- Seals are materials or parts that prevent fluids or solid particles from leaking from adjacent joint surfaces and prevent foreign impurities such as dust and moisture from intruding into the internal parts of the machine and equipment. The storage room temperature of the seals is best to be below 30 degrees Celsius to avoid sealing High temperature aging phenomenon of parts;
- Seals are usually made of elastic natural rubber or synthetic rubber. Synthetic rubber is cured by a combination of various chemical ingredients. The ingredients generally fall into the following categories: polymers, inert fillers, reinforcing agents, catalysts, anti-degradants , Plasticizers, process aids to promote forming. Selecting the characteristic combination of ingredients and the ratio can be made into synthetic rubber materials suitable for various specific engineering applications.
- Now let's make some classification and summary of the characteristics of the rubber materials used to make seals:
1. Resilience: the best is natural rubber;
2. Tensile strength: natural rubber and polyurethane rubber have high tensile strength;
3. Compression and permanent deformation resistance: urethane polyurethane ester, silicone, fluorocarbon rubber are better;
4. Corrosion resistance: natural rubber, styrene butadiene, propylene ethylene, neoprene, nitrile, and polyurethane rubber have excellent corrosion resistance;
5. Cold and heat resistance: best propylene ethylene, silicone and fluorosilicone rubber;
6. Acid resistance: fluorocarbon rubber is the best, polyacrylate and polyurethane rubber are poor in acid resistance;
7. Oil resistance: polyacrylate, nitrile, and fluorocarbon rubber have excellent oil resistance.