Polymer Extrusion

Inbunden, Engelska, 2014

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Beskrivning

Extrusion is by far the most important and the oldest processing and shaping method for thermoplastic polymers. This process concerns almost all synthetic polymers, as well as elastomers or food materials. Single-screw extrusion is mainly used nowadays to manufacture finished goods or semi-finished products. More than 90 million tons of thermoplastics are therefore processed every year. Twin-screw extrusion may be divided into two systems: contra-rotating systems used within the context of PVC extrusion, for the manufacture of pipes or profiles; and co-rotating systems experiencing nowadays a very significant development, because of their significant adaptability and flexibility, which enables the manufacture of specific materials (polymer alloys, thermoplastic elastomers, filled polymers, nanocomposites). Extrusion is carried out by passing molten polymer through a tool called die that will give the product its final shape (films and sheets, rolled products, and electric cables). Thanks to the design of dies, we obtain at the output a product with controlled dimensions, uniform speeds and homogeneous temperatures. The book will discuss the same production types, but only in the case of coextrusion flows, i.e. multilayer stratified products. First of all, we will present in this book the physics of the mechanisms at stake, then propose more or less complex models in order to describe these mechanisms and then go forward in the interpretation of results and the control of condition flows.

Produktinformation

Utgivningsdatum:2014-04-25
Mått:157 x 236 x 25 mm
Vikt:658 g
Format:Inbunden
Språk:Engelska
Antal sidor:352
Förlag:ISTE Ltd and John Wiley & Sons Inc
ISBN:9781848216501

Utforska kategorier

Tillverkningsteknik inom Naturvetenskap och teknik

Mer om författaren

Pierre G. Lafleur is Professor of Chemical Engineering at École Polytechnique de Montréal, Québec, Canada.Bruno Vergnes is Senior Scientist at CEMEF - MINES ParisTech in France.

Innehållsförteckning

Introduction ixChapter 1 Continuum Mechanics, Rheology and Heat Transfer Overview 11.1 Continuum mechanics 11.2 Rheology 71.3 Heat transfer [CAR 59, BIR 60, AGA 14] 111.4 Bibliography 19Chapter 2 Calculation Methods 212.1 Introduction 212.2 1D solutions 222.3 2D solutions 282.4 Bibliography 34Chapter 3 Single-Screw Extrusion 373.1 Introduction 373.2 Geometry and approximations 393.3 Solid conveying zone 453.4 Melting zone 733.5 Metering zone 853.6 Overall model 953.7 Technological improvements 993.8 Conclusion 1053.9 Bibliography 105Chapter 4 Co-rotating Twin-Screw Extrusion 1094.1 Twin-screw extrusion 1094.2 General overview of co-rotating twin-screw extruders 1134.3 Solid conveying zone 1204.4 Melting zone 1214.5 Flow in the molten state 1284.6 An overall model of twin-screw extrusion 1514.7 Compounding application and production of complex materials 1624.8 Conclusion 1984.9 Bibliography 198Chapter 5 Profile Extrusion 2115.1 Profile extrusion 2115.2 Pipe extrusion 2295.3 Calibrators 2405.4 Conclusion 2415.5 Bibliography 241Chapter 6 Production of Films and Sheets 2456.1 Introduction 2456.2 Cast film extrusion 2496.3 Film blowing 2566.4 Conclusion 2986.5 Bibliography 298Chapter 7 Wire Coating and Cable Insulation 3057.1 General process 3067.2 Commonly encountered problems 3107.3 Analyses and solutions 3107.4 Conclusion 3307.5 Bibliography 331Index 335