-52°C; After stirring, a step of adding 0.2-0.4 parts by weight of azobisisobutyronitrile (AIBN), and reacting at a temperature of 38-42°C for 5-7 hours to prepare a core polymer; A step of preparing a second pre-emulsion by mixing 28-32 parts by weight of purified water, 8-12 parts by weight of sodium laureth sulfate, 13-17 parts by weight of methyl methacrylate, 13-17 parts by weight of isooctyl methacrylate, 13-17 parts by weight of 2-ethylamino methacrylate, and 13-17 parts by weight of 2-(perfluorooctyl)ethyl methacrylate; and a step of preparing a core-shell polymer, including adding 88-92 parts by weight of the second pre-emulsion and 0.2-0.4 parts by weight of azobisisobutyronitrile (AIBN) to a reactor in which a core polymer is prepared, and reacting the mixture at a temperature of 53-57°C for 8-10 hours.

A step of preparing a pulp fiber dispersion by mixing 12-16 parts by weight of pulp fibers having an average length of 80-120 ㎛ and an average diameter of 1-5 ㎛ and 84-88 parts by weight of purified water, and then ultrasonically treating the mixture for 8-12 minutes; a step of adding 12-16 parts by weight of bis(triethoxy silylpropyl)tetrasulfide to 100 parts by weight of the pulp fiber dispersion, and ultrasonically treating the mixture for 110-130 minutes at a temperature of 48-52°C to cause a primary reaction; A step of preparing a polymer-coated pulp fiber, comprising: a step of adding 38-42 parts by weight of a polymer dispersion prepared by mixing 58-62 parts by weight of an acrylic copolymer containing 23-27 parts by weight of an ethyl acrylate monomer unit, 23-27 parts by weight of a 2-(dimethylamino)ethyl methacrylate monomer unit, 23-27 parts by weight of an ethyl acetoxyacrylate monomer unit, and 23-27 parts by weight of a methyl 2-fluoroacrylate monomer unit with 38-42 parts by weight of ethanol to 100 parts by weight of the pulp fiber dispersion after the first reaction, and ultrasonicating the mixture at a temperature of 63-67°C for 110-130 minutes to cause a second reaction; and a step of centrifuging, washing with ethanol, and drying after the second reaction;

A step of preparing an additive by mixing 58-62 parts by weight of mixed particles in which copper oxide particles having a particle size of 40-60 nm and zinc oxide particles having a particle size of 180-220 nm are mixed in a weight ratio of 3:1 and 38-42 parts by weight of the polymer-coated pulp fiber;

A step of manufacturing a composite by melting high-density polyethylene (HDPE) resin and mixing 63-67 parts by weight of the melted high-density polyethylene resin, 13-17 parts by weight of the core-shell polymer, 16-20 parts by weight of the additive, and 1-3 parts by weight of dioctyl phthalate as a plasticizer;

A step of melting and extruding the above complex while stirring at a temperature range of 200-260°C;

A step of manufacturing a masterbatch by cooling and cutting the extrudate formed by performing the above melting and extrusion; and

A method for manufacturing a storage container is provided, including the step of melting the above masterbatch at a temperature of 200-260°C and injection molding it.

The storage container according to the present invention is manufactured using polyethylene, and is characterized by its lightness, economy, and recyclability. Furthermore, it exhibits excellent mechanical properties, such as tensile strength.

Below, various embodiments are described in more detail. The embodiments described herein are susceptible to various modifications. While specific embodiments may be described in detail in the detailed description, the disclosed specific embodiments are intended solely to facilitate understanding of various embodiments. Therefore, the disclosed specific embodiments are not intended to limit the technical scope of the invention, and should be understood to encompass all equivalents or alternatives falling within the spirit and technical scope of the invention.

Terms that include ordinal numbers, such as primary, secondary, first, second, etc., may be used to describe various components, but these components are not limited by the aforementioned terms. The aforementioned terms are used solely to distinguish one component from another.

In this specification, terms such as "include" or "have" are intended to specify the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but should be understood as not excluding in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof. When a component is referred to as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to the other component, but that other components may also exist in between. On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that no other components exist in between.

In addition, when describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof is abbreviated or omitted.

The present invention

Storage containers made of polyethylene (PE) are provided.

Hereinafter, a storage container according to the present invention will be described in detail.

The storage container according to the present invention is manufactured using polyethylene and has the characteristics of being lightweight, economical, and recyclable.

The above storage container is preferably manufactured using a masterbatch containing 78-82 parts by weight of high-density polyethylene (HDPE) resin, 16-20 parts by weight of additive, and 1-3 parts by weight of plasticizer, and more preferably manufactured using a masterbatch containing 79-81 parts by weight of high-density polyethylene (HDPE) resin, 17-19 parts by weight of additive, and 1.5-2.5 parts by weight of plasticizer.

The above storage container is made of high-density polyethylene as its main resin and has excellent durability.

It is preferable that the above additive be a mixed particle in which copper oxide particles having a particle size of 40-60 nm and zinc oxide particles having a particle size of 180-220 nm are mixed in a weight ratio of 3:1.

Copper oxide particles, especially those with a particle size of 40-60 nm, are copper compounds that exhibit antibacterial activity and exhibit excellent antibacterial activity. Since copper oxide readily releases copper ions, the released copper ions can easily inhibit the metabolic functions of microorganisms by binding to enzymes or proteins when they come into contact with microorganisms, thereby reducing their activity. Copper oxide particles may have a crystalline structure or an amorphous structure. When copper oxide particles have a crystalline structure, regardless of the crystalline structure, they can inactivate bacteria or viruses by coordinating to proteins that constitute the surface of bacteria or viruses, thereby changing the structure of the proteins.

Zinc oxide particles, particularly zinc oxide nanoparticles, utilize sunlight as an energy source to catalyze catalytic reactions (oxidation and reduction), decomposing various bacteria and pollutants. Zinc oxide excels as a photocatalytic material due to its high UV absorption, high oxidizing power, and physical and chemical stability. When exposed to light, zinc oxide undergoes a redox reaction, generating ^O2- or OH radicals, which act as powerful oxidizing agents. These radicals decompose surrounding harmful organic compounds and convert them into carbon dioxide and water. The photocatalytic effect of zinc oxide particles can restore the surface of contaminated PVC window sashes to their original color. Furthermore, zinc oxide can also inhibit the metabolism of viruses and bacteria, thereby killing and removing them. The nanosized zinc oxide increases its specific surface area, providing a surface effect not found in bulk materials.

By applying a mixed particle in which copper oxide particles having a particle size of 40-60 nm and zinc oxide particles having a particle size of 180-220 nm are mixed in a weight ratio of 3:1 as the above additive, the mixed particle has excellent miscibility with polyethylene resin and is easy to disperse, thereby ensuring excellent mechanical properties.

In addition, the additive is preferably a mixture of 58-62 parts by weight of mixed particles in which copper oxide particles having a particle size of 40-60 nm and zinc oxide particles having a particle size of 180-220 nm are mixed in a weight ratio of 3:1 and 38-42 parts by weight of pulp fibers having an average length of 80-120 ㎛ and an average diameter of 1-5 ㎛, and more preferably a mixture of 59-61 parts by weight of mixed particles and 39-41 parts by weight of pulp fibers.

By applying a composite of pulp fibers having an average length of 80-120 ㎛ and an average diameter of 1-5 ㎛ with mixed particles in which copper oxide particles having a particle size of 40-60 nm and zinc oxide particles having a particle size of 180-220 nm are mixed in a weight ratio of 3:1, the fibers and particles are structurally stabilized with each other, thereby imparting higher mechanical properties.

Furthermore, it is preferable that the additive be a mixture of 58-62 parts by weight of mixed particles in which copper oxide particles having a particle size of 40-60 nm and zinc oxide particles having a particle size of 180-220 nm are mixed in a weight ratio of 3:1 and 38-42 parts by weight of polymer-coated pulp fibers, and it is more preferable that the additive be a mixture of 59-61 parts by weight of mixed particles and 39-41 parts by weight of polymer-coated pulp fibers.

The above polymer coated pulp fibers are,

A step of preparing a pulp fiber dispersion by mixing 12-16 parts by weight of pulp fibers having an average length of 80-120 ㎛ and an average diameter of 1-5 ㎛ and 84-88 parts by weight of purified water, and then ultrasonically treating the mixture for 8-12 minutes; a step of adding 12-16 parts by weight of bis(triethoxy silylpropyl)tetrasulfide to 100 parts by weight of the pulp fiber dispersion, and ultrasonically treating the mixture for 110-130 minutes at a temperature of 48-52°C to cause a primary reaction; After the first reaction, a step of mixing 58-62 parts by weight of an acrylic copolymer containing 23-27 parts by weight of an ethyl acrylate monomer unit, 23-27 parts by weight of a 2-(dimethylamino)ethyl methacrylate monomer unit, 23-27 parts by weight of an ethyl acetoxyacrylate monomer unit, and 23-27 parts by weight of a methyl 2-fluoroacrylate monomer unit with 38-42 parts by weight of ethanol with respect to 100 parts by weight of the pulp fiber dispersion is added, and a step of performing a second reaction by ultrasonic treatment at a temperature of 63-67°C for 110-130 minutes is performed; and a step of centrifuging, washing with ethanol, and drying after the second reaction is performed; is used.

By applying the above pulp fiber as an additive, firstly coating bis(triethoxy silylpropyl)tetrasulfide, and secondly coating and applying an acrylic copolymer including 23-27 parts by weight of ethyl acrylate monomer units, 23-27 parts by weight of 2-(dimethylamino)ethyl methacrylate monomer units, 23-27 parts by weight of ethyl acetoxyacrylate monomer units, and 23-27 parts by weight of methyl 2-fluoroacrylate monomer units, the miscibility and dispersibility with high-density polyethylene resin are improved, and the bonding force with the additive is excellent, so that high mechanical properties can be secured.

The above plasticizer uses dioctyl phthalate.

In addition, it is more preferable that the storage container is manufactured using a masterbatch comprising 63-67 parts by weight of high-density polyethylene (HDPE) resin, 13-17 parts by weight of core-shell polymer, 16-20 parts by weight of additive, and 1-3 parts by weight of plasticizer.

The above core-shell polymer is,

A step of preparing a first pre-emulsion by mixing 28-32 parts by weight of purified water, 8-12 parts by weight of sodium laureth sulfate, 18-22 parts by weight of methyl methacrylate, 18-22 parts by weight of methacrylic acid, 8-12 parts by weight of 3-(acryloyloxy) propyltrimethoxysilane, and 8-12 parts by weight of isodecyl acrylate; A step of mixing 28-32 parts by weight of purified water, 0.08-0.12 parts by weight of sodium bicarbonate, 0.0008-0.0012 parts by weight of ferrous sulfate, 0.008-0.012 parts by weight of disodium ethylenediaminetetraacetate, and 88-92 parts by weight of the first pre-emulsion in a reactor, and stirring at a rotation speed of 200-400 rpm at a temperature of 48-52°C; After stirring, a step of adding 0.2-0.4 parts by weight of azobisisobutyronitrile (AIBN), and reacting at a temperature of 38-42°C for 5-7 hours to prepare a core polymer; A step of preparing a second pre-emulsion by mixing 28-32 parts by weight of purified water, 8-12 parts by weight of sodium laureth sulfate, 13-17 parts by weight of methyl methacrylate, 13-17 parts by weight of isooctyl methacrylate, 13-17 parts by weight of 2-ethylamino methacrylate, and 13-17 parts by weight of 2-(perfluorooctyl)ethyl methacrylate; and a step of adding 88-92 parts by weight of the second pre-emulsion and 0.2-0.4 parts by weight of azobisisobutyronitrile (AIBN) to a reactor in which a core polymer is prepared, and reacting at a temperature of 53-57°C for 8-10 hours; is used.

The masterbatch for manufacturing the above storage container uses high-density polyethylene resin as the main resin, and by applying the core-shell polymer as the auxiliary resin, it is possible to secure better mechanical properties.

In addition, the present invention

A step of preparing a first pre-emulsion by mixing 28-32 parts by weight of purified water, 8-12 parts by weight of sodium laureth sulfate, 18-22 parts by weight of methyl methacrylate, 18-22 parts by weight of methacrylic acid, 8-12 parts by weight of 3-(acryloyloxy) propyltrimethoxysilane, and 8-12 parts by weight of isodecyl acrylate; A step of mixing 28-32 parts by weight of purified water, 0.08-0.12 parts by weight of sodium bicarbonate, 0.0008-0.0012 parts by weight of ferrous sulfate, 0.008-0.012 parts by weight of disodium ethylenediaminetetraacetate, and 88-92 parts by weight of the first pre-emulsion in a reactor, and stirring at a rotation speed of 200-400 rpm at a temperature of 48-52°C; After stirring, a step of adding 0.2-0.4 parts by weight of azobisisobutyronitrile (AIBN), and reacting at a temperature of 38-42°C for 5-7 hours to prepare a core polymer; A step of preparing a second pre-emulsion by mixing 28-32 parts by weight of purified water, 8-12 parts by weight of sodium laureth sulfate, 13-17 parts by weight of methyl methacrylate, 13-17 parts by weight of isooctyl methacrylate, 13-17 parts by weight of 2-ethylamino methacrylate, and 13-17 parts by weight of 2-(perfluorooctyl)ethyl methacrylate; and a step of preparing a core-shell polymer, including adding 88-92 parts by weight of the second pre-emulsion and 0.2-0.4 parts by weight of azobisisobutyronitrile (AIBN) to a reactor in which a core polymer is prepared, and reacting the mixture at a temperature of 53-57°C for 8-10 hours.

A step of preparing a pulp fiber dispersion by mixing 12-16 parts by weight of pulp fibers having an average length of 80-120 ㎛ and an average diameter of 1-5 ㎛ and 84-88 parts by weight of purified water, and then ultrasonically treating the mixture for 8-12 minutes; a step of adding 12-16 parts by weight of bis(triethoxy silylpropyl)tetrasulfide to 100 parts by weight of the pulp fiber dispersion, and ultrasonically treating the mixture for 110-130 minutes at a temperature of 48-52°C to cause a primary reaction; A step of preparing a polymer-coated pulp fiber, comprising: a step of adding 38-42 parts by weight of a polymer dispersion prepared by mixing 58-62 parts by weight of an acrylic copolymer containing 23-27 parts by weight of an ethyl acrylate monomer unit, 23-27 parts by weight of a 2-(dimethylamino)ethyl methacrylate monomer unit, 23-27 parts by weight of an ethyl acetoxyacrylate monomer unit, and 23-27 parts by weight of a methyl 2-fluoroacrylate monomer unit with 38-42 parts by weight of ethanol to 100 parts by weight of the pulp fiber dispersion after the first reaction, and ultrasonicating the mixture at a temperature of 63-67°C for 110-130 minutes to cause a second reaction; and a step of centrifuging, washing with ethanol, and drying after the second reaction;

A step of preparing an additive by mixing 58-62 parts by weight of mixed particles in which copper oxide particles having a particle size of 40-60 nm and zinc oxide particles having a particle size of 180-220 nm are mixed in a weight ratio of 3:1 and 38-42 parts by weight of the polymer-coated pulp fiber;

A step of manufacturing a composite by melting high-density polyethylene (HDPE) resin and mixing 63-67 parts by weight of the melted high-density polyethylene resin, 13-17 parts by weight of the core-shell polymer, 16-20 parts by weight of the additive, and 1-3 parts by weight of dioctyl phthalate as a plasticizer;

A step of melting and extruding the above complex while stirring at a temperature range of 200-260°C;

A step of manufacturing a masterbatch by cooling and cutting the extrudate formed by performing the above melting and extrusion; and

A method for manufacturing a storage container is provided, including the step of melting the above masterbatch at a temperature of 200-260°C and injection molding it.

The storage container according to the present invention is manufactured using polyethylene, and is characterized by its lightness, economy, and recyclability. Furthermore, it exhibits excellent mechanical properties, such as tensile strength.

Hereinafter, the present invention will be described in more detail by the following examples.

However, the following examples are only intended to illustrate the content of the present invention, and the scope of the invention is not limited by the examples and experimental examples.

<Example 1> Preparation of master batch-1

A composite was prepared by mixing 80 parts by weight of high-density polyethylene (HDPE) resin, 18 parts by weight of calcium carbonate, and 2 parts by weight of dioctyl phthalate, and the composite was fed into a twin-screw extruder, melted, and extruded at a temperature of 230°C to prepare a masterbatch.

<Example 2> Preparation of master batch-2

A composite was prepared by mixing 80 parts by weight of high-density polyethylene (HDPE) resin, 18 parts by weight of mixed particles in which copper oxide particles having an average particle diameter (d ₅₀ ) of 50 nm and zinc oxide particles having an average particle diameter (d ₅₀ ) of 200 nm were mixed in a weight ratio of 3:1, and 2 parts by weight of dioctyl phthalate. The composite was then fed into a twin-screw extruder, melted, and extruded at a temperature of 230°C to prepare a masterbatch.

<Example 3> Preparation of master batch - 3

A composite was prepared by mixing 80 parts by weight of high-density polyethylene (HDPE) resin, 60 parts by weight of mixed particles in which copper oxide particles having an average particle diameter (d ₅₀ ) of 50 nm and zinc oxide particles having an average particle diameter (d ₅₀ ) of 200 nm were mixed in a weight ratio of 3:1, 18 parts by weight of an additive mixed with 40 parts by weight of pulp fiber, and 2 parts by weight of dioctyl phthalate. The composite was then fed into a twin-screw extruder, melted, and extruded at a temperature of 230°C to prepare a masterbatch.

<Example 4> Preparation of master batch - 4

A composite was prepared by mixing 80 parts by weight of high-density polyethylene (HDPE) resin, 60 parts by weight of mixed particles in which copper oxide particles having an average particle diameter (d ₅₀ ) of 50 nm and zinc oxide particles having an average particle diameter (d ₅₀ ) of 200 nm were mixed in a weight ratio of 3:1, 18 parts by weight of an additive mixed with 40 parts by weight of polymer-coated pulp fiber, and 2 parts by weight of dioctyl phthalate. The composite was then fed into a twin-screw extruder, melted, and extruded at a temperature of 230°C, thereby preparing a masterbatch.

<Example 5> Preparation of master batch - 5

A composite was prepared by mixing 65 parts by weight of high-density polyethylene (HDPE) resin, 15 parts by weight of core-shell polymer, 60 parts by weight of mixed particles in which copper oxide particles having an average particle diameter (d ₅₀ ) of 50 nm and zinc oxide particles having an average particle diameter (d ₅₀ ) of 200 nm were mixed in a weight ratio of 3:1, 18 parts by weight of an additive mixed with 40 parts by weight of polymer-coated pulp fiber, and 2 parts by weight of dioctyl phthalate. The composite was then fed into a twin-screw extruder, melted, and extruded at a temperature of 230°C to prepare a masterbatch.

<Experimental Example 1> Characteristic Analysis

In order to confirm the characteristics of the masterbatch for manufacturing a storage container according to the present invention, the following tests were conducted. Using the masterbatch manufactured in Examples 1-5, specimens suitable for each property evaluation standard were manufactured and their properties were measured, and the results are shown in Table 1 below.

1. Tensile strength and elongation

It was measured according to ASTM D638, the specimen thickness was 2.0 inches, and the specimen was conditioned for 40 hours under temperature conditions of 30℃ and humidity of 50%, and then measured under speed conditions of 50㎜/min.

2. Izod impact strength

According to ASTM D256, specimens were manufactured under Dimension A conditions (10.16±0.05mm), and after conditioning the specimens in a temperature condition of 23℃ and a humidity environment of 50% for 40 hours, the room temperature Izod impact strength (IZ ₂₅ ) at a temperature of 25±1℃ and the low temperature Izod impact strength (IZ _-20 ) at a temperature of -20±1℃ were measured, respectively.

3. Flexural modulus

After conditioning the specimens at 23℃ and 50% humidity for 40 hours, measurements were made according to Procedure B conditions (0.1 mm/mm/min.) of ASTM D790.

tensile strength
(kg/cm ² ) Elongation
(%) IZ ₂₅
(kgㆍcm/cm) IZ _-20
(kgㆍcm/cm) Flexural modulus
(kg/cm ² ) Example 1 238 800 12 8 6542 Example 2 260 750 18 12 7840 Example 3 294 720 20 14 8201 Example 4 381 700 25 18 8500 Example 5 445 720 30 24 9236

As shown in Table 1 above, it was confirmed that the mechanical properties of the masterbatch for manufacturing a storage container according to the present invention were excellent.

Claims (6)

A storage container using polyethylene (PE).
The above storage container is manufactured using a masterbatch containing 78-82 parts by weight of high-density polyethylene (HDPE) resin, 16-20 parts by weight of additives, and 1-3 parts by weight of plasticizer.
The above additive is a mixture of 58-62 parts by weight of mixed particles in which copper oxide particles having a particle size of 40-60 nm and zinc oxide particles having a particle size of 180-220 nm are mixed in a weight ratio of 3:1 and 38-42 parts by weight of pulp fibers having an average length of 80-120 ㎛ and an average diameter of 1-5 ㎛.
A storage container characterized in that the plasticizer is dioctyl phthalate. delete delete delete delete delete