Ga yawancin halitta tsire-tsire fiber (kamar itace, bamboo, gona straw, da dai sauransu), za a iya amfani da fitar da albarkatun kasa inganci, dole ne a wuce gilashi, mill, surscreening, bushewa, haɗuwa da sauran pre-processing tsari. Don inganta lalacewa da rashin dacewa guda daya kayan a lokacin extrusion tsari. Don dacewa extruded fiber grain size ya dace, sa'an nan kuma kara da dacewa adadin launi, lubricants, coupling agent ko kumfa agent da sauran mataimaki, a cikin high-gudun hadawa na'ura za a iya cikakken haɗuwa da kuma kara kawar da ruwa don cimma dacewa extrusion bukatun.