PE cling wrap is a type of plastic film used to wrap food items to keep them fresh and to prevent spoilage. The food stretch of PE cling wrap refers to its ability to conform and cling tightly to food surfaces, effectively sealing them and preventing air and moisture from entering or escaping.
The stretchability of PE cling wrap depends on a few factors, including the thickness of the film, its composition, and the manufacturing process used to produce it. The film must be thin enough to be stretchable, yet strong enough to maintain its shape and prevent tearing.
One way to increase the food stretch of PE cling wrap is to add a plasticizer, which is a chemical compound that improves the flexibility and stretchability of the film. Plasticizers such as diisononyl phthalate (DINP) or dioctyl phthalate (DOP) are commonly used in the production of PE cling wrap to improve its stretchability and make it easier to handle and use.
Another factor that can affect the food stretch of PE cling wrap is its temperature. When the film is warmed by the heat of the hands, it becomes more pliable and easier to stretch, allowing it to conform tightly to the shape of the food item. In addition, some types of PE cling wrap are designed to be microwave safe, which allows them to be used for cooking and reheating food items, further improving their food stretch properties.