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http://dx.doi.org/10.7584/ktappi.2012.44.1.010

Study on the Thermal Fastness of Fluorescent Whitening Agents  

Kim, Chul-Hwan (Dept. of Forest Products/IALS, Gyeongsang National Univ.)
Lee, Ji-Young (Dept. of Forest Products/IALS, Gyeongsang National Univ.)
Kim, Beong-Ho (Dept. of Forest Products/IALS, Gyeongsang National Univ.)
Choi, Jae-Sung (Dept. of Forest Products/IALS, Gyeongsang National Univ.)
Lim, Gi-Baek (Dept. of Forest Products/IALS, Gyeongsang National Univ.)
Kim, Da-Mi (Dept. of Forest Products/IALS, Gyeongsang National Univ.)
Publication Information
Journal of Korea Technical Association of The Pulp and Paper Industry / v.44, no.1, 2012 , pp. 10-15 More about this Journal
Abstract
Fluorescent whitening agents (FWAs) are used extensively in the paper industry to improve the optical properties. FWAs are neither photochemically nor thermally stable, and thereby the papers containing FWAs can be damaged by external heat. We observed that the CIE whiteness, ISO brightness and fluorescence index of the commercial papers decreased with the thermal treatment and thought that the thermal fastness of FWAs was the main factor affecting the thermal stability of the papers. Thus, the model papers treated with three types of FWAs were manufactured respectively and the thermal stability of FWAs was identified by determining ${\Delta}$ CIE whiteness and ${\Delta}$ fluorescence index.
Keywords
fluorescent whitening agents; thermal fastness; CIE whiteness; ISO brightness; fluorescence index; thermal stability;
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