Item	Unit	Standard	Index
Unit area tolerance	g/m2	GB/T13762-1992	160	180	200
Thickness	mm	GB/T13761-1992	1. 40	1. 50	1. 60
Tensile strength MD/CD	KN/m>	GB/T3923. 1-1997	8. 00	9. 00	10. 00
ElongationMD/CD	%	GB/T3923. 1-1997	40~70
Trapezoid tear strengthMD/CD	KN>	GB/T13763-1992	0. 23	0. 26	0. 28
CBR puncture strength	KN>	GB/T14800-1993	1. 50	1. 70	1. 80
Loading strength	mm	JTJ/T019-98	20	23	25
Hole size	mm	GB/T17634-1998	0. 070. 20
Vertical permeability	cm/s	GB/T15789-1995	k× (10-1 10-3), K=19. 9
Width	m	GB/T4667-1995	5. 1	5. 1	5. 1