PEI - Polyetherimide
PEI Polyetherimid Polyetherimide
Application: Components for electrical appliances, medicoapparater, medicinaludstyr, analyseudstyr, microwave ovens, food.
Foam in flight, took, ships and industrial.
Fire: Ignition temperature 535ºC. Flame retardant with low smoke. Meets UL 94 V-0. PEI 1000 approved by the FAA for use in the aerospace industry.
Extrusion: Sheets and bars of PEI 1000 is extruded
Electrical properties:Good electrical properties. Dielectric constant at 1 MHz 3.15
Colors: Amorphous transparent let cute “ravfarvet” plastic.
Moisture absorption: air 23 ° C 50% RF ca. 0,75 % . Buy 23ºC 50% RF ca. 1,35 % .
Physiological properties: PEI 1000 meet EU directives and FDA regulations (USA) for
use with food.
USP approved in class VI.
Trade names: PEI 1000 ULTEM® are trade names of the company General Electric. – Semitron® – As foam Airex ® .
History: I 1982 introduced General Electric PEI
Identification fire test: Flame retardant with low smoke.
Category: Amorphous thermoplastics
See also PSU and PPSU
Chemical resistance: Excellent. Extremely good hydrolysis resistance.
Chemical structure: polymer Density 1,27
Laserskæring: Laser cutting is fine.
Delivery: Rods 5-150 mm. Sheet 10-50 mm. Made of Quadrant EPP in Belgium.
Bonding: PEI kan limes med epoxy-, polyurethan- and siliconelim. PEI can also be bonded with methylene chloride, which dissolves the plastics.
Mechanical properties: Can mechanically charged at temperatures sustained 171ºC, Briefly 210ºC. Gamma and X-rays, has lifted / no influence on PEI-mechanical properties of the plastic. PEI has good fatigue resistance. (Better than PSU and PPSU).
Rockwell R=125
Optical properties: Amorphous transparent let cute “ravfarvet” plastic.
Cleaning: Withstands frequent sterilization with steam. Autoclave.
Injection molding: High process temperature.
Cutting: PEI is excellent to machine cutting. Cooling can be accomplished with air or water,.
Welding: Butt Welding, friction welding and ultrasonic welding. May be friction welded together with ABS.
Thermal Properties. Glasovergangstemperatur 210 °C. Melting point 215ºC. thermal decomposition >530ºC Operating temperature in air, renewable max 171ºC, short term up to 200ºC, PEI which still have high strength and stiffness.
additives: Ultem® 2100 is 10% glasfyldt, Ultem® 2200 is 20% glasfyldt,
Ultem® 2300 is 30% glasfyldt. The carbon fibers may be added.
UV- Stability: PEI 1000 UV stable.
Thermoforming(Termoformning): PEI can be processed by thermoforming, but should be pre-dried before heating. High process temperature is required.
