• 한국포장학회지
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• 제5권1호
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• pp.13-20
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• 1999

Not only is it important that the physical properties of the paperboards be appropriate for the intended end use, but the proper arrangement of the component in the built-up board is essential for attaining the optimum moment of inertia and the maximum load-carrying ability in a box. It is known to be impossible to estimate the stress distribution and deflection pattern by experiments or theoretical analysis when the corrugated fiberboard get the bending force. This study was tried theoretical and finite element analysis to analyze structural strength characteristics of corrugated fiberboards. If the linerboard and corrugating medium of every corrugated fiberboards is made from the same material, the location of neutral axis comes close to inside liner in order of DMA, DM, DMB, SW and DW, and moment of inertia of area decreases in order of DMA, DMB, DW, DM and SW. With the finite element analysis, deflection of applied loads represented SW, DM, DMA, and TW in the order of their value.

• 한국포장학회지
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• 제14권1호
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• pp.23-29
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• 2008

The market sales of fresh-cut fruit and vegetables have grown rapidly in recent decades as a result of changes in consumer trend. Choosing the proper pretreatment of fruit and vegetables before minimally processing is very important because appearance is the most fundamental factors affecting the quality of fresh-cut products. This review describes the biochemical bases for color changes of fruit and vegetables including browning, discoloration, and color changes of carrots and alliums. Understanding pathway of pigments in minimally processed fruit and vegetable and preventing the way of color change should be emphasized for successive packaging system. This review also describes pretreatment of fresh-cut fruit and vegetables to improve the prolonging the shelf-life and maintenance of its qualities.

• 마이크로전자및패키징학회지
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• 제22권4호
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• pp.105-109
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• 2015

이 연구에서는 자동차용 에어백 작동에 쓰이는 가속 센서에 대해, 그 실장 방법에 따른 신호 전달 차이를 해석하였다. 실장 방법은 기존에 쓰이는 하우징을 사용한 모듈 형태와, 센서를 직접 자동차의 구조물에 접합재를 사용하여 부착하는 두 가지 방법을 고려하였다. 신호 전달을 분석하기 위하여, 충격 실험 장비가 구축되었고, ㄷ자형 알루미늄 채널을 이용하여 그 표면에 기존의 모듈 채결 방법과 센서를 직접 부착하는 방법을 사용하여 시편을 제작하여, 충돌 실험 후 측정된 파형을 비교하여 그 차이를 분석하였다. 또한 유한요소법을 이용하여 충격 실험을 모사하였고, 계산 결과를 실험 데이터와 비교하였다. 그 결과, 기존의 모듈형태의 부착 방법보다, 이 연구에서 제시된 접착제에 의해 직접 부착된 센서가 측정한 신호가 상대적으로 잡음없이 깨끗하고 강한 것을 알 수 있었으며, 또한 에어백 센서와 같은 MEMS 센서는 부착 방법에 따라 주변의 간섭 효과에 의해 그 성능이 크게 변하는 것을 알 수 있었다.

• 한국포장학회지
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• 제13권1호
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• pp.19-23
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• 2007

Shock and vibration inputs are transmitted from the transporting vehicle through the packaging to the fruit. The vibration causes sustained bouncing of fruits against each other and the container wall. The steady state vibration input may cause serous fruit injury, and the damage is particularly severe if the fruits are bounced at its resonance frequency. The determination of the resonance frequencies of the fruits and vegetables may help the packaging designer to determine the proper packaging system providing adequate protection for the fruits, and to understand the complex interaction between the components of the fruits when they relate to expected transportation vibration inputs. To analyze the vibration properties of the apples for optimum packaging design during transportation, random vibration tests were carried out. In the random vibration test, the resonance frequency and PSD of the packaged freight of apples in the test were in the range of 82 to 97 Hz and 0.0013 to $0.0021G^2/Hz$ respectively and the resonance frequency and PSD of the packaged apples in the test were in the range of 13 to 71 Hz and 0.0143 to $0.0923G^2/Hz$.

• 한국포장학회지
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• 제25권3호
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• pp.125-130
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• 2019

Shock and vibration inputs are transmitted from the vehicle through the packaging to the fruit. Inside, these cause sustained bouncing of fruits against each other and container wall. These steady state vibration input may cause serous fruit injury, and this damage is particularly severe whenever the fruit inside the package is free to bounce, and is vibrated at its resonance frequency. The determination of the resonance frequencies of the fruit and vegetables may help the packaging designer to determine the proper packaging system providing adequate protection for the fruit, and to understand the complex interaction between the components of fruit when they relate to expected transportation vibration inputs. Instrumentation and technologies are described for determining the vibration response characteristics of the pears for exporting with frequency range from 10 to 200 Hz, sweep rate of 1 octave/min, sweep method of logarithmic up and down and acceleration levels of 0.2, 0.4, 0.6, 0.8 and 1.0 G considering the domestic transportation environment. The resonance frequency of the pears ranged from 49.04 to 87.16 Hz and the amplitude at resonance was between 0.96 and 4.02 G in test frequency band and acceleration level. The resonance frequency and amplitude at resonance frequency band of the pears decreased with the increase of the sample mass. The multiple nonlinear regression equations for predicting the resonance frequency of the pears were developed using the independent variables such as mass, input acceleration.

• 한국포장학회지
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• 제23권1호
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• pp.47-53
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• 2017

최근 화훼 산업의 활성화를 위하여 정부 주도의 캠페인, 꽃 문화 확산 운동 등 화훼 소비 증대를 위한 활동들이 꾸준히 진행되고 있다. 절화류 상품은 MA 포장, 기능성 포장 개발 등 다양한 방법을 통하여 상품의 품질 유지를 위한 연구가 진행되고 있으나, 국내 분화류 제품의 경우 품질 개선 및 포장 디자인 등에 대한 연구가 여전히 미비한 실정이다. 또한 소형 분화류의 온라인 마켓 유통량이 점차 증가되고 있음에 따라, 산지에서 소매점, 소비자에게 이르기까지 제품의 품질 유지를 위한 다양한 구조 형태의 포장 개발이 요구되고 있다. 본 조사 연구는 소형 분화류 제품에 대한 소비자의 요구에 적합한 포장을 고려하기 위하여 기존 포장을 개선하는 목적으로 포장 소재 및 형태, 투명도, 편리성, 및 기타 포장 선호도 등에 대한 조사를 실시하였다. 결과로 플라스틱 포장 소재, 분리형 포장, 투명 포장 그리고 상품의 안정성 및 품질 유지를 위한 포장을 선호하는 것으로 파악되었다. 따라서 국내 소비자의 소형 분화류 상품 선호도 조사 연구를 바탕으로 향후 다양한 분화류 제품 및 제품 크기에 따른 상품화 가능성, 가격 변화 요인 등을 고려한 연구가 추가적으로 진행되어야 될 것으로 판단된다.

• 한국포장학회지
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• 제21권3호
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• pp.91-96
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• 2015

Fruit and vegetables are subjected to complex dynamic stresses in the transportation environment. During a long journey from the production area to customers using parcel delivery service, there is always some degree of vibration present. Vibration inputs are transmitted from the vehicle through the packaging to the fruit. Inside, these cause sustained bouncing of fruits against each other and container wall. These steady state vibration input may cause serous fruit injury, and this damage is particularly severe whenever the fruit inside the package is free to bounce, and is vibrated at its resonance frequency. The determination of the resonance frequencies of the fruit and vegetables may help the packaging designer to determine the proper packaging system providing adequate protection for the fruit, and to understand the complex interaction between the components of fruit when they relate to expected transportation vibration inputs. Instrumentation and technologies are described for determining the vibration response characteristics of the fruits with frequency range 3 to 150 Hz. The resonance frequency of the pear ranged from 53 to 102 Hz and the amplitude at resonance was between 1.08 and 2.48 G. The resonance frequency and amplitude at resonance decreased with the increase of the sample mass, and they were slightly affected by mechanical properties such as bioyield deformation and rupture deformation. Regression analysis was performed among the relatively high correlated parameters from the results of correlation coefficient analysis.

• 마이크로전자및패키징학회지
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• 제26권2호
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• pp.59-64
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• 2019

본 논문에서는 근적외선 다채널 형광 영상 시스템을 소개하고, 노출시간, 작동거리, 여기광의 강도에 따른 형광 영상 시스템의 특성에 대해 분석하였다. 노출시간이 길수록, 작동거리가 짧을수록, 여기광의 강도가 강할수록 형광신호가 증가하였다. 필터의 적절한 구성과 영상 모듈의 정밀한 패키징으로 배경신호의 증가를 억제하여 SBR이 증가하는 것을 확인하였다. 본 연구의 결과를 바탕으로 다채널 형광 영상 시스템을 활용할 수 있는 방안에 대해 제안하였다.

• 한국포장학회지
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• 제11권1호
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• pp.17-24
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• 2005

During handling unitized products, they are subjected to a variety environmental hazards. Shock and vibration hazards are generally considered the most damaging of the environmental hazards on a product, and it may encounter while passing through the distribution environment. A major cause of shock damage to products is drops during manual handling. The increasing use of unitization on pallets has been resulted in a reduction in the manual handling of products and with it a reduction in the shock hazards. This has caused and increasing interest in research focused on vibration caused damage. the use of pallets as a base for unitizing loads, aids in the mechanical handling, transportation and storage of products. Besides aiding in the handling, transportation and storage of products, a pallet also acts on and interface between the packaged goods and the distribution environment. The determination of the impact deformation of the cushioning materials such as tray cup (polymeric foam) and corrugated fiberboard pad must be carried out to design the proper packaging system providing adequate protection for the fruit, and to understand the complex interaction between the components of fruit when they relate to expected transportation vibration inputs. In this study, the theoretical analysis of impact deformation for cushioning materials by dynamic vibration. The impact deformations of SW and DW corrugated fiberboard pad in acceleration amplitudes of 0.25 G-rms and 0.5 G-rms that were usually generated in transport vehicles during distribution environments were very small compare with the thickness of corrugated fiberboard pad. The maximum of vibration acceleration level of tray cup by vibration impact was about 3.2 G-rms. The theoretical allowable acceleration (G-factor) of the pear was 0.7102 G-rms, and the maximum dynamic deformation estimated within G-factor was about 1 mm.

• 한국포장학회지
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• 제20권1호
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• pp.17-24
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• 2014

국내 딸기는 영양학적으로 우수한 과실로 소비자들은 대부분 신선한 생과로 이용하지만, 유통 기간이 매우 짧고 경도가 약하며 곰팡이에 의한 부패가 쉽게 발생하여 선도유지에 어려움이 있다. 딸기의 주요 부패균인 Botrytis cinerea, Rhizopus stolonifer는 생존율이 높고 쉽게 전이되어 품질 저하가 심각한 수준으로 이의 성장을 제어하기 위하여 수확 후 예냉, 이산화탄소, 이산화염소 처리 등을 있으며, 포장 처리 방법으로 modified atmosphere 포장, 가식성 코팅, 고산소 포장, 산소 흡착제 등을 적용하여 유통기간 연장 및 품질 개선 효과를 가진다고 연구 보고되었다. 딸기는 1차 포장 형태인 PET 용기에 담아 이를 골판지 상자에 포장하여 국내 및 해외 유통에 주로 이용하며 주요 수출국은 홍콩, 싱가포르를 대상으로 해마다 수출국이 늘어나고 수출양이 증가하고 있다. 최근 수출 딸기의 유통 기간 연장을 위한 품질 개선 필요성에 따라 다양한 유통 과정에 적합한 수확후 선도 유지 처리 연구가 요구되고 있으며 상품성 부여를 위한 수출 대상국 소비자의 기호성에 맞춘 개선된 포장이 필요하다고 판단된다.