PAPERmaking! g FROM THE PUBLISHERS OF PAPER TECHNOLOGY Volume 1, Number 1, 2015
adding CPAM to the furnish, along with the addition of Nanosilver, the folding endurance declined. This probably can be attributed to a lack of hydrogen bonding between cotton fibres. Addition of filler in paper results in a weakening of the fibre network, lack of long fibre in pulp suspension, and a higher level of fines in the paper; such changes are consistent with a decrease in folding endurance (Erfani 2011). As can be seen in Figure 7, folding strength of handsheets was very low and there was considerable difference between the values obtained in the present work compared to the common level of Banknote paper folds (about 5000). This difference probably can be attributed to the properties of the pulp that was provided before the trimming refiner. A trimming refiner causes fibre fibrillation and increases hydrogen bonds in paper machine before papermaking.
Figure 6. Effect of CPAM and Nanosilver on tear index of Banknote paper
Figure 7. Effect of CPAM and Nanosilver on folding strength of Banknote paper
Biological Test of Banknote paper According to Figure 8, for both types of bacteria Staphylococcus aureus and Escherichia coli , by increasing the amount of CPAM, the UV adsorption was reduced and the greatest reduction was obtained when using retention aid at the 1% level. This shows that higher
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Article 3 – Hygiene (nanosilver)
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