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Direct electrostatic coating of paper Robert H. Marchessault, Patrice Rioux and Ilie Saracovan, Keywords: Coated papers, Polyolefins, Poly-P-hydroxyal- kanoates, Electrostatic coating, Corona discharge, Xerogra- phy, Toners, Adhesive strength, Barrier properties, Moisture transmission. SUMMARY: Direct Electrostatic Coating (DEC) of paper uses "as polymerized" reactor polyolefin and an electrostatic spraying applicator. A glossyltransparent polymer coat was obtained after hot-pressing the electrostatically deposited pow- der layer on the paper surface

. Chemical composition of coated 1 : 105 paper surfaces determined by means of ESCA Interactions between dissolved and 1:226 colloidal substances and a cationic fixing agent in mechanical pulp suspensions Sundberg, A. Ekman, R. Holmbom, B. Sundberg, K. Thornton, J. Marchessault, R.H.Direct electrostatic coating of 1:211 Rioux, P. paper Saracovan, I. Sundstrom, L. Fibrillation and its importance for 4:379 Middleton, S. R. Partial umen loading 1 :204 Scallan, A. M. Brolin, A. the properties of mechanical pulp Hartler, N. fiber sheet Neimo, L

, especial- ly barrier properties and printability. Conclusions The feasibility of the Direct Electrostatic Coating (DEC) process using thermoplastic polymer powders has been demonstrated. Two key-elements enable this new approach: simple and efficient corona charging equipment to provide a high volume throughput of coating material; inexpensive polymer powder (e.g. "as polymerized" polyolefin) with suitable characteristics (i.e., particle diameter, electrostatic charging characteristics, rnelt- ing point, etc.). These results open new approaches to speciality