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Why can TPE replace PVC?

Source:Dongguan Jiayang New Material Technology Co., Ltd  Time:2020-05-28  Keywords:

Why can TPE replace PVC? PVC material is one of the largest plastic products in the world, which is widely used in Asian medical device market. However, in recent years, with the improvement of China's comprehensive national strength and people's living standards, the import of PVC materials in China has gradually decreased, and TPE has been used in the medical field instead of PVC materials. Next, I would like to share some comparisons between PVC and TPE.

PVC is very harmful and TPE is a substitute

PVC has been eliminated in many other parts of the world because it is considered to be a potential safety risk material for medical devices.

First of all, during the production process, vinyl chloride will remain in the synthesis of PVC resin, which will also decompose into vinyl chloride during processing, leading to cancer, DEHP plasticizer and MEHP formed after hydrolysis have toxic side effects on liver and other organs. Secondly, when used, PVC will have adverse effects on the development of male reproductive system, especially for infants or pregnant women.

After use, it is how to deal with the problem of PVC materials. According to the regulations, medical devices are used to transport liquid medicine or blood. Medical devices such as catheters and medical bags must be incinerated after use. However, burning PVC will release hydrogen chloride (HCl), which can cause damage to the incinerator. In addition, polychlorinated dibenzo-dioxins (CDD) may be produced in the combustion process. These compounds contain 75 kinds of substances that can produce various harmful effects, which are released into the air, water and soil, and can enter the human body through these pathways. However, many studies have shown that dioxins have adverse effects on animal and human reproduction, development, immunity and endocrine.

Firstly, compared with PVC, TPE does not need plasticizer to obtain flexibility, so there is no risk of phthalic acid ester migrating from medical devices to liquid medicine or human body. Secondly, the structure of medical devices made by TPE is not only more durable, but also less likely to be damaged in frequently used hospital environment. Third, TPE is easy to be incinerated, and will not release corrosive substances and other dangerous chemicals produced when burning PVC.

Therefore, TPE has become a safer alternative material for PVC in medical device products because of its excellent biological flexibility, stability, physical and mechanical properties and processing properties. Under such market demand, TPE is widely used in medical fields such as medical packaging, liquid medicine and blood storage and infusion, various kinds of conduits, medical equipment accessories and other medical fields.