Inside Cover, Volume 131, Issue 3



The adhesion of rubber compounds to brass-plated steel cords is particularly significant in radial tires. Xinyan Shi et al. summarize the advantages and disadvantages of existing test methods, and introduce a novel testing technique for the dynamic adhesion of rubber/steel cords. The surfaces of “pulled-out” steel cords are examined by stereoscopic zoom microscope. Before and after fatigue, the covered rubber on the pulled-out cords forms a “screw thread” form; while the greatest pulled-out force corresponds to clearer, more uniform, screw-like rubber coverage with finer screw threads. The cover image shows micrographs of rubber coverage on pulled-out steel cords. The new method is very simple, reliable, and does not require extra capital investment. DOI: 10.1002/app.39460