KR102280421B1 - Environment-friendly ice pack - Google Patents

Abstract

An eco-friendly ice pack is disclosed. The eco-friendly ice pack according to embodiments of the present invention uses paper and water or water as a filling material so that a user can easily separate and discharge it at the time of disposal. In addition, it is intended to provide an eco-friendly ice pack that is easy to handle because of its small deformation and can efficiently use the space for storing fresh food.

Description

Eco-friendly ice pack {ENVIRONMENT-FRIENDLY ICE PACK}

The present invention relates to an eco-friendly ice pack, and more particularly, to an eco-friendly ice pack that is easy to separate and discharge and has less shape deformation.

With the recent development of the transportation industry, the amount of fresh food that requires fast delivery is also increasing. Fresh food spoils quickly when exposed to room temperature, so it should be stored at a low temperature to maintain freshness.

Ice packs are used to insulate items that melt at room temperature, such as fresh food or frozen desserts, and are widely used as a substitute for ice because of their longer usage time than ice.

In general, ice packs contain super absorbent polymer (SAP) and water inside. Superabsorbent polymer is a polymer material that can absorb and retain water hundreds of times to thousands of times its own weight. When water is added, it swells to form a hydrogel. It also has a characteristic that does not drain water easily.

However, the conventional ice pack maintaining the hydrogel form requires a separate disposal treatment when discarding, so it is cumbersome to dispose of. In addition, there is a problem in that the conventional ice pack expands in volume due to hydrogen bonding between water molecules contained in the ice pack during freezing, so that the surface of the ice pack is unevenly deformed or damaged. In particular, the conventional ice pack is frozen in an uneven shape if the surface of the portion on which the ice pack is placed is uneven when freezing. It is difficult to laminate and use an ice pack whose surface has been frozen unevenly. This may limit the efficient use of a space in which fresh food is stored. In addition, if the ice pack is damaged, the hydrogel inside the ice pack may be discharged to the outside, which may affect the items stored together with the ice pack, and the lifespan of the ice pack may be reduced, which may cause a problem of poor competitiveness.

In this regard, Korean Patent Application Laid-Open No. 10-2011-0080738 (Title of the Invention: Ice Pack) proposes an ice pack that allows the shape of the ice pack to be constantly maintained by inserting an implant inside the ice pack. .

Korean Patent Publication No. 10-2011-0080738 (published on July 13, 2011)

An object of the present invention is to provide an eco-friendly ice pack that is easy to separate and discharge and has less shape deformation.

According to one aspect of the present invention, comprising a pair of facing surfaces, a side that is formed to be foldable along the edge of the surface and tapered, and a vertex formed by contacting two adjacent side surfaces and one surface An eco-friendly ice pack having an outer case and an enclosed space formed inside the outer case, wherein the closed space is filled with a filling material including paper and a phase change material, wherein the surface includes first and second surfaces located on the upper portion; and a third surface facing the first and second surfaces, wherein the side surface includes first and second side surfaces facing in a first direction, and third and fourth side surfaces facing in a second direction orthogonal to the first direction, , A first junction is formed so as to extend in a second direction by overlapping one side of the first surface and the second surface to minimize deformation due to the load and external physical force of the filler, the first surface and the second surface In the first side and the second side, respectively, folded along the fold lines formed on the second side, and the fourth and fifth bonding portions overlapping two or more sides are formed in parallel and spaced apart from each other by a predetermined distance, and the paper is in a sheet form in which at least a plurality of layers are stacked and an eco-friendly ice pack in which a beaded paper is provided between the plurality of sheet forms, and the phase change material is water.

Eco-friendly ice packs according to embodiments of the present invention can be easily separated and discharged by a user when discarded by using paper and water as fillings of the ice pack.

In addition, eco-friendly ice packs are less deformed in shape, so that the product life is long, which improves the marketability, and the space for storing fresh food can be used efficiently.

1 is a perspective view of an eco-friendly ice pack according to a first embodiment of the present invention.
2 is a view showing a method of manufacturing an eco-friendly ice pack according to the first embodiment of the present invention.
3 is a cross-sectional view taken along II of FIG. 1 .
4 is a perspective view of an eco-friendly ice pack according to a second embodiment of the present invention.
5 is a view showing a method of manufacturing an eco-friendly ice pack according to the second embodiment of the present invention.
6 is a graph showing the freezeability test results of Examples and Comparative Examples.
7 is a graph showing the temperature test results of Examples and Comparative Examples.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, the following examples are provided to help the understanding of the present invention, and the scope of the present invention is not limited to the following examples. In addition, the following examples are provided to more fully explain the present invention to those of ordinary skill in the art, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

1 is a perspective view of an eco-friendly ice pack 100 according to Embodiment 1 of the present invention. 2 is a view showing a method of manufacturing an eco-friendly ice pack according to the first embodiment of the present invention. FIG. 3 is a cross-sectional view taken along line II of FIG. 1 .

1 to 3 , the eco-friendly ice pack 100 may include an outer case 110 and a filler 120 filled inside the outer case.

Referring to FIGS. 1 and 2 , the outer case 110 is a case forming the exterior of the eco-friendly ice pack 100 , and has a pair of opposing surfaces and a tapered side formed so as to be foldable along the edge of the surface. And, it may include a vertex (P) formed by contacting two adjacent side surfaces and one surface. In addition, the outer case 110 may have a sealed space accommodating the filling material 120 therein.

In this case, the surface includes first and second surfaces 110a and 110b positioned on the upper portion, and a third surface 110c facing the upper surface, and the side surfaces are first and second surfaces facing in the first direction. It may include side surfaces 110d and 110e and third and fourth side surfaces 110f and 110g facing in a second direction orthogonal to the first direction. In this case, the first side surface 110d to the fourth side surface 110g may have an upper side located on the upper side and a lower side surface located on the lower side.

The upper portion of the outer case 110 may be formed with a first bonding portion 111 in which two or more surfaces are stacked by overlapping one side of the first surface 110a and the second surface 110b. The first junction 111 is formed to extend in the second direction on the upper portion of the outer case 110 to support the outer case 110 as a whole, and to minimize deformation due to the load of the filling material 120 and external physical force. . Accordingly, the outer case 110 is firmly supported without inserting or mounting a separate support.

Conventional ice packs have poor durability because their outer packaging is made of polyethylene and nylon. Accordingly, when the conventional ice pack is frozen and then melted, the shape is deformed in the direction in which the center of gravity is concentrated, and thus there is a problem in that handling is difficult. Furthermore, when the ice pack is frozen, the surface of the ice pack may be unevenly formed depending on the surface on which the ice pack is placed, so it is difficult to stack and use the ice pack.

On the other hand, the eco-friendly ice pack 100 supports the outer case 110 and distributes the load of the filler 120 filled inside the outer case 110 as the first junction 111 is formed on the outer case 110 . Thus, it is possible to minimize bending or deformation of the outer case 110 . In addition, it is possible to minimize the deformation of the shape of the outer case 110 even when a physical force is generated from the outside.

A second bonding portion 112 and a third bonding portion 113 may be formed at one end of the third side surface 110f and the fourth side surface 110g.

The first junction part 111 , the second junction part 112 , and the third junction part 113 may seal the outer case 110 so that a sealed space accommodating the filling material 120 is formed inside the outer case 110 . there is.

As shown in FIGS. 1 and 2 , the outer case 110 may be tapered by being foldable along the first side 110a to the third side 110c corner. In this case, the vertex P may be formed at a position where two adjacent side surfaces and one of the first and third surfaces 110a to 110c contact each other. The vertex P may distribute the force when a force by the load of the filler 120 or a physical force occurs from the outside. In one embodiment, when a force by the filler 120 or a physical force is generated from the outside, the vertex P distributes the force in the direction of three corners formed by contacting one side with the neighboring side. . Therefore, the outer case 110 minimizes the shape deformation caused by the filling material 120 or an external physical force.

The outer case 110 may include a pulp layer (not shown) and a resin coating layer (not shown) formed on the pulp layer.

The pulp layer is a main layer constituting the outer case 110 and may be formed of a pulp material. In one embodiment, the pulp material may be a durable cardboard or kraft paper. In this case, the weight of the pulp material may be ^{260 to 300 g/m 2 .} Therefore, durability can be improved compared to conventional ice packs made of polyethylene and nylon. That is, the eco-friendly ice pack 100 is formed of a durable pulp material to minimize shape deformation due to the force caused by the load of the filling material 120 or an external physical force. The pulp material is not limited to those listed above. The pulp layer may have a structure in which a plurality of layers are stacked, if necessary. Accordingly, durability and barrier properties of the outer case 110 may be further improved.

The resin coating layer may be formed on the lower or upper and lower portions of the pulp layer. In one embodiment, the resin coating layer is formed under the pulp layer to prevent moisture generated in the filling material 120 from penetrating into the pulp layer. In another embodiment, the resin coating layer may be formed on the upper and lower portions of the pulp layer to protect the pulp layer, and to prevent the filler 120 or external moisture or contaminants from penetrating into the outer case 110 .

The resin coating layer may be at least one selected from the group consisting of a thermoplastic resin, a copolymer resin including a silicone-based polymer and an acrylic polymer, a biodegradable resin, a water-soluble resin, and a gas barrier resin.

Specifically, the thermoplastic resin is polyethylene, polypropylene, polyisoprene, polyester (polyethylene terephthalate, polybutylene terephthalate, etc.), polybutadiene, styrene resin, impact-resistant polystyrene, acrylonitrile-styrene resin (AS resin) , acrylonitrile-butadiene-styrene resin (ABS resin), methyl methacrylate-butadiene-styrene resin (MBS resin), methyl methacrylate-acrylonitrile-butadiene-styrene resin (MABS resin), acrylonitrile- Acrylic rubber-styrene resin (AAS resin), polymethyl (meth)acrylate, polycarbonate, modified polyphenylene ether (PPE), polyamide, polyphenylene sulfide, polyimide, polyether ether ketone, polysulfone , polyarylate, polyetherketone, polyethernitrile, polythioethersulfone, polyethersulfone, polybenzimidazole, polycarbodiimide, polyamideimide, and may be at least one selected from the group consisting of polyetherimide.

In a copolymer resin comprising a silicone-based polymer and an acrylic polymer, the silicone-based polymer may be one or more selected from the group consisting of polysilane, polysiloxane, polysilazane, and polycarbosilane. In addition, the acrylic polymer is polyacrylate, polymethacrylate, polymethylacrylate, polymethylmethacrylate, polyethylacrylate, polyethylmethacrylate (polyethylmethacrylate) may be one or more selected from the group consisting of.

Biodegradable resins include polylactic acid (PLA), polycaprolactone (PCL), polyglycolic acid (PGA), polybutylene succinate (PBS), polybutylene adipate tere. Poly butylene adipate-co-terephthalate (PBAT), polyhydroxybutyrate (PHB), poly-3-hydroxyvalerate (PBV), polyhydroxybutyrate valerate , PHBV), poly-3-hydroxybutyrate-co-3-hydroxyvalerate (poly-(3-hydroxybutyrate-co-3-hydroxyvalerate), poly-3-hydroxybutyrate-co-3-hydroxyhexa It may be one or more selected from the group consisting of poly-(3-hydroxybutyrate-co-3-hydroxyhexanoate). These biodegradable resins emit less environmentally harmful substances such as _{CO 2 during use or disposal, and are discarded.} It can be easily decomposed in the natural environment even in the case of a city, so it has eco-friendly characteristics.

Water-soluble resins include acrylic emulsion, methylolated urea emulsion, methylolated melanin emulsion, carboxymethyl cellulose emulsion, ethylene vinyl acetate resin emulsion, urethane emulsion, polyvinylidene chloride emulsion, latex emulsion, styrene emulsion, polyvinyl alcohol solution and polyvinyl acetate. It may be a mixture of one or more selected from the solution.

The gas barrier resin may be a polymer resin having a gas barrier ability. In one embodiment, the gas barrier resin may be an ethylene vinyl alcohol EVOH resin and/or a polyketone (PK) resin. Ethylene vinyl alcohol is a thermoplastic resin obtained by copolymerizing ethylene and vinyl alcohol. It has excellent gas barrier properties, chemical resistance, surface gloss, and high rigidity. Polyketone is a new high-molecular material composed of carbon monoxide (CO) and olefins (ethylene, propylene) from air pollution. It is eco-friendly and has excellent gas barrier properties, abrasion resistance, chemical resistance, impact resistance, and scratch resistance. Therefore, the gas barrier resin not only improves the gas barrier property, but also can exhibit effects such as antifouling and moisture proof, thereby improving the low temperature maintenance performance of the eco-friendly ice pack 100 and has eco-friendly features. In addition, since the influence of external physical factors is reduced, the quality of the surface of the outer case 110 can be improved, and thus the lifespan of the eco-friendly ice pack 100 can be extended. Furthermore, the gas barrier resin may further include a natural material. In one embodiment, the natural material may be a protein, and more specifically, may be a keratin protein or a casein protein. The keratin protein may be extracted from wool, bird feathers, reptile skin tissue, hair, and pig hoof, and the casein protein may be extracted from milk, but is not limited thereto.

If necessary, the outer case 110 may have an aluminum layer (not shown) formed on at least one selected from the pulp layer outer surface, the resin coating layer outer surface, and the pulp layer and the resin coating layer. The aluminum layer is formed of aluminum to improve the durability of the outer case 110 and prevent the filler 120 or external moisture or contaminants from penetrating the outer case 110 into the outer case 110 .

FIG. 3 is a cross-sectional view taken along line II of FIG. 1 .

Referring to FIG. 3 , the filling material 120 may be filled inside the outer case 110 . In one embodiment, the filler 120 may include the paper 121 and the phase change material 122 . In another embodiment, the filler 120 may be a phase change material 122 .

In one embodiment, the paper 121 may be formed with cellulose as a main component. In this case, the paper 121 may be any type of paper 121 as long as the main component is cellulose.

The paper 121 is a form cut to a certain size, a powder form, a form in which the paper is compressed and solidified or beaded, a sheet form in which at least a plurality of layers are stacked, and a form in which the beaded paper is provided between the plurality of sheet forms. It may be one or more selected, but is not limited thereto.

Phase change material (PCM, 122) is an energy storage material that absorbs and melts heat in an environment above the phase transition temperature and crystallizes by releasing heat to the environment below the phase transition temperature. will change the shape of In general, latent heat, which is heat that enters and exits without a temperature change when a phase transition occurs, has a significantly higher calorific value than sensible heat, which is heat that enters and exits with a temperature change without accompanying a phase transition. Therefore, the phase change material 122 can be used to store a high amount of thermal energy with the above-described characteristics or to maintain a temperature.

In one embodiment, the phase change material 122 may be water. The water changes from a liquid phase to a solid phase when the temperature is lowered from room temperature to 0°C. Accordingly, since the water absorbs ambient heat over time in a solid state and melts, it is possible to maintain the ambient temperature of the eco-friendly ice pack 100 including the water at a low temperature.

In one embodiment, the paper 121 and water may be filled in the eco-friendly ice pack 100 . At this time, the paper 121 absorbs a large amount of water.

As described above, the paper 121 is mainly composed of cellulose. Cellulose has a chemical structure in which glucose monomers are strongly linked through hydrogen bonds. Therefore, when cellulose and water meet, water molecules enter between the hydrogen bonds of cellulose to form new hydrogen bonds. This is why the paper 121, whose main component is cellulose, may contain a large amount of water.

In one embodiment, the eco-friendly ice pack 100 contains the paper 121 and water as the filling material 120 and has little deformation when freezing. The hydrogel filled in the conventional ice pack behaves in the form of one large mass, so that the volume that expands upon freezing increases. Conventional ice packs are frozen from the outer surface of the hydrogel filled in the ice pack due to the characteristic of water that freezes from the outermost surface as the density decreases as the volume expands while freezing, and the hydrogel inside the frozen outer surface becomes the volume expands and freezes. At this time, since the outer surface of the hydrogel is frozen to form a certain shape, there is a large space limitation in the volume expansion of the internal hydrogel. Therefore, the conventional ice pack may have a problem in that a specific part protrudes or a hole occurs due to the expansion pressure according to the volume expansion of the internal hydrogel when freezing.

However, the eco-friendly ice pack 100 behaves as a small unit of each of the water-absorbed paper 121 . In one embodiment, the eco-friendly ice pack 100 is frozen in small units of paper 121 during freezing, so that the expanded volume is smaller than that of a conventional ice pack. In addition, since a gap is formed between each paper 121 , space restrictions due to volume expansion during freezing may be less generated. Accordingly, the eco-friendly ice pack 100 has a small volume expanded by the filling material 120 during freezing and thus has less shape change compared to the conventional ice pack, so that the outer case 110 can be prevented from being damaged or deformed.

In another embodiment, the paper 121 may be in a form in which at least a plurality of sheets are stacked and a form in which a beaded paper is provided between the plurality of sheet forms. At this time, the beaded paper provided between the plurality of sheet forms serves as a spacer. That is, a gap is formed between a plurality of stacked sheets, so that when the eco-friendly ice pack 100 is frozen, there is less space restriction due to volume expansion. In addition, since the filling material 120 inside the eco-friendly ice pack 100 is formed by stacking a plurality of sheets or more, the load of the filling material 120 can be evenly distributed and deformation due to external physical force can be further minimized. .

Hereinafter, a method of manufacturing the eco-friendly ice pack 100 according to the first embodiment will be described.

Referring back to FIG. 2 , the outer case 110 may be formed to have a rectangular shape and to be elongated in the first direction. Since the material of the outer case 110 is the same as described above, it is omitted.

In order to form the eco-friendly ice pack 100, first, as shown in FIG. 2a, the first fold line 11a and the second fold line 11b formed in the center of the first side surface 110d and the second side surface 110e. ) to fold the outer case 110 in the inward direction. At this time, the upper portion of the outer case 110 is formed with a first bonding portion 111 in which two or more surfaces are stacked by overlapping one side of the first surface 110a and the second surface 110b. In addition, the second bonding portion 112 and the third bonding portion 113 are also in a state where two or more surfaces are laminated and overlapped.

Next, as shown in FIG. 2B , the outer case 110 is folded along a fold line (indicated by a dotted line) so that the outer case 110 forms a frame of a certain shape. At this time, the outer case 110 is formed so that the side is tapered, the vertex P may be formed. As the vertex P is formed, the outer case 110 may distribute the force when a force due to the load of the filling material 120 or a physical force occurs from the outside.

Next, a thermal bonding process is performed. Heat is applied to the first bonding portion 111 of the outer case 110 to adhere the first bonding portion 111 . In one embodiment, conventional thermal bonding may be used for the bonding, and specifically ultrasonic welding may be used. Ultrasonic welding refers to thermal bonding using energy generated by vibrating molecules with frequency and wavelength energy. Ultrasonic welding is performed quickly within a few seconds, and production efficiency can be increased because the surface of the product is not damaged, deformed, or altered.

Next, by applying heat to the second bonding portion 112 by the thermal bonding method as described above. After the above process, only the third joint portion 113 of the outer case 110 is in an open state.

Next, the filling material 120 is put into the open upper part of the outer case 110 to fill the inside of the outer case 110 . In one embodiment, the filler 120 may be paper 121 and water. In the method of filling the filling material 120 inside the outer case 110 , any method may be used as long as the paper 121 can absorb water. In one embodiment, the paper 121 and water are mixed from the outside of the outer case 110 and put into the outer case 110, or the paper 121 is solidified in the form of a stick and placed inside the outer case 110. After the input, it may be a method of filling the inside of the outer case 110 with water. Alternatively, after putting the beaded paper 121 or the beaded paper 121 provided between the plurality of or more laminated sheet forms and the plurality of sheet forms into the outer case 110, the outer case 110 inside may be a method of filling with water. In another embodiment, the inside of the outer case 110 may be filled using only water as the filler 120 .

Next, the third bonding portion 113 of the outer case 110 is bonded by the thermal bonding method as described above. Accordingly, the outer case 110 is sealed with the filling material 120 inside, and the production of the eco-friendly ice pack 100 is terminated.

The eco-friendly ice pack 100 manufactured as described above may have improved durability by using the outer case 110 formed of a pulp material. In addition, by forming the first junction 111, it is possible to firmly support the outer case 110 without inserting or mounting a separate support, so that the load of the filling material 120 filled therein or an external physical force. deformation can be minimized. Accordingly, it may be easy to use the eco-friendly ice pack 100 by stacking it.

4 is a perspective view of the eco-friendly ice pack 100 according to the second embodiment of the present invention.

Referring to FIG. 4 , the outer case 110 has a fourth bonding portion 114 on the first surface 110a and the second surface 110b formed on the upper portion of the outer case 110 of Example 1 in order to minimize shape deformation. ) and the fifth junction portion 115 may be formed to be spaced apart from each other and positioned in parallel.

Configurations other than the fourth bonding portion 114 and the fifth bonding portion 115 in the second embodiment are the same as those of the first exemplary embodiment, and thus a redundant description thereof will be omitted.

In one embodiment, the fourth junction 114 and the fifth junction 115 may have a structure in which two or more surfaces are overlapped and stacked. Therefore, the outer case 110 is firmly supported as a whole by the first junction 111, the fourth junction 114, and the fifth junction 115, and the load of the filling material 120 filled therein or an external physical force. deformation can be further minimized. In addition, since the fourth junction 114 and the fifth junction 115 are spaced apart from each other and positioned in parallel, it may be easier to stack and use the eco-friendly ice pack 100 .

In Example 2, as described above, when the filling material 120 is filled inside the outer case 110 and the inside of the outer case 110 is sealed and frozen, it can be used as the eco-friendly ice pack 100 .

5 is a view showing a method of manufacturing the eco-friendly ice pack 100 according to the second embodiment of the present invention.

The eco-friendly ice pack 100 of the second embodiment further includes a process of thermally bonding the outer case 110 by additionally folding the outer case 110 in the first embodiment to form the fourth joint 114 and the fifth joint 115 . Accordingly, the outer case 110 of the second embodiment may be formed longer in the first direction compared to the first embodiment to form the fourth junction 114 and the fifth junction 115 .

Hereinafter, the manufacturing method of Example 2 will be described, but the manufacturing method overlapping with Example 1 will be briefly described.

Referring to FIG. 5A , in order to form the eco-friendly ice pack 100 , the outer case 110 is folded inwardly at the first fold line 11a and the second fold line 11b. Next, the outer case 110 is folded outward at the third fold line 11c and the fourth fold line 11d formed on the first face 110a and the second face 110b, and again on the first face ( 110a) and at the fifth and sixth fold lines 11e and 11f formed on the second surface 110b, the outer case 110 is folded inwardly. Through the above process, the fourth junction part 114 and the fifth junction part 115 are formed in a state in which two or more surfaces are stacked on the first surface 110a and the second surface 110b of the outer case 110 . At this time, the second bonding portion 114 and the fifth bonding portion 115 are spaced apart from each other and formed to be parallel. In addition, the upper portion of the outer case 110 may be formed with a first bonding portion 111 in which two or more surfaces are stacked by overlapping one side of the first surface 110a and the second surface 110b. In addition, the second bonding portion 112 and the third bonding portion 113 are also in a state where two or more surfaces are laminated and overlapped.

Next, as shown in FIG. 5B , the outer case 110 is folded inward along a fold line (indicated by a dotted line) so that the outer case 110 forms a frame of a certain shape. At this time, the outer case 110 is formed so that the side is tapered, the vertex P is formed.

Next, the fourth bonding portion 114 and the fifth bonding portion 115 are bonded through a thermal bonding process. In one embodiment, conventional thermal bonding may be used for the bonding, and specifically ultrasonic welding may be used. Next, the first bonding portion 111 and the second bonding portion 112 are bonded by the thermal bonding method as described above.

After the above process, only the third joint portion 113 of the outer case 110 is in an open state, and the filler 120 is put into the open upper portion to fill the inside of the outer case 110 . In one embodiment, the filler 120 may be paper 121 and water. In another embodiment, the filler 120 may be water.

Next, the third bonding portion 113 of the outer case 110 is bonded by the thermal bonding method as described above. Accordingly, the outer case 110 is sealed with the filling material 120 inside, and the production of the eco-friendly ice pack 100 is terminated.

The eco-friendly ice pack 100 manufactured as described above forms the first junction part 111, the fourth junction part 114, and the fifth junction part 115 so that the outer case 110 can be viewed without inserting or mounting a separate support. Since it can be supported firmly, it is possible to further minimize deformation due to the load of the filling material 120 filled therein or an external physical force. In addition, since the fourth junction 114 and the fifth junction 115 are spaced apart from each other and positioned in parallel, the eco-friendly ice pack 100 may be more easily stacked.

The eco-friendly ice pack 100 is stored together with fresh food in a storage box such as a Styrofoam box or an ice box in a frozen state. The eco-friendly ice pack 100 absorbs surrounding heat over time and gradually melts, and by maintaining the surrounding at a low temperature due to the endothermic action of the eco-friendly ice pack 100, the deterioration of the fresh food stored together can be prevented. there will be

Experimental example

An eco-friendly ice pack 100 was manufactured according to Example 1 of the present invention. The eco-friendly ice pack 100 was sealed by putting the paper 121 and water cut into the filling material 120 inside the outer case 110 . At this time, the ratio of the input paper 121 to the water may be 3:22 by weight, but is not limited thereto.

Hereinafter, a freeze-ability test and a temperature test were performed on the eco-friendly ice pack (100, Example) prepared according to Example 1 and a known commercially available ice pack (comparative example). As for the commercially available ice pack, a superabsorbent polymer in which water has been absorbed was used in the form of a hydrogel filled therein.

6 is a graph showing the freezeability test results of Examples and Comparative Examples.

In the graph of FIG. 6, the X-axis represents the time required for the freeze-ability test, and the Y-axis represents the temperature of Examples and Comparative Examples.

Referring to FIG. 6 , a test was performed in which the Example and Comparative Example maintaining the same temperature at room temperature were frozen under the same conditions. In the freeze-ability test, the time required for the Examples and Comparative Examples to reach 0° C. from room temperature was measured. As a result, as shown in FIG. 3 , it took about 3 hours and 11 minutes to reach 0° C. from room temperature in the case of Example, and about 4 hours to reach 0° C. from room temperature in the comparative example.

As described above, in the comparative example, the frozen crystals are in the form of one large mass of hydrogel, and in the examples, the frozen crystals are in the form of each paper 121 in a small unit. That is, when freezing, water, which is a phase change material, can release energy at a faster rate in Examples compared to Comparative Examples. This is the reason why the Examples are frozen faster than the Comparative Examples.

Therefore, through the freezeability test as described above, it was confirmed that the eco-friendly ice pack 100 corresponding to the example had better freezeability than the commercial ice pack of the comparative example.

7 is a graph showing the temperature test results of Examples and Comparative Examples.

In the graph of FIG. 7 , the X-axis represents the time required for the temperature test, and the Y-axis represents the temperatures of Examples and Comparative Examples.

Referring to FIG. 7 , temperature tests of Comparative Examples and Examples were performed. Specifically, through the freezeability test of FIG. 7, the comparative example and the example, which are completely frozen and maintained at about 0°C, and the time it takes to melt and reach room temperature were measured, and the temperature test was performed in which the outside temperature was maintained at approximately 25°C. was performed in

As a result, as shown in FIG. 7, the Example and Comparative Example reached a temperature of about 2 to 3° C. and the time to maintain the temperature was similar, but the temperature of the Comparative Example rises faster than the temperature of the Example from about 5° C. showed results.

For clearer comparison, the time required to melt the Examples and Comparative Examples from 5°C to 20°C similar to room temperature was compared at intervals of 5°C. As a result, it took about 4 hours and 15 minutes for the Example and about 4 hours and 2 minutes for the Comparative Example to reach 5°C. It took about 4 hours and 43 minutes for the Example, and about 4 hours and 13 minutes for the Comparative Example, until it reached 10°C. In addition, it took about 5 hours and 17 minutes for the Example, and about 4 hours and 33 minutes for the Comparative Example, until reaching 15°C. In the case of the Example, it took about 6 hours and 5 minutes, and in the case of the Comparative Example, it took about 5 hours and 14 minutes until it reached 20°C.

As can be seen from the results, the temperature of the comparative example not only increased faster than the temperature of the example, but also the temperature of the comparative example rapidly increased from 5°C. Accordingly, the time required for the comparative example to reach 10°C is similar to the time required for the example to reach 5°C, and the time required for the comparative example to reach 20°C is the same as the time required for the example to reach 15°C It was confirmed that the comparative example melted faster than the example showing similar results.

In general, the thermal conductivity of the paper 121 is about 0.04 to 0.06 W/mk, and the thermal conductivity of water is about 0.6 W/mk, and water has a higher thermal conductivity than the paper 121 . In the case of the paper 121, the thermal conductivity is low as described above and is widely used as an insulator. Therefore, due to the characteristics of the paper 121 having low thermal conductivity, the embodiment including the paper 121 compared to the comparative example in the temperature test can be relatively less affected by the outside air. This is the reason why the Example melts slowly compared to the Comparative Example.

In the above, it was confirmed that the eco-friendly ice pack 100 corresponding to the example was superior to the commercial ice pack as a comparative example in maintaining freezeability.

As described above, the eco-friendly ice pack 100 according to the embodiments of the present invention is easy to handle because it has less shape deformation, and the frozen eco-friendly ice pack 100 is easy to use by stacking it, so that the space for storing fresh food is efficiently saved. can be used as In addition, the use of the paper 121 improves the coolness, so that fresh food can be stored for a longer time than commercially available ice packs. In addition, the filling material 120 of the eco-friendly ice pack 100 contains water and paper 121 of an eco-friendly material or water, and when the eco-friendly ice pack 100 is discarded, one end of the outer case 110 is cut and the water is discarded, or When the water is discarded, the water and the paper 121 are easily separated, so it is easy to separate and discharge.

Above, the technical idea of the present invention has been described in detail. However, those of ordinary skill in the art to which the present invention pertains will present the present invention, such as simple design change, omission of some components, and simple change of use, according to specific application of technology within the scope of the technical idea of the present invention described in the claims It is apparent that the invention may be variously modified, and such modifications are also included within the scope of the present invention.

100: eco-friendly ice pack 110: outer case
11a, 11b, 11c, 11d, 11e, 11f: fold line 110a: first side
110b: second side 110c: third side
110d, 110e, 110f, 110g: side 111, 112, 113, 114, 115: joint
120: filling material 121: paper
122: phase change material P: vertex

Claims (7)

An outer case comprising a pair of opposing surfaces, a side that is formed to be foldable along the edge of the surface to be tapered, and a vertex formed by contacting one side with two adjacent sides,
In an eco-friendly ice pack in which a sealed space is formed inside the outer case and the sealed space is filled with a filler including paper and a phase change material,
The surface includes first and second surfaces located on the upper portion, and a third surface facing the first and second surfaces,
The side surface includes first and second side surfaces facing in the first direction, and third and fourth side surfaces facing in a second direction orthogonal to the first direction,
A first joint is formed so that one side of the first surface and the second surface overlap and extend in the second direction to minimize deformation by the load and external physical force of the filler,
On the first and second surfaces, a fourth joint portion and a fifth joint portion in which two or more surfaces overlap each other by folding along the fold lines respectively formed on the first surface and the second surface are formed in parallel and spaced apart from each other by a predetermined distance;
The paper is an eco-friendly ice pack in which at least a plurality of sheets are stacked and a beaded paper is provided between the plurality of sheet forms, and the phase change material is water. delete The method according to claim 1,
The outer case includes a pulp layer made of a pulp material,
An eco-friendly ice pack comprising a resin coating layer formed under the pulp layer. The method according to claim 1,
The outer case includes a pulp layer made of a pulp material,
An eco-friendly ice pack comprising a resin coating layer formed on the upper and lower parts of the pulp layer. 5. The method of claim 3 or 4,
The resin coating layer is at least one eco-friendly ice pack selected from the group consisting of a thermoplastic resin, a copolymer resin containing a silicone-based polymer and an acrylic polymer, a biodegradable resin, a water-soluble resin, and a gas barrier resin. 6. The method of claim 5,
The gas barrier resin is an eco-friendly ice pack further comprising a natural material. delete

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