Output variation 1
Vol. 17 #2, July 1990
Flow variation can be estimated by measuring the pressure variations using the following equation:
dQ (%) = (d P (%)/n)
where n is the power law index of the resin being extruded. Understanding this equation helps one to realize the importance of main taining a uniform head pressure, if constant flow rate is important.
Note: This formula has been corrected from the misprint that occurred in the original newsletter.
See also
Adapter flow
Output variation 2
Melt pressure
Melt pressure indicator