KR102300506B1 - Oxo-biodegradable cap type pouch - Google Patents

Abstract

Oxidative biodegradable cap-type pouch according to the present invention, the cap end (110); Discharge pipe 120 screwed to the cap end (110); a pouch coupling part 130 integrally coupled with the discharge pipe 120 and connecting the discharge pipe 120 and the pouch 200; and an oxidative biodegradable pouch 200 in which the contents are stored;
The oxidation biodegradable pouch 200 may include: performing gravure printing on a paper-based barrier material; and a printed paper-based barrier material; and a plastic substrate containing 0.5 to 1.5 wt% of an oxidative biodegradable polymer and comprising at least one of LLDPE, LDPE, PP, HDPE and CPP; , characterized in that the paper-based barrier material and the plastic substrate are laminated to each other.

Description

Oxo-biodegradable cap type pouch

The present invention relates to an oxidative biodegradable cap-type pouch comprising a paper-based plastic packaging material to which an oxidative biodegradable plastic additive is added.

In general, in order to package seeds, fruits, cosmetic solutions, mask packs, etc., several packaging materials with characteristics are compounded to compensate for the defects of each material, and aluminum is placed on one side of a transparent plastic film made of a material with new packaging performance. A film including a thin film is widely used as a wrapping paper.

This aluminum wrapping paper provides a luxurious and neat effect because the product inside the wrapping paper is not exposed to the outside and blocks moisture and exhibits the unique color and texture of metal.

However, in the case of the wrapping paper as described above, since it contains a plastic material, it is the main culprit of environmental pollution. For example, in an article published on the Internet site "https://www.yna.co.kr/view/PYH20190417182500340?input=1196m", in Guanabara Bay, Rio de Janeiro, Brazil, a sea turtle is surrounded by garbage floating in the sea. can be seen swimming.

Plastic waste is polluting the existing marine ecosystem, and it is predicted that within a few years there will be as much plastic as the proportion of fish in the ocean. In addition, the plastic waste that flows into the sea is broken down into microplastics, which are said to move into the atmosphere and reach uncontaminated remote areas.

To solve these problems, technologies such as separate collection, recycling, and reuse have been proposed, but it seems that the fundamental problem cannot be solved without limiting the use of plastics.

Accordingly, paper coated with a polymer such as polyethylene (PE) on paper is used in a wide range of disposable containers. In general, polyethylene-coated paper is manufactured by extrusion coating polyethylene on one or both sides of paper, and thus refers to paper that serves to prevent leakage of contents and absorption of moisture.

However, polyethylene-coated paper has excellent moisture barrier properties and blocks moisture, but has low barrier properties against oxygen, so that when a container is manufactured, the contents are oxidized and decayed. Therefore, in order to prevent oxidation and spoilage of food due to contact with oxygen and to enable long-term storage, an aluminum coating layer such as Tetra Pak is introduced to provide oxygen barrier properties, or Nylon, EVOH, etc. are coated. . However, for the introduction of the aluminum coating layer, aluminum is not only an expensive material but also requires an expensive process, and Nylon and EVOH are not only expensive but also require an additional bonding layer.

Korea Patent No. 10-1965960 "Reusable cap-type pouch"

The present invention has been devised to solve the above problems, and provides a biodegradable cap-type pouch with significantly improved oxidative biodegradability by forming a plastic substrate on a paper-based barrier material through a process of mutual lamination.

The purpose of the embodiments of the present invention is not limited to the above-mentioned purpose, and other objects not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. .

In order to achieve this object, an oxidative biodegradable cap-type pouch according to an embodiment of the present invention includes a cap end 110; Discharge pipe 120 screwed to the cap end (110); a pouch coupling part 130 integrally coupled to the discharge pipe 120 and connecting the discharge pipe 120 and the pouch 200; and an oxidative biodegradable pouch 200 in which the contents are stored, the oxidative biodegradable pouch 200 comprising: performing gravure printing on a paper-based barrier material; and a printed paper-based barrier material; and a plastic substrate containing 0.5 to 1.5 wt% of an oxidative biodegradable polymer and comprising at least one of LLDPE, LDPE, PP, HDPE and CPP; , characterized in that the paper-based barrier material and the plastic substrate are laminated to each other.

In the oxidative biodegradable cap-type pouch according to an embodiment of the present invention, the paper-based barrier material is characterized in that it satisfies the following Relations 1 and 2:

[Relational Expression 1]

1.2 ≤ A ≤ 2.9

[Relational Expression 2]

0.3 ≤ B ≤ 1.1

^{(In Relation 1, A is the moisture permeability (g/m 2} ) of the paper-based barrier material measured at 38 ± 2 ° C. and 100% relative humidity, and in Relation 2, B is 23 ± 2 ° C. One is the oxygen permeability (cm ³ /m ² ) of the paper-based barrier material.)

In the oxidative biodegradable cap-type pouch according to an embodiment of the present invention, the oxidative biodegradable polymer comprises fatty acids extracted from palm oil.

As described above, since the oxidative biodegradable cap-type pouch according to the present invention is formed by laminating a paper-based barrier material and the plastic substrate with each other, oxidative biodegradability is remarkably improved.

In addition, the present invention suppresses spoilage and rancidity of the contents inside the oxidative biodegradable pouch 200, and maintains the function and appearance of food for a long time.

In addition, the present invention can have the effect of natural decomposition of almost 100% when buried in soil or the like by including the plastic substrate to which the oxidized biodegradable polymer is added.

In addition, the present invention can reduce the interfacial bonding force between the biodegradable polymer and at least one base material selected from LLDPE, LDPE, PP, HDPE and CPP to prevent deterioration of mechanical properties.

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. .

1 is a real photograph of an oxidative biodegradable cap-type pouch according to an embodiment of the present invention.
2 is a real photograph showing the cap end 110, the discharge pipe 120, and the pouch coupling part 130 in the oxidative biodegradable cap-type pouch according to an embodiment of the present invention.
3 is a graph showing the moisture permeability of the paper-based barrier material used in the oxidative biodegradable pouch 200 in the oxidative biodegradable cap-type pouch according to an embodiment of the present invention.
4 is a graph showing the oxygen permeability of the paper-based barrier material used in the oxidative biodegradable pouch 200 in the oxidative biodegradable cap-type pouch according to an embodiment of the present invention.
5 is an exemplary view illustrating an oxidative biodegradation process of a plastic substrate including the oxidative biodegradable polymer and PP.
6 is an oxidative biodegradable cap-type pouch according to an embodiment of the present invention, showing the aging test results for a plastic substrate made of LLDPE to which 1% of the oxidative biodegradable polymer is added and a plastic substrate made of only LLDPE. It is a graph.

Hereinafter, the present invention will be described in detail. The embodiments and drawings introduced below are provided as examples in order to sufficiently convey the spirit of the present invention to those skilled in the art. In addition, unless there is another definition in the technical and scientific terms used in the present invention, it has the meaning commonly understood by those of ordinary skill in the art to which this invention belongs, and in the following description and accompanying drawings, the present invention Description of known functions and configurations that may unnecessarily obscure the gist of will be omitted.

The present invention was completed after countless trials and errors over a long period of time to solve the environmental pollution problem of the conventional cap-type pouch, comprising: performing gravure printing on a paper-based barrier material in manufacturing an oxidative biodegradable pouch; and a printed paper-based barrier material; and a plastic substrate containing 0.5 to 1.5% by weight of an oxidative biodegradable polymer and comprising at least one of LLDPE, LDPE, PP, HDPE and CPP; The paper-based barrier material and the plastic substrate are laminated to each other to provide a biodegradable cap-type pouch with significantly improved oxidative biodegradability.

Hereinafter, the technical idea of the present invention will be described in more detail with reference to the accompanying drawings.

Since the accompanying drawings are merely examples shown to explain the technical idea of the present invention in more detail, the technical idea of the present invention is not limited to the form of the accompanying drawings.

1 is a real photograph of an oxidative biodegradable cap-type pouch according to an embodiment of the present invention, and FIG. 2 is a cap end 110 and discharge pipe 120 in the oxidative biodegradable cap-type pouch according to an embodiment of the present invention. ) and a real photograph showing the pouch coupling unit 130 .

1 and 2, the oxidative biodegradable cap-type pouch according to the present invention includes a cap end 110; Discharge pipe 120 screwed to the cap end (110); a pouch coupling part 130 integrally coupled to the discharge pipe 120 and connecting the discharge pipe 120 and the pouch 200; and an oxidative biodegradable pouch 200 in which the contents are stored.

In detail, in the oxidative biodegradable cap-type pouch according to an embodiment of the present invention, the oxidative biodegradable pouch 200 includes: performing gravure printing on a paper-based barrier material; and a printed paper-based barrier material; and a plastic substrate containing 0.5 to 1.5 wt% of an oxidative biodegradable polymer and comprising at least one of LLDPE, LDPE, PP, HDPE and CPP; , it is possible to form one side of the oxidative biodegradable pouch 200 through the above steps.

In addition, an adhesive or the like is applied to one edge of the oxidative biodegradable pouch 200 manufactured through the above steps, and the pouch coupling part 130 is interposed at one end of the oxidative biodegradable pouch 200 , and then a pair of By adhering one side of the oxidative biodegradable pouch 200, an oxidative biodegradable cap-type pouch according to the present invention is obtained. In this case, the oxidative biodegradable pouch 200 is characterized in that the paper-based barrier material and the plastic substrate are laminated to each other.

As a practical example, the adhesive is a polyurethane-based adhesive, a two-component polyurethane-based adhesive, a solvent-free polyurethane-based adhesive, a homopolymer, a polyacrylic acid ester-based adhesive, a cyatoacrylate-based adhesive, an ethylene copolymer-based adhesive, a cellulose-based adhesive, One or two selected from the group consisting of polyester-based adhesives, polyamide-based adhesives, amino resin-based adhesives, phenolic resin-based adhesives, epoxy-based adhesives, reactive acrylic adhesives, reactive methacrylic adhesives, rubber-based adhesives, silicone-based adhesives, and inorganic adhesives Including the above adhesive, the laminating step may be performed by dry lamination, wet lamination, extrusion lamination or hot melt lamination method.

1 and 2, in FIG. 1, the cap end 110 is screw-coupled to the discharge pipe 120, and one surface of the oxidative biodegradable pouch 200 is formed in a predetermined pattern or through the gravure printing described above. It can be seen that the design has been formed.

In addition, in FIG. 2 , the cap end 120 is shown in a state not coupled to the discharge pipe 120 , which is a screw thread formed on the outer surface of the discharge pipe 120 . This is to show that the inside is screwed together.

On the other hand, in the oxidative biodegradable cap-type pouch according to an embodiment of the present invention, the paper-based barrier material satisfies the following Relations 1 and 2, thereby causing spoilage and rancidity of the contents inside the oxidative biodegradable pouch 200 suppresses and maintains the function and appearance of food for a long time.

[Relational Expression 1]

1.2 ≤ A ≤ 2.9

[Relational Expression 2]

0.3 ≤ B ≤ 1.1

^{(In Relation 1, A is the moisture permeability (g/m 2} ) of the paper-based barrier material measured at 38 ± 2 ° C. and 100% relative humidity, and in Relation 2, B is 23 ± 2 ° C. One is the oxygen permeability (cm ³ /m ² ) of the paper-based barrier material.)

In detail, the present invention provides at least one of LLDPE, LDPE, PP, HDPE, and CPP because the pouch made of a polymer such as PE (polyethylene) does not easily rot even after several hundred years in completing the oxidative biodegradable cap-type pouch. By adding an oxidative biodegradable polymer to the containing plastic substrate, the product can be induced to decompose in the natural environment. However, in the case of using only a plastic substrate containing an oxidized biodegradable polymer, it is easily decomposed on its own during the distribution or storage process, so corruption and rancidity of the stored contents has emerged as a serious problem. The oxidative biodegradable cap-type pouch according to the present invention includes a paper-based barrier material satisfying the above Relations 1 and 2.

In more detail, the moisture permeation and oxygen permeation effects of the oxidative biodegradable cap-type pouch according to an embodiment of the present invention are as shown in FIGS. 3 and 4 .

3 is a graph showing the moisture permeability of the paper-based barrier material used in the oxidative biodegradable pouch 200 in the oxidative biodegradable cap-type pouch according to an embodiment of the present invention. At this time, the moisture permeability of the paper-based barrier material is a value measured at 38 ± 2 °C and 100% relative humidity through the ASTM F1249-13 test method, and the tester is PERMATRAN-W, Model 3/61, and the test area is 10 cm ² is

As shown in FIG. 3 , the water vapor transmission rate of the paper-based barrier material ^{exhibits a water vapor transmission rate (g/m 2} ) of about 2.85 when initially measured once, and then decreases exponentially from two to ten measurements. It can be seen that the final moisture permeability (g/m ^{2 ·day) of the paper-based barrier material is about 1.2 to 1.3 when measured 10 times.}

4 is a graph showing the oxygen permeability of the paper-based barrier material used in the oxidative biodegradable pouch 200 in the oxidative biodegradable cap-type pouch according to an embodiment of the present invention. At this time, the oxygen permeability of the paper-based barrier material is a value measured at 23 ± 2 °C through the ASTM F1927-14 test method, and the tester is ILLINOIS 8003.

As shown in FIG. 4 , the oxygen permeability of the paper-based barrier material exhibits an oxygen permeability (cm ³ /m ² ) of about 1.1 when initially measured once, and then decreases exponentially from two to five measurements. . It can be seen that the final oxygen permeability (cm ³ /m ^{2 ·day) of the paper-based barrier material is about 0.3 to 0.4 when measured 5 times.}

In addition, in the oxidative biodegradable cap-type pouch according to an embodiment of the present invention, the oxidative biodegradable polymer may include fatty acids extracted from palm oil.

In terms of the manufacturing method, the above-described plastic substrate comprises the steps of blending the oxidative biodegradable polymer with at least one base material from among LLDPE, LDPE, PP, HDPE and CPP; mixing and melting the blended raw materials; solidifying the molten raw material; And extruding the solidified raw material to prepare a plastic substrate in the form of a film; can be prepared through. In this case, the plastic substrate may contain 0.5 to 1.5% by weight of the oxidized biodegradable polymer and include at least one of LLDPE, LDPE, PP, HDPE and CPP.

5 is an exemplary view illustrating an oxidative biodegradation process of a plastic substrate including the oxidative biodegradable polymer and PP. Referring to FIG. 5 , when the plastic substrate is exposed to a natural environment including soil, sunlight, heat, air, etc., Step 1: oxidative decay and Step 2: biodegradation are respectively shown. Here, the 1st step: oxidation decomposition process shows a phenomenon of low molecular weight, and the low molecular weight process continues for about 6 months. In addition, the second step: biodegradation process shows the decomposition process by microorganisms of the low molecular weight product in the first step. As shown in FIG. 5, when magnified by about 10,000 times with an electron microscope (SEM), micro-organisms are on the surface Formation and traces of biodegradation by these microorganisms can be confirmed.

6 is an oxidative biodegradable cap-type pouch according to an embodiment of the present invention, showing the aging test results for a plastic substrate made of LLDPE to which 1% of the oxidative biodegradable polymer is added and a plastic substrate made of only LLDPE. It is a graph. When measuring the aging test, ASTM D882-10 was applied mutatis mutandis, and the aging test results were expressed in terms of elongation at break (unit %) at 80 ± 1 °C.

Referring to FIG. 6 , the plastic substrate showed a point at which the initial elongation decreased to 50% on about 8 days, but the plastic substrate made of only LLDPE did not show a point where the initial elongation decreased to 50% even in a harsh aging test environment. can be known Accordingly, the present invention can have an effect that almost 100% is naturally decomposed when buried in soil or the like by including the plastic substrate to which the oxidative biodegradable polymer is added.

In addition, the present invention may further include a reactive compatibilizer during the step of blending the raw materials in the above-described method for manufacturing a plastic substrate. The compatibilizer allows the polymers to be well mixed (blended) through a chemical reaction between the composition polymer and the functional groups introduced into the compatibilizer during melt mixing of the polymers. There are two types of compatibilizers: a non-reactive compatibilizer that uses only physical properties and a reactive compatibilizer that accompanies a reaction during extrusion. The non-reactive compatibilizer is a random copolymer, a graft copolymer, a block copolymer, etc. are most often used, and a reactive group is attached thereto to become a reactive compatibilizer in many cases. The reactive group includes maleic anhydride, epoxy, carbonyl group, and the like, and these reactive groups are attached to the terminal or side surface of the compatibilizer in most cases.

The compatibilizer included in the plastic substrate of the present invention is a reactive compatibilizer, particularly preferably having an epoxy group as a reactive group. There is no limitation as long as it is a compatibilizer having an epoxy group as a reactive group, but in particular, it is preferable to use at least one selected from glycidyl methacrylate or maleic anhydride in consideration of the physical properties of the manufactured plastic substrate.

In this case, the glycidyl methacrylate may have a structure of Formula 1 below, and the maleic anhydride may have a structure of Formula 2 below.

[Formula 1]

[Formula 2]

For example, the compatibilizer used in the present invention is preferably 1 to 20% by weight, more preferably 1 to 7% by weight, based on the total weight of the blended raw materials. When the compatibilizer is used in an amount of less than 1% by weight, the effect of increasing the compatibility is lowered and the mechanical properties of the product are not good. Mechanical properties may decrease by lowering the interfacial bonding force between one or more base materials selected from LLDPE, LDPE, PP, HDPE, and CPP.

In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the specific embodiments described above, and it is common in the technical field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Various modifications are possible by those having the knowledge of, of course, these modifications should not be individually understood from the technical spirit or prospect of the present invention.

110: cap end
120: discharge pipe
130: pouch coupling part
200: oxidation biodegradable pouch

Claims (3)

In the cap-type pouch,
cap end 110;
Discharge pipe 120 screwed to the cap end (110);
A pouch coupling part 130 integrally coupled with the discharge pipe 120 and connecting the discharge pipe 120 and the pouch 200, and
and an oxidative biodegradable pouch 200 in which the contents are stored,
The oxidative biodegradable pouch 200,
performing gravure printing on the paper-based barrier material; and
Printed paper-based barrier material, containing 0.5 to 1.5 wt% of an oxidative biodegradable polymer, Linear Low Density Polyethylene (LLDPE), Low Density Polyethylene (LDPE), polypropylene (Polypropylene, PP) , High-density polyethylene (HDPE) and non-stretched polypropylene (Cast Polypropylene, CPP) comprising the step of laminating the plastic substrate comprising at least one or more,
The paper-based barrier material and the plastic substrate are laminated to each other,
The paper-based barrier material satisfies the following Relations 1 and 2,
[Relational Expression 1] is
1.2 ≤ A ≤ 2.9
[Relational 2] is
0.3 ≤ B ≤ 1.1
^{(In Relation 1, A is the moisture permeability (g/m 2} ) of the paper-based barrier material measured at 38 ± 2 ° C. and 100% relative humidity, and in Relation 2, B is 23 ± 2 ° C. One is the oxygen permeability (cm ³ /m ² ) of the paper-based barrier material.) is,
The plastic substrate is the oxidative biodegradable polymer and linear low-density polyethylene (LLDPE), low-density polyethylene (LDPE), polypropylene (Polypropylene, PP), high-density polyethylene (HDPE) and Blending at least one base material in non-drawn polypropylene (Cast Polypropylene, CPP); mixing and melting the blended raw materials; solidifying the molten raw material; and extruding the solidified raw material to produce a plastic substrate in the form of a film,
The oxidized biodegradable polymer includes fatty acids extracted from palm oil,
The oxidation biodegradable polymer and linear low density polyethylene (LLDPE), low density polyethylene (LDPE), polypropylene (Polypropylene, PP), high density polyethylene (High Density Polyethylene, HDPE) and unstretched polypropylene (Cast Polypropylene, CPP) may further include a reactive compatibilizer in the step of mixing at least one or more of the base materials, and as the reactive compatibilizer, at least one selected from glycidyl methacrylate or maleic anhydride having an epoxy group use ,
The oxidative biodegradable cap-type pouch, characterized in that the reactive compatibilizer is 1 to 20% by weight of the total weight of the blended raw material.
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