Polylactic Acid (PLA) Pellet Storage Tank Selection

Storing Polylactic Acid? Start Here

Polylactic Acid (PLA) is a popular bio-based plastic often used in compostable food packaging and 3D printing. It comes in pellet form and is sensitive to moisture and temperature. Proper storage is crucial to maintain its quality, especially since it can degrade quickly if exposed to too much moisture or heat. Whether you're a plant manager or a farmer, understanding how to store PLA correctly will help you avoid costly material degradation.

Can you store it in a poly tank?

Yes, PLA pellets can be stored in high-density polyethylene (HDPE) or cross-linked polyethylene (XLPE) tanks, especially for outdoor silos. However, ensure the tank has a static-dissipative liner and a desiccant breather to manage moisture. For indoor storage, polypropylene tanks are suitable, particularly for food-contact applications.

Watch Out for Moisture and Heat

PLA is highly sensitive to moisture, which can lead to rapid degradation during processing. It's essential to keep the pellets dry and below 50°C to prevent them from softening and sticking together. Use dehumidified vents and insulated tanks, especially in warmer climates, to maintain optimal storage conditions.

The safety that actually matters

• Keep PLA pellets dry to prevent degradation.
• Ensure tanks have static-dissipative liners to avoid static discharge.
• Use desiccant breathers to manage moisture levels.
• Insulate tanks if ambient temperatures exceed 50°C.

Common questions

Can I use galvanized steel tanks for PLA storage?

No, galvanized steel can cause zinc contamination and is not suitable for PLA storage.

What gasket material should I use?

EPDM gaskets are standard for ambient conditions, while Viton is recommended for high-temperature applications.

Do I need to worry about static discharge?

Yes, ensure your storage system includes static-dissipative features to prevent static discharge.