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Questions tagged [pei]

Polyetherimide (PEI), AKA Ultem, is used as a build surface due to its adhesion properties

From PEI build surface

PEI (Polyetherimide), also known as Ultem, is a reusable "relatively maintenance free" build surface for both ABS (with a Heated Bed) and PLA (hot or cold) requiring no additional adhesives such as glue or tape. PEI is appealing due to its "no-surface-prep" conditions, which make it convenient to work with. Additionally, printing on PEI requires no support rafts as parts adhere directly to the surface with no issue.

PEI is sometimes incorrectly referred to as BuildTak, however they are not the same thing.

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How does acetone "rejuvenate" PEI?

The Prusa3d knowledge base mentions that acetone will "rejuvenate" PEI in addition to cleaning oil and grease from the surface. About once a week, or when prints stop sticking, use ACETONE to clean the bed. It removes grease better than IPA or…
Mark Harrison
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PRUSA likes the bed to be cleaned with isopropyl alcohol. What else should I use?

I have the original Prusa i3m3 printer. Prusa recommends cleaning the bed before each print with isopropanol (isopropyl alcohol), with only occasional cleaning with acetone. The textured bed prohibits using acetone. Given the SARS-COV-2 situation…
cmm
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Do unused PEI sheets degrade over time?

Will build surfaces coated in PEI lose their qualities, such as adhesiveness, if left unused but removed from packaging for long periods of time?
chobok
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Can "ABS Glue" damage the PEI sheet when used frequently?

I heard about how people dissolve ABS filament in Acetone, resulting in a glue-like solution which then they rub it on the bed and start printing. Apparently, this helps with warping. But I saw it being used only on glass beds, and the printer I…
Bash
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How to attach PEI sheet to glass for high temperature printing?

I am using an Intamsys FunMat HT, which has a "ceramic glass" bed. I'm not sure what "ceramic glass" means, the stuff behaves like borosilicate in the way it either chips or shatters depending on how I abuse it -- so lets just go with "borosilicate…
Bryan Boettcher
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