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CPE

Relevant for:

Plus 1.75 mm MK2.5 MK2.5S MK3 MK3S MINI MK3S+MINI+XL MK4 MK3.9 MK3.5 MK4S MK3.9S MK3.5S

Last updated 3 months ago

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Basic info

CPE is a material suitable for prototyping various mechanical parts. Its qualities are similar to PETG, it being odorless and its low warping. CPE has good chemical resistance, layer adhesion, and print surface adhesion.

Recommended nozzle temperature: 275 °C

Recommended bed temperature: 90 °C

Heatbed: Using powder-coated TXT or satin sheet is highly recommended. Printing on the smooth PEI surface might damage the sheet.

Description

CPE is a co-polyester based on terephthalic acid. Thanks to its properties similar to PETG or ABS, and good layer adhesion it’s good for printing prototypes of mechanical parts. CPE excels in its chemical and mechanical resistance and dimensional stability. Unlike with ABS, there is no strong odor or warping issues. CPE is a chemically and temperature-resistant material (resistance up to 75 °C). The tensile strength of CPE is similar to ABS. It’s suitable for printing thin-walled models due to its translucency. CPE is good for making visual and functional prototypes, mechanical parts, etc.

Note that CPE sticks strongly to the print sheet and might damage its surface when being removed too recklessly. As with PETG, clean the smooth sheet with window cleaner, and consider applying a glue stick.

To compare supported material properties, see our material table.

Pros	Cons
✔ Good mechanical resistance	✖ High printing temperature
✔ Good layer adhesion	✖ Too strong print surface adhesion
✔ Good temperature and chemical resistance	✖ Stringing issues similar to PETG
	✖ Hygroscopic material

Best use

The best use of CPE is for printing technical parts requiring good chemical and mechanical resistance. CPE is good for making visual and functional prototypes, mechanical parts, etc.

Tips for successful printing

Most of the print settings are similar to PETG.

Do not print on the smooth PEI sheet as the adhesion may be too strong!

Use a textured print sheet

Make sure the print surface is clean, as described in our dedicated article. It is advisable to use one of the powder-coated print sheets. Do not print on the smooth PEI sheet as the adhesion may be too strong! If you decide to use the smooth PEI sheet anyway, apply a glue stick on it before printing.

Sample prints


Chemically and mechanically resistant parts	Various boxes

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