Jiangyin Film-maker produces PETG resin and PLA resin, recently it has become a popular material for the 3D printing industry.Today, let's compare the differences between PETG and PLA as 3D printing filaments.

1. Key differences between PLA and PETG filaments
Material composition

Renewable resources such as sugarcane, potato, or corn starch are used as raw materials in making PLA on the other hand ethylene glycol and terephthalic acid are used as raw materials for PETG.
Printing temperature and settings

The risk of warping is minimal when printing with PLA due to its lower printing temperature which usually ranges from 180-220°C. PETG is prone to oozing and stringing because of its high print temperature ranging from 220-250°C.
Strength and durability

Although PLA provides decent strength, the filament can be brittle. PETG is preferred because of its strength, and durability sourced from ethylene glycol and terephthalic.
Flexibility and impact resistance

PETG is great for printing functional parts due to its excellent impact resistance and flexibility whilst PLA is rather less flexible and rigid.
Surface finish and post-processing requirements

PLA comes with vibrant colors creating shiny prints and requires little post-processing. PETG needs proper post-processing techniques like sanding to smooth the exterior of the print.
Environmental considerations

PLA is eco-friendly because it uses sustainable resources as raw materials thus it is biodegradable under the right conditions. On the contrary, PETG is non-biodegradable though it is recyclable. So, if we consider the environmental impact, PLA no doubt is a better option.

2. Choosing between PLA and PETG
Factors to consider when selecting filament for 3D printing projects

.  Toughness

.  Durability

.  Chemical Resistance

.  Appearance

.  Impact Resistance
.  Environmental Impact

3. Comparison of PLA and PETG based on specific printing requirements

If your designs are simple, made for short-term use, and quick disposal, PLA would be the right choice. PLA doesn’t warp easily, prints at lower temperatures, good for details and easy to print with.
PETG is a little challenging because of its higher temperature requirement. So, this might not be the option you should go for as a newbie.
But if you want to print applications that are strong and durable, and demand better structural integrity and resilience, such as functional parts, PETG is the right alternative. The filament is good for printing translucent and intricate models.

4. How to Store PLA and PETG Filaments: Proven Tips to Keep Moisture Away

When it comes to 3D printing, nothing can ruin your print quality faster than moisture. PLA and PETG are popular for their ease of use and versatility, but both are hygroscopic—they absorb water from the air. Without proper filament storage, even the best-quality spools can suffer from PLA moisture problems, leading to poor print quality, wasted material, and frustration.
Airtight Storage Solutions

The simplest way is to store your spools in airtight containers. Resealable plastic bags with silica gel packs are effective for short-term use. Vacuum-sealed bags offer even better protection for long-term filament storage.

Desiccants & Humidity Monitoring

Silica gel packs actively absorb moisture from the air inside your storage container. Color-changing silica packs are useful because they indicate when they’ve reached saturation. A small digital hygrometer in your filament storage area can help you maintain humidity below 20% for optimal results.
Dry Cabinets and Climate-Controlled Storage

Dry cabinets are the gold standard for filament storage. These cabinets are designed to keep humidity at a constant low level and often allow you to feed filament directly into your printer without removing it from the cabinet. While more expensive, they virtually eliminate PLA moisture problems for those who print frequently.
Vacuum-Sealed Storage for Long-Term Preservation

If you have multiple spools in rotation, vacuum sealing is an affordable and highly effective long-term solution. Removing air and sealing the spool with desiccants inside ensures your filament stays in perfect condition until you’re ready to use it.

 5. Why PLA and PETG Are Eco-Friendly Choices for 3D Printing

.  Eco-Friendly Source (PLA): Made from renewable resources like corn starch or sugarcane, resulting in a lower carbon footprint.

.  Recyclable Material (PETG): Can be produced from recycled plastics and reused multiple times without major quality loss.

.  Low Energy Consumption: Both materials require less energy during extrusion and printing due to moderate melting temperatures.

.  Overall Sustainability: Compared to petroleum-based plastics, PLA and PETG offer a more sustainable, environmentally responsible choice.

 6.Why PLA and PETG Are Cost-Efficient Choices for 3D Printing

.  Lower Material Costs: PLA is inexpensive due to abundant renewable sources; PETG, though slightly higher, remains affordable for its durability.

.  Energy Savings: Both materials print at moderate temperatures, reducing electricity use during extrusion and printing.

.  Less Waste: PETG’s strong mechanical performance and PLA’s easy printability minimize failed prints and rework.

.  Reduced Labor: PETG requires less post-processing, saving time and effort.

.  Better ROI: PLA is ideal for low-stress parts, while PETG offers long-term savings for durable applications.