• 펄프종이기술
• /
• 제46권6호
• /
• pp.34-40
• /
• 2014

Wood fibers for medium density fiberboard (MDF) was used in the filler layer of the white duplex board for increasing thickness and bulk of the board. The MDF fibers and the old corrugated container (OCC) furnish were refined, and mixed together to form paperboard. At optimum mixing ratios and refining degrees, stiffness and tensile strength of the MDF fiber-containing board were higher than those of the board with 100% OCC. It was found that there was possibility to reduced basis weight of the filler layer down to 90% of the all OCC furnish by judicious selection of the mixing ratio and the refining method of the MDF fibers. Drainage rate increase and potential drying energy savings were additional benefits.

• 한국포장학회지
• /
• 제16권1호
• /
• pp.1-4
• /
• 2010

The compression strength of corrugated fiberboard containers for packaging the agricultural products rapidly decreases because of various environmental conditions during distribution of unitized products. Among various environmental conditions, the main factors affecting the compression strength of corrugated fiberboard are absorption of moisture, long-term accumulative load, and fatigue caused by shock and vibration. An estimated rate of damage for fruit during distribution is about 30~40% owing to the shock and vibration. This study was carried out to characterize the durability of corrugated fiberboard containers for packaging the fruits and vegetables under simulated transportation environment. After the packaging freight was vibrated at various experimental conditions, the compression test for the packaging was performed. The compression strength of corrugated fiberboard containers decreased with loading weight and vibration time. The multiple nonlinear regression equation ($R^2$ = 0.9198) for predicting the decreasing rate of compression strength of corrugated fiberboard containers were developed using four independent variables such as input acceleration level, input frequency, loading weight and vibration time.

• 펄프종이기술
• /
• 제35권2호
• /
• pp.33-38
• /
• 2003

In order to design the high strength corrugated fiberboard containers for agricultural products that can be used for the cold chain system, a large number of individual boxes were placed in various humidity environments at two different temperature of 5 and $20^{\circ}C$. The results indicated that temperature changes do not effect on physical strength of corrugated fiberboard containers as much as humidity changes did. The main conclusion from this study was that compression strength of corrugated fiberboard containers dropped significantly at high humidity condition, but the rates varied depending on the number of walls, temperature, and perimeter of containers. The packaging designer must consider the corrugated fiberboard boxes are also greatly affected by dimensional variations such as the length versus width ratio. Based on this study, water-resistant board would not be necessary if the ambient relative humidity does not reach to a critical point, 85 percent in the cold chain system. However, the designer must count for the unexpected fluctuation of rotative humidity resulting in severe loss of the compression strength of corrugated fiberboard container.

• 한국농업기계학회:학술대회논문집
• /
• 한국농업기계학회 1997년도 하계 학술대회 논문집
• /
• pp.99-105
• /
• 1997

• 월간포장계
• /
• 통권371호
• /
• pp.57-61
• /
• 2024

• 펄프종이기술
• /
• 제41권5호
• /
• pp.38-43
• /
• 2009

A conservation corrugated box for storing document archives was developed. The specifications of the double-walled E-flute corrugated conservation box were modified from those of the Library of Congress, USA. The Photographic activity test (PAT) of ISO 18916 was used to ensure protection of the archival contents from adverse effects of the container itself. Accelerated aging was conducted to evaluate the conservative properties of the box components. Atomic force microscopy was also used to evaluate changes in the cellulose surface due to accelerated aging.

• 대한안전경영과학회지
• /
• 제13권2호
• /
• pp.115-127
• /
• 2011

The aim of this study was to develop a standard to estimate safety factors of corrugated fiberboard containers used for agricultural products. This study is limited to fresh agricultural products packaged in the corrugated fiberboard containers and further work needs to be done, but we believe the data and results obtained by this research will greatly help to set proper package design for boxes. Especially, safety factor would be practically helpful for researchers for future study and packaging users to save packaging costs.

• 한국식품저장유통학회지
• /
• 제5권2호
• /
• pp.150-153
• /
• 1998

As strait As a result of the quality research of liner boards used for the national-made corrugated boxes for apples, basis weight of each sample passed its tolerance within 4%. We found that KA, WLK, and SC liner boards showed better in relative bursting strength. SC, WLK, KA, and SK performed better in relative compression strength. WLK201 and KA210 were good for the outside liner, and K2200 was adequate for medium and inside liner. we classified WLK and KA liner boards as A grade and others as C grade.

• 펄프종이기술
• /
• 제31권3호
• /
• pp.47-53
• /
• 1999

The effect of coating of liner components with oxidized starch on the properties of corrugated box was examined . Coating was carried out on liner components of B flute, single-wall corrugated board(SK180/S120/K200) , and corrugated box was made from the treated corrugated board. Box was made in a regular slotted container (RSC) style, and box compression strength was determined in the direction of top-to-bottom compression. The compression strength of box coated on outside liner component showed 15.4% improvement for 1.58g㎡ coating. On the other hand, the strength of box coated on outside liner component showed only 1.45% improvement for 1.41g/㎡ coating and 3.46% improvement for 2.32g/㎡ coating. Coating on inside liner component with oxidized starch at low coating weight more significantly improved box compression strength than coating on outside liner component, and the improvement was marked at the coating weight of 1.5-2.5g/㎡. In estimating top-to-bottom box compression strength, the experimental values were closer to the calculated values from McKee's equation suing edgewise compression strength of the combined board measured by column crush test than those from Kellicutt's equation using compression strength of component paperboards measured by ring crush test.

• 공업화학
• /
• 제10권3호
• /
• pp.367-373
• /
• 1999

OCC의 구성 특성을 조사하고 OCC로부터 elemental chlorine free (ECF)나 totally chlorine free (TCF) 표백을 통한 백색도 85% (ISO) 이상의 인쇄 및 필기용지를 제조하기 위한 연구가 수행되었다. American old corrugated containers (AOCC)는 Korean old corrugated containers (KOCC)보다 섬유길이가 길며, 주로 장섬유로 구성되어 있고 전자의 경우 약 80%가 unbleached kraft pulp (UKP)로 구성되어 있으나 후자는 20% 정도였다. 또한 KOCC의 경우 회분함량 (9.7%)과 NaOH 추출물 (19.3%)이 AOCC보다 현저히 높았다. AOCC로부터 ECF 표백이 가능한 펄프 (kappa no. 25이하, 수율 70%)를 생산하기 위한 증해조건은 활성알칼리 20%, 황화도 25%, Anthraquinone (AQ) 0.1%, 펄핑온도 $170^{\circ}C$, 증해시간 90분이다 (kappa no. 22.6, 수율 68%). KOCC의 경우는 증해시간을 60분으로 단축시킬 수 있었다. (kappa no. 16.4, 수율 66%) 증해된 AOCC 펄프를 TCF나 ECF 표백단계를 거치면 백색도 85% (ISO) 이상의 펄프를 생산할 수 있었다. 그러나 KOCC 펄프는 TCF 표백으로서 목표 백색도를 달성할 수 없었다. 표백 KOCC 펄프는 표백 AOCC 펄프에 비하여 연장지수가 낮으나 파열지수와 인열지수는 오히려 높은 경향을 나타내었다.