Disposable plastic lunch boxes are one of the main fast food boxes currently on the market. According to the difference of ingredients, they can be divided into foamed plastic lunch boxes and PP plastic lunch boxes.
The disposable foamed plastic lunch box is made of polystyrene resin. It is heated and melted at a high temperature in an extruder, and then a foaming agent (butane) is added to extrude the sheet. After the sheet is rolled up, it is ventilated and humidified. Various lunch boxes are made by placing them in a healthy environment and then performing secondary heating and blister molding. It is widely used because of its advantages of heat preservation, pressure resistance and low cost. But because of the irreversible damage to the environment, the term “white pollution” once became a hot topic. The harm of disposable foam lunch boxes is that when the temperature of the food in the foam plastic lunch box exceeds 65 degrees, toxic substances such as bisphenol A will be released. Bisphenol A is an organic chemical raw material that is not easily decomposed by the digestive system and can easily cause bodily harm.
The PP plastic lunch box is made of polypropylene, which has good heat resistance and will not release toxic substances when the temperature of the food is too high, provided that the material used is food-grade PP material. If the PP plastic used has a strong smell, it is an inferior product and may be toxic. The lunch box made of pp material is generally transparent, non-toxic and harmless, and it is often seen on disposable fast food boxes.
