Patent ID: 7182552

Claim:
A method for delivering a fine particle dispersion to minimize stagnation, deposition or clogging comprising: arranging a microflow-channel such that a discharge section is positioned below an inlet section in a gravitational direction; setting an angle of the microflow-channel extending from the inlet section to the discharge section within a range of 0° to 45° relative to the gravitational direction; introducing a fine particle dispersion into the inlet secton; and delivering the introduced fine particle dispersion to the discharge section by a liquid medium in a laminar flow state; wherein the fine particle dispersion comprises fine particles which are dispersed in the liquid medium, the fine particles having a volume-average particle size within a range of 0.1 to 1000 μm and a specific gravity of the fine particles within a range of 1.01 to 21.00 times that of the liquid medium such that stagnation, deposition or clogging is minimized.