MICROWAVE DRYING : EFFECTS ON PAPER PROPERTIES |
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| Authors: | Pawan Kumar Arun S. Mujumdar Zoltan Koran |
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| Affiliation: | 1. Dept. of Chemical Engineering , Mc Gill University , Montreal, 3A 2A7, CANADA;2. Université du Québec a Trois-Rivieres , CP. 500, Trois-Riviéres, Quéebec, G9A 5H7, CANADA |
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| Abstract: | Effects of microwave drying on the mechanical and optical properties of handsheets made from kraft and chemi-thermomechanical pulps were studied experimentally. The quality of paper dried in a microwave field of 2450 MHz is compared with that of paper dried by conventional method under standard conditions. All properties were found to be either enhanced or at the same level as those obtained under standard conditions. Since microwave field allows volumetric heating of moisture, the drying time is much shorter due to reduced resistance to heat and mass transfer within the paper. Furthermore, it is suggested that microwave drying could replace the conventional drying method in the standard testing of pulp and paper samples for quality control purposes. |
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| Keywords: | microwaves microwave drying cylinder drying ring drying Canadian standard freeness physical and optical properties kraft pulp CTMP shrinkage |
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