Is PETG more brittle than PLA?

In the realm of 3D printing, there exists a myriad of filament choices that fans utilize. Yet, there’s a notable drift towards embracing PLA or PETG. My inner tech geek, Carolina, propelled me to unravel: does PETG truly surpass PLA in robustness? Let me dive into this riveting quest and bestow upon you the findings.


Undoubtedly, PETG outshines PLA when it’s about tensile durability. With enhanced resilience, impact resistance, and flexibility, PETG proudly stands as a top contender in the 3D printing arena. What’s more, its prowess in heat-tolerance and UV-defense makes it superior for open-air applications, emphasizing its might.

Stay tuned as I delve deeper into the contrasting strengths of PLA and PETG, along with their distinguishing features.

How Robust is PLA?
3D printing enthusiasts employ a diverse range of filaments. In the process of filament selection, several attributes like resilience, thermal endurance, and impact protection become paramount. Surveying the choices of fellow 3D printing enthusiasts, it’s evident that PLA reigns supreme. It’s lauded not just for its might but also for its hassle-free printing attributes. Unlike its counterpart ABS, PLA exhibits minimal warping and mandates no special procedures—just the right warmth, an impeccable initial layer, and a consistent flow rate. Considering PLA’s tensile robustness, it boasts a rating of 7,250, effortlessly sustaining a TV from a bracket sans any deformation or breakage. Yet, it’s worth noting that PLA’s heat-endurance is modest. While it may deteriorate under prolonged exposure to sunlight, it’s primarily the hues that fade. Over an extended timeframe, this could lead to reduced strength. Renowned as a readily accessible and cost-effective thermoplastic, PLA is undeniably among the most rigid 3D printing filaments. However, this rigidity may render it susceptible to fractures.

How Formidable is PETG?
Making waves in the 3D printing sphere is PETG, a relatively modern filament. Its rise to fame is credited to several factors, strength being paramount. When we gaze at PETG’s tensile might, numbers might vary, but they predominantly hover around the 7000s. Many 3D printing enthusiasts vouch for PETG when their objective is crafting something exceptionally sturdy, especially for outdoor or functional applications. What’s enticing about PETG is its ability to endure bending, ensuring that a minor force or impact won’t compromise your masterpiece. Designed for superior resilience and impact protection, PETG excels in extreme environments. The enhancements in PETG fortify it against oil, grease, and UV rays, and it exhibits minimal contraction, perfect for intricate parts.

Is PETG Mightier than PLA?
Through exhaustive assessments, PETG has proven to be mightier than PLA on multiple fronts. Its superiority stems from its commendable flexibility, sturdiness, and heat tolerance. PETG demands more melting time compared to PLA. Yet, it adheres impeccably to the bed, ensuring that the print doesn’t detach, which simplifies the extrusion of the initial layer.

PLA Vs PETG – The Core Variances

Health Aspects of PLA & PETG
When safety is the priority, PLA holds the upper hand over PETG. Its organic roots ensure its transformation into harmless lactic acid. Contrarily, PETG, though safer than many like ABS or Nylon, doesn’t match up to PLA’s safety record. Yet, when scrutinized closely, both these filaments emerge as secure choices.

Printing Ease for PLA & PETG
Regarded as the novice’s go-to filament, PLA is celebrated for its user-friendly printing capabilities. Though PETG offers durability akin to ABS and shares PLA’s straightforward printing nature, meticulous setting adjustments, particularly in retraction, are essential.

Contraction Post-Cooling for PLA & PETG
Post-cooling, both PLA and PETG exhibit slight contraction, albeit significantly lower than other filament types. This minimal contraction ensures the precision of the created objects.

Food Safety of PLA & PETG
PLA and PETG both pass the food safety test. PLA’s origins in sugarcane and corn extracts deem it inherently organic and apt for food storage. 3D creations are typically designed for one-time use, considering the layered structure of the objects. Nonetheless, applying a food-safe epoxy can amplify their safety quotient. PETG’s resistance attributes further enhance its suitability for food storage, especially outdoors. However, when stringent comparisons are drawn, PLA holds a slight edge in terms of food safety.