KR102504370B1 - A manufacturing method for food storage container maintaining freshness - Google Patents

Abstract

The present invention is a packaging container provided with multifunctional corrugated cardboard and related technology for its manufacturing method. It is a technology related to packaging containers provided to have.
The packaging container provided by the present technology includes the first step of obtaining a waterproof functional liquid that simultaneously imparts waterproofness and strength reinforcing performance to the packaging container, and the third step of obtaining ceramic powder (2) for imparting far-infrared rays and anion radiation to the packaging container. Including the step process, the waterproof functional solution obtained in the first step, the far-infrared ray and negative ion function ceramic powder (1) obtained in the second step, and the ceramic powder (2) obtained in the third step, as well as Chunggit to impart continuous antibacterial performance To obtain a mixed coating solution and apply or coat the mixed coating solution to a base paper selected from the surface paper 10, the back paper 20, and the corrugated paper 30 forming the corrugated board to secure waterproofness, far-infrared ray radiation function, deodorization performance, and antibacterial function It is characterized by a manufacturing method of a functional packaging container applied to obtain a packaging container.

Description

Packaging container provided with corrugated cardboard having a freshness maintaining function and manufacturing method thereof {A manufacturing method for food storage container maintaining freshness}

The present invention is a packaging container provided with multifunctional corrugated cardboard and related technology for its manufacturing method. It is a packaging container provided to have and technology related to its manufacturing method.

In general, corrugated cardboard is formed by attaching cardboard to both sides of a corrugated medium formed in a corrugated shape with an adhesive to increase the buffering degree, and is widely used to manufacture boxes for packing goods.

However, the above-mentioned packaging box has a simple function of preventing the goods stored in the box from being damaged by the cushioning properties of the corrugated cardboard, and maintains the freshness of various goods such as agricultural products, livestock products, fishery products, and forest products stored in the box for a long period of time. It was difficult to expect the role of neutralizing and removing irritating odors generated from products.

However, modern people who enjoy well-being are encouraged to grow eco-friendly agricultural products and want fresh ingredients. Harvested agricultural products are likely to have pesticide residues, and food materials containing these residual pesticides eventually have adverse effects such as changing hormones in the human body.

Therefore, even if the toxicity of pesticide residues remains in the packaging boxes of fruits or agricultural and marine products, a product packaging box in which the toxicity is naturally neutralized and removed during transportation and movement has been required. A technique for manufacturing a functional box by adding mineral powder having various adsorption functions, such as ceramic powder, charcoal, zeolite, aluminum oxide, and ocher, has been partially proposed and attempted.

In general, it is already known that the storage of food is to inhibit the action of microorganisms and enzymes that cause deterioration and spoilage.

In addition, various means such as refrigeration, freezing, room temperature storage, gas storage, and salting have been suggested as countermeasures to prevent deterioration and spoilage of food, but the most commonly used is the refrigeration method using a refrigerator at home. However, the above refrigeration method does not completely inhibit the growth of microorganisms, the respiration of raw vegetables or fruits and vegetables, and the attack of various enzymes, so when stored for a long time, food spoilage due to the proliferation of microorganisms, odor of food due to enzymes and respiration and cause deterioration.

Therefore, studies have been actively conducted to increase the storage period while removing the main cause of the decline in the quality grade of food in the refrigerator. A technology in which a large amount of mineral powder is mixed with starch paste and applied to the surface of corrugated cardboard has been partially tried, but the adhesive component of the starch paste adheres only to the surface of corrugated cardboard and the moisture in the air on the surface of corrugated cardboard has been partially tried. When included, there has been a problem that the surface paper and the inlay are separated and easily damaged, and the functionality is also damaged and the strength is lowered.

In addition, even if the packaging box is endowed with functionality, if the strength or adhesiveness is reduced, the functionality of the packaging box is lost and the product stored in the box is deteriorated or damaged. There have been unresolved problems.

As a manufacturing method related technology of an embodiment of obtaining corrugated cardboard, Registration Patent No. 10-1095226 discloses a first step of attaching a paper cardboard fabric roll to a corrugator as a method for manufacturing corrugated cardboard to prevent tearing of corrugated cardboard, and the first step After passing through the second process of feeding the paper cardboard fabric between the upper and lower pressure feed rolls, and through the second process, the paper cardboard passes through the upper and lower pressure feed rolls and between a pair of pressure forming rolls to form a constant wavy shape. The third process in which the corrugated medium is made so that the corrugated material is continuously formed, and the tear-resistant tape attached to the corrugator in the corrugated medium in which the corrugated medium goes through the upper and lower compression rolls through the third process, and the upper and lower outer corrugators, respectively The fourth process in which the upper and lower limbs, which are mounted liner paper, are fed between the upper and lower press rolls, and in the process of passing through the upper and lower press rolls through the fourth process, the tear-resistant tape and the adhesive surface of the upper and lower presses Each adhesive surface is divided into a fifth process in which it is bonded to the surface layer of the corrugated medium on which the bone is formed, and the technology applied to obtain the corrugated board is presented in detail.

However, there has been a problem in that the corrugated cardboard packaging box provided by the prior art provides waterproofness, far-infrared radiation, deodorization, and antibacterial properties, so that antibacterial and sterilizing effects against various bacterial propagation cannot be expected for food materials or fruits.

An object of the present invention is to mix a composition for imparting a waterproof function to a packaging container with a ceramic powder (1) having a far-infrared ray and anion emitting function, and to mix a ceramic powder (2) for imparting a deodorizing function to a packaging container. In order to impart continuous antibacterial performance to the container, a mixed coating solution with added shungite is obtained, and the mixed coating solution is applied or coated on a base paper selected from surface paper, back paper, and corrugated paper forming corrugated cardboard, and then cured to provide waterproofness and far-infrared radiation function , deodorizing ability, and has the purpose of providing a packaging container that secures antibacterial properties.

In order to achieve the above object, the technical configuration of the invention newly proposed herein is a method for manufacturing a packaging container provided to have a freshness maintaining function by coating a functional material that provides waterproofness, far-infrared radiation, deodorization, and antibacterial properties on a corrugated base paper can be achieved by

That is, the technical composition newly disclosed herein is 58 to 62% by weight of acrylic emulsion, 8 to 12% by weight of EVA (Vinyl acetate ethylene), polysol ( Polysol) 6 to 10% by weight and water 20 to 24% by weight to obtain a waterproof function liquid that gives waterproof and strength reinforcement performance, and to give far infrared rays and anion radiation to packaging containers Second step process for obtaining far-infrared and negative ion emitting ceramic powder (1) containing 40 to 50% by weight of elvan powder, 20 to 30% by weight of ocher powder, 20 to 30% by weight of pozzolan, and 5 to 10% by weight of tourmaline powder 90 to 95% by weight of pulverized minerals, 5 to 10% by weight of molten salt powder, in which amphibole, a silicate mineral, and serpentine, a hydrous magnesium silicate mineral, are mixed in a ratio of 5 ± 1: 5 ± 1 to impart deodorization to the packaging container. The third step of obtaining ceramic powder (2) containing 20 to 30% by weight of the far-infrared and anion-emitting ceramic powder (1) obtained in the second step to 50 to 60% by weight of the waterproof solution obtained in the first step, 10 to 20% by weight of ceramic powder (2), which is the deodorizing mineral obtained in the step, and 1 to 5% by weight of shungite to give continuous antibacterial performance Through the fourth step process and the fourth step of obtaining a mixed coating solution After the obtained mixed coating liquid is applied or coated on a base paper selected from surface paper, back paper, and corrugated paper forming corrugated cardboard, it is cured in a maturation room maintaining a range of 120 to 130 ° C. It is an invention completed by confirming that the object of the present application can be achieved through a packaging container obtained through a technical configuration applied to obtain corrugated cardboard.

In the manufacturing process of the waterproofing liquid for packaging containers of the present application, acrylic emulsion is a water-soluble resin having both hydrophilic and lipophilic groups and is used to provide strength and bonding strength to the adhesive composition, and EVA (Ethylene vinyl acetate) is a mixture of ethylene and vinyl acetate. It is a polymer obtained by copolymerizing monomers. As the content of vinyl acetate increases, the density increases, but on the other hand, the crystallinity decreases to provide flexibility. was used for

When the acrylic emulsion is included in less than 58% by weight, waterproofness and water repellency are deteriorated due to a decrease in adhesion to the packaging container, and when it is included in more than 62% by weight, durability is reduced due to an increase in permeability. If EVA (Vinyl Acetate Ethylene) is included in less than 8% by weight, the permeability to the packaging container may increase and the shape may be changed, and if it is included in more than 12% by weight, the permeability to the packaging container may decrease and the adhesive strength may be lowered. It is considered that when less than 6% by weight of polysol is included, the durability and waterproofness of the packaging container is reduced, and when it is included in more than 10% by weight, the penetration into the packaging container may be reduced due to an increase in viscosity. The process water used in the step application can be ordinary tap water or purified water, but the stem and root bark of the mulberry tree contain phenols and flavonoids, which have strong antioxidant properties, so they have a property that prevents them from being easily oxidized and decayed. When the mulberry stem and root bark are boiled in purified water to be used, and a solution concentrated to about 1/2 volume is used as process water, it can be applied to increase the durability of corrugated board.

In addition, in the second step of the packaging container manufacturing process of the present application, the elvan powder used when obtaining the far-infrared ray and negative ion emitting ceramic powder (1) can be applied to be replaced with sandalwood powder, and the third packaging container manufacturing process of the present application In the ceramic powder (2 ₎ used in the step, amphibole and serpentine are mixed in a weight ratio of 60:40, calcined in the range of 800 ° C, and then the ceramic powder is pulverized. wt%, Fe ₂ O ₃ 7-10 wt%, Al ₂ O ₃ 1-3 wt%, CaO 3-4 wt%, Na ₂ O 1-2 wt%, TiO ₂ 1-2 wt%, K ₂ O It is analyzed as 0.1 to 0.2% by weight, and it can be confirmed that it exhibits high deodorizing ability.

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The finished packaging box obtained through the manufacturing process of the present application is a mixture of natural minerals that emit negative ions in nature, so it can not only adsorb and neutralize the toxicity of pesticides remaining in agricultural and marine products by the adsorption effect of fine particles of minerals, but in particular By adsorbing and removing irritating odors emitted from marine products, it is possible to prevent unnecessary odors from occurring when transporting boxes, and at the same time, the strong anion substitution ability of clay minerals removes hydroxyl group (OH-) ions that cause oxidation reactions in agricultural and marine products. Since it can be strongly reduced, even if stored for a long time, corruption is prevented and high freshness can be maintained.

Figure 1: Manufacturing process diagram for obtaining the functional packaging container of the present application
Figure 2: An application example of obtaining a packaging container by applying the present technology

Hereinafter, a step-by-step process will be described in detail according to a manufacturing process diagram for obtaining a functional packaging container of FIG. 1 attached to a preferred embodiment for achieving the above object.

As raw materials used in the present technology, minerals such as elvan, white sand, amphibole, serpentine, tourmaline, pozzolan, and shungite, which exist as natural minerals in nature, are collected from the production area, and the collected minerals are put into a crusher, After crushing into particles having a size of 5 mm, the particles are sorted to remove impurities, and the minerals are put into a drying furnace, and then heated at about 450 ± 50 ° C to remove impurities and a drying process is performed at the same time Each functional raw material can be prepared and used as a means of putting the dried minerals into a grinder, finely pulverizing them, sifting them through a sieve having a particle size of 500 mesh or more, processing them into fine powders, and storing them in different containers.

Looking at the manufacturing embodiment of the mixed coating solution for obtaining the functional packaging container to be provided herein, the process for obtaining the primary waterproof functional solution used as a means for imparting waterproofness and water repellency to the functional packaging container is an acrylic emulsion (Acrylic emulsion) 58-62% by weight, EVA (Vinyl acetate ethylene) 8-12% by weight, polysol (Polysol) 6-10% by weight, process water (Water) 20-24% by weight to obtain a waterproof functional liquid 40 to 50% by weight of elvan or white clay, 20 to 30% by weight of ocher powder, 20 to 30% by weight of pozzolan, tourmaline powder The second step process in which 5 to 10% by weight is mixed, and the pulverized mineral material in which amphibole, a silicate mineral, and serpentine, a hydrous magnesium silicate mineral, are mixed in a ratio of 5±1: 5±1 to impart a deodorizing function to the packaging container 90 to 95% by weight and 5 to 10% by weight of molten salt powder in the third step of obtaining the ceramic powder (2), and 50 to 60% by weight of the waterproof functional solution obtained in the first step and far-infrared rays obtained in the second step and 20 to 30% by weight of anionic functional ceramic powder (1), 10 to 20% by weight of ceramic powder (2) obtained in the third step, and 1 to 5% by weight of shungite to give continuous antibacterial performance to 100% by weight It can be described by dividing into the fourth step process of obtaining the mixed coating solution constituting, and the mixed coating solution obtained through the fourth step is selected from the surface paper 11, the back paper 12, and the corrugated medium 13 forming the corrugated board It is an invention completed by confirming that it is possible to obtain a packaging container that secures waterproofness, far-infrared radiation, deodorization, and antibacterial properties by applying or coating on base paper and then curing in a maturation room maintaining a temperature of 120 to 130 ° C.

Hereinafter, it will be described in the form of manufacturing examples for each step.

Preparation of waterproof functional fluid (1) Example

Acrylic emulsion 60g

EVA (Vinyl Acetate Ethylene) 10g

Polysol 8g

Water 22g

A subtotal 100g waterproof functional fluid can be obtained.

Preparation of ceramic powder (1) raw material (2) Example

Elvan 45g

25 g processed ocher powder

pojoran 25

Tourmaline powder 5g

Subtotal 100 g ceramic powder (1) was obtained

Among the raw materials, the processed loess powder is obtained by collecting high-quality loess in the southern coastal area, drying it naturally, removing foreign substances from the firstly dried loess through a 40 to 50 mesh sieve, and secondly sifting the dried loess through a 90 to 100 mesh sieve. After sieving, it was calcined at a temperature between 700 and 800° C., and as a result, one obtained in a size of 500 to 600 mesh was used.

Preparation of ceramic powder (2) raw material (3) Example

amphibole 50g

Serpentine 45g

5g molten salt

Subtotal 100g ceramic powder (2) can be obtained

Preparation of mixed coating solution (4) Example

60g of the above waterproof function liquid

Ceramic powder (1) 20g

Ceramic Powder (2) 15g

shungite powder 5g

total 100g

The description of the process of coating the packaging container provided in the form of corrugated cardboard using the above mixed coating solution will be described with reference to FIG. 30) is attached, and this configuration can be applied in the same way as the configuration of general corrugated cardboard, but in the present application, the manufacturing (4) ) It is a technique to obtain a packaging container that is impregnated with the mixed coating solution obtained in Example to provide waterproofness, far-infrared radiation, deodorization and antibacterial properties.

Figure 2 is to cut the corrugated cardboard to assemble into a box, and immerse the cut corrugated cardboard in the mixed coating solution obtained in Example 4 of manufacturing (4) to give various functions to the corrugated cardboard. In some cases, corrugated cardboard is assembled into a box shape. And, it will be possible to immerse the assembled box in the mixed coating solution, but considering the impregnation efficiency or productivity of functional components, it is preferable to immerse the corrugated cardboard in the waterproof composition before assembling the box.

When the mixed coating liquid is impregnated into corrugated cardboard, the mixed coating liquid is coated on the surface paper 10, the back paper 20 and the core 30 of the corrugated cardboard to form a functional component coating layer 40 as shown in FIG. Since the inside of the corrugated cardboard is coated along with the inner and outer surfaces, even if moisture enters the inside of the corrugated cardboard through the end surface of the corrugated cardboard, the corrugated cardboard is not damaged, so there is no fear of damaging the box by moisture.

In addition, the strength of the corrugated cardboard is reinforced by the functional component coating layer 40, and the durability of the packaging box 100 is improved. The viscosity of the mixed coating solution obtained in Example 4 is adjusted and provided as a packaging box. After immersing the cut corrugated cardboard in the mixed coating solution for about 20 to 30 minutes, it was dried for 5 minutes with an infrared dryer to assemble the box. In addition, physical properties such as water resistance and adhesiveness of the assembled box were tested.

water resistance test

Water droplets were dropped on the surface of the packaging box, the contact angle between the water droplets and the box surface was measured with a contact angle meter, and the waterproofness was tested by putting the box in a water tank and visually checking for abnormalities in the box. The results are shown in Tables 1 and 2. Same as

division 1 time Episode 2 3rd time 4 times Contact angle (°) 115 114 113 113

immersion time 6 hours later after 12 hours 24 hours later 48 hours later State of visual observation ( clear clear clear clear

A large contact angle means high waterproofness. As can be seen in Table 1, it can be seen that the average contact angle has excellent waterproofness with an average contact angle of 113˚ or more. Also, as a result of immersing the manufactured box in water, the box It was not damaged, and through this, it was confirmed that the box according to the present invention has high waterproofness.

The inventor of the present application prepares a sample for the experiment by cutting the upper surface paper 10 into a size of 100 × 100 mm in width * length as a part of corrugated cardboard to which the present technology is applied, and the test method of KFIA-FI-1005 to confirm the far-infrared emissivity. As a result of measuring the BLACK BODY comparison using a spectrometer at a temperature of 37 ° C, the far-infrared emission performance of the surface paper 10 sample having the functionality of the present invention was measured, and the results are shown in Table 3.

Emissivity (5~20㎛) , 37 radiation energy (W,㎡,㎛.37℃) 0.902 3.51×10 ²

The inventor of the present application prepares a sample for the experiment by cutting the upper surface paper (10) into a size of 100 × 100 mm in width * length as a part of corrugated cardboard and the test method of KFIA-FI-1004 to test deodorization performance. Based on this, the concentration and deodorization rate of ammonia gas measured at 30-minute intervals using a gas detection tube are measured and shown in Table 4, and the blank (measured without a sample) is substantially similar to the initial concentration, but the present invention It can be confirmed that the sample having the functional layer (1a) of the first 30 minutes deodorization rate is 64% (Blank is 6%), and the deodorization rate after 120 minutes is 70% (Blank is 12%) and has an excellent deodorization effect. could

Test Items Elapsed time (minutes) Blank concentration (ppm) Sample concentration (ppm) Deodorization rate (%)

deodorization test Early 500 500 - 30 470 173 64 60 460 160 66 90 450 143 68 120 440 132 70

The inventor of the present application prepares a sample for the experiment by cutting the upper surface paper (10) into a size of 100 × 100 mm in width * length as a part of corrugated cardboard to which the present technology is applied, and the test method of KFIA-FI-1003 to conduct an antibacterial effect test. Table 5 shows the antimicrobial test results by Escherichia coli ATCC 25922 and Staphylococcus aureus ATCC 6538 obtained by Escherichia coli ATCC 25922 and Staphylococcus aureus ATCC 6538. Although both Escherichia coli and Staphylococcus aureus increased after a lapse of time, the sample with the functional layer (1a) of the present invention showed a reduction rate of 98.9% for E. coli and 99.4% for Staphylococcus, indicating that it had an excellent antibacterial effect. there was. Here, CFU, which is a concentration unit, is Colony Forming Unit.

Test Items Sample classification initial concentration
(CFU/ml) Concentration after 24 hours
(CFU/ml) thrift rate
(%) caused by Escherichia coli
antibacterial test Blank
2.5×10 ⁵ 5.8×10 ⁶ - Original 1a sample 7.4×10 ⁴ 98.9 caused by staphylococcus
antibacterial test Blank
2.6×10 ⁵ 6.0×10 ⁶ - Original 1a sample 4.2×10 ⁴ 99.4

According to the test method of KFIA-FI-1042, the inventors of the present invention tested the sample having the functional layer 10 of the present invention and negative ions emitted from the object to be measured under conditions of room temperature of 20°C, humidity of 40%, and negative ion number in the air of 110/cc. Table 6 shows the number of IONs per unit volume measured.

sample name Anion (ion/cc) Samples having the functional layer (1a) of the present invention 112

The present invention is a technology for providing a packaging container in which a functional material providing waterproofness, far-infrared radiation, deodorization, and antibacterial properties is coated on corrugated cardboard and consequently provided to have a function of maintaining freshness. I tried to do an experiment to store tomatoes, and the results of testing tomatoes are as follows.

Tomatoes are raw vegetables, so even after harvesting, metabolism such as respiration and enzyme action proceeds, resulting in changes and consumption of the components of the food itself, resulting in ripening, and when metabolism is vigorous, corruption occurs. Acidity, color, reducing sugar, and vitamin C contents were measured and compared while tomatoes were stored in a general corrugated cardboard box.

1) Acidity and color change

The acidity according to the storage period of the food was measured after storing the tomatoes in the control group stored in a general corrugated cardboard box and the functional corrugated packaging container coated with the functional ingredient of the present invention for 2 days at 15 ~ 18 ℃, and then measuring the acidity. It decreased on both sides of the experimental group, and a small decrease in acidity was observed overall, but there was no particular difference. .

2) Changes in reducing sugar

As a result of measuring reducing sugar after storing tomatoes at 15-18 ℃ for 2 days, the test group stored in the functional storage container was measured slightly higher than the control group stored in the general packaging box.

3) Vitamin C

As a result of measuring the change rate of vitamin C after storing the tomatoes at 15 ~ 18 ℃ for 2 days, the experimental group stored in the functional storage container had higher preservation than the control group stored in a general corrugated box. Vitamin C retention was also confirmed to be high.

In the above, the functional corrugated cardboard packaging container to be obtained in the present invention provides waterproofness, far-infrared radiation, deodorizing ability, and antibacterial properties to provide a freshness maintenance function during the storage process of food. Manufacturing examples or experimental examples have been described. Various modifications and implementations will be possible from the description of the present application by those skilled in the art of food storage containers or those skilled in the art to which the present invention belongs, and therefore, the present invention is equally protected to the extent that it does not depart from the technical spirit of the claims. It should be.

10: surface paper of corrugated cardboard 20: back paper of corrugated cardboard
30: core of corrugated board 40: functional ingredient coating layer
100: packaging container of the present application (unfolded state)

Claims (5)

In the manufacturing method of a packaging container provided to have a freshness maintaining function by coating a functional material that provides waterproofness, far-infrared radiation, deodorization, and antibacterial properties to corrugated cardboard,
58-62% by weight of acrylic emulsion, 8-12% by weight of EVA (Vinyl acetate ethylene), 6-10% by weight of polysol, mulberry concentrate A first step of obtaining a waterproof functional liquid that is mixed with 20 to 24% by weight of water provided by the process to give waterproof and strength reinforcing performance;
40 to 50% by weight of elvan powder, 20 to 30% by weight of ocher powder, 20 to 30% by weight of pojolan, and 5 to 10% by weight of tourmaline powder to impart far-infrared and anion radiation to the packaging container. a second step of obtaining ceramic powder (1);
In order to give the packaging container a deodorizing function, 90 to 95% by weight of pulverized minerals and 5 to 10% by weight of molten salt powder are mixed with amphibole, a silicate mineral, and serpentine, a hydrous magnesium silicate mineral, in a 5±1:5±1 ratio. a third step of obtaining the entrained ceramic powder (2);
50 to 60% by weight of the waterproof functional solution obtained in the first step, 20 to 30% by weight of far-infrared and anion functional ceramic powder obtained in the second step (1), and 10 to 20% by weight of the ceramic powder obtained in the third step (2) , a fourth step of obtaining a mixed coating solution comprising 1 to 5% by weight of shungite to impart continuous antibacterial performance;
After the mixed coating solution obtained through the fourth step is applied or coated on a base paper selected from the surface paper 10, the back paper 20, and the corrugated paper 30 forming corrugated cardboard, curing in an aging room maintaining the range of 120 to 130 ° C. A method for producing a functional packaging container, characterized in that applied to obtain a packaging container having waterproofness, far-infrared radiation, deodorization, and antibacterial properties. delete According to claim 1,
The method of manufacturing a functional packaging container, characterized in that the elvan powder used in the second step is applied to be replaced with white sand soil powder. According to claim 1,
The ceramic powder used in the third step contains amphibole and serpentine in a 6:4 ratio, and the chemical composition is SiO ₂ 40-50% by weight, MgO 25-30% by weight, Fe ₂ O ₃ 7-10% by weight, Al ₂ O ₃ 1-3 wt%, CaO 3-4 wt%, Na ₂ O 1-2 wt%, TiO ₂ 1-2 wt%, K ₂ O 0.1-0.2 wt% Method for producing a functional packaging container, characterized in that the deodorant is used. Functional packaging container made by the manufacturing method of claim 1 to have waterproofness, far-infrared radiation, deodorization, and antibacterial properties

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