Extrusion of polymer tubing using a rotating mandrel
- 1 December 1976
- journal article
- research article
- Published by Wiley in Polymer Engineering & Science
- Vol. 16 (12) , 827-830
- https://doi.org/10.1002/pen.760161210
Abstract
A rotating mandrel in a tubing die produces multiaxial orientation in the extruded melt. If the polymer melt is quenched rapidly, some multiaxial orientation is retained in the resultant tubing. Multiaxially oriented tubing exhibits reduced crack propagation and some enhancement of yield and fracture strengths. During the processing of multiaxially oriented tubing, relaxation occurs after the melt leaves the die and gives rise to wall thickening and reduction in the lumen of the tubing; the magnitude of these effects is a function of the rate of mandrel rotation.Keywords
This publication has 2 references indexed in Scilit:
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