Why Do Medical Devices Choose Silicone Rubber?

In the past 20 years, silicone rubber products have been continuously updated, with more than 1,000 varieties and brands, mainly used in high-tech, heavy-duty automotive, transportation, leisure, medical and other fields.

Ⅰ. The characteristics of silicone rubber products used in medical treatment

Among the many synthetic rubbers, silicone rubber is one of the best. It is non-toxic, tasteless, resistant to high temperature and severe cold. At 300℃ and -90℃, it still maintains certain strength and elasticity.

Silicone rubber also has good electrical insulation, oxygen ageing resistance, light ageing resistance, mildew resistance, and chemical stability. Due to these excellent properties, silicone rubber has been widely used in modern medicine.

Ⅱ. What are the silicone rubbers for medical devices? What are the advantages?

1. Key components of medical machinery

These products including artificial knuckles, artificial breast capsules, soft tissue expander capsules, knee membranes, heart valves, pump tubes, bellows, penile prostheses, artificial skull coatings and other products that require high physical properties, should be made by silicone rubber molding process compound with high strength, high tear resistance, high fixed elongation, low deformation and good flexibility.

2. Intraperitoneal chemotherapy drug delivery device

An all-silicone implantable intraperitoneal chemotherapy catheter system. The device uses medical silicone rubber as raw material and is composed of a catheter of a medicine storage box.

3. Medical electrodes (plates)

Due to the contact with the human body, the material is required to be soft, comfortable, physiologically inert, non-toxic to the human body, non-irritating to the skin, and good in air permeability.

4. Biosensor

Biosensors have not only shown bright prospects in basic research, clinical medicine, food fermentation, environmental protection, etc., but also have become possible in vivo applications. Among them, two kinds of biosensors-biomedical electrodes and implanted sensors are more typical examples of in vivo applications. The biosensor for transplantation usually needs a layer of packaging material to isolate the surrounding physiological environment. Therefore, higher requirements are put forward for the reliability, durability, and biocompatibility of the material.

The silicone rubber layer outside the electrode can be very thin, allowing water and other small molecules to pass freely. This silicone rubber can be used as the outer packaging of a glucose-sensitive electrode to monitor and adjust the glucose level in the blood of diabetic patients.

Medical silicone rubber has been widely used in life sciences, medical devices, medicines, and other fields, and has huge potential. With the development of life sciences and the research of biological materials, it will make greater contributions to human society.

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