• Journal of the Korean Wood Science and Technology
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• v.41 no.3
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• pp.258-268
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• 2013

Wood-based products market is new growth engine industry of "Green growth policy". Korean government established a law, sustainable use of wood, for expanding wood and wood-based products market in 2012. This study was conducted to seek sustainable measures for conservation and management of valuable natural resources, offer expanding quality assurance services for wood-based products, and explore measures for expanding wood-based products labeling system. Through discussed domestic and overseas trends and literatures that concern wood-based products labeling system and investigated case studies that were presently operational. For expanding quality assurance services of wood-based products, Korea Forest Service operates a wood-based products labeling system in integrated management through variety awareness and specialist assessment for each product. This process will make enhanced wood-based products labeling system expanded gradually. To evolve into $3^{rd}$ party quality assurance services on maturity age of labeling system, public communication will help improve awareness of producer and consumer. appropriate incentive program will attract voluntary participation from woodbased product industry. Producers consider environmental ethics in their business and consumer should exercise their right to know.

• Journal of the Korean Wood Science and Technology
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• v.7 no.2
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• pp.31-51
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• 1979

• Korean Architects
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• no.9 s.174
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• pp.109-132
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• 1983

• The monthly packaging world
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• s.264
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• pp.110-119
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• 2015

식품의약품안전처는 기구 및 용기 포장의 효율적인 안전관리를 위하여 합성수지제 등이 도장된 금속제 및 목재류에 대한 규격을 개선하고, 국제기준과의 조화를 위하여 용출시험 조건을 개정하고자 한다. 또한, 규격 미설정 유해물질의 적부판정을 위하여 규격적용 규정을 신설하고, 폴리에틸렌테레프탈레이트의 안전성 향상을 위하여 아세트알데히드 용출규격을 신설하는 등 기구 및 용기 포장의 규격을 재정비하고자 기구 및 용기 포장의 기준 및 규격 일부개정고시를 발표했다. 본 고에서는 주요 내용에 대해 살펴보도록 한다.

• Journal of the Korean Wood Science and Technology
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• v.43 no.3
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• pp.374-380
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• 2015

The quality characteristics of the woodpellet manufactured from two domestic pines (Pinus densiflora S. et Z. and Pinus rigida Mill.) were investigated for the efficient energy use of woody biomass resources. Properties of woodpellets such as moisture content, heating value, ash content, apparent density and durability were determined by using the standard test method of woodpellets of Korea Forest Research Institute (KFRI) and elemental analysis. The results of elemental analysis for C, H, O and N showed 61.42% carbon, 5.56% hydrogen, 32.87% oxygen, and 0.15% nitrogen for Pinus densiflora S. et Z. and 61.03% carbon, 5.96% hydrogen, 32.83% oxygen, and 0.18% nitrogen for Pinus rigida Mill. No significant difference between Pinus densiflora S. et Z. and Pinus rigida Mill was observed on elemental analysis. Heating values of each woodpellet were ranged from 19.00 to 19.42 MJ/kg which satisfied the first grade quality standard (${\geq}18.0MJ/kg$) by KFRI. The ash contents of woodpellet were slightly different between Pinus densiflora S. et Z. and Pinus rigida Mill., and satisfied the first grade quality standard (${\leq}0.7%$) by KFRI. Apparent density of woodpellet (Pinus densiflora S. et Z.) was passed the first grade standard level (${\geq}640kg/m^3$), and woodpellets from Pinus rigida Mill. satisfied the second grade quality of the standard. The moisture contents of each woodpellet were satisfied by the first grade quality standard (${\leq}10%$). The durability of woodpellet (Pinus densiflora S. et Z.) was passed the third grade level (${\geq}95%$), but Pinus rigida Mill. woodpellet was insufficient to satisfy the quality standard.

• Journal of the Korean Wood Science and Technology
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• v.29 no.2
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• pp.91-99
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• 2001

In this study the possibility of classifying wood surface defects by image processing technique was investigated. An algorithm for the classification of wood surface defects, such as knot, check, and bark, on three Korean domestic species, Pinus densiflora, Quercus acutissima, and Carpinus laxiflora was also developed. Filtering was executed to separate dummies from the labels including real defect. Error rates in classifying knots on Pinus densiflora and Quercus acutissima were lower than 1% and error rates. In classifying check and bark in Quercus acutissima and Carpinus laxiflora could be lowered to below 13%.

• Journal of the Korean Wood Science and Technology
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• v.11 no.3
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• pp.39-48
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• 1983

This research was performed to investigate the manufacturing possibility of the particleboard treated with commercial fire retardant chemicals. Laboratory test boards at this investigation were made from particles treated by soaking into 5, 10, 15, and 20 percent concentration solutions of ammonium sulfate and Minalith before resin was applied. According to the results, MOR (modulus of repture) and MOE (modulus of elasticity) in flexure exceeded type 100 (100 kgf/$cm^2$, $1.5{\times}10^4\;kgf/cm^2$) of the Korean Industrial Standard (KS F 3104). Except for 15 and 20 percent chemicals concentrations of Minalith, every internal bond stress values met type 100 (1.5 kgf/$cm^2$) of KS F 3104. However thickness swelling values of fire retardant treated particleboards were not reached in the Standard (12%).

• Journal of the Korean Wood Science and Technology
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• v.38 no.1
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• pp.49-55
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• 2010

morphologically different Larix Kaemferi Carr sawdust. The pellet characteristics included moisture contents satisfied the first grade (less than 10%) of quality standard of wood pellets announced by Korea Forest Research Institute. Densities were also adequate for the first grade (640kg/$m^3$) on the quality standard and there was no large difference in other characteristics of pellets, however, pellets manufactured with planer shavings had the highest density. Ash contents also passed the first grade (less than 0.7) of quality standard. But bark pellet exceeded the second grade (1.5%) in ash content. Lower absorption ratio of bark pellet showed the effect on hygroscpicity. The heating value of the manufactured wood pellets in this study exceeded the first grade of quality standard(more than 4,300 kcal/kg).

• Journal of the Korean Wood Science and Technology
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• v.37 no.1
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• pp.29-36
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• 2009

Recycling of wood wastes or residues is a good solution for a shortage of wood resources and a rise in the price. Shipbuilding wood wastes were almost used to produce the boards by milling. However, considering the economic value and insufficient resource, recycling with milling is dissatisfied method. This study has been carried out to investigate the recycling possibility of shipbuilding wood waste. There are two kinds of shipbuilding wastes: plywood waste and solid waste. From the results of this study, the following conclusions have been made: 1. Bending properties of plywood and laminated plywood lumber were tested by Korean Standard. 2. The main fracture mode of plywood waste and laminated plywood lumber is that of simple tension. 3. The recommended application for the recycling of shipbuilding wood waste are outdoor wood furnishings, indoor wood furnishings and some wooden building construction materials: interior raw material, wooden pallet, siding, paneling, flooring. picnic table, deck components, porch swing, landscaping timbers, residential fencing, patios, and boardwalks etc.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2000.04a
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• pp.38-38
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• 2000

풍력 발전용 회전 날개는 대형화되면서 종래의 목재나 금속재료로는 구조적 강도, 강성 및 피로수명, 경제성 등을 만족하지 못하게 되었고, 이를 보완하기 위해 복합재료의 사용이 불가피하게 되었다. 따라서 본 연구에서는 국내업체에서 생산하여 그 물성이 입증된 E-glass/Epoxy 복합재료를 사용하여 국내 기상조건에 적합한 풍력발전용 회전날개를 개발하였다. 그러나, 개발된 회전날개는 국내 기상조건에 적합하도록 설계된 것으로서 해외로 수출할 경우 국내보다 풍속이 큰 지역에서는 구조적 안정성 및 피로수명을 만족할 수 없게 된다. 즉, 개발된 회전날개의 외국시장 진출을 위해서는 국제규격에 따른 하중의 정의와 구조설계의 개선이 필요하다. 따라서 본 연구에서는 IEC 1400-1의 국제규격을 검토하여 이를 만족하도록 회전날개의 구조설계를 수행하였다. 그 결과 국제규격에 명시된 강도 및 피로수명을 만족하는 구조설계 결과를 얻을 수 있었다.