تعیین خواص کاربردی چوب توسکای قشلاقی

In this investigation, physical, chemical, fiber dimensions, pulp and papermaking characteristics of 4 years old Alnus glutinosa was researched. The average of oven dry and critical density, fiber length, fiber diameter, lumen diameter and cen wan thickness were measured at 0.396, 0.368, 0.875mm, 32.66um, 27.28 um and 2.70 urn respectively. Chemical composition were obtained 48.5% cellulose, 25.35% lignin, 0.31% ash and 2.36% extractives. CMP, one stage APMP and two stage APMP processes were used for cooking. After pre~irninary cooking, cooking temperature, cooking time, NaOH and H202 charges were applied at 9S degree of centigrade, 10,20, 30 and 40 minutes 10%, 3% respectively. In CMP process, the average of yield, burst index, breaking iength, tear index opacity and brightness were obtained at %73.72-%82.57, Kpa m2/gr. 1.53, Km 3.81, mNm2/gr 3.34, %99.59 and %29.35 respectively. In one stage APMP process, the average of yield, burst index, breaking length, tear index opacity and brightness were obtained at %74.09-%81.57, Kpa m2/gr. 1.52, KIn 3.5, mNm2/gr.2, %99.80 and %28.21 respectively In two stage APMP process, the average of yield, burst index, breaking length, tear index opacity and brightness were obtained at %73.99-%80.89, Kpa m2/gr. 1.92, Km 3.95, mNm2/gr 3.45, %99.85 and %32.41 respectively Among yields of pulp in the three methods, there weren't significant difference at level 5%. In two stages APMP paper, the burst index, breaking length and brightness were more than other and changes of cooking methods hadn't significant differences at level 5% on tear.In ex. l Key words: Alnus glutiYlosa, APMP Process, CMP Process, Short rotation period, Yield, Opacity.

کلیدواژه ها:

توسکای قشلاقی ، خواص چوب ، روش ‭CMP ، ‬روش ‭APMP ، ‬برداشت کوتاه مدت ، جرم خشک ، طول الیاف ، قطر الیاف ، قطر حفره سلولی ، ضخامت دیواره سلولی ، سلولز ، لیگنین ، خاکستر ، خمیر کاغذ ، جرم بحرانی ، کدری ، خمیر کاغذ مکانیکی‭(CMP)‬