Recycled paper, which is made from dried chemical fibers, has lower strength than paper made from
never dried fibers. By recycling, strength of paper was decreased. Since of drying the fibers, cellulose
gravity, water retention, flexibility and decreasing the accessible surfaces was understandable. Old
methods for increasing the paper strength were included both the dry-strength and refining the
recycled fibers. These methods increase the cost and energy consumption and also fibers shrink
during the refining and produce more fines and will cause problem for drainage and influence paper
production, but dry-strength additives can improve the paper strength. So we will have a review on
the role of chemical additives and confirmation of the mechanisms that control the effects of
papermaking additives on recycled paper.
کلید واژگان :
cellulose gravity, water retention, dry-strength, papermaking.
