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혼합물 실험계획과 다수 반응변수 최적화를 통한 속경화 초저온접착제 개발 사례
변재현 ( Jai Hyun Byun ),서판석 ( Pan Seok Seo ),신지은 ( Ji Eun Shin ),이륜규 ( Lyun Gyu Lee ),염지현 ( Ji Hyun Yeom ) 한국품질경영학회 2014 품질경영학회지 Vol.42 No.4
Purpose: In this paper we present a case study of developing fast curing adhesives for insulation material of LNG carriers using an extreme vertices design with four mixture components. Three material properties are considered . shear strength, viscosity, and tensile strength. In the optimization experiment, we used hardness instead of tensile strength due to shortage of specimens. Methods: We employ four-factor extreme vertices design with 19 runs and desirability function approach for simultaneously optimizing three responses. After selecting optimal condition of the mixture components, we do confirmation experiments to verify the reproducibility of the optimal condition under manufacturing circumstance. Results: Simultaneous optimal condition for the three responses, that is, shear strength, viscosity, and harness is obtained. At the optimal condition, confirmation experiments are executed in manufacturing circumstance. The variation for the shear strength is not satisfactory, which is due to the variation of the humidity. Conclusion: At the optimal condition three material properties are satisfactory. To reduce the variability for the shear strength, robust design is needed.