Static Die Swell/Sag by Laser Micrometry
Test ID
R-032
Description
This test is performed on a capillary rheometer with a laser micrometer mounted directly under the capillary die to determine the increase in extrudate diameter. Extrudate is forced through a give length of 1 mm diameter die at a single shear rate and temperature while measuring the diameter of the extrudate. Extrudate is cut prior to entering the laser micrometer and allowed to continue to flow until reaching the base of the rheometer.
Options
Multiple temperatures and die configurations can be ordered to determine the effect of test conditions on sag.
Standards
- ASTM D3835
Data
Die Swell Ratio v. Shear Rate. This data appears in Matereality as Capillary Viscosity.
Replicates
Number of times this test is repeated: 5
Samples
2 kg of pellets [details]
Application
This test is useful for determining the thinning of a material in molten state while sagging under its own weight.
