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논문 기본 정보

자료유형
학술대회자료
저자정보
저널정보
한국펄프·종이공학회 한국펄프·종이공학회 학술발표논문집 한국펄프·종이공학회 2003년 춘계학술발표논문집
발행연도
2003.4
수록면
80 - 92 (13page)

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초록· 키워드

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The water retention of coating colors can be accurately measured by devices such as an AA-GWR water retention meter whose principle of measurement is based on pressure filtration of coatings under an externally applied air pressure over a certain period of time. It was hypothesized that such devices could be also used to determine the immobilization solids (IMS) of coating colors by determining a sudden drop in the rate of dewatering, that is, a sudden change in the drainage curves. To test this hypothesis, the immobilization solids of coating colors containing various thickeners and water retention additives at different levels were first accurately measured by a modified immobilization tester based on the well-known gloss drop method, and then their values were compared with those obtained by an AA-GWR water retention tester. They agreed very well and showed that the mean of the solids differences is 0.36% in the IMS points between both methods. This good agreement was not surprising because both test methods are based on the same end-point, that is, the immobilization solids point at which menisci begin to form at the coating surface. Theoretical considerations supporting this new method for measuring the immobilization solids of coating colors are presented and some recommendations for the test method are discussed. Also, the effect of various thickeners and water retention additives on the properties and printability of coated papers is discussed.

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ABSTRACT

1.서론

2.재료 및 방법

3.결과 및 고찰

4.결론

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