Preparation of Modified Kaolin Filler with Cesium and Its Application in Security Paper

Table 2

Mechanical and optical properties of γ-irradiation wood paper handsheets: without kaolin, 12% kaolin, and 12% Cs-kaolin.

		Mechanical properties			Optical properties
Wood paper handsheets		Burst index	Tensile index	Tear index	Brightness	Opacity
	Radiation dose (KGy)	Kpa·m^2/g	N·m/g	mN·m^2/g	%	%
Without kaolin	0	4.57	43.24	9.93	77.10	76.70
	3	4.50	42.52	9.90	76.80	76.50
	6	4.46	41.63	9.87	76.50	76.50
	9	4.41	40.40	9.79	76.00	76.30
	12	4.35	39.52	9.70	75.90	76.50
	15	4.32	38.81	9.66	75.70	76.30
12% kaolin	0	3.84	32.28	9.44	82.30	78.00
	3	3.76	31.36	9.38	82.00	77.90
	6	3.69	30.64	9.33	81.80	78.20
	9	3.61	29.54	9.29	81.10	78.24
	12	3.56	28.66	9.25	80.70	78.30
	15	3.51	27.59	9.23	80.50	78.10
12% Cs-kaolin	0	4.02	35.29	9.71	84.50	78.50
	3	3.94	34.57	9.66	84.10	78.40
	6	3.87	33.76	9.61	83.80	78.51
	9	3.82	32.64	9.57	83.20	78.60
	12	3.77	31.86	9.52	83.00	78.80
	15	3.71	31.13	9.46	82.80	78.70