1998 Volume 35 Issue 4 Pages 265-270
[Correction] J. Soc. Powder Technolo, Japan Vol.35 No.7 (1998) pp.543g-543g
[Correction] J. Soc. Powder Technolo, Japan Vol.35 No.6 (1998) pp.475-475
The mixing process of fibrous materials (aramid fiber) and fine powders (calcium carbonate) has been investigated by using an agitator type of mixer.
To evaluate the dispersion state of the fiber, the change in the sample volume with compressing time under a constant loading condition and the change in the volume with a variable loading weight were measured by using a simple piston-cylinder type of equipment. Two characteristic values, the bulk density ρ0 (the interpolated value of the bulk density in the free packing condition) and the corresponding rate constant κ (reaching the final packing state) were adopted to consider the phenomena in the process. It was found that two values were useful to discuss the relationship between the degree of the unraveling state of the fiber in the mixture and the operating conditions of the mixer.
