Can PP lunch boxes still be used after ten years of use

If there is no obvious aging or deformation after ten years of use, PP lunch boxes can generally continue to be used. PP material is resistant to high temperatures and has strong chemical stability, but long-term use may result in wear, discoloration, or material degradation. It is recommended to check whether the lunch box has cracks, deformations, or odors to avoid affecting food safety due to material aging. PP plastic has good durability under normal use conditions and does not release harmful substances when used in daily food packaging. If there are scratches or fogging on the inner wall of the lunch box, it may increase the risk of bacterial growth and needs to be cleaned or replaced. During high-temperature disinfection, it is necessary to confirm that the number in the triangular label at the bottom of the lunch box is 5 to ensure that the material can withstand high temperatures. If the lunch box has been used to hold oily food for a long time or has undergone repeated microwave heating, it may accelerate material oxidation. Observe whether the sealing of the edge of the lunch box has decreased. Deformed lunch boxes may cause food leakage or uneven microwave heating. PP tableware used by children for more than five years is recommended to be replaced regularly, as children are more sensitive to trace chemicals. Reasonable use of PP lunch boxes can extend their lifespan and avoid using steel wire balls to scrub or coming into contact with strong acid and alkali cleaning agents. When storing, avoid direct sunlight and high temperature environment, and regularly check the material condition. When the lunch box becomes noticeably brittle, emits a plastic smell, or has severe staining, it should be replaced promptly to ensure food safety.