Environmentally friendly and easily recyclable refrigerant and packaging box containing the same

Abstract

The easily-recyclable eco-friendly refrigerant of one embodiment of the present invention includes recyclable cellulose fibers, a first envelope having a first inner face and a first outer face, a second envelope having a second inner face and a second outer face, a first inner resin coating layer formed on the first inner face of the first envelope, a second inner resin coating layer formed on the second inner face of the second envelope, and a paper container in which the cellulose fibers are contained in the inside and the edges of the first envelope and the second envelope are sealed in a manner that does not allow the cellulose fibers to leak to the outside. The first envelope and the second envelope are both made of paper, have the same size, and are formed in a manner that faces each other.

Description

Technical Field

[0001] This invention relates to an easily recyclable environmentally friendly coolant and a packaging box containing the same, and more specifically, to an easily recyclable environmentally friendly coolant and a packaging box containing the same, which is used to seal a double-sided coated paper container after filling it with cellulose material obtained by crushing recycled paper. Background Technology

[0002] In recent years, with the development of the transportation industry, in addition to goods without expiration dates, it is also possible to transport food that requires rapid delivery. Food spoils quickly when exposed to room temperature, so it must be preserved at low temperatures to maintain freshness.

[0003] Therefore, when transporting food, the transport vehicle needs a separate facility capable of freezing and refrigerating. However, when transporting small quantities of food individually rather than large quantities of ingredients or frozen foods, dry ice or ice packs should be placed inside the food containers to prevent spoilage.

[0004] Dry ice is a coolant obtained by compressing gaseous carbon dioxide into solid carbon dioxide. This process requires a separate manufacturing step and is therefore not easily achieved. Furthermore, due to its extremely low temperature of -78°C, handling it with bare hands could cause frostbite, necessitating careful handling and storage. Additionally, if not stored below -78°C, it will sublimate and disappear, rendering it a disposable coolant with low efficiency.

[0005] On the other hand, ice packs contain a refrigerant with a high specific heat. The refrigerant is mixed with water and then frozen for use, thus maintaining a low temperature in the surrounding area through the ice pack's heat absorption. Unlike dry ice, these ice packs are easier to handle and store, and can be used semi-permanently, hence their widespread use.

[0006] Ice packs beyond the required quantity will take up space inside the refrigerator and therefore need to be disposed of. However, when ammonium nitrate or ammonium chloride is used as a refrigerant, these substances are harmful and therefore not easy to dispose of. When super absorbent polymers made of environmentally friendly materials are used as a refrigerant, they will maintain a gel form after combining with water. Therefore, although users can dispose of them by pouring them down the drain, this will have the negative effect of clogging the drain.

[0007] Due to the aforementioned issues, although the ice pack packaging states that it should be disposed of in general waste, users often fail to notice this, and because the packaging is made of vinyl, users frequently end up recycling the coolant and the packaging separately. Furthermore, even when disposed of as general waste, ice packs require separate disposal, making ice pack disposal cumbersome.

[0008] However, in reality, no easily disposable ice pack has been developed to date. Utility Model Registration No. 20-0391355 discloses an "instant cooling gel bag", which is an ice pack containing a separate substance inside and has a structure that allows the user to manually mix the substance and refrigerant when needed.

[0009] The aforementioned prior art provides an instant cooling gel bag that maintains the gel form, characterized in that it comprises an outer skin made of a synthetic resin film, a separation bag sealed inside the outer skin and containing water, and a mixture of heat-absorbing powder and natural water-soluble polymer powder sealed inside the outer skin. When in use, a touch will mix the heat-absorbing powder and water inside the bag, without the need for equipment such as a freezer, and a touch will immediately show a rapid cooling effect.

[0010] However, there is no existing technology that can solve the problems caused by the disposal of ice packs, and the separation bag sealed in the outer skin is simply used by breaking it with a single touch. Therefore, even if the user does not do it intentionally, the separation bag may break due to external force.

[0011] Therefore, there is a need for a cold insulator and packaging box that can solve the problems caused by the disposal of ice packs and can be easily recycled after being disposed of for cold preservation purposes.

[0012] Existing technical documents

[0013] Patent documents

[0014] Patent Document 1: Utility Model Registration No. 20-0391355 (August 1, 2005) Summary of the Invention

[0015] The problem to be solved

[0016] The purpose of this invention is to provide an easily recyclable and environmentally friendly coolant and a packaging box containing the same. The easily recyclable and environmentally friendly coolant utilizes a double-coated paper container to hold cellulose material obtained by crushing recycled paper inside, and then seals it for use.

[0017] Methods for solving problems

[0018] An embodiment of the present invention provides an easily recyclable environmentally friendly refrigerant comprising recyclable cellulose fibers, a first cover having a first inner surface and a first outer surface, a second cover having a second inner surface and a second outer surface, a first inner resin coating formed on the first inner surface of the first cover, a second inner resin coating formed on the second inner surface of the second cover, and a paper container comprising the cellulose fibers internally and sealing the edges of the first and second covers in a manner that prevents the cellulose fibers from leaking outwards. The first and second covers are both made of paper, have the same size, and are formed facing each other.

[0019] In addition, the first and second covers are made of kraft paper made from sulfate pulp (SP) or kraft pulp (KP). When the edges of the first and second covers are sealed to form the paper container, the first inner resin coating of the first cover and the second inner resin coating of the second cover can be heat-sealed.

[0020] Additionally, it may include a first external resin coating formed on the first external surface of the first cover and a second external resin coating formed on the second external surface of the second cover.

[0021] In addition, both the first and second internal resin coatings can be formed from a polyethylene (PE) film layer.

[0022] Furthermore, both the first and second internal resin coatings mentioned above can have a density of 0.91–0.94 g / cm³ in their solid state. 3 Low-density polyethylene (LDPE) film layer.

[0023] Additionally, it may include a first external resin coating formed on the first outer surface of the first cover and a second external resin coating formed on the second outer surface of the second cover. Both the first and second external resin coatings can be formed from a polyethylene (PE) film, and both the first and second external resin coatings can have a density of 0.91–0.94 g / cm³ in their solid state. 3 Low-density polyethylene (LDPE) film layer.

[0024] In addition, both the first and second internal resin coatings can contain copolymer resins containing organosilicon polymers and acrylic polymers.

[0025] Furthermore, based on the total weight of the first and second internal resin coatings, each of the first and second internal resin coatings contains 10 to 50% by weight of the copolymer resin, and the weight ratio of the organosilicon polymer to the acrylic polymer is 1:99 to 30:70. In accordance with the test method for degradable synthetic resin materials, namely KS M3100-1 (method for determination of aerobic biodegradability and disintegration of plastics under composting conditions), when biodegradability is defined as the percentage change in biodegradability between the sample and the standard substance after 180 days, the biodegradability of the first and second internal resin coatings can be 84 to 85%, and the first and second internal resin coatings can dissociate in alkali.

[0026] In addition, it also includes a first external resin coating formed on the first outer surface of the first cover and a second external resin coating formed on the second outer surface of the second cover. Both the first and second external resin coatings contain a copolymer resin containing organosilicon polymers and acrylic polymers. Based on the total weight of the first and second external resin coatings, each of the first and second external resin coatings contains 10 to 50% by weight of the copolymer resin. The weight ratio of the organosilicon polymer to the acrylic polymer is 1:99 to 30:70. According to the test method for degradable synthetic resin materials, namely KS M3100-1 (method for determination of aerobic biodegradability and disintegration of plastics under composting conditions), when biodegradability is defined as the percentage change in biodegradability of the sample and the standard substance over 180 days, the biodegradability of the first and second external resin coatings can be 84 to 85%, and the first and second external resin coatings can dissociate in alkali.

[0027] A packaging box containing the easily recyclable environmentally friendly coolant of the present invention comprises a coolant and a packaging box. The coolant comprises recyclable cellulose fibers, a first cover having a first inner surface and a first outer surface, a second cover having a second inner surface and a second outer surface, a first inner resin coating formed on the first inner surface of the first cover, a second inner resin coating formed on the second inner surface of the second cover, and a paper container comprising the cellulose fibers inside and sealing the edges of the first and second covers in a manner that prevents the cellulose fibers from leaking outward. The packaging box comprises corrugated paper, which comprises an outer face paper exposed to the outside of the box, an inner face paper constituting the inside of the box, and a corrugated core. The corrugated core is formed between the outer face paper and the inner face paper to impart thickness to the corrugated paper and provide elasticity against compression upon impact while increasing strength and flexibility.

[0028] In addition, the aforementioned packaging box may include a bottom surface formed flat in a manner capable of holding contents, a lid formed facing the bottom surface and in a manner for covering the packaging box, and a first side, a second side, a third side, and a fourth side respectively connected to the bottom surface. The first and third sides may be formed facing each other, and the second and fourth sides may be formed facing each other. The aforementioned cold-keeping agent may include a first cold-keeping agent and a second cold-keeping agent. The first and second cold-keeping agents may have the same appearance as each other. The first cold-keeping agent may be disposed in contact with the first, second, and third sides, and the second cold-keeping agent may be disposed in contact with the bottom surface, the fourth side, and the lid.

[0029] Invention Effects

[0030] According to the present invention, an environmentally friendly coolant and a packaging box containing the same can provide an easily recyclable environmentally friendly coolant and a packaging box containing the same, which can be sealed after being filled with cellulose material obtained by crushing recycled paper using a double-sided coated paper container. Attached Figure Description

[0031] Figure 1 This is a photograph showing an actual environmentally friendly refrigerant product of the present invention.

[0032] Figure 2 This is a cross-sectional view showing the environmentally friendly refrigerant of the present invention.

[0033] Figure 3 This is a photograph showing a cross-section of an actual environmentally friendly refrigerant product of the present invention.

[0034] Figure 4 This is a diagram illustrating a packaging box containing an easily recyclable, environmentally friendly refrigerant according to the present invention.

[0035] Figure 5 The image shows a photograph of how items are preserved in a packaging box product containing an easily recyclable environmentally friendly coolant, in accordance with the present invention.

[0036] Figure 6 This is a cross-sectional view showing the packaging box of the present invention.

[0037] Figure 7 This is a chart summarizing the comparative experimental results of the performance of traditional refrigerants and the refrigerant of this invention.

[0038] (Symbol Marking Explanation)

[0039] 10: Packaging box 11: Inner face paper

[0040] 12: Outer liner paper; 13: Corrugated core

[0041] 14: Bottom surface 15: First side surface

[0042] 16: Second side view 17: Third side view

[0043] 18: Fourth side view 19: Cover

[0044] 20: Refrigerant 21: Primary Refrigerant

[0045] 22: Second cold insulation agent 23: First cover

[0046] 24: First internal resin coating; 25: First external resin coating

[0047] 26: Second cover 27: Second inner resin coating

[0048] 28: Second external resin coating; 29: Cellulose fiber. Detailed Implementation

[0049] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings to facilitate implementation by those skilled in the art. The present invention can be implemented in a variety of different ways and is not limited to the embodiments described herein.

[0050] It is important to note that the accompanying drawings are schematic and not drawn to scale. The relative dimensions and ratios of the parts shown in the drawings have been exaggerated or reduced for clarity and convenience; any dimensions are illustrative only and not limiting. Furthermore, the same structures, elements, or components appearing in more than one drawing use the same reference numerals to indicate similar features.

[0051] The embodiments of the present invention specifically illustrate the preferred embodiments of the invention. Therefore, various variations are expected in the illustrations. Thus, the embodiments are not limited to the specific form of the illustrated region, but also include variations based on manufacturing processes.

[0052] Figure 1 This is a photograph showing an actual environmentally friendly refrigerant product of the present invention.

[0053] Figure 2 This is a cross-sectional view showing the environmentally friendly refrigerant of the present invention.

[0054] Figure 3 This is a photograph showing a cross-section of an actual environmentally friendly refrigerant product of the present invention.

[0055] An embodiment of the present invention provides an easily recyclable environmentally friendly refrigerant comprising recyclable cellulose fibers, a first cover having a first inner surface and a first outer surface, a second cover having a second inner surface and a second outer surface, a first inner resin coating formed on the first inner surface of the first cover, a second inner resin coating formed on the second inner surface of the second cover, and a paper container comprising the cellulose fibers internally and sealing the edges of the first and second covers in a manner that prevents the cellulose fibers from leaking outwards. The first and second covers are both made of paper, have the same size, and are formed facing each other.

[0056] Cellulose fibers are characterized by their rough surface and the presence of countless micropores (dimples) to prevent airflow. The multiple air layers formed by the interweaving of these fibers effectively block the movement of heat, resulting in excellent thermal insulation (cold retention).

[0057] In this invention, the cellulose fibers used to improve the cold-keeping effect can be easily recycled. To improve the recycling efficiency, the cellulose fibers used can be shredded waste paper such as newspapers collected from recycling, rather than ordinary cellulose materials such as cotton fibers.

[0058] Because this invention incorporates and seals cellulose fibers with excellent thermal insulation (cold retention) properties inside a paper container, both the internal insulation material and the external cover are made of paper, thus offering the advantage of being disposable after use.

[0059] Traditional ice packs use a gel-like superabsorbent resin as a refrigerant inside. When disposed of in drains, this can cause blockages due to water absorption. Therefore, ice pack manufacturers or separate collection companies must collect and dispose of them. In this case, the disposal cost is higher than the production cost of the ice packs, resulting in adverse effects on both the environment and the economy.

[0060] Cellulose, the main component of plant cell walls, constitutes plant fibers and is therefore also called cellulose. It is a high-molecular-weight compound composed of D-glucose linked in a straight chain by (1→4)-β-glycosidic bonds. Cellulose is obtained by degreasing cotton fibers and boiling them in a dilute alkaline aqueous solution; it is a tasteless white solid and insoluble in water. It is quite resistant to alkalis, but it undergoes hydrolysis in acids to form glucose, generating a large amount of cellobiose compounds before breaking down into glucose. Cellulose is an abundant organic compound found in nature, second only to coal in abundance, and is an important industrial resource. Cellulose molecules aggregate in large quantities to form fibers; its smallest unit is called a micelle, with a diameter of 0.05 nm and a length of 0.6 nm or more.

[0061] Cellulose fibers come in various types depending on their size and insulation properties. In this invention, optimal values ​​were determined through experiments using cellulose fibers with a wide range of physical properties. Ultimately, a density of 30 kg / m³ was found to be preferred. 3 ~100kg / m 3 Cellulose fibers with a thermal conductivity of 0.01–0.3 W / mk (at 20°C) and a moisture permeability resistance coefficient (minimum / maximum) of 1 / 3–2 / 3 μ.

[0062] Both the first and second covers mentioned above are made of paper, preferably kraft paper made from sulfate pulp (SP) or kraft pulp (KP). Kraft paper is a packaging paper made primarily from chemical pulp and possesses better tensile strength, tear strength, and elongation than other packaging papers, thus preventing packaging breakage. Furthermore, to improve the elongation of kraft paper, it is preferable to add fine pleats to the paper during production on the paper machine.

[0063] In order to contain the cellulose fibers inside the paper container and prevent the cellulose fibers from leaking out, it is preferable to heat-seal the first inner resin coating of the first cover and the second inner resin coating of the second cover when sealing the edges of the first cover and the second cover to form the paper container.

[0064] More specifically, in the heat-sealing method, a first cover and a second cover with the same quadrilateral shape are prepared and placed facing each other, and then three of the four sides are sealed. At this time, the first inner resin coating of the first cover and the second inner resin coating of the second cover are heated to make the first and second inner resin coatings melt, and then they are sealed together.

[0065] Cellulose fibers are evenly injected into the unsealed side of the paper container formed in this way. After injection, the unsealed side is then heat-sealed again to complete the process. Figure 1 The image shows a refrigerant product. The cross-section of such a refrigerant is shown below. Figure 2 As shown, the cross-section of the actual product is as follows: Figure 3 As shown in the photo.

[0066] In this invention, both the first and second internal resin coatings can be composed of a polyethylene (PE) film layer. Polyethylene (PE) is a highly heat-resistant material widely used in kitchenware. Due to its ease of processing, it is used in various product lines and is also a major raw material for plastic bottles. Furthermore, it hardly discolors even after prolonged exposure to sunlight, and because it is a relatively safe material, it is also widely used in children's toys.

[0067] Polyethylene (PE) materials can be classified into high-density, low-density, medium-density, ultra-high-density, and ultra-low-density materials according to their density. In this invention, the polyethylene (PE) film layer preferably uses a solid-state density of 0.91–0.94 g / cm³. 3 Low-density polyethylene (LDPE) film is a synthetic resin produced by polymerizing ethylene. It is a transparent solid at room temperature (density 0.91–0.94), exhibiting low crystallinity, excellent processability, flexibility, and transparency. Therefore, it is used as a raw material for agricultural and packaging transparent films, wire sheathing, and various wrapping materials.

[0068] The present invention may further include a first external resin coating formed on a first outer surface of the first cover and a second external resin coating formed on a second outer surface of the second cover. Both the first and second external resin coatings can be formed from a polyethylene (PE) film layer, and both the first and second external resin coatings can have a density of 0.91–0.94 g / cm³ in their solid state. 3 Low-density polyethylene (LDPE) film layer.

[0069] The reason for adding a first and a second external resin coating is that the material constituting the outer cover is paper, which may be damaged by exposure to external moisture if not treated separately. Therefore, it is preferable to add a first and a second external resin coating to protect the paper container from the intrusion of external contaminant moisture.

[0070] In this invention, both the first internal resin coating and the second internal resin coating can be composed of a water-soluble environmentally friendly copolymer resin layer. Preferably, both the first internal resin coating and the second internal resin coating contain a copolymer resin containing organosilicon polymers and acrylic polymers.

[0071] Furthermore, based on the total weight of the first and second internal resin coatings, each of the first and second internal resin coatings contains 10 to 50% by weight of the copolymer resin, and the weight ratio of the organosilicon polymer to the acrylic polymer is 1:99 to 30:70. In accordance with the test method for degradable synthetic resin materials, namely KS M3100-1 (method for determination of aerobic biodegradability and disintegration of plastics under composting conditions), when biodegradability is defined as the percentage change in biodegradability between the sample and the standard substance over 180 days, the biodegradability of the first and second internal resin coatings is 84 to 85%, and the first and second internal resin coatings dissociate in alkali.

[0072] The method for manufacturing the copolymer resin containing organosilicon polymers and acrylic polymers of the present invention is as follows.

[0073] The copolymer resin of this invention is manufactured via a monomer addition process. Water, reactants, Na₂CO₃, di-n-butyltin dilaurate (DBTDL), and 10% acrylic monomers are added to a reactor with a temperature adjustable to 60°C, and polymerization is initiated. Ammonium persulfate (APS) is added when the temperature reaches 80°C. After 10 minutes, the remaining organosilicon monomers are added to the reactor at a uniform rate over 2 hours. Polymerization is completed within 2 hours.

[0074] In the above process, when adding monomers, the acrylic monomers used are 40g of methyl methacrylate, 44g of butyl acrylate, 1.0g of methacrylic acid, and 1.0g of hydroxyethyl methacrylate. In order to adjust the ratio of acrylic acid to organosilicon, the organosilicon monomer is manufactured by varying the amount of organosilicon monomer between 1% and 25%.

[0075] In the above manufacturing process, 0.2 g of ammonium persulfate, 0.4 g of di-nbutyltin dilaurate (DBTDL), 1.0 g of octyl phenol ethoxylate (OP)-10, 0.8 g of sodium dodecyl sulfate (SDS), 0.2 g of Na₂CO₃, and 120 g of deionized water were added as reactants for polymerization. After polymerization, the mixture was neutralized with ammonia water and the reactants were filtered out, thereby producing the copolymer resin.

[0076] It also includes a first external resin coating formed on the first outer surface of the first cover and a second external resin coating formed on the second outer surface of the second cover. Both the first and second external resin coatings contain a copolymer resin containing an organosilicon polymer and an acrylic polymer. Based on the total weight of the first and second external resin coatings, each of the first and second external resin coatings contains 10 to 50% by weight of the copolymer resin. The weight ratio of the organosilicon polymer to the acrylic polymer is 1:99 to 30:70. According to the test method for degradable synthetic resin materials, namely KS M3100-1 (method for determination of aerobic biodegradability and disintegration of plastics under composting conditions), when biodegradability is defined as the percentage change in biodegradability of the sample and the standard substance over 180 days, the biodegradability of the first and second external resin coatings can be 84 to 85%, and the first and second external resin coatings can dissociate in alkali.

[0077] In this invention, the coolant can be formed into an unfolded shape having the number of internal faces of a packaging bag, so that articles can be placed inside it and the coolant itself can be used as a packaging bag (not shown). That is, the coolant itself can be used as a packaging bag. In this case, it is not preferable that the first and second covers are not divided into a certain shape, but rather that the coolant is formed into an unfolded shape consisting of divided faces according to the shape of the packaging bag.

[0078] For example, when the top of a packaging bag (not shown) is joined using a zipper, button, or other connecting mechanism, since the packaging bag consists of four sides and one bottom surface, it can be formed into an unfolded pattern divided into five faces. If the packaging bag has a hexahedral shape consisting of six faces, like the packaging box described later, then the packaging bag is also formed into an unfolded pattern divided into six faces. In this case, to improve the mobility of the packaging bag, it is preferable to attach a handle, and it is preferable not to form the top surface of the packaging bag as described above, but to form a connecting mechanism such as a zipper or button to join the top of two sides.

[0079] However, for the coolant used inside the packaging box, as described later, since the coolant can be easily used to conform to the shape of the packaging box by simply folding the rectangular shape twice, it can also be formed as an undivided rectangular shape instead of an unfolded shape. Of course, it is also possible to form a divided unfolded shape so that it can be folded twice.

[0080] Figure 4 This is a diagram illustrating a packaging box containing an easily recyclable, environmentally friendly refrigerant according to the present invention.

[0081] Figure 5 The image shows a photograph of how items are preserved in a packaging box product containing an easily recyclable environmentally friendly coolant, in accordance with the present invention.

[0082] Figure 6 This is a cross-sectional view showing the packaging box of the present invention.

[0083] A packaging box containing the easily recyclable environmentally friendly coolant of the present invention comprises a coolant and a packaging box. The coolant comprises recyclable cellulose fibers, a first cover having a first inner surface and a first outer surface, a second cover having a second inner surface and a second outer surface, a first inner resin coating formed on the first inner surface of the first cover, a second inner resin coating formed on the second inner surface of the second cover, and a paper container comprising the cellulose fibers inside and sealing the edges of the first and second covers in a manner that prevents the cellulose fibers from leaking outward. The packaging box comprises corrugated paper, which comprises an outer face paper exposed to the outside of the box, an inner face paper constituting the inside of the box, and a corrugated core. The corrugated core is formed between the outer face paper and the inner face paper to impart thickness to the corrugated paper and provide elasticity against compression upon impact while increasing strength and flexibility.

[0084] The description of the cold-insulating agent is as described above. Corrugated paper is a type of cardboard made by bonding a corrugated core to the inner and outer linerboard using an adhesive. Its composition is as follows... Figure 6 Corrugated paper is categorized into double-sided, double-sided, and triple-sided types. The outer liner provides resistance to mechanical shocks and weather conditions; the outer liner is used for printing. The corrugated core gives the corrugated paper thickness and provides elasticity against compression during impact, increasing strength and flexibility. Corrugated paper can exhibit high compressive strength while using relatively lightweight materials. Depending on the application, it is divided into outer packaging and inner packaging.

[0085] In addition, such as Figure 4 and Figure 5 As shown, the aforementioned packaging box may include a bottom surface formed flat in a manner capable of holding contents, a lid formed facing the bottom surface and in a manner for covering the packaging box, and a first side, a second side, a third side, and a fourth side respectively connected to the bottom surface. The first and third sides may be formed facing each other, and the second and fourth sides may be formed facing each other. The aforementioned coolant may include a first coolant and a second coolant. The first and second coolants may have the same appearance. The first coolant may be disposed in contact with the first, second, and third sides, and the second coolant may be disposed in contact with the bottom surface, the fourth side, and the lid.

[0086] With this configuration, the first and second cold insulators encapsulate all six sides of the packaging box to maximize the cold insulation effect and simplify the packaging process. After use, it can be disposed of as recyclable waste (paper) without any separate measures, thereby maximizing its effectiveness.

[0087] Figure 7 This is a graph summarizing the comparative experimental results of the performance of conventional refrigerants and the refrigerant of the present invention. In the graph, EPS liner represents an expanded polystyrene (EPS) box, and Cellulose liner represents a packaging box of the present invention containing a first refrigerant and a second refrigerant.

[0088] As shown in the graph, although the initial starting temperature is the same at 25 degrees Celsius, assuming the minimum temperature required for refrigerated food is 10 degrees Celsius (red box in the graph), the traditional expanded polystyrene (EPS) box maintains the minimum temperature for less than 8 hours, while the packaging box of the present invention, containing both a first and a second refrigerant, maintains the minimum temperature for 20 hours. That is, the easily recyclable and environmentally friendly refrigerant of the present invention, and the packaging box using it, will exhibit significant advantages due to their convenience (easy disposal of recyclables) and environmental friendliness, provided the refrigerant's cooling effect is the same as existing products. Experimental results confirm that it is more advantageous than traditional refrigerants and has an overwhelmingly significant effect compared to existing known technologies in all aspects.

[0089] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, those skilled in the art should understand that the present invention can be implemented in other specific forms without changing its technical concept or essential features.

[0090] Therefore, the above embodiments should be understood as illustrative rather than restrictive in all respects, and the scope of the invention is indicated by the above detailed description and the scope of the claims described below, and all modifications or variations derived from the meaning and scope of the claims and their equivalents should be interpreted as being included within the scope of the invention.

Claims

1. An easily recyclable and environmentally friendly refrigerant, characterized in that, Include: Recyclable cellulose fibers; A first cover having a first inner surface and a first outer surface; A second cover having a second inner surface and a second outer surface; A first internal resin coating formed on the first internal surface of the first cover; A second internal resin coating formed on the second internal surface of the second cover; as well as A paper container comprising the cellulose fibers inside and sealing the edges of the first and second covers in a manner that prevents the cellulose fibers from leaking out. Both the first cover and the second cover are made of paper, have the same size, and are formed facing each other.

2. The easily recyclable environmentally friendly refrigerant according to claim 1, characterized in that, When forming the paper container by sealing the edges of the first and second covers, the sealing is achieved by heat sealing the first inner resin coating of the first cover and the second inner resin coating of the second cover.

3. The easily recyclable environmentally friendly refrigerant according to claim 2, characterized in that, Both the first and second internal resin coatings are formed of polyethylene (PE) film layers.

4. The easily recyclable environmentally friendly refrigerant according to claim 3, characterized in that, The density of both the first and second internal resin coatings when in solid state is 0.91–0.94 g / cm³. 3 Low-density polyethylene (LDPE) film layer.

5. The easily recyclable environmentally friendly refrigerant according to claim 4, characterized in that, It also includes a first external resin coating formed on a first external surface of the first cover and a second external resin coating formed on a second external surface of the second cover.

6. The easily recyclable environmentally friendly refrigerant according to claim 5, characterized in that, Both the first and second external resin coatings are formed of polyethylene (PE) film layers, and both the first and second external resin coatings have a density of 0.91–0.94 g / cm³ when in solid state. 3 Low-density polyethylene (LDPE) film layer.

7. The easily recyclable environmentally friendly refrigerant according to claim 2, characterized in that, Both the first and second internal resin coatings contain a copolymer resin comprising organosilicon polymers and acrylic polymers.

8. The easily recyclable environmentally friendly refrigerant according to claim 7, characterized in that, Based on the total weight of the first and second internal resin coatings, each of the first and second internal resin coatings contains 10-50% by weight of the copolymer resin. The weight ratio of the organosilicon polymer to the acrylic polymer is 1:99 to 30:

70. According to the test method KS M3100-1 for degradable synthetic resin materials, namely the method for determining the aerobic biodegradability and disintegration degree of plastics under composting conditions, when biodegradability is defined as the percentage change in biodegradability between the sample and the standard substance after 180 days, the biodegradability of the first and second internal resin coatings is 84-85%. The first and second internal resin coatings dissociate in alkali.

9. The easily recyclable environmentally friendly refrigerant according to claim 8, characterized in that, It also includes a first external resin coating formed on a first outer surface of the first cover and a second external resin coating formed on a second outer surface of the second cover, wherein both the first and second external resin coatings contain a copolymer resin comprising organosilicon polymers and acrylic polymers. Based on the total weight of the first and second external resin coatings, each of the first and second external resin coatings contains 10-50% by weight of the copolymer resin. The weight ratio of the organosilicon polymer to the acrylic polymer is 1:99 to 30:

70. According to the test method KS M3100-1 for degradable synthetic resin materials, namely the method for determining the aerobic biodegradability and disintegration degree of plastics under composting conditions, when biodegradability is defined as the percentage change in biodegradability between the sample and the standard substance after 180 days, the biodegradability of the first and second external resin coatings is 84-85%. The first and second external resin coatings dissociate in alkali.

10. The easily recyclable environmentally friendly refrigerant according to claim 6 or 9, characterized in that, The coolant is formed into an unfolded shape having the number of internal faces of a packaging bag, so that the coolant itself is used as the packaging bag when an item is placed inside it.

11. A packaging box containing an easily recyclable, environmentally friendly coolant, characterized in that, Includes coolant and packaging box. The refrigerant comprises recyclable cellulose fibers, a first cover having a first inner surface and a first outer surface, a second cover having a second inner surface and a second outer surface, a first inner resin coating formed on the first inner surface of the first cover, a second inner resin coating formed on the second inner surface of the second cover, and a paper container comprising the cellulose fibers internally and sealing the edges of the first and second covers in a manner that prevents the cellulose fibers from leaking outwards. The packaging box comprises corrugated paper, which includes an outer face paper exposed to the outside of the box, an inner face paper forming the inside of the box, and a corrugated core formed between the outer face paper and the inner face paper to give the corrugated paper thickness and provide elasticity against compression upon impact while increasing strength and flexibility.

12. The packaging box containing an easily recyclable environmentally friendly coolant according to claim 11, characterized in that, The packaging box contains: A flat bottom surface formed in a way that can hold contents; A lid formed opposite to the bottom surface and in a manner that covers the packaging box; The first side surface, the second side surface, the third side surface, and the fourth side surface are respectively connected to the bottom surface. The first side and the third side are formed facing each other. The second and fourth sides are formed facing each other. The cold-insulating agent comprises a first cold-insulating agent and a second cold-insulating agent. The first and second refrigerants have the same appearance as each other. The first refrigerant is configured to contact the first side, the second side, and the third side. The second cold-keeping agent is configured to contact the bottom surface, the fourth side surface, and the cover surface.

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