A spectral analysis of the deformation properties of polymeric filaments is performed to obtain a physical interpretation for methods which employ systems analysis and entail computational prediction of the nonlinear hereditary creep of amorphous-crystalline filaments under non-destructive mechanical loads. Spectral modeling of the filaments’ deformation properties is done on the basis of the classic generalized Kelvin-Voigt-Meyer model. The normalized memory function which is chosen is interpreted as an integral function that describes particle distribution on the logarithmic scale of lag time. Such a physical interpretation of the memory function is useful for comparatively analyzing the deformation properties of polymer filaments. This article is a continuation of the research that was begun in [1].