Ply Bond Tester (Z-direction tensile) This equipment confirms to TAPPI (T 541) standards and is intended to evaluate the internal fiber bond strength (cohesive strength) of paper and paperboards. Significance : The internal bond strength of paperboard provides an indication of expected performance, e.g., strength of board in relation to glue bonding at carton side seams, and possible delamination on scoring, or use of high tack coatings. This method has also been found useful for the evaluation of coated fine papers. The results must be interpreted according to each user's requirement and to each end use. Capacities Available : Standard Range : 0 - 100 kgf in Compression and 0 - 25 kgf in Z-direction Tensile Models available : Various models starting from Economy Digital models to the high-end Fully Automatic Computerized models. This equipment is relevant to : Paper Mills. Carton Manufacturers. Heavy End-Users of Paper and Cartons. Research Institutions. Packaging Development centers.