• Food Science and Biotechnology
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• 제18권5호
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• pp.1155-1160
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• 2009

Poly(lactide) (PLA)-coated paperboards were prepared by solution coating and thermo-compression coating methods and their effect of coating on the packaging properties such as tensile, water resistance, water vapor barrier, and heat sealing properties was tested. Compared with uncoated control paperboard, tensile strength (TS) of PLA-coated paperboard increased profoundly (2.2-2.6 folds) with slight increase in elongation at break (E). Water absorptiveness (WA) of the paperboard decreased 74-170 folds and water vapor permeability (WVP) decreased 6.3-22.1 folds by coating with PLA, which indicates an increase in the hydrophobicity of the surface of paperboard. Compared with polyethylene (PE)-coated paperboard, both PLA-coated paperboard exhibited 2.3 time higher heat sealing strength. In addition, the PLA-coated paperboards showed equal or higher wet TS than PE-coated paperboard. All the test results showed that the paperboard coated by the thermo-compression coating method was similar to or better than those of coated by the solution coating method.

• 펄프종이기술
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• 제39권1호
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• pp.69-77
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• 2007

Carton and corrugated paperboard have excellent convertibility characteristics that could be easily slitted, folded, and inserted to become a certain shape of box or case. This excellent processing characteristics of carton and corrugated paperboard as well as their recyclability will continue to make them possess high portion in packaging markets. However, staple, tape, or adhesive have been used to seal a paperboard packaging box or case. Staples among them have been frequently used in many cases because of their convenience. Staples could enter the inside the box and give wounds to the goods in the box or case. Furthermore additional handling and waste treatment costs in the making and recycling processes would be necessary when staple is used to seal box or case. This study has been carried out to develop non-staple paperboard packaging box & case designs that can be used to make non-staple boxes & cases. It is believed that the non-staple folding paperboard boxes & cases could be more environmental-friendly, beautiful, and economic than staple boxes & cases.

• 펄프종이기술
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• 제39권2호
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• pp.45-53
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• 2007

When micro flute corrugated paperboards are used for food packaging, they necessarily need to meet the requirements for the distribution, transportation, and storage of food. The requirements could vary ac-cording to the contents in the packaging boxes. Microflute corrugated packaging paperboard for hot foods such as just-made coffee and hamburger requires to have a decent resistance property against high temperature. Along with a recent trend for small-quantity-multi-item upgraded packaging, semiconductor products and consumer-electronic appliances become to be packed using the environmental friendly micro flute corrugated paperboard. In this case, the electric resistance property of the microflute corrugated paperboard becomes important. This study was carried out to investigate on the thermal conductivity and electric resistance properties of micro flute corrugated paperboard.

• 펄프종이기술
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• 제47권5호
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• pp.74-79
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• 2015

Wood powder is widely used in paperboard mills to increase bulk and reduce drying-energy consumption, but this material also deteriorates paper strength because it interferes with the bonds between fibers. Although there have been many studies done to improve the strength of paperboard containing wood powder, specific applications have not recently been observed in paperboard mills. In this study, we carried out a new approach for improving paperboard strength by developing a new organic filler with the ability to increase the bonds between fibers. The residue of tapioca starch was used as raw material to manufacture an organic filler. The functionalities, including bulk and strength, were evaluated by making handsheets containing either wood powder or tapioca organic filler, or a mixture of the two, and measuring their physical properties. The organic filler showed lower bulk improvement and higher paperboard strength than the wood powder. The mixture of tapioca organic filler and wood powder showed improved paperboard strength compared to wood powder alone. Therefore, tapioca residue can be used as a raw material to manufacture an organic filler for paperboard mills.

• 한국식품과학회지
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• 제21권2호
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• pp.238-241
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• 1989

국내 농수산물 유통용 골판지 상자의 65% 이상이 이중 양면골판지 (DW) 상자를 사용하고 있다. 이것을 양면 골판지(SW) 상자로 대체시 강도의 변화 및 경제성을 검토한 결과는 다음과 같다. 이중 양면골판지 상자에 비해서 양면골판지 상자의 압축강도는 46%에서 98%까지 높았고 가격은 8% 더 저렴한 경우도 강도는 높게 나타났다. 이중 양면골판지 상자를 양면골판지 상자로 대체시 날개부분에서 절약되는 금액은 405억원으로 자원 절약 효과는 13%에 달했다. 따라서 국내 골관지물 유통용 골판지 상자로는 양면골판지(SW) 상자로 대체하는 것이 바람직하고 사료되었다.

• 펄프종이기술
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• 제45권6호
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• pp.78-87
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• 2013

Even though the notice No. 2010-11 of the Ministry of Food and Drug Safety Administration that has been applied to analyze the content of the water soluble residue eluted from multi-layer paperboard was abolished in 2011, its application for the analysis on evaporation residue is still valid. There are very high possibilities that the noticed existing method gives the misleading result on the evaporation residue due to the water soluble starch eluted from the multi-layer paperboard. The quantitative analysis on water-soluble residue with starch content correction has been carried in the study using UV/Vis spectroscopy and HPLC. The UV/Vis spectroscopy absorbance analysis showed the large amount of the oxidized starch obtained from the aqueous residue eluted out of the multi-layer paperboard after the iodine, ${\alpha}$-amylase reaction, and starch hydrolysis. The residual content decreased by the correction through the enzyme hydrolysis.

• 펄프종이기술
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• 제39권3호
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• pp.30-35
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• 2007

Folding performance is very important in box manufacturing process using paperboard. To evaluate the folding performance of various paperboards, we measured the folding moment and folding behavior at the different folding angle and rate conditions. When linerboard with grammage of $300\;g/m^2$ was folded up to $90^{\circ}$, the compression break and delamination of sheet were observed. The maximum folding moment was little affected by folding angle, but it was increased logarithmically with folding rate. And the effect of paperboard thickness was significant. The maximum folding moment of MD sample was higher than one of CD sample by 40%.

• KSBB Journal
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• 제15권4호
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• pp.370-374
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• 2000

제약폐수처리장과 판지폐수처리장의 활성슬러지 또는 폭기 조 media로부터 분리한 균들과 type culture들을 첨가할 경우 제약폐수와 판지폐수의 처리에 도움을 주는지를 알아보았다 폐수에 균틀을 배양하였을 때, 제약폐수에서는 charcoal m media로부터 분리한 Bacillus종 (PC-3)이 특이하게 잘 증식하 여 24시간 배양후의 생균수가 $1.1{\times}10^6m/L$를 나타내었으며, 판지폐수의 경우에는 type cultute인 Bacillus subtilis KCTC 1028이 가장 잘 증식하여 24시간 배양후의 생균수가 $1.1{\times}10^7m/L$를 나타내었다. PC-3률 첨가하는 제약폐수의 회분식처 리실험에서 균첨가효과가 확인되었으며8일째의 첨가구의 C COD제거율이 무첨가구의 COD제거율에 비해 18% 더 높았다. Bacillus subtilis KCTC 1028 을 첨가하는 판지폐수의 회 분식처리실험에서도 균첨가효과가 확인되었으며, 24시간후의 첨가구의 COD제거율이 무첨가구의 COD제거율에 비해 14% 더 높았다. Bacillus subtilis KCTC 1028은 전분질원료 주정 폐 액에서 잘 증식하였으므로, 전분질원료 주정폐액을 Bacill따 s subtilis KCTC 1028의 경제적인 생산배지로 이용할 수 있다.

• 펄프종이기술
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• 제45권2호
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• pp.33-40
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• 2013

Powdered additive or organic filler is used to improve paperboard thickness and to reduce drying energy consumption in the Korean paperboard industry. In a previous study, we identified alternative non-lignocellulosic resources to wood powder, specifically brewers grain and oil palm frond powders, and verified that these materials had the same functionality as wood powder. The main drawback of the use of such additives, including both lignocellulosic and non-lignocellulosic resources, is the deterioration in paperboard strengths. Therefore, we carried out a basic study on the surface modification of brewers grain and oil palm frond powders to improve the strengths of paperboard. Surface modification was performed using various types of cationic and oxidized starches. The streaming current and zeta-potential of the two non-lignocellulosic powders were measured and CLSM images were taken to assess the surface modification.

• 한국식품저장유통학회지
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• 제5권4호
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• pp.335-338
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• 1998

골판지상자에 기능성 필름을 첨합한 포장상자(FC)의 배 저장 중 품질유지 상태를 조사하고자 대조구로 기존에 유통중인 골판지 상자와 0.02, 0.04mm의 LDPE필름과, 0.02와 0.04mm의 기능성MA필름(CE)에 배를 포장하여 5 C에 60일간 저장하면서 신선도 변화를 비교 고찰하였다. 중량변화는 대조구는 2.9% 감소했으며, FC, LDPE와 CE 포장구들은 1.0-0.5% 감소했다. 경도는 각 포장방법간에 차이가 없었으며 비타민C 함량도 필름포장구들과 FC 포장구에서 대조구보다 더 높게 유지되고 있었다. 산도와 당도는 대조구가 필름포장구들과 FC 포장구 보다 변화가 심하게 나타났고 전체적인 외관상의 기호도 FC 포장구와 필름포장구에서 양호한 것으로 나타났다. 이상의 결과에서 FC 포장재를 신선도 유지에 활용할 수 있을 것으로 판단되었다.