KR102460102B1 - Eco-friendly packaging material and manufacturing method thereof - Google Patents

Abstract

The present invention relates to an eco-friendly packaging material harmless to a human body, and more specifically, to a completely harmless and eco-friendly material to the human body, which uses a packaging material composed of a film of the same material as a container, so that no environmental pollution is caused during a manufacturing process, and moisture or gas (oxygen) permeability barrier is increased, and the content is deteriorated. After use, the eco-friendly material can be recycled like the container.

Description

Eco-friendly packaging material and manufacturing method thereof

The present invention relates to an eco-friendly packaging material that is harmless to the human body, and more particularly, is an environmentally friendly material that is completely harmless to the human body. It relates to an eco-friendly packaging material that improves gas (oxygen) permeation barrier, minimizes deterioration of contents, and can be recycled like a container after use, harmless to the human body.

Most of the flexible packaging materials and printed films attached to the surface of bottles and plastic containers are made of vinyl and polymers such as PP (polypropylene), PE (polyethylene), and PET (polyethylene terephthalate), which are serious pollutants to the environment. However, there is no special alternative and it is still used today. Although many studies are being conducted to solve this problem, a clear product that can be applied to real life has not yet been developed.

Paper can be developed as the best alternative, but paper is weak to moisture or water, does not block gas, so the contents cannot be stored for a long time without deterioration. There is a hassle of having to apply and join. In addition, since corrugated cardboard, which is often used as a packaging material, becomes weak or brittle when it comes into contact with moisture and moisture, there is an inconvenience that requires attention during the transportation process and loading process (indoor loading), and above all, packaging the goods. In the process of transporting the product, it often causes packaging damage and product damage, resulting in troublesome work.

On the other hand, the surface material of the adhesive film used for indoor and outdoor advertising materials is mostly polyvinyl chloride (PVC), and this material uses a plasticizer such as dioctyl butarate (DOP) to give the film flexibility. The adhesive film containing the plasticizer as described above has a serious problem in that harmful substances such as hydrogen chloride and dioxin are discharged when incinerated and discarded. We are accelerating the development of materials. In addition, the material also has a problem of environmental pollution and destruction of nature because the period of decomposition in the natural environment when buried in soil is too long.

In order to improve this problem, biodegradable polymers and biodegradable polymers can be used as materials that can replace conventional materials. Here, the biodegradable polymer is a polymer that is decomposed by the action of natural microorganisms such as bacteria, fungi, and algae, and the biodegradable polymer refers to a polymer in which only the biodegradable polymer is selectively decomposed by mixing a biodegradable polymer and a non-degradable polymer. When it is difficult to apply biodegradable polymers due to the high price of biodegradable polymers, biodegradable polymers are often mixed with non-degradable polymers to control price and physical properties.

Attempts have been made to apply olefin resins such as polyethylene and polypropylene, but the resin has poor adhesion to the surface treatment agent that gives printability, and is completely decomposed into water and carbon dioxide within a short time to circulate in the natural world without pollution and for the human body. However, it is insufficient to achieve the purpose of biodegradability with harmless characteristics. In addition, material development is being made in the form of a mixture of biodegradable resins such as starch, polycaprolactone (PCL) and polylactic acid (PLA) with high molecular compounds such as polyvinyl chloride, polyethylene, polypropylene, and polystyrene, but this also However, it has not been commercialized because it does not meet the characteristics required in the packaging industry.

Therefore, since the biodegradable plastic mixed with the partially biodegradable resin as described above cannot be said to be a complete solution in terms of environmental preservation, it is necessary to develop a material that can replace it.

Accordingly, the present inventors have described the inconvenience of using existing paper products caused by the disadvantages of being vulnerable to moisture and water and weak strength, the inconvenience of applying a separate adhesive and sealing in the sealing process, and above all, moisture and gas (oxygen). ) In order to solve the problems of storing the contents for a long time so that they do not deteriorate as much as possible by minimizing the permeation block, as a result of diligent efforts, the paper is coated/laminated so that there is no harm to the human body and environmental pollution is not caused, moisture and gas (oxygen) By minimizing permeation and sealing by compression heating, it solves the inconvenience of using existing paper products, and at the same time has excellent moisture-proof/water-proof function, easy printing, and strong heat sealing by itself. It was confirmed that a paper packaging material, a flexible packaging material, and a resin film with a container having properties can be manufactured, and the present invention has been completed.

If we explain the above in more detail, it is environmentally friendly to manufacture packaging materials that are harmless to the human body, have excellent gas (oxygen) permeation barrier, self-seal by compression heating, and easily adhere to containers, resulting in environmental pollution. In addition, the label used for various containers can be applied with the same material as the container, and some of the container lid and packaging materials are applied with the same material as the container. It is made of the same material so that it can be recycled as it is without separating the container and container lid, and the container and label separately.

Republic of Korea Patent No. 10-2155614 Republic of Korea Patent Registration No. 10-2244864

The purpose of the present invention is to replace various environmentally harmful packaging materials used in the past with eco-friendly packaging materials that are harmless to the human body. In order to provide eco-friendly packaging materials that are easy to use, do not tear the packaging material, do not get wet, etc.) and required characteristics (strong bonding strength, sealability, oxygen permeability barrier, etc.) have.

In order to achieve the above object, the present invention provides (i) paper; And (ii) the (i) provides an eco-friendly packaging material comprising a PVA (poly vinyl alcohol) film layer formed on the upper surface of the paper.

The present invention also provides: (i) paper; (ii) PLA (Poly Lactic Acid), PBAT (Polybutylene Adipate-co-Terephthalate), PBS (Polybutylene Succinate), EVOH (Ethylene Vinyl Alcohol), EVA (Ethylene Vinyl Acetate) and HMF formed on the top surface of the (i) paper (Hot Melt Film) at least one film layer selected from the group consisting of; And (iii) the (i) provides an eco-friendly packaging material comprising a PVA film layer formed on the lower surface of the paper.

In the present invention, (iv) at least one film layer selected from the group consisting of PLA, PBAT, PBS, EVOH, EVA, PVA, HMF and PA (Poly Amide) formed on the lower surface of the (ii) PVA film layer is added. It is preferable to include

In the present invention, (iv') further comprising at least one film layer selected from the group consisting of PLA, PBAT, PBS, EVOH, EVA, PVA, HMF and PA formed on the lower surface of the (iii) film layer desirable.

In the present invention, (v) the (iv) film layer is at least one selected from the group consisting of PLA, PBAT, PBS, EVOH, EVA and PVA, and (iv) EVA, PA formed on the lower surface of the film layer, It is preferable to further include an HMF film layer or an adhesive layer.

In the present invention, (v') the (iv') film layer is at least one selected from the group consisting of PLA, PBAT, PBS, EVOH, EVA and PVA, and (iv') EVA formed on the lower surface of the film layer , PA, it is preferable to further include an HMF film layer or an adhesive layer.

In the present invention, (v'') at least one film layer selected from the group consisting of OPP (Oriented polypropylene), CPP (Casting polypropylene) and PE (Polyethylene) on the lower surface of the (iv') film layer; And it is preferable to further include at least one film layer or adhesive layer selected from the group consisting of PA, HMF and EVA on the lower surface of the (v'') film layer.

The present invention provides (a) at least one film layer selected from the group consisting of OPP, CPP and PE; And (b) (a) provides an eco-friendly packaging material comprising at least one film layer or adhesive layer selected from the group consisting of PA, HMF and EVA formed on the opposite side of the adhesive surface of the container of the film layer.

The present invention is (a-1) a film layer for PP or PE label; (b-1) a printed layer formed on the lower surface of the (a-1) film layer; (c-1) at least one coating layer or PVA film layer selected from the group consisting of PVA and AAE (Acrylic acid emulsion) formed on the lower surface of the (b-1) printing layer; And (d-1) (c-1) provides an eco-friendly packaging material comprising at least one film layer or adhesive layer selected from the group consisting of EVA, PA and HMF formed on the lower surface of the film layer.

The present invention is (a-2) a film layer for PP or PE label; (b-2) at least one coating layer or PVA film layer selected from the group consisting of PVA and AAE formed on the lower surface of the (a-2) film layer; (c-2) a printed layer formed on the lower surface of the (b-2) film layer; And (d-2) provides an eco-friendly packaging material comprising at least one film layer or adhesive layer selected from the group consisting of EVA, PA and HMF formed on the lower surface of the (c-2) printing layer.

The present invention comprises the steps of: (a) laminating one or more films selected from the group consisting of PLA, PBAT, PBS, EVOH, EVA and HMF on the upper surface of the paper to form a film layer; (b) laminating a PVA film on the lower surface of the paper or coating a PVA solution to form a PVA layer; (c) forming a film layer by laminating one or more films selected from the group consisting of PLA, PBAT, PBS, EVOH, EVA and HMF on the lower surface of the PVA film layer; and (d) laminating one or more films selected from the group consisting of EVA, PA and HMF, which are heat-bonded by compression with a container, on the lower surface of the film layer of (c), or coating a sealant adhesive that adheres to the container. It provides a method for manufacturing an eco-friendly packaging material comprising the.

The present invention comprises the steps of (a) coating a PVA solution on the upper surface of the paper to form a PVA coating layer; (b) forming a film layer by laminating one or more films selected from the group consisting of PLA, PBAT, PBS, EVOH, EVA, PVA, HMF and PA on the lower surface of the PVA coating layer; and (c) laminating at least one film selected from the group consisting of EVA, PA and HMF, which is heat-bonded by compression with the container, on the lower surface of the film layer of (b), or coating a sealant adhesive that adheres to the container. It provides a method for manufacturing an eco-friendly packaging material comprising the.

The present invention is a method for laminating or adhesive coating one or more films selected from the group consisting of PA, HMF and EVA films on the opposite side of the container adhesive surface of one or more film layers selected from the group consisting of PP, OPP, CPP and PE. It provides a method for manufacturing an eco-friendly packaging material comprising the steps.

The present invention comprises the steps of (a) forming a printed layer on the lower surface of the film layer for PP or PE label; (b) coating the lower surface of the printed layer of (a) with a solution containing at least one selected from the group consisting of PVA and AAE or laminating with a PVA film to form a film layer; and (c) laminating one or more films selected from the group consisting of EVA, PA and HMF on the lower surface of the film layer of (b) or coating with an adhesive.

The present invention comprises the steps of (a) coating the lower surface of the film layer for PP or PE label with a solution containing at least one selected from the group consisting of PVA and AAE, or laminating with a PVA film to form a film layer; (b) forming a printed layer on the lower surface of the film layer of (a); and (c) laminating one or more films selected from the group consisting of EVA, PA and HMF on the lower surface of the printed layer of (b) or coating with an adhesive.

The eco-friendly packaging material according to the present invention is intended to replace various environmentally harmful packaging materials used in the past with eco-friendly packaging materials that are harmless to the human body. , the packaging material is not torn, does not get wet, etc.) and required properties (strong bonding strength, sealing property, oxygen permeability barrier, etc.)

The present invention is a packaging material to which paper is applied, which has the effect of improving the inconvenience of using paper products caused by the disadvantages of being vulnerable to moisture and water and weak strength, and sealing by compression heating method. It has the effect of eliminating the hassle of applying a separate adhesive and sealing in the process, and it has the effect of increasing the ease of printing by not being constrained by water-based or oil-based printing by allowing pre-printing on paper. By increasing the gas (oxygen) permeation barrier, the contents can be stored for a long period of time so that they do not deteriorate for a long period of time. Packaging materials can be recycled as film and paper are separated when placed in water.

As a packaging material designed by grafting film and paper of the same material as the container, the paper part and the film part can be separated. It has the effect of allowing it to be recycled as it is, just like a container.

In addition, when the paper part is separated when in use, a hole for using a straw comes out to facilitate drink intake, and even if the content is not a drink, after separating the paper part, the film part is After ingesting the contents by allowing only a part of the container to be attached and removed, the container to which the film of the same material is attached can be easily recycled together with the attached film, thereby preventing environmental pollution.

In addition, the film of the same material as the container is sealed with the container without applying paper, leaving only a part of the film, and then the contents can be ingested. After use, the film attached to the container can be recycled together with the container. It has the effect of making it easier to recycle and has the effect of packaging at a low price and facilitating recycling.

In addition, after printing on a film of the same material as a container, coating a solution containing at least one of PVA or AAE on it, or laminating a PVA film, , it has the effect of allowing the printing layer to be erased (which often occurs due to the adhesive solvent), and has the effect of minimizing the deterioration of the contents by increasing the moisture or gas (oxygen) permeation barrier property, and this also has the same effect as the container. It has the effect of being able to recycle like a container after use by applying a film of a material.

1a to 1c show ⓐ of <A> in <Table 2>, ⓑ of <A>, ⓐ of <B>, ⓑ of <B>, ⓐ of <C>, < It is a schematic diagram showing the ⓑ shape of C>.
Figure 2 is in ⓐ of <B> of <Table 1> according to an embodiment of the present invention, paper parts and film parts separation, when paper parts separation, the appearance of a hole (hole) that can use a straw, and a container It is a schematic diagram explaining that the contents can be ingested by separating the film parts from the
3 shows a solution coating process according to an embodiment of the present invention.
4 shows a lamination process according to an embodiment of the present invention.
5 shows paper, film, coating solution, container, etc. used in an embodiment of the present invention.
Figure 6 shows a paper (kraft paper 30gsm) coated with a 6% PVA aqueous solution according to an embodiment of the present invention.
7 is a printed paper (kraft paper 30gsm) according to an embodiment of the present invention, on the printed side, a PBAT film (thickness 20㎛) is laminated at 140°C, and a PVA film with a thickness of 40㎛ on the opposite side is 180 Lamination at ℃, PBAT film (thickness 20㎛) laminated on this at 140 ℃, it shows that the EVA film with a thickness of 40㎛ was laminated at 70 ℃ (from Figure 7, '‥' (dotted line) is solution coating , '_' (solid line) indicates film lamination, that is, in FIG.
8 is a printed paper (kraft paper 30 gsm) according to an embodiment of the present invention, on the printed side, a PLA film with a thickness of 20 μm is laminated at 130 to 150° C., and a 6% PVA aqueous solution is coated on the opposite side and , shows that a 50 μm thick HMF film is laminated at 60 to 80 ° C.
FIG. 9 shows that the packaging material prepared as in FIG. 7 was pressed and heated at 120 to 150° C. and applied to the PP container lid packaging.
10 shows the PBAT-paper-PVA-PBAT-EVA packaging material prepared in ⓐ of <A> of <Table 2> according to an embodiment of the present invention.
11 shows the PLA-paper ... PVA-HMF packaging material manufactured in ⓑ of <A> of <Table 2> according to an embodiment of the present invention.
ⓐ of FIG. 12 shows that PBAT-paper-PVA-PBAT-EVA in ⓐ of <A> of <Table 2> according to an embodiment of the present invention is pressed and heated to a PP container, and ⓑ is <Table 2> In ⓑ of <A> of >, PLA-PVA...paper...PVA-HMF was pressed and heated to a PP container.
13 is a view showing that the lid of the packaging material of FIG. 12 ⓑ was removed and placed in water.
14 shows that the paper and the film are separated from the paper in FIG. 13 placed in water, and the separation time varies greatly depending on the temperature of the water with and without stirring. Time separates much faster. However, even when not stirred in cold water, it is separated within a few hours.
15 shows the measurement results of gas (oxygen) permeation barrier properties of PBAT-paper-PVA-PBAT-EVA in ⓐ of <A> of <Table 2> according to an embodiment of the present invention.
16 is a PBAT-paper-PVA-PBAT-EVA in ⓐ of <A> of <Table 2> in accordance with an embodiment of the present invention and PLA-paper in ⓑ of <A> When the packaging material of PVA-HMF is torn off , indicates that it falls cleanly without leaving any residue on the rim of the container.
17 shows that PBAT-paper-PBAT-EVA-OPP-EVA is pressed and heated in ⓐ of <B> of Table 1 according to an embodiment of the present invention.
18 is a PBAT-paper-PBAT-EVA-OPP-EVA in ⓐ of <B> of Table 1 according to an embodiment of the present invention. -When the paper-PBAT-EVA) is removed, a hole for inserting a straw appears in the OPP film part (OPP-EVA) attached to the container, and the paper part and OPP part are well separated.
FIG. 19 shows that the OPP film part remaining after removing the paper part in FIG. 17 is well sealed to the container.
20 is a photograph when the OPP film part remaining after removing the paper part in FIG. 17 is removed from the container, showing that foreign substances do not remain on the container edge bonding surface and fall neatly and cleanly.
21 is a view showing that OPP-EVA in ⓑ of <B> of Table 1 according to an embodiment of the present invention is heated in a PP container at 120 ~ 150 ℃ the printed layer.
22 is an example of printing on an OPP film in ⓐ of <C> of <Table 2> according to an embodiment of the present invention, coating an AAE solution thereon, and applying a sealant adhesive thereon.
23 shows that the label of FIG. 22 is attached to a PP container and placed in water.
FIG. 24 shows the measurement results of gas (oxygen) permeation barrier properties of FIG. 22 .

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In general, the nomenclature used herein is that of the printed layer well known and commonly used.

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

According to the present invention, when the eco-friendly packaging material of the structure shown in <A> of FIG. 1 is applied to paper, it is vulnerable to moisture and water, and the inconvenience of using paper products caused by weak strength is improved, By sealing by compression heating method, it not only eliminates the hassle of applying a separate adhesive and sealing during the sealing process, but also increases the ease of printing by enabling pre-printing on paper, and reduces moisture or gas (oxygen) By increasing the permeation barrier properties, the contents can be stored for a long period of time so that they do not deteriorate for a long period of time, so that they have a performance that exceeds the existing packaging materials. It was confirmed that environmental pollution was not induced at all during the manufacturing process.

Accordingly, the present invention in one aspect (i) paper; and (ii) the (i) PVA film layer formed on the upper surface of the paper.

The present invention in another aspect (i) paper; (ii) at least one film layer selected from the group consisting of PLA, PBAT, PBS, EVOH, EVA and HMF formed on the top surface of the (i) paper; and (iii) the (i) PVA film layer formed on the lower surface of the paper.

In the present invention, (i) paper; and (ii) the (i) PVA film layer formed on the upper surface of the paper; (iv) (ii) relates to an eco-friendly packaging material comprising at least one film layer selected from the group consisting of PLA, PBAT, PBS, EVOH, EVA, PVA, HMF and PA formed on the lower surface of the PVA film layer, the structure corresponds to the ⓐ - ⓑ - ⓓ structure in Table 1.

In the present invention, (i) paper; (ii) at least one film layer selected from the group consisting of PLA, PBAT, PBS, EVOH, EVA and HMF formed on the top surface of the (i) paper; and (iii) the (i) PVA film layer formed on the lower surface of the paper; (iv') relates to an eco-friendly packaging material comprising at least one film layer selected from the group consisting of PLA, PBAT, PBS, EVOH, PVA, EVA, HMF and PA formed on the lower surface of the (iii) film layer, the structure corresponds to the ⓐ - ⓑ - ⓒ - ⓓ structure in Table 1.

In the present invention, (i) paper; (ii) at least one film layer selected from the group consisting of PLA, PBAT, PBS, EVOH, EVA and HMF formed on the top surface of the (i) paper; and (iii) the (i) PVA film layer formed on the lower surface of the paper; (iv') at least one film layer selected from the group consisting of PLA, PBAT, PBS, EVOH, EVA and PA formed on the lower surface of the (iii) film layer; And (v') relates to an eco-friendly packaging material comprising at least one film layer or adhesive layer selected from the group consisting of EVA, PA and HMF formed on the lower surface of the (iv') film layer, the structure of which is ⓐ in Table 1 - ⓑ - ⓒ - ⓓ - corresponds to the ⓔ structure.

In most cases, the adhesive applied to the present invention is a sealant adhesive. The main component is silicone and is excellent in adhesion, weather resistance and durability, the main component is acrylic and has strong adhesion, and the main component is butyl rubber and has elasticity, Butyl sealant with excellent adhesion, water resistance and airtightness, and urethane sealant with excellent elasticity, UV resistance, and weather resistance, whose main component is urethane, can be applied.

In the present invention, (i) paper; (ii) at least one film layer selected from the group consisting of PLA, PBAT, PBS, EVOH, EVA and HMF formed on the top surface of the (i) paper; and (iii) the (i) PVA film layer formed on the lower surface of the paper; (iv') at least one film layer selected from the group consisting of PLA, PBAT, PBS, EVOH, EVA and PA formed on the lower surface of the (iii) film layer; (v'') at least one film layer selected from the group consisting of PP, OPP, CPP and PE on the lower surface of the (iv') film layer; And (v'') relates to an eco-friendly packaging material comprising at least one film layer or adhesive layer selected from the group consisting of PA, HMF and EVA on the lower surface of the film layer, the structure of which is ⓐ - ⓑ - ⓒ in Table 1 - ⓓ - ⓔ - corresponds to the ⓕ structure.

According to the present invention, when the eco-friendly packaging material of the structure shown in <B>-ⓐ and <B>-ⓑ of FIG. 1 is applied to the cup container lid, when in use, the paper part of the lid packaging material attached to the container is removed. , the packaging material is easily separated, and a hole for inserting a straw comes out, so you can drink a drink by inserting a straw. Therefore, it was confirmed that it can be recycled as it is like a container.

Another aspect of the present invention is that (i) paper; and (ii) the (i) PVA film layer formed on the upper surface of the paper; (iv) at least one film layer selected from the group consisting of PLA, PBAT, PBS, EVOH and PVA formed on the lower surface of the (ii) PVA film layer and (iv) EVA, PA and HMF formed on the lower surface of the film layer It relates to an eco-friendly packaging material comprising at least one film layer or an adhesive layer selected from the group consisting of, the structure corresponds to the ⓐ - ⓑ - ⓓ - ⓔ structure in Table 1.

Further, another aspect of the present invention is (i) paper; (ii) at least one film layer selected from the group consisting of PLA, PBAT, PBS, EVOH, EVA and HMF formed on the top surface of the (i) paper; and (iii) the (i) PVA film layer formed on the lower surface of the paper; (iv') at least one film layer selected from the group consisting of PLA, PBAT, PBS, EVOH, PVA, EVA, HMF and PA formed on the lower surface of the (iii) film layer; (v'') at least one film layer selected from the group consisting of OPP, CPP and PE on the lower surface of the (iv') film layer; And (v'') relates to an eco-friendly packaging material comprising at least one film layer or adhesive layer selected from the group consisting of PA, HMF and EVA on the lower surface of the film layer, the structure of which is ⓐ - ⓑ - ⓒ in Table 1 - ⓓ - ⓔ - corresponds to the ⓕ structure.

In the present invention, the same adhesive as the adhesive described above is applied as the adhesive.

In the present invention, the CPP (Casting Polypropylene) film is mostly made by heating and melting PP (polypropylene) resin in the form of granules, and through a die (the die is 'T' type, so it is called T-Die) It refers to a film produced by being cast on a cooling roller with a smooth surface and quickly cooled into a film. ) is used to extrude, and in this process, it is stretched (stretched) to change the properties. At this time, stretching in one axial direction is called uniaxial stretching, stretching in two axial directions is called biaxial stretching, and depending on the presence or absence of stretching, CPP (non-stretching) and OPP (stretching) are called.

According to the present invention, the eco-friendly packaging material of the structure shown in <C> of FIG. 1 is applied to the container, and the film is printed on the same material as the container. It was confirmed that the permeation barrier property was increased, the deterioration of the contents was minimized, and after use, it could be recycled like a container.

Therefore, the present invention in another aspect (a-1) a film layer for PP or PE label; (b-1) a printed layer formed on the lower surface of the (a-1) film layer; (c-1) at least one coating layer or PVA film layer selected from the group consisting of PVA and AAE formed on the lower surface of the (b-1) printing layer; And (d-1) (c-1) relates to an eco-friendly packaging material comprising at least one film layer or adhesive layer selected from the group consisting of EVA, PA and HMF formed on the lower surface of the film layer.

In the present invention, the printed layer generally refers to all layers printed for advertising or explanation purposes.

In addition, the present invention from another viewpoint (a-2) a film layer for PP or PE label; (b-2) at least one coating layer or PVA film layer selected from the group consisting of PVA and AAE formed on the lower surface of the (a-2) film layer; (c-2) a printed layer formed on the lower surface of the (b-2) film layer; And (d-2) (c-2) relates to an eco-friendly packaging material comprising at least one film layer or adhesive layer selected from the group consisting of EVA, PA and HMF formed on the lower surface of the printing layer.

In another aspect, the present invention comprises the steps of: (a) laminating one or more films selected from the group consisting of PLA, PBAT, PBS, EVOH, EVA and HMF on the upper surface of the paper to form a film layer; (b) laminating a PVA film on the lower surface of the paper or coating a PVA solution to form a PVA film layer; (c) forming a film layer by laminating one or more films selected from the group consisting of PLA, PBAT, PBS, EVOH, EVA and HMF on the lower surface of the PVA film layer; and (d) laminating one or more films selected from the group consisting of EVA, PA and HMF, which are heat-bonded by compression with a container, on the lower surface of the film layer of (c), or coating a sealant adhesive that adheres to the container. It relates to a manufacturing method of an eco-friendly packaging material, including, a manufacturing method of an eco-friendly packaging material corresponding to the structure <A> ⓐ - ⓑ - ⓒ - ⓓ - ⓔ in Table 1.

In another aspect, the present invention comprises the steps of: (a) coating a PVA solution on the upper surface of a paper to form a PVA film layer; (b) forming a film layer by laminating one or more films selected from the group consisting of PLA, PBAT, PBS, EVOH, EVA, PVA, HMF and PA on the lower surface of the PVA film layer; and (c) laminating at least one film selected from the group consisting of EVA, PA and HMF, which is heat-bonded by compression with the container, on the lower surface of the film layer of (b), or coating a sealant adhesive that adheres to the container. It relates to a manufacturing method of an eco-friendly packaging material, including, a manufacturing method of an eco-friendly packaging material corresponding to the <B>-ⓐ structure in Table 1.

In another aspect, the present invention laminates one or more films selected from the group consisting of PA, HMF and EVA films on the opposite side of the container adhesive surface of the one or more film layers selected from the group consisting of PP, OPP, CPP and PE. It relates to the manufacturing method of the eco-friendly packaging material of claim 8, including the step of or adhesive coating, and is a manufacturing method of the eco-friendly packaging material corresponding to the <B>-ⓑ structure in Table 1.

In another aspect, the present invention comprises the steps of: (a) forming a printed layer on the lower surface of the film layer for a PP or PE label; (b) coating the lower surface of the printed layer of (a) with a solution containing at least one selected from the group consisting of PVA and AAE or laminating with a PVA film to form a film layer; and (c) laminating one or more films selected from the group consisting of EVA, PA and HMF on the lower surface of the film layer of (b) or coating with an adhesive,

(a) coating the lower surface of the film layer for PP or PE label with a solution containing at least one selected from the group consisting of PVA and AAE or laminating with a PVA film to form a film layer; (b) forming a printed layer on the lower surface of the film layer of (a); and (c) laminating one or more films selected from the group consisting of EVA, PA and HMF on the lower surface of the printed layer of (b) or coating with an adhesive, Table 1 <C> in <C> is a manufacturing method of an eco-friendly packaging material.

Preferred embodiments of the eco-friendly packaging material according to the present invention are as follows, and will be described in detail in Table 1.

division ⓐ ⓑ ⓒ ⓓ ⓔ ⓕ <A> Lamination of one or more of PVA solution coating or PLA, PBAT, PBS, EVOH, EVA, HMF film, or a mixture of these films paper PVA film lamination or PVA solution coating
(Omitted when coating both sides with PVA solution in ⓐ) ⓓ You can do without a layer, and laminate one or more of PLA, PBAT, PBS, EVOH, EVA PVA, HMF, PA films or a film made by mixing them. When EVA, PA, or HMF is applied to a film, adhesive, or ⓓ layer that is heat-bonded with the container, the ⓔ layer may be omitted. - <B> ⓐ Lamination of one or more of PVA solution coating or PLA, PBAT, PBS, EVOH, EVA, HMF film, or a mixture of these films paper Lamination of one or more of PVA solution coating or PLA, PBAT, PBS, EVOH, EVA, HMF film, or a mixture of these films Lamination of one or more of PLA, PBAT, PBS, EVOH, EVA, PVA, PA, HMF films or a mixture of these films If the container is PP, PP (OPP film or CPP film) film,
PE film if the container is PE Lamination of one or more of PA, HMF, EVA films, or adhesive coating ⓑ - - - - If the container is PP, PP film (OPP film or CPP film) film
PE film if the container is PE Lamination of one or more of PA, HMF, EVA films, or adhesive coating <C> film for label - print layer Coating with a solution containing at least one of PVA or AAE. or PVA film lamination Laminating at least one of EVA, PA, HMF film, or adhesive coating - ⓒ floor and ⓓ floor can be changed ※<Glossary>
PVA: Poly vinyl alcohol, PLA: Poly Lactic Acid, PBAT: Polybutylene adipate-co-terephthalate, PBS: polybutylene succinate, EVOH: Ethylene vinyl Alcohol, EVA: Ethylene Vinyl Acetate, HMF: Hot melt film, PA: Poly amide, PP : Polypropylene, PE: Polyethylene, OPP: Oriented polypropylene, CPP: Casting polypropylene, AAE; Acrylic acid emulsion

<A> of Table 1, as shown in FIG. 1, the ⓐ layer is a single or both-side coating of PVA solution on paper (ⓑ layer), or PLA, PBAT, PBS, EVOH, EVA, HMF film, or a film made by mixing them at least one of them is laminated. The ⓒ layer is made by laminating a PVA film or coating a PVA solution (omitted when coating both sides of the PVA solution in ⓐ), and for the ⓓ layer, PLA, PBAT, PBS, EVOH, EVA PVA, HMF, PA film or a mixture thereof. One or more of the films are laminated. Depending on the required characteristics, the ⓓ layer may be omitted in some cases. The ⓔ layer can be formed by laminating a film that can be bonded to the container by pressing and heating, or by coating an adhesive that bonds to the container. In this case, when one or more of EVA, PA, and HMF is applied in the ⓓ layer, the ⓔ layer may be omitted.

In the case of <A> in Table 1, as a packaging material to which paper is applied, it is possible to improve the inconvenience of using paper products caused by the disadvantages of being vulnerable to moisture and water and weak in strength, and to be sealed by pressing and heating. Thus, it not only eliminates the hassle of applying a separate adhesive and sealing in the sealing process, but also enables printing on paper in advance, so that there are no restrictions on printing whether it is water-based or oil-based printing. ease of use is increased. In addition, by increasing the moisture or gas (oxygen) permeation barrier properties, the contents can be stored for a long period of time so that they do not deteriorate for a long time. By using only environmentally friendly materials that are completely harmless to the environment, environmental pollution is not caused at all during the manufacturing process.

<B>-ⓐ in Table 1 is ⓐ, ⓒ layer is the same as layer ⓐ in <A> in Table 1, and layer ⓓ is PLA, PBAT, PBS, EVOH, EVA, PVA, PA, HMF film, or a mixture of these Lamination of one or more of the films made by make it For the ⓕ layer, one or more of PA, HMF, and EVA films should be laminated or coated with an adhesive that adheres to the container.

<B>-ⓑ in Table 1 should be the same as in ⓐ to ⓔ and ⓕ in <B> in Table 1.

In the case of ⓐ in <B> of Table 1, it is a packaging material designed by essentially grafting a film and paper of the same material as a container. did it When the packaging material is applied to the cup container lid as shown in FIG. 2, when the ⓐ part (the paper part part) of the lid packaging material attached to the container is removed during use, the space between ⓓ and ⓔ is easily separated, and the hole in which the straw can be inserted This came out so that a straw could be inserted to drink the drink. The removed ⓐ part is made of only eco-friendly materials to prevent environmental pollution, and the ⓑ part attached to the container is made of almost the same material as the container. Because of this, it can be recycled as it is, just like a container.

If you are reluctant to use a straw or if it is not a drink (manufactured without a hole), as described above, remove the ⓐ part and then remove the ⓑ part leaving only a part of the ⓑ part. Since the part is made of almost the same material as the container, it can be recycled as it is.

In the case of ⓑ of <B> of Table 1, without paper application, the film of the same material as the container in ⓐ of <B> of Table 1 is sealed by compression heating with the container, that is, part ⓐ in FIG. 2 It is removed and only the ⓑ part without a hole is sealed in the container. did it

<C> of Table 1 is printed on a film (ⓐ layer) for a label (ⓒ layer), and a solution containing at least one of PVA or AAE solution is coated thereon. Laminate the PVA film (ⓓ layer). Then, one or more of EVA, PA, and HMF film may be laminated thereon, or an adhesive that adheres to the container may be coated.

In the case of <C> of Table 1, it is generally related to the label, and the printing layer is printed on the film of the same material as the container (ⓒ layer), and then the adhesive coating (ⓔ layer) protects the printing layer ( When coating the adhesive, the printed layer is often erased due to the adhesive solvent) and coating or lamination (ⓓ layer) to increase the moisture or gas (oxygen) permeation barrier properties is intended to minimize the deterioration of the contents. This is also a film made of the same material as the container so that it can be recycled like the container after use. In this case, the ⓒ layer and the ⓓ layer may be changed depending on the type of printing ink and the adhesive component of the ⓔ layer.

A more preferred embodiment of the eco-friendly packaging material according to the present invention will be described in detail in Table 2.

division ⓐ ⓑ ⓒ ⓓ ⓔ ⓕ <A> ⓐ Lamination of one or more of PLA, PBAT, PBS, EVOH, EVA, HMF film or a film made by mixing them paper PVA film lamination or PVA solution coating Lamination of one or more of PLA, PBAT, PBS, EVOH film or a film made by mixing them Laminating one or more of EVA, HMF, PA films, or films made by mixing them, or adhesive coating - ⓑ Lamination of one or more of PLA, PBAT, PBS, EVOH, EVA, HMF film or a film made by mixing them paper PVA film lamination or PVA solution coating - Laminating one or more of EVA, HMF, PA films, or films made by mixing them, or adhesive coating - <B> ⓐ Lamination of one or more of PLA, PBAT, PBS, EVOH, EVA, HMF film or a film made by mixing them paper Lamination of one or more of PVA solution coating or PLA, PBAT, PBS, PVA, EVOH films or a mixture of these films Lamination of at least one of EVA, PA, HMF film or a film made by mixing them If the container is PP, PP (OPP film or CPP film) film,
PE film if the container is PE, PET film if the container is PET Lamination of one or more of PA, HMF, EVA films, or adhesive coating ⓑ - - - - If the container is PP, PP film (OPP film or CPP film) film
PE film if the container is PE Lamination of one or more of PA, HMF, EVA films, or adhesive coating <C> ⓐ film for label - Print (advertisement description, etc.) layer Coating with a solution containing at least one of PVA or AAE. or PVA film lamination Laminating at least one of EVA, PA, HMF film, or adhesive coating - ⓑ film for label - Coating with a solution containing at least one of PVA or AAE. or PVA film lamination Print (advertisement description, etc.) layer Laminating at least one of EVA, PA, HMF film, or adhesive coating - ※<Glossary>
PVA: Poly vinyl alcohol, PLA: Poly Lactic Acid, PBAT: Polybutylene adipate-co-terephthalate, PBS: polybutylene succinate, EVOH: Ethylene vinyl Alcohol, EVA: Ethylene Vinyl Acetate, HMF: Hot melt film, PA: Poly amide, PP : Polypropylene, PE: Polyethylene, OPP: Oriented polypropylene, CPP: Casting polypropylene, AAE; Acrylic acid emulsion

To explain <A>-ⓐ in Table 2,

(i) paper; and (ii) the (i) PLA (Poly Lactic Acid), PBAT (Polybutylene Adipate-co-Terephthalate), PBS (Polybutylene Succinate), EVOH (Ethylene Vinyl Alcohol), EVA (Ethylene Vinyl Acetate) and At least one film layer selected from the group consisting of HMF (Hot Melt Film); and (iii) the (i) PVA film layer or PVA solution coating layer formed on the lower surface of the paper; And (iv) at least one film layer selected from the group consisting of PLA, PBAT, PBS, EVOH formed on the lower surface of the (iii) layer; and (v) at least one film layer or adhesive layer selected from the group consisting of PA, EVA, and HMF formed on the lower surface of the layer (iv).

To explain <A>-ⓑ in Table 2,

(i) paper; and (ii) at least one film layer selected from the group consisting of (i) PLA, PBAT, PBS, EVOH, EVA and HMF formed on the upper surface of the paper; and (iii) the (i) PVA film layer or PVA solution coating layer formed on the lower surface of the paper; and (iv) at least one film layer or adhesive layer selected from the group consisting of PA, EVA, and HMF formed on the lower surface of the layer (iii).

To explain <B>-ⓐ in Table 2,

In addition, in the present invention, (i) paper; and (ii) at least one film layer selected from the group consisting of (i) PLA, PBAT, PBS, EVOH, EVA and HMF formed on the upper surface of the paper; and (iii) at least one film layer selected from the group consisting of (i) a PVA solution coating layer formed on the lower surface of the paper or PLA, PBAT, PBS, PVA, EVOH; and (iv) at least one film layer selected from the group consisting of EVA, PA, and HMF formed on the lower surface of the (iii) layer; and (v) a film layer of the same material as the container formed on the lower surface of the layer (iv) [when the container is PP, a PP film (OPP film or CPP film), when the container is PE, a PE film, and when the container is PET PET film]; and (vi) at least one film layer or adhesive layer selected from the group consisting of PA, HMF, and EVA formed on the lower surface of the (v) layer.

To explain <B>-ⓑ in Table 2,

(i) Film [PP film (OPP film or CPP film) when the container is PP, PE film when the container is PE, PET film when the container is PET]; and (ii) at least one film layer or adhesive layer selected from the group consisting of PA, HMF, and EVA formed on the lower surface of the film of (i).

To explain <C>-ⓐ in Table 2,

(i) Film for label [PP film (OPP film or CPP film) if the container is PP, PE film if the container is PE, PET film if the container is PET]; and (ii) a printed layer formed on the lower surface of the label film of (i) for advertisement explanation, etc.; and (iii) a coating layer or a PVA film layer coated with a solution comprising at least one of a PVA solution or an AAE solution formed on the lower surface of the (ii) layer; and (iv) one or more film layers or adhesive layers selected from the group consisting of EVA, PA, and HMF formed on the lower surface of the layer (iii).

To explain <C>-ⓑ in Table 2,

(i) Film for label [PP film (OPP film or CPP film) if the container is PP, PE film if the container is PE, PET film if the container is PET]; and (ii) a coating layer or PVA film layer coated with a solution containing at least one of a PVA solution or an AAE solution formed on the lower surface of the label film of (i); and (iii) a printed layer formed on the lower surface of the (ii) layer for advertisement explanation and the like; and (iv) one or more film layers or adhesive layers selected from the group consisting of EVA, PA, and HMF formed on the lower surface of the layer (iii).

<A>, <B>-ⓐ, <B>-ⓑ, <C> of Table 1 and <A>-ⓐ, <A>-ⓑ, <B>-ⓐ, <B>-ⓑ, <C>-ⓐ and <C>-ⓑ can be coated and laminated as described above. The PVA solution used herein may be an aqueous solution containing 1 to 10% of PVA, preferably an aqueous solution containing 6%. The AAE solution may be an aqueous solution containing 55 to 90% of acrylic acid emulsion, preferably an aqueous solution containing 60 to 85% of acrylic acid emulsion.

For solution coating, as shown in FIG. 3 , the paper or film wound on a roll is coated by passing it through a roller dipped in the solution, and then dried and coated. As shown in 4, a pair of heated (200° C. or less) rollers are interlocked and the paper-film or film-film to be laminated is put between the rotating rollers, and lamination is performed by pressing rolling heating method to match. After coating, the drying temperature (Drying chamber temperature in Fig. 3) is an aqueous solution, so the coating solution used may be appropriately determined within the range that does not damage the product.

In the solution coating in the above, the coating method is a painting method, that is, a paper or film wound on a roll is passed through a roller dipped in a solution and dried, and lamination is performed by compression rolling and heating (200 ° C.) The following) method may be used for lamination.

In the above, the PVA solution may be an aqueous solution containing 1 to 10% of PVA, and the AAE solution may be an aqueous solution containing 55 to 90% of acrylic acid emulsion.

When the coating solution is first coated on paper, the paper may cry depending on the type of paper, and after drying, as shown in FIG. It is good to increase the flatness.

Since the lamination temperature and the drying temperature of the remaining coatings except for the initial solution coating on the paper are significantly different depending on the type, thickness, and production speed of the paper and film, it should be appropriately determined within the range where the product is not damaged.

The thickness of the paper or film used should just be 5-200 micrometers, Preferably it is about 10-70 micrometers.

Hereinafter, preferred examples are presented to help the understanding of the present invention, but the following examples are merely illustrative of the present invention, and it will be apparent to those skilled in the art that various changes and modifications are possible within the scope and spirit of the present invention, It goes without saying that such variations and modifications fall within the scope of the appended claims.

[Example]

Example 1

<A> of Table 1 is a PBAT 20㎛ film is first laminated cross-section on paper as shown in Figure 4 at 130 ~ 150 ℃ [layer ⓐ in Figure 1] and paper [layer ⓑ in Figure 1] on the opposite side of the method of Figure 4 A PVA film with a thickness of 40 μm was laminated at 160-200° C. [layer ⓒ in FIG. 1]. And on this, the PBAT film is laminated like the previous layer ⓐ by the method of FIG. 4 at 130 to 150 ° C [ⓓ layer in FIG. 1], and an EVA film with a thickness of 40 μm is applied thereon at 60 to 80 ° C. by the method of FIG. It was laminated [layer ⓔ in Fig. 1].

On the other hand, a PLA film with a thickness of 20㎛ is laminated on paper by the method of Fig. 4 at 130~150℃, and 60g of PVA is dissolved in 1ℓ (liter) of water on the opposite side of the paper [layer ⓑ in Fig. 1] The made PVA solution was coated in the same manner as in FIG. 3 [layer ⓒ in FIG. 1] and a 50 μm HMF film was laminated thereon at 60-80° C. by the method of FIG. 4 [layer ⓓ in FIG. 1].

The paper used in the examples was prepared by using a paper pre-printed on kraft paper (30 gsm) [gsm; g / m (gram per square meter)] before solution coating and film lamination to confirm the ease of printing. As a result of applying one packaging material to the lid packaging material of a PP container by pressing and heating it at 120~150℃, the adhesion to the container is perfect, the heat compression adhesion is good, and the gas (oxygen) barrier property is also 0.2cc/(pkg-day) of oxygen. It was confirmed that it can block well, and when the lid packaging material was opened, it was confirmed that there was no residue left on the rim surface of the adhesive side of the container and it fell cleanly and neatly.

In <B> of Table 1, ⓐ, ⓐ, and ⓒ are laminated with a PBAT 20㎛ film as in <A> of Table 1 above, and the ⓓ layer is an EVA 40㎛ film 60 ~ 80℃ as in the method of FIG. was laminated in The ⓔ layer is a film of the same material as the test container, that is, a PP (OPP film) film (thickness 50㎛) is laminated at 60~80℃ as shown in FIG. 4, and the ⓕ layer is a 40㎛ EVA film with a thickness of 60~80℃ Lamination was carried out as in the method of FIG.

As a result of applying the packaging material prepared in this way by pressing and heating at 120~150℃ with the lid packaging material of the PP container, it was confirmed that the adhesion to the container was perfect, and the separation between ⓓ and ⓔ was well separated. As it came out, it was confirmed that the straw can be easily inserted, and it was confirmed that the OPP film part was well attached to the container even when ⓓ was removed, so that it can be recycled like the container.

ⓑ of <B> of Table 1 was the same as the ⓔ and ⓕ layers in ⓐ of <B> of Table 1, and it was also confirmed that the OPP film part was well attached to the container, so that it could be recycled like the container.

<C> of Table 1 is printed on PP film (ⓐ layer) for label [ⓒ layer], and AAE solution is coated thereon in the same way as in FIG. 3 [ⓓ layer] and adhered to the container on this The resulting sealant adhesive was coated in the same manner as in FIG. 3 .

The label prepared in this way was attached to the surface of the PP container by pressing and heating it between 100 and 200°C. If the compression heating time is lengthened within the temperature range of 100 to 200°C, the temperature may be lower than within this temperature range, and if the time is short, it may be performed at a higher temperature. The compression heating time was within a few seconds. After putting the container to which the label was attached as described above in water for 48 hours, it was confirmed that the label did not come off at all.

Table 3 shows the results of applying the four types of eco-friendly packaging materials.

division printability Compression Heat Adhesion Block gas (oxygen) permeation Is there any residue left on the rim of the container when the lid is opened? <A> in Table 1 ease well done 0.2cc/(pkg-day) neat and clean ⓐ of <B> in Table 1 ease well done 0.3cc/(pkg-day) neat and clean ⓑ of <B> in Table 1 Same as before well done 0.3cc/(pkg-day) neat and clean <C> in Table 1 Protects the printed layer when coating with adhesive well done 0.4cc/(pkg-day) -

As described above, the present invention aims to replace various environmentally harmful packaging materials used in the past with eco-friendly packaging materials that are harmless to the human body. It is easy to print, does not tear the packaging material, does not get wet, etc.) and required characteristics (strong bonding strength, sealability, oxygen permeability barrier, etc.) to the maximum, and to facilitate recycling after use.

In the case of <A> of Table 1, as a packaging material to which paper is applied, it has the effect of improving the inconvenience of using paper products, which is caused by the disadvantages of being vulnerable to moisture and water, and weak strength, and is a compression heating method It has the effect of eliminating the hassle of applying a separate adhesive and sealing in the sealing process, and it enables pre-printing on paper so that there are no restrictions on water-based printing or oil-based printing, so printing is easy It has the effect of increasing the moisture or gas (oxygen) permeation barrier, so that the contents can be stored for a long time without being deteriorated for a long period of time for a desired period. In addition, after use, the removed packaging material can be recycled as the film and paper are separated by putting it in water, and even if it is just thrown away, it is decomposed within a few months, which has the effect of not causing any environmental pollution.

Case ⓐ in <B> of Table 1 is a packaging material designed by grafting film and paper of the same material as the container, and not only has the same effects as in the case of <A> in Table 1, but also contains paper parts and film parts. By making it separable, paper parts made of only eco-friendly materials are removed when in use, and the film attached to the container is made of almost the same material as the container, so it has the effect of allowing recycling as it is.

In addition, if the paper part is separated when in use, it has the effect of facilitating drink intake by releasing a hole for using a straw. It has the effect of making it easy to use without causing environmental pollution by allowing the contents to be ingested.

In the case of ⓑ in <B> of Table 1, without paper application, the film of the same material as the container is sealed with the container, leaving only a part of the film, and then the contents are ingested. After use, the film attached to the container It has the effect of allowing it to be recycled as it is with the container, and has the effect of enabling packaging at a low price and facilitating recycling.

In the case of <C> of Table 1, printing is performed on a film of the same material as a container, and coating a solution containing at least one of PVA or AAE on it, or laminating a PVA film, It has the effect of protecting the product (the printing layer is often erased during coating due to the adhesive solvent), and has the effect of minimizing the deterioration of the contents by increasing the moisture or gas (oxygen) permeation barrier property, In addition, it has the effect of enabling recycling like a container after use by applying a film of the same material as the container.

Claims (15)

Eco-friendly packaging including:
(i) paper;
(ii) at least one film layer selected from the group consisting of PLA, PBAT, PBS, EVOH, EVA, PVA, HMF and PA formed on the upper surface of the (i) paper;
(iii) a PVA film layer formed on the upper surface of the film layer of (ii); and
(iv) at least one film layer or adhesive layer selected from the group consisting of EVA, PA and HMF formed on the lower surface of the (ii) film layer. Eco-friendly packaging including:
(i) paper;
(ii) at least one film layer selected from the group consisting of PLA, PBAT, PBS, EVOH, EVA and HMF formed on the top surface of the (i) paper;
(iii) the (i) PVA film layer formed on the lower surface of the paper ;
(iv') at least one film layer selected from the group consisting of PLA, PBAT, PBS, EVOH, EVA, HMF and PA formed on the lower surface of the (iii) film layer; and
(iv') at least one film layer or adhesive layer selected from the group consisting of EVA, PA and HMF formed on the lower surface of the film layer. delete Eco-friendly packaging including:
(i) paper;
(ii) at least one film layer selected from the group consisting of PLA, PBAT, PBS, EVOH, EVA and HMF formed on the top surface of the (i) paper;
(iii) the (i) PVA film layer formed on the lower surface of the paper;
(iv') at least one film layer selected from the group consisting of PLA, PBAT, PBS, EVOH, EVA, HMF and PA formed on the lower surface of the (iii) film layer;
(v'') at least one film layer selected from the group consisting of OPP, CPP and PE on the lower surface of the (iv') film layer; and
At least one film layer or adhesive layer selected from the group consisting of PA, HMF and EVA on the lower surface of the (v'') film layer. delete delete delete delete delete delete A method of manufacturing an eco-friendly packaging material of claim 1, comprising the following steps:
(a) coating a PVA solution on the upper surface of the paper to form a PVA film layer;
(b) forming a film layer by laminating one or more films selected from the group consisting of PLA, PBAT, PBS, EVOH, EVA, PVA, HMF and PA on the lower surface of the PVA film layer; and
(c) laminating at least one film selected from the group consisting of EVA, PA and HMF, which is heat-bonded by compression with a container, on the lower surface of the film layer of (b), or coating a sealant adhesive that adheres to the container. A method of manufacturing an eco-friendly packaging material of claim 2 comprising the following steps:
(a) forming a film layer by laminating one or more films selected from the group consisting of PLA, PBAT, PBS, EVOH, EVA and HMF on the upper surface of the paper;
(b) laminating a PVA film on the lower surface of the paper or coating a PVA solution to form a PVA film layer;
(c) forming a film layer by laminating one or more films selected from the group consisting of PLA, PBAT, PBS, EVOH, EVA and HMF on the lower surface of the PVA film layer; and
(d) laminating at least one film selected from the group consisting of EVA, PA, and HMF, which is heat-bonded by compression with a container, on the lower surface of the film layer of (c), or coating a sealant adhesive that adheres to the container. A method for manufacturing an eco-friendly packaging material of claim 4 comprising the following steps:
(a) forming a film layer by laminating one or more films selected from the group consisting of PLA, PBAT, PBS, EVOH, EVA and HMF on the upper surface of the paper;
(b) laminating a PVA film on the lower surface of the paper or coating a PVA solution to form a PVA film layer;
(c) forming a film layer by laminating one or more films selected from the group consisting of PLA, PBAT, PBS, EVOH, EVA and HMF on the lower surface of the PVA film layer;
(d) forming a film layer by laminating at least one film selected from the group consisting of OPP, CPP and PE on the lower surface of the film layer of (c); and
(e) laminating at least one film selected from the group consisting of PA, HMF and EVA, which is heat-bonded by compression with a container, on the lower surface of the film layer of (d), or coating a sealant adhesive that adheres to the container. delete delete

Images