Safe. Pvc sheet refers to polyvinyl chloride, which is yellowish, translucent and shiny. Transparency is better than polyethylene and polypropylene, but worse than polystyrene. The clarity is also very clear. With the different dosage of additives, it can be divided into soft PVC and hard PVC. Soft-packed products are soft and tough and sticky to the touch. The hardness of hard products is higher than that of low density polyethylene, but lower than that of polypropylene, and whitening will occur at the bending point.