Low Spinnability of Sericin Dominates the Forcibly Spinning Speed

Forcibly spinning was applied to fully grown larvae of domestic Bombyx mori silkworm and the tensile properties of as-spun fibers were investigated. Tensile strength could be gained by elevating the spinning speed. However, it could not reach the level of naturally spun one. Forcibly spinning may be convenient to produce a finer filament. However, its applicability is limited due to the low spinnability of non-liquid crystalline sericin.