Standard PET can become brittle at very low temperatures (below -10°C), leading to cracking during handling or stacking. Cold chain-grade PET is formulated with special additives and processing techniques to maintain flexibility and toughness at -20°C to 60°C, making it suitable for deep-freeze storage and cross-continental shipping.
Key features of cold chain PET fruit boxes:
1. Low-temperature toughness: no cracking at -18°C.
2. Anti-fog coating: clear visibility in humid cold environments.
3. Reinforced corners & ribs: improved stackability and impact resistance.
4. Ventilation balance: prevents condensation while allowing airflow.
5. Food safety stability: no migration or odor at extreme temperatures.
For exporters shipping fruits like cherries, blueberries, and grapes from Southern Hemisphere to Northern Hemisphere markets, cold chain PET boxes reduce damage rates significantly. Logistics companies report that poor packaging is responsible for 30–40% of transit damage in fresh fruit shipments; upgrading to cold chain PET can cut this by half.
In 2026, more PET packaging manufacturers are offering “cold chain certified” product lines, tested under simulated long-haul conditions. These boxes are also ideal for domestic cold delivery services and supermarket refrigerated sections.
