Extrusion nozzle for polymers
AssigneeBayer MaterialScience AG
InventorsMartin Luedeke, Rainer Mellis, Jens Hepperle, Reiner Rudolf
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Abstract
The invention relates to an improved die for the extrusion of melt strands of viscoelastic masses, and in particular to polymers and mixtures of polymers with other substances (such as solids, liquids or other polymers), where the use thereof avoids the formation of deposits in the region of the die.
Claims15
-14. (canceled)
A die for the melt-extrusion of viscoelastic masses, the die comprising a flow channel having a divergent melt-outflow region, wherein the length, L-out, of which is greater than the length, L-in, of a convergent melt-inflow region, and the ratio L-out/L-in is from 1.1 to 15.
A process for the extrusion of a polymer melt to give polymer-melt strands, comprising extruding the polymer melt using a die as claimed in claim.
Dependencies are inferred from the claim text.