Processing apparatus for highly viscous fluids

A processing apparatus for a high viscosity fluid for the production of materials of treating the solid / liquid type, which performs a treatment of mixing and kneading, kneading or dispersion treatment materials of a high viscosity fluid preliminarily mixing and kneading having a viscosity within a range of 10 to 2500 dPa · s without using any dispersion medium, which apparatus comprises a container (1) having a supply opening (3) and a discharge opening (4) treatment materials, rotary body (2) rotatably disposed in the container (1), and a thin annular gap (10) formed between the inner face of the container (1) and the outer peripheral face of the rotary body (2 ) for the passage of the treatment materials, while subject to treatment by the rotary body (2), wherein the rotary body has a surface on which are formed a notch s (13); characterized in that the rotary body (2) has a tubular shape on which are arranged recessed portions (11) at intervals in a circumferential direction on the outer peripheral face to form similar projections teeth (12) extending in a longitudinal direction, and the notches (13) are formed on the outer peripheral face of the teeth-like projections (12) by a knurling process; and the surface of the rotary body (2) has a rate of 1.05 to 2.35 roughness, said roughness rate ratio between the projected area on one side of the effective or apparent surface area and the surface horizontal.