KR20230031727A - Eco-friendly Coating Composition for keeping Warm or Cold insulation of Package Paper - Google Patents

Abstract

The present invention relates to a coating composition for an eco-friendly cold-insulating packaging material and a manufacturing method thereof, and more specifically, to an eco-friendly coating composition and a manufacturing method thereof, wherein the coating composition is applied to a paper-based packaging material to provide insulation, water resistance, and oil resistance to the packaging material, and does not emit harmful substances such as environmental hormones when the packaging material is incinerated. According to the present invention, provided is the coating composition for an eco-friendly cold-insulating packaging material, containing: 30 to 60 parts by weight of an acrylic resin consisting of butyl acrylate, styrene, and acrylamide; 1 to 5 parts by weight of a viscosity agent composed of an acrylic copolymer; 10 to 40 parts by weight of filler; and 20 to 30 parts by weight of solvent. Provided is a manufacturing method of the coating composition for an eco-friendly cold-insulating packaging material, comprising: a resin mixture solution preparation step of preparing a resin mixture solution by dissolving an acrylic resin composed of butyl acrylate, styrene, and acrylamide in a solvent at room temperature; a filler addition step of adding a filler to the resin mixture solution and mixing the same; and a viscosity control step of adding a viscosity agent to the resin mixture solution to which the filler is added to obtain the coating composition having a predetermined viscosity.

Description

Coating composition for eco-friendly cold packaging and its manufacturing method {Eco-friendly Coating Composition for keeping Warm or Cold insulation of Package Paper}

The present invention relates to a coating composition for an eco-friendly cold packaging material and a method for manufacturing the same, and more particularly, to a paper-based packaging material to impart insulation, water resistance and oil resistance to the packaging material, and to discharge harmful substances such as environmental hormones when the packaging material is incinerated. It relates to an eco-friendly coating composition solution without this and a method for manufacturing the same.

In general, as logistics develops, various goods are actively transported, and packaging technology suitable for the characteristics of the goods to be transported is also being developed to preserve the properties so that the goods are not damaged or deteriorated during transportation.

If the goods to be transported are items that may deteriorate due to changes in the temperature of the contents, such as fresh food such as meat, fish, shellfish, vegetables, fruits, cooked food, frozen desserts, and medicines such as antibiotics, In order to prevent this, a packaging material with a cold (or warm) function is required.

In this way, in order to impart a cooling function to the packaging, box-type packaging materials made of expanded styrene resin (EPS) are still widely used, but the expanded styrene resin is highly likely to be damaged by impact applied during transportation, and in order to prevent this When the wall of the packaging is manufactured to be thick, the volume of the packaging box increases, resulting in increased logistics costs or inconvenience in handling.

In addition, expanded styrene resin is difficult to recycle, and when disposed of by landfill or the like, it takes a long time to decompose, thereby adversely affecting the environment.

In order to solve these disadvantages, a cold-insulating packaging material made of paper is manufactured and used. Conventionally, in order to block heat loss, an aluminum laminate film with good insulation or a plastic film laminated by melting and scattering inorganic materials is attached to the base paper to form a barrier film. However, after opening the paper packaging box and using the contents, the plastic film must be removed and separated and discharged, which is inconvenient when discharging.

As a way to avoid separate discharge of the film, a method of coating with polyethylene coating or paraffin-based coating wax has been developed, but in this case, the thermal insulation effect is significantly lowered, it is difficult to print on the coating film, and adhesion There is a problem that doesn't go well.

In addition, in the case of a coating agent composed of polyethylene resin, there is a problem that it does not decompose naturally, so it requires a lot of cost in processing and causes problems of environmental pollution.

Republic of Korea Patent Registration No. 10-1519521 (2015.05.16.) Republic of Korea Patent Registration No. 10-2206056 (2021.01.15.)

The present invention has been made to solve the above problems, and an object of the present invention is to apply to a packaging material made of inexpensive paper material to impart thermal insulation, water resistance and oil resistance, thereby using a packaging material that may deteriorate due to temperature change. It is to provide a coating composition for an eco-friendly cold packaging material and a method for manufacturing the same, which can provide the best freshness by maximizing the cold storage state during transportation and storage of goods.

Another object of the present invention is to provide a coating composition for an eco-friendly cold-insulated packaging material and a method for manufacturing the same, which is applied to a packaging material made of paper and is environmentally friendly because there is no emission of harmful substances such as environmental hormones during incineration of the packaging material.

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

In order to achieve the above object, the present invention, according to an embodiment of the present invention, 30 to 60 parts by weight of an acrylic resin composed of butyl acrylate, styrene and acrylamide; 1 to 5 parts by weight of a viscosity agent composed of an acrylic copolymer; 10 to 40 parts by weight of filler; And 20 to 30 parts by weight of the solvent; it is possible to provide a coating composition for an eco-friendly cold packaging material containing.

At this time, the acrylic resin is characterized in that it is a mixed resin formed by mixing 50 to 60 parts by weight of the butyl acrylate, 25 to 35 parts by weight of the styrene, and 10 to 15 parts by weight of the acrylamide.

In addition, the filler is characterized in that the porous ceramic powder containing aluminum silicate (Aluminum silicate) as a main component.

In addition, the coating composition solution is characterized in that it further comprises; 0.01 to 3 parts by weight of a pH adjusting agent consisting of 2-amino-2-methyl-1-propanol.

In addition, the solvent is characterized in that it is formed by adding and mixing one or more additives selected from a viscosity agent, an antifoaming agent, a dispersing agent, an antifreezing agent, an antibacterial agent, and a TG regulator in an inorganic solvent.

Here, the antimicrobial agent is characterized in that consisting of methylisothiazolinone (Methylisothiazolinone).

Meanwhile, according to an embodiment of the present invention, a resin mixture solution is prepared by dissolving an acrylic resin composed of butyl acrylate, styrene and acrylamide in a solvent at room temperature to prepare a resin mixture solution step; A filler addition step of adding and mixing a filler into the resin mixture solution; and a viscosity control step of obtaining a coating composition having a predetermined viscosity by adding a viscosity agent to the resin mixture solution to which the filler is added.

Here, the coating composition is characterized by consisting of 30 to 60 parts by weight of the acrylic resin, 1 to 5 parts by weight of the viscosity agent, 10 to 40 parts by weight of the filler, and 20 to 30 parts by weight of the solvent.

At this time, the acrylic resin is characterized in that it is a mixed resin formed by mixing 50 to 60 parts by weight of the butyl acrylate, 25 to 35 parts by weight of the styrene, and 10 to 15 parts by weight of the acrylamide.

In addition, the filler is characterized in that the porous ceramic powder containing aluminum silicate (Aluminum silicate) as a main component.

On the other hand, after the step of adding the filler, a pH adjusting agent composed of 2-amino-2-methyl-1-propanol is added to the resin mixture solution to increase the acidity of the resin mixture solution. It is characterized in that it further comprises a; pH adjuster addition step to adjust the.

In addition, the solvent is characterized in that it is formed by adding and mixing at least one additive selected from a viscosity agent, an antifoaming agent, a dispersing agent, an antifreezing agent, an antibacterial agent and a TG regulator in an inorganic solvent.

At this time, the antimicrobial agent is characterized in that consisting of methylisothiazolinone (Methylisothiazolinone).

According to the present invention, it is applied to a packaging material made of inexpensive paper material to provide insulation, water resistance, and oil resistance, so that when transporting and storing various items that may deteriorate due to temperature changes using the packaging material, the cold storage state is maintained as much as possible to obtain the best It has the advantage of being able to provide freshness.

In addition, according to the present invention, it is applied to a packaging material made of paper, but there is an advantage in that it is environmentally friendly because no harmful substances such as environmental hormones are discharged during incineration of the packaging material.

1 is a process flow chart showing a method for manufacturing a coating composition for an eco-friendly cold packaging material according to the present invention.
Figure 2 is a graph of the change in temperature of the coating composition for eco-friendly cold packaging material produced by the manufacturing method according to a preferred embodiment of the present invention.

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the detailed description of the following embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, only these embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs. It is provided to fully inform the holder of the scope of the invention, and the present invention is only defined by the scope of the claims.

With reference to the accompanying drawings below, specific details for the practice of the present invention will be described in detail. Like reference numbers refer to like elements, regardless of drawing, and "and/or" includes each and every combination of one or more of the recited items.

Terminology used in this specification is for describing the embodiments, and is not intended to limit the present invention. In this specification, singular forms also include plural forms unless specifically stated otherwise in a phrase. As used herein, "comprises" and/or "comprising" does not exclude the presence or addition of one or more other elements other than the recited elements.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used in a meaning commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless explicitly specifically defined.

Hereinafter, a method for manufacturing a coating composition solution for an eco-friendly cold packaging material according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a process flow chart showing a method for manufacturing a coating composition solution for an eco-friendly cold packaging material according to the present invention.

As shown in FIG. 1, the manufacturing method of the coating composition for an eco-friendly cold packaging material includes a resin mixture solution preparation step (S20), a filler addition step (S30), a pH adjustment step (S40) and a viscosity adjustment step (S60). .

Specifically, first, the resin mixture solution preparation step (S20) is a step for preparing a resin mixture solution in which the coating composition acrylic resin is mixed, and 30 to 60 parts by weight of the acrylic resin is mixed with 20 to 30 parts by weight of the solvent at room temperature. It can be dissolved in parts by weight to prepare a resin mixture solution.

At this time, the acrylic resin is a mixed resin composed of butyl acrylate, styrene and acrylamide, preferably 50 to 60 butyl acrylate based on 100 parts by weight of the acrylic resin It may be formed by mixing 25 to 35 parts by weight of the styrene and 10 to 15 parts by weight of the acrylamide.

In addition, the solvent is one or more additives selected from a viscosity agent, an antifoaming agent, a dispersing agent, an antifreeze agent, an antibacterial agent, and a TG regulator in an inorganic solvent through the solvent preparation step (S10) performed prior to the resin mixture solution preparation step (S20) It is formed by adding and mixing, and is preferably added sequentially to water, a representative inorganic solvent, in the order of a viscosity agent, an antifoaming agent, a dispersing agent, an antifreezing agent, an antibacterial agent, a viscosity agent, a TG regulator, and a dispersing agent to obtain a predetermined viscosity. form the solvent.

In this case, the viscosity agent may be an acrylic copolymer.

In addition, the antifoaming agent is added to ensure that a mixing reaction can stably occur between materials included in the coating composition in a process to be followed after the solvent preparation step (S10), preferably using a nonionic surfactant. More preferably, one or a mixture of two or more selected from the group consisting of sodium lauryl sulfate, stearyltrimethylammonium, and polyoxyethylene alkyl ether is used. can

In addition, the dispersing agent is TiO ₂ , and the dispersing agent enables mixing of the resin and the filler to be described later, and enables the coating composition to provide UV absorption and antibacterial effects through photocatalytic activity.

In addition, the antibacterial agent is methylisothiazolinone, and as is well known, methylisothiazolinone is a heterocyclic organic compound that has an antibacterial action of inhibiting the growth of bacteria, yeast, and fungi. Even if the packaging material coated with the composition solution contains foods or medicines, the antibacterial function can be sufficiently exhibited so as not to deteriorate easily.

Meanwhile, after the resin mixture solution preparation step (S20), the filler addition step (S30) of adding a filler to the resin mixture solution is performed.

In the filler adding step (S30), 10 to 40 parts by weight of the filler is added, and at this time, a porous ceramic powder containing aluminum silicate as a main component may be used as the filler.

The porous ceramic powder, mainly composed of aluminum silicate used as the filler, has a minimum surface area per volume, a specific gravity of about 0.15 to 0.18, a strong compressive strength, a low shrinkage rate, and a thermal conductivity of about 0.04 kcal/m2.hr. Since it is within .° C., it can play a role in enhancing durability so that the packaging material coated with the coating composition liquid can not only provide heat insulation so that it can sufficiently exhibit the cooling and warming functions, but also prevent the packaging material made of paper from being easily damaged by external force.

Next, the resin mixture solution to which the filler is added is prepared as a coating composition having a predetermined acidity (pH) and a predetermined viscosity by sequentially performing the pH adjusting step (S40) and the viscosity adjusting step (S60). .

Preferably, in the pH adjusting step (S40) after the filler addition step (S30), 2-amino-2-methyl-1-propanol is added to the resin mixture solution. The acidity of the resin mixture solution is adjusted by adding a pH adjuster formed, and in the viscosity control step (S60), 1 to 5 parts by weight of a viscosity agent composed of an acrylic copolymer is added to the resin mixture solution and stirred, thereby Not only can the adhesion efficiency of the coating composition liquid be realized to a certain level, but also a coating composition liquid having a certain level of viscosity capable of effectively shortening the drying time of the coating composition liquid can be obtained.

On the other hand, prior to performing the viscosity adjusting step (S60), an antifoaming agent is additionally added and mixed with the resin mixture solution having a predetermined acidity so that a stable reaction can occur when the resin mixture solution is mixed with additives. An addition step (S50) may be additionally performed.

At this time, the antifoaming agent may be a nonionic surfactant used in the solvent preparation step (S10), preferably sodium lauryl sulfate (Sodium Lauryl Sulfate), stearyltrimethylammonium chloride (Stearyltrimethylammonium) and polyoxyethylene alkyl ether (polyoxyethylene alkyl ether) can be used by mixing one or two or more selected from the group consisting of.

Next, the present invention will be described in more detail by specific examples and test examples of the present invention.

Example 1

After preparing a solvent by sequentially adding a viscosity agent, an antifoaming agent, a dispersing agent, an antifreeze agent, an antibacterial agent, and a TG regulator to water, an inorganic solvent, butyl acrylate and styrene in a ratio of 6: 3: 1 to 25 g of the solvent A resin mixture solution was prepared by dissolving 45 g of an acrylic resin composed of a mixture of (Styrene) and acrylamide, and 10 g of porous ceramic powder containing aluminum silicate as a main component was added to the resin mixture solution and mixed.

Thereafter, 1 g of Dow Corning's AMP-95 as a pH adjusting agent was mixed with the resin mixture solution to which the filler was added, and sodium lauryl sulfate, stearyltrimethylammonium chloride, and polyoxyethylene alkyl ether (polyoxyethylene alkyl ether) was formed by mixing 1 g of a nonionic surfactant and 3 g of Dow Corning's ASE-60 as a viscosity agent were additionally added and sufficiently stirred to prepare a coating composition.

Example 2

After preparing a solvent by sequentially adding a viscosity agent, an antifoaming agent, a dispersing agent, an antifreeze agent, an antibacterial agent, and a TG regulator to water, an inorganic solvent, butyl acrylate and styrene in a ratio of 6: 3: 1 to 25 g of the solvent A resin mixture solution was prepared by dissolving 45 g of an acrylic resin composed of a mixture of (Styrene) and acrylamide, and 20 g of porous ceramic powder containing aluminum silicate as a main component was added to the resin mixture solution and mixed.

Thereafter, 1 g of Dow Corning's AMP-95 as a pH adjusting agent was mixed with the resin mixture solution to which the filler was added, and sodium lauryl sulfate, stearyltrimethylammonium chloride, and polyoxyethylene alkyl ether (polyoxyethylene alkyl ether) was formed by mixing 1 g of a nonionic surfactant and 3 g of Dow Corning's ASE-60 as a viscosity agent were additionally added and sufficiently stirred to prepare a coating composition.

Example 3

After preparing a solvent by sequentially adding a viscosity agent, an antifoaming agent, a dispersing agent, an antifreeze agent, an antibacterial agent, and a TG regulator to water, an inorganic solvent, butyl acrylate and styrene in a ratio of 6: 3: 1 to 25 g of the solvent A resin mixture solution was prepared by dissolving 45 g of an acrylic resin composed of a mixture of (Styrene) and acrylamide, and 35 g of porous ceramic powder containing aluminum silicate as a main component was added to the resin mixture solution and mixed.

Thereafter, 1 g of Dow Corning's AMP-95 as a pH adjusting agent was mixed with the resin mixture solution to which the filler was added, and sodium lauryl sulfate, stearyltrimethylammonium chloride, and polyoxyethylene alkyl ether (polyoxyethylene alkyl ether) was formed by mixing 1 g of a nonionic surfactant and 3 g of Dow Corning's ASE-60 as a viscosity agent were additionally added and sufficiently stirred to prepare a coating composition.

Preparation Examples 1 to 3

After preparing three sheets of corrugated cardboard base paper and applying Example 1, Example 2, and Example 3 to a certain thickness on each side, drying at room temperature for 72 hours, the coating layer made of the coating composition solution according to Examples 1 to 3 The formed coated papers were manufactured, and then, the coated papers were prepared in Box-shaped Preparation Examples 1 to 3, respectively.

Experimental example

Two ice packs of 300 ml each were placed in a cold box (hereinafter, referred to as 'Comparative Example') made of Production Examples 1 to 3 and expanded polystyrene (EPS), and the temperature change trend was observed at room temperature for 600 minutes, and the cooling power was compared.

As shown in FIG. 2, Preparation Examples 1 to 3 showed similar temperature change trends with each other, although there was a difference in temperature measurement values, and unlike Comparative Example, in which the temperature rapidly changed in some sections, Preparation Examples 1 to 3 In Example 3, it was confirmed that the temperature gradually changed for about 500 minutes and had a continuous and uniform warming power.

In addition, in the case of Preparation Example 1 and Preparation Example 2, a section in which the temperature was measured higher than in Comparative Example was confirmed, whereas in the case of Preparation Example 3, a relatively low temperature was measured compared to Comparative Example and the insulation property was excellent. appeared to be

Although the embodiments of the present invention have been described with reference to the above and accompanying drawings, those skilled in the art to which the present invention pertains can implement the present invention in other specific forms without changing the technical spirit or essential features. You will understand that there is Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

S10: solvent preparation step
S20: Resin mixed solution manufacturing step
S30: Filler addition step
S40: pH adjustment step
S50: defoaming agent addition step
S60: viscosity control step

Claims (13)

In the coating composition for packaging materials that is environmentally friendly and applied to the packaging materials to improve the thermal insulation, water resistance and oil resistance of the packaging materials,
30 to 60 parts by weight of an acrylic resin composed of butyl acrylate, styrene and acrylamide;
1 to 5 parts by weight of a viscosity agent composed of an acrylic copolymer;
10 to 40 parts by weight of filler; and
20 to 30 parts by weight of solvent; Eco-friendly cold packaging coating composition containing a solution.
According to claim 1,
The acrylic resin,
A coating composition for an eco-friendly cold packaging material, characterized in that it is a mixed resin formed by mixing 50 to 60 parts by weight of the butyl acrylate, 25 to 35 parts by weight of the styrene, and 10 to 15 parts by weight of the acrylamide.
According to claim 1,
The filler,
Coating composition for eco-friendly cold packaging, characterized in that it is a porous ceramic powder containing aluminum silicate as a main component.
According to claim 1,
0.01 to 3 parts by weight of a pH adjusting agent made of 2-amino-2-methyl-1-propanol;
According to claim 1,
The solvent is
A method for producing a coating composition solution for eco-friendly cold packaging, characterized in that it is formed by adding and mixing at least one additive selected from a viscosity agent, an antifoaming agent, a dispersing agent, an antifreeze agent, an antibacterial agent and a TG regulator in an inorganic solvent.
According to claim 5,
The antibacterial agent,
Method for producing a coating composition solution for eco-friendly cold packaging, characterized in that consisting of methylisothiazolinone (Methylisothiazolinone).
In the manufacturing method of a coating composition solution for packaging materials that is environmentally friendly and applied to packaging materials to improve thermal insulation, water resistance and oil resistance of packaging materials,
A resin mixture solution preparation step of preparing a resin mixture solution by dissolving an acrylic resin composed of butyl acrylate, styrene, and acrylamide in a solvent at room temperature;
A filler addition step of adding and mixing a filler into the resin mixture solution; and
A method for producing a coating composition solution for an eco-friendly cold packaging material comprising a viscosity control step of obtaining a coating composition solution having a predetermined viscosity by adding a viscosity agent to the resin mixture solution to which the filler is added.
According to claim 7,
The coating composition solution,
30 to 60 parts by weight of the acrylic resin, 1 to 5 parts by weight of the viscosity agent, 10 to 40 parts by weight of the filler, and 20 to 30 parts by weight of the solvent. .
According to claim 7,
The acrylic resin,
50 to 60 parts by weight of the butyl acrylate, 25 to 35 parts by weight of the styrene, and 10 to 15 parts by weight of the acrylamide, characterized in that it is a mixed resin formed by mixing.
According to claim 7,
The filler,
A method for producing a coating composition solution for an eco-friendly cold packaging material, characterized in that it is a porous ceramic powder containing aluminum silicate as a main component.
According to claim 7,
After the step of adding the filler, a pH adjusting agent composed of 2-amino-2-methyl-1-propanol is added to the resin mixture solution to adjust the acidity of the resin mixture solution. A method for producing a coating composition solution for an eco-friendly cold packaging material, characterized in that it further comprises a pH adjusting agent addition step.
According to claim 7,
The solvent is
A method for producing a coating composition solution for eco-friendly cold packaging, characterized in that it is formed by adding and mixing at least one additive selected from a viscosity agent, an antifoaming agent, a dispersing agent, an antifreeze agent, an antibacterial agent and a TG regulator in an inorganic solvent.
According to claim 12,
The antibacterial agent,
Method for producing a coating composition solution for eco-friendly cold packaging, characterized in that consisting of methylisothiazolinone (Methylisothiazolinone).

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