KR102495646B1 - Multilayer plastic barrier film using eco-friendly uni-material, and a manufacturing method thereof - Google Patents

Abstract

The present invention relates to a multilayer plastic barrier film using eco-friendly uni-material and a manufacturing method thereof, and more specifically, to a multilayer plastic barrier film which is produced by co-extruding a film including a new polyolefin-based resin and a film including a single regenerated polyolefin-based resin and/or a mixed regenerated polyolefin-based resin. The film of the present invention is suitable for various uses (such as food packaging, electronic material packaging, etc.) since the film maintains excellent physical properties such as tensile strength, elongation, and abrasion resistance while improving oxygen and moisture barrier properties and has an eco-friendly effect.

Description

Multilayer plastic barrier film using eco-friendly uni-material, and a manufacturing method thereof}

The present invention relates to a multilayer plastic barrier film using an eco-friendly uni-material, and a manufacturing method thereof. More specifically, the present invention relates to a multilayer plastic barrier film produced by coextruding a film composed of a new polyolefin resin and a film composed of a single regenerated polyolefin resin and/or a mixed regenerated polyolefin resin, wherein the multilayer film comprises a coating layer It can be included and can be used as a packaging material.

The packaging material may be manufactured in various ways using various materials according to its purpose. Among them, oxygen and moisture barrier properties are very important in packaging materials for packaging food or electronic materials because deterioration or damage occurs when oxygen or moisture is absorbed into the packaging material. To this end, a method of applying a chemical coating agent to the outside of the packaging material or inserting aluminum foil into the inside of the packaging material to make a composite film is commonly used. However, when applying a chemical coating agent to the outside of the packaging material, the coating agent comes into contact with the packaging material (food) and the human body. There is a risk of inflow into the package, and when aluminum foil is inserted inside the package to manufacture it as a composite film, the sharpness of the metal material on the folding surface significantly reduces the stability of the packaging and causes environmental problems because it is difficult to recycle the material. There is a problem with

On the other hand, with the rapid increase in the use of packaging materials in modern times, environmental issues are emerging, and the development of eco-friendly packaging materials that can be reused is urgently required. Korea's annual per capita plastic consumption is 132.7 kg, ranking first in the world. The types of waste plastics can be classified according to chemical structure, raw materials used, thermal properties, etc. Polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), polyethylene terephthalate (PET) , ABS resin, etc. account for 90% of domestic waste, but the recycling rate is less than 30%, so most of them are landfilled or incinerated. When plastic is landfilled, it is non-degradable and does not decompose easily, so it exists in the environment for a long time, and when incinerated, it causes secondary air pollutants such as carbon dioxide, which causes continuous environmental pollution.

Therefore, the present invention was devised to solve the problems of the prior art as described above, and the present invention relates to a multi-layer plastic barrier film using an eco-friendly uni-material and a manufacturing method thereof. The multilayer plastic barrier film according to the present invention is expected to be widely used as a packaging composition because it greatly contributes to solving environmental problems by using a single polyolefin-based regenerated resin and/or a polyolefin-based mixed regenerated resin and has excellent oxygen and moisture blocking effects. It is expected.

The present invention relates to a packaging material composition that greatly contributes to solving environmental problems by using a polyolefin-based regenerated resin and has excellent oxygen and moisture blocking effects.

In one aspect of the present invention, a multilayer plastic barrier film using an eco-friendly uni-material is provided.

In another aspect of the present invention, a method for manufacturing a multi-layer plastic barrier film using an eco-friendly uni-material is provided.

In another aspect of the present invention, a packaging material manufactured by including a multilayer plastic barrier film using an eco-friendly uni-material is provided.

However, the technical problem to be achieved by the present invention is not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

Numerous specific details, such as specific forms, compositions and processes, are set forth below for a thorough understanding of the present invention. However, certain embodiments may be practiced without one or more of these specific details, or with other known methods and forms. In other instances, well known processes and manufacturing techniques have not been described in specific detail in order not to unnecessarily obscure the present invention. Reference throughout this specification to “one embodiment” or “an embodiment” means that a particular feature, form, composition or characteristic described in connection with the embodiment is included in one or more embodiments of the invention. Thus, the appearances of "in one embodiment" or "an embodiment" in various places throughout this specification do not necessarily refer to the same embodiment of the invention. Additionally, particular features, forms, compositions, or properties may be combined in one or more embodiments in any suitable way.

Unless there is a specific definition within the present invention, all scientific and technical terms used herein have the same meaning as commonly understood by a person skilled in the art to which the present invention belongs.

In one aspect of the present invention, a multilayer plastic barrier film using an eco-friendly uni-material is provided.

In the present invention, "Uni-Material" means a future-oriented eco-friendly material that reduces harmful substances and has high recyclability by simplifying and unifying material parts. In the present invention, the uni-material is preferably polyolefin, and the polyolefin is polyethylene (PE), polypropylene (　PP), polymethylpentene (PMP), polybutene-1 (polybutene-1). 1; PB-1), polyolefin elastomer (POE), polyolefin plastomer (POP), polyisobutylene (PIB), ethylene-propylene rubber (EPDM) However, it is not particularly limited as long as it is a type of polymer prepared by polymerization from olefin.

In addition, the uni-material of the present invention is characterized in that it is a polyolefin-based single regenerated resin or a polyolefin-based mixed regenerated resin in which a polyolefin-based single regenerated resin and a polyolefin-based new material resin are mixed. The recycled resin is polyethylene (PE), polypropylene (PP), polymethylpentene (PMP), polybutene-1 (PB-1), polyolefin elastomer (POE), It may be a recycled resin composed of any one selected from the group consisting of polyolefin plastomer (POP), polyisobutylene (PIB), and ethylene-propylene rubber (EPDM), or polyethylene (PE), polypropylene (　PP), polymethylpentene (PMP), polybutene-1 (PB-1), polyolefin elastomer (POE), polyolefin plastic It may be a regenerated resin composed of at least one selected from the group consisting of polyolefin (plastomer; POP), polyisobutylene (PIB), and ethylene-propylene rubber (EPDM).

The multi-layer plastic barrier film of the present invention is characterized by including the uni-material, and may have a multi-layer structure composed of two or more layers. In the multi-layer plastic barrier film of the present invention, at least one of at least two layers is made of a uni-material. This was schematized and shown in FIGS. 1 to 10. 1 to 10, the polyolefin-based new resin layer 100 means a layer purely composed of a polyolefin-based new resin composition, and the polyolefin-based single recycled resin layer 200 is a layer purely composed of a polyolefin-based recycled resin composition. It means, the polyolefin-based mixed regenerated resin layer 300 means a layer composed of a composition in which a new polyolefin-based regenerated resin and a polyolefin-based regenerated resin are mixed, and the coating layer 400 refers to a layer composed of a coating composition. 1 and 2 show a multilayer plastic barrier film composed of two layers, one of which is a single polyolefin-based regenerated resin layer 200 or a polyolefin-based mixed regenerated resin layer 300, and the other is a coating layer (400). 3 and 4 show a multilayer plastic barrier film made of three or more layers, and any one or more of the three layers is a single polyolefin-based regenerated resin layer 200 or a polyolefin-based mixed regenerated resin layer 300, which One is the coating layer 400, characterized in that the coating layer 400 is exposed to the outside by being disposed on the top or bottom of the multi-layer plastic barrier film. 5 and 6 show a multi-layer plastic barrier film made of three or more layers, and any one or more of the three layers is a single polyolefin-based regenerated resin layer 200 or a polyolefin-based mixed regenerated resin layer 300, which One is the coating layer 400, and the coating layer 400 is disposed inside the multilayer plastic barrier film and is not exposed to the outside. 7 and 8 show a multi-layer plastic barrier film made of four or more layers, and polyolefin-based new resin layers 100 are disposed on top and bottom of the multi-layer plastic barrier film, and a single polyolefin-based recycled resin layer 200 , and the coating layer 400 is disposed inside and is not exposed to the outside. 9 and 10 show a multi-layer plastic barrier film made of five or more layers, and polyolefin-based new resin layers 100 are disposed on top and bottom of the multi-layer plastic barrier film, and a single polyolefin-based recycled resin layer 200 , And the coating layer 400 is disposed inside and is not exposed to the outside, and a polyolefin-based new resin layer 100 is additionally disposed between the polyolefin-based single recycled resin layer 200 and the coating layer 400. Characterized in that.

Since the multi-layer plastic barrier film of the present invention is composed of a multi-layer film, it is possible to suppress the deterioration of mechanical properties due to the use of recycled resin and to diversify the composition. In addition, there are choices such as including an antistatic agent to reduce and suppress the generation of static electricity in the multi-layer film, or configuring the outer layer exposed to the outside with a single layer of polyolefin resin harmless to food to protect the product when used as a food packaging material. possible. At this time, the polyolefin-based resin alone layer may be a polyolefin-based new recycled resin layer 100, a polyolefin-based single recycled resin layer 200, or a polyolefin-based mixed recycled resin layer 300. The antistatic agent may be one or more selected from the group consisting of permanent antistatic polymers, derivatives of permanent antistatic polymers, and copolymers of permanent antistatic polymers. The permanent antistatic polymer is an additive containing an antistatic material made of a metal salt, and when a surface grounding phenomenon occurs, ions present in the three-dimensional network autonomously move to the surface to suppress generation of static electricity. The permanent antistatic polymer may be a conductive polymer, and the conductive polymer is a polymer that conducts electricity while maintaining the light and easy-to-process advantage of the polymer, and examples thereof include polyacetylene, polyaniline, and polypyrrole. (polypyrrole), etc., but is not limited thereto.

The multi-layer plastic barrier film of the present invention may include a coating layer 400 therein, and another coextrusion layer may be laminated on top or bottom of the coating layer 400 to protect the coating layer 400. At this time, the layer co-extruded on the top or bottom of the coating layer 400 may be a polyolefin-based new resin layer 100, a polyolefin-based single recycled resin layer 200, or a polyolefin-based mixed recycled resin layer 300. When the multilayer plastic barrier film of the present invention is made of three or more layers, it is preferable that the coating layer 400 is disposed inside and not exposed to the outside. The multi-layer plastic barrier film of the present invention minimizes damage to the coating layer due to external impact or exposure by disposing the coating layer 400 therein, and has an effect of maintaining and preserving the antifouling-moisture barrier property for a long time. The coating layer 400 is eco-friendly and recyclable by using a water-based solvent.

In addition, the multilayer plastic barrier film of the present invention may be manufactured to have a thickness of 10 to 1,000 μm. More preferably, it may be made of 20 to 500 μm, more preferably, it may be made of 30 to 250 μm.

In another aspect of the present invention, a method for manufacturing a multi-layer plastic barrier film using an eco-friendly uni-material is provided. This was schematized and shown in FIGS. 11 to 12. 11 shows a process diagram for manufacturing the multilayer plastic barrier film of the present invention, which includes extrusion of a polyolefin (PO) film forming the inside of the film (S100) and extrusion process of the polyolefin film forming the outside of the film (S200) , a step of coating the antifouling-moisture barrier coating composition on the polyolefin film (S300), and a laminate lamination step of the coated inner polyolefin film and the outer polyolefin film (S400). In the manufacturing process of the multi-layer plastic barrier film, the layer including the polyolefin film may be a polyolefin-based new resin layer 100, a polyolefin-based single recycled resin layer 200, or a polyolefin-based mixed recycled resin layer 300. However, preferably, the multilayer plastic barrier film using the eco-friendly uni-material of the present invention is produced by co-extrusion of a new polyolefin resin and a single polyolefin regenerated resin or a polyolefin mixed regenerated resin. . The co-extrusion may be casting co-extrusion, or blown co-extrusion, and when produced by blown co-extrusion, specifically, air-cooled (Up-bottom) co-extrusion, or It may be water-cooled (Down-down) co-extrusion. 12 shows a process diagram for preparing a coating composition for performing a process of coating a polyolefin film with an antifouling-moisture barrier coating composition (S300) in the manufacturing process of the multilayer plastic barrier film. This is a first step of synthesizing an organic polymer mixture providing antifouling-moisture barrier properties (S310), a second step of mixing and stirring ethyl alcohol and distilled water (S320), stirring the mixture of the first step and the second step to coat It includes a third step of mixing the composition for mixing (S330), and a fourth step of stirring the aqueous barrier crosslinking agent immediately before the coating process (S300) (S340). Specifically, in the first step (S310) of synthesizing the organic polymer mixture providing the antifouling-moisture barrier property, at least one selected from the group consisting of polyacrylic acid, polyvinylamine, polyvinylpyridine, and polyvinyl alcohol is selected. It can be prepared by, and more specifically, it can be prepared by mixing polyvinyl alcohol, water-based polyester, and water-based polyurethane. In the second step (S320) of mixing and stirring the ethyl alcohol and distilled water, ethyl alcohol as the co-solvent may be replaced with at least one selected from the group consisting of methyl alcohol, isopropyl alcohol, propyl alcohol, and butyl alcohol, , but is not limited as long as it is a type of alcohol. At this time, alcohol and distilled water as a co-solvent are preferably mixed in an equal volume ratio of 1:1, but are not limited thereto. In the third step (S330) of mixing the coating composition by stirring the mixture of the first step and the mixture of the second step, 30% to 70% of the mixture of the first step and 70% to 30% of the mixture of the second step are mixed in a volume ratio. Preferably, 40% to 60% of the mixture in the first step and 60% to 40% of the mixture in the second step are mixed in a volume ratio, and 50% of the mixture in the first step and 50% of the mixture in the second step are mixed in a volume ratio of 60% to 40%. Mixing is more preferred. The first step (S310) to the third step (S330) of the manufacturing process of the antifouling-moisture barrier coating composition may be prepared by stirring at room temperature for 30 to 60 minutes. The fourth step (S340) of stirring the aqueous barrier crosslinking agent immediately before the coating process (S300) is characterized in that the composition and the aqueous barrier crosslinking agent of the third step (S330) are stirred for 3 to 5 minutes before the coating operation.

In another aspect of the present invention, a packaging material manufactured by including a multilayer plastic barrier film using an eco-friendly uni-material is provided.

The packaging material is characterized by excellent oxygen and moisture barrier properties. The packaging material may be a packaging material for packaging food or electronic materials, but is not limited thereto.

Polyolefin-based resins have versatility and high recyclability, but have limitations in oxygen and moisture barrier properties.

The present invention relates to a multilayer plastic barrier film using Uni-Material and a method for manufacturing the same, and the film of the present invention has excellent physical properties such as tensile strength, elongation, and abrasion resistance while improving oxygen and moisture barrier properties. It is maintained and has an eco-friendly effect.

1 is a cross-sectional view of a multilayer plastic barrier film composed of two layers according to an embodiment of the present invention, showing a case in which a single polyolefin-based regenerated resin layer 200 is included and a coating layer 400 is disposed to be exposed to the outside. .
2 is a cross-sectional view of a multilayer plastic barrier film composed of two layers according to an embodiment of the present invention, showing a case in which a polyolefin-based mixed regeneration resin layer 300 is included and the coating layer 400 is disposed to be exposed to the outside. .
3 is a cross-sectional view of a multilayer plastic barrier film made of three or more layers according to an embodiment of the present invention, in which a single polyolefin-based regenerated resin layer 200 is included and the coating layer 400 is disposed to be exposed to the outside. indicates
4 is a cross-sectional view of a multilayer plastic barrier film made of three or more layers according to an embodiment of the present invention, when a polyolefin-based mixed regeneration resin layer 300 is included and the coating layer 400 is disposed to be exposed to the outside. indicates
5 is a cross-sectional view of a multi-layer plastic barrier film made of three or more layers according to an embodiment of the present invention, showing a case in which a polyolefin-based single recycled resin layer 200 is included and a coating layer 400 is disposed inside. .
6 is a cross-sectional view of a multilayer plastic barrier film made of three or more layers according to an embodiment of the present invention, showing a case in which a polyolefin-based mixed regeneration resin layer 300 is included and a coating layer 400 is disposed inside. .
7 is a cross-sectional view of a multi-layer plastic barrier film made of four or more layers according to an embodiment of the present invention, wherein a polyolefin-based new resin layer 100 is disposed on top and bottom of the multi-layer plastic barrier film, and a single polyolefin-based resin layer 100 is disposed. It shows the case where the regeneration resin layer 200 and the coating layer 400 are disposed inside.
8 is a cross-sectional view of a multi-layer plastic barrier film made of four or more layers according to an embodiment of the present invention, wherein a polyolefin-based new resin layer 100 is disposed on the top and bottom of the multi-layer plastic barrier film, and the polyolefin-based mixture It shows the case where the regeneration resin layer 300 and the coating layer 400 are disposed inside.
9 is a cross-sectional view of a multi-layer plastic barrier film made of five or more layers according to an embodiment of the present invention, wherein a polyolefin-based new resin layer 100 is disposed on the top and bottom of the multi-layer plastic barrier film, and a single polyolefin-based resin layer 100 is disposed. The reclaimed resin layer 200 and the coating layer 400 are disposed inside, and the polyolefin-based new resin layer 100 is additionally disposed between the single reclaimed polyolefin resin layer 200 and the coating layer 400.
10 is a cross-sectional view of a multi-layer plastic barrier film made of five or more layers according to an embodiment of the present invention, wherein a polyolefin-based new resin layer 100 is disposed on the top and bottom of the multi-layer plastic barrier film, and the polyolefin-based mixture The recycled resin layer 300 and the coating layer 400 are disposed inside, and the polyolefin-based new material resin layer 100 is additionally disposed between the polyolefin-based mixed recycled resin layer 300 and the coating layer 400.
11 is a process chart showing a manufacturing process (S100 to S400) of a multi-layer plastic barrier film according to an embodiment of the present invention.
12 is a process chart showing a manufacturing process (S310 to S340) of a coating composition included in a multilayer plastic barrier film according to an embodiment of the present invention.

Hereinafter, the present invention will be described in more detail through examples. These examples are only for explaining the present invention in more detail, and it will be apparent to those skilled in the art that the scope of the present invention is not limited by these examples according to the gist of the present invention. .

In the embodiment of the present invention, by laminating a polyolefin-based single material resin, which is a uni-material with excellent recyclability, and a coating adhesive layer with excellent barrier properties, a multi-layer plastic that is easy to heat bond and has excellent adhesive strength while sufficiently securing oxygen and moisture barrier properties. A barrier film was prepared. In addition, since the packaging material using the multilayer plastic barrier film prepared in the embodiment of the present invention is mixed with recycled resin, it has excellent eco-friendliness and carbon reduction effect while maintaining the versatility of the existing film packaging material.

Hereinafter, the multilayer plastic barrier film of the present invention will be described in detail step by step based on examples.

Example 1. Manufacture of multi-layer plastic barrier film using eco-friendly uni-material

A three-layer plastic barrier film was prepared by co-extruding the polyolefin-based new resin layer 100, the polyolefin-based single recycled resin layer 200, the polyolefin-based mixed recycled resin layer 300, and the another coating layer 400 (FIG. 5 and FIG. see 6). Specifically, the polyolefin-based resin used polyethylene (broad orthogonal comonomer distribution polyethylene; BOCD PE) having a wide molecular weight distribution, and the top (first layer) and bottom (third layer) were composed of a polyolefin-based new resin layer (100) In this case, the polyethylene composition was used by mixing 90% by volume of linear low density polyethylene (LLDPE) and 10% by volume of low density polyethylene (LDPE). When either of the upper (first layer) and lower (third layer) is composed of the polyolefin-based single recycled resin layer 200, 50 vol% of LLDPE and 50 vol% of polyolefin-based single recycled resin (RECYCLED PE) are mixed used In general, LLDPE is used as a raw material for various industrial packaging materials, food packaging materials, and tarpaulin coatings because of its excellent strength and processability, optical properties, and environmental stress (resistance to unstable cracks occurring during molding of plastic products), but it is expensive. Therefore, the industry is devising ways to maintain physical properties such as strength, processability, optical properties, and environmental stress while reducing the LLDPE content. Conversely, in general, recycled resins have weak strength compared to new resins of the same polymer type. A coating layer 400 was disposed between the top (first layer) and bottom (third layer) of the multilayer plastic barrier film of the present invention. By placing the coating layer 400 on the second layer, a method was developed to reduce the LLDPE content and maintain physical properties such as strength, processability, optical properties, and environmental stress while including recycled resin. The coating layer 400 is prepared by stirring 85% of polyvinyl alcohol, 15% of water-based polyester, and 5% of water-based polyurethane in a volume ratio in a first step (S310), and in a second step, 50% of ethyl alcohol and 50% of distilled water in a volume ratio After stirring (S320), in 3 steps, 50% of the composition in step 1 and 50% of the composition in step 2 are stirred for 30 to 60 minutes in a volume ratio (S330), and in step 4, the composition in step 3 has aqueous barrier properties. It was prepared by stirring the crosslinking agent at less than 5% by weight for 3 to 5 minutes (S340). The above 4 steps were performed before the coating operation.

In addition, when the coating layer is formed, the surface may be oxidized by corona discharge treatment. The multi-layer plastic barrier film of the present invention includes the coating layer inside the film as described above, thereby blocking the risk of the coating agent contacting the package (food) and entering the human body when the packaging material is manufactured with the film, and increasing packaging stability. has the effect of

The prepared film was 20 μm or 25 μm, and the width of the film was unified to 900 mm.

Example 2. Confirmation of physical properties of the prepared multilayer plastic barrier film

The thickness, tensile strength, elongation, and initial tear of the multilayer plastic barrier film prepared in Example 1 were measured, and the results are shown in Table 1 below. The thickness was measured according to KS M ISO 7214 standard. Tensile strength is measured based on ASTM D-882-83, but using QM100S-20 from Qmersys, take 9 test pieces in the MD/TD direction for each sample, measure them, and subtract the maximum and minimum values from the 7 average values described. The elongation was measured according to ASTM D-882-83 Method A, but the specific measuring equipment and method were carried out in the same way as the tensile strength measurement. Abrasion resistance was measured according to ASTM D 257, and Agilent's Agilent-4339B was used as the equipment.

division standard manufacturing example LLD 90%+LD 10% LLDs 50%
+RECYCLED 50% thickness 20㎛ 25㎛ 20㎛ 25㎛ 20㎛ 25㎛ Tensile Strength (MD), N/cm² 2,250
more 1,960
more 5,630 5,795 6,220 6,260 Elongation (MD), % over 300 over 300 475 505 333 358 Initial Tear (MD), N/cm (normal) 640 or more 640 or more 1,130 1,275 1,063 1,070

As a result of the test, the multilayer plastic barrier film of the present invention containing the polyolefin-based regenerated resin exceeded the KS standard in all items of tensile strength, elongation, and abrasion resistance, and exhibited excellent physical properties. Compared to the multilayer plastic barrier film prepared with the composition LLD 90% + LD10%, the tensile strength was rather increased even though the content of linear low density polyethylene (LLD) was reduced by about 45%. The increase in tensile strength and the decrease in elongation may act as factors to enhance the stability of the film or packaging material including the film by preventing excessive stretching. In addition, the abrasion resistance of the film containing the recycled resin was found to be reduced compared to the LLD 90% + LD10% film, indicating that it could be more easily decomposed.

Having described specific parts of the present invention in detail above, it is clear that these specific techniques are only preferred embodiments for those skilled in the art, and the scope of the present invention is not limited thereto. Accordingly, the substantial scope of the present invention will be defined by the appended claims and equivalents thereof.

100: polyolefin-based new material resin layer
200: polyolefin-based single regeneration resin layer
300: polyolefin mixed regeneration resin layer
400: coating layer
S100: Extrusion process of polyolefin (PO) film forming the inside of the multilayer plastic barrier film manufacturing process
S200: Extrusion process of polyolefin film forming the outer side of the multilayer plastic barrier film manufacturing process
S300: Process of coating a polyolefin film with an antifouling-moisture barrier coating composition during the multilayer plastic barrier film manufacturing process
S310: A first-step process of synthesizing an organic polymer mixture providing antifouling-moisture barrier properties during the coating composition manufacturing process for performing S300
S320: A two-step process of mixing and stirring ethyl alcohol and distilled water during the coating composition manufacturing process for performing S300
S330: A three-step process of mixing the coating composition by stirring the mixture of the first step and the second step during the manufacturing process of the coating composition for performing S300
S340: 4-step process of stirring the aqueous barrier crosslinking agent immediately before the coating process (S300) in the coating composition manufacturing process for performing S300
S400: Lamination process of coated inner polyolefin film and outer polyolefin film during multilayer plastic barrier film manufacturing process

Claims (10)

(a) preparing a film composed of a polyolefin resin;
(b) preparing a film containing a composition for coating; and,
(c) preparing a multi-layer film by laminating the film of (a) and the film of (b), as a method for producing a multi-layer plastic barrier film,
The multilayer plastic barrier film is a multilayer film composed of three or more layers,
At least one layer of the multi-layer is composed of a polyolefin-based mixed regenerated resin in which a polyolefin-based new material resin and a polyolefin-based regenerated resin are mixed,
The film containing the coating composition is disposed inside the multilayer plastic barrier film,
The coating composition is prepared by mixing polyvinyl alcohol, water-based polyester, water-based polyurethane, and a water-based barrier crosslinking agent, a manufacturing method.
According to claim 1,
The polyolefinic resin is at least one selected from the group consisting of polyethylene, polypropylene, polymethylpentene, polybutene-1, polyolefin elastomer, polyolefin plastomer, polyisobutylene, and ethylene propylene rubber, manufacturing method.
delete According to claim 1,
The coating composition,
(a) mixing polyvinyl alcohol, water-based polyester, and water-based polyurethane;
(B) mixing alcohol and distilled water;
(c) mixing 30% to 70% of the mixed solution of (a) and 70% to 30% of the mixed solution of (b) in a volume ratio; and,
(D) adding a water-based barrier crosslinking agent; to be prepared, including a manufacturing method.
delete A multilayer plastic barrier film comprising a film composed of a polyolefin resin and a film containing a coating composition,
The multilayer plastic barrier film is a multilayer film composed of three or more layers,
At least one layer of the multi-layer is composed of a polyolefin-based mixed regenerated resin in which a polyolefin-based new material resin and a polyolefin-based regenerated resin are mixed,
The film containing the coating composition is disposed inside the multilayer plastic barrier film,
The coating composition is a film comprising polyvinyl alcohol, aqueous polyester, aqueous polyurethane, and an aqueous barrier crosslinking agent.
According to claim 6,
The polyolefinic resin is at least one selected from the group consisting of polyethylene, polypropylene, polymethylpentene, polybutene-1, polyolefin elastomer, polyolefin plastomer, polyisobutylene, and ethylene propylene rubber, film.
delete A packaging material comprising the multilayer plastic barrier film of claim 6.
According to claim 9,
The packaging material is a packaging material for packaging of food or electronic materials.

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