일반적으로 종이 도공의 바인더로 사용되는 라텍스는 입자경이 작을수록 도공층이 부동화 되기 전에 도공층 내에서 원지 혹은 도공층 표면으로의 이동 특성이 강해져서 최종 도공지의 인쇄적성에 다양한 품질의 변화를 보일 수 있다. 라텍스는 원지와 접촉하는 순간부터 원지의 특성에 따라 원지 방향으로 1차 마이그레이션이 일어나고 건조공정의 건조조건(IR-Infra Red 혹은 Hot Air Dryer)에 따라 도공층 표면으로의 2차 마이그레이션이 일어나며 이로 인해 도공층 내에서 Z-방향으로 바인더 분포가 불균일하게 분포하게 됨으로서 인쇄 모틀 현상에도 영향을 미치게 된다. 따라서 본 논문에서는 도공액의 농도와 라텍스의 입자경 그리고 건조조건에 따른 도공층의 구조변화가 최종인쇄적성에 미치는 상관성을 검토하였다.

재생 신문지 생산공정의 탈묵처리는 공정의 pH에 따라 그 수율이 달라진다. 기존의 알칼리 탈묵처리 조건으로부터 의사 중성 혹은 중성으로 pH가 중화됨에 따라 과도한 탈묵 리젝트가 발생하고 수율이 저하되는 문제점이 있다. 본 연구에서는 탈묵 pH에 따른 수율 변화를 실험실 평가를 바탕으로 분석하고 리젝트를 절감하는 방안을 탐색하여 수율을 최적화하고자 하였다.

Properties of newly developed paper from Red Algae Pulp (RAP) were examined. The paper samples were prepared by mixing RAP fiber with wood fibers, HwBKP and SwBKP, to form a paper with $60g/m^2$ in weight. It was prepared in three to four different levels of refining degree and pressure so that it can reveal different bulk level in order to clearly compare the opacity at equivalent bulk for each furnish compositions. Printability of RAP fiber revealed superior effect on print through repression and initial ink absorption. Those properties are expected to improve further if printability improvement effect due to smoothness improvement is added.

The bleached red algae fiber(BRAF) showed very similar crystallinity to the cellulose, furthermore, it has higher thermal decomposition temperature than that of the microcrystalline cellulose(MCC). Polypropylene biocomposites reinforced with BRAF have been fabricated with various BRAF contents by compression molding method and their mechanical and thermomechanical properties have been studied. The mechanical strength as tensile, impact and flexural modulus of BRAF/PP biocomposites were gradually improved with increasing the BRAF content, and thermal property which against the thermal expansion was markdly improved, especially. These results are compared with chopped non-woody fibers as Henequen or Kenaf, BRAF was more effective for fabrication of biocomposites reinforced small-sized fibers. The red algae fiber reinforced biocomposites has the applicability such as electronics, biodegradable products and small-structure composites.

In this study, as a fuel filter for automobiles, base paper which can filtrate the polluted particles must satisfy with the standards of each vehicle. and a filter of impregnation paper made that combining the base paper with the resin. Therefore, They were wanted to found out the factors that affect base paper and impregnation paper according to content of HPZ, Mulberry pulp(MP), Laub holze bleached kraft pulp(LBKP). The most important things we wanted to find out in base paper and impregnation paper test were weight, thickness, air permeability, burst and tensile strength, maximum pore size and mean pore size, stiffness. we wanted to measure a rate of change of these condition by adjusting a rate of mixing for HPZ, MP and LBKP. Moreover, It suited for an impregnation paper mixed with a rate of mulberry pulp 20%, HPZ 40% and LBKP 40%. Used resins in this study was Phenol, Acryl, PVAc. And as every resins, sample was divided into existence and nothing of embossing. as a fuel filter for automobiles, It was appeared that the suitable condition of base paper was a rate of mixing for HPZ(40%), MP(20%) and LBKP(40%).

The chemical composition and thermal, crystal characterization of oak mushroom waste were investigated in comparison with those normal oak wood for utilization of cellulose from oak mushroom waste. The oak mushroom waste contained a higher percentage of ash, and hot water extractives than oak wood. This results indicated that the materials inside the body are easily decomposed during the oak mushroom cultivation. The lower percentage of holocellulose and a-cellulose of oak mushroom waste caused by fungal decomposition too. Whereas, the thermal decomposition behavior and crystallinity of oak mushroom waste was similar to that of normal oak wood, which indicated that the cellulose characterization of oak mushroom waste is resistant to fungal decomposition. In additionally, a degree of polymerization of oak mushroom waste must be investigate for examination of cellulose crystalline characterization, especially.

The aim of this study was to estimate adverse effect on compression strength of corrugated fiberboard containers due to vibration during distribution process. Distribution environment such as road conditions and compression strength of corrugated fiberboard containers for selected agricultural products were studied. We found that increasing humidity does not effect significantly on natural frequencies of boxes, but results in accelerative effect to decrease compression strength of boxes. Box structures and product types also effect on loss of compression strength greatly.