Properties of some high technology plastics used in some wands.
PEEK Polyetheretherketone
General Description
PEEK is a high temperature, high cost , semi-crystalline material with excellent mechanical properties and chemical resistance.
Brand Names
Victrex (ICI), Thermocomp (LNP)
Material Mfg.
ICI, LNP
Tensile Strength | Flexural Modulus | Impact Strength | Maximum Temp. | Chemical Resistance | Cost |
14,000-41,000 psi with carbon fibre | 440,000-2,400,000 psi | 0.9-3 ft-lb/in notched izod | 600F short duration 480F long term | Good to Excellent | VERY expensive |
PEI Polyetherimid (Ultem)
General Description
PEI is an amorphous, high temperature material with relatively low cost compared to other high temperature materials. It has excellent elongation and Impact Strength, and can be molded to tight tolerances. Its chemical resistance is not as good as crystalline materials but is excellent for an amorphous material. PEI behaves similar to polycarbonate, but can perform at higher temperatures.
Brand Names
Ultem (GE)
Material Mfg.
GE
Tensile Strength | Flexural Modulus | Impact Strength | Maximum Temp | Chemical Resistance | Cost |
14,000-28,000 psi | 480,000-1,300,000 psi | 2ft-lb/in notched izod 25ft-lb/in un-notched | 420F short duration 375F long term | Fair to Good | Expensive |
PES Polyethersulfone
General Description
Polyethersulfone is a high temperature amorphous material with relatively low cost. PES has slightly lower capabilities than PEI at about the same cost. As a result it is not widely used.
Brand Names
Thermocomp (LNP), Victrex (ICI)
Material Mfg.
LNP, ICI
Tensile Strength | Flexural Modulus | Impact Strength | Maximum Temp. | Chemical Resistance | Cost |
9,500-18,000 psi | 590,000-1,200,000 psi | 1.4ft-lb/in notched izod | 400F short duration 350F long term | Good to Excellent | Expensive |
PPS Polyphenylene Sulfide
General Description
PPS is a high temperature semi-crystalline material. It has good mechanical properties and excellent chemical resistance at elevated temperatures. PPS has been compounded extensively and many different types of properties are available. PTFE filled PPS is one of the best bearing materials available. Unfilled grades of PPS have poor properties, so components are usually made from glass filled or glass/mineral filled grades. PPS is very sensitive to molding conditions and must be processed properly to achieve its maximum potential.
Brand Names
Fortron (Hoechst Celanese), Lubricomp (LNP), Ryton (Phillips), Supec (GE)
Material Mfg.
GE, Hoechst Celanese, LNP, Phillips
Tensile Strength | Flexural Modulus | Impact Strength | Maximum Temp. | Chemical Resistance | Cost |
14,000-28,000 psi | 550,000 -2,900,000 psi | 0.5-6ft-lb/in notched izod | 500F short duration 450F long term | Good to excellent | Variable |
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