PETG

PETG combines the ease of printing of PLA with the durability of ABS: 1) Compared to PLA: PETG offers better toughness, impact resistance, and heat resistance with a heat deflection temperature of 71°C; 2) Compared to ABS: PETG is easier to print, requires no heated chamber, has low shrinkage and less warping, plus better transparency; 3) Applications: Ideal for parts requiring toughness, chemical resistance, and clarity. Selection advice: Choose PLA for rigidity and ease of printing; ABS for heat resistance and strength; PETG for toughness, chemical resistance, and transparency.

Key parameters for PETG printing: 1) Drying: 70-80°C for 6-8 hours before printing to avoid bubbles and stringing; 2) Nozzle temperature: 230-260°C, too low causes poor layer adhesion, too high causes degradation; 3) Print speed: recommended <200mm/s; 4) Retraction: 2-5mm distance at 25-45mm/s; 5) Bed temperature: 70-90°C with spray adhesive or PVP glue stick; 6) Cooling fan: enable moderate cooling to improve overhangs and surface quality.

PETG offers good transparency with visible light transmittance over 90%, making it ideal for transparent enclosures, lamp covers, and display pieces. Post-processing options: 1) Support removal with diagonal cutters or craft knives; 2) Surface finishing with fine sandpaper (400-1000 grit) followed by polishing paste; 3) Annealing at 70-80°C for 30-60 minutes to improve dimensional stability and heat resistance, though transparency may decrease; 4) Bonding with PETG-specific adhesive or cyanoacrylate glue.

PETG has excellent chemical resistance to oils, weak acids, weak alkalis, and alcohols. Thermal properties: 1) Vicat softening temperature: 69°C; 2) Heat deflection temperature (0.45MPa): 71°C; 3) Glass transition temperature: approximately 80°C. PETG is more heat resistant than PLA but less than ABS and engineering plastics, suitable for functional parts and enclosures in moderate temperature environments.

PETG has some moisture absorption with a saturation rate of about 0.45% (25°C, 55%RH). Storage recommendations: 1) Unopened: store in a dry, cool place away from direct sunlight; 2) Opened: keep in sealed bags or dry boxes with desiccant; 3) Before printing: dry at 70-80°C for 6-8 hours to fully remove moisture and prevent bubbles, stringing, and rough surfaces.

PETG is suitable for various functional parts: 1) Functional prototypes combining strength and toughness; 2) Packaging containers with high transparency and chemical resistance; 3) Medical models with good biocompatibility; 4) Transparent display pieces such as lamp covers and display boxes; 5) Industrial accessories like protective covers, enclosures, and fixtures; 6) Consumer goods including phone cases, eyeglass frames, and toys.