• 한국포장학회지
• /
• 제11권1호
• /
• pp.25-32
• /
• 2005

This study was conducted in 2005 to investigate the current status of total packaging industries in Korea. The trends in development of the packaging industry were observed and interpreted as several factors such as the number of packaging industries, the number of employee in packaging industries, size, employee salary, and locations of packaging industry. The number of companies showed the increase of 6.3% per year until 2002 compared to 2175 companies at packaging industry in 1991. Based on the data of the number of companies to produce packaging materials, the packaging companies for plastic, metal, and wood were rapidly increased up to over 9%, whereas the glass and paper companies were only increased in 2%. The number of paper, plastic, wood, and packaging machine companies located at Seoul in 2002 was showed the great reduction, except to glass company compared to the number of the packaging industries in 1993 according to location of the company. Value added per employee in total packaging material industries were showed about 53-thousand dollars in 2002. These values were showed about 64.5% for total manufacture industries and increased to 8.1% from 1991 to 2002.

• 한국산림과학회지
• /
• 제102권4호
• /
• pp.506-514
• /
• 2013

본 연구는 목재산업 클러스터 구축에 있어서 중요한 위치를 차지하고 있는 목재산업화지원센터 설립을 위한 타당성을 검토하였다. 목재산업화지원센터를 설립하기 위해 할인율 3.5%, 투자기간 4년 및 사업운영 16년, 투자비 246억 원을 투자할 경우, 20년간의 순현재가치 합계액은 2,579천 원으로 나타났고, 비용편익비율은 2.51%, 내부수익률은 10.1%로 산정되었다. 또한, 다지역 투입산출모형을 사용하여 파급효과를 검토한 결과, 전라남도 지역 관련산업의 생산유발계수는 1.4345이고 생산유발효과는 약 352.87억 원, 소득유발계수는 0.1655이며 소득유발액은 약 40.7억 원, 고용유발계수는 0.4665와 고용유발효과는 약 1,145명으로 추정되었다. 따라서 공공성이 강한 시설로 단순히 상기 분석을 통해 사업성 시행여부를 결정할 수는 없으나 운영에 따른 자체 발생비용을 운영수입으로 충당할 수 있는 재무적 독립이 가능한 사업으로 판단되었다.

• Journal of the Korean Wood Science and Technology
• /
• 제48권3호
• /
• pp.291-302
• /
• 2020

As the properties of the melamine-urea-formaldehyde (MUF) resins were changing during their storage time, this study investigated the impacts of the synthesis method and melamine content of the MUF resins on the pH, apparent viscosity, molecular weights, and crystallinity to estimate these properties over storage times of up to 30 days. Melaminesat three addition levels (5, 10, and 20 wt% based on the resin solids) were simultaneously reacted with urea and formaldehyde (MUF-A resins), while those at the same addition levels were first reacted with formaldehyde and then with urea(MUF-B resins). The pH values of the MUF-A and MUF-B resins decreased linearly as the storage time increased; the apparent viscosity increased linearly for the low melamine contents (5% and 10%) but increased exponentially for 20%. As anticipated, the molecular weights (Mw and Mn) increased linearly with the storage time, with a steeper increase in the Mw of the MUF-B resins compared with that of the MUF-A resins. The crystallinity of the two resin types decreased with storage time at higher melamine content. The relationships between these properties and the storage time made it possible to estimate the property changes in these resins synthesized by the different synthesis methods and melamine contents; this could help predict the properties of such resins in the industry during their storage.

• Journal of the Korean Wood Science and Technology
• /
• 제24권1호
• /
• pp.17-26
• /
• 1996

This research was accomplished to evaluate possibility of using paper sludge for the raw materials of wood based panel products. The experimental panels were manufactured by four mixed ratios, the proportion of paper sludge to wood particle: 20:80, 30:70, 40:60, 50:50% (oven dry weight basis) and by three composition types, sludge-particle mixed board, three layered sludge-particle board and three layered particle board. They were tested mechanical (bending strength and internal bond) and physical properties (water absorption, thickness swelling and linear expansion). From the results they were shown that bending strength of mixed and three layered sludge-particle board were decreased with increasing of composition ratios of sludge. And the mechanical and physical properties of the boards of three layered composition types have superior to those of mixed composition type. Although composition ratios of sludge increased, the internal bond strength and dimensional stability of sludge-particle board not decreased quantitatively. We concluded that the mechanical and physical properties of three layered sludge-particle board were similar w those of three layered particle-board (control) made by our laboratory design. Therefore, it was recognized that paper sludge can be used as potential raw material in particle-board manufacturing industry.

• 펄프종이기술
• /
• 제45권5호
• /
• pp.30-36
• /
• 2013

Hydrophobic property of Kapok fiber was investigated by sequential removal of its components by different extraction methods. Acetone extraction for the removal of the hydrophobic extractives, holo-cel-lulose preparation after the removal of lignin and xylan extraction by potassium hydroxide was applied. The degree of hydrophobicity of each samples were measured by the water sorption ability. The water sorption ability of Kapok fiber was increased by the sequential treatment of acetone extraction, holocellulose preparation and xylan removal. Based on holocellulose compositional analysis by $^1H$-NMR spectroscopic method, the unusual high amount of the acetyl groups in the holocellulose of Kapok partially contributed to the hydrophobicity of Kapok holocellulose fiber.

• 펄프종이기술
• /
• 제42권2호
• /
• pp.35-40
• /
• 2010

Variations in hexeneuronic acid content in hardwood alkaline pulps were investigated to evaluate their contribution to kappa number. Out of diverse chemical pulps the highest hexeneuronic acid content were measured in yellow poplar kraft pulping, which was assumed to enhance ca. 7.0 of kappa number determined by acid permanganate consumption. In yellow poplar soda-anthraquinone pulping, hexeneuornic acid was contributed to increment of 5.0-6.0 kappa number. In eucalyptus alkaline pulping, hexeneuronic acid content was not significantly different from soda-anthraquinone pulping. Increment of Kappa number by hexeneuronic acid was 4.5-5.6 depending on pulping method and pulping time at target temperature.

• Journal of Forest and Environmental Science
• /
• 제30권1호
• /
• pp.145-151
• /
• 2014

본 연구는 전라남도 국제 목재산업박람회 도입 타당성을 검토하였다. 박람회 행사기간은 2016년 7월 23일(토)부터 8월 21일(일)까지 30일간, 장소는 전라남도 장흥군 남도국제교육원과 우드랜드와 전남목공예센터 일원에서 진행하도록 제안하였다. 예상 투자비는 45.0억원, 예측된 총 방문객은 1,627,478명으로 나타났다. 목재산업박람회 개최에 따른 경제적 파급효과는 3,445억원의 생산유발효과, 770억원의 소득유발효과, 3,899명의 고용유발효과, 1,430억원의 부가가치유발효과, 320억원의 간접세유발효과로 추정되었다. 성공적인 박람회 개최를 위해 조직위원회를 구축하여 지역 및 국가차원에서 추진되어야 함을 제안하였다.

• Journal of the Korean Wood Science and Technology
• /
• 제41권1호
• /
• pp.42-50
• /
• 2013

1980년대 중반 이후 국내 생산이 시작된 온돌마루(이하 합판마루)는 종전의 주택용 바닥재(PVC 바닥재)의 대체재로서 일반 소비자들의 폭발적인 수요를 얻어왔다. 그러나 최근 마루판 산업은 건축경기 악화 및 산업 환경의 변화로 인한 수요의 감소와 그에 따른 생산율의 저하 등의 근본적인 문제점이 있다. 최근 마루판용 합판의 원재료로 주로 사용된 동남아산 수종의 고갈 및 변화로 인한 양질의 합판원재료 확보가 어려워졌다. 이에 대한 대응책으로 중국산 유칼립투스를 원재료로 부분적으로 이용한 마루판용 합판의 대체이용이 시도되고 있다. 본 연구에서는 유칼립투스 단판을 부심판으로 제조한 복합합판의 마루판용 합판의 원재료로서의 사용 가능성을 실험을 통해 비교분석하였으며, 모든 단판이 동남아산 Meranti로 구성된 합판을 대조군으로 설정했다. 변형에 영향을 미치는 인자로 단판 간 밀도차이와 합판의 밀도경사를 이용하였다. 본 연구의 실험결과는 다음과 같다. 1) 남양재 시험편은 병판의 밀도가 다른 단판의 밀도보다 큰 M자형의 밀도경사, 유칼립투스 시험편은 반대성향의 W자형의 밀도경사를 나타내었다. 2) 종류에 따른 마루판의 변형은 마루 가공 시험편이 합판상태로 가공을 한 경우보다 최소 0.1~최대 6.25 mm 적게 나타났으며, Density Profile 측정 결과 단판 간의 밀도차가 클수록 변형이 많이 발생하였다.

• 한국가구학회지
• /
• 제24권1호
• /
• pp.51-59
• /
• 2013

In this study, a dwelling type of Korea and Japan was compared, and consumption rate of domestic timber and its usage was also investigated. In Korea, dwelling type of apartment which constructed by iron and steel-concrete is main shared, but a detached house which is shared at 60% of dwelling type of Japan is mainly constructed by timber. And the rate of the consumption of domestic wood in Japan is 73%. In Japan, there is an effort to substitute imported wood to domestic timber through the promotion of using of domestic timber. Whereas the needs on using of domestic timber gradually emerged. So, the legal about sustainable use of wood is approved by the National Assembly on May 2012. There is not active movement in the aspect of using of domestic timber yet. These causes to the geographical and environmental characteristics, but industry, policy, and the difference of recognize on domestic timber utilization is thought to do greater influence. Hence, it is recommended to make a portfolio of both balanced domestic timber usage and the change of awareness of people by referring to the example of Japan.

• Journal of the Korean Wood Science and Technology
• /
• 제12권1호
• /
• pp.11-30
• /
• 1984

본(本) 연구(硏究)는 한국산(韓國産) 단판수종(單板樹種)의 목재특성(木材特性)을 조사(調査)하여 합판공업(合板工業)에 필요(必要)한 기초자료(基礎資料)를 제공하기 위해 실시(實施)하였다. 최근(最近) 목재자원(木材資源)이 점차 고갈(枯渴)되어 외재(外材)의 도입사정(導入事情)이 악화(惡化)됨에 따라 합판공업(合板工業)에 한국재(韓國材)의 활용(活用)을 증진(增進)시키고 그 가공기술(加工技術)을 발전(發展)시킴에 있어서 단판수종(單板樹種)의 목재특성(木材特性)에 관(關)한 연구(硏究)는 우선적으로 취급되어야 할 것이다. 본(本) 연구(硏究)에서 이들 취급(取扱)된 단판수종(單板樹種)은 우리 나라에 생장(生長)하고 있는 33개(個)의 속(屬)으로부터 50개(個)의 경제수종(經濟樹種)을 선정(選定)하였으며 이들 수종(樹種)에 대하여 주로 육안적(肉眼的) 목재특성(木材特性)을 조사(調査)하여 수종별(樹種別)로 기재(記載)하였고 이를 바탕으로 하여 침엽수재(針葉樹材) 및 활엽수재별로 목재식별(木材識別) 검소표(儉素表)를 간략(簡略)하게 작성(作成)하여 보고(報告)한다. 본(本) 연구(硏究)에서 육안적(肉眼的) 특성(特性)에 따른 식별(識別) 원표(圓表)를 작성(作成)하고 이를 바탕으로 하여 우리나라산(産) 단판수종(單板樹種)의 육안적(肉眼的) 식별(識別) 검소표(儉素表)를 나타내면 다음과 같다.