Noise Damping Greases

“Noise damping greases” (English: Noise Damping Greases or Noise Reduction Greases) are lubricants specially formulated to reduce unwanted sounds such as vibration, chirping, squeaking, and knocking between friction surfaces in mechanical systems. These greases are especially used in areas such as automotive, electronics, appliances, and industrial mechanisms.

Below is a summary of the content and features of noise damping greases:

Basic Content Components

1. Base Oil

   • Synthetic oils (e.g., PAO – polyalphaolefin, esters, or silicone oils) are generally preferred.

   • Provides low volatility, wide temperature range, and stability.

2. Thickener

   • It is the component that keeps the grease in semi-solid consistency.

   • Common types:

     • Lithium soap

     • Polyurea

     • PTFE (Polytetrafluoroethylene)

     • Bentonite (clay-based)

   • Polyurea and PTFE systems are especially suitable for quiet operation.

3. Additives

   • Friction modifiers (e.g., molybdenum disulfide – MoS₂, graphite, boron nitride)

   • Anti-wear (AW) and extreme pressure (EP) additives

   • Oxidation, rust, and corrosion inhibitors

   • Tackifiers (for viscosity modification and damping effect)

4. Sound Damping Polymers or Resins

   • In some special greases, viscoelastic polymer or resin is added, converting vibration energy into heat and thereby reducing sound.

 Key Features

• Suppresses vibration and mechanical resonance.

• Provides stable lubricant film even at low speeds.

• Long lifespan and low evaporation rate.

• Operates in a wide range of temperatures (e.g., -40 °C to +150 °C).

• Compatible formulations with plastics and elastomers are available.

Application Areas

• Automotive: Climate controls, seat tracks, pedal mechanisms, trim parts

• Appliances: Door hinges, knobs, motor bearings

• Electronic devices: Potentiometers, gear mechanisms

• Industry: Quiet running gears, valves, track systems