PURPOSE: To increase a friction force and a washing ability by using brush fibers that a specified volume of inorganic non-metallic materials is mixed with a resin material and molten with heat to form fibrous.

CONSTITUTION: Brush materials are utilized, that inorganic non-metallic materials of 1-30% in weight are mixed in a resin material and molten at a specified temperature to form fibrous. Various kinds of materials can be applied for the inorganic non-metallic materials, but natural minerals such as zeolite or others are more preferable from the view point of cost. Polypropylene polyethylene, nylon, polyvinylchloride, polybuthylene, etc., are available for the resin material. Less addition than 1% of inorganic non-metallic materials against the resin material does not give a sufficient abrasive force to the side face of the fiber and those more than 30% make the fiber brittle and the flexibility thereof is lost.