Disposable fast food boxes have changed from foam lunch boxes to environment-friendly lunch boxes. The original foam lunch boxes have been eliminated due to their high temperature resistance and environmental damage caused by the manufacturing process. Plastic lunch boxes, paper lunch boxes, wooden lunch boxes, degradable lunch boxes, etc. are available. Among them, plastic has the characteristics of low toxicity, high melting point, strong plasticity, simple production and low relative cost, so it has become the mainstream material for manufacturing disposable fast food boxes.

So what should we pay attention to when using disposable lunch boxes?

1. Pay attention to the use temperature of different material lunch boxes. The use temperature of the PP lunch box is high, and it can hold hot food. The food box made of PS is hard and easy to crack. It begins to become soft when the temperature reaches 75 ℃. The food should be cooled to room temperature before being put into the PS food box. Try not to heat the food together in the microwave oven. Its low temperature performance is very good, and it is suitable for holding refrigerated food.

2. Different food ingredients have requirements for the lunch box. Food with high fat and sugar content is not suitable for packing in the lunch box, because the boiling point of oil is easy to exceed the heat resistance limit of plastic, while the oil, sugar and plasticizer in the food are organic substances, which may react with the lunch box according to the principle of similar solubility, and have potential hazards to public health and food safety.