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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

/sq, whereas for electrostatic coating, only small electrical resistivity of ~10 7 –10 8 Ω/sq is necessary [ 3 ]. Therefore, the control of the electrical resistivity in polymers has become a main challenge for the development of conductive polymer composites (CPCs). Muller et al. [ 4 ] and Villmow’s group [ 5 ] demonstrated that the addition of conductive particles to polymers simply makes them conductive. A wide variety of conductive particles are available, such as metal particles, carbon fibers, carbon nanotubes (CNTs), grapheme, etc. Nowadays, the most mature

- porating an anti-electrostatic agent, most commonly on the surface. Therefore, anti-electrostatic surfaces are either manufactured from metal, or covered with an anti- electrostatic coating. Wood is often the preferred building material for con- structing a room or furniture that houses electronic equipment and flammable materials. However, wood must be treated with an anti-electrostatic agent before it can be used in applications requiring anti-electrostatic properties since wood is an electrical insulator and prone to the buildup of electrostatic charge. Graphite is