RESIN COLORING MASTER BATCH AND MANUFACTURING METHOD THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method of a resin coloring master batch, capable of manufacturing the resin coloring master batch excellent in dispersibility of a coloring agent with high productivity.SOLUTION: The manufacturing method of the resin coloring master batch comprises a process of providing a sheet-like kneaded object having a sheet thickness of 7 mm or less by rolling the kneaded object provided by heating-kneading a mixture of including resin and the coloring agent under cooling by using a rolling cooling roll after being pushed out by using an extruder and a process of crushing the provided sheet-like kneaded object, and the extruder comprises a tapered screw of gradually thinning toward the extrusion tip and a temperature-adjustable base detachably arranged on the extrusion tip, and pushes out the kneaded object by the extruder so as to satisfy a predetermined condition.