Patent ID: 6964182

Claim:
A treatment apparatus for chemical modification of animal fibers of a continuous web form, comprising: a tank filled with an aqueous treatment liquid; a net coveyor which has a pair of mesh belts composed of an upper mesh belt and a lower mesh belt and which conveys the continuous web form through the aqueous treatment liquid in the tank, with the pair of mesh belts overlapping each other in a state in which the pair of mesh belts sandwich the continuous web form therebetween for holding the continuous web form; a treatment liquid circulation system having: a gas-liquid mixing pump which includes an inlet connected to a suction port provided in the tank and which includes an outlet for supplying the aqueous treatment liquid into the tank; a static mixer which is connected downstream of the outlet of the gas-liquid mixing pump; and a discharge nozzle which is provided opposite the suction port in the tank with respect to the pair of mesh belts, in which the discharge nozzle is connected downstream of the static mixer; and an ozonizer for supplying ozone gas to the treatment liquid circulation system, wherein the animal fibers of the continuous web form are continuously treated with the ozone gas, by mixing the aqueous treatment liquid supplied from the gas-liquid mixing pump with the ozone gas supplied from the ozonizer by the static mixer into dispersing the ozone gas as fine gas bubbles thereof in the aqueous treatment liquid uniformly, by discharging the aqueous treatment liquid containing the fine gas bubbles thereof toward the pair of mesh belts from the discharge nozzle, and by sucking the aqueous treatment liquid containing the fine gas bubbles thereof from the suction port.