Influence of Soda Pulping Variables on Properties of Pineapple (Ananas comosus Merr.) Leaf Pulp and Paper Studied by Face-Centered Composite Experimental Design

Table 3

The value of response variables for each condition.

Number	Independent variables			Screened yield (wt%)		Avg. screened yield	Kappa number		Avg. kappa number	Tensile index (kN·m/kg)		Avg. tensile index	Burst index (kPa·m^2/g)		Avg. burst index	Tear index (N·m^2/kg)		Avg. tear index
	(%)	(°C)	(min)	Number 1	Number 2		Number 1	Number 2		Number 1	Number 2		Number 1	Number 2		Number 1	Number 2
1	4	90	20	18.30	18.32	18.31	30.05	29.83	29.94	46.94	46.25	46.60	1.80	1.75	1.78	1.82	1.75	1.78
2	4	90	60	17.98	17.56	17.77	29.57	29.63	29.60	45.40	46.12	45.76	1.86	1.82	1.84	1.79	1.77	1.78
3	4	110	40	22.85	22.47	22.66	27.73	27.71	27.72	42.47	42.34	42.41	1.79	1.74	1.77	1.61	1.63	1.62
4	4	130	20	21.34	21.29	21.32	25.41	25.39	25.40	40.01	40.55	40.28	1.64	1.67	1.66	1.69	1.65	1.67
5	4	130	60	20.92	20.83	20.88	24.11	24.32	24.22	39.49	38.98	39.24	1.57	1.54	1.56	1.50	1.54	1.52
6	4.5	90	40	17.52	17.41	17.47	29.16	29.24	29.20	45.81	45.12	45.47	1.77	1.71	1.74	1.72	1.68	1.70
7	4.5	110	20	22.47	22.25	22.36	26.21	26.95	26.58	42.12	42.89	42.51	1.70	1.68	1.69	1.67	1.70	1.69
8	4.5	110	40	22.56	23.64	23.10	25.85	25.98	25.92	41.86	41.05	41.46	1.59	1.50	1.55	1.48	1.51	1.49
9	4.5	110	60	19.53	19.80	19.67	24.69	24.78	24.74	38.78	39.02	38.90	1.50	1.55	1.53	1.41	1.46	1.44
10	4.5	130	40	19.44	20.12	19.78	23.33	23.39	23.36	36.92	37.02	36.97	1.40	1.42	1.41	1.45	1.47	1.46
11	5	90	20	20.34	19.39	19.87	28.71	28.83	28.77	44.92	44.48	44.70	1.70	1.62	1.66	1.67	1.64	1.66
12	5	90	60	20.98	21.57	21.28	27.12	27.07	27.09	43.25	43.58	43.42	1.66	1.70	1.68	1.65	1.69	1.67
13	5	110	40	20.42	20.67	20.55	24.48	24.55	24.52	38.80	38.77	38.79	1.52	1.48	1.50	1.47	1.50	1.49
14	5	130	20	19.57	19.09	19.33	24.24	24.27	24.26	36.85	37.14	36.99	1.43	1.38	1.41	1.54	1.49	1.52
15	5	130	60	17.33	17.62	17.48	23.02	23.11	23.07	34.66	35.36	35.01	1.25	1.20	1.23	1.28	1.33	1.31

Note: Avg. = average.