Overview of the hottest medical plastics and their

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Overview of medical plastics and their products (2)

at present, countries all over the world pay more and more attention to the research of biomedical materials. According to the statistical analysis of Lowell University in Massachusetts, the annual consumption value of medical polymer products is $3.1 billion, more than 90% of medical plastics are used to manufacture in vitro medical products. The specific consumption ratio is: low density polyethylene 22%, polyvinyl chloride 20%, polystyrene 20%, high density polyethylene 12%, polypropylene 10%, thermosetting polyester 4%, polyurethane 2%, acrylate 2%, nylon 2%, Epoxy resin 1%. At the same time, polyaldehyde, cellulose, thermoplastic polyester, polycarbonate, polysulfone, polyphenylene oxide, silicone, urea formaldehyde resin, etc. account for 5%. Among them, polyurethane and silicone rubber are mainly used to make high value-added medical supplies that can be implanted into the body and come into contact with blood if we measure this signal directly, while disposable supplies made of plasticized polyvinyl chloride are also widely used in clinic

it can be seen that at present, the plastic materials used in medical products are mainly polyolefins. Among them, polyethylene, polypropylene, polystyrene and ABS have been widely used in medical plastic products because of their wide range of materials, low price and stable performance. Field rock mass shear strength experiments are usually carried out in adits

polyvinyl chloride (PVC) is a commonly used material for manufacturing medical catheters. Because the melting point of PVC is very close to the decomposition temperature, and its glass transition temperature is high, the material hardness is large, and it is difficult to process and shape, plasticizers and other additives are generally added to PVC resin to reduce its melting point and glass transition temperature and improve the flexibility of the material

a recent study showed that some PVC catheters, especially some interventional catheters, have poor biocompatibility. Generally, the main factors affecting biocompatibility are the migration of plasticizers and the toxicity of dissolved substances. The amount of migration and dissolution mainly depends on the formula and preparation process, in which the selection of plasticizers is particularly important. For this reason, polyurethane materials are mostly used to manufacture interventional catheters in foreign countries at present. In China, because medical polyurethane materials are difficult to buy in the market and can only be imported from abroad, most domestic catheters are made of PVC materials, and their product performance and quality cannot be compared with imported products

according to the data, the annual consumption of medical PVC pellets in China is 40000 ~ 50000 tons, which is mainly used in various pipeline products such as infusion (blood) devices, and the annual growth rate is about 10%. At present, there are more than 10 enterprises specializing in the production of medical PVC pellets in China, excluding the PVC pellet production enterprises produced and used by themselves

polyurethane (PU) is the general term of polyether, polyester and diisocyanate addition products. At present, PU, especially used in medical catheters and human organs, is a kind of polyether polyurethane. This material has good extensibility and warpage resistance under low stress load. Its resilience, fatigue resistance and water resistance are very good. Coupled with its blood compatibility, it is widely used in interventional catheters. At present, this material is under development in China and has not been popularized and applied

in the past 10 years, medical polymer materials and their products have maintained an annual growth rate of about 20%, and their development trend can be compared with that of information industry and automobile industry. With the rapid growth of people's demand for medical polymer materials and products (for example, the annual growth rate of the demand for artificial joints in China is as high as 30%, much higher than 4% in the United States), biomedical materials and products will also develop more rapidly

medical plastic products

medical plastic products are used in various fields of medical treatment. Different use requirements determine the diversification of product varieties with a diameter of about 82mm lattice. At present, there are thousands of kinds of medical plastic products abroad, such as more than 1600 kinds of medical plastic products produced by Portex company in the United States

many medical plastic products are formed into supporting and serialized products around one application field. For example, oxygenator in extracardiac surgery needs to be used together with blood circuit, filter, blood reservoir, intubation, manometric tube, perfusion device and other medical plastic products. For this reason, many manufacturers take series products in a certain field as their representative products

at present, there are hundreds of varieties and thousands of specifications of medical plastic products in China, but there are few products with high technical content and high added value. Compared with similar foreign products, but the polishing speed is low, the quality is poor, and the price is only equivalent to 1/3 ~ 1/5 of imported products

at present, there are nearly 400 registered manufacturers of blood transfusion (liquid) devices, syringes and general medical plastic products in China, while there are only more than 20 registered manufacturers of oxygenators, dialyzers and interventional catheters, as shown in Table 2

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