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Cork Rubber
basic information
heat:
Cork rubber is a kind of polymer rubber compound material made by mixing NBR and cork powder with both of their advantages such as aging resistance, anti-hydrolysis, compression resistance, high oil resistance and excellent elasticity. SHIRE cork rubber has following advantages.
1. Excellent anti-vibration
Cork rubber structure is similar like sponged rubber that its volume will change under pressure and recover without pressure, which has a good anti-vibration function.
2. Excellent oil resistance and aging resistance
Cork powder can improve the oil resistance and aging resistance of rubber. Its weight change is less than 1% after immersed in 120℃ transformer oil for 168h. And aging factor is less than 0.9 after aging in 100℃ hot air for 24h.
3. Excellent elasticity
Cork cell can release air under pressure and absorb air without pressure. It can recover 85% of original thickness for a certain time and has good elasticity after long time compression.
DATA SHEET
|
Item |
Control Value |
|
Hardness(Shore A) |
70±10 |
|
Tensile Strength, MPa |
＞ 2.0 |
|
Elongation at break, % |
＞ 70 |
|
Hot Air Compression Set, % |
＜ 55.0 |
|
25# Transformer Oil Immersed Compression Set, % |
＜ 80.0 |
|
Compressibility, % |
20±5 |
|
Elasticity, % |
＞ 75 |
|
Brittle Temperature, ℃ |
≤ -40 |
|
25# Transformer Oil Immersed Volume Change, % |
0~10.0 |
|
25# Transformer Oil Immersed Hardness Change |
-8.0~2.0 |
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