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Application features of PU oil seal

Update:2018-11-30

Its rotary oil seal (dynamic seal) or automobile (shaft motion seal) are all due to the different requirements of the use conditions, determine the properties and requirements of rubber sealing materials for oil seals. DSH Seals shares with you, the commonly used rubber seal material including nitrile rubber, acrylate rubber and fluoro rubber, in addition, we can also choose polyurethane, silicone rubber, hydrogenated nitrile rubber, PTFE and other commonly used rubber sealing materials in the industry! The following focuses on the performance and characteristics of PU oil seals.

First, Polyurethane (PU; polyurethane)

1. What are the performance characteristics of the oil seal made of polyurethane?

The oil seal (seal) made of PU has the advantage of a polymer having a urethane segment repeating structural unit made by reacting isocyanate with polyalcohol. Polyurethane elastomer is a kind of ordinary rubber sealing material. The high-molecular polymer between the hard plastic and the plastic has high strength, rubber elasticity and toughness, which makes up for some shortcomings in the performance of general rubber sealing materials and plastic sealing materials.

2. What are the disadvantages of the oil seal made of urethane rubber?

The oil seal (seal) made of urethane rubber has the disadvantages of easy hydrolysis, water vapor, hot water, strong acid and alkali hydrolysis, poor physical and mechanical properties, slow heat dissipation, and easy accumulation of heat.

3. What kind of industry can the polyurethane rubber seal be applied to (in which mechanical equipment or environment)?

Polyurethane rubber oil seal (polyurethane elastomer) is one of the important rubber sealing materials in hydraulic transmission and control systems. It is also used in sealing rings and gaskets (gaskets, seals, oil seals) in machinery, automotive and other fields. 

In the concrete mechanical hydraulic sealing system is one of the typical cases, is the key rubber sealing material in the development of many new sealing technologies (sealing structure), rubber and plastic combination sealing will be based on its characteristics, will use polyurethane instead of PTFE of.