PESU (POLYETHERSULPHONE)
VICTREX®   ULTRASON E®

SPECIFICATIONS:
   FDA TITLE 21 CFR 177.2440

NATURAL COLOUR:
   TRANSPARENT AMBER

Yet another of the high strength, high temperature resistant polymers; with toughness and outstanding long term creep resistance being two of the more important characteristics of this amorphous material. PESU has the ability to maintain much of its strength at elevated temperatures. And, like Polyether-Imide, can be repeatedly steam sterilized without significantly affecting physical properties. PESU has good hydrolysis and chemical resistance. It is unaffected by non-oxidizing acids, bases, aqueous solutions, aliphatic hydrocarbons and alcohols. Concentrated oxidizing acids, ketones, esters, some aldehydes, some halogenated hydrocarbons and some aromatic hydrocarbons attack PESU while polar aromatic hydrocarbons are solvents for it. As well, PESU has good flame resistance and emits low amounts of smoke when burning. The resistance of PESU to deterioration by alpha, beta and gamma radiation is reasonable but UV degrades this material and only pigmenting with carbon black results in stability. The FDA has approved this product for direct food contact. With high temperature resistance and retention of electrical insulation properties over a wide range of temperature and frequency, PESU can be used in some "Class H" electrical applications. PSEU can be either solvent cemented or adhesive bonded using polar adhesives. In addition, it can be ultrasonic, butt, fusion and hot gas welded plus vacuum formed. Of particular interest is the ability of PESU to be plated and vacuum metalized without the need of a base lacquer. The machinability of PESU is very good using high-speed tooling at high speeds and high feed rates. To be safe water based emulsion coolants should be used to ensure that parts are not subject to chemical stress when machining. GLASS-FILLED grades should be machined using carbide.

GENERAL PROPERTIES
  ASTM
test		 4000G
SPECIFIC GRAVITY   D792 1.37
TENSILE STRENGTH psi D638 12200
TENSILE MODULUS 105 psi D638 3.5
ELONGATION % D638 40
FLEXURAL STRENGTH psi D790 18700
FLEXURAL MODULUS 105 psi D790 3.77
COMPRESSIVE STRENGTH 10% psi D695 18000
COMPRESSIVE MODULUS 105 psi D695 3.56
HARDNESS rockwell M D785 M88
IMPACT STRENGTH (1/2" x 1/2") ft-lb/inch of notch D256 1.6
THERMAL EXPANSION 10-5/°F D696 3.1
HEAT RESISTANCE (continuous in air) °F   374
DEFLECTION TEMPERATURE   D648  
@ 264 psi °F   397
@ 66 psi °F   N/A
DIELECTRIC STRENGTH v/mil D149 400
DIELECTRIC CONSTANT   D150 3.5
DISSIPATION FACTOR 10-3 D150 1 to 6
WATER ABSORPTION 24hrs % D570 0.43
FLAMMABILITY in/min D635 <0.01
OPTICAL PROPERTIES
REFRACTIVE INDEX   D542 1.65
LIGHT TRANSMITTANCE % D1003  
parallel      
total     88
haze      

PLEASE NOTE:
Values shown in the above table are averages and there will be variances from lot to lot. After selecting a material based upon these values, you must conduct tests specific to your application to be assured the material suits your needs.