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Mixing on Melting in Single Screw Extrusion
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H. Benkreira
Veröffentlicht/Copyright:
27. Mai 2013
Abstract
A new approach to assessing mixing in single screw plasticating extruders is proposed. It is based on image analysis of microtomed sections obtained from the polymer helix formed in a suddenly cooled split barrel extruder fed with a mixture of black and white polymer granules. The observations suggest that most of the mixing occurs on melting with little improvement thereafter. A simple laminar mixing model is drawn in the melting zone the results of which compare favourably with experimental data. In particular, it is shown that improved mixing can be achieved with increasing screw speed in complete contradiction with the classical strain theories which consider mixing in the melt conveying zone only.
Received: 1991-3
Accepted: 1991-8
Published Online: 2013-05-27
Published in Print: 1992-05-01
© 1992, Carl Hanser Verlag, Munich
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Artikel in diesem Heft
- Contents
- Contents
- Continuous Mixing and Compounds
- Starve-fed Flow in Co-Rotating Twin Screw Extruders
- Process for Improvement in Toughness of Unsaturated Polyester with Elastomer
- Mechanical Properties of Thermoplastic Polyurethane Blends and Copolymers of Styrene and Acrylonitrile
- Extrusion
- Mixing on Melting in Single Screw Extrusion
- Numerical Study of Slip at the Walls in the Extruder
- Elimination of Sag in Plastic Pipe Extrusion
- Fibers and Film
- Issues Concerning the Rate of Heat Transfer from a Spinline
- Skew Stretched Polycarbonate Films
- Molding
- Molecular Orientation in Injection-Molded Polypropylene Copolymers with Ethylene
- Melt-recrystallization of Talc-filled Polypropylene Injection Moldings
- Processing Characteristics of Thermoplastic Sheet Composites
- Rapid Communication of Recent Advances
- The Face-relief Strategy for Design of Profile Dies
Artikel in diesem Heft
- Contents
- Contents
- Continuous Mixing and Compounds
- Starve-fed Flow in Co-Rotating Twin Screw Extruders
- Process for Improvement in Toughness of Unsaturated Polyester with Elastomer
- Mechanical Properties of Thermoplastic Polyurethane Blends and Copolymers of Styrene and Acrylonitrile
- Extrusion
- Mixing on Melting in Single Screw Extrusion
- Numerical Study of Slip at the Walls in the Extruder
- Elimination of Sag in Plastic Pipe Extrusion
- Fibers and Film
- Issues Concerning the Rate of Heat Transfer from a Spinline
- Skew Stretched Polycarbonate Films
- Molding
- Molecular Orientation in Injection-Molded Polypropylene Copolymers with Ethylene
- Melt-recrystallization of Talc-filled Polypropylene Injection Moldings
- Processing Characteristics of Thermoplastic Sheet Composites
- Rapid Communication of Recent Advances
- The Face-relief Strategy for Design of Profile Dies
