Foam extrusion : principles and practice
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Bibliographic Information
Foam extrusion : principles and practice
Technomic Pub. Co., c2000
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Note
Includes bibliographical references and index
Description and Table of Contents
Description
Foam Extrusion: Principles and Practice combines the science of foam with the engineering of extrusion processes in one comprehensive volume, joining scientific principles and engineering practice. Starting with the fundamentals and then moving to phase separation, the text lays the scientific foundation in such a manner that the microscopic transition from a nucleus to a void (nucleation) and macroscopic movement from a void to an object (formation) are plausibly addressed. The last section of the book presents interesting foam extrusion developments, demonstrating how scientific findings can be applied to the engineering field, from principles to batch experimentation and continuous foaming. Each chapter concludes with a section of references for further study, and most include a nomenclature section and/or summary section as well. Drawing from the experience of the editor and the authors, Foam Extrusion: Principles and Practice captures the interesting evolution of foam extrusion, and offers a solid foundation for future developments. It is an informative guide for anyone involved with this field.
Table of Contents
INTRODUCTION
Thermoplastic Foam
Foam Extrusion
Recent Developments
Outline of the Book
STATISTICAL THERMODYNAMICS OF GAS SOLUBILITY IN POLYMERS
Introduction
Thermodynamics
Statistical Thermodynamics
Methodology
Experiment versus Theory
Outlook
RHEOLOGY OF THERMOPLASTIC FOAM EXTRUSION PROCESS
Introduction
Shear Rheology of Blowing Agent-Charged Polymeric Systems
Extensional Rheology for Extrusion Foaming of Polymers
Elongational Rheology of Blowing Agent-Charged Polymeric Systems
Conclusion
FOAM NUCLEATION IN GAS-DISPERSED POLYMERIC SYSTEMS
Introduction
Equilibrium Considerations
Conventional Nucleation Theories
Cavitation
Foam Extrusion Nucleation
Summary
Nomenclature
FOAM GROWTH IN POLYMERS
Introduction
Importance
Literature Review: Cell Model
Foam Growth Experiment
Foam Growth Modeling
Foam Growth Equations
Boundary Conditions
Theory versus Experiment
Conclusions
Nomenclature
POLYMERIC FOAMING SIMULATION: BATCH AND CONTINUOUS
Introduction
Batch Foaming
Continuous Foaming
Conclusions
Nomenclature
PROCESS DESIGN FOR THERMOPLASTIC FOAM EXTRUSION
Introduction
High-Density Structural Foam Process
Low-Density Foam Process
Die Design Procedures for Foam Extrusion
FOAM EXTRUSION MACHINERY FEATURES
Preface Regarding Extruders for Foaming
Basic Properties of Extruders
Extruder Types, Support Devices, and Placement of Subprocesses
General Extruder Observations
MIXING DESIGN FOR FOAM EXTRUSION: ANALYSIS AND PRACTICES
Introduction
Thermoplastic Foam Extrusion Processes
Mixing-Theories and Experiments
Mixing Practices in Single and Twin-Screw Extruders
Process Challenges
Summary
Nomenclature
FOAMING AGENTS FOR FOAM EXTRUSION
Introduction
Physical Foaming Agents
Chemical Foaming Agents
CONTINUOUS PRODUCTION OF HIGH-DENSITY AND LOW-DENSITY MICROCELLULAR PLASTICS IN EXTRUSION
Introduction
Previous Studies on Batch and Semi-continuous Microcellular Processing
Background on Microcellular Plastics Processing
Formation of a Single Phase Polymer/Gas Solution
Microcellular Nucleation Control
Suppression of Cell Coalescence
Promotion of Large Volume Expansion
Experimental Set-Up
Experiments and Discussion
Summary and Conclusions
Nomenclature
FOAM EXTRUSION OF POLYETHYLENE TEREPHTHALATE (PET)
Introduction
Review of PET Chemistry and Processing Characteristics
Foaming with Physical Blowing Agents
Foaming with Chemical Blowing Agents
Conclusion
by "Nielsen BookData"