Thermoplastic Polyurethane (TPU) Pellet Storage Tank Selection

Storing Thermoplastic Polyurethane? Start Here

Thermoplastic Polyurethane (TPU) is a versatile material used in a variety of applications, from footwear to medical devices. When storing TPU, it's important to keep it dry and free from contaminants. TPU pellets are typically stored in bulk silos or day-bins before being processed. The key is to prevent moisture absorption, which can lead to defects during processing. Proper storage ensures TPU maintains its quality and performance.

Can you store it in a poly tank?

Yes, TPU pellets can be stored in polyethylene tanks, particularly HDPE or XLPE, for outdoor silos. However, it's crucial to use a static-dissipative liner and a desiccant breather to control moisture and static electricity. For indoor day-bins, polypropylene tanks are suitable, especially when food-contact-grade materials are required.

Moisture Control is Key

TPU is hygroscopic, meaning it can absorb moisture from the air. This can cause issues like foaming during processing. To prevent this, ensure TPU is stored in conditions that keep it dry, ideally using desiccant breathers and dehumidified vents.

The safety that actually matters

• Use static-dissipative liners to prevent static buildup.
• Ensure all gaskets match manufacturer guidelines to avoid contamination.
• Keep TPU dry to prevent processing defects.

Common questions

Can TPU be stored outdoors?

Yes, but use HDPE or XLPE tanks with weather protection and moisture control features.

What gaskets should I use?

EPDM gaskets are standard, but silicone or Viton are preferred for food or medical-grade applications.

Is stainless steel necessary for TPU storage?

Not for general storage, but it's recommended for medical-grade applications to maintain purity.