Mixing of fluid substances

摘要

A process and apparatus for mixing fluid substances having different viscosities. A flow of a major fluid substance having a higher viscosity is segmented into a plurality of fluid substance streams (86) travelling substantially in parallel in close proximity. A flow of a fluid additive having a lower viscosity is introduced into the flow of the major fluid substance at one or more points (82) between the fluid substance streams to obtain a combined flow. The combined flow is then mixed to provide a homogeneous mixture. The major fluid substance may be an extrudate.