Table 3.
Results for varying wood species and processing parameters.
| Sample | Yield (%) | Shives (%) | Kappa | Brightness (%) | Viscosity (mL/g) |
|---|---|---|---|---|---|
| SWS | 48.7 ± 1.1 | 0.17 ± 0.11 | 14.2 ± 2.2 | 32.9 ± 0.6 | 1057 |
| SWM | 49.3 ± 1.5 | 1.24 ± 0.19 | 17.7 ± 0.1 | 33.5 ± 0.1 | 1122 |
| SWL | 48.6 ± 1.3 | 3.48 ± 0.87 | 19.9 ± 1.7 | 34.5 ± 0.2 | 1158 |
| HWS | 50.4 ± 0.9 | 0.38 ± 0.29 | 8.8 ± 0.1 | 34.2 ± 0.7 | 1252 |
| HWM | 50.0 ± 0.7 | 2.45 ± 0.46 | 10.5 ± 0.1 | 32.7 ± 0.9 | 1281 |
| HWL | 49.1 ± 0.8 | 6.37 ± 0.10 | 11.7 ± 0.1 | 33.2 ± 1.2 | 1278 |
| HWA | 44.1 ± 0.1 | 11.61 ± 0.94 | 13.7 ± 0.25 | 34.0 ± 0.5 | - |
| HWAV | 46.7 | 6.94 | 11.8 | 33.8 ± 0.3 | - |
| HWAL | 32.9 | 29.12 | 22.1 | 29.2 ± 0.1 | - |
| HWAH | 49.9 | 2.16 | 9.3 | 31.5 ± 0.1 | - |
| HWA0.75 | 40.1 | 20.38 | 19.9 | 29.0 ± 0.2 | - |
| HWA0.5 | 28.9 | 41.78 | - | 24.4 ± 0.1 | - |
| SWR | 43.5 | 0.97 | 23.9 | 33 | 1111 |
| HWR | 50.7 | 1.01 | 14.7 | 37.5 | 1269 |
The average value with standard deviation is shown for duplicate samples. Unsorted chips “A” is the average of all measured chips for each species. “S” refers to the smallest fraction of chips, “M” medium fraction, and “L” large fraction. High and low processing temperature is denoted by “H” and “L” respectively. The introduction of a vacuum impregnation is denoted by “V”. Chemical charge is denoted as the percentage of standard, “0.75” and “0.5” respectively. See Table 2 for a full breakdown of parameters.