Read R-PEI.indd text version

POLYETHERIMIDE (PEI)

1. Common trade names: 2. Density 3. Mold Shrinkage 4. Continuous Service Temp 5. Melting Point 6. Processing Temp 7. Tensile Strength 8. Izod Impact Strength 9. Compressive Strength 10. Flexural Strength, yeild 11. Elongation, tensile break 12. Dielectric Strength 13. Water Absorption, 24 hours 14. Coefficent of Lin. Thermal Expansion 15. Crystalline or Amorphous 16. Clarity 17. Flammability 18. Process: Drying Required 19. Hot Stamp 20. Machining Qualities 21. Creep Resistance 22. Ultrasonic Welding 23. Low Friction 24. Abrasion Resistance 25. Solvent Resistance 26. UV Resistance 27. Environmental Stress Crack Resistance 28. FDA 29. Living Hinge 30. Year Developed 31.Cost: year 2006

$/lb. @ 5,000 lbs.

Ultem, RTP, Thermocomp

UNITS

g/cm³ in./in. °F °F °F lb in.² ft-lb in. 10³ lb. in.² 10³ lb. in.² % V 10-3 in. % 10-5 in. in. °F

C = Crystalline A = Amorphous O = Opaque TP = Transparent TL = Translucent

Flame Resistance High Low 5VA 5VB V-0 V-1 V-2 HB

1.27 0.007 338 640-800 660-750 15200 1 21.9 22 60 831 0.25 3.1 A

Mass per unit volume Size of part versus mold cavity Highest temp material can perform reliably for the long term Tempurature material begins to melt Recommended tempurature for molding Maximum stress without yielding to a stretching mold Energy required to break at a v-notch Resist a crushing force Resistance to fracture during bending Stretching ability before breaking Voltage material can withstand before dielectric breakdown * = aluminum oxide % Water absorbed when immersed in water for 24 hours Change in length per change in temperature Crystalline: arranged polymer, sharp melting point Amorphous: random polymer, broad melt ) Opaque = no light passes through it Transparent = some light passes through it Translucent = light passes dirrectly through it Reference standard UL 94 Is it recommended to dry the material prior to molding? Does the material hot stamp? How does the material machine? Can this material keep it's shape under load? * = with additive or co-polymer Does the material weld via ultrasonics? Surface lubricity How well does the material withstand wear? * = with additive or co-polymer How well does the material withstand chemicals? How well does the material withstand UV rays? * = with UV additive Can this material resist environmental stress cracking? * = with additive or co-polymer Are there FDA grades available? Can this material be used in a living hinge application?

TL

5V Yes Yes Excellent Good

Qualitative Scale: Excellent, Good, Fair, Poor

Good Fair Good* Good Good Poor Yes No 1980 $10.63

Natural/Black Year 2006

32. Applications:

Electrical Connectors, Temperature Sensors, Lamp Sockets, Jet Engine Components, Medical/Autoclave, Surgical Instruments, Pressure Vessels, Microwave Cookware

© 2007 Steinwall Inc.

Information

R-PEI.indd

1 pages

Report File (DMCA)

Our content is added by our users. We aim to remove reported files within 1 working day. Please use this link to notify us:

Report this file as copyright or inappropriate

474248


You might also be interested in

BETA
AIMS FIBERGLASS STRUCTURAL DESIGN MANUAL
GM_Tufram_2011