After the general plastics are synthesized, they are al […]
After the general plastics are synthesized, they are all flour-like powders coming out of the synthesis towers of large petrochemical plants, which cannot be used to directly produce products. This is what people often say that the components of fat extracted from tree sap are the same. Plastic medical mould Known as resin powder, this is a pure plastic with poor fluidity, low thermal stability, easy aging and decomposition, and not resistant to environmental aging.
In order to improve the above defects, heat stabilizers, anti-aging agents, anti-ultraviolet agents, plasticizers, etc. are added to the resin powder. After granulation modification, its fluidity is increased, and the resin powder is produced to adapt to various processing techniques. Plastic varieties with special properties and different grades. Therefore, there are many grades of the same type of plastic. According to the processing method, there are injection molding grade, extrusion grade, and blown film grade; according to performance, there are high rigidity, toughened, etc. .
The plastic materials commonly used by medical device manufacturers are plastic particles that can be used directly after modification. For products with special properties that are not available in the market, equipment factories can introduce granulation production lines and process and produce plastic granules through different formulation designs.
Since it is in contact with the liquid medicine or the human body, the basic requirements of medical plastics are chemical stability and biological safety. In simple terms, the components in the plastic material cannot be precipitated into the liquid medicine or the human body, will not cause toxicity and damage to the tissues and organs, and are non-toxic and harmless to the human body. In order to ensure the biological safety of medical plastics, medical plastics usually sold on the market are certified and tested by medical authorities, and users are clearly informed which grades are medical grade.
According to the structure and strength requirements of the equipment products, we choose the appropriate plastic type and the appropriate brand, and determine the material processing technology. These properties include processing performance, mechanical strength, use cost, assembly method, sterilization and so on. The processing properties and physical and chemical properties of several commonly used medical plastics are now introduced.