Influence of Soda Pulping Variables on Properties of Pineapple (Ananas comosus Merr.) Leaf Pulp and Paper Studied by Face-Centered Composite Experimental Design
Table 6
Comparison of pulp and paper properties of our observed data with predicted value from the model at optimum condition.
Number
Independent variables
Screened yield (wt%)
% Diff. of yield
Kappa number
% Diff. of kappa number
Tensile index (kN·m/kg)
% Diff. of tensile index
Burst index (kPa·m2/g)
% Diff. of burst index
Tear index (N·m2/kg)
% Diff. of tear index
(%)
(°C)
(min)
Pre. Opt.
Obs.
Pre. Opt.
Obs.
Pre. Opt.
Obs.
Pre. Opt.
Obs.
Pre. Opt.
Obs.
1
4
105
20
21.29
20.98
1.46
28.12
28.00
0.43
44.13
44.77
1.45
1.76
1.68
4.55
1.68
1.57
6.55
2
4
105
20
21.29
21.55
1.22
28.12
27.97
0.53
44.13
43.97
0.36
1.76
1.61
8.52
1.68
1.52
9.52
3
3
110
40
—
24.61
—
—
31.55
—
—
35.97
—
—
1.47
—
—
1.38
—
4
3
110
40
—
24.67
—
—
31.87
—
—
36.09
—
—
1.50
—
—
1.31
—
Note: Diff. = difference. Obs. = observed data. Pre. Opt. = predicted value from the model at optimum condition.
