KR20230001420A - Meal kit that can maintain freshness - Google Patents

Abstract

The present invention relates to a meal kit capable of maintaining freshness. The meal kit has a freshness maintaining body coupled therein to freshly package and distribute shellfish, fish, and slices of dried fish. The freshness maintaining body includes a freshness maintaining packaging material filled with a low temperature maintaining matter and bubbles. The freshness maintaining packaging material includes a base resin, porous adsorbing powder, sodium bicarbonate, potassium permanganate solution, and organic acid. The meal kit capable of maintaining freshness maintains the freshness of fish or the like, extends the distribution storage period of food, and increases the purchase value of a product to increase the purchase needs of consumers and consequently increase price competitiveness to improve the added value of the product.

Description

Meal kit that can maintain freshness}

The present invention relates to a meal kit capable of retaining freshness in which a freshness retainer is incorporated therein in order to freshly package and distribute fish, poultry, etc.

Recently, as the packaging of fruits and vegetables, fish, and meat has changed to small packaging, consumers tend to prefer safer, higher-quality, and easier-to-purchase foods. It is becoming. In particular, consumers' interest in the safety of food is increasing, and at the same time, the preference for safe and fresh products is increasing. It is showing. Accordingly, distributors and food companies are also implementing the country of origin labeling and producer traceability system on packaging, and investing heavily in packaging technology and packaging materials that can maintain freshness for a longer period of time during distribution, storage, display, and sale of food. is in progress

Synthetic resins such as polypropylene (PP), polyethylene terephthalate (PET), polyethylene (PE), polystyrene (PS), polylactic acid (PLA), and polyvinyl chloride (PVC) are mainly used for food packaging. As a research effort on materials, some of these synthetic resin packing materials are usually improved to transmit oxygen and block moisture, thereby increasing the freshness of fruits and vegetables sold and distributed in a wrapping paper or packaging container.

In addition, fruits and vegetables consume storage materials such as starch, organic acids, and sugars through respiration and transpiration, and at this time, respiration consumes vigorously under conditions of high temperature and high ethylene concentration, and ethylene is As a natural hormone generated, it increases the respiration of fruits and vegetables and promotes overripeness. In order to reduce the amount of ethylene generated, it is necessary to lower the temperature inside the packaging container, block oxygen, or adsorb and remove generated ethylene gas. However, it is impossible to remove ethylene gas with relatively expensive oxygen-permeable synthetic resin films or containers. As the concentration of ethylene gas in the box increases, overripeness is promoted.

Unlike fruits and vegetables, fish and meat have odors derived from amine compounds such as fishy smell, which often makes them feel less fresh than they actually are. Conventional synthetic resin packaging materials reduce such odors from meat or fish. I can't do it, so I need a solution for this.

One embodiment of the present invention is to solve the problem of overripe due to gas generated during respiration of fruits and vegetables during distribution and sale of conventional fish and shellfish, fish or pox, and odors generated from fish. It is to provide a meal kit.

One embodiment of the present invention relates to a meal kit in which a freshness retainer is incorporated therein in order to package and distribute fish and shellfish, fish or pox in a fresh manner, wherein the freshness retainer has a low-temperature retainer and air bubbles enclosed therein. It includes a freshness-retaining packaging material, wherein the freshness-retaining packaging material contains a base resin, porous adsorption powder, sodium bicarbonate, potassium permanganate aqueous solution, and an organic acid.

The freshness-retaining packaging material is polyurethane (PU), polypropylene (PP), polyethylene terephthalate (PET), polyethylene (PE), polystyrene (PS), polylactic acid (PLA), polyvinyl chloride (PVC), and mixtures thereof. With respect to 100 parts by weight of one or more base resins selected from the group consisting of; 0.1 to 5 parts by weight of a porous adsorbent powder containing bamboo fine powder, mineral powder mixture, and antibacterial inorganic powder in a weight ratio of 3:1:1; 0.1 to 50 parts by weight of sodium bicarbonate; 0.01 to 0.5 parts by weight of an aqueous solution of potassium permanganate; and 0.2 to 50 parts by weight of an organic acid including citric acid, salicylic acid and sorbic acid.

The low-temperature holding material may be a mixture of 10 to 30 parts by weight of sodium chloride with respect to 100 parts by weight of the super absorbent polymer in the form of a gel obtained by absorbing water.

The meal kit with the function of maintaining freshness according to one embodiment of the present invention adsorbs and removes ethylene or other harmful gases that cause premature ripening of fish, which is generated by the respiration of fish and shellfish, and removes amines, ammonia, It has an effect of adsorbing and removing odor-causing gases such as acetic acid. In addition, it can maintain a low-temperature state for a long time, can absorb even moisture that can occur due to condensation formed due to a temperature difference, and has an effect of preventing spoilage by microorganisms by imparting an antibacterial action. As a result, it maintains the freshness of fish, shells, fish, and shells, extends the distribution and storage period of food, and increases the purchase value of the product, thereby increasing the consumer's desire to purchase and consequently increasing the price competitiveness to improve the added value of the product. It works.

In addition, the meal kit having a function of maintaining freshness according to an embodiment of the present invention encloses a freshness retainer for the meal kit together with a normal packaging container, or removes the release paper of the freshness retainer for the meal kit, so that the normal packaging container There is an effect that can be given the function of maintaining the freshness of the internal food very easily by a simple method of attaching to. In addition, since the freshness retaining function of the freshness retainer can be maintained for a long time, there is an effect that can be recycled.

1 shows a schematic image of a meal kit endowed with a function of maintaining freshness according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail. However, this is presented as an example, and the present invention is not limited thereby, and the present invention is only defined by the scope of the claims to be described later.

One embodiment of the present invention relates to a meal kit in which a freshness retainer 200 is incorporated therein in order to package and distribute fruits and vegetables, fish or meat in a fresh manner. It includes a freshness-retaining packaging material 220 in which a retainer and air bubbles 210 are enclosed, and the freshness-retaining packaging material 220 includes a base resin, porous adsorbent powder, sodium bicarbonate, potassium permanganate aqueous solution, and an organic acid. A meal kit 100 endowed with a function of maintaining freshness is provided.

The meal kit 100 with a freshness maintaining function according to an embodiment of the present invention may enclose a freshness retainer for a meal kit together with a conventional packaging container 101, or may include an adhesive layer 300 on the freshness retainer for a meal kit. ) and the release paper 400, and then removing the release paper and attaching it to a conventional packaging container 101, there is an effect that can very easily impart the function of maintaining the freshness of the internal food. At this time, the conventional packaging container 101 for the meal kit may include a receiving groove capable of accommodating the freshness retainer. Schematic images of the meal kit according to one embodiment of the present invention to which the freshness retainer is combined by a simple method of attaching the freshness retainer for the meal kit to a conventional packaging container 101 are as shown in FIGS. 1 to 3 .

The meal kit with the function of maintaining freshness according to an embodiment of the present invention adsorbs and removes ethylene and other harmful gases that cause overmaturation of fish due to respiration of fish, and removes amines, ammonia, acetic acid, etc. It has the effect of adsorbing and removing the same odor-causing gas. In addition, it can maintain a low-temperature state for a long time, can absorb even moisture that can occur due to condensation formed due to a temperature difference, and has an effect of preventing spoilage by microorganisms by imparting an antibacterial action.

In order to further improve this effect, the freshness-keeping packaging material 220 is based on 100 parts by weight of the base resin; 0.1 to 5 parts by weight of porous adsorbent powder; 0.1 to 50 parts by weight of sodium bicarbonate; 0.01 to 0.5 parts by weight of an aqueous solution of potassium permanganate; And it may be an unfoamed layer 221 containing 0.2 to 50 parts by weight of an organic acid. In addition, the freshness-retaining packaging material may include a foam layer 222 obtained by mixing the above components and content ratios and then foaming the mixture at a temperature of 180 to 220 °C. This freshness-retaining packaging material may be manufactured to have a single-layer or multi-layer structure within the range of the above-described components and content ratios. In addition, some of the freshness-keeping packaging material may be manufactured as a single layer, and some may be manufactured to have a multi-layer structure. In addition, when the freshness-retaining packaging material has a multilayer structure, each layer may be laminated by an adhesive layer or may be laminated by thermal fusion.

More specifically, when the freshness-preserving packaging material uses a layer close to the portion where the low-temperature material and air bubbles 210 are sealed as an inner layer, the inner layer is an unfoamed layer 221; The outer layer may be made to include a foam layer 222 . More preferably, the inner layer has a foaming rate of 0 to 49%, and the outer layer has a foaming rate of 50 to 100%, thereby reducing the moisture generation rate itself due to condensation due to the temperature difference, , the specific surface area of the outer layer is increased, so that the effect of gas adsorption, moisture adsorption, and functional components having antibacterial action can be dramatically improved. In addition, by enabling a stronger bond between the base resin and other functional components, there is an effect of sustaining the effect of the functional components for a longer period of time.

More specifically, the inner layer is based on 100 parts by weight of the base resin; 0.1 to 5 parts by weight of porous adsorbent powder; 0.1 to 20 parts by weight of sodium bicarbonate; 0.01 to 0.5 parts by weight of an aqueous solution of potassium permanganate; and 0.2 to 50 parts by weight of an organic acid, and the outer layer is based on 100 parts by weight of a base resin; 0.1 to 5 parts by weight of porous adsorbent powder; 20 to 50 parts by weight of sodium bicarbonate; 0.01 to 0.5 parts by weight of an aqueous solution of potassium permanganate; and 0.2 to 50 parts by weight of an organic acid, and then applying heat only in the direction of the outer layer, so that the inner layer has a foaming rate of 0 to 49% and the outer layer has a foaming rate of 50 to 100%. A gradient of the rate can be given.

Schematic and cross-sectional views of the freshness retainer coupled to the inside of the meal kit having the freshness retaining function according to one embodiment of the present invention are shown in FIGS. 4 to 6 .

More specifically, the base resin has a packaging material generally used in the art, and the type is not particularly limited, but, for example, polyurethane (PU), polypropylene (PP), polyethylene terephthalate (PET) ), polyethylene (PE), polystyrene (PS), polylactic acid (PLA), polyvinyl chloride (PVC), and at least one selected from the group consisting of mixtures thereof may be used. especially in polyurethane (PU); One or more selected from the group consisting of polypropylene (PP), polyethylene terephthalate (PET), polyethylene (PE), polystyrene (PS), polylactic acid (PLA), polyvinyl chloride (PVC), and mixtures thereof : By using a mixture in a weight ratio of 1 to 9, processability is further improved, miscibility with the other components is further improved, and durability of the freshness-retaining packaging material can be strengthened. In particular, when the freshness-retaining packaging material is manufactured to have a multi-layered structure or a gradient in expansion rate, the above effect can be further improved by using polyurethane (PU) mixed in the above-described content range.

The porous adsorption powder is a material added to adsorb and remove harmful gases and to impart antibacterial activity, and includes bamboo fine powder, mineral mixture powder, and antibacterial inorganic powder in a weight ratio of 3: 1: 1 , It is possible to dramatically improve the function of maintaining the freshness of contents even with a small amount, and to provide an eco-friendly freshness-keeping packaging material at a relatively low price. The average particle size of the porous adsorption powder is generally used in the art and is not particularly limited, but is preferably in the range of 0.1 to 1000 nm in consideration of processability, gas adsorption capacity, and antimicrobial activity of freshness-retaining packaging materials.

The bamboo fine powder has a structure in which vascular bundles of bamboo that only grow in length have a straight porosity structure, and thus has an adsorption effect 10 times greater than that of wood that grows in volume. As a result, it is possible to effectively adsorb the corruption gas initially generated. In addition, since it has excellent miscibility with polyurethane (PU) base resin, it serves to further improve the bonding force between the base resin and other porous adsorbent powders, thereby enhancing the durability of the freshness-retaining packaging material.

In addition, the mineral mixture powder is generally used in the field and the type is not particularly limited, but, for example, kaolin, diatomaceous earth, elvan, montmorillonite, millerite, muscovite, boric acid, quartz, nephrite, meteorite, It is preferable to use at least one selected from the group consisting of feldspar, vermiculite, capellenite, pentlandite, anatomical stone, talc, and mixtures thereof. These mineral powder mixtures are naturally derived substances that are safe for the human body and living organisms, and do not deteriorate even when stored for a long time at room temperature, so that their functionality can be maintained continuously. More specifically, the mineral mixture powder greatly extends the freshness retention period by removing (decomposing) ethylene (C2H4) gas, which causes drip and sponge phenomena, such as food. In addition, the mineral mixture powder emits strong far-infrared rays. Through the emission of these beneficial vibration waves (eg, 6 to 12 μm), harmful microorganisms and viruses are killed, while beneficial bacteria such as fermentative bacteria are selectively given growth promotion and activity. It has a bactericidal (antibacterial) action. In addition, the mineral mixture powder exhibits an excellent deodorizing function by cutting the C-H chain of formaldehyde (HCHO), toluene, xylene, VOCs, and odorous components.

The antimicrobial inorganic powder is generally used in the field and the type is not particularly limited, but examples include metal nanoparticles such as silver, zinc, brass, and bronze (average particle size is 2 to 30 nm), silica It is preferable to use at least one selected from the group consisting of , alumina, and mixtures thereof. Such antibacterial inorganic powder is used in a relatively small amount together with the above-described bamboo fine powder and mineral mixture powder, and has an effect of dramatically improving the function of maintaining the freshness of the contents.

The sodium bicarbonate has an effect of maximizing the deodorizing effect and further improving the antibacterial effect by generating carbonic acid gas that competitively inhibits the action of ethylene through a reaction with an organic acid.

The aqueous solution of potassium permanganate has the effect of greatly improving not only the effect of removing ethylene and inhibiting the occurrence of plant pathogenic fungi, but also the effect of adsorbing and removing odor-causing gases such as amine, ammonia, and acetic acid generated from fish. More specifically, the potassium permanganate aqueous solution is obtained by dissolving 1 to 5% by weight of one or more water-soluble permanganate salts selected from the group consisting of NaMnO4, KMnO4, NH4MnO4, Mg(MnO4)2, and mixtures thereof in water. The above effect can be further improved.

The organic acid is a component that maximizes the deodorizing effect through reaction with the aqueous solution of sodium bicarbonate and potassium permanganate, and organic acids such as citric acid, salicylic acid and sorbic acid may be preferably used. More specifically, the deodorizing effect can be further improved by including mixing citric acid, salicylic acid and sorbic acid in a weight ratio of 1: 2: 2.

Since the meal kit having a freshness-preserving function according to an embodiment of the present invention includes a freshness-preserving packaging material in which a low-temperature substance and air bubbles are sealed therein, by maintaining the temperature inside the meal kit at a low temperature for a long time, the freshness-preserving function can be granted. In addition, there is an effect of being configured to sufficiently withstand the internal pressure or the external pressure according to the volume change due to the phase change by encapsulating the air bubbles together.

The low-temperature holding material may be used by mixing 10 to 30 parts by weight of sodium chloride with respect to 100 parts by weight of the gel-like superabsorbent polymer obtained by absorbing water in the superabsorbent polymer.

Super Absorbent Polymer (SAP) is a polymer material that can absorb and retain water hundreds to thousands of times its own weight. When water is added, it swells to form a hydrogel. This hydrated gel has the characteristic of not easily discharging water even when pressure is applied from the outside. Starch-based, synthetic resin-based, cellulose-based resins, etc. may be used as the superabsorbent polymer, but it is not particularly limited, but poly sodium acrylate (PSA) may be generally used. And since the amount of water is determined according to the absorption capacity of the superabsorbent polymer, the content is not limited.

Next, 10 to 30 parts by weight of sodium chloride is added to the gel-like superabsorbent polymer. When sodium chloride is added to the gel-like superabsorbent polymer, a certain amount of water absorbed in the superabsorbent polymer is released by osmotic pressure to dissolve the sodium chloride. That is, when sodium chloride is added to the gel-like super absorbent polymer, a certain amount of water is present in the super absorbent polymer due to the absorption capacity of the super absorbent polymer to maintain coolness, escapes from the super absorbent polymer, dissolves sodium chloride, and is thus formed. The sodium chloride aqueous solution lowers the freezing point and can maintain the temperature inside the meal kit at a low temperature for a long time.

The meal kit with the function of maintaining freshness according to an embodiment of the present invention adsorbs and removes ethylene and other harmful gases that cause overmaturation of fish, which are generated by the respiration of fruits and vegetables, and removes amines, ammonia, acetic acid, etc. It has the effect of adsorbing and removing the same odor-causing gas. In addition, it can maintain a low-temperature state for a long time, can absorb even moisture that can occur due to condensation formed due to a temperature difference, and has an effect of preventing spoilage by microorganisms by imparting an antibacterial action. This maintains the freshness of fish, etc., extends the distribution storage period of food, and at the same time increases the purchase value of the product, thereby increasing the consumer's purchase desire and consequently increasing the price competitiveness, thereby improving the added value of the product.

In addition, the meal kit having a function of maintaining freshness according to an embodiment of the present invention encloses a freshness retainer for the meal kit together with a normal packaging container, or removes the release paper of the freshness retainer for the meal kit, so that the normal packaging container There is an effect that can be given the function of maintaining the freshness of the internal food very easily by a simple method of attaching to. In addition, since the freshness retaining function of the freshness retainer can be maintained for a long time, there is an effect that can be recycled.

Hereinafter, the configuration and operational effects of the present invention will be described in more detail through examples. However, it is obvious to those skilled in the art that the present invention is not limited only to these examples.

<Production Example>

After separately extruding the inner layer and the outer layer as a freshness-keeping packaging material, they were thermally fused and laminated. At this time, the inner layer is based on 100 parts by weight of a base resin mixed with polyurethane (PU) and polyethylene (PE) in a weight ratio of 1: 9; 1.2 parts by weight of a porous adsorption powder obtained by mixing bamboo fine powder, mineral powder mixture (kaolin and boric acid stone in a weight ratio of 1:1), and antibacterial inorganic powder (silver) in a weight ratio of 3:1:1; 5 parts by weight of sodium bicarbonate; 0.3 parts by weight of an aqueous solution of potassium permanganate; and 7 parts by weight of an organic acid obtained by mixing citric acid, salicylic acid, and sorbic acid in a weight ratio of 1:2:2.

In addition, the outer layer is based on 100 parts by weight of a base resin mixed with polyurethane (PU) and polyethylene (PE) in a weight ratio of 1: 1; 1.2 parts by weight of a porous adsorption powder obtained by mixing bamboo fine powder, mineral powder mixture (kaolin and boric acid stone in a weight ratio of 1:1), and antibacterial inorganic powder (silver) in a weight ratio of 3:1:1; 45 parts by weight of sodium bicarbonate; 0.3 parts by weight of an aqueous solution of potassium permanganate; and 7 parts by weight of an organic acid obtained by mixing citric acid, salicylic acid, and sorbic acid in a weight ratio of 1:2:2.

With respect to the laminated molding, by applying heat at a temperature of about 220 ° C. only in the direction of the outer layer, the outer layer has a high foaming rate and the inner layer has a low foaming rate, giving a gradient of foaming rate to prepare a freshness-keeping packaging material, , As shown in FIG. 6, it was molded to enclose the low-temperature holding material and air bubbles.

On the other hand, after adding 1000 ml of water to 9 g of poly sodium acrylate (PSA), which is a super absorbent polymer, to obtain a gel-like super-absorbent polymer, 30 parts by weight of sodium chloride is mixed with 100 parts by weight of the gel-like super absorbent polymer, A retainer was prepared.

A freshness retainer was prepared by introducing 95 vol% of the prepared low-temperature material and 5 vol% of air bubbles into the prepared freshness-retaining packaging material and sealing the same.

<Example>

After freezing the freshness retainer prepared in the above Preparation Example, a meal kit having a freshness retaining function was manufactured by attaching it to a conventional packaging container as shown in FIG. 1 .

<Comparative example>

A freshness-retaining packaging material, based on 100 parts by weight of a polyethylene (PE) base resin; 1.2 parts by weight of a porous adsorbent powder obtained by mixing a mineral mixture powder (kaolin and boric acid stone in a weight ratio of 1:1) and an antibacterial inorganic powder (silver) in a weight ratio of 1:1; 5 parts by weight of sodium bicarbonate; and 7 parts by weight of citric acid, except that it was prepared as a single layer of an unfoamed layer. Thereafter, a meal kit was prepared in the same manner as in the above example.

<Experimental Example 1>

A comparative test of the gas adsorption performance of the meal kits prepared in the above Examples and Comparative Examples was performed. Ethylene adsorption amount (performed in accordance with KS M1998:2009) and ammonia adsorption amount (performed in accordance with KS M 1998:2009) were compared and measured, and the results are shown in Table 1.

From the results of Table 1, it was confirmed that the meal kit according to the embodiment of the present invention had superior ethylene and ammonia gas adsorption capacity compared to the comparative example. This means that it effectively adsorbs ethylene gas, harmful gas, and ammonia, which are components that cause fishy smell and odor, such as amines and amines, which are consequently generated from fish. Therefore, it was confirmed that the freshness of the fish can be maintained for a longer time and the added value can be increased by improving the reliability of the product.

Although preferred embodiments of the present invention have been described above, the present invention can use various changes, modifications, and equivalents. It is clear that the present invention can be equally applied by appropriately modifying the above embodiment. Therefore, the above description does not limit the scope of the present invention, which is defined by the limits of the following claims.

101: ordinary packaging container
100: Meal kit with freshness retention function
200: freshness retainer
210: cold retainer and bubble 220: freshness retaining packaging material
221: unfoamed layer 222: foam layer
300: adhesive layer 400: release paper

Claims (1)

It relates to a meal kit in which a freshness retainer is incorporated in order to freshly package and distribute fish, shellfish, or shellfish.
The freshness retainer includes a freshness retaining packaging material in which a low temperature retaining material and air bubbles are enclosed,
The freshness-retaining packaging material includes a base resin, porous adsorption powder, sodium bicarbonate, potassium permanganate aqueous solution, and an organic acid,
The freshness-retaining packaging material
Selected from the group consisting of polyurethane (PU), polypropylene (PP), polyethylene terephthalate (PET), polyethylene (PE), polystyrene (PS), polylactic acid (PLA), polyvinyl chloride (PVC), and mixtures thereof With respect to 100 parts by weight of one or more base resins to be;
0.1 to 5 parts by weight of a porous adsorbent powder containing bamboo fine powder, mineral powder mixture, and antibacterial inorganic powder in a weight ratio of 3:1:1;
0.1 to 50 parts by weight of sodium bicarbonate;
0.01 to 0.5 parts by weight of an aqueous solution of potassium permanganate; and
A milk kit capable of maintaining freshness, characterized in that it contains 0.2 to 50 parts by weight of an organic acid including citric acid, salicylic acid and sorbic acid.

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