산업용지 현장테스트를 통한 왕겨 유기충전제 최적 사양 탐색

이지영(Ji Young Lee),김영훈(Young Hun Kim),김철환(Chul Hwan Kim),성용주(Yong Joo Sung),위상욱(Sang Wook Wi),박종혜(Jong-Hea Park),김은혜(Eun Hea Kim) 한국펄프·종이공학회 2015 펄프.종이기술 Vol.47 No.4

In the previous study, we investigated the physical properties of new organic fillers made from major agricultural byproducts, including rice husks, peanut husks and garlic stems, and we estimated that rice husk was the best candidate for use as new organic fillers in paperboard. In this study, an organic filler prototype was produced with rice husk and the mill trials were carried out in a white liner chipboard (duplexboard) mill. The rice husk organic filler was added to the middle ply of SC 350 g/㎡ to determine the optimal conditions for the manufacture of rice husk organic fillers. The mill trials were performed three times and the bulk improvement and drying energy reduction were measured to identify the functionality of the rice husk organic filler compared to that of the commercial wood powder. In the first mill trial, the test failed because the surface roughness of the duplexboard had deteriorated after the rice husk organic filler was added to the OCC stock. As all of the particles remaining on the 60 mesh sieves were removed and the particle size was decreased by increasing the length of the grinding process, the surface roughness of the duplexboard did not be deteriorated in the second mill trial. However, the bulk improvement and drying energy reduction were not observed. In the final mill trial, as the particle size of the rice husk organic filler was controlled by increasing the portion of particles passing through the 60 mesh sieves and remaining 100 mesh sieves, higher bulk improvement and drying energy reduction were acquired compared to the commercial wood powder.

판지의 강도 향상을 위한 신규 유기충전제 개발

이지영,김철환,박종혜,김은혜,윤경태 한국펄프·종이공학회 2015 펄프.종이技術 Vol.45 No.3

Wood powder is widely used in paperboard mills to increase bulk and reduce drying-energy consumption, but this material also deteriorates paper strength because it interferes with the bonds between fibers. Although there have been many studies done to improve the strength of paperboard containing wood powder, specific applications have not recently been observed in paperboard mills. In this study, we carried out a new approach for improving paperboard strength by developing a new organic filler with the ability to increase the bonds between fibers. The residue of tapioca starch was used as raw material to manufacture an organic filler. The functionalities, including bulk and strength, were evaluated by making handsheets containing either wood powder or tapioca organic filler, or a mixture of the two, and measuring their physical properties. The organic filler showed lower bulk improvement and higher paperboard strength than the wood powder. The mixture of tapioca organic filler and wood powder showed improved paperboard strength compared to wood powder alone. Therefore, tapioca residue can be used as a raw material to manufacture an organic filler for paperboard mills.

제지공정의 유기 충전제로서 침엽수 잎 분말 적용

성용주,이지영,김동성,서영범,임창국,권완오,김진두 한국펄프·종이공학회 2014 펄프.종이技術 Vol.34 No.4

The application of conifer leave to the papermaking process as a functional organic filler was investigatedin this study. The powder of the conifer leave after hot water extraction for the functional extract, suchas phytoncide, was applied to OCC stock. The comparison between the commercial wood flour and theconifer leave powder as organic filler for OCC paper were conducted with various wet pressingconditions. The amount of the water removal by the wet pressing process and the bulk of handsheet wereincreased by the addition of the wood flour and the conifer leave powder, although the tensile strengthwas decreased. At the higher pressure condition of the wet pressing, the wet pressing efficiency wasgreatly increased by the wood flour and the conifer leave powder. There was a little difference in the performanceof the wood flour and the conifer leave powder as an organic filler. Those results showed theconifer leave powder could be an alternative resource to the wood powder for papermaking organic filler.

오일팜 부산물을 이용한 유기충전제 제조 가능성 평가

이지영,김철환,성용주,박종혜,김은혜 한국펄프·종이공학회 2015 펄프.종이技術 Vol.45 No.3

As the production of palm oil has been increased, the generation of oil palm biomass is also increased and the utilization of the oil palm biomass become more significant topic. One third of the oil palm biomass is empty fruit bunch (EFB) and the other two thirds are oil palm trunks and fronds. However, the effective use of oil palm biomass has not been developed and most of it is discarded near oil palm plants. In this study, we investigated the applicability of EFB to the paperboard mills, as an organic filler. The new organic filler was manufactured in a laboratory by grinding and fractionating dried EFB powder, and its properties were analyzed. The particles of EFB organic filler were larger and more spherical than those of the commercial wood powder. The use of EFB organic filler resulted in a higher bulk of the handsheets with similar trends of physical strength, compared to those made with wood powder. It was concluded that EFB could be used as a raw material to manufacture organic filler for paperboard production.

판지의 강도 향상을 위한 신규 유기충전제 개발

이지영(Ji Young Lee),김철환(Chul Hwan Kim),박종혜(Jong Hye Park),김은혜(Eun Hea Kim),윤경태(Kyeong Tae Yun) 한국펄프·종이공학회 2015 펄프.종이기술 Vol.47 No.5

Wood powder is widely used in paperboard mills to increase bulk and reduce drying-energy consumption, but this material also deteriorates paper strength because it interferes with the bonds between fibers. Although there have been many studies done to improve the strength of paperboard containing wood powder, specific applications have not recently been observed in paperboard mills. In this study, we carried out a new approach for improving paperboard strength by developing a new organic filler with the ability to increase the bonds between fibers. The residue of tapioca starch was used as raw material to manufacture an organic filler. The functionalities, including bulk and strength, were evaluated by making handsheets containing either wood powder or tapioca organic filler, or a mixture of the two, and measuring their physical properties. The organic filler showed lower bulk improvement and higher paperboard strength than the wood powder. The mixture of tapioca organic filler and wood powder showed improved paperboard strength compared to wood powder alone. Therefore, tapioca residue can be used as a raw material to manufacture an organic filler for paperboard mills.

오일팜 부산물을 이용한 유기충전제 제조 가능성 평가

이지영(Ji Young Lee),김철환(Chul Hwan Kim),성용주(Yong Joo Sung),박종혜(Jong-Hea Park),김은혜(Eun Hea Kim) 한국펄프·종이공학회 2015 펄프.종이기술 Vol.47 No.5

As the production of palm oil has been increased, the generation of oil palm biomass is also increased and the utilization of the oil palm biomass become more significant topic. One third of the oil palm biomass is empty fruit bunch (EFB) and the other two thirds are oil palm trunks and fronds. However, the effective use of oil palm biomass has not been developed and most of it is discarded near oil palm plants. In this study, we investigated the applicability of EFB to the paperboard mills, as an organic filler. The new organic filler was manufactured in a laboratory by grinding and fractionating dried EFB powder, and its properties were analyzed. The particles of EFB organic filler were larger and more spherical than those of the commercial wood powder. The use of EFB organic filler resulted in a higher bulk of the handsheets with similar trends of physical strength, compared to those made with wood powder. It was concluded that EFB could be used as a raw material to manufacture organic filler for paperboard production.

다이나모메터에 의한 자동차용 디스크 브레이크 패드의 성능평가

장성규 동의공업대학 2000 論文集 Vol.26 No.1

In the paper, it were studied in changing of effectiveness and appraising safety using dual brake dynamometer that the efficiency of brass solid lubricants, known as factors which effect ventilated disc brake performance mostly on wear and friction characteristics of friction materials, with a variety of metal powder meshes and organic fillers. The results in the work are following. 1) Effectiveness is higher in proportion to amount of Hi-car. 2) Small mesh is more excellent in brake safety than big one. 3) Fade efficiency has relation to not solid lubricant mesh but the existence of organic friction material.

다층판지의 벌크 향상을 위한 농업부산물로 제조된 유기충전제 적용

이형규,김형진 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0

종이는 두께에 따라 종이와 판지로 분류될 수 있으며, 제지공정의 원료로서 화학펄프와 순자제지자원 및 다양한 유, 무기 첨가제가 사용된다. 하지만 세계적으로 환경적 문제가 제기됨에 따라 목질계 자원의 사용을 절감하기 위한 많은 기술이 연구 및 개발되고 있다. 따라서 본 연구에서는 목질계 자원의 소비를 절감하기 위한 연구의 일환으로서 다층판지의 벌크를 향상시키고자 하였다. 이를 위해 농업부산물인 왕겨, 볏짚 그리고 MDF를 분쇄하여 유기충전제로 filler-layer에 적용하였으며, 유기충전제의 종류 및 첨가량에 따른 물성변화를 분석하였다.

지력증강제 투입에 따른 농업부산물 유기충전제 적용 판지의 물성 평가

이지영(Ji Young Lee),조해민(Hae Min Jo),박태웅(Tae Ung Park),김경민(Kyung Min Kim),김철환(Chul Hwan Kim) 한국펄프·종이공학회 2018 펄프.종이기술 Vol.50 No.4

In this study, the effect of dry strength agents on the physical properties of sheets containing organic filler made from rice husk (RH) was investigated. KOCC was used to make handsheets containing RH and empty fruit bunch (EFB), and the bulk and strength of the sheets were analyzed. To determine the effect of dry strength agents on paper strength, handsheets containing 9% RH organic filler were made by adding cationic polyacrylamide (C-PAM) and amphoteric polyacrylamide (Am-PAM) and their strengths were measured. Handsheet bulk increased as the amount of organic filler increased, but a reduction in paper strength was also observed. However, when C-PAM and Am-PAM were added to the stock, the breaking length, compressive strength, burst strength, and stiffness of the handsheets were improved as a function of the level of addition. Significant difference between the performances of C-PAM and Am-PAM was not observed as the level of addition increased from 3% to 9%. Ultimately, it was concluded that the use of dry strength agents could be a solution for the reduction in paper strength when organic fillers are applied.

유기질섬유 계면처리에 따른 유기섬유강화 시멘트복합체의 계면구조특성 및 물성고찰

최응규(Choi Eung-Kyoo) 대한건축학회 2003 大韓建築學會論文集 : 構造系 Vol.19 No.8

The aim of the study is to analyze physical and mechanical properties of cement composite specimens by way of adding varying contents of a selected range of Polyacrylamides(PAMs) as interfacial coupling agent for organic fibers. In line with the aim of the study, mode of failure has also been carefully examined. Based on the experiment, the study attempts to suggest a characteristic of interfacial structure matrix and physical properties of organic fiber-reinforced cement composite. In the experiment, N-PAM(Nonion), C-PAM(Cation) and A-PAM(Anion) were used as interfacial coupling agent for organic fibers such as PVA and acrylics. The experiment has demonstrated A-PAM for PVA fibers and C-PAM for acrylic fibers to be an optimum interfacial coupling agent for the respective organic fibers in terms of both interfacial adhesion and physical properties. When an inappropriate interfacial treatment agent was used, a number of organic fibers were found to have been pulled out and the matrices were found to be loose. It is evident from the experiment that there is an optimal PAM as interface treatment agent for respective organic fibers, producing high degree of compactness of the matrix as well as excellent physical properties including interfacial adhesion. The experiment has demonstrated that when PVA fibers are treated with A-PAM and acrylic fibers with C-PAM, PVA fibers proved to be superior to acrylic fibers in terms of adhesion to cement matrix as well as in terms of physical and mechanical properties.