General purposed extruding rubber

1. 
   

    

   	JF-2550		JF-2560		JF-2570		JF-2580
   	Wire extruding type	Pipe extruding type	Wire extruding type	Pipe extruding type	Wire extruding type	Pipe extruding type	Wire extruding type	Pipe extruding type
   Appearance	translucent, without obvious mechanical impurities
   Density, g/cm3	1.18±0.05		1.20±0.05		1.22±0.05		1.25±0.05
   Hardness, Shore A	50±2		60±2		70±2		80±2
   Tensile strength, MPa≥	7.5		7.5		7.0		6.5
   Elongation at failure, %≥	440	380	360	300	240	200	180	150
   Permanent set at break, %≤	14	12	14	12	14	12	10	10
   Tear strength, kN/m≥	24		24		24		20
   Volume resistivity, Ω·cm≥	3.0×1014
   Dielectric strength, kV/mm≥	20

   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%