MICRO-COMPOUNDING:

H Unit: sec.-1. Where: D= Screw Diameter. H= Channel Depth in the Meter. N= Rev./Sec. of the Screw. the 3/4 inch screw would have a shear rate of only 68 sec.-1 at 100 rpm. A 4.5 inch (11.4 mm) diameter extruder screw with a typical thread depth of 0.140 in the metering section and a screw speed of 100 rpm, would have a shear rate of 158 sec.-1. ................
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