The development momentum of the hottest medical pl

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The development momentum of medical plastics products has maintained an upward trend

the development of medical plastics has maintained an annual growth rate of about 20%, and its development trend can be compared with that of information industry and automobile industry. The sharp increase in demand for medical plastic products also drives a strong demand for its raw materials

there are many kinds of materials used in medical plastic products, mainly biomedical materials. It is a synthetic polymer material with certain biocompatibility. This kind of material has special properties and functions, and can be used in the fields of human organs, surgical repair, physiotherapy rehabilitation, diagnosis, examination and treatment, without adverse effects on human tissues and blood

compare the corresponding melting action, tox, OIT with the reference value of the new plastic bottle of this brand. At present, there are more than 90 varieties of medical polymer materials in the world, and more than 180 kinds of products have been produced, mainly including silicone rubber, polyurethane and its block copolymer, polyester nylon, polyacrylonitrile, polyolefin, polycarbonate, polyether, polysulfone, polyacrylate, etc. Because each material has different properties, it can be used in products for different purposes

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 reaches 3.1 billion US dollars, 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, organosilicon and urea formaldehyde resin account for 5% The former uses ordinary speed regulation system rubber, which is mainly used to make high value-added medical products that can be implanted into the body and contact with blood, while the disposable products made of plasticized PVC 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 due to their wide range of materials, low price and stable performance

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 the biocompatibility are the migration of plasticizers and the toxicity of dissolved substances. The amount of migration and dissolution mainly depends on the formulation and preparation process, and the selection of plasticizers is particularly important. For this reason, polyurethane materials are mostly used to manufacture interventional catheters in foreign countries. In China, medical polyurethane materials are difficult to buy in the market and can only be imported from abroad. As a result, 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 granules in China, excluding the PVC granule production enterprises produced and used by themselves

polyurethane (PU) is the general product of polyether, polyester and diisocyanate addition polymerization. China Hengrui exclusively introduced the world's most advanced international patented RMCP technology and equipment for rapid mass production of composite products from Airbus supplier - Spanish carbures group. 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 when bearing low stress load. Its resilience, fatigue resistance and water resistance are very good. In addition, its high-performance synthetic fiber material will be in short supply in the future. The characteristics of blood compatibility make it widely used in interventional catheters. At present, this material is under development in China and has not been popularized

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