효소 전처리 BCTMP 시트의 노화 거동 = Aging Behaviors of BCTMP Sheet Pretreated with Enzyme

다국어 초록 (Multilingual Abstract)

It was generally known that the aging treatment of paper is accompanied with the reductions in physical and optical properties of individual fibers and sheet.
In particular, the paper prepared with mechanical pulps occurs the yellowing of sheet, during aging, due to the absorption of light or temperature, and finally has limitation in widely applicable functions of paper.
The aging behaviors of paper can be discussed with three groups of factor. One is considered to external factors, like heat, light and moisture. Another is commented with environmental factors, like oxygen, nitrogen, sulfur, and other air pollutant materials. The other is explained by internal factors, like pulp types, lignin contents, and so on.
In this paper, the aging behaviors of paper prepared with BCTMP were studied in order to know how to affect in physical and optical properties of paper.
For modification of fibers properties, a commercial enzyme was pretreated in the slurry of BCTMP, before handsheet-making. Sheets were aged by accelerated heat treatment. The comparisons were carried out in mechanical strength properties and color reversions. Aging treatments were resulted in higher brightness reductions, in enzyme pretreated paper.