Fluff pulp
A fluff pulp and range technology, applied in the field of fluff pulp, can solve the problem of less resources
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Embodiment 1
[0038] Collected from the production scale pulp digester immediately after (“unbleached”), after the subsequent oxygen delignification step (“oxygen delignified”) and after the bleaching step (“bleached”) Kraft pulp samples. Thus, the "bleached" samples have been subjected to both oxygen delignification and bleaching.
[0039] Each slurry sample was rinsed thoroughly with water, centrifuged, pelleted and stored in a refrigerator prior to analysis.
[0040] Laboratory sheets are formed from various types of pulp. The laboratory sheets were defibrated using a laboratory hammer mill (Kamas H01).
[0041] Tested for chemicals and fluff properties according to standard test methods. The results obtained are illustrated in Table 1. Kappa values are measured on the formed dry sheet. ISO brightness is measured on the formed dry sheet. Specific volume, absorption time and absorption capacity are measured on the fluffed material (ie after defibration). Sheet and pulp properties w...
Embodiment 2
[0046] Kraft pulp samples were collected immediately after the subsequent oxygen delignification step at production scale ("oxygen delignified") and after the bleaching step ("bleached"). Thus, the "bleached" samples have been subjected to both oxygen delignification and bleaching.
[0047] Subsequently, the pulp was centrifuged, pelletized and stored in dark plastic bags at 25 to 30% dry content in the refrigerator. The slurry for a sheet is soaked and wet disintegrated. The slurry suspension pH was adjusted to 5.8, agitated for 10 minutes, and then dewatered in a sheet former. Al 2 (SO 4 ) 3 The solution was treated and its pH was then adjusted to 5.8 with NaOH.
[0048] The wet sheet was pressed and dried to a moisture content of <7%.
[0049] Tested for chemicals and fluff properties according to standard test methods. The results obtained are illustrated in Table 1. Kappa values are measured on the formed dry sheet. ISO brightness is measured on the formed dry ...
Embodiment 3
[0054] Production trials were carried out on a kraft fiber line with a dryer for fluff pulp. The kraft pulp was oxygen delignified and either bleached or unbleached. The pulp has a Kappa value between 8 and 11 measured on-line after oxygen delignification. A bleached control fluff pulp was produced on the same fiber line, but this pulp was bleached to a Kappa value of 1 in the bleaching plant.
[0055] At the drying machine, the slurry of test point 2 and test point 3 was treated with Al 2 (SO 4 ) 3 Treated and pH adjusted with NaOH.
[0056] Fluff properties were tested according to standard test methods. The results obtained are illustrated in Table 1. ISO brightness is measured on fluff pulp. Nodule content, specific volume, absorption time and absorbent capacity are measured on the fluffed material (ie after defibration). Sheet and pulp properties were evaluated according to ISO 187 in a controlled environment.
[0057] Table 3. Chemical and Fluff Properties
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