• Journal of the Korean Wood Science and Technology
• /
• 제33권3호통권131호
• /
• pp.79-88
• /
• 2005

연구는 폐표고목을 제지용 원료로 활용하기 위한 기초자료로 1년부터 5년 동안 재배한 표고골목을 이용하여 목재 성분 조성과 크라프트 펄프화 특성을 평가하였다. 그 결과 화학조성의 경우 변재에서는 재배기간이 증가함에 따라 글루코스와 자일로스의 감소가 크게 나타났으나 심재부에서는 큰 차이가 나타나지 않았으며 정선수율과 리젝트 함량 모두 재배기간이 증가함에 따라 감소하였다. 펄프 특성에서도 재배기간 증가에 따라 섬유장과 폭, 여수도는 감소하였으며 폐표고골목 크라프트 펄프를 국산 폐골판지에 첨가 시 종이의 건조 강도가 향상되었다. 이상의 결과로 폐표고목 크라프트 펄프를 다른 장섬유 펄프와 혼합사용 시 강도 향상과 고해 에너지 감소를 기대할 수 있을 것으로 사료된다.

• 펄프종이기술
• /
• 제42권2호
• /
• pp.53-60
• /
• 2010

Kudzu vine (Pueraria lobata) is a perennial plant and spreads all around in South Korea. Recently the use of leaves, stems and roots of kudzu vine has been investigated in many fields. However, the research on kudzu fibers has not been performed in korean pulp and paper industry. As the stems and roots of kudzu were estimated to contain cellulosic fibers, the possibility of producing a raw material from kudzu fibers in pulp and paper mills was investigated in this study. The stems and roots of kudzu were collected in woods, and then the chemical composition and ash contents was measured. To acquire kudzu pulp, kraft pulping and bleaching of kudzu roots were carried out sequently. After making kudzu pulp, freeness and fiber length were measured, and handsheets was also prepared with kudzu pulp and the properties of handsheets were determined. Consequently, kudzu fibers have lower holocellulose contents than wood fibers and other non-wood fibers. Average fiber length is shorter than that of Sw-BKP, but shows the same level as that of Hw-BKP. The handsheet made from kudzu pulp shows the bulkier structure than those made from Hw-BKP and Sw-BKP.

• 펄프종이기술
• /
• 제47권3호
• /
• pp.3-10
• /
• 2015

In this study, we evaluated properties of pulp treated with swelling agent and swelling concentration. We used swelling agent, such as NaOH, DMSO, urea. One of them, pulps treated with NaOH from 0 to 5% measured WRV, beating efficiency, crystallinity and aspect ratio. We identified that NaOH when freeness reaches 100mL CSF was the shortest, on the other hand, WRV didn't change. Because NaOH is good beating efficiency, when pulp treated with various concentration of NaOH from 0 to 5%, pulp treated 1% NaOH was best beating efficiency. However, WRV, crystalline structure and crystallinity didn't change. The more NaOH concentration increased, the more aspect ratio increased, but when NaOH concentration exceeds 3%, aspect ratio decreased. As a result, pulp treated with 1% NaOH was the greatest beating efficiency and WRV, chemical structure didn't change.

• 펄프종이기술
• /
• 제46권3호
• /
• pp.28-36
• /
• 2014

The kind and the mixing ratio of recovered papers would affect the quality of final recycled paper. In this study, effects of the mixing ratio of various domestic recycled papers (old news print (ONP), old corrugated container (OCC) and coated paper (CP)) on variations in physical properties of paper and its productivity were investigated. When the mixing ratio of CP grade increased, the freeness (CSF) of recycled pulp was increased while paper strength and white water turbidity was decreased. Paper strength was decreased as the percentage of OCC was higher than ONP. When ONP was mixed with OCC, no adverse effect was observed except the increased drainage resistance. It is expected that these results could be utilized as fundamental data to establish regulations for the recovered paper grades according to mixing ratios of different kinds of them.

• 패션비즈니스
• /
• 제21권5호
• /
• pp.15-29
• /
• 2017

The purpose of this study is to examine modern people's lifestyle and identify their needs by analyzing clothing behavior through city nomads' attitudes in dairy life, tastes, and methods to pursue in their life. This study tries to understand substitute values as ethical life emerging recently, free life style of mental emotion, clothing behaviors, and fashion style represented by the results. Upon observing city nomads' fashion trend, tunics symbolizing flexibility and comfort and simultaneously reflect colors in a monk style or from basic items that have been used. City nomads' fashion trend also reveals androgynous freeness-and-easiness. City nomads reflect a folksy inspiration, and different cultural perspectives appear in a mixed fashion. Multi-purpose gypsy/boho style is ideal for traveling and occupying smaller spaces in line with the nomadic lifestyle reflectings an American casual image partially by way of gypsy or bohemian nuances. Motorcycle jeans symbolizing functionality for traveling are becoming a part of everyday life. The fashions discussed are categorized as urban, tourer, sports and road. Everyday sportswear - athleisure - is attracting attention enabling a healthy and sound lifestyle. Athleisure is fashion wear harmonizing workplace with leisure, and everyday life and social gatherings. Athleisure represents a significant collapse of the boundary of high fashion and street fashion. Urban- tech wear is light and enables modern people to perform garment and gear functions simultaneously, making storage useful using various technical devices by elevating activity and functionality. Urban outdoor fashion holding functionality and adding modern fashion in appearance has appeared.

• 정보보호학회논문지
• /
• 제16권4호
• /
• pp.119-126
• /
• 2006

최근 전자투표 시스템에 대한 투표자의 신뢰성을 높이기 위하여, 투표자가 자신의 투표 결과를 확신할 수 있도록 하는 영수증 발급 기술에 대한 연구가 활발히 진행되고 있다. 전자투표 영수증은 투표소 밖에서도 검증할 수 있어야 하기 때문에 개별 검증성과 함께 매표방지에 대한 요구사항을 만족해야 한다. 기존의 연구에서는 특수한 용지와 프린터를 필요로 하거나 투표기가 올바로 작동하는 것을 수시로 검증해야 하는 관리상의 문제점을 가지고 있었다. 본 논문에서는 전자투표에 대한 신뢰성을 높이면서, 특수한 종이나 프린터 또는 스캐너가 필요 없고 투표소 내의 기기나 관리자를 신뢰하지 않아도 되는 영수증 발급 방식을 제안한다.

• Journal of the Korean Wood Science and Technology
• /
• 제44권1호
• /
• pp.135-146
• /
• 2016

국내에서는 열기계펄프 생산을 국내산 소나무(Pinus densiflora)만을 사용하고 있다. 가격적 측면에서 장점이 있지만 지속적인 수급이나 피치와 같은 문제점이 내재되어 있기 때문에 주원료를 대체할 수 있는 방안이 강구되어야 한다. 열기계펄프의 원료로서 국내산 소나무를 대체할 수 있는 수종으로 러시아산 가문비(Picea jezoensis), 러시아산 낙엽송(Larix leptolepis), 그리고 미얀마산 대나무(Phyllostachys bambusoides)를 선정하여 열기계펄프 특성을 분석하였다. 이들 원료들은 동일한 조건 하에서 열기계펄프로 제조되었다. 러시아산 낙엽송과 미얀마산 대나무는 펄프화 공정에 부정적인 영향을 미칠 수 있는 추출물 함량이 과량 검출되었다. 러시아산 가문비는 다른 수종들과는 달리 shive와 피치의 함량이 가장 적게 정량되었고, 리파이닝 에너지도 국내산 소나무에 수준으로 매우 적게 소모되었다. 열기계펄프의 백색도면에서는 가문비가 가장 높은 백색도를 나타내어 표백 약품의 절감에 기여할 수 있을 것으로 기대되었다. 결론적으로 러시아산 가문비가 공정 에너지 절감과 펄프 품질 향상 측면에서 국내산 소나무를 대체할 수 있는 가장 우수한 수종인 것으로 나타났다.