Masterbatch Shelf Life and Storage FAQ: How Long Does It Last?

How Long Does Masterbatch Last?

Masterbatch is stable when stored correctly, but improper storage can cause moisture absorption, color shift, and processing problems. This FAQ explains shelf life and proper storage.

What is the shelf life of masterbatch?

Most masterbatch has a 12–24 month shelf life when stored properly. Some moisture-sensitive grades (PET, PA) have shorter recommended storage periods.

How should masterbatch be stored?

Store in a dry, cool place at 15–30°C, away from direct sunlight and moisture. Keep bags sealed until use, and reseal opened bags to prevent moisture absorption.

Does masterbatch absorb moisture?

Yes, masterbatch can absorb moisture, especially PET, PA, and carbon black grades. Moisture causes processing problems like splay, bubbles, and hydrolytic degradation.

What happens if masterbatch gets damp?

Damp masterbatch can cause surface defects, bubbles, and — for PET and PA — hydrolytic degradation that reduces mechanical properties. Pre-dry moisture-affected masterbatch before use.

How can I tell if masterbatch has degraded?

Signs of degradation include color shift, clumping, visible moisture, or a change in pellet appearance. If in doubt, test a small batch before full production.

Should I dry masterbatch before use?

For most polyolefin masterbatch, drying is not required if stored correctly. For PET, PA, and engineering-resin masterbatch, pre-drying to below 0.02% moisture is recommended.

Can I use expired masterbatch?

Masterbatch past its shelf life may still be usable if stored correctly and it shows no signs of degradation. Test color and processing before committing to production.

Conclusion

Proper storage extends masterbatch shelf life and ensures consistent processing. MHK Color packages masterbatch in moisture-resistant bags and provides storage guidance with every shipment. Contact us if you have questions about a specific grade's storage requirements.