In the medical industry, polyvinyl chloride (PVC), with good flexibility, chemical stability and low cost, is widely used for infusion bags, blood transfusion bags and various medical catheters, as well as medical gloves and mattresses.Polypropylene (PP), being non-toxic, heat-resistant and easy to process, is often applied to syringes, infusion bottle stoppers, medical masks, surgical instrument boxes and some disposable medical supplies.Polycarbonate (PC), noted for its high strength and high transparency, can be used to make medical equipment housings like those of glucometers and ultrasound machines, and is also suitable for medical goggles and protective face shields.Polystyrene (PS), characterized by light weight, insulation and easy molding, can be used for petri dishes, test containers and vaccine bottle stoppers, facilitating microbial culture and sample testing.