How to identify the raw materials of rubber sealing rings

Sealing rings are applied in various industries, including machinery, hydraulic, pneumatic, etc., with different shapes and materials. How to distinguish the quality of materials among so many sealing rings (mechanical sealing rings, hydraulic sealing rings, CR sealing rings, rubber sealing rings, etc.)?
The natural rubber we usually refer to is a solid substance made from natural latex collected from rubber trees and processed through processes such as coagulation and drying. Natural rubber has high elasticity and slight plasticity at room temperature, with excellent mechanical strength, small hysteresis loss, and low heat generation during repeated deformation. Therefore, its resistance to bending is also good. Moreover, due to its opposite polarity rubber, its electrical insulation function is outstanding.
Varieties of raw materials for rubber sealing rings
1. According to the appearance and shape of rubber
Rubber can be divided into four categories: solid rubber (also known as dry rubber), emulsion rubber (abbreviated as latex), liquid rubber, and powder rubber.
2. According to the origin and method of raw materials
Rubber can be divided into two categories: natural rubber and synthetic rubber. During this period, natural rubber accounts for one-third of the consumption, while synthetic rubber accounts for two-thirds.
3. Based on the physical shape of rubber
Rubber can be divided into hard rubber and soft rubber, raw rubber and mixed rubber, etc.
4. Based on the function and use of rubber
In addition to natural rubber, synthetic rubber can be divided into general synthetic rubber, semi general synthetic rubber, synthetic rubber, and special synthetic rubber.
5. According to rubber in industrial use
It can be divided into ordinary rubber, heat-resistant rubber, oil resistant rubber, weather aging resistant rubber, special chemical medium resistant rubber, etc.