Today's medical plastics are used in a wide range of applications, from relatively simple plastics such as syringes, pipettes, petri dishes and measuring cups, to complex integrated medical devices such as insulin pens, dialyzers, and ultrasonic nebulizers. They are all made of plastic. Because it involves personal safety, medical plastics must strictly control the quality and strive to do "three highs", namely: high safety, high energy efficiency and high precision.
High security
Safety is the most basic requirement for medical plastic products, mainly because it is safe for the post-treatment of medical personnel, patients and products. Need to comprehensive considerations from product design, raw material selection, production process and processing production process, production environment, product quality technical indicators. When plastics are used as medical materials, they should generally meet the following requirements: no toxicity to the body, no carcinogenicity, no allergic reaction or interference with the body's immune mechanism; materials implanted in the body should have good biocompatibility; materials in contact with blood should Has a certain anticoagulant properties; can withstand the sterilization process without deformation and so on.
PVC is currently the most widely used polymer in the medical industry, but it may release phthalates, which may cause potential harm to human health. TPU is considered a safer alternative. First, the bio-performance, mechanical properties, and processing properties of TPU are comparable to those of PVC, and there is no need for plasticizers to achieve flexibility, so there is no risk of phthalate migration. In addition, the TPU has sufficient stiffness before being inserted into the human body, and the flexibility of entering the human body ensures that the patient feels comfortable. However, medical grade TPU is expensive, and is currently mainly used in high value-added precision interventional catheters, artificial heart assist devices, artificial blood vessels, and the like.
In addition to strict requirements on the production materials, medical plastic products have strict requirements on processing equipment. In particular, medical products such as test, test, container, and organ that have special requirements for the use of the environment must use a clean room during molding. Many processing equipment suppliers have developed many solutions for this purpose. For example, Netstal has developed special rules and production procedures for the design and production of medical injection molding machines. It has set up a separate clean room injection molding machine production area, which is used for injection molding of clean rooms by specially trained personnel. The machine is assembled.
High energy efficiency
In an era of rapid change, energy efficiency is the goal pursued by all businesses. In general, medical product manufacturers require processing equipment to produce the best quality products with the highest equipment stability and safety under the shortest possible cycle conditions. Therefore, automation and system integration solutions have become the focus of attention.
High precision
High precision is also a key requirement for medical plastic products. For example, syringes and pipettes require high cross-section accuracy for fillets and through-holes, while culture vessels require high dimensional accuracy; while inhalers, insulin pens, etc. are complex and can be specific The assembly of multiple precision components such as storage, atomization and metering requires a high degree of precision and interaction between the plastic structural members. Moreover, under the pressure of the market, today's medical devices tend to be smaller and more multifunctional. Therefore, these products require more stable processing systems and more precise control.
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