公开(公告)号：US4674885A

公开(公告)日：1987-06-23

申请号：US688755

申请日：1985-01-04

申请人： Lewis Erwin ,  John Arimond

发明人： Lewis Erwin ,  John Arimond

IPC分类号： B01F3/08 ,  B28C7/04

CPC分类号： B01F3/0803

摘要： Liquids of different viscosity are mixed together more rapidly and with less energy consumption by elongating drops of the more-viscous liquid prior to mixing them into the less-viscous surrounding liquid. The more-viscous drops are elongated past a critical aspect ratio that is a function of the ratio of the viscosities of the two liquids and of the relative volume fractions they occupy. The rate at which the more-viscous drops mix into the surrounding liquid is dependent on the amount of shear strain required to stretch the drops to their critical aspect ratio, and thus, if the drops begin the mixing process already elongated, the rate of mixing is greater. In polymer blending operations, wherein a tumbled mixture of polymer pellets are melted and blended, the more-viscous pellets are elongated in the pelletizing operation. The mixing technique can be applied whenever the more-viscous drops are distributed discontinuously through a mixture, i.e., whenever they do not form a continously connected matrix. This occurs most often when the more-viscous liquid is in the minority, but may occur when it is in the majority.

摘要翻译： 将不同粘度的液体在将它们混合到较粘稠的周围液体中之前，通过延长较粘稠液体的液滴而更快速地并且具有较少的能量消耗混合在一起。 较粘稠的液滴通过临界长宽比伸长，其是两种液体的粘度与其占据的相对体积分数之比的函数。 更粘稠的液滴混合到周围液体中的速率取决于将液滴拉伸至其临界长宽比所需的剪切应变的量，因此，如果液滴开始已经延长的混合过程，混合速率 更伟大。 在聚合物共混操作中，其中聚合物颗粒的翻滚混合物熔融并混合，在造粒操作中更粘稠的颗粒是细长的。 每当粘稠的液滴通过混合物不连续地分布时，即每当它们不形成连续的基质时，混合技术就可以应用。 当更粘稠的液体在少数情况下，这种情况最常发生，但是当大多数情况下可能发生。