KR101128437B1 - An improved packing method for long-term preservation of the sweet persimmon and also packing efficacy - Google Patents

Abstract

PURPOSE: A sweet persimmon packing method for an automatic packing machine is provided to improve the efficiency of sweet persimmon packing by automating a packing process into double stages of small- and large-size packing. CONSTITUTION: A sweet persimmon packing method for an automatic packing machine comprises the steps of: placing two to five sweet persimmons on a Styrofoam support with a length of 20-30cm and a width of 10cm, packing the sweet persimmons into a small film bag with a length of 25-40cm, a width of 15cm, and a thickness of 0.03mm and sealing the small film bag through thermal bonding, punching three to five holes with a diameter of 100μm, three to ten small packages of sweet permissions into a large film bag with a length of 40-80cm, a width of 78cm, and a thickness of 0.05mm and binding the opening of the large film bag with a strap.

Description

An improved packing method for long-term preservation of the sweet persimmon and also packing efficacy}

The present invention relates to an automatic packaging method of sweet persimmon, and more particularly, to a packaging method suitable for maintaining freshness for the storage and extended shelf life of sweet persimmon and to an automatic packaging method for improving the efficiency of work during packaging. will be.

Fresh produce, such as sweet persimmon, undergoes physiological changes such as softening, discoloration, decreased sugar content, and reduced nutrient content due to respiration metabolism and lodging during storage, and sensory quality such as decay and odor caused by mold. As such, the main environmental factors affecting the quality deterioration after harvesting of fresh produce include temperature, humidity, and gas (oxygen, carbon dioxide) composition. Therefore, until now, academia has developed and applied various techniques to prevent such quality degradation in the field. It is a low temperature distribution technology that maintains quality by regulating crop metabolism and suppressing microbial generation through temperature and humidity management such as low temperature storage and cold chain, and in many cases, it is helped by Modified Atmosphere Packaging (MAP) technology. Modified Atmosphere Packaging (MAP) technology uses the principle that the plant's respiration metabolism is suppressed at low oxygen and high carbon dioxide concentration. When the fruit is wrapped in plastic film, the oxygen concentration is lowered inside the package due to the fruit's respiration and the carbon dioxide concentration is reduced. Is a technology that uses the effect of maintaining the quality of the product by suppressing the physiological metabolism of the packaged agricultural products. At this time, the change of gas composition in the package is affected by the gas permeation through the plastic film. Proper combination of gas permeation will determine the packaging gas composition. Therefore, the Modified Atmosphere Packaging (MAP) technology for maintaining the quality of fresh produce is an important prerequisite for proper packaging standards considering the respiratory characteristics of fruits. It is necessary to develop a packaging method that is automatic packaging technology.

In Korea, the freshness has been maintained for a long time by packaging sweet persimmon using low density polyethylene (LDPE) plastic film. Typically, five units of sweet persimmons are packed in a low density polyethylene (LDPE) film bag with a thickness of 0.06mm, stored at an appropriate storage temperature of 0 ° C, and shipped for sale. In refrigerated storage, modified atmospheres are formed inside these film packages, resulting in oxygen concentrations of 1 to 5% and carbon dioxide concentrations of 3 to 8%, which are known to be effective in maintaining the quality of sweet persimmons. Is being used. The optimum gas condition for better quality preservation at low temperature of 0 ℃ is known to be in the range of 0.2 ~ 1% oxygen and 4 ~ 15% carbon dioxide. When the oxygen concentration rises to 3% or more, black skin stools occur, and when the oxygen concentration falls below 0.2%, pulpy browning occurs, which becomes more severe when carbon dioxide is accumulated at a concentration of 15% or more.

However, five packaging conditions using 0.06mm-thick low density polyethylene (LDPE) film bags, which have been utilized so far, are suitable gas composition maintained at an appropriate level during low temperature storage at 0 ° C. When exposed to high temperature circulation environment, the persimmon fruit respiration is excessively increased compared to the gas permeation of plastic film. Therefore, oxygen is depleted inside the package and carbon dioxide concentration exceeds 15%. Recently, Korean persimmons, which are about 10,000 tons per year, have been exported to tropical regions of Southeast Asia such as Malaysia and Singapore.At this time, the rapid deterioration of quality due to high temperature in the export market is the main cause of the cracks. There is a demand for technology development. In recent years, there has been a demand for various packaging units from consumers, and there is a need for optimization of packaging conditions for various conditions.

For example, Korean Patent Publication No. 2000-30480, and Korean Patent Registration No. 10-529803. In addition, the inventors of the present invention first applied for a packaging method for long-term freshness maintenance of sweet persimmon as No. 10-2010-44987.

The present invention has been made in view of the prior art as described above is to provide a plastic packaging standard that can maintain the freshness of sweet persimmon and an automatic packaging method that can achieve this efficiently. Another object of the present invention is to provide a packaging condition for maintaining the proper gas composition inside the package while considering the storage and distribution step of sweet persimmon. Accordingly, the present invention is based on the premise that the persimmon-packed sweet persimmons are harvested and stored in large-scale after harvesting and transported to the consumer, and then the large-scale packages are dismantled and displayed and sold in small-package at a retail store or consumer. It has the advantage of improving the efficiency of sweet persimmons while improving the efficiency.

The object of the present invention was achieved by packaging the sweet persimmon with a plastic film and then packaging the plastic film using a fruit stand in units of 3 to 20 kg and then packaging the plastic film into a box.

The present invention has an excellent effect of improving the efficiency of persimmon packaging and improving the long-term lead-in effect at the same time by automating the packaging operation in two stages of small packaging and large packaging.

1 is a view showing the concept of the master packaging containing the present invention single wrap sweet.
Figure 2 is a graph showing the change over time of gas composition in the packaging according to the present invention Examples 1 to 2 (control: including the practice).

The present invention improves the present inventors patent application No. 10-2010-0044987 "packing method for long-term freshness of sweet persimmon" to 3 to 20 kg after packaging the persimmon with plastic film in 2 to 5 units It is composed of plastic film in units and put in a cardboard box, and the use of pedestals to effectively carry out the packaging work by mechanizing small packing work into 2 ~ 5 units and the size and number of micropores per small packing unit Include. The concept of the present invention can be described with reference to FIG. 1 and the difference from the previously filed patent application No. 10-2010-0044987 is as follows.

First of all, the above-mentioned invention proposed as an ideal idea focusing on the theoretical concept of pavement for maintaining freshness of sweet persimmon, while the present invention is a method that can be applied in the actual field in consideration of the current trading conditions and convenience of work. Designed around

That is, in the present invention, the selling unit of the storage persimmon is conventionally based on 5 packings, whereas the individual packing using the automatic packing machine has only 1 packing unit, which is different from the existing distribution practices, causing confusion between consumers and producers. There is a real difficulty in packaging individual packaging in the existing market. Therefore, there is a need to automate the packaging into two to five packaging units similar to the existing five packaging units. For this purpose, a method of automatically packaging two or more units using a pedestal was attempted.

The goal of the two-stage packaging is to maintain the gas composition in the small package during low temperature storage near 0 ^o C, at an oxygen concentration of around 1% and a carbon dioxide concentration in the range of 4 to 15% to suppress physiological changes in sweet persimmons. By removing the master packaging is to keep close to the gas composition even at 5 ~ 15 ℃ distribution temperature, such as supermarkets. The packaged sweet persimmon has a two-stage gas permeation resistance of the microperforated small packaging film and the master packaging film during cold storage, and in the retail distribution stage, the master packaging is dismantled and exposed to the outside in a microperforated small package. Such a packaging structure provides a proper gas composition inside by limiting gas permeation relatively in comparison with low breathing in low temperature storage near 0 ° C. where the temperature is low. However, in the retail distribution stage, display showcases and outdoor air are increased to about 5 ~ 15 ^o C, so the gas permeation should be relatively high to maintain this gas composition. Therefore, in the present invention, by appropriately adjusting the permeability of the micro-perforated small package and the master packaging, the gas composition around sweet persimmons is maintained at a level that helps maintain quality at long-term storage at around 0 ° C. and retail sales at around 5 to 15 ^o C. Let's do it.

The gas permeability of the small package and the master package should be properly controlled in order to carry out the above-mentioned goals and functions. To this end, the packaging conditions should be designed considering the respiratory properties according to the temperature of persimmon and the oxygen and carbon dioxide permeability of the plastic film. . Based on the respiratory properties of sweet persimmons and the gas permeation properties of plastic films grasped by the inventors, proper packaging conditions could be established by prediction and experiments by mathematical packaging design models. Small packages containing 2 to 5 persimmons should be subjected to relatively high gas permeability conditions by drilling 1 to 50 micropores of 20 to 150 μm in a 0.02 to 0.08 mm thick polyethylene or polypropylene-based film. However, the area of the fine hole is 7x10 ^-9 ~ 6x10 for the entire Bunch wrapping film ^area-to be maintained the ratio of ^seven. Small packages should be sealed with heat seal using automatic packaging machines. The master package can be configured with a total weight of 3 to 20 kg and can be heat-sealed or bound sealed with polyethylene or polypropylene-based films of 0.04 to 0.10 mm thickness. In addition, during long-term storage in the master packaged state, the persimmon respiration increases due to unexpected temperature changes, such as CaO, zeolite, silica gel, etc. Water / carbon dioxide absorbents may also be included. The amount of water / carbon dioxide absorbent should be determined in consideration of the respiration and water evaporation rate of sweet persimmon, and the inventors have determined that the water / carbon dioxide absorbent of CaO, zeolite, and silica gel is less than 2% of the sweet persimmon weight. When controlled, humidity control and carbon dioxide concentration inside the package were possible.

< Example  1 to 2>

Three pieces of 210 ± 10 g of heavy weight were placed on a styrofoam pedestal having a length of 24 × 10 cm and placed in a polypropylene bag of 30 cm in length and 15 cm in width, and then packaged and heat-sealed. Two polypropylene bags were perforated with three to five micropores, each having a diameter of 100 μm, to achieve proper gas permeation. The single persimmon package was packed in a 0.05 mm polyethylene film bag with a length of 40 × 78 cm in width. And the inlet was sealed with a mechanical tie. This master-packed sweet persimmons in a agricultural product packaging cardboard box (44 x 32 x 24.5 cm) and stored at -1 ± 0.5 ℃ (Example 1).

On the other hand, a package containing three moisture / carbon dioxide absorbents containing 30 g of silica gel and 5 g of zeolite in a polyethylene bag (9 × 9 cm) having a thickness of 0.012 mm in the master package was stored under the same temperature condition (Example 2).

As a control, it is currently used for export packing in Southeast Asia, and 24 persimmons were placed directly in a 0.05 mm thick polyethylene film bag 40 × 78 cm in width without binding. All packages of 5kg units were stacked in two tiers with 31 x 40.5 cm wide cardboard for internal loading stability.

Figure 2 shows the gas composition in the package for each treatment. Treatments using small or three microperforated micropackages maintained low oxygen and high carbon dioxide concentrations in non-packaged practices. The gas composition in the package, which is thought to affect the quality of the storage persimmons, was deformed faster than the gas composition at the practice, reaching about 1% oxygen and around 10% carbon dioxide after 30 to 60 days of storage. It was only after 100 days of storage that the change in gas composition was faster than that in the case where oxygen concentration was near 1% and carbon dioxide concentration near 5%, and the degree of change was large. Under the influence of the gas composition conditions, the sweet persimmons of three or five microperforations maintained excellent hardness during storage, and in particular, after storage, in order to simulate the distribution stage, the 10 kg unit was dismantled and left at 10 ° C. In case it was marked. Ie 62 days at -1 ° C. The quality of sweet persimmon after 5 and 10 days at 10 ° C. after 97 days of storage can be clearly compared in [Table 1] and [Table 2]. The small packages separated from the master packaging are not exposed to the atmosphere (20.9% oxygen, 0% carbon dioxide) like the conventional ones, and remain inside the deformation gas, so they remain around 1% oxygen and about 15% carbon dioxide. The occurrence of browning was significantly suppressed. In particular, when comparing the three-perforated packaging and the five-packaged packaging, it was judged that the storage capacity and the quality maintenance effect were better in the three-perforated packaging.

The present invention has the effect of improving the packaging automation efficiency and at the same time to achieve the leading maintenance of the sweet persimmon by packaging and storing the sweet persimmon after large packaging, and in particular, it will greatly contribute to enhancing international competitiveness by improving the quality of Korean agricultural products exported to overseas. It is a very useful invention that can be.

Claims (2)

2 ~ 5 pieces of sweets are placed on a styrofoam base of length 20 ~ 30 × width: 10cm, packed in 0.03mm thick polypropylene or polyethylene film bags of 25 ~ 40cm in length and 15cm in width. After drilling three to five micropores with a diameter of 100 μm, and then packing the persimmon small packages 3 to 10 packs again in a 0.05 mm polypropylene or polyethylene film bag having a length of 40 to 80 × width: 78 cm A packaging method for an automatic packaging machine for persimmon packaging, characterized in that the inlet is sealed by a mechanical tie strap and stored in a corrugated cardboard box.
A small package or large packaged sweet persimmon packaged by the method of claim 1.

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