The application of PVC and PE in medical field
常用的医用塑料的材料大约有十几种，聚乙烯（PE）、聚丙烯（PP）、聚氯乙烯（PVC）、聚氨酯（PU）、聚四氟乙烯（PTFE）、聚碳酸酯（PC）、聚苯乙烯(PS)等, PVC和PE用量最大，各占28%和24%；PS占18%；PP占16%；工程塑料占14%。
There are about a dozen kinds of medical plastic materials that commonly used in medical field, Polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyurethane (PU), polytetrafluoroethylene (PTFE), polycarbonate (PC), polystyrene (PS), etc., with the largest amounts of PVC and PE, accounting for 28% and 24% respectively; PS accounts for 18%; PP accounts for 16%; Engineering plastics accounted for 14%.
一、PVC是一种低成本的无定型塑料，具有优良的耐化学品性和抗微生物性。据市场估计，PVC占据医用塑料市场的28%。优点是PVC树脂的成本较低、应用范围广阔、及其易加工。而缺点是，PVC作为极性材料对某些药物有吸附作用，且增塑剂DEHP可能析出危害人体。
PVC is a low-cost amorphous plastic with excellent chemical resistance and microbial resistance. According to market estimates, PVC accounts for 28% of the medical plastic market. The advantages of PVC resin are low cost, wide application range and easy processing. The disadvantage is that PVC, as a polar material, can adsorb some drugs, and the plasticizer DEHP may precipitate and harm human body.
医学应用的PVC产品有：血袋、血液透析管路、呼吸面罩、吸氧管、尿袋、人工耳鼻等。
PVC products used in medicine include: blood bags, hemodialysis pipes, breathing masks, oxygen tubes, urine bags, artificial ear and nose, etc.
二、PE是产量最大的通用塑料，具有加工性能良好、成本低、无毒无味、生物相容性良好等优点。普通PE通常可用于药瓶、针帽、注射器推杆、输液器流量调节器、输液器和注射器的包装袋等。
PE is the general plastic with the largest output. It has the advantages of good processing performance, low cost, non-toxic and tasteless, and good biocompatibility. Ordinary PE can usually be used for medicine bottles, needle caps, syringe push rods, flow regulators of infusion sets, packaging bags of infusion sets and syringes, etc.
UHMWPE（超高分子量聚乙烯）是特种工程塑料，具有高抗冲性、耐磨性强（塑料之冠）、摩擦系数小、生物惰性和较好的吸能特性，其耐化学药品性可与PTFE媲美，是人造臀、人工关节的理想材料。
UHMWPE (ultra high molecular weight polyethylene) is a special engineering plastic with high impact resistance, strong wear resistance (the crown of plastics), low friction coefficient, biological inertia and good energy absorption characteristics. Its chemical resistance is comparable to PTFE, and it is an ideal material for artificial hips and artificial joints.
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