Twin Screw Compounding of PE-HD Wood Flour Composites
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Y. Wang
Abstract
The compounding of wood flour filled polyethylene is discussed with reference to co-rotating twin-screw extruders from two manufacturers. An acrylic acid-grafted polyethylene (PE-HD-AA) copolymer was used as the compatibilizer in high density polyethylene wood flour (PE-HD/WF) composite system. Special consideration was given to the compounding of the heat- and shear-sensitive wood flour. The relevant screw configuration was found to consist of short mixing length with low intensity of shearing. A suitable combination of processing variables was necessary for limiting the thermal degradation of the wood filler, however, tensile properties of the composites were not affected much. Furthermore, the allowable range of processing temperature was limited, and there was an upper bound of rotating speed and a lower bound of throughput rate within which the darkening of wood filler in the composites was acceptable. The processing window was also experimentally constructed in terms of the degree of darkening of wood composites.
© 2001, Carl Hanser Verlag, Munich
Articles in the same Issue
- Editorial
- Ninth of a Series Pioneer of the Modular Co-rotating Twin Screw Extruder–Rudolf Erdmenger (1911–1991)
- Internal Mixer
- The “New-Generation” Co-flow Intermeshing Internal Mixer
- Screw Extrusion/Continuous Mixers
- Twin Screw Compounding of PE-HD Wood Flour Composites
- A Transient Melting Model of Polymer Balls Sliding Against the Barrel
- Prediction of Screw Length Required for Polymer Melting and Melting Characteristics
- Melting of Polymer Blends in Co-rotating Twin Screw Extruders
- Melting of Polymer Blends in Co-rotating Twin Screw Extruders
- Melting of Polymer Blends in Co-rotating Twin Screw Extruders
- The Mapping Method for Mixing Optimization Part I: The Multiflux Static Mixer
- The Mapping Method for Mixing Optimization
- Reactive Processing
- Comparison Studies of Anionic Polymerization of Caprolactam in Different Twin Screw Extruders
- Compatibilization of SBR/NBR Blends Using Chemically Modified Styrene Butadiene Rubber
- Coextrusion
- Convective Instabilities in the Coextrusion Process
- Numerical Simulation of Polymer Coextrusion Flows
- Thermoforming
- Tight Tolerance Thermoforming
Articles in the same Issue
- Editorial
- Ninth of a Series Pioneer of the Modular Co-rotating Twin Screw Extruder–Rudolf Erdmenger (1911–1991)
- Internal Mixer
- The “New-Generation” Co-flow Intermeshing Internal Mixer
- Screw Extrusion/Continuous Mixers
- Twin Screw Compounding of PE-HD Wood Flour Composites
- A Transient Melting Model of Polymer Balls Sliding Against the Barrel
- Prediction of Screw Length Required for Polymer Melting and Melting Characteristics
- Melting of Polymer Blends in Co-rotating Twin Screw Extruders
- Melting of Polymer Blends in Co-rotating Twin Screw Extruders
- Melting of Polymer Blends in Co-rotating Twin Screw Extruders
- The Mapping Method for Mixing Optimization Part I: The Multiflux Static Mixer
- The Mapping Method for Mixing Optimization
- Reactive Processing
- Comparison Studies of Anionic Polymerization of Caprolactam in Different Twin Screw Extruders
- Compatibilization of SBR/NBR Blends Using Chemically Modified Styrene Butadiene Rubber
- Coextrusion
- Convective Instabilities in the Coextrusion Process
- Numerical Simulation of Polymer Coextrusion Flows
- Thermoforming
- Tight Tolerance Thermoforming
