The aim of this research was to investigate the properties of Neutral sulfite semi-chemical (NSSC) pulping of bagasse. Depithed bagasse (wet method) was prepared from Pars Pulp and Paper Mill which is located in Khuzestan province of Iran. Two pulping durations of 30, and 40 min and 2 chemical charges of 10%, and 20% were used. Fixed Cooking temperature of 170 °C, Na2SO3 to Na2CO3 ratio of 2.77:1 and cooking liquor to bagasse ratio of 10:1 were used. The highest yield (84.41%) was obtained applying the treatment combination of 30 min pulping time and 10% chemicals charge and the lowest yield (72.76%) was observed with the 40 min pulping time and 20% chemicals. After the consideration of the pulp, the pulps were refined up to 410±25 ml CSF by using PFI Mill refiner. Then, 127 g m-2 handsheets were made from different samples of pulps and the strength properties of handsheets were measured. For measuring the strength properties of handsheets, the TAPPI standard methods were used. The results showed that, when the yield decreased, with the exception of tear strength, the strength indices of paper such as ring crush test (RCT), stiffness, tensile strength, burst strength, and breaking length were increased. The cause of tear strength reduction is ascribed to refining.
کلید واژگان :Bagasse, Neutral Sulfite Semi chemical pulping, strength indices, Ring Crush Test, Stiffness.
ارزش ریالی : 300000 ریال
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