[논문]합성목재의 난연성 확보를 위한 혼합물 실험계획 사례

서호진; 권민서; 이건명; 주혜진; 변재현

doi:10.7469/jksqm.2022.50.1.169

Abstract ▼ AI-Helper

Purpose: This paper addresses a case study of developing a flame retardant wood-plastic composites (WPC) by adding tannic acid to the existing synthetic wood. The optimal mixing ratios of six components are explored to minimize the burning time using two mixture designs. Methods: In the preliminary ...

Purpose: This paper addresses a case study of developing a flame retardant wood-plastic composites (WPC) by adding tannic acid to the existing synthetic wood. The optimal mixing ratios of six components are explored to minimize the burning time using two mixture designs. Methods: In the preliminary experiment, six components are considered to find important components and their ranges. Seven D-optimal mixture design points are generated. Two points are removed for the balance of plastic components to be maintained, and the remaining five points are augmented with two basic compositions. Four components are selected to be considered in the main experiment. In the main experiment, pellets are extruded at the eight mixture design points. In-house testing of burning time is executed three times. Specimens made of pellets from two promising flame retardant compositions are sent to the accredited laboratories and tested. Results: The test results are as follows: 1) The best composition (Wood flour, Tannic acid, PE, Lubricant) = (25, 41, 10, 2) (wt%) shows the burning time of 1 second, which is 9-fold improvement compared to the the burning time of 9 seconds from the existing composition (58, 0, 10, 2) (wt%). 2) The second best composition (41, 25, 10, 2) (wt%) results in the burning time of 2 seconds. This composition is inferior to the best composition in terms of the flame retardancy, but more economical since it needs less tannic acid which is 100-fold expensive than the wood flour. Conclusion: Flame retardant compositions are found by adding tannic acid to the existing WPC employing optimal mixture designs. This case study will be helpful to practitioners who try to develop new products with additional physical properties with as small number of experimental trials as possible. Future research direction includes exploring conditions which satisfy both performance level and cost limitation simultaneously.

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표/그림 (17)

그림 Figure 1. Conical Twin Screw
그림 Figure 2. Hot Press
그림 Figure 3. Extreme vertices design for illustration
표 Table 1. Preliminary mixture design matrix
표 Table 2. Extreme vertices design matrix for illustration
표 Table 3. Optimal mixture design matrix for illustration – type 1
표 Table 4. Optimal mixture design matrix for illustration – type 2
그림 Figure 4. Pellet extrusion from the extruder
표 Table 5. Revised preliminary mixture design matrix
그림 Figure 5. In-house flammability test
표 Table 6. Mixture design matrix and the first burning time test result
그림 Figure 6.1 Pellet without crack
그림 Figure 6.2 Pellet with crack
표 Table 7. Mixture design matrix and the second burning time test result
그림 Figure 7. Comparison of mean and range of burning times
표 Table 8. Mixture design matrix and the third burning time test result
표 Table 9. Test result by accredited laboratories

참고문헌 (15)

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상세보기
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원문보기 상세보기
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원문보기 상세보기
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원문보기 상세보기
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상세보기
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상세보기
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합성목재의 난연성 확보를 위한 혼합물 실험계획 사례
A Case Study of Applying Mixture Experimental Design to Enhance Flame Retardancy of Wood-Plastic Composites 원문보기

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합성목재의 난연성 확보를 위한 혼합물 실험계획 사례 A Case Study of Applying Mixture Experimental Design to Enhance Flame Retardancy of Wood-Plastic Composites 원문보기

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합성목재의 난연성 확보를 위한 혼합물 실험계획 사례
A Case Study of Applying Mixture Experimental Design to Enhance Flame Retardancy of Wood-Plastic Composites 원문보기

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