PAINT FILM SCRATCHING TEST METHOD AND TEST DEVICE

摘要

PROBLEM TO BE SOLVED: To reproduce accurately the paint film scratching state in a car washing machine for an automobile. ;SOLUTION: A test brush 24 to be installed on a rotor 23 is composed by combining an abrasive-grain brush 24A in which abrasive grains having grain sizes of 25-40 μm are impregnated with a normal brush 24B having no abrasive grains. The ratio of the number of the abrasive-grain brushes 24A is 10-25%. When washing of a paint film test piece 41 by the rotating test brush 24 is executed, washing water, in which minute abrasive grains having grain sizes of 5 μm or less are mixed, is supplied.;COPYRIGHT: (C)2000,JPO