BESCHICHTUNGSFILM-BILDENDER WIRKSTOFF FÜR SCHNEIDSCHRAUBEN, VERFAHREN ZUR HERSTELLUNG DES BESCHICHTUNGSFILM-BILDENDER WIRKSTOFF , VERFAHREN ZUR BILDUNG DES BESCHICHTUNGSFILMS AUF DEM AUßENUMFANG VON SOF SCHNEIDSCHRAUBEN UNTER EINSATZ DES BESCHICHTUNGSFILM-BILDENDEN WIRKSTOFFS UND SCHNEIDSCHRAUBE MIT UNTER NUTZUNG DES WIRKSTOFFS GEBILDETEN BESCHICHTUNGSFILMS

Provided are a coating agent capable of forming, on the periphery of a tapping screw, a coating layer which can hold female-thread-forming chips generated during screwing of the tapping screw into a prepared hole of a workpiece, thereby preventing scattering of the female-thread-forming chips; and a tapping screw having thereon a coating layer formed from the coating agent. The coating agent is a composition containing, as primary components, calcium montanate or a calcium-montanate-containing montanic acid species mixture, a thermoplastic resin emulsion, and water. The coating agent can form, on the periphery of a tapping screw, a coating layer which exhibits a lubricating function, and a function of capturing female-thread-forming chips.