I. Temperature Resistance Performance in Different Temperature Ranges
1. Low-temperature Resistance Range: -50°C to Room Temperature
In low-temperature environments, POF shrink film does not become brittle like PVC and can maintain good flexibility and impact resistance. Even in a freezing environment of -50°C (such as in frozen food warehouses or cold chain transportation), its packaging structure remains stable and does not crack or delaminate due to low temperatures. It is suitable for long-term packaging of products such as frozen dumplings and frozen meats.
2. High-temperature Resistance Range: Room Temperature to 120°C
In high-temperature scenarios, POF shrink film can withstand temperatures up to 120°C for short periods without melting, deforming, or releasing harmful substances. This characteristic makes it suitable for pasteurization processes (typically at 60°C to 85°C), commonly used in the packaging of cooked foods and dairy products that require low-temperature sterilization. It can also handle the high temperatures of summer outdoor transportation (generally not exceeding 60°C), preventing the packaging from softening and failing due to high temperatures.
II. Precautions
Due to differences in formulations (such as the material ratio of co-extruded layers) and production processes among different manufacturers, the actual temperature resistance values of POF shrink film may vary by ±5°C. It is recommended to refer to the product test report for accurate information.
120°C is the short-term resistance temperature (usually within 30 minutes). If exposed to temperatures above 120°C for a long time, it may still cause the film to age and affect packaging performance.
