a) Dies: D=2 mm; L/D=4 and 16
b) For Q=3.6 kg/h, pressure drops of 7.1 and 17.9 MPa were obtained for the short and long dies, respectively.
c) For Q=1.8 kg/h, pressure drops of 4.8 and 13.5 MPa were obtained for the short and long dies, respectively.
1. A company wants to extrude LDPE rods of 12.70 mm diameter, at 160 ºC and mass flow rate of 180 kg/h. With the aim of finding the viscosity of the material under these operating conditions, capillary rheometry tests were performed under the following conditions:
Calculate the shear viscosity of the material under the real operating conditions, assuming a density of 900 kg/m3