Title: Effect of pre-straining of paper sheet on its sizing efficiency.
Abstract:The sizing efficiency of pre-strained papers were measured by Stockigt and Cobb sizing test methods. It was found that the sizing efficiency of acidic-sized papers decreases with straining of sheet, w...The sizing efficiency of pre-strained papers were measured by Stockigt and Cobb sizing test methods. It was found that the sizing efficiency of acidic-sized papers decreases with straining of sheet, while that of alkaline-sized papers exhibits a reverse tendency. Straining level also affects sizing efficiency. However, all these changes are within 10% of the sizing degree of the unstrained paper. Effect of the factors being affected by straining, such as paper thickness and porous structure, were studied on the basis of Lucas-Washburn equation. Analysis shows that the differences between alkaline- and acidic-sized papers could be interpreted in terms of the bonding forces between pulp fibers and sizing agents, and the uniformity of distribution of the sizing agents on the fiber surfaces.Read More