Time dependent deformation behaviour of mulberry and tasar silk

Abstract

Time dependent deformation has been observed for mulberry(Bombyx mori) and tasar (Antheraea mylitta) silk. In totalextension, the creep component for mulberry is found 5.5% andthat of tasar is 5%. Instantaneous extension and secondary creep isfound 5% and 7.5% for mulberry and 22.5% and 19% of tasarrespectively. Such a difference is ascribed to the intrinsic propertyof filament fineness and related structure of mulberry and tasar.