Recycled plastic is now a $46 billion global market, with demand growing across packaging, textiles, automotive, and construction. But one challenge remains: storage. Studies show that recycled plastic pellets can absorb up to 0.5% of their weight in moisture during improper storage, which may reduce tensile strength by 20–30% in final products. For exporters, contamination or poor storage conditions can lower resale value by 10–15%. Here’s how businesses can protect their recycled plastic investments.
1. Choose the Right Storage Environment
- Keep relative humidity below 50%.
- Use raised pallets to prevent ground moisture infiltration.
- For long-term storage, maintain a stable temperature (15–25°C).
2. Use Proper Packaging
- Moisture-proof FIBC bags with PE inner liners reduce moisture absorption by 70% compared to open storage.
- Vacuum-sealed packaging is preferred for export markets.
- For food-contact grade rPET, sealed 25kg bags are industry standard.
3. Monitor Moisture Levels
Target moisture content:
- PET pellets: below 0.005% before extrusion
- Nylon pellets: below 0.2%
- Use moisture analyzers (Karl Fischer titration or infrared testing) to verify.
4. Plan for Long-Term Storage
- Adopt FIFO (First In, First Out) to minimize degradation.
- Label with batch numbers, resin type, and storage date.
- With proper storage, recycled pellets can maintain quality for 6–12 months.
Proper storage of recycled plastics is not just about space management—it directly affects product quality, compliance, and profit margins. By controlling humidity, packaging, and contamination risks, recyclers and manufacturers can reduce losses, maintain certification standards, and secure better market prices.
FAQ
1. Why does recycled plastic absorb moisture so easily?
Because of its molecular structure and processing history, recycled plastic often has higher surface area and micro-cracks that allow moisture absorption.
2. What’s the best packaging for recycled plastic pellets?
Moisture-proof FIBC bags with inner liners or vacuum-sealed packaging are the most effective options.
3. Can wet recycled plastic still be used?
Yes, but it must be dried using industrial dryers before processing to avoid defects in the final product.
4. How long can recycled plastic pellets be stored?
If kept in dry, sealed packaging under proper conditions, they can be stored for 6–12 months without quality loss.
5. Should different types of recycled plastic be stored together?
No, mixing grades or colors can lead to contamination and reduce resale value. Always store separately.