Permeability Properties of Plastics and Elastomers

A Guide to Packaging and Barrier Materials

Liesl K. Massey

• Publisher: William Andrew
• Year: 2003
• Print ISBN: 9781884207976
• eBook ISBN: 9780815518518
• Edition: 2
• Topic: Technology & Engineering
• Subtopic: Industrial Design
• Index: Technology & Engineering

This extensively revised and updated second edition of the only data handbook available on the properties of commercial polymeric films details the permeability characteristics of over 125 major plastic and elastomer packaging materials. New to this edition are 92 resin chapters containing textual summary information including: category, general description, processing methods, applications, and general permeability considerations for water vapor, oxygen, and other gases including aroma and flavor. The product data is presented in graphical and tabular format, retaining the familiar format of the first edition and allowing easy comparison between materials and test conditions.

Thermoplastics

Acetal Resins

Chapter 1 Polyoxymethylene (Acetal)

Category: Engineering Resin

General Description: Acetal, chemically known as polyoxymethylene (POM), is a versatile engineering resin. The chemical composition, regular molecular structure, and high degree of crystallinity give acetals excellent resistance to moisture, gasoline, solvents, and many other neutral chemicals.^[2001]

Processing Methods: Injection molding, extrusion (rod, slab, sheeting, small diameter tubing). Parts can be machined or stamped.^[2001]

Applications: Aerosol containers, gas caps, chemical sprayers, soap dispersers, paint mixing paddles, plumbing components, gears, tough and creep resistance housings, and wear surfaces.^[2001]

Permeability to Oxygen and Other Gases: Test results show that above 10 mil film thickness the permeability of both Ticona Celcon acetal unfilled and glass-reinforced grades are approximately the same.^[2002]

Permeability to Water and Other Liquids: DuPont Delrin has good impermeability to many substances including aliphatic, aromatic, and halogenated hydrocarbons, alcohol, and esters. Permeability characteristics and strength properties of Delrin make it suitable material for containers, particularly of the aerosol type.^[2001]

Exceptional resistance to long-term exposure to high humidity and hot water is a primary reason why Ticona Celcon acetal is so widely used for many plumbing related applications. See manufacturer’s literature for more detail.^[2002]

Permeability Data by Material Supplier Trade Name: See Tables 1-01 through 1-06.

Table 1-01 Cologne, Shampoo, and Hair Spray Through DuPont Delrin Acetal Resin

Table 1-06 Nitrogen and Carbon Dioxide Through Ticona Acetal Copolymer Film

Table 1-02 Gasoline, Freon Propellant, Motor Oil, and Ethyl Alcohol Through DuPont Delrin Acetal Resin

Table 1-03 Methyl Salicylate, Nitrogen, Perchloroethylene, Trichloroethylene, Toluene, Carbon Dioxide, and Oxygen through DuPont Delrin Acetal Resin

Table 1-04 Mineral Oils, Vegetable Oils, Tar Remover, and Road Oil Remover Through DuPont Delrin Acetal Resin

Table 1-05 Air and Oxygen through Ticona Acetal Copolymer...

Table of contents

• Cover image
• Title page
• Table of Contents
• Copyright
• Preface
• Introduction
• Thermoplastics
• Thermoplastic Alloys
• Multilayer Structures
• Thermosets
• Thermoplastic Elastomers
• Rubbers
• Permeability of Gloves
• Permeation Rates
• Permeability Units Conversion
• Glossary of Terms
• Trade Name
• References