왕겨섬유의 물성에 미치는 물리적 개질 영향

The changes in the properties of the rice husk fibers by the mechanical treatment were evaluated in order to increase the usability of the rice husk fiber as an alternative wood fiber. The additional mechanical treatment of the flake fraction after the rice husk digestion resulted in the increase of the rice husk fiber portion. The fibers obtained by the additional treatments of the flake fraction showed no significant difference between the rice husk fibers directly originated from the rice husk digestion. The mechanical treatment of the rice husk fibers with PFI mill showed the bigger decrease in the freeness than those of softwood unbleached fibers treated with same method. The larger changes in the shape such as fiber length, fiber width and fine contents were found in the rice husk fiber than those in the softwood unbleached fibers. Especially, the lower level of mechanical treatment such as 5,000 revolution of PFI mill resulted in the significant changes of rice husk fiber properties unlike softwood fibers. Those results showed the rice husk fibers were more susceptible to the mechanical treatment such as refining process.