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实验对沉积在机械浆丝状细小纤维、片状细小纤维以及长纤维上的高岭土进行了研究,以探讨机械浆细小组分对填料留着的影响。结果表明:当浆料中加入高分子絮凝剂时,留着在浆料中不同组分上的高岭土量有显著的差异;阳离子聚丙烯酰胺(CPAM)能促进填料沉积在细小纤维上,尤其是丝状细小纤维;聚环氧乙烷(PEO)虽然只能稍微地提高高岭土的留着率,但随着其用量的增加,它能很好地分散高岭土并沉积在纤维上,这种效果对细小组分尤为显著;同时,PEO能使浆料悬浮液的细小组分释放出以纤维束或缠结纤维形式存在的细小粒子。实验还通过高岭土的留着和过滤实验比较了留着机理与过滤机理。结果表明:高岭土在滤饼上的物理吸附对它的留着有很大的影响;同样地,长纤维由于比细小纤维能更好地形成滤饼而依靠其与填料间的相互作用吸附更多的填料。
Experiments on the deposition of mechanical pulp microfibrils, flake fines and long fibers on the kaolin were studied in order to discuss the mechanical properties of small particles on the filler retention. The results showed that when the polymer flocculant was added to the slurry, there was a significant difference in the amount of kaolin remaining on the different components in the slurry; cationic polyacrylamide (CPAM) could promote the deposition of fillers on the fine fibers, especially Filamentous fine fibers; polyethylene oxide (PEO) although only slightly improve the kaolin retention, but as its dosage increases, it can well disperse the kaolin and deposited on the fiber, the effect of In particular, PEO can release fine particles of fiber slurry or entangled fibers in the tiny components of the slurry suspension. The experiment also compares the retention mechanism and the filtration mechanism by retaining kaolin and filtering experiments. The results show that the physical adsorption of kaolin on the filter cake has a great influence on its retention. Likewise, the long fiber adsorbs more due to its interaction with the filler due to the better formation of the filter cake than the fines Filler.