What is PCTG, and how does it compare with PETG?

PCTG is a polyester filament, in the same family as PETG, with its own print temperatures and its own test table. How to print PETG, PLA versus PETG, and chemical resistance already cover the polyester most people mean. Food contact for any of these plastics is food contact.

Fiberlogy's page, read 27 October 2026

The Fiberlogy PCTG page lists a printing temperature of 250–270 °C (482–518 °F), a bed of 90 °C (194 °F), and bed surfaces of smooth PEI plus adhesive, textured PEI, or glass plus adhesive. Drying is 60 °C (140 °F) for 4 hours. An enclosed chamber is not required. Airflow is 0–25 percent. Density is 1.23 g/cm³.

Heat deflection is 76 °C (169 °F) at 0.45 MPa and 64 °C (147 °F) at 1.8 MPa, ISO 75. A separate line says the filament keeps its properties at temperatures up to 76 °C (169 °F). That 76 °C (169 °F) matches the lighter-load heat-deflection result. The heavier-load result on the same page is 64 °C (147 °F).

Tensile strength, ISO 527, is 43 MPa at yield and 45 MPa at break. Elongation is 4 percent at yield and 220 percent at break. Flexural strength, ISO 178, is 60 MPa, and the bending modulus is 1600 MPa. Notched Izod impact, ISO 180, at 23 °C (73 °F), is 92 kJ/m².

The page also says impact resistance is up to 20 times that of PETG, and that impact tests give approximately 90 kJ/m² against a PETG figure of 5–8 kJ/m² in the notched Izod test. The 5–8 figure is Fiberlogy's comparison sentence. It is not the PolyLite PETG datasheet. The specification table says 92 kJ/m², while the comparison sentence says approximately 90. Both lines stay.

The catalog row, Open Filament Database verified 13 October 2026, stores 230–260 °C (446–500 °F) and a bed of 70–90 °C (158–194 °F). That is not the product-page band. AzureFilm PCTG stores a single nozzle of 250 °C (482 °F) and a bed of 80 °C (176 °F) from the same database and date.

Against PolyLite PETG, same test only

PolyLite PETG, checked 21 October 2026, is 78 °C (172 °F) at 0.45 MPa and 75 °C (167 °F) at 1.8 MPa, ISO 75. Fiberlogy PCTG is 76 °C (169 °F) and 64 °C (147 °F) on those loads. On this bending test, against this PETG, the PCTG numbers are not higher. PolyLite PETG's row does not store an Izod result, so Fiberlogy's 92 kJ/m² is not subtracted from a Polymaker impact number.

The page says chemical resistance is high and suitable for industrial environments. It does not give a chemical, a concentration, or a time. Chemical resistance is where that table is refused. The page says the material does not contain BPA, and that food-contact approval applies to the PCTG Pure TR version only. That asterisk is not extended to the other colors.

What the community says

a Reddit thread in r/3Dprinting says pure nylon will creep, and names eSUN ePA-CF, Fiberlogy PCTG, and Extrudr ASA CF as filaments that person enjoyed.

a Reddit thread in r/BambuLab says Fiberlogy claims a printing speed under 100 mm/s for PCTG.

a Reddit thread in r/BambuLab says PCTG always releases from the bed.

Questions