Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Analysis of the Causes of Deformation of Packaging Materials Used for Ready-to-Eat Foods after Microwave Heating

즉석편의 식품용 포장재의 전자레인지 가열에 의한 변형 원인 분석

  • Yoon, Chan Suk (Packaging Research Center, CJ Cheiljedang) ;
  • Hong, Seung In (Packaging Research Center, CJ Cheiljedang) ;
  • Cho, Ah Reum (Packaging Research Center, CJ Cheiljedang) ;
  • Lee, Hwa Shin (Department of Food Processing and Distribution, Gangneung-Wonju National University) ;
  • Park, Hyun Woo (Department of Food Processing and Distribution, Gangneung-Wonju National University) ;
  • Lee, Keun Taik (Department of Food Processing and Distribution, Gangneung-Wonju National University)
  • 윤찬석 (CJ제일제당 포장연구센터) ;
  • 홍승인 (CJ제일제당 포장연구센터) ;
  • 조아름 (CJ제일제당 포장연구센터) ;
  • 이화신 (강릉원주대학교 식품가공유통학과) ;
  • 박현우 (강릉원주대학교 식품가공유통학과) ;
  • 이근택 (강릉원주대학교 식품가공유통학과)
  • Received : 2014.07.01
  • Accepted : 2015.01.16
  • Published : 2015.02.28
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Abstract

The aim of this study was to investigate the deformation of packaging materials used for ready-to-eat (RTE) foods after the retort process and microwave heating. From the multilayer films consisting of polyethylene terephthalate (PET), polyamide (PA), and cast polypropylene (CPP) in a stand-up pouch form used for RTE foods, some deformation of the CPP layer, which was in direct contact with the food, was observed after the retort process and microwave heating. The damage was more severely caused by microwave heating than by the retort process. This may be attributed to diverse factors including the non-uniform heating in a microwave oven, the sorption of oil into the packaging film, and the different characteristics of food components such as viscosity, salt and water content. The development of heat-resistant packaging materials and systems suitable for microwave heating of RTE foods is required for the safety of consumers.

전자레인지 가열조리용 편의식품류는 레토르트 처리되어 장기간 저장 안정성이 부여되는 장점이 있는 반면, 높은 가열 조건으로 인하여 식품의 품질 저하뿐 아니라 내용물의 흡착에 의한 포장재의 착색이나 오렌지필과 같은 물리적 변화가 발생되기도 한다. 일부 매운 소스 제품들의 전자레인지 가열 조리 시 특정 부위에서 심한 포장재의 열 변형 현상이 확인되었다. 열화상카메라와 광섬유온도계를 이용하여 전자레인지 가열 중 포장재 내부의 온도 분포 및 변화 패턴을 관찰한 결과 내용물의 충진 경계인 액위선과 양 모서리 sealing 부위의 온도가 가장 높이 상승하여 hot spot이 형성되는 것을 확인하였고, 이때 온도는 순간적으로 최대 $190^{\circ}C$까지 상승하였다. 반면 내용물의 중심부에서는 온도 상승이 매우 느리게 이루어져 cold spot이 생성되었으며, 700W에서 2분 조리 후 도달 온도는 약 $55^{\circ}C$였다. 특히, 전자레인지 가열 시 내용물의 균일한 가열패턴을 보여주는 hot spot과 cold spot 사이의 온도 상승률은 최대 7,000배까지 차이를 보였다. 따라서 전자레인지 조리 시 내용물의 불균일한 가열로 특정 부위에 열이 집중되는 hot spot의 생성이 포장재 열 변형의 주요 원인으로 판단되었다. 이러한 가열 불균일성은 포장된 내용물에 함유된 당, 염, 수분과 같은 성분들이 점도에 영향을 주는 것에 기인하는 것으로 추측된다. 이러한 점도 변화는 궁극적으로 내용물의 물리적 또는 이온적 특성의 변화를 야기하고, 결과적으로 전자파가 내용물 내부로 침투하는 깊이가 감소되고, 이에 따라 내용물의 유전 특성과 대류 현상에 영향을 주는 것으로 판단된다. 그러나 전자레인지 조리 시 포장재 열 변형 문제의 완전한 해결을 위해서는 향후 포장된 내용물의 세부 성분 별 유전 특성에 대한 보다 세밀한 분석이 필요하며, 아울러 hot spot의 원인이 되는 식품 성분들의 적절한 함량 조절과 함께 포장재, 포장 형태 및 가열 조건 등에 대한 보다 포괄적이고 안정적인 포장시스템 설계와 개발이 필요할 것으로 판단된다.

Keywords

References

  1. Haque KE. Microwave energy for mineral treatment processes. Int. J. Miner. Process. 57: 1-24 (1999) https://doi.org/10.1016/S0301-7516(99)00009-5
  2. Decareau RV. Background of the development of microwave heating technology. pp. 3-4. In: Microwaves in the Food Processing Industry. Academic Press Inc., Ltd., London, UK (1985)
  3. GIA. Microwave Packaging; A Global Strategic Business Report. Global Industry Analysts, Inc., Kawasaki, Japan. pp. II-70-71, III- 89-90 (2013).
  4. Zhang L, Lyng JG, Brunton NP. The effect of fat, water and salt on the thermal and dielectric properties of meat batter and its temperature following microwave or radio frequency heating. J. Food Eng. 80: 142-151 (2007) https://doi.org/10.1016/j.jfoodeng.2006.05.016
  5. Guardeno LM, Catala-Civeara JM, Plaza-Gonzalez P, Sanz T, Salvador A, Fiszman SM, Hernando I. Dielectrical, microstructural and flow properties of sauce model systems based on starch, gums and salt. J. Food Eng. 98: 34-43 (2010) https://doi.org/10.1016/j.jfoodeng.2009.12.004
  6. Choi YH, Kim DK. Temperature distributions of inner microwave for various working conditions. J. Korean Soc. Mar. Eng. 34: 792-797 (2010) https://doi.org/10.5916/jkosme.2010.34.6.792
  7. Datta AK, Geedipalli SSR, Almeida MF. Microwave combination heating. Food Technol. 59: 36-40 (2005)
  8. Geedipalli SSR, Rakesh V, Datta AK. Modeling the heating uniformity contributed by a rotating turntable in microwave ovens. J. Food Eng. 82: 359-368 (2007) https://doi.org/10.1016/j.jfoodeng.2007.02.050
  9. Lobo S, Datta AK. Characterization of spatial non-uniformity in microwave reheating of high loss foods. J. Microwave Power E. E. 33: 158-166 (1998)
  10. Ryynanen S. Microwave heating uniformity of multicomponent prepared foods. PhD thesis, University of Helsinki, Helsinki, Finland (2002)
  11. Schiffmann RF. Microwave technology; A half-century of progress. Available from: http//www.foodprodutdesign.com. Accessed May. 01, 2014.
  12. Alin J. Migration from plastic food packaging during microwave heating. PhD thesis, KTH Royal Institute of Technology, Stockholm, Sweden (2012)
  13. Ohlsson T, Bengtsson N. Microwave technology and foods. Adv. Food Nutr. Res. 43: 65-140 (2001) https://doi.org/10.1016/S1043-4526(01)43003-8
  14. Jeong JY, Lee ES, Choi JH, Choi YS, Yu LH, Lee SK, Lee CH, Kim CJ. Cooking pattern and quality properties of ground pork patties as affected by microwave power levels. Korean J. Food Sci. An. 29: 82-90 (2009) https://doi.org/10.5851/kosfa.2009.29.1.82
  15. Datta AK. Fundamentals of heat and moisture transport of microwaveable food product and process development. pp. 115-172. In: Handbook of Microwave Technology for Food Applications. Datta AK, Anantheswaran RC (eds), Marcel Dekker Inc., New York, NY, USA (2001)
  16. CEN EN 1186-2. Materials and article in contact with foodstuffs- Plastics-; Part 2: Test methods for overall migration into olive oil by total immersion. European Committee for Standardization, Brussels, Belgium (2002)
  17. Korean Food and Drug Administration. Korean Food Code, Chapter 9. Common test method, Article 1. Test method for food constituents. Available from: http//fse.foodnara.go.kr. Accessed Oct. 21, 2014.
  18. Lakshmana JH, Jayaprahash C, Kumar R, Kumaraswamy MR, Kathiravan T, Nadanasabapathi S. Development and evaluation of shelf stable retort pouch processed ready-to-eat Tender Jackfruit (Artocarpus heterophyllus) curry. J. Food Process. Technol. 4: 274-279 (2013)
  19. Lee JH, Lee KT. Studies on the improvement of packaging of retorted samgyetang. J. Korea Soc. Packag. Sci. Technol. 15: 49- 54 (2009)
  20. Ni H, Datta AK, Torrance KE. Moisture transport in intensive microwave heating of biomaterials: A multiphase porous media model. Int. J. Heat Mass Tran. 42: 1501-1512 (1999) https://doi.org/10.1016/S0017-9310(98)00123-9
  21. Giese J. Advanced in microwave food processing. Food Technol. 46: 118-123 (1992)
  22. Puligundla P, Abdullah SA, Choi W, Jun S, Oh SE, Ko S. Potentials of microwave heating technology for select food processing applications-A brief overview and update. Food Process. Technol. 4: 278-286 (2013)
  23. Chandrasekaran S, Ramanathan S, Basak T. Microwave food processing- A review. Food Res. Int. 52: 243-261 (2013) https://doi.org/10.1016/j.foodres.2013.02.033
  24. Koskiniemi CB. Development of a 915 MHz continuous microwave process for pasteurization of packed acidified vegetables. MS thesis, North Carolina State University, Raleigh, NC, USA (2010)
  25. Hegenbart S. Microwave quality: coming age. Food Product Design 17: 29-52 (1992)

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