Polyvinyl chloride (PVC) materials are widely used in the medical device industry. The essence is that PVC materials themselves have good physical properties. PVC is also an alternative material for disposable sterile medical devices. Affected by the new coronavirus epidemic and the shortage of medical supplies, the upstream PVC market has also been affected to a certain extent. The physical properties of polyvinyl chloride (PVC) materials include: the ease of manufacturing PVC materials, and the good compatibility between certain materials and intravenous (intravenous) injection fluids and blood. PVC products commonly used in medical care contain dihexyl phthalate (DEHP) plasticizer. The function of neighborhood dihexyl ester is to increase the elasticity of PVC products. Dehp, as one of the most cost-effective and widely used plasticizers, its function is to make PVC soft and flexible.