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펄프섬유(纖維)의 제지특성(製紙特性)에 미치는 회수처리(回收處理)의 영향(影響)
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  • 펄프섬유(纖維)의 제지특성(製紙特性)에 미치는 회수처리(回收處理)의 영향(影響)
저자명
김형진,조병묵,Kim. Hyoung-Jin,Jo. Byoung-Muk
간행물명
목재공학
권/호정보
1993년|21권 1호|pp.21-38 (18 pages)
발행정보
한국목재공학회
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

In order to investigate the influence of recycling, a laboratory method simulating the papermaking process was used for assessing the effects of recycling on fiber properties. Sw-BKP, Hw-BKP and BGP were disintegrated and beaten to about 42$^{circ}$SR-44$^{circ}$SR by a valley beater. After beating, these pulps were dewatered by centrifuge and dried at 90$^{circ}C$ for 72hrs. This recycling process(sequence of wetting, defiberating, dewatering and drying) was repeated seven times. Physical, mechanical and optical properties of recycled pulps were evaluated by TAPPI Standards. Morphological changes occurred through recycling process was observed by SEM. Sheet density decreased with recycling. The largest drop in density occurred during the first recycling. The porosity values decreased with recycling. Mechanical properties such as tensile, burst strength and folding endurance, decreased with recycling. However tear strength of Sw-BKP and mixtured pulp increased at the first recycling. Optical properties such as brightness, opacity and light scattering coefficient, increased with recycling. However, brightness of mixtured pulp gradually decreased with recycling. Fibrillated outer layer of the fiber was gradually removed from the surface with recycling. As a result of recycling, crinkles on the fiber surface were found to be more folded.