Melt Elasticity/Strength

The melt strength (elasticity) is determined by withdrawing an extruded strand of capillary rheometer or laboratory extruder in ascending and variable speed until it breaks off. As a result, an extrusion take-off speed is achieved which is considerably higher than the exit speed of the extruded strand.

The melt elongation value corresponds to the measured force of the extruded melt.


GÖTTFERT offers two different systems for measuring melt elasticity, the Haul-Off or the Rheotens.

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