No matter under dry or wet thermal conditions,the increasing of temperature accelerates the orientation of the fibers;the sonic orientation factors of both two monocomponent fibers and PET/PTT b.

• 无论是在干热还是湿热条件下,温度升高均加速纤维的解取向,各单组分纤维和PET/PTT双组分长丝的声速取向因子均降低,尤其是双组分长丝的声速取向因子迅速降低。