Abstract
In this paper, the stiffness and folding endurance of the paper were investigated with three kinds of pulp, such as the mechanical wood pulp, chemical pulp and composite pulp, after using common additives and cleaning additives. The results indicated that the stiffness of the paper can be increased by 20% ~ 30% and folding endurance can improve 20% ~ 60% after using new kind of cleaning additives no matter what kind of filler. New cleaning additives can not only improve the physical properties of paper, but also change "acidic papermaking" of the traditional paper industry into clean neutral papermaking environment. Especially, it is suitable for the production of food card paper.
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