Top grade fumed rubber

1.  

   	JF-3530A	JF-3540A		JF-3550A		JF-3560A		JF-3570A
   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    %  ≥	900	800		600		500		400
   Permanent set at break  %  ≤	8	8		8		8		8
   Tear strength     kN/m ≥	20	35		45		45		45
   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℃×5min Secondary vulcanization condition: 200℃×3hr
   Vulcanizing agent: DHBP (active matter is 80%), dosage 0.7%