Blown film extrusion / Kirk Cantor.

Format:

Book

Author/Creator:

Cantor, Kirk, author.

Language:

English

Subjects (All):

Plastic films.

Physical Description:

1 online resource (xiv, 179 pages)

Edition:

Third edition.

Place of Publication:

Munich ; Cincinnati : Hanser Publishers : Hanser Publications, [2019]

Summary:

"From hardware and materials through processing and properties, a broad coverage of blown film extrusion is presented. A primary objective of this book is to ensure a useful balance of theory and practice. The reader will find the answers to why they encounter certain effects in the blown film process so that they are better able to troubleshoot and improve their operations. At the same time, current practices and equipment are emphasized to keep readers up-to-date with the most productive and efficient technology. The companion computer-based learning tool, The Blown Film Extrusion Simulator, is provided to enhance the reader's understanding. This software was developed specifically to teach blown film extrusion equipment operation and processing principles, and is available for download. Throughout this book, exercises using the simulator are described to complement the methods and principles explained. New in this third edition is a chapter on polymer rheology, with an overview of the rheology of polymer melts and its effect on extruding blown film. Additionally, improvements and corrections have been made throughout the book. Contents: Materials for Blown Film Polymer Rheology Extrusion Overview Hardware for Blown Film Processing Coextrusion Film Properties Troubleshooting"-- Provided by publisher.

Contents:

Intro

Acknowledgments

Preface

Contents

1 Materials for Blown Film

1.1 Polymers

1.1.1 Polyethylene (PE)

1.1.1.1 Low Density Polyethylene (LDPE)

1.1.1.2 High Density Polyethylene (HDPE)

1.1.1.3 Linear Low Density Polyethylene (LLDPE)

1.1.1.4 Medium Density Polyethylene (MDPE)

1.1.1.5 Metallocene Polyethylene (mPE)

1.1.2 Polypropylene (PP)

1.1.3 Polystyrene (PS)

1.1.4 Ethylene Vinyl Acetate (EVA)

1.1.5 Ethylene Vinyl Alcohol (EVOH)

1.1.6 Polyvinyl Chloride (PVC)

1.1.7 Polyvinylidene Chloride (PVDC)

1.1.8 Polyamide (PA)

1.1.9 Polyurethane (PU)

1.2 Additives

1.2.1 Antiblocking Agents

1.2.2 Antioxidants

1.2.3 Antistatic Agents

1.2.4 Colorants

1.2.5 Lubricants

1.2.6 Reinforcements and Fillers

1.2.7 Stabilizers

1.2.8 Tackifiers

2 Polymer Rheology

2.1 Basic Concepts

2.2 Variables Influencing Viscosity

2.2.1 Process Conditions

2.2.2 Molecular Structure

2.2.2.1 Molecular Weight

2.2.2.2 Molecular Weight Distribution

2.2.2.3 Chain Branching

2.3 Rheology in Blown Film Extrusion

2.3.1 Inside the Extruder and Die

2.3.2 In the Bubble

3 Extrusion Overview

3.1 Extruder Hardware Systems

3.1.1 Drive System

3.1.1.1 Motor

3.1.1.2 Speed Reducer

3.1.1.3 Thrust Bearing

3.1.2 Feed System

3.1.3 Screw/Barrel System

3.1.3.1 Screw

3.1.3.2 Barrel

3.1.4 Head/Die System

3.1.4.1 Head Assembly

3.1.4.2 Adapter

3.1.4.3 Breaker Plate

3.1.4.4 Melt Filter

3.1.4.5 Die

3.1.5 Instrumentation and Control System

3.1.5.1 Temperature Control

3.1.5.2 Head Pressure

3.1.5.3 Motor Current

3.2 Inside the Extruder

3.2.1 Solids Conveying

3.2.1.1 Gravity-Induced Region

3.2.1.2 Drag-Induced Region

3.2.2 Melting

3.2.3 Melt Pumping

3.2.4 Mixing

3.2.4.1 Distributive Mixing

3.2.4.2 Dispersive Mixing.

3.2.4.3 Mixing Devices

3.2.5 Degassing

3.2.6 Die Forming

4 Hardware for Blown Film

4.1 Upstream Components

4.2 Grooved Feed Throat

4.3 Screws for Blown Film Extrusion

4.4 Blown Film Dies

4.5 Bubble Geometry

4.6 Bubble Cooling

4.7 Bubble Stabilization

4.8 Collapsing Frames

4.9 Haul-off

4.10 Winders

4.11 Film Treatment

4.12 Line Control

5 Processing

5.1 Process Variables vs. Bubble Geometry

5.2 Characteristic Bubble Ratios

5.3 Process/Structure/Property Relationships

5.4 Double Bubble Processing

6 Coextrusion

6.1 Dies

6.2 Interfacial Instabilities

6.3 Product Applications

6.3.1 Breathable Packaging

6.3.2 Shrink Film

6.3.3 High Barrier Film

7 Film Properties

7.1 Tensile Strength (ASTM D882)

7.2 Elongation (ASTM D882)

7.3 Tear Strength (ASTM D1004, D1922, and D1938)

7.4 Impact Resistance (ASTM D1709, D3420, and D4272)

7.5 Blocking Load (ASTM D3354) and Coefficient of Friction (ASTM D1894)

7.6 Gel (Fisheye) Count (ASTM D3351 and D3596)

7.7 Low Temperature Brittleness (ASTM D1790)

7.8 Gloss (ASTM D2457)

7.9 Transparency (ASTM D1746)

7.10 Haze (ASTM D1003)

7.11 Density (ASTM D1505)

7.12 Melt Flow Rate (ASTM D1238)

7.13 Viscosity by Capillary Rheometry (ASTM D3835)

8 Troubleshooting

8.1 Extruder Problems

8.1.1 Surging

8.1.2 High Melt Temperature

8.1.3 Excessive Cooling

8.1.4 Low Output

8.2 Film Problems

8.2.1 Melt Fracture

8.2.2 Thickness Variation

8.2.3 Die Lines

8.2.4 Gels

8.2.5 Low Mechanical Properties

8.2.6 Poor Optical Properties

8.2.7 Wrinkles

9 Appendices

9.1 Appendix 1: The Blown Film Extrusion Simulator

9.1.1 Introduction

9.1.2 Download and Installation

9.1.3 Running the Program

9.1.4 Worksheet

9.2 Appendix 2: Useful Equations

References

Index

Leere Seite.

Notes:

Description based on print version record.

Description based on publisher supplied metadata and other sources.

Other Format:

Print version: Cantor, Kirk, author. Blown film extrusion

ISBN:

9781523124817

1523124814

9781569906972

1569906971

9781569906965

1569906963

OCLC:

1435753804