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首页> 外文会议>2003 TAPPI spring technical conference and exhibit >THE EFFECT OF THICKENERS ON COATING SUSPENSION RHEOLOGY AND FINAL COATING STRUCTURE
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THE EFFECT OF THICKENERS ON COATING SUSPENSION RHEOLOGY AND FINAL COATING STRUCTURE

机译：增稠剂对涂料悬浮流变性和最终涂料结构的影响

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Polymers are added to paper coatings to modify rheology and for water retention. Recent papers have reportedrnconflicting results with regard to the relationship between coating rheology and the final coating structure. The finalrncoating structure is important because it determines the physical, optical, and printing properties. This work focusesrnon expanding the database related to the influence of various polymers on rheology and the final coating structure.rnCoatings with different polymers were characterized in terms of steady shear and viscoelastic properties. Theserncoatings were applied onto paper and plastic film with a laboratory rod coater. The final coating structure afterrndrying was characterized in terms of void fraction, water absorption rate, gloss, and light scattering coefficient.rnA relationship between the elasticity of the suspensions and the final coating structure was found for the associativernthickeners. However, the concentration and molecular weights of cellulosic thickeners did change the wet staternrheology, but not the final coating structure. For all coatings, a correlation is found between shear viscosity andrngloss. These results confirm past work and show that certain types of polymers must be able to preserve the wetrnstate structure during the drying event, but other types do not.
机译：将聚合物添加到纸涂料中以改善流变性和保水性。最近的论文报道了关于涂层流变学和最终涂层结构之间关系的矛盾结果。最终涂层结构很重要，因为它决定了物理，光学和印刷性能。这项工作的重点是扩大与各种聚合物对流变学和最终涂层结构的影响有关的数据库。rn带有不同聚合物的涂层通过稳定的剪切力和粘弹性来表征。用实验室棒式涂布机将这些涂料涂布到纸和塑料薄膜上。干燥后的最终涂层结构通过空隙率，吸水率，光泽度和光散射系数进行表征。发现了缔合型增稠剂的悬浮液弹性与最终涂层结构之间的关系。但是，纤维素增稠剂的浓度和分子量确实改变了湿流变学，但没有改变最终的涂层结构。对于所有涂料，在剪切粘度和熔损之间发现相关性。这些结果证实了过去的工作，并表明某些类型的聚合物必须能够在干燥过程中保持湿态结构，而其他类型则不能。

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