Medical silica gel is a widely used material with many forms, such as: liquid silica gel oil, jelly-like silica gel, foam silica gel sponge and elastic solid silica gel. At present, solid silicone rubber is widely used. Today, xiaobian to say what is the definition of medical silica gel material?
Silica gel has a good biocompatibility, no irritation to human tissues, no toxicity, no allergic reaction, and very few rejection reactions. Has good physical and chemical characteristics, can keep the original elasticity and softness in the contact process with body fluids and tissues without being degraded, is a rather stable inert substance, can resist high temperature, can also be sterilized, is convenient to process and shape, is easy to carve shapes, and is convenient to use.
The research and development and application of medical silicone products in China began in 1960s, but a large number of basic research and product trial-production work were carried out only after 1970s. Especially in recent decades, great progress has been made in the research of medical silica gel as a biocompatible material, and many functional and serialized medical silica gel products have been put into clinical application.
Medical silicone materials also have the characteristics of temperature resistance, with the temperature resistance ranging from -40℃ to 200℃. When exposed to moisture and water or when the temperature rises, the change is small. Even if the silicon dioxide generated by short-circuit combustion is still an insulator, this ensures that the electrical equipment will continue to work, so it is most suitable for making wires, cables and lead wires.
Therefore, medical silicone materials have good physiological stability, can withstand repeated harsh and disinfection conditions, and have excellent resilience, small permanent deformation, ozone resistance, ultraviolet resistance, radiation resistance and so on; Special silica gel has oil resistance.