The material of the moon cake tray mainly includes PP (polypropylene), PS (polystyrene), PVC (polyvinyl chloride), PET (polyethylene terephthalate) and BOPS (biaxially oriented polystyrene).

PP (Polypropylene): The moon cake tray made of PP is widely used in food and medicine packaging, including moon cake packaging, because of its translucent frosted, soft and tough, high temperature and 120 resistance, cold and cold resistance, non-toxic and tasteless. The moon cake tray made of PP material is not only environmentally friendly, but also safe and non-toxic, suitable for direct contact with food.

PS (Polystyrene): The moon cake tray made of PS is also a common choice because of its low cost, light weight, not easy to damage, and diverse styles. However, the environmental protection of PS material is relatively poor, which may have a certain impact on the environment.

PVC (polyvinyl chloride): Although the hardness of the moon cake tray made of PVC is strong, it is brittle and has poor stability to light and heat. Therefore, although the PVC material can be used as a moon cake tray in some cases, its use is limited.

PET (polyethylene terephthalate): The moon cake tray made of PET has the characteristics of hard texture, good toughness, high strength, bright surface, anti-penetration, weather resistance, and good stability of chemical products. However, PET material is not resistant to hot water immersion and alkali, these characteristics limit its use in some environments.

BOPS (biaxially oriented polystyrene): The moon cake tray made of BOPS belongs to a new type of polymer environmental protection material, with strong hardness but relatively brittle. Although environmentally friendly, its brittleness may affect its durability.

To sum up, when choosing the material of the moon cake tray, we should consider its environmental protection, safety and impact on food. PP material is a safe choice for making food containers because of its non-toxic, tasteless, high temperature resistance, cold resistance and freezing resistance. However, depending on different needs and preferences, other materials such as PS, PVC, PET and BOPS are also used to some extent, although they have their own advantages and disadvantages.