Kupopera mbewu mankhwalawa ufa, komwe kumadziwikanso kuti kupaka ufa, ndi njira yatsopano yokutira yomwe idapangidwa mwachangu m'zaka zaposachedwa.Zomwe zimagwiritsidwa ntchito ndi ufa wa pulasitiki.❖ kuyanika akhoza ❖ kuyanika wandiweyani, monga ❖ kuyanika 100 ~ 300μm, ndi ambiri zosungunulira ❖ kuyanika, pafupifupi 4 ~ 6 zina, ndi ❖ kuyanika ufa kamodzi akhoza kukwaniritsa makulidwe.Chophimbacho chimakhala ndi kukana bwino kwa dzimbiri.The ❖ kuyanika ufa alibe zosungunulira, ndipo alibe kuipitsa zinyalala zitatu.Kugwiritsa ntchito ufa electrostatic kupopera mbewu mankhwalawa ndi njira zina zatsopano, dzuwa mkulu, oyenera basi ❖ kuyanika mzere;Mlingo wapamwamba wogwiritsa ntchito ufa, wosinthikanso.