What is claimed is:
1. A processing device comprising:
a fluffing section that fluffs fibers contained in a sheet-like material, the fibers being at least near a surface of the sheet-like material; and
a particle supplying section that supplies particles having Mohs hardness of 2 to 5 to the fluffed fibers.
2. The processing device according to claim 1 ,
wherein the particle supplying section has an ejecting portion that ejects the particles.
3. The processing device according to claim 1 ,
wherein the particles have a function of adsorbing alien substances contained in the sheet-like material.
4. The processing device according to claim 1 ,
wherein the particles have a function of colliding with alien substances contained in the sheet-like material to peel the alien substances off from the fibers.
5. The processing device according to claim 3 , further comprising an alien substance-removing section that removes the alien substances together with the particles from the sheet-like material.
6. The processing device according to claim 5 , further comprising a defibrating section that defibrates the sheet-like material in an aerial manner after the particles are supplied,
wherein the alien substance-removing section removes the alien substances and the particles before the defibration.
7. The processing device according to claim 5 , further comprising a defibrating section that defibrates the sheet-like material in an aerial manner after the particles are supplied,
wherein the alien substance-removing section removes the alien substances and the particles after the defibration.
8. The processing device according to claim 5 , further comprising an alien substance-aggregating section that is disposed between the particle supplying section and the alien substance-removing section and aggregates the alien substances.
9. The processing device according to claim 1 ,
wherein the particles are formed of a resin-based material.
10. The processing device according to claim 1 ,
wherein the particles are formed of a plant-based material.
11. The processing device according to claim 1 ,
wherein the fluffing section has a brush.
12. The processing device according to claim 11 ,
wherein the brush has a rotatably-supported cylindrical or columnar core portion, and brush bristles provided on an outer periphery of the core portion.
13. The processing device according to claim 1 ,
wherein the fluffing section has a plurality of claw portions.
14. A sheet manufacturing apparatus comprising the processing device according to claim 1 .
15. A processing method comprising:
fluffing fibers contained in a sheet-like material, the fibers being at least near a surface of the sheet-like material; and
supplying particles having Mohs hardness of 2 to 5 to the fluffed fibers.
16. A manufacturing method of a sheet, comprising:
fluffing fibers contained in a sheet-like material, the fibers being at least near a surface of the sheet-like material; and
supplying particles having Mohs hardness of 2 to 5 to the fluffed fibers,
wherein the sheet is manufactured from the sheet-like material after the particles are supplied.