Common fumed rubber

1. 
   

    

   	JF-3530	JF-3540	JF-3550		JF-3560	JF-3570
   Appearance	transparent, without mechanical impurities
   Density, g/cm3	1.07±0.04	1.13±0.04		1.15±0.04	1.18±0.04	1.22±0.04
   Hardness, Shore A	30±2	40±2		50±2	60±2	70±2
   Tensile strength, MPa≥	8.0	9.0		9.0	9.0	8.5
   Elongation at failure, %≥	800	700		600	500	400
   Permanent set at break, %≤	8	8		8	8	8
   Tear strength, kN/m≥	25	30		40	40	40
   Volume resistivity, Ω·cm ≥	1.0×1016
   Dielectric strength, kV/mm ≥	22
   Once linear shrinkage %	3.2~3.7	3.0~3.6		2.9~3.4	2.8~3.4	2.6~3.2

   Physical and mechanical performance indexes are Once vulcanization data, electrical property indexes are Secondary vulcanization data .
   Once vulcanization condition for experimental sheet: 175℃Χ5mins Secondary vulcanization condition: 200℃ⅹ3hrs
   Vulcanizing agent: liquid DHBP, dosage 0.7%