PETG

Overview

PETG (Polyethylene Terephthalate Glycol) bridges the gap between the ease of PLA and the toughness of ABS. It offers excellent impact resistance, chemical resistance, and a slight flexibility that prevents brittle failure — all while being nearly as easy to print as PLA.

Key Properties

PETG has good tensile strength (50 MPa), superior impact resistance compared to PLA, and a heat deflection temperature of around 70°C. It’s FDA-approved for food contact in its raw form.

Advantages

• Excellent impact and chemical resistance
• Good layer adhesion — strong between layers
• Slight flexibility prevents snapping
• Food-safe (in raw form)
• Recyclable and low odour during printing

Limitations

• Can string during printing, slightly rougher surface than PLA
• Moderate heat resistance — not suitable for high-temp applications
• Scratches more easily than ABS
• Limited colour selection compared to PLA

Common Applications

Functional prototypes, mechanical parts, food-contact containers, protective covers, water-resistant housings, medical device prototypes, and packaging prototypes.