PE and PVC cling film are the most common cling film on the market. These two types of cling film are not resistant to high temperatures and will produce toxic substances when heated. The PVDC cling film is a high-temperature-resistant plastic wrap, so no toxic substances will be produced after heating.
PE and PVC, these two materials are mainly used for food packaging, the film we usually buy for fruits and vegetables
PVDC, mainly used for the packaging of some cooked food, ham and other products

The cling film has moderate oxygen permeability and moisture permeability. It can adjust the content of oxygen and moisture around the fresh-keeping products, and block dust, thereby prolonging the fresh-keeping period of food. Therefore, it is necessary to choose different cling film for different foods.
When heating oily food, keep the cling film away from the food. Do not make direct contact between the two. Because when the food is heated, the food oil may reach a very high temperature, causing damage to the cling film and sticking to the food.
When heating food, cover the container with cling film, and then use a toothpick or other needle-shaped object to pierce a few small holes in the cling film to facilitate the evaporation of water and prevent the cling film from bursting due to gas expansion.