Extruder Processing

Comparison of Single- and Twin-Screw Extruders for Optimal Solids Conveying, Melting, and Mixing
Copyright: September 2022
ISBN: 9781569908631
Hardcover: 220 pages
$129.99 (US)

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Show details for Extruder Processing (eBook)
Extruder Processing (eBook)
Gregory A. Campbell
September 2022


Equipment Overview

Material Properties

Basic Design and Polymer Flow Comparison

Solids Conveying


Fluid Flow and Dissipation

Melt Homogenization


Single-screw or twin-screw extruder? When the need to produce a homogeneous polymer melt occurs in the industrial environment, both product attributes and equipment cost must be evaluated. For many applications both the single and twin-screw extruder will produce the desired homogeneous melt needed to form the product through an extrusion die. Some applications such as dispersive mixing of solids in a polymer matrix are best accomplished in a twin-screw extruder. On the other hand, applications involving chemical reactions, color concentrate distributive mixing, and in line polymer-polymer distributive mixing can be accomplished with either device.

However, for the same production rate, twin-screw extruders are generally more expensive than single-screw extruders with a diameter less than 200 mm. Therefore, a thorough understanding is needed for the concepts of solids conveying, melting, and mixing for the two types of extruders to make appropriate process acquisition decisions. This book covers engineering and technology concepts that should aid the practitioner in comparing these two types of extrusion equipment relative to process requirements.

Author Info:

Gregory A. Campbell

Gregory A. Campbell is Professor Emeritus at Clarkson University, NY. He formerly directed a research group at GM Research and managed polymer fabrication at Mobil Chemical Research.

  • Treasurer and Vice President at Society of Plastics Engineers
  • Extrusion Board Member at Society of Plastics Engineers
  • President & Chief Technical Officer at Castle Associates  
  • Professor Chemical Engineering at Clarkson University         
  • Manager Process Research and Develoment at Mobile Chemical            
  • Staff Research Engineer at General Motors


Paul G. Andersen

 Paul G. Andersen, Ph.D., is Process Technology Consultant at Coperion Corporation, Ramsey, NJ, USA. He was previously Director, Process Technology at Coperion, a position he held until 2016. In 2009/2010, he was President of the Society of Plastics Engineers (SPE).