Sorbothane

Sorbothane is a proprietry, visco-elastic polymer. Visco – elastic means that a material exhibits properties of both liquids and solids.

Technical Data



Material Properties of Sorbothane
Property   Durometer (Shore 00)    
  30 50 70 Units
Tensile Strength at break 5.87 8.64 14.52 kg/cm₃
Elongation at break 8.82 568 399 %
Tensile Elastic stress at 100% strain 1.26 1.79 4.66 kg/cm₃
Tensile Elastic stress at 200% strain 2.56 3.86 8.95 kg/cm₃
Tensile Elastic stress at 300% strain 3.87 5.65 11.69 kg/cm₃
Compressive stress at 20% 0.45 0.85 2.11 kg/cm₃
Compressive stress at 50% 6.07 7.4 16.34 kg/cm₃
Tear Strength 7.81 8.72 11.69 kg/cm₃
Bulk Modulus   2.86   gPascal
Static Coefficient of Friction 15.8 10.4 4.1  
Kinetic Coefficient of Friction 3.3 2.6 2.5  
Density 1.368 1.36 1.358 gm/cc
Specific Gravity 1.372 1.364 1.363  
Optimum Performance Temperature Range* -15 to 98 °C
Glass Transtion -38.7 -37.4 -34.7 °C
Flash Ignaition Flammability   317   °C
Self Ignaition Flammability   417   °C
Flammability Rating with Flame Retarded Added** V2 V2 V2  
Resilience Test Rebound Height 2 11 22 %
Resilience Test Rebound Height*** 16 18 25 %
Dielectric Strength 241 256 261 v/mil
Dynamic Youngs Modulus at 5 Hertz 6.34 7.4 8.45 kg/cm₃
Dynamic Youngs Modulus at 15 Hertz 9.51 10.67 11.41 kg/cm₃
Dynamic Youngs Modulus at 30 Hertz 13.1 14.79 16.7 kg/cm₃
Dynamic Youngs Modulus at 50 Hertz 17.33 19.02 21.14 kg/cm₃
Tangent Delta at 5 Hertz excitation 0.3 0.56 0.56  
Tangent Delta at 15 Hertz excitation 0.38 0.58 0.6  
Tangent Delta at 30 Hertz excitation 0.45 0.57 0.59  
Tangent Delta at 50 Hertz excitation 0.35 0.5 0.55  
Bacterial Resistance   No Growth    
Fungal Resistance   No Growth    
Heat Aging   Stable    
Ultraviolet   Good    
Ozone Can Be compounded for resistance    
Chemical Resistance to Hydraulic Fluid   -1.4   %
Chemical Resistance to Kerosene   4.3   %
Chemical Resistance to Diesel   6.4   %
Chemical Resistance to Soap Solution   5   %
Acoustic Properties: Transmission in air   greater than 40 ^   dec/cm
* Reduced strength and damping upto 120⁰C. Incresed spring rate down to glass trasition temp
** Underwriters Laboratory 94 Compatibility
***Modified for the effects of material tack
^At 50 hertz. Transmission loss increases with frequency