October 2010 | Focus: High Performance Plastics
PEEK properties meet wide spectrum of high-performance requirements
Polyetheretherketone (PEEK) is a linear aromatic polymer widely regarded as the highest performance melt-processable thermoplastic on the market today. What distinguishes semi-crystalline PEEK from other high-performance polymers is its ability to meet so many performance requirements while allowing engineers and designers to reduce overall system costs due to increased design freedom, part consolidation and improved durability. Tough and rigid, PEEK is an ideal replacement for metals, ceramics and other polymers due to its outstanding combination of mechanical, electrical and thermal properties. Its design and processing flexibility allow PEEK to be specified in a wide range of demanding applications where its unique properties are critical to performance. Read more.
Polyetherimide (PEI) plastics
Polyetherimide (PEI) is an amorphous, transparent amber polymer that is characterized by high heat resistance, excellent electrical properties, inherent UV and flame resistance, along with low smoke generation. PEI resins are available in an unreinforced general purpose grade, several glass fiber-filled grades (10%, 20% and 30%) and bearing grades. Main features of PEI are: excellent dimensional stability, good UV and hydrolysis resistance, transparent to visible infrared and microwave radiations, inherent flame retardancy, FDA and USP Class VI compliant. Read more.
Chemical handling applications for PVDF and PVDF copolymers
Since the construction of the first polyvinylidene fluoride (PVDF) commercial plant in 1965, in Calvert City, KY, USA, this product has been used in many types of chemical industries. The first applications for PVDF centered on the excellent chemical resistance to chlorine and chlorinated solvents, bromine, hot acids and combinations of chemicals for waste handling. Users in these chemical areas soon discovered PVDF had other special properties not universally associated with all plastics. PVDF was found to offer high abrasion resistance similar to UHMW-PE and nylon; high tensile strength at elevated temperatures, which set it apart from commodity plastics and other fluoropolymers. This article is intended to help equipment designers and engineers who would prefer a thermoplastic material over metal components for chemical-related applications, but have not found a material that meets all their needs in an economical fashion. Read more.
Polyphenylene sulfide (PPS) in review
PPS is a versatile material that gives extruded and molded components the ability to meet exceptionally demanding criteria. This semi-crystalline engineering thermoplastic has outstanding thermal stability, superior toughness, inherent flame resistance and excellent chemical resistance. It also has high mechanical strength, impact resistance and dimensional stability, as well as good electrical properties. As a well-known polymer with a long application history, suppliers continue to push it to new levels of performance to meet the expanding needs of designers and manufacturers. Read more.
Diversity in PTFE
Since its discovery in 1938, polytetrafluoroethylene (PTFE) has revolutionized the progress of modern man, as did the discovery of fossil fuels. PTFE has opened new doors for significant advancements in a variety of different technologies. From the aerospace industry to the food processing industry, PTFE has aided in many benefits to mankind. PTFE has been commonly used in its virgin state. The material’s chemical inertness, low coefficient of friction and high temperature resistance are but a few advantages that it has to offer. As use of this material increased, so did the applications for it. Chemists soon began to add additional materials within PTFE to increase a variety of properties for their respective applications. Read more.
Online Plastic Resources
Your IAPD distributor is your best source for finding the right material for your application. Go to www.iapd.org to find a distributor in your area. You can search by company name, location or product category.
The IAPD Magazine web site at www.theiapdmagazine.com allows you to search by material, trade name and fabrication process. You can also search for fabrication capabilities.