ecoPET 9021

Sustainable technical material

Spectrum ecoPET 9021 is another polyester technical material available in our range. Unlike the more widely used PETG in 3D printing, it is based on a non-glycol-modified variant of polyethylene terephthalate (PET). The lack of glycol translates into significantly higher rigidity and tensile strength of PET compared to PETG.

In line with the movement to maximise the proportion of recycled materials in production, we decided to use recyclate as a raw material source by introducing the ecoPET 9021 technical filament. With classic recycling, which involves regranulation of flakes from cut bottles, it is extremely difficult to achieve adequate purity and homogeneity of the material. This is because manufacturers usually produce packaging from different PET grades. A mix of different materials usually translates into subsequent problems in the printing process of the filament created from such a regranulate.

In order to ensure quality and ease of printing, the recycled filament must have high purity and homogeneity, which is why we turned to a more advanced raw material created by chemical depolymerisation and re-polymerisation of waste. As a result, the Spectrum ecoPET 9021 filament does not differ in printability from other materials derived from virgin material while retaining more than 90% recycled content in its composition.

This approach has resulted in a reproducible, eco-friendly and easy to print filament. Its advantages over classic PETG are not only its impressive thermal resistance of up to 125°C (max. 200h) and low water absorption but also its higher tensile strength and rigidity. Spectrum ecoPET 9021 can be used in prints requiring high rigidity and chemical and thermal resistance. Areas of application include functional prototypes and serial parts in mechanical, automotive and medical industries, among others.

Technical data

Available diameter:
1.75 [mm]
Diameter tolerance:
+/- 0.03 [mm]
1.36 g/cm3
Thermal resistance:
Service temp. (200h) - 125°C
Surface finish:
Verify your spool:
YES (course of diameter online graph - on the entire length of the spool, mean diameter, ovality, standard deviation individually for each manufactured spool)

How to use

Nozzle temperature:
Bed temperature:
Recommended printing speed:
30-70 mm/s
Recommended shell thickness:
0.40 - 2.70mm
Recommended layer height:
0.05 - 0.30mm
Active cooling fan:
Closed chamber for printing:
recommended for larger prints
Dry box recommended:
Ruby or hardened nozzle recommended:
recommended (Dimafix, 3DLac, Magigoo)

Material characteristics

  • thermal resistance up to 125°C (max. 200h)
  • tensile strength increased by 20% compared to conventional PETG
  • rigidity increased by 50% compared to conventional PETG
  • good chemical resistance
  • high surface quality after printing
  • good impact strength
  • perfect bonding of the layers


  • functional prototypes,
  • production tooling
  • zero-waste manufacturing of parts
  • manufacturing of parts exposed to chemical agents
Not sure what filament to choose?

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Where to buy

Check the list of our local and online distributors.

Verify Your Spool

Check the course of diameter on the entire length of the spool, ovality, mean diameter and standard deviation for each manufactured spool individually.

Where to buy

Check the list of our local and online distributors.

A wide range of products

Wide portfolio consisting of over 50 filaments with a versatile range of properties and applications, divided into three segments: desktop easy-to-use, industrial grade and high performance.

High quality

Innovation, extrusion know-how and highest quality filaments are the pillars of Spectrum philosophy. Our team is working continously on the development of new materials and their applications.

European made

All filaments from our portfolio are in-house made. We use modern production lines equipped with non-standard solutions to obtain highest quality final product.

Professional technical support

Our qualified support team helps at every stage from material selection to the 3D printing process.

Not sure what filament to choose?



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