This study examined the impact of pulping conditions on properties of NSSC pulp from rapeseed residue. Rapeseed residue was collected from the research field in the Babul city that located in north of Iran. The celluloses, lignin, Extractives soluble in alcohol- acetone and ash were measured as 44±0.87%, 19.21±0.58%, 6±0.53% and 13±0.19%, respectively. Fiber length, diameter, lumen and cell wall thickness of rapeseed residue fibers were examined as 0.96±0.18 mm, 24.21±6.07 μ, 15.47±5.23 μ and 4.37±1.97 μ. Three pulping durations of 20, 30 and 40 min and 3 chemical charges of 10%, 15% and 20% chemical charge was used for NSSC paper industry. Cooking temperature at 170°C, Na SO to Na CO ratio of 2.91:1 and liquor to residue ratio of 10:1 were 2 3 2 3 kept constant. The highest yield (82%) was obtained applying the treatment combination of 40 min pulping time and 10% chemical charge and the lowest yield (63.67%) was observed with 30 min pulping time and 15% chemical. After the Pulping, The pulp prepared to be refined up to 400±50 ml CSF and 127 gm-2 hand sheets were prepared. The results of pulping and hand sheet evaluation showed that 20% chemical charge, 30 min pulping at 170 °C can be considered as the optimum pulping condition for rapeseed residues. Corrugating medium test, ring crush test, tensile, tear and burst indices of this pulp were measured as 232 KN mG1, 1.96 KN mG1, 35.56 N.mgG1, 6.19 mN m2gG1 and 2.29 kPa m2gG1, respectively. According to the results of this study, it was found the rapeseed residue is suitable for pulping.
کلید واژگان :Corrugating Medium test % NSSC % Rapeseed % Ring crush test % Strength % Yield
ارزش ریالی : 600000 ریال
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