Mixing in single screw extrusion /

A lot of plastics products are extruded and most of those products contain additives, which mean that the plastic must be mixed at some point. Mixing is generally done with a twin-screw extruder, and the single-screw extruder, which is used in product production, is generally overlooked as a device...

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Detalles Bibliográficos
Clasificación:Libro Electrónico
Autor principal: Gale, Martin
Autor Corporativo: Rapra Technology Limited
Formato: Electrónico eBook
Idioma:Inglés
Publicado: Shrewsbury, U.K. : ISmithers, ©2009.
Temas:
Plastics > Extrusion.
Matières plastiques > Extrusion.
TECHNOLOGY & ENGINEERING > Chemical & Biochemical.
Acceso en línea:Texto completo
Tabla de Contenidos:
  • Machine generated contents note: 1. Need for Good Mixing in Single Screw Extrusion
  • 1.2. Examples of Mixing Problems
  • 1.2.1. Polyethylene Pipes and Cables
  • 1.2.2. Blow Moulded Bottles
  • 1.2.3. Chalk Filled Polypropylene Pipe
  • 1.2.4. Blown Film
  • 1.2.5. Industrial Blow Mouldings
  • 1.2.6. Production Scrap Re-use
  • 1.2.7. Agglomerates and Gels in Thin Extrusions
  • 1.2.8. Transparent Polycaprolactone/SAN Blends
  • 1.2.9. Decorative Wood Grain Effects
  • References
  • 2. Dispersive and Distributive Mixing
  • 2.1. Definitions and Illustrations
  • 2.2. Dispersive Mixing
  • 2.2.1. Dispersive Mixing Mechanisms
  • 2.2.2. Dispersive Mixing of Additive Powders Such as Pigments
  • 2.3. Distributive Mixing
  • 2.3.1. Laminar Shear Flow Mixing
  • 2.3.2. Measurement of Distributive Mixing Achieved by Laminar Shearing
  • 2.3.3. Limitations of Lamina Flow Mixing
  • 2.3.4. Eliminating Laminar Striations
  • References
  • 3. Measurement of Mixing
  • 3.1. Need for Measurement of Mixing
  • 3.2. Striation Thickness Measurement
  • 3.3. Agglomerate Measurement
  • 3.3.1. Microscopy Examination of Thin Samples
  • 3.3.2. Agglomerate Count for Blown Film
  • 3.3.3. Screen Pack Filtration Test
  • 3.4. Influences of Mixing on Product Properties
  • 3.5. Preparation of Thin Sections for Optical Microscopy Assessment
  • References
  • 4. Single Screw Extruder Stages: Effects on Mixing
  • References
  • 5. Pellet Handling: A Source of Variable Composition
  • 5.1. Introduction
  • 5.2. Hopper Design
  • 5.2.1. Mass Flow Hopper
  • 5.2.2. Non-mass Flow Hopper
  • 5.2.3. Round Hoppers
  • 5.2.4. Square and Rectangular Hoppers
  • 5.2.5. Ledges and Corners
  • 5.3. Composition Variations
  • 5.3.1. Example 1
  • 5.3.2. Example 2
  • 5.3.3. Example 3
  • 5.3.4. Other Systems
  • 5.4. Measurement of Particulate Properties
  • 5.4.1. Hopper Flow Tests.

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