Ultem vs PEI?

[andro]

is ultem and pei the same material?

 

[RichJB]

Yes. Ultem is the brand name, PEI (Polyetherimide) is the material. From Wiki:

Ultem is a family of PEI products manufactured by SABIC as a result of acquiring the General Electric Plastics Division in 2007, developed by Joseph G. Wirth in the early 1980s.

 

[zadiac]

It's like Delrin and Acetyl. Delrin is a brand name, Acetyl is the material. Contacted Maisy Plastics to buy delrin and this is what they told me.