• 한국펄프종이공학회:학술대회논문집
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• 한국펄프종이공학회 2006년도 PAN PACIFIC CONFERENCE vol.2
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• pp.365-372
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• 2006

In this paper, the possibility of statistical modeling from the pulp and peroxide bleaching condition variables to predict optical properties of a bleached chemimechanical pulp used in a newsprint paper machine at Mazandaran Wood and Paper Industries Company (MWPI) was studied. Due to the variations in the opacity and the brightness of the bleached pulp at MWPI and to tackle this problem, it was decided to study the possibility of modeling the bleaching process. To achieve this purpose, Multi-variate Regression Analysis was used for model building and it was found that there is a relationship between independent variables and pulp brightness as well as pulp opacity, consequently, two models were constructed. Then, model validation was carried out using new data set in the bleaching plant at MWPI to test model predictive ability and its performance.

• 펄프종이기술
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• 제46권6호
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• pp.8-15
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• 2014

The increase of wet web solid content in wet pressing will save drying energy greatly. We applied wood flours as spacers to increase the old corrugated container (OCC) solid contents in wet pressing. The mixed furnish of OCC and wood flours of 3-5% (wt/wt) increased bulk and drainage rate, and by increasing wet pressing pressure, its solid content started to be higher than 100% OCC furnish at more than 50% solid content level. Addition of cationic starch and drainage aid to the mixed furnish increased solid content further up to around 2%. Cationic starch addition compensated or exceeded the loss of tensile and compressive strength caused by the addition of wood flour, but drainage aid did not. Cationic starch also improved the stretch of the OCC, which could mitigate cracking at folding in boxboard.

• Journal of the Korean Wood Science and Technology
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• 제36권5호
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• pp.49-55
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• 2008

This study was carried to investigate the effects of steaming and four different drying methods on the longitudinal liquid permeability of Korean pine (Pinus koraiensis Sieb.et Zucc.) board. Four drying methods were air drying, conventional kiln drying, microwave-vacuum drying and high temperature drying. Darcy equation was used for calculating the specific permeability of the small sapwood specimens taken from the treated boards while capillary rising method was used for the heartwood specimens. The sapwood specimens were extracted with water and benzene-alcohol solution to examine the mechanism of liquid flow in treated wood. No significant correlation was found between specific permeability and the number of resin canals of the sapwood specimens. Extraction decreased the differences of specific permeabilities of the sapwood specimens between the five treatment methods. The effects of extraction on the longitudinal permeability are different between five treatments. The fluid path in heartwood was observed by dynamic observation method.

• 펄프종이기술
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• 제45권6호
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• pp.72-77
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• 2013

Tissue and paper manufacturing companies have common problems with increasing cost of imported virgin pulp and the restriction of using woods in the forest. Possibility of using bagasse pulp for solving those problems was studied. In order to reduce the production cost and study the dependency on pulps, bagasse pulp has been studied for mixing with Sw-BKP and Hw-BKP. Optimum blending ratio of wood pulps and bagasse pulp to enhance tissue properties were analyzed. Various properties of the hand sheet after blending of wood pulp and bagasse pulp were measured. As results, the bagasse pulp could substitute the hard wood pulp with similar properties of tissue. Therefore, we judged that the bagasse pulp was suitable for replacement of the hardwood pulp.

• Journal of the Korean Wood Science and Technology
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• 제41권3호
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• pp.258-268
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• 2013

목재산업은 녹색성장과 더불어 한국의 차세대 성장동력으로써 주목받고 있다. 또한, 지속적인 목재의 이용과 목재산업의 활성화를 위하여 "목재의 지속가능한 이용에 관한 법률"이 2012년 제정되었다. 자연으로부터 얻어진 목재자원의 가치를 향상시키고 선순환 구조를 지닌 목재제품이용의 확대를 통해 지속적인 성장을 동반하기 위해서는 목재제품 품질관리가 필요하다. 이 논문에서는 국내외 목재제품의 규격 품질표시제도를 살펴보고 국내 목재산업에의 적용을 위한 방안을 모색해 보고자 하였다. 제재목을 중심으로 미국, 캐나다, 뉴질랜드와 일본의 규격 품질표시제도의 운영현황에 대하여 조사하였으며 목재제품에 대한 규격 품질표시제도는 시스템 진화를 통해 생산자의 자발적 참여로 운영되는 제3자 인증제도로 발전됨을 확인할 수 있었다. 국내 목재제품의 규격 품질표시제도의 활성화를 위해서는 도입기에는 산림청 중심으로 일원화 시스템을 구축하여 조기정착을 유도하고 성장기 및 성숙기를 통해 인식구조 개선과 생산자의 자발적 참여를 위한 인센티브 개발 등의 기반을 마련하여 제3자 인증제도로 발전시켜야 할 것이다.

• 펄프종이기술
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• 제31권5호
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• pp.95-100
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• 1999

In order to find fungi having high treatment activity of kraft pulp bleaching (E1) effluent without any additional nutrietns, 124 strains of white-rot fungi were isolated from decayed wood samples. The author isolated five fungi(KS-62, MZ-400 , YK-719, YK-472 and Phanerochaete sordida YK-624) having high-decolorization activity of the E1 effluent. Particularly, the fugus KS-62 show the high effect of the decolorization and the degradation of the chlorinated lignin in the E1 , effluent compared with Coriolus versicolor and Phanerochaete chrysosporium.

• 펄프종이기술
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• 제31권5호
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• pp.12-17
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• 1999

This study was to evaluate applications of the alkalophilic enzymes from Coprinus cinereus 2249 with old newsprint(ONP). A enzymatic deinking process based on alkalopholic enzymes was investigated . It was found that alkalophilic enzymes could effectively deink old newsprint. When applied on deinking of the old newsprint, it increases the freeness and brightness due to effect of hydrolysis at 0.1% enzyme concentration . Also, the physical properties of deinked pulp were improved.

• 한국펄프종이공학회:학술대회논문집
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• 한국펄프종이공학회 2007년도 춘계학술대회논문집
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• pp.1-6
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• 2007

• 한국펄프종이공학회:학술대회논문집
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• 한국펄프종이공학회 2007년도 추계학술발표논문집
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• pp.331-337
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• 2007

• 한국펄프종이공학회:학술대회논문집
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• 한국펄프종이공학회 2007년도 추계학술발표논문집
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• pp.1-5
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• 2007