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종이의 기상 그라프트 소수화 처리가 재생지의 물성에 미치는 영향
노규환,신유림,강현지,김한별,류정용 한국펄프·종이공학회 2023 펄프.종이기술 Vol.55 No.2
In this study, Hw-BKP handsheets were prepared and treated with gas grafting to achieve hydrophobicity. The study examined the changes in paper strength and water resistance after repeating the recycling and gas grafting process. However, the gas grafting treatment caused a decrease in the strength of the handsheet, presumably due to deterioration of the handsheet by hydrochloric acid, by-product from grafting. Furthermore, the fatty acid reacted on the surface of the fiber acted as an interfering factor with the hydrogen bonding between the fibers, resulting in a reduction in the strength of the handsheet after recycling. Although the water resistance of the handsheet decreased after its first recycling following gas grafting, the study confirmed that repeating the grafting process twice enhanced the handsheet's water resistance even after recycling. Therefore, recycling the grafted paper and repeating the grafting treatment once more is an effective method of hydrophobization t o m inimize the cellulose f ibers' wetting in water. Although the beating treatment restored the recycled handsheet's absorbency, it did not significantly recover the strength or formation of the recycled paper. .
공정 로스 구조에 의한 가동률지표 모형 연구와 FOM솔루션 데이터 분석 방법
노규환(Kyu Hwan Roh),김수영(Su Young Kim) 한국생산제조학회 2023 한국생산제조학회지 Vol.32 No.1
The aim of this study is to present a new and improved metrics model for measuring the operating rate data based on the loss structure during the manufacturing process and a study on the data analysis methodology. First, the loss structure is classified, analyzed, and presented. Subsequently, the overall equipment effectiveness (OEE) metrics based on the total productive maintenance (TPM) losses are presented and the applicability problem is analyzed. The total production effectiveness (TPE) metrics, which includes both the equipment efficiency and 4M efficiency factors in the calculation of its operating rate new model, is then presented to minimize the problems of OEE. And the man-hour effectiveness (MHE) metrics is presented for measuring the man-hour during manual work with structured man-hour losses. Finally, factory operation management (FOM), which is a solution based on 4M multi-dimension analysis methodology, is applied for the analysis of the operating rate data.