When performing tensile tests on fiber rope according to EN 919, a certain expertise is required. And Zwick meets these requirements with special rope specimen grips and an optical extensometer system. The untwisting of the rope must be prevented or kept to an absolute minimum when stretching. Application of measurement markings on the surface of braided or twisted test specimens is also difficult. Because of the energy released when the rope breaks, a non-contact measuring optical extensometer is required. Zwick offers the optimum solution to the test set-up with diverse wrap and rope specimen grips in conjunction with a non-contact extensometer system.

The adhesion test makes it possible to determine the layer adhesion in laminates such as conveyor belts. The material specimen is prepared in accordance with EN ISO 252-1. The first layer is removed at one end of the cut-to-length test piece and then clamped into the specimen grip. The document lays down two test procedures A and B for determining the adhesion between the layers and between the cover plates and the carcass of conveyor belts. The essential requirements of the test comply with ISO 36. It can be applied to all types of conveyor belts with the exception of belts with steel cord inserts and belts with textile inserts whose nominal tensile strength is less than 160N/mm.