| abstract |
A short fiber of from 0.1 to 1.0 inches in length having a modulus of less than 1x1011 dynes/cm2, preferably less than 0.6x1011 dynes/cm2. Preferably the fiber is a polyamide having a birefringence value of from 0.02 to 0.04. Elastomeric compositions containing the short fiber exhibit improved fatigue resistance, lower heat generation upon cyclic straining and improved modulus. The compositions are particularly useful in compositions further comprising from 25 to 175 phr of fillers such as carbon black and silicon dioxide. Useful articles which contain the composition include tires, hose, power transmission belts, conveyor belts, and various mechanical goods. |