Abstract
Spiral mandrel dies are widely employed in the processing of polymeric films in the blown extrusion process. The flow dynamics in spiral mandrel dies is modeled in conjunction with a lubrication assumption. The model permits the determination of velocity, rate of deformation, shear stress, and first normal stress difference distributions. It should generate a better understanding of the thermomechanical history experienced by polymeric melts during extrusion in spiral mandrel dies, and should thus facilitate better die design and/or optimization of operating conditions.
Original language | English |
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Pages (from-to) | 179-207 |
Number of pages | 29 |
Journal | Polymer process engineering |
Volume | 5 |
Issue number | 2 |
State | Published - 1987 |