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Furnishing autohydrolyzed poplar weakly alkaline P-RC APMP to make lightweight coated base paper, TAPPI Journal February 2022
ABSTRACT: This work investigated the effects of autohydrolysis pretreatment severity on poplar (Populus tomentosa Carr.) woodchips used to make a type of high-yield pulp (HYP) known as preconditioning followed by refiner chemical treatment, alkaline peroxide mechanical pulp (P-RC APMP). It also investigated the ratios for partially replacing sodium hydroxide (NaOH) with magnesium oxide (MgO) in the high-consistency (HC) retention stage of the P-RC APMP process on the obtained HYP’s properties. The results show that the pretreatment severity of autohydrolysis at combined hydrolysis factor (CHF) = 10.77 and the 50 wt% ratio for partially substituting NaOH with MgO were the optimum conditions for making light-weight coated (LWC) base paper. Compared to the conventional P-RC APMP, the optimized P-RC APMP had similar bulk and higher tensile, burst, and tear indices, as well as opacity, but a slightly lower ISO brightness. When the optimized P-RC APMP and commercial softwood bleached sulfate pulp (SBKP) were blended to make LWC base paper, the most favorable pulp furnish was comprised of 50% optimized P-RC APMP and 50% commercial SBKP. The obtained LWC base paper handsheet had better bulk, and its other properties could also meet the require-ments of LWC base paper.
Magazine articles
Wait till this year?, Solutions!, February 2003, Vol. 86(2) (78KB)
Wait till this year?, Solutions!, February 2003, Vol. 86(2) (78KB)
Magazine articles
Engineered-plastic cooling towers: The latest productivity b
Engineered-plastic cooling towers: The latest productivity booster for pulp and paper operations, Solutions!, Online Exclusives, August 2005, Vol. 88(8)
Magazine articles
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INSIDE THE NUMBERS: Paper Companies Building Fast in Eastern Europe and Russia, Solutions!, December 2005, Vol. 88(12) (36 KB)
Magazine articles
RELIABILITY & MAINTENANCE MANAGEMENT: Can You Truly Justify RCM?, Solutions!, November 2005, Vol. 88(11) (44 KB)
RELIABILITY & MAINTENANCE MANAGEMENT: Can You Truly Justify RCM?, Solutions!, November 2005, Vol. 88(11) (44 KB)
Magazine articles
New alliance formed to combat illegal logging, Solutions!, O
New alliance formed to combat illegal logging, Solutions!, Online Exclusives, May 2005, Vol. 88(5)