Polyetherimide

Polyetherimide
Names
Other names
PEI, Ultem
Identifiers
ChemSpider
  • none
ECHA InfoCard 100.126.800 Edit this at Wikidata
Properties
(C37H24O6N2)n
Molar mass Variable
Appearance Amber-to-transparent solid
Density 1.27 g/cm3
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Polyetherimide (PEI; branded as Ultem[1]) is an amorphous, amber-to-transparent thermoplastic with characteristics similar to the related plastic PEEK. When comparing PEI to PEEK, the former is cheaper but has lower impact strength and a tighter temperature range.[2]

PEI plastics were first introduced into the market by General Electric (GE) in 1982 under the trade name Ultem.[3]

Due to its adhesive properties and chemical stability it became a popular bed material for FFF 3D printers.

  1. ^ "Ultem". Curbell Plastics. Retrieved 2 November 2023.
  2. ^ http://www.mcmaster.com/#ultem/=otzvqt Referenced Oct 7, 2013
  3. ^ "What Is Polyetherimide (PEI)?". Retrieved 2024-10-15.

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