Table 5 Combined effect of enzyme and cationic starch dose on EMC and tensile strength of paper for BHW-1k PFI mill refining
Enzyme dose (%) | Cationic starch dose (%) | Duration of pretreatment (min) | Freeness (mL) | EMC (%) | Tensile index (Nm/g) | Bulk (cm3/g) | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| Â | Â | Â | Avg | Std | Avg | Std | Avg | Std | Avg | Std |
Refined to 1000 rev | ||||||||||
0 | 0 | n/a | 510 | 5 | 61.11 | 0.90 | 61.22 | 4.45 | 1.60 | 0.01 |
| Â | 0.5 | n/a | 550 | 9 | 58.12 | 1.14 | 73.73 | 3.69 | 1.40 | 0.01 |
| Â | 1 | n/a | 570 | 6 | 57.69 | 0.76 | 71.83 | 3.60 | 1.42 | 0.02 |
0.5 | 0 | 30 | 600 | 8 | 53.76 | 0.98 | 59.27 | 6.38 | 1.88 | 0.00 |
| Â | 0.5 | 30 | 628 | 5 | 50.05 | 1.01 | 76.69 | 4.24 | 1.82 | 0.02 |
| Â | 1 | 30 | 629 | 6 | 56.73 | 0.90 | 66.45 | 3.11 | 1.79 | 0.02 |
1 | 0 | 30 | 602 | 4 | 56.68 | 1.10 | 56.03 | 3.79 | 1.54 | 0.03 |
| Â | 0.5 | 30 | 629 | 6 | 55.94 | 1.07 | 71.33 | 4.41 | 1.55 | 0.02 |
| Â | 1 | 30 | 630 | 5 | 55.56 | 0.73 | 65.13 | 1.94 | 1.54 | 0.02 |