It points out that the principle of hacking is low speed,centrifugal force is the key for separating,and roller type comber should be adopted,which causes little damage to apocynum fiber.

• 指出开松的原则是“低速度、慢开松、小密度”;分离的关键是离心力的大小,必须考虑终末速度和腾空速度;梳理成形则应采用完全罗拉式梳理,对麻纤维损伤小。