Abstract
In this study, we derived theoretical equations on the restoration of dynamic modulus in a free state, after breaking the physical bonds by stressing along the principal axis of sloped eight layered nylon fiber filled FRR, that has a matrix of carbon black filled NR, modeling the restorative process of broken physical bonds. Restorative activation energies of broken physical bonds have a constant value independent from the amount of broken physical bonds. The matrix phase changes to stable structure by vibrative energy, and, restored physical bonds and restored dynamic moduli are smaller than those for initial states.