Rheometric Measuring Die Heads

All slot capillary dies are highly polished and have a coating against corrosion and abrasion.

A precise description of the flow processes within polymer processing machines implies exact knowledge of the rheological characteristics of polymer melts, in particular of their viscosity behaviour within a wide, practice-oriented range of shear rates.

The Brabender^® capillary rheometer system, consisting of a laboratory extruder with a suitable drive unit, a rheometric capillary die head, and a high-precision melt pump covers a practice-oriented range of shear rates and allows reliable statements about the material behaviour during different processing stages. The advantages compared to conventional high-pressure capillary rheometers are evident:

• practice-oriented plastification under processing conditions
• continuous operation
• multifunctionality: processing and measuring

The program of measuring die heads is completed by several special measuring die heads:

2- and 3-stage slot capillary die heads
for the determination of shear and elongational viscosity to assess the flow behavior of the melt

Garvey die head (ASTM D 2230)
special measuring die for testing elastomers

Swelltest die head
Channel dimensions [mm]:

Ø 1 * 15 D
Ø 1 * 20 D
Ø 1 * 30 D
Ø 2 * 5 D
Ø 3 * 5 D
Ø 5 * 5 D

for measuring the swelling (visco-elastic) behaviour of extruded round strands - precisely, contact-free, and continuously through laser-scanning