Hamidreza Rudi - Department of Cellulose and Paper Technology, Faculty of New Technologies and Energy Engineering, Shahid Beheshti University, Zirab Campus, Mazandaran, Iran.
Yahya Hamzeh - Department of Wood and Paper Science and Technology, Faculty of Natural Resources, University of Tehran, P.O. Box 31585-4314,Karaj, Iran.
Hossein KERMANIAN - Department of Cellulose and Paper Technology, Faculty of New Technologies and Energy Engineering, Shahid Beheshti University, Zirab Campus, Mazandaran, Iran.

The fibers prepared, Old Corrugated Container (OCC), was consecutively treated by polyelectrolyte multi-layer (PEM) of cationic starch (CS) and anionic starch (AS). Hand sheets (60 g/m2) were made from treated fibers and their characteristics were evaluated. The results showed that anionic layer decreases the bonding ability between fibers, but cationic layer induces adjacent layers to diffuse each other contributes higher adhesion between fibers and more strength in formed papers. In addition, successive layering of CS/AS provides more electrostatic adsorption of CS on the recycled fibers resulting in modifying the electrochemical properties without deterioration of fiber structure. In CS/AS multilayer systems, unlike for refining, paper strength has dramatically increased without significantly increase in density. This result indicated that there is a promising possibility to modify the surface properties of OCC fibers via CS/AS multilayer possessing acceptable output as beating treatment for improvement of fiber bonding and strength properties

OCC - Refining - PEM - Cationic Starch - Anionic Starch