What are the advantages and disadvantages of polyurethane bearings?

Advantages of polyurethane bearings:
Polyurethane bearings have good resilience, so they are often called polyurethane rubbers, or polyurethane elastomers. In addition, they have good toughness, tear resistance and excellent wear resistance.
Polyurethane bearings have a wide range of hardness, high strength and a large adjustable range of performance. A number of physical and mechanical performance indicators can be changed within a certain range through the selection of raw materials and the adjustment of formulas, so as to meet the different requirements of users for product performance

polyurethane bearings are wear-resistant and oil-resistant. The oil resistance of polyurethane bearings elastomer is not lower than that of nitrile rubber, which is equivalent to polysulfide rubber, has excellent ozone resistance, shock absorption, radiation resistance and air permeability. Diverse processing methods and wide applicability.

Disadvantages of polyurethane bearings:

　　 Polyurethane bearings generate a lot of internal heat, and have general high temperature resistance, especially poor heat and humidity resistance. The normal operating temperature range is -40~120℃. If long-term effects are required under high-frequency oscillation conditions or high-temperature conditions, corresponding modification measures must be taken in the structural design or formulation.

　　Polyurethane bearings are not resistant to strong polar solvents and strong acid and alkali media. At a certain temperature, alcohol, acid, and ketone will swell and degrade the polyurethane elastomer. Solvents such as chloroform, dichloromethane, dimethylformamide, trichloroethylene will swell the polyurethane elastomer at room temperature.

The difference between polyurethane and rubber is that rubber is more elastic than polyurethane, but rubber will melt after being oxidized for a long time, while polyurethane will turn yellow after a long time.

The existence of polyurethane is reasonable. If it is used on casters, it is obvious to choose polyurethane bearings. If the amount is large, we can process and produce it for you. I am a professional manufacturer of polyurethane bearings.

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