Some complementary scratch resistance characterization methods

Abstract

In the characterization of mar/scratch resistance of coatings/materials with single-probe techniques, the probe usually scrapes the tested surface under a constant load or increasing load, followed by dimensional measurements of the scratch, identification of the critical force at which cracking/fracture occurs, or evaluation with optical instruments. Due to a variety of coatings/materials properties and various application requirements, the single-probe method may not provide pertinent characterization of coatings/materials in their applications in some cases. Three complementary test methods are presented in this article: i.e., a crack density measurement used for fragile thermoplastic olefin (TPO), a repeated scratching test, and a cross-scratching test used for glazing materials for automobile windows.

Improvement of scratch resistance of plastic substrates for display screens by employment of low-modulus sublayer

“…To date, only Briscoe et al [18][19][20][21][22] and more recently Sue and coworkers [23,24] and Gauthier et al [25,26] have studied the effects of different test variables on the scratch behavior of polymers. In the characterization of mar and scratch resistance of coatings with single-probe techniques, the probe usually scrapes the tested surface under a constant load or increasing load, followed by dimensional measurements of the scratch, identification of the critical force at which cracking and fracture occurs, or evaluation with optical instruments [27].…”

Reduction of aesthetical properties of organic coatings caused by mechanical damage

“…The Crockmeter produces linear damage using a rubber finger with and without the presence of abrasive powder. In other studies [1,[8][9][10][11][12][13][14][15][16], single-probe devices, including instrumented indentation and scratch systems and atomic force microscopes, have been used to simulate single asperity contact, as opposed to multi-asperity contact associated with the field simulation tests. In this case it is not easy to correlate the experimental data with the mar phenomenon.…”