Paper and Fibre Science and Technology Warren Batchelor, Australian Pulp and Paper Institute, Monash University |
Kaustubh was awarded his Masters by Research thesis on the 21st of June 2007. Chapter 2 reviews the literature and the studies carried out so far in the
pursuit of measuring shear bond strength. It also discusses the difficulties in
measuring shear bond strength and the various pros and cons of the previously
devised methods. Chapter 3 presents the new experimental methods designed in the studies for this thesis and explains the idea behind the design. It also describes the various steps in designing the new experiments and the equipment used. Isotropic handsheets with proper grammages and thickness control were prepared and acid (HCl) exposed to weaken the fibres in the sheet of paper to such an extent that the fibre strength equaled the bond strength of a single fibre-fibre bond. Uniform acid exposure and an arrangement to rapidly remove the acid vapours from the vicinity of the sheet were needed to stop the reaction between the acid and the paper. A new rig was designed for this purpose. Optimum exposure was determined by observing the tensile test fracture line with the help of confocal laser scanning microscopy after different levels of acid exposure. Zero span tensile strengths were used to determine the fibre strength. Fibre width has been measured using the confocal microscopy and image analysis software.
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