KR102566933B1 - Uni-material Based Oxygen Barrier Resin Composition And Eco-Friendly Oxygen Barrier Container Using The Same - Google Patents

Abstract

The present invention relates to a uni-material-based oxygen barrier resin composition containing a strength reinforcing agent of Homo-Polypropylene (Homo-PP), nano-clay, Polyolefin Elastomer (POE), or Co-Polypropylene (Co-PP), and an oxygen barrier resin composition using the same. An oxygen barrier container is provided.
According to an embodiment of the present invention, the POE or Co-PP component supplements the impact strength that may be weakened due to the lowered ethylene content, improves the impact strength, and improves the oxygen barrier through the dispersion effect of the nanoclay, Since the oxygen-barrier resin composition based on Unimaterial using homoPP with a melt index of 30g/10min is used, it is easy to mold lightweight containers with a wall thickness of 0.2mm to less than 1.0mm.
Therefore, by manufacturing an oxygen barrier container using the uni-material-based oxygen barrier resin composition, food preservation ability (shelf life) and sealing ability can be improved, and the thickness of the container material can be manufactured to reduce material costs. It has high impact strength and is not easily broken or damaged, so the quality of the product is excellent. In addition, the same level of oxygen barrier performance can be obtained without attaching a multilayer film made of aluminum foil or ethylene vinyl alcohol to the surface of the container. The application of (Uni-Material) makes it possible to recycle what was impossible to recycle.

Description

Uni-material Based Oxygen Barrier Resin Composition And Eco-Friendly Oxygen Barrier Container Using The Same}

The present invention relates to a Uni-Material-based oxygen barrier resin composition and an oxygen barrier container using the same, and more particularly, to an oxygen barrier, improved resin flowability, and improved impact strength. Rather, it relates to a recyclable uni-material-based oxygen barrier resin composition and an oxygen barrier container manufactured using the same.

In general, polypropylene (PP) is one of the five general-purpose polymers and is used in various industries such as food packaging, textiles, pipes, and automobiles. Although it is widely used as a food packaging material due to its relatively excellent mechanical properties, low price, low moisture permeability, heat resistance and chemical resistance, it has high oxygen permeability due to its molecular structure, so improvement in food preservation ability is required.

Therefore, as a container for lowering the oxygen permeability, a multi-layer film (made of PP + AL foil or EVOH + PET or PA) composed of aluminum foil or ethylene vinyl alcohol (EVOH) is attached to the surface of the container to the PP raw material container. However, this method has a rather high oxygen blocking effect, but is disadvantageous in terms of recycling.

Due to the recent seriousness of environmental pollution, the Ministry of Environment introduced a recycling ease rating system and established plastic recycling measures to reduce plastic waste by 20% by 2025, and the recycling rate of waste plastics separated and discharged from the current 54% to 70 by 2025 It is planned to increase the percentage.

On the other hand, the gas penetrating the polymer is condensed on the surface of the polymer, dissolved into it, and then permeated and released by diffusion of the gas through the gap between the polymer chains. That is, in order to improve gas barrier properties, a polymer structure with high cohesive energy density between polymer chains, high crystallinity, and additional chain radicals capable of filling the gaps between polymer chains can be reduced in order to improve gas barrier properties. One of a branched polymer chain, a high-density cross-linked structure, a hydrogen bond, or the presence of a polar group may be used.

Among these methods, the free volume can be reduced by adding inorganic nano-clay as a filler or the entrance of the free volume can be blocked, thereby delaying the entry and exit of free volume and gas such as oxygen into the polymer.

However, there is a problem in that impact strength is weakened when nano clay is added to increase oxygen barrier properties.

Accordingly, there is an urgent need to develop a resin composition that has improved oxygen barrier properties, increased impact strength, and is easy to recycle in order to improve food preservation ability.

Republic of Korea Patent Registration No. 10-1064815 (registration date 2011.09.06) Republic of Korea Patent Registration No. 10-1495783 (registration date 2015.02.16.)

The present invention has been made to solve the above problems,

An object of the present invention is to increase oxygen barrier properties through the dispersing effect of nanoclay, to improve impact strength by supplementing the impact strength that may be weakened due to the low ethylene content, and to improve the impact strength with POE or Co-PP components, and to improve the flowability of the resin. An object of the present invention is to provide a uni-material-based oxygen barrier resin composition that is not only easy to mold but also recyclable, and an oxygen barrier container manufactured using the same.

The uni-material-based oxygen barrier resin composition according to one aspect of the present invention provided to achieve the above object is homo-PP (Homo-Polypropylene), nano-clay (nano clay), POE (Polyolefin Elastomer) or Co- It is characterized in that it contains a strength reinforcing agent of PP (Co-Polypropylene).

Here, the uni-material-based oxygen barrier resin composition includes 83 to 88% by weight of the homo-polypropylene (PP), 7 to 12% by weight of the polyolefin elastomer (POE), and 3 to 8% by weight of the nano clay. Characterized in that it is composed of %.

In addition, it is characterized by including 35 to 45% by weight of the homo-polypropylene (Homo-PP), 50 to 60% by weight of the Co-Polypropylene (Co-PP), and 3 to 8% by weight of the nano clay. .

In addition to this, it is characterized in that it contains 0.1 to 0.5% by weight of the pigment.

In addition, the nano-clay is characterized in that bentonite (Bentonite).

An oxygen barrier container according to another aspect of the present invention is characterized in that it is manufactured using the uni-material-based oxygen barrier resin composition, and the oxygen barrier container has a thickness (t) of 0.2 mm to 1.0 mm. characterized by

The oxygen barrier resin composition based on Unimaterial according to an embodiment of the present invention improves the impact strength by supplementing the impact strength that may be weakened due to the lowered ethylene content, and improves the impact strength through the dispersion effect of the nano-clay. It enhances barrier properties and has good resin flowability, so it has the effect of facilitating molding.

In addition, by manufacturing an oxygen-barrier container using a uni-material-based oxygen-barrier resin composition, food preservation ability (shelf life) and sealing ability can be improved, and material costs can be reduced because the thickness of the container material can be made thin. , It has high impact strength and is not easily broken or damaged, which has the effect of improving the quality of the product. In addition, the same level of oxygen barrier performance can be obtained without attaching a multilayer film made of aluminum foil or ethylene vinyl alcohol to the surface of the container. The application of (Uni-Material) makes it possible to recycle what was impossible to recycle. That is, there is an effect of securing a container that enhances oxygen barrier properties while enabling recycling by making non-polyolefin, non-recyclable, non-recyclable materials such as aluminum thin films or EVOH films into uni-materials.

1 is a schematic diagram showing the role of nanoclay dispersed inside polypropylene in a uni-material-based oxygen barrier resin composition according to an embodiment of the present invention.
2 is a photograph of an oxygen barrier container manufactured using a uni-material-based oxygen barrier resin composition according to the present invention.
3 and 4 are test reports of the Korea Conformity Laboratories for the oxygen permeability of Example 1.
5 and 6 are test reports of the Korea Conformity Laboratories for the oxygen permeability of Example 2.
7 and 8 are test reports of the Korea Conformity Laboratories for the oxygen permeability of Example 3.
9 and 10 are test reports of the Korea Conformity Laboratories for the oxygen permeability of Example 4.
11 and 12 are test reports of the Korea Conformity Laboratories for the oxygen permeability of Example 5.
13 and 14 are test reports of the Korea Constructive Living Environment Research Institute for the oxygen permeability of Comparative Example 1.
15 and 16 are test reports of the Korea Constructive Living Environment Research Institute for the oxygen permeability of Comparative Example 2.
17 and 18 are test reports of the Korea Constructive Living Environment Research Institute for the oxygen permeability of Comparative Example 3.
19 and 20 are test reports of the Korea Constructive Living Environment Research Institute for the oxygen permeability of Comparative Example 4.

The detailed description of the present invention below is an embodiment in which the present invention can be practiced, and reference is made to the accompanying drawings shown as examples for the embodiment. These embodiments are described in sufficient detail to enable one skilled in the art to practice the present invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be implemented in one embodiment in another embodiment without departing from the spirit and scope of the present invention. It should also be understood that the location or arrangement of individual components within each described embodiment may be changed without departing from the spirit and scope of the invention.

Accordingly, the detailed description set forth below is not to be taken in a limiting sense, and the scope of the present invention, if properly described, is limited only by the appended claims, along with all equivalents as claimed by those claims. Like reference numbers in the drawings indicate the same or similar function throughout the various aspects.

The terms used in the present invention have been selected from general terms that are currently widely used as much as possible while considering the functions in the present invention, but these may vary depending on the intention of a person skilled in the art or precedent, the emergence of new technologies, and the like. In addition, in certain cases, there are also terms arbitrarily selected by the applicant, and in this case, their meanings will be described in detail in the description of the relevant invention. Therefore, the term used in the present invention should be defined based on the meaning of the term and the overall content of the present invention, not simply the name of the term.

When a part in the whole of the invention is said to "include" a certain component, this means that it may further include other components, not excluding other components, unless otherwise stated.

Unimaterial-based oxygen barrier resin composition according to an embodiment of the present invention is a strength reinforcing agent of homoPP (Homp-Polypropylene), nano clay, POE (Polyolefin Elastomer) or Co-PP (Co-Polypropylene) includes That is, as the strength enhancer, POE (Polyolefin Elastomer) or Co-PP (Co-Polypropylene) may be used.

Here, homo-PP (Homo-Polypropylene) is a polypropylene product obtained by polymerizing only propylene monomer without using a co-monomer, and is composed of a single bond of propylene only. It has high crystallinity and relatively excellent mechanical properties such as tensile strength and rigidity. Therefore, it is widely used for general purposes such as household items and industrial parts.

POE (Polyolefin Elastomer) is a type of VLDPE (Very Low Density Polyethlene) among polyethylene (PE), and is a copolymer of ethylene (CH₂ = CH₂) and octene or butene using a metallocene catalyst. POE has properties similar to rubber and can improve impact resistance when used together with PP. Unlike aluminum or EVOH, which cannot be recycled as the same polyolefin-based resin, POE does not cause problems in recycling used containers.

Co-PP (Co-Polypropylene) is a resin that supplements the impact resistance of PP by copolymerizing PP and ethylene, and is classified into Random PP and Impact PP depending on its use. In addition, the ethylene content of Co-PP (Co-Polypropylene) varies depending on the type.

Nano clay can block or retard the entry and exit of free volumes and gases such as oxygen into the polymer. Oxygen that permeates the polymer permeates through the gaps between the polymer chains and is drawn into the container. That is, the nano-clay acts as an obstacle hindering the movement of oxygen by blocking a space where oxygen can move inside the polypropylene.

Referring to FIG. 1, the nano-clay is formed in the form of a dispersed layer inside polypropylene, and fills the gap in the free volume of polypropylene to provide a path through which oxygen can move. By complicating the (Path of Gas), the permeation of oxygen is delayed or blocked to show a blocking effect or the same effect as blocking.

Here, as the nano-clay, various well-known nano-sized clays may be used, but it is preferable to use nano-sized bentonite.

In the present invention, it may be a resin composition including 83 to 88 wt% of homo-polypropylene (PP), 7 to 12 wt% of polyolefin elastomer (POE), and 3 to 8 wt% of nano clay. At this time, the most preferable component ratio is 84.8% by weight of homo-polypropylene (Homo-PP), 10% by weight of polyolefin elastomer (POE), and 5% by weight of nano clay.

That is, since Homo-PP (Homo-polypropylene) and POE (Polyolefin Elastomer) are appropriately mixed, it is possible to increase oxygen barrier properties by mixing nanoclay while securing impact strength suitable for the purpose and flowability of the resin.

Here, when more than 88% by weight of homo-polypropylene (Homo-polypropylene) or more than 12% by weight of polyolefin elastomer (POE) is included, the content of nano-clay is reduced, so the impact strength is good but the oxygen barrier property is lowered, and the homo-PP (Homo-polypropylene ) 83% by weight or less, or when less than 7% by weight of POE (Polyolefin Elastomer) is included, the content of nanoclay increases to slightly increase the oxygen barrier property, but the material cost of the resin composition is too high and the impact strength is weakened.

In addition, in the present invention, it may be a resin composition comprising 35 to 45% by weight of homo-polypropylene (Homo-PP), 50 to 60% by weight of Co-Polypropylene (Co-PP), and 3 to 8% by weight of nano clay. there is. At this time, the most preferred component ratio is 39.8% by weight of homo-polypropylene (Homo-PP), 55% by weight of Co-Polypropylene (Co-PP), and 5% by weight of the nano clay.

Here, when 45% by weight or more of Homo-polypropylene (Homo-PP) or 60% by weight or more of Co-PP (Co-Polypropylene) is included, the content of nano-clay is reduced, so the impact strength is good, but the oxygen barrier property is lowered, and homoPP ( Homo-polypropylene) at 35% by weight or less, or Co-PP (Co-Polypropylene) at 50% by weight or less, the content of nano-clay increases and oxygen barrier properties can be somewhat improved, but the material cost of the resin composition is too high and the impact strength is weak. will lose

In addition, 0.1 to 0.5% by weight of the pigment may be included in the oxygen barrier resin composition based on Unimaterial. Here, the pigment is to indicate the color of the container and was reviewed based on the white color pigment.

According to another aspect of the present invention, an oxygen barrier container may be manufactured using the resin composition prepared by the above method. Here, the oxygen barrier container is injection molded, and it is preferable to have a thickness (t) of 0.2 mm to 1.0 mm in order to lower the material cost of the resin composition.

2 is a photograph of an oxygen barrier container manufactured using a uni-material-based oxygen barrier resin composition according to the present invention.

Referring to FIG. 2 , an oxygen barrier container can be manufactured by manufacturing and combining a container and a lid of a container with a uni-material-based oxygen barrier resin composition through various known molding methods.

Hereinafter, the present invention will be described in more detail through experiments of Examples and Comparative Examples of a Uni-material-based oxygen barrier resin composition and an oxygen barrier container prepared by varying the ratio of each component. The presented examples and experimental examples are only specific examples for explaining the present invention, and are not intended to limit the scope of the present invention.

<Example 1>

Melt index (MI) = 12 g / 10min homo-polypropylene (Homo-PP) 87.8% by weight, melt index (MI) = 8 g / 10min POE (Polyolefin Elastomer) 7% by weight, nano clay 5% by weight, pigment 0.2 A uni-material-based oxygen barrier resin composition was prepared by mixing the weight %, and then an oxygen barrier container having a thickness of 0.75 mm was molded by injection molding using the prepared uni-material-based oxygen barrier resin composition.

<Example 2>

Melt index (MI) = 12 g / 10min homo-polypropylene (Homo-PP) 84.8% by weight, melt index (MI) = 8 g / 10min POE (Polyolefin Elastomer) 10% by weight, nano clay 5% by weight, pigment 0.2 A uni-material-based oxygen barrier resin composition was prepared by mixing the weight %, and then an oxygen barrier container having a thickness of 0.75 mm was molded by injection molding using the prepared uni-material-based oxygen barrier resin composition.

<Example 3>

Melt index (MI) = 30 g / 10min Homo-polypropylene (Homo-PP) 84.8% by weight, melt index (MI) = 8 g / 10min POE (Polyolefin Elastomer) 10% by weight, nano clay 5% by weight, pigment 0.2 A uni-material-based oxygen barrier resin composition was prepared by mixing the weight %, and then an oxygen barrier container having a thickness of 0.75 mm was molded by injection molding using the prepared uni-material-based oxygen barrier resin composition.

<Example 4>

Melt index (MI) = 12 g / 10min homo-polypropylene (Homo-PP) 39.8% by weight, melt index (MI) = 30 g / 10min Co-PP (Co-Polypropylene) 55% by weight, nano clay 5% by weight , 0.2% by weight of the pigment was mixed to prepare a Unimaterial-based oxygen barrier resin composition, and then an oxygen barrier container having a thickness of 0.75 mm was molded by injection molding using the prepared Unimaterial-based oxygen barrier resin composition.

<Example 5>

Melt index (MI) = 30 g / 10min homo-polypropylene (Homo-PP) 39.8% by weight, melt index (MI) = 30 g / 10min Co-PP (Co-Polypropylene) 55% by weight, nano clay 5% by weight , 0.2% by weight of the pigment was mixed to prepare a Unimaterial-based oxygen barrier resin composition, and then an oxygen barrier container having a thickness of 0.75 mm was molded by injection molding using the prepared Unimaterial-based oxygen barrier resin composition.

<Comparative Example 1>

By mixing 95% by weight of Co-PP (Co-Polypropylene) with a melt index (MI) = 28 g/10min and 5% by weight of nano clay, a Uni-material-based oxygen barrier resin composition was prepared, and then the prepared Uni-material-based An oxygen barrier container having a thickness of 0.5 mm was molded by injection molding using the oxygen barrier resin composition. Here, Co-PP (Co-Polypropylene) was used that contained 12% of ethylene with respect to 100% by weight.

<Comparative Example 2>

A Uni material-based oxygen barrier resin composition was prepared by mixing 92..5 wt% of Co-PP (Co-Polypropylene) and 7.5 wt% of nano clay with a melt index (MI) = 28 g/10min, and then the fabricated uni An oxygen barrier container having a thickness of 0.5 mm was molded by injection molding using a material-based oxygen barrier resin composition. Here, Co-PP (Co-Polypropylene) was used that contained 12% of ethylene with respect to 100% by weight.

<Comparative Example 3>

By mixing 95% by weight of Co-PP (Co-Polypropylene) with a melt index (MI) = 28 g/10min and 5% by weight of nano clay, a Uni-material-based oxygen barrier resin composition was prepared, and then the prepared Uni-material-based An oxygen barrier container having a thickness of 0.75 mm was molded by injection molding using the oxygen barrier resin composition. Here, Co-PP (Co-Polypropylene) was used containing 12% of ethylene with respect to 100% by weight.

<Comparative Example 4>

94..8% by weight of Co-PP (Co-Polypropylene) with a melt index (MI) = 30 g/10min, 5% by weight of nano clay, and 0.2% by weight of pigment were mixed to prepare a Unimaterial-based oxygen barrier resin composition. Then, an oxygen barrier container having a thickness of 0.75 mm was molded by injection molding using the prepared oxygen barrier resin composition based on Unimaterial. Here, Co-PP (Co-Polypropylene) was used that contained 4% of ethylene with respect to 100% by weight.

<Experimental Example 1> Oxygen Transmittance Rate Analysis

In order to confirm the oxygen permeability of the molded oxygen barrier container, the oxygen permeability of Examples 1 to 5 and Comparative Examples 1 to 4 was analyzed, and the measurement results are shown in Table 1.

Oxygen permeability was measured with an oxygen transmission rate tester (Oxygen Transmission Rate Tester, Mocon Corp., OX-TRAN 2/61) and was measured according to ASTM F1307-20 standard.

item
raw materials nanoclay courage
thickness
(color) impact strength
(izod23℃)
kgfcm/cm MI
g/10min oxygen permeability
Result (cc/pkg day) Example 1 Homo PP87.8% (MI=12),
POE7% (MI=8) 5wt% 0.75T (white) 3.4 5.1 0.28 Example 2 Homo PP84.8% (MI=12),
POE10% (MI=8) 5wt% 0.75T (white) 4.1 6.2 0.31 Example 3 Homo PP84.8% (MI=30),
POE10% (MI=8) 5wt% 0.75T (white) 4.2 11.8 0.31 Example 4 Homo PP39.8% (MI=12),
Co-PP55% (MI=30), 5wt% 0.75T (white) 4.9 8.5 0.3 Example 5 Homo PP39.8% (MI=30),
Co-PP55% (MI=30), 5wt% 0.75T (white) 5.1 9.6 0.31 Comparative Example 1 Co-PP95% (MI=28,
Ethylene 12%) 5wt% 0.5T
(NP) 0.57 Comparative Example 2 Co-PP92.5% (MI=28,
Ethylene 12%) 7.5wt% 0.61 Comparative Example 3 Co-PP95% (MI=28,
Ethylene 12%) 5wt% 0.75T
(NP) 0.49 Comparative Example 4 Co-PP94.8% (MI=30,
ethylene 4%), pigment 0.2% 5wt% 0.75T (white) 6.9 10.8 0.34

As shown in (Table 1), Comparative Example 1 and Comparative Example 2 differ only in nanoclay content. In Comparative Example 1, the nanoclay content is 5 wt%, and in Comparative Example 2, when the nanoclay content is 7.5 wt%, the oxygen permeability of Comparative Example 1 is 0.57 cc/pkg day, Comparative Example 2 The oxygen permeability of was 0.61cc/pkg·day. That is, it was confirmed that the oxygen permeability increased by 0.04 cc/pkg day as much as the nano clay content increased by 2.5 wt% (judged to be within the measurement tolerance). In addition, Comparative Example 1 and Comparative Example 3 were containers Only the thickness of the flesh is different. When the thickness of the container of Comparative Example 1 is 0.5T and the thickness of the container of Comparative Example 3 is 0.75T, the oxygen transmission rate of Comparative Example 1 is 0.57cc/pkg day, and the oxygen transmission rate of Comparative Example 3 is 0.49cc/pkg day. It was shown as pkg·day. In other words, it was confirmed that the oxygen permeability decreased by 0.08 cc/pkg·day as the difference in the thickness of the container increased by 0.25 mm.

In addition, Comparative Example 3 and Comparative Example 4 differ only in the ethylene content of the raw material. In Comparative Example 3, the ethylene content was 12% with respect to 100% by weight of Co-PP, and in Comparative Example 4, when the ethylene content was 4% with respect to 100% by weight of Co-PP, the oxygen permeability of Comparative Example 3 was 0.49cc/pkg day, and the oxygen permeability of Comparative Example 4 was 0.34cc/pkg day. That is, it was confirmed that the oxygen permeability of Comparative Example 4 having a low ethylene content was lowered by 0.15 cc/pkg·day.

In Examples 1 to 3, POE (Polyolefin Elastomer) was used as a strength reinforcing agent.

Example 1 and Example 2 differ only in the content of POE. In Example 1, when the POE content is 7% and in Example 2, when the POE content is 10%, the oxygen transmission rate of Example 1 is 0.28cc/pkg day, and the oxygen transmission rate of Example 2 is 0.31cc/pkg day. It was shown as pkg·day. In other words, it was confirmed that as much as the POE content increased by 3%, the oxygen permeability increased by 0.03 cc/pkg·day (judged to be within the measurement tolerance).

Example 2 and Example 3 differ only in the melt index (MI) of the homo PP. When the homo PP melt index (MI) of Example 2 was 12 g/10 min and the homo PP melt index (MI) of Example 3 was 30 g/10 min, the oxygen permeability of Examples 2 and 3 was 0.31 cc/pkg It appeared the same as day. That is, it was confirmed that the difference in resin flowability did not affect the oxygen permeability.

In Examples 4 and 5, Co-PP (Co-Polypropylene) was used as a strength reinforcing agent, and only the melt index (MI) of the homo-PP was different. In Example 4, when the melt index (MI) of homo PP = 12 g/10 min and in Example 5, when the melt index (MI) of homo PP = 30 g/10 min, the oxygen permeability of Example 4 is 0.3 cc/pkg day, , The oxygen permeability of Example 5 was found to be 0.31cc/pkg·day. That is, it was confirmed that the difference in melt index (MI) did not significantly affect the oxygen permeability.

Comparing Comparative Examples and Examples, it can be seen that the oxygen permeability of Examples is significantly lower than that of Comparative Examples. Low oxygen permeability means high oxygen barrier properties, and in particular, as can be seen in Comparative Examples 3 and 4, it was confirmed that the ethylene content is a factor affecting the oxygen permeability.

In addition, it was confirmed that the form of Example 3 was the most preferred embodiment because the oxygen permeability was low and the resin flowability and impact strength were good.

As described above, the present invention improves the impact strength by supplementing the impact strength that may be weakened due to the lowered ethylene content with the POE or Co-PP component, improves the oxygen barrier property through the dispersion effect of nano-clay, and improves the flowability of the resin. By making molding easier by improving the thickness of the container material, the material cost can be reduced because the thickness of the container material can be made thin. It has the effect of improving preservation ability (extension of shelf life) and sealing ability.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the specific embodiments described above. That is, those skilled in the art to which the present invention belongs can make many changes and modifications to the present invention without departing from the spirit and scope of the appended claims, and all such appropriate changes and modifications Equivalents should be regarded as falling within the scope of this invention.

Claims (7)

Oxygen barrier resin composition based on uni-material including Homo-Polypropylene (Homo-PP), Bentonite-based nano clay, POE (Polyolefin Elastomer) or Co-PP (Co-Polypropylene) strength enhancer form,
When the oxygen barrier resin composition includes polyolefin elastomer (POE), 83 to 88 wt% of homo-polypropylene (PP), 7 to 12 wt% of polyolefin elastomer (POE), and 3 nano-clay to 8% by weight,
When the oxygen barrier resin composition includes Co-PP (Co-Polypropylene), 35 to 45 wt% of homo-PP (Homo-polypropylene), 50 to 60 wt% of Co-PP (Co-Polypropylene), and the nano Clay (nano clay) has a composition ratio of 3 to 8% by weight,
The melt index (MI) of the homo-polypropylene (PP) or polyolefin elastomer (POE) has a value of 8 to 30 g/10 min,
The oxygen barrier resin composition further comprises 0.1 to 0.5% by weight of a pigment,
An oxygen barrier container having a thickness (t) of 0.2 mm to 1.0 mm is prepared by injection molding the oxygen barrier resin composition,
A label (printing part) made of PP (Polypropylene) made of the same material as the container is further attached to the oxygen barrier container made of the oxygen barrier resin composition, so that the container and label are applied with Uni-Material. Characterized in that what was not recyclable was recyclable,
Oxygen barrier container based on Uni material. delete delete delete delete delete delete