A recent patented work has been able to produce a modified die and tool set that can create a notch in the compacted sample without the need of subsequent machining of the sample. This is usually done through machining the sample. In order to conduct the fracture toughness test, a notch needs to be created on the sample. In powder compaction process, one of the most essential aspect that needs to be considered is the strength of the compacted materials that is commonly measured using the fracture toughness test.
In conclusion, the addition of mannitol improved the tablet strength and shorten the disintegration time in the experimental range employed in this study. Meanwhile, the effects of mannitol composition in the tablet on these observed responses were also dependent upon the compaction pressures used during tablet formation. The tablet formed having 95% w/w mannitol composition exhibited the highest plastic work value of 10.32☐.01 J, highest maximum ejection pressure value of 4.4☐.06 MPa, highest tensile strength value of 1.06☐.04 MPa and shortest disintegration time of 171±51 s amongst the three different mannitol compositions studied. The results showed that the increase in the compaction pressures increased the plastic work, maximum ejection pressure, tablet strength and also its disintegration time. The tablet strength was determined using the tensile strength method and tablet disintegration study was also conducted. The compaction behaviour of the powder during the compaction process was evaluated using the plastic work and the maximum ejection stress values. The compaction pressures used in making the tablets varied at 37.67 MPa, 75.34 MPa, 113.01 MPa, 150.68 MPa and 188.35 MPa. The composition of mannitol in the mannitol-cocoa tablet varied at 95% w/w, 50% w/w and 5% w/w, while pure 100% w/w mannitol and cocoa tablets were set as controls. The frictional, compaction, tablet mechanical and disintegration properties were studied due to their importance in characterizing the behaviour of the tablets during processing and its final product characteristics at varying mannitol contents. In this work, mannitol powder was mixed with cocoa powder and compacted into tablet form via the uniaxial die compaction process. Cocoa powder is an important ingredient in the confectionery industry and, mannitol is an alternative sugar alcohol.
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