After testing over a hundred types of cling film, we uncovered a little secret hidden within them.

There are actually many types of cling film available on the market—some are designed for refrigerator use, while others are safe for microwave heating. Though they all go by the same name, "cling film," their materials, heat resistance, and safety levels vary significantly.

Currently, the cling films available for purchase are mainly divided into Made from PE (polyethylene), PVC (polyvinyl chloride), PVDC (polyvinylidene chloride), and PMP (polymethylpentene) materials. These four.

When it comes to heat resistance, PE material has a melting point of 110°C, PVC reaches 130°C, PVDC stands at 140°C, and PMP can withstand up to 180°C. This makes PVDC and PMP more suitable for microwave use. However, if you plan to leave items in the microwave for extended periods, it’s still recommended to use PMP-based cling film. That’s because even if this material burns completely, it only produces carbon dioxide and water—neither of which will affect the food itself.

Also, Try to avoid using PVC-based cling film. This type of cling film is the cheapest, yet it’s also the most likely to pose safety concerns. PVC contains vinyl chloride monomer (VCM), a substance classified as a known human carcinogen—specifically, a Group 1 carcinogen. While purchasing PVC cling film through legitimate channels is generally safe under normal conditions, you should still avoid contact with foods that contain oils or alcohol, as plasticizers in PVC can dissolve into these substances.

Another important point is that PVC material starts to decompose at around 50 degrees Celsius, releasing harmful substances like hydrogen chloride. Therefore, it’s crucial to avoid exposing it to high temperatures.

      When choosing cling film, PE material is the safest option, while PVDC material provides the longest shelf life for cooked foods. It’s best to avoid purchasing PVC-based cling film altogether. . But no matter which type of cling film it is, It's not recommended to let foods high in fat come into direct contact with each other. Therefore, it's best to replace food wrapped in plastic wrap purchased from the supermarket as soon as you get home, to avoid potential food safety issues.