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Flow in Capillaries, Slits and Dies

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Melt Rheology and Its Role in Plastics Processing

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Abstract

Pressure driven flow through tubes, slits and other types of channels is of central importance in experimental rheology and in polymer processing. Not only is this flow used as the basis for the most popular type of melt rheometer, but it is also a flow that occurs often in melt processing, for example in an extrusion die or in the runner feeding an injection mold. We will derive the basic equations for flow in tubes and slits and show how these can be used to interpret rheometer data and to design flow systems. The irregular flows that can occur at the entrance and exit of a die are described, and methods for estimating the pressure drop in dies are reviewed.

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Authors and Affiliations

  1. Department of Chemical Engineering, McGill University, Montreal, Canada

    John M. Dealy

  2. Hoechst Celanese Research Division, Summit, New Jersey, USA

    Kurt F. Wissbrun

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  1. John M. Dealy
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© 1999 Kluwer Academic Publishers

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Dealy, J.M., Wissbrun, K.F. (1999). Flow in Capillaries, Slits and Dies. In: Melt Rheology and Its Role in Plastics Processing. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-2163-4_8

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  • DOI: https://doi.org/10.1007/978-94-009-2163-4_8

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-0-7923-5886-2

  • Online ISBN: 978-94-009-2163-4

  • eBook Packages: Springer Book Archive

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