• 한국식품저장유통학회지
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• 제31권1호
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• pp.24-32
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• 2024

This study evaluates the microbial safety of ginseng sprouts packaged in moss and a modified atmosphere (MA) film within Styrofoam boxes. Ginseng sprout samples were stored at 4℃ for seven days, and the total fungi and aerobic bacteria counts, relative humidity, and moisture content were measured at 0, 1, 3, 5, and 7 days. During the storage period, both packaging treatments caused an increase in the total fungi and aerobic bacteria counts. However, by the seventh day, the ginseng sprouts packaged in the MA film demonstrated significantly lower counts of total fungi (3.03 log CFU/g) and aerobic bacteria (7.32 log CFU/g) than those in moss (3.66 and 7.63 log CFU/g, respectively). Moss packaging alone resulted in the total fungi count reaching up to 3.36 log CFU/g, with the aerobic bacteria count consistently exceeding 7 log CFU/g, highlighting the importance of hygienic management. Moreover, no significant differences were observed in the moisture content and relative humidity between the MA-film- and moss-packaged groups throughout storage. These findings indicate that the functional MA film is a more hygienic packaging solution for ginseng sprouts than moss.

• Journal of the Korean Wood Science and Technology
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• 제48권1호
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• pp.95-106
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• 2020

The purpose of this study was to determine the effects of coniferous essential oils (EOs) blended films on insect repellence and crop productivity. Low-density polyethylene (LDPE) film is widely used, especially in agriculture and for food packaging. Ethylene vinyl acetate was blended with LDPE to reduce volatilization of EOs. An EO from Japanese cypress (Chamaecyparis obtusa) was incorporated into the blend film to conduct field research on antimicrobial and insect repellent properties. Among the various concentrations of EO, the highest concentration (2.5%) showed the highest efficiency in terms of pesticidal activity. The ability to inhibit microbial growth can be explained by the lipophilic properties of the EO component, and many studies have already demonstrated this. Agricultural films containing all types of EO have been tested on various crops such as chili, cucumber, Korean melon and have been able to verify their effectiveness in avoiding pests and increasing yields. From these results, it was found that it is reasonable to use a modified film such as a composite film containing an EO for agriculture. Thus, the modified film containing EO has undoubtedly shown impressive potential for reducing the use of pesticides in a variety of ways, not only for agricultural mulching film but also for food and agricultural product packaging. This product is an environmentally friendly chemical and is safe for agricultural and industrial and food packaging applications, among others. In particular, the use of agricultural films significantly reduces the use of pesticides, suggesting that farmers can increase their incomes by reducing working hours and costs, and increasing production.

• 한국포장학회지
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• 제9권1호
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• pp.33-54
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• 2003

The aim of this study was to develop a model that could be used in the design of modified atmosphere packaging (MAP) for peaches. Respiratory data at 5, 10, $20^{\circ}C$ for peaches were gathered and altered for create useful respiration model. Packaging materials were conventional low density polyethylene and polypropylene with anti-fog, and anti-fungi treatments, and thickness was $30{\mu}m$ and $50{\mu}m$ each. Permeability tests were performed to find their oxygen, carbon dioxide, water vapor transmission rate as increases in temperature. Test results were then converted to logarithm format for MAP modeling. The maximum rate of oxygen uptake increased with increasing temperature. Optimum gas composition in the package system for fruits were set according to literature and upper or lower limits of oxygen and dioxide established. To predict gas composition at certain storage time, weight of fruits, film thickness, film type, and other variables, respiration rate was studied at various storage conditions. The results of tests were used to calculate Cameron's model and converted to a cubic estimation equation. The validity of the model was tested experimentally by observing actual atmospheric changes inside packages. This result of study may be useful for designing dynamic gas exchange MAP systems for similar agricultural products.

• 한국식품저장유통학회지
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• 제13권2호
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• pp.168-173
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• 2006

자몽종자추출물처리와 포장재에 따라 반건시 곶감의 품질 변화를 알아보고자 하였다. 자몽종자추출물에 반건시 곶감을 침지한 후 대조구(무포장), LDPE(low density polyethylene) 필름 포장구와 적층 필름 포장구 (Nylon/LDPE)로 각각 포장하여 $15^{\circ}C$에서 $60{\sim}100$일간 저장한 결과 다른 포장구보다 적층 필름 포장구(Nylon/LDPE)가 중량변화에서는 86%, 곰팡이 발생율은 60%, 갈변도는 50% 이상 낮게 나타났다. 자몽종자추출물(GFSE) 처리와 대조구의 분석실험에서 유의적 차이는 보이지 않았으나 자몽종자추출물 처리시에 반건시 곶감의 표면색도에서는 색변화 억제에 효과를 보였다.

• Food Science and Biotechnology
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• 제16권2호
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• pp.234-237
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• 2007

Water resistance of three biopolyester films, such as poly-L-lactate (PLA), poly-hydroxybutyrate-co-valerate (PHBV), and Ecoflex, and low density polyethylene (LDPE) film was investigated by measuring contact angle of various probe liquids on the films. The properties measured were initial contact angle of water, dynamic change of the water contact angle with time, and the critical surface energy of the films. Water contact angle of the biopolyester films ($57.62-68.76^{\circ}$) was lower than that of LDPE film ($85.19^{\circ}$) indicating biopolyester films are less hydrophobic. The result of dynamic change of water contact angle also showed that the biopolyester films are less water resistant than LDPE film, but much more water resistant than cellulose-based packaging materials. Apparent critical surface energy for the biopolyester films (35.15-38.55 mN/m) was higher than that of LDPE film (28.59 mN/m) indicating LDPE film is more hydrophobic.

• 한국식품영양과학회지
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• 제46권3호
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• pp.394-399
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• 2017

플라스틱 포장 폐기물로 인한 환경오염을 해결하기 위한 대안으로 생분해성 필름이 많이 연구되어 왔다. 본 연구에서는 우럭 껍질 젤라틴(RFG)과 nano-clay(Cloisite $Na^+$, 10A)의 복합필름의 특성에 관하여 연구하였다. 우럭 껍질로부터 젤라틴을 추출하여 sorbitol을 가소제로서 첨가한 단백질 필름을 제조하였고, 제조된 RFG 필름의 tensile strength(TS), water vapor permeability(WVP), water solubility(WS)는 각각 15.0 MPa, $2.70{\times}10^{-9}g\;m/m^2\;s\;Pa$, 53.8%였다. RFG에 nano-clay를 첨가한 복합필름은 TS가 증가하고 WVP와 WS는 감소하였다. XRD 분석과 SEM 측정 결과를 통하여 RFG/nano-clay 복합필름 내부에 박리형 구조를 형성함을 확인할 수 있었다. 결론적으로 본 연구 결과 RFG/nano-clay 복합필름은 생분해성 포장재로 적용될 수 있음을 시사한다.

• 한국식품저장유통학회지
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• 제4권1호
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• pp.11-15
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• 1997

This experiment carried out to find the storage life according to the kinds of packaging material. Sheridan(Grape) which was fumigated SO2 were wrapped with polyethylenes(Bio-PE and PE) and stored at $0^{\circ}C$ under 90% RH modified condition. The resorts were summarized as follow. Natural weight loss was increased according to the storage time during the 135days storage that was only 1.0-1.7% in sealing section while 10% in non-sealing section. Abonrmal fruits were increased as the storage time was increased and it was 6.6-6.7% in sealing section while 100% in non-sealing during the 135days storage. Quality of appearance and taste are better in sealing section than non-sealing section and it was good in Bio-PE sealing section between packaging materials. Moistrue content was de creased as the storage range was increased and the decreasing rate of that during the storage was 4.9-5.2% in sealing section between treatments. During the storage range increased, the soluble solid degree was increased in non-sealing section but decreased in sealing section.

• 한국포장학회지
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• 제17권2호
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• pp.43-46
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• 2011

포장재별로 처리한 딸기를 $10^{\circ}C$에 저장하면서 품질변화를 살펴보았다. 중량 감소율은 OPP필름에 비해 PLA 필름이 더 높은 것으로 나타났으나 저장 6일까지 0.12% 이하의 감소율로 처리구간에 큰 차이를 보이진 않았다. 경도의 경우 펀칭형 PLA3 포장구가 다른 처리구보다 가장 변화가 적은 것으로 나타났으며, 산도변화에서는 펀칭형 PLA2와 PLA3가 가장 적은 변화를 보였고, 색도의 경우는 포장구간에 유의적인 차이가 없었다. 가용성고형분 함량과 비타민C 함량 변화에서는 PLA2 포장구가 변화율이 가장 적었으며, PLA 필름구가 OPP 포장구 보다 높게 유지되었다. 딸기 포장재로 PLA 필름중 PLA2와 PLA3 필름이 저장에 효과적임을 알 수 있었다.

• Preventive Nutrition and Food Science
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• 제6권4호
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• pp.247-252
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• 2001

The need to determine the permeability of organic vapors to polymeric films such as aromas, flavors, etc. has significantly increased in the food industry because of preservation and safety issues along with migration problems. However, due to the complex nature of the permeation process, there have been few investigations compared to nonorganic compounds. In this paper, we review the history of permeability studies and typical methods of permeability measurement such as the isostatic method and quasi-isostatic method for organic vapors. New instrumental developments and significant findings are also introduced and discussed.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 학술대회 논문집 정보 및 제어부문
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• pp.156-158
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• 2004

Film printing companies have many problems during a printing process. Most of all, even an insect or dirt stick to the transparent film may cause severe errors until the end of printing job, which means big economic damage to the company. To prevent some insect-dots or dirt-dots, we have to Inspect the total area of film. However, it is very difficult to inspect the film in real-time due to the high-speed of printing that usually more than 150 m/min. A hardware based approach, for example DSP-based approach can be the one of solution candidates, but the total cost and the complexity increases the very high-level. In this paper, we suggest a software based approach, using MMX technology, to inspect the film in real-time. By Many real-plant experiments, we can see the suggest approach is applicable for the inspection of food packaging film in real-time.