Changes in fold cracking properties and mechanical properties of high-grammage paper as affected by additive and fillers

Fold cracking, which reduces the economic feasibility of paper-making, is a localized surface deformation caused by extreme bending stress. Most paper products, such as base and coated paper, generate fold cracking during folding processing. To control mechanical properties can be strengthened, flexibility structure increased controlling modification in pulp fibers stock preparation conditions. This study analyzed changes high-grammage response to addition precipitated calcium carbonate (PCC) cationic starch (C-starch). The application inorganic filler drastically reduced internal bond strength tensile strength, causing whereas C-starch between fibers, improved elongation. However, when applied independently, occurred because increase or decrease strength. Therefore, combined PCC made it possible form paper-based with high resistance. Moreover, resistance was excellent, were balanced without being biased one direction even under conditions relatively low properties.