With the continuous development of industrial technology, the sealing gasket, as a kind of sealing element, is more and more widely used in various industries. Gaskets can be divided into two categories: silicone gaskets and rubber gaskets. So which of these two gaskets is better? This paper will compare and analyze the performance, application fields, advantages and disadvantages of silicone gaskets and rubber gaskets to help you make a more intelligent choice.
First, the performance of silicone gasket and rubber gasket comparison
1. Material performance
Silicone gasket is mainly made of silicone rubber, with excellent high and low temperature resistance, electrical insulation properties, chemical stability and biocompatibility. The silicone gasket can maintain good elasticity and sealing performance in the temperature range of -40℃~250℃. Rubber gasket is mainly made of rubber, its high and low temperature resistance is relatively poor, generally used in the temperature range of -40 ° C ~120 ° C.
2. Mechanical properties
The silicone gasket has high tensile strength, tear strength and wear resistance, which can effectively ensure the sealing performance of the sealing part. The mechanical properties of rubber gaskets are relatively poor, especially in high pressure and high strength sealing occasions, which are prone to tear and deformation.
3. Chemical resistance
The silicone gasket has excellent chemical resistance and can resist the erosion of most chemical substances, which is suitable for the sealing needs of chemical, pharmaceutical and other industries. The chemical resistance of the rubber gasket is relatively poor, and the resistance to some strong acids, strong alkalis and other chemical substances is weak.
Second, the application of silicone gasket and rubber gasket comparison
1. Silicone gasket application field
Silicone gaskets are widely used in electronics, electrical appliances, communications, automotive, medical equipment, aerospace and other industries, especially in high temperature, high pressure, high vacuum, chemical corrosion and other special environment sealing needs.
2. Rubber gasket application field
Rubber gaskets are mainly used in the sealing needs of general industrial fields, such as the sealing of pipes, valves, pumps and other equipment. Rubber gasket has good sealing performance in low speed, low temperature, low pressure and other ordinary working conditions.
Third, the advantages and disadvantages of silicone gasket and rubber gasket
1. Advantages of silicone gasket
a. Good high and low temperature resistance, wide range of application;
b. Excellent electrical insulation performance, suitable for electronic and electrical industries;
c. Good chemical stability, strong resistance to chemical erosion;
d. Good biocompatibility, suitable for medical devices, food and other industries.
Cons:
a. The tensile strength and tear strength are relatively low;
b. The price is relatively high and the cost is high.
2. Advantages of rubber gasket
a. High tensile strength and tear strength;
b. Relatively low price, cost economy;
c. Wide range of application, strong versatility.
Cons:
a. Poor high and low temperature resistance;
b. Poor chemical resistance, easy to be corroded by chemical substances;
c. The electrical insulation performance is relatively poor.
In summary, silicone gaskets and rubber gaskets have advantages and disadvantages. In practical applications, the more suitable gasket should be selected according to the working conditions of the sealing part, the use environment and the cost budget.